## U.S. Department of the Interior U.S. Geological Survey



# Water Resources Data Florida Water Year 2001

Volume 4. Northwest Florida

Water-Data Report FL-01-4

Prepared in cooperation with the State of Florida and with other agencies

# UNITED STATES DEPARTMENT OF THE INTERIOR

GALE A. NORTON, Secretary

U. S. GEOLOGICAL SURVEY

Charles G. Groat, Director

Prepared in cooperation with the State of Florida and with other agencies as listed under cooperation

For additional information write to District Chief, Water Resources Division U.S. Geological Survey 227 North Bronough Street, Suite 3015 Tallahassee, Florida 32301

2002

## iii WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida



# PREFACE

This volume of the annual hydrologic data report of Florida is one of a series of annual reports that document hydrologic data gathered from the U.S. Geological Survey’s surface- and ground-water data-collection networks in each State, Puerto Rico, and the Trust Territories. These records of streamflow, ground-water levels, and quality of water provide the hydrologic information needed by State, local, and Federal agencies, and the private sector for developing and managing our Nation’s land and water resources. Hydrologic data for Florida are contained in four volumes:

Volume 1. Northeast Florida Volume 2. South Florida Volume 3. Southwest Florida Volume 4. Northwest Florida

This report was prepared for publication by Darlene A. Blum and A. Ernie Alvarez under the supervision ofStewart A. Tomlinson and James D. Goin. The following individuals contributed significantly to the collection, processing, and tabulation of the data:

This report was prepared in cooperation with the State of Florida and with other agencies listed on page 1. J.C. Collins E.L. Rau D.B. Dale R.B. Stanley G.B. Donley M.A. Franklin D.M. Stephens J.A. Tomberlin D.C. Geller R.J. Verdi P.E. Meadows S.G. Welch

# REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188

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SPONSORING / MONITORING Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0 704-0188), Washington, DC 20503.



# September 2002 Annual-Oct. 1, 2000 thru Sept. 30, 2001

Water Resources Data, Florida, Water Year 2001 Volume 4, Northwest Florida

U.S. Geological Survey Water Resources Division 227 N. Bronough Street, Suite 3015 Tallahassee, FL 32301 USGS-WDR-FL-01-4

U.S. Geological Survey Water Resources Division 227 N. Bronough Street, Suite 3015 Tallahassee, FL 32301 USGS-WDR-FL-01-4

Prepared in cooperation with the State of Florida and other agencies.

No restriction on distribution. This report may be purchased from: National Technical Information Center Springfield, VA 22161

This report series for the 2001 water year for the state of Florida consists of records for continuous or daily discharge for 387 streams, periodic discharge for 14 streams, continuous or daily stage for 147 streams, periodicstage for 2 streams, peak stage and discharge for 8 streams, continuous or daily elevations for 14 lakes, periodic elevations for 47 lakes, continuous ground-water levels for 429 wells, periodic ground-water levels for 1,257 wells, and quality-of-water for 112 surface-water sites and 248 wells. This volume (Volume 4, Northwest Florida) contains records of continuous or daily discharge for 65 streams, periodic discharge for 1 stream, continuous or daily stage for 18 streams, periodic stage for 2 streams, peak stage and discharge for 0 streams, continuous or daily elevations for 1 lake, periodic elevations for 1 lake, continuous ground-water levels for 2 wells, periodic ground-water levels for 3 wells, and quality-of-water for 3 surface-water sites and 0 wells. These data represent the National Water Data System records collected by the U.S. Geological Survey and cooperating local, State, and Federal agencies in Florida.

*Florida, *Hydrologic data, *Surface water, *Ground water, *Water-quality, Flow rate,Gaging stations, Lakes, Reservoirs, Chemical analyses, Sediments, Water temperatures, Sampling sites, Water levels, Water analyses, Elevations, Water wells 152

UNCLASSIFIED UNCLASSIFIED

## v WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

Figure 1. Geographic area covered by this report. G U L

F

O F

M E X I C O A T L A N T I C

O C E A N 

### ALABAMA

GEORGIA



### 0 20 40 60 80 100 MILES

0 20 40 60 80 100 KILOMETERS 31°

30°

29°

28°

27°

26°

25° 87° 86° 85° 84° 83° 82° 81° 80°



# VOLUME 4

NORTHWEST

FLORIDA



# VOLUME 3

SOUTHWEST

FLORIDA



# VOLUME 2

SOUTH FLORIDA 

# VOLUME 1

NORTHEAST

FLORIDA



## EXPLANATION

AREA COVERED BY THIS REPORT

## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida



## vii 

# _____________

CONTENTS

_____________

Preface ....................................................................................................................... ............................................................... iii List of Illustrations.......................................................................................................... ........................................................... viii List of Surface-Water Stations, in Downstream Order, for Which Records are Published .......................................... ............ ix List of Ground-Water Wells, by County, for Whic h Records are Published ........................................................ ................... x List of Discontinued Surface-Water Discharg e Stations ......................................................................... ................................. xi Introduction .................................................................................................................. ............................................................. 1 Cooperation ................................................................................................................... ............................................................ 1 Summary of Hydrologic Conditions .............................................................................................. ........................................... 2 Rainfall ...................................................................................................................... ........................................................ 2 Surface Water ................................................................................................................. ................................................... 2 Ground Water .................................................................................................................. .................................................. 3 Water Quality ................................................................................................................. ................................................... 3 Special Networks and Programs ................................................................................................. .............................................. 12 Explanation of the Records .................................................................................................... ................................................... 13 Station Identification Numbers ................................................................................................ .......................................... 13 Downstream Order System ....................................................................................................... ................................. 13 Latitude-Longitude System ..................................................................................................... ................................... 13 Records of Stage and Water Discharge .......................................................................................... ................................... 13 Data Collection and Computation ............................................................................................... ............................... 14 Data Presentation ............................................................................................................. ........................................... 15 Station Manuscript ............................................................................................................ .................................. 15 Data Table of Daily Mean Values ............................................................................................... ........................ 16 Statistics of Monthly Mean Data ............................................................................................... ......................... 17 Summary Statistics ............................................................................................................ .................................. 17 Accuracy of the Records ....................................................................................................... ..................................... 18 Other Records Available ....................................................................................................... ..................................... 19 Records of Surface-Water Quality .............................................................................................. ...................................... 19 Classification of Records ..................................................................................................... ...................................... 19 Arrangement of Records ........................................................................................................ .................................... 19 Onsite Measurements and Sample Collection ..................................................................................... ....................... 19 Sediment ...................................................................................................................... ............................................... 20 Laboratory Measurements ....................................................................................................... ................................... 20 Data Presentation ............................................................................................................. ........................................... 20 Manuscript .................................................................................................................... .............................................. 20 Remark Codes .................................................................................................................. .......................................... 21 Dissolved Trace-Element Concentrations ........................................................................................ .......................... 21 Change in National Trends Network Procedures .................................................................................. ..................... 21 Quality-Control Data .......................................................................................................... ........................................ 21 Blank Samples ................................................................................................................. ........................................... 22 Reference Samples ............................................................................................................. ........................................ 22 Replicate Samples ............................................................................................................. ......................................... 22 Spike Samples ................................................................................................................. ........................................... 23 Records of Ground-Water Levels ................................................................................................ ...................................... 23 Data Collection and Computation ............................................................................................... ............................... 23 Data Presentation ............................................................................................................. ........................................... 23 Records of Ground-Water Quality ............................................................................................... ..................................... 24

## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida



## viii Data Collection and Computation ............................................................................................... ............................... 24 Data Presentation ............................................................................................................. ........................................... 25 Access to USGS Water Data ..................................................................................................... ................................................ 25 Definition of Terms ........................................................................................................... ........................................................ 26 Publications on Techniques of Water-Resources Investigations .................................................................. ............................ 39 Stage, Discharge, and Water Quality of Streams ................................................................................ ...................................... 43 Elevation of Lakes ............................................................................................................ ........................................................ 137 Well Descriptions and Ground-Water Data ....................................................................................... ....................................... 143 Miscellaneous Water Level Measurements ......................................................................................... ...................................... 149 Index ......................................................................................................................... ................................................................. 151



# ________________ ILLUSTRATIONS

________________
Figure 1. Geographic area covered by this report............................................................................... ......................................................... v
Figure 2. Santa Fe River near Worthington Springs (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1932-2001, and (B) the monthly mean discharge for the period 1992-2001 4

Figure 3. Suwannee River at Branford (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1931-2001, and (B) the monthly mean discharge for the period 1992-2001 ................ 5

Figure 4. Steinhatchee River near Cross City (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1950-2001, and (B) the monthly mean discharge for the period 1992-2001 ...... 6

Figure 5. Ochlockonee River near Havana (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1926-2001, and (B) the monthly mean discharge for the period 1992-2001 ................ 7

Figure 6. Chipola River near Altha (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1943-2001, and (B) the monthly mean discharge for the period 1992-2001 ........................... ... 8

Figure 7. Shoal River near Crestview (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1938-2001, and (B) the monthly mean discharge for the period 1992-2001 ........................... ... 9

Figure 8. Escambia River near Century (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1934-2001, and (B) the monthly mean discharge for the period 1992-2001 ................ 10

Figure 9. USGS Well near Wausau (A) Monthly maximum water level for the 2001 water year compared to maximum, minimum, and mean monthly maximum water levels for the period 1963-2001 and (B) the monthly maximum water level for the period 1998-2001 ................................................................................................. .................................................... 11

Figure 10. System for numbering wells and miscellaneous sites (latitude and longitude) .......................................... .................................. 14

Figure 11. Location of stream gaging and lake gaging stations in Northwest Florida Water Management District .................... ................. 44

Figure 12. Location of stream gaging stations in Suwannee River Water Management District. ...................................... ........................... 44

Figure 13. Location of wells in Wakulla County .................................................................................. ......................................................... 144

Figure 14. Location of wells in Washington County............................................................................... ....................................................... 146

## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

SURFACE-WATER STATIONS, IN DOWNSTREAM ORDER, FOR WHICH RECORDS ARE PUBLISHED IN THIS VOLUME
[Letters after station names designate type of data: (d) discharge, (q) discharge measurements only, (c) chemical, (b) biological, (m) microbiological, (s) sediment, (t) temperature, (e) elevation, gage heights, or contents]

Station Number Page



## ix WACCASASSA RIVER BASIN 

## Waccasassa River near Gulf Hammock, FL (d)................................................................................... 02 313700 45

SUWANNEE RIVER BASIN 

## Alligator Creek near Fargo, GA (e) ............................................................................................. .... 0231427398 46 Bay Creek Near Fargo, GA (e)................................................................................................... ...... 0231427399 47 Suwannee River at Sill near Fargo, GA (d,c,t).................................................................................. ... 02314274 48 North Fork Suwannee River at Sill near Far go, GA (d,c,t)................................................................ 0231427 41 50 Jones Creek Pond near Fargo, GA (e).................................................................................... 30435608 2321700 138 Gator Creek Dam near Fargo,GA (e)..................................................................................... 304553082 295000 139 Cypress Creek near Edith, GA (q) ......................................................................................... 303902 082315200 52 Suwannee River near Benton, FL (d,e) ........................................................................................... ............02315000 53 Suwannee River at White Springs, FL (d,e)...................................................................................... ..........02315500 55 Alapaha River near Jennings, FL (d,e).......................................................................................... ....... 02317620 57 Withlacoochee River near Pinetta, FL (d)....................................................................................... ..... 02319000 59 Withlacoochee River near Lee, FL (d)........................................................................................... ...... 02319394 60 Suwannee River at Ellaville, FL (d,e) .......................................................................................... ...............02319500 61 Suwannee River at Dowling Park, FL (d,e) ....................................................................................... .........02319800 63 Suwannee River at Luraville, FL (d,e).......................................................................................... ..............02320000 65 Suwannee River at Branford, FL (d,e) ........................................................................................... .............02320500 67 New River near Lake Butler, FL (d) ............................................................................................. 02321000 69 Santa Fe River at Worthing ton Springs, FL (d,e)................................................................................ . 02321500 70 Santa Fe River at US Hwy 441 near High Springs, FL (d).................................................................. 0232197 5 72 Santa Fe River near Fort White, FL (d) ......................................................................................... ...... 02322500 73 Santa Fe River near Hildreth, FL (d) ........................................................................................... ........ 02322800 74 Suwannee River near Bell, FL (d)............................................................................................... ................ 02323000 75 Suwannee River near Wilcox, FL (d,e)........................................................................................... ............02323500 76 Suwannee River above Gopher River near Suwannee, FL (d,e,c,t)............................................................023235 92 78

STEINHATCHEE RIVER BASIN 

## Steinhatchee River near Cross City, FL (d)..................................................................................... ............02324000 82

FENHOLLOWAY RIVER BASIN 

## Fenholloway River near Foley, FL (d) ........................................................................................... .............02324400 83 Fenholloway River near Perry, FL (d)........................................................................................... ..............02325000 84

ECONFINA RIVER BASIN 

## Econfina River near Perry, FL (d) .............................................................................................. .................02326000 85

AUCILLA RIVER BASIN 

## Aucilla River at Lamont, FL (d,e).............................................................................................. .................02326500 86

ST. MARKS RIVER BASIN 

## Ward Creek below Mitchell Pond near Metcalf, GA (q) ....................................................... 304308083555200 89 St. Marks River Near Newport, FL (d) ........................................................................................... ............02326900 90

OCHLOCKONEE RIVER BASIN 

## Lost Creek at Arran, FL (d).................................................................................................... .............. 02327033 91 Sopchoppy River near Sopchoppy, FL (d)......................................................................................... .. 02327100 92 Ochlockonee River near Concord, FL (d)......................................................................................... ..........02328522 93 Ochlockonee River near Havana, FL (d,e)........................................................................................ ..........02329000 94 Lake Jackson near Tallahassee, FL (e).......................................................................................... ....... 02329200 140 Little River near Midway, FL (d)............................................................................................... .......... 02329600 96 Lake Talquin near Bloxham, FL (e) .............................................................................................. ..............02329900 141 Ochlockonee River near Bloxham, FL (d) ......................................................................................... .........02330000 97 Telogia Creek near Bristol, FL (d) ............................................................................................. .......... 02330100 98 Ochlockonee River near Smith Creek, FL (d)..................................................................................... ........02330150 99

CARRABELLE RIVER BASIN New River near Sumatra, FL (d)................................................................................................. ......... 02330400 100

## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

SURFACE-WATER STATIONS, IN DOWNSTREAM ORDER, FOR WHICH RECORDS ARE PUBLISHED IN THIS VOLUME

[Letters after station names designate type of data: (d) discharge, (q) discharge measurements only, (c) chemical, (b) biological, (m) microbiological, (s) sediment, (t) temperature, (e) elevation, gage heights, or contents]

Station Number Page



## x APALACHICOLA RIVER BASIN 

## Spring Creek near Reynoldsville, GA (d) .....................................................................................023 57150 101 Apalachicola River at Chattahoochee, FL (d,e).................................................................................. .... 0235800010 102 Apalachicola River near Blountstown, FL (d,e) .................................................................................. ....... 02358700 104 Muddy Branch near Marianna, FL (d)...........................................................................................02 358784 106 Chipola River at Marianna, FL (d) .............................................................................................. .........02358789 107 Chipola River near Altha, FL (d)............................................................................................... ...........02359000 108 Chipola River at Cockran Landing near Wewahitc hka, FL (d,e) .........................................................02359051 109 Apalachicola River near Sumatra, FL (d,e) ...................................................................................... .......... 02359170 111

ECONFINA CREEK BASIN 

## Martin Bayou at US 98 at Springfield, FL (d)................................................................................... .. 02359315 113 Econfina Creek near Bennett, FL (d)............................................................................................ .............. 02359500 114

CHOCTAWHATCHEE RIVER BASIN 

## Choctawhatchee River near Pittman, FL (d)...................................................................................... ......... 02365200 115 Wrights Creek at SH 177A near Bonifay, FL (d) .................................................................................0 2365470 116 Choctawhatchee River at Caryville, FL (d) ...................................................................................... ...........02365500 117 Bruce Creek at SH 81 near Redbay, FL (d) ....................................................................................... ...02365769 118 Choctawhatchee River near Bruce, FL (d)........................................................................................ .......... 02366500 120

ALAQUA CREEK BASIN 

## Alaqua Creek near Pleasant Ridge, FL (d) ....................................................................................... .......... 02366996 121

YELLOW RIVER BASIN 

## Yellow River near Oak Grove, FL (d) ............................................................................................ ............ 02367900 122 Yellow River at Milligan, FL (d) ............................................................................................... ................. 02368000 123 Shoal River near Mossy Head (d)................................................................................................ .........02368500 126 Shoal River near Crestview, FL (d) ............................................................................................. .........02369000 127

BLACKWATER RIVER BASIN 

## Blackwater River near Baker, FL (d)............................................................................................ .............. 02370000 128 Big Coldwater Creek near Milton, FL (d) ........................................................................................ ....02370500 129 Pond Creek near Milton, FL (d)................................................................................................. ...........02370700 130

ESCAMBIA RIVER BASIN 

## Escambia River near Century, FL (d) ............................................................................................ ............. 02375500 131 Escambia River near Molino, FL (d) ............................................................................................. ............. 02376033 132

BAYOU MARCUS CREEK BASIN 

## Bayou Marcus Creek near Pensacola, FL (d) ...................................................................................... ....... 02376100 133

ELEVENMILE CREEK BASIN 

## Elevenmile Creek near Pensacola, FL (d)........................................................................................ ........... 02376115 134

PERDIDO RIVER BASIN 

## Brushy Creek near Bratt, FL (d) ................................................................................................ ...........02376293 135 Perdido River at Barrineau Park, FL (d)........................................................................................ ............. 02376500 136

GROUND-WATER WELLS, BY COUNTY, FOR WHICH RECORDS ARE PUBLISHED IN THIS VOLUME

WAKULLA COUNTY 

## 300740084293001................................................................................................................ ....................................... 145

WASHINGTON COUNTY 

## 303025085350501................................................................................................................ ....................................... 147

## xi WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida



# DISCONTINUED SURFACE-WATER DISCHARGE STATIONS The following continuous-record surface-water discharge stations (gaging stations) in Florida have been discontinued. Daily st reamflow or stage records were collected and published for the period of record, expressed in water years, shown for each station. Thos e stations with an asterisk (*) after the station number are currently operated as crest-stage partial-record stations. Discontinued project s tations with less than 3 years of record have not been included. Information regarding these stations may be obtained from the District Office at the address given on the back side of the title page of this report.

Station name Station number Drainage area (mi 2 

## ) Period of record

Waccasassa River near Otter Creek, FL 02313500 300† 1944-53 Otter Creek at Otter Creek, FL 02314000 1945-53 Tenmile Creek near Lebanon Station. F: 02314200 26 1963-92 Rocky Creek near Belmont, FL 02314986 50 1976-83 Hunter Creek near Belmont, FL 02315005 25.4 1979-88 Deep Creek near Suwannee Valley, FL 02315200 88.6 1976-81 1990-98 Robinson Creek near Suwannee Valley, FL 02315392 27.4 1976-81 Swift Creek at Facil, FL 02315520 65.3 1976-88 Suwannee River at Suwannee Springs, FL 02315550 2630 1975-96 Santa Fe River near Graham, FL 02320700 94.9 1957-98 Swift Creek near Lake Butler, FL 02321700 46.0 1957-60

Olustee Creek near Providence, FL 02321800 163 1957-60 Pareners Branch near Bland, FL 02321900 4.5 1993-96 Santa Fe River near High Springs, FL 02322000 950 1931-71 Blues Creek near Gainesville, FL 02322016 5.12 1984-94 Cannon Creek near Lake City, FL 02322616 2.33 1992-98 Fenholloway River at Foley, FL 02324500 120 1946-92 1993-95 Aucilla River near Scanlon, FL 02326512 805 1977-97 Northeast Drainage Ditch at Weems Road, FL 02326845 17.1 1979-83 Munson Slough at Capital Circle, FL 02327017 52.9 1979-83 Little River near Quincy, FL 02329500 237 1950-91 Quincy Creek at S267 at Quincy, FL 02329534 16.8 1974-92

Quincy Creek at Quincy, FL 02329542 21.9 1974-78 Rocky Comfort Creek near Quincy, FL 02329700 9.46 1964-81 New River near Wilma, FL 02330300 81.7 1964-81 North Mosquito Creek at Chattahoochee, FL 02358500 57.9 1936-42 Apalachicola River near Wewahitchka, FL 02358754 17800 1950-96

Econfina Creek near Compass Lake, FL 02359350 40.5 1962-65 Econfina Creek near Fountain, FL 02359450 70.2 1965-78 Bear Creek near Youngstown, FL 02359550 67.2 1962-65 Seven Runs Bay near Redbay, FL 02365800 25.8 1969-70 Holmes Creek at Vernon, FL 02366000 386 1950-81

Magnolia Creek near Freeport, FL 02366900 11.2 1968-83 Alaqua Creek near DeFuniak Springs, FL 02367000 65.6 1951-78 Alaqua Creek near Portland, FL 02367006 83.7 1977-94 Rocky Creek near Portland, FL 02367240 42.4 1980-83 Rocky Creek near Niceville, FL 02367250 67.0 1966-68

## xii WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

† Includes drainage area for Otter Creek. Turkey Creek near Niceville, FL 02367305 22.7 1966-68 Turkey Creek at SR123 near Niceville, FL 02367307 30.1 1980-81 Juniper Creek at State Hwy. 85 near Niceville, FL 02367310 27.6 1966-75 1978-93
East Bay River near Wynnehaven Beach, FL 02367320 62.0 1966-68 Turkey Creek at Government RR near Niceville, FL 02367355 60.8 1977-81 Turtle Creek near Ft. Walton Beach, FL 02367388 14.3 1977 Turtle Creek near Ocean City, FL 02367390 22.3 1977-81 Baggett Creek near Milligan, FL 02368300 7.80 1965-82

Pond Creek near Dorcas, FL 02368800 94.8 1966-68 Titi Creek near Crestview, FL 02368990 62.9 1966-68 Yellow River near Holt, FL 02369500 1210 1933-41 Big Juniper Creek near Munson, FL 02370200 36.0 1958-67 West Fork Big Coldwater at Cobbtown, FL 02370300 39.5 1958-62

Pine Barren Creek near Barth, FL 02376000 75.3 1952-94 Eightmile Creek near West Pensacola, FL 02376140 11.2 1988-91 Brushy Creek near Walnut Hill, FL 02376300 49.0 1958-91 Jacks Branch near Muscogee, FL 02376700 23.2 1958-62 Station name Station number Drainage area (mi 2 

## ) Period of record

## WATER RESOURCES DATA FOR FLORIDA, 2001 1 

## Volume 4: Northwest Florida 

# INTRODUCTION
The Water Resources Division of the U.S. Geological Survey, in cooperation with State, local, and Federal agencies, obtains a large amount of data pertaining to the water resources of Florida each water year. These data, accumulated during many water years, constitute a valuable data base for developing an improved understanding of the water resources of the State. To make these data readily available to interested parties outside the Geological Survey, the data are published annually in this report series entitled “Water Resources Data - Florida.”This report series for the 2001 water year for the state of Florida consists of records for continuous or daily discharge for 387 streams, periodic discharge for 14 streams, continuous or daily stage for 147 streams, periodic stage for 2 streams, peak stage and discharge for 8 streams, continuous or daily elevations for 14 lakes, periodic elevationsfor 47 lakes, continuous ground-water levels for 429 wells, periodic ground-water levels for 1,257 wells, and qualityof-water for 112 surface-water sites and 248 wells.This volume (Volume 4, Northwest Florida) contains records of continuous or daily discharge for 65 streams, periodic discharge for 1 stream, continuous or daily stage for 18 streams, periodic stage for 2 streams, peak stage and discharge for 0 streams, continuous or daily elevations for 1 lake, periodic elevations for 1 lake, continuous ground-water levels for 2 wells, periodic ground-water levels for 3 wells, and quality-of-water for 3 surface-water sites and 0 wells. This series of annual reports for Florida began with the 1961 water year with a report that contained only data relating to the quantities of surface water. For the 1964 water year, a similar report was introduced that contained only data relating to water quality. Beginning with the l975 water year, the report format was changed to present, in one volume, data on quantities of surface water, quality of surface and ground water, and ground-water levels. Prior to introduction of this series and for several water years concurrent with it, water-resources data for Florida were published in U.S. Geological Survey Water-Supply Papers. Data on stream discharge and stage and on lake or reservoir contents and stage, through September 1960, were published annually under the title “Surface-Water Supply of the United States.” For the 1961 through 1970 water years, the data were published in two 5-year reports. Data onchemical quality, temperature, and suspended sediment for the 1941 through 1970 water years were published annually under the title “Quality of Surface Waters of the United States,” and water levels for the 1935 through 1974 water years were published under the title “Ground-Water Levels in the United States.” The above mentioned Water-SupplyPapers may be consulted in the libraries of the principal cities of the United States and may be purchased from Distribution Branch, Text products Section, U.S. Geological Survey, Branch of Information Services, Open-File Reports Section, Box 25286, Federal Center, Denver, CO 80225-00286. Publications similar to this report are published annually by the Geological Survey for all States. These official Survey reports have an identification number consisting of the two-letter State abbreviation, the last two digits of the water year, and the volume number. For example, this volume is identified as “U.S. Geological Survey Water-Data Report FL-01-4.” For archiving and general distribution, the reports for 1971-74 water years also are identified as water-data reports. These water-data reports are for sale in paper copy or in microfiche by the National Technical Information Service, U.S. Department of Commerce, Springfield, VA 22161. Additional information, including current prices, for ordering specific reports may be obtained from the Office Chief at the address given on the back of the title page or by telephone (850) 942-9500.



# COOPERATION
The U.S. Geological Survey and agencies of the State of Florida have had cooperative agreements for the collection of water-resource records since 1930. Organizations that assisted in collecting the data in this report through cooperative agreement with the Survey are: Florida Department of Environmental Protection City of Century Corps of Engineers, U.S. Army, Mobile District Florida Department of Transportation City of Perry U. S. Fish and Wildlife Service Northwest Florida Water Management District City of Tallahassee County of Santa Rosa Suwannee River Water Management District County of Okaloosa County of Walton 

# Assistance with funds or services was given by the U.S. Army Corps of Engineer, Mobile District, in collecting records for 5 hydrologic gaging stations throughout northwest Florida.

### 2 

## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida



# SUMMARY OF HYDROLOGIC CONDITIONS

Rainfall


# Rainfall across northwest Florida varied from about 2 to 16 in. below normal for the 2001 water year. Based on rainfall data at 5 National Oceanic and Atmospheric Administration stations, (Perry, Lake City, Tallahassee, De Funiak Springs, and Pensacola), total rainfall for the 12-month period ranged from 41.61 in. at Perry to 63.12 in. atTallahassee. The cumulative monthly departures for the water year ranged from -16.54 in. at Perry to -2.59 in. at Tallahassee. The distribution of rainfall differed slightly geographically and seasonally with the Big Bend area around Tallahassee receiving more than average rainfall for the spring (April-June) and summer (July-September) quarters. Heavy rainfall occurred in the Tallahassee area from Tropical Storm Allison in June and Tropical Storm Barry in August. All of the remaining areas were deficient for the entire year, except for the summer quarter (July - September) at Lake City, which received above-normal rainfall. Rainfall during the fall quarter (October-December), one of the dryer periods, ranged from near normal for Pensacola and De Funiak Springs, but 5-6 in. below normal across the Big Bend area. During the winter quarter (January-March), normally a wet period in northwest Florida, rainfall departures from normal ranged from -1.24 in. at Pensacola to -4.78 in. at Lake City. The spring quarter (April-June) departures from normal rainfall ranged from -1.28 in. at De Funiak Springs to +5.01 in. at Tallahassee. Rainfall amounts during the summer quarter (July-September), also normally a wet period, ranged from 3.27 in. below normal at Perry to 2.71 in. above normal at Lake City. The following summary lists the cumulative rainfall and departure from the 30-year normal (1961-90) for each of the stations.

Surface Water
The drought of the 2000 water year continued into 2001 for most of northwest Florida. Although flows averaged higher in 2001 than in 2000, several gages recorded their lowest annual mean flow or the lowest instantaneous low flow for their periods of record. Flows in the upper Santa Fe River, with about 16 percent of normal were the lowest, and the Sopchoppy and Escambia Rivers, with 107 percent of normal, were the highest. Generally, flows were about 40 to 75 percent of normal over northwest Florida except for the upper Santa Fe River (16 percent of normal), the upper Suwannee River (about 26 percent of normal), the Escambia River (about 105 percent of normal), and the Sopchoppy River (107 percent of normal ).The gage at Santa Fe River near Ft. White, 02322500, recorded the lowest annual mean flow, 624 cfs, for its period of record, 1928-2001, and an instantaneous low flow of 464 cfs on Jan. 27, 2001. The gage at St. Marks River near Newport (02326900) recorded the lowest instantaneous flow in its 1964-2001 period of record, 292 cfs on Sept. 30, 2001. The gage at Econfina Creek near Bennet, 02359500, recorded the lowest annual mean flow, 363 cfs, for the period 1936-2001, and an instantaneous low flow of 250 cfs on May 28, 2001. Additionally, several stations in the western panhandle recorded their instantaneous low flows for their periods of record in Oct.-Nov. 2000: Choctawhatchee River near Caryville (02365500), 500 cfs on Oct. 30; Blackwater River near Baker (02370000), 57 cfs on Oct. 29; Escambia River near Century (02375500), 452 cfs on Oct. 31; Escambia River near Molino (02376033), 581 cfs on Nov. 6.

Discharge hydrographs for some representative streams in northwest Florida are shown in figures 2 through 8. The upper graph (A) shows the 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the previous period of record at that site. The lower graph (B) shows the monthly mean discharge for the period 1992-2001. Cumulative rainfall and departure from the 30-year normal (1961-90)

Station October - December January - March April - June July - September Water Year

Total Rain Departure Total Rain Departure Total Rain Departure Total Rain Departure Total Rain Departure

Perry 2.51 -6.20 9.50 -3.78 10.36 -3.29 19.24 -3.27 41.61 -16.54 Lake City 2.67 -5.58 8.27 -4.78 8.16 -6.08 22.66 2.71 41.76 -13.73
Tallahassee 6.50 -5.32 11.88 -4.66 20.43 5.01 24.31 2.38 63.12 -2.59 De Funiak Springs 13.35 .74 13.23 -3.54 13.38 -1.28 21.57 -1.31 61.53 -5.39
Pensacola 12.16 .12 14.47 -1.24 9.48 -4.89 17.01 -3.12 53.12 -9.13

## WATER RESOURCES DATA FOR FLORIDA, 2001 3 

## Volume 4: Northwest Florida



# Ground Water
A hydrograph for the USGS well near Wausau is shown in figure 9. The upper graph (A) shows the 2001 monthly maximum water level compared to the maximum, minimum, and mean monthly maximum water level for the period 1963-2001. The lower graph (B) shows the monthly maximum water level for the period 1998-2001. Water levels declined steadily from October to June, reaching a record low elevation of 47.33 ft. NGVD 1929 on June 10.

Water Quality
Water-quality data were not collected in north Florida during the water year to provide any analysis of conditions that exist in the area.

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## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

Figure 2. Santa Fe River near Worthington Springs (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1932-2001, an d (B) the monthly mean discharge for the period 1992-2001.DISCHARGE, IN CUBIC FEET PER SECOND 

# SANTA FE RIVER NEAR WORTHINGTON SPRINGS, FLORIDA

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 0.01 0.02 0.05

0.1 0.2 0.5 1 2 5 10 20 50 100 200 500 1000 2000 5000 10000 MAXIMUM

MEAN

MINIMUM

Zero flow occurred in May and June 2001



# 1992 1994 1996 1998 2000 YEAR 0 1000 2000 3000 4000 5000 

# A

B WATER YEAR 

# 2001 WATER YEAR

## WATER RESOURCES DATA FOR FLORIDA, 2001 5 

## Volume 4: Northwest Florida

Figure 3. Suwannee River at Branford (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1931-2001, and (B) the monthly mean discharge for the period 1992-2001.DISCHARGE, IN CUBIC FEET PER SECOND 

# SUWANNEE RIVER AT BRANFORD, FLORIDA

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

WATER YEAR 1000 2000 5000 10000 20000 50000 MAXIMUM

MEAN

MINIMUM

1992 1994 1996 1998 2000 0 5000 10000 15000 20000 25000 30000 35000 40000 

# A

B

YEAR 

# 2001 WATER YEAR

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## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

Figure 4. Steinhatchee River near Cross City (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1950-2001, and (B) the monthly mean discharge for the period 1992-2001.DISCHARGE, IN CUBIC FEET PER SECOND 

# STEINHATCHEE RIVER NEAR CROSS CITY, FLORIDA

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep

WATER YEAR 1 2 5 10 20 50 100 200 500 1000 2000 5000

MAXIMUM

MEAN

MINIMUM

1992 1994 1996 1998 2000 -250 0 250 500 750 1000 1250 1500 1750 2000 2250 2500 

# A

B

YEAR 

# 2001 WATER YEAR

## WATER RESOURCES DATA FOR FLORIDA, 2001 7 

## Volume 4: Northwest Florida

Figure 5. Ochlockonee River near Havana (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1926-2001, and (B) the monthly mean discharge for the period 1992-2001. 

# OCHLOCKONEE RIVER NEAR HAVANA, FLORIDA

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 10 20 50 100 200 500 1000 2000 5000 10000

MAXIMUM

MEAN

MINIMUM

1992 1994 1996 1998 2000 WATER YEAR

0 1000 2000 3000 4000 5000 6000 7000 8000 

# A

B

YEAR 

# 2001 WATER YEAR

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## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

Figure 6. Chipola River near Altha (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1943-2001, and (B) the monthly mean discharge for the period 1992-2001. 

## WATER YEARDISCHARGE, IN CUBIC FEET PER SECOND 

# CHIPOLA RIVER NEAR ALTHA, FLORIDA

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 100 200 500 1000 2000 5000 10000

MAXIMUM

MEAN

MINIMUM

1992 1994 1996 1998 2000 0 1000 2000 3000 4000 5000 6000 

# A

B

YEAR 

# 2001 WATER YEAR

## WATER RESOURCES DATA FOR FLORIDA, 2001 9 

## Volume 4: Northwest Florida

Figure 7. Shoal River near Crestview (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1938-2001, and (B) the monthly mean discharge for the period 1992-2001.DISCHARGE, IN CUBIC FEET PER SECOND



## WATER YEAR 

# SHOAL RIVER NEAR CRESTVIEW, FLORIDA

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 100 200 500 1000 2000 5000 10000

MAXIMUM

MEAN

MINIMUM

1992 1994 1996 1998 2000 0 1000 2000 3000 4000 5000 6000



# B A

YEAR 

# 2001 WATER YEAR

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## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

Figure 8. Escambia River near Century (A) 2001 monthly mean discharge compared to the maximum, minimum, and mean monthly mean discharge for the period 1934-2001, and (B) the monthly mean discharge for the period 1992-2001. 

## WATER YEAR 

# ESCAMBIA RIVER NEAR CENTURY, FLORIDA

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 500 1000 2000 5000 10000 20000 50000 MAXIMUM

MEAN

MINIMUM

1992 1994 1996 1998 2000 0 5000 10000 15000 20000 25000 30000 35000 

# A

B

YEAR 

# 2001 WATER YEAR

## WATER RESOURCES DATA FOR FLORIDA, 2001 11 

## Volume 4: Northwest Florida

Figure 9. USGS Well near Wausau (A) Monthly maximum water level for the 2001 water year compared to maximum, minimum, and mean monthly maximum water levels for the period 1963-2001 and (B) the monthly maximum water level for the period 1998-2001. 

## WATER YEAR 

# USGS WELL NEAR WAUSAU, FLORIDA

Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep 42 44 46 48 50 52 54 56 58 60 62 64 66 68 MAXIMUM

MEAN

MINIMUM

OND 1998 J FMAM J J A SOND 1999 J FMAM J J A SOND 2000 J FMAMJ J ASOND 2001 J FMAM J J A S 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 

# A

B

YEAR 

# 2001 WATER YEARELEVATION (FEET NGVD)

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## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida 

# SPECIAL NETWORKS AND PROGRAMS

Hydrologic Benchmark Network is a network of 50 sites in small drainage basins around the country whose purpose is to provide consistent data on the streamflow representative undeveloped watersheds nationwide, and to provide analyses on a continuing basis to compare and contrast conditions observed in basins more obviously affectedby human activities. At 10 of these sites, water-quality information is being gathered on major ions and nutrients, primarily to assess the affects of acid deposition on stream chemistry. Additional information on the Hydrologic Benchmark Program can be found at http://water.usgs.gov/hbn/.
National Stream-Quality Accounting Network (NASQAN) monitors the water quality of large rivers within the Nation’s largest river basins. From 1995 through 1999, a network of approximately 40 stations were operated in the Mississippi, Columbia, Colorado, and Rio Grande. From 2000 through 2004, sampling was reduced to a few index stations on the Colorado and Columbia so that a network of 5 stations could be implemented on the Yukon River. Samples are collected with sufficient frequency that the flux of a wide range of constituents can be estimated. The objective of NASQAN is to characterize the water quality of these large rivers by measuring concentration and masstransport of a wide range of dissolved and suspended constituents, including nutrients, major ions, dissolved and sediment-bound heavy metals, common pesticides, and inorganic and organic forms of carbon. This information will be used (1) to describe the long-term trends and changes in concentration and transport of these constituents; (2) to test findings of the National Water-Quality Assessment Program (NAWQA); (3) to characterize processes unique to large-river systems such as storage and re-mobilization of sediments and associated contaminants; and (4) to refine existing estimates of off-continent transport of water, sediment, and chemicals for assessing human effects on the world’s oceans and for determining global cycles of carbon, nutrients, and other chemicals. Additional information about the NASQAN Program can be found at http://water.usgs.gov/nasqan/.
The National Atmospheric Deposition Program/National Trends Network (NADP/NTN) provides continuous measurement and assessment of the chemical constituents in precipitation throughout the United States. As the lead federal agency, the USGS works together with over 100 organizations to provide a long-term, spatial and temporalrecord of atmospheric deposition generated from a network of 225 precipitation chemistry monitoring sites. This longterm, nationally consistent monitoring program, coupled with ecosystem research, provides critical informationtoward a national scorecard to evaluate the effectiveness of ongoing and future regulations intended to reduce atmospheric emissions and subsequent impacts to the Nation’s land and water resources. Reports and other information on the NADP/NTN Program, as well as all data from the individual sites, can be found at http://bqs.usgs.gov/acidrain/.
The National Water-Quality Assessment (NAWQA) Programof the U.S. Geological Survey is a long-term program with goals to describe the status and trends of water-quality conditions for a large, representative part of the Nation’s ground- and surface-water resources; provide an improved understanding of the primary natural and humanfactors affecting these observed conditions and trends; and provide information that supports development and evaluation of management, regulatory, and monitoring decisions by other agencies.
Assessment activities are being conducted in 59 study units (major watersheds and aquifer systems) that represent a wide range of environmental settings nationwide and that account for a large percentage of the Nation’s water use. A wide array of chemical constituents will be measured in ground water, surface water, streambed sediments, and fish tissues. The coordinated application of comparative hydrologic studies at a wide range of spatial and temporal scaleswill provide information for decision making by water-resources managers and a foundation for aggregation and comparison of findings to address water-quality issues of regional and national interest.
Communication and coordination between USGS personnel and other local, State, and federal interests are critical components of the NAWQA Program. Each study unit has a local liaison committee consisting of representatives from key federal, State, and local water resources agencies, Indian nations, and universities in the study unit. Liaison committees typically meet semiannually to discuss their information needs, monitoring plans and progress, desired information products, and opportunities to collaborate efforts among the agencies. Additional information about the NAWQA Program can be found at http://water.usgs.gov/nawqa/nawqa_home.html

## WATER RESOURCES DATA FOR FLORIDA, 2001 13 

## Volume 4: Northwest Florida 

# EXPLANATION OF THE RECORDS
The surface-water and ground-water records published in this report are for the 2001 water year that began October 1, 2000, and ended September 30, 2001. A calendar of the water year is provided on the inside of the front cover. The records contain streamflow data, stage and content data for lakes and reservoirs, water-quality data for surface and ground water, and ground-water-level data. The following sections of the introductory text are presented to provide users with a more detailed explanation of how the hydrologic data published in this report were collected, analyzed, computed, and arranged for presentation.



# Station Identification Numbers

Each data station, whether streamsite or well, in this report is assigned a unique identification number. The number usually is assigned when a station is first established and is retained for that station indefinitely. The systems used by the U.S. Geological Survey to assign identification numbers for surface-water stations and for ground-water wellsites differ, but both are based on geographic location. The “downstream order” system is used for regular surfacewater stations and the “latitude-longitude” system is used for wells and for surface-water stations where only miscellaneous measurements are made.

Downstream Order System



# Since October 1, 1950, the order of listing hydrologic-station records in Survey reports is in a downstream direction along the main stream. All stations on a tributary entering upstream from a mainstream station are listed before that station. A station on a tributary that enters between two mainstream stations is listed between them. A similar order is followed in listing stations on first rank, second rank, and other ranks of tributaries. The rank of any tributary with respect to the stream to which it is immediately tributary is indicated by an indention in the “List of Stations” in the front of this report. Each indention represents one rank. This downstream order and system of indention shows which stations are on tributaries between any two stations and the rank of the tributary on which each station is situated. The station-identification number is assigned according to downstream order. In assigning station numbers, no distinction is made between partial-record stations and other stations; therefore, the station number for a partial-record station indicates downstream-order position in a list made up of both types of stations. Gaps are left in the series of numbers to allow for new stations that may be established; hence, the numbers are not consecutive. The complete number for each station, such as 02326500, which appears just to the left of the station name, includes the two-digit Part number “02” plus the 6 to 13 digit downstream-order number “326500.” The part number refers to an area whose boundaries coincide with natural drainage lines; for example, Part “02” is the South Atlantic Slope and eastern Gulf of Mexico basins.

Latitude-Longitude System


# The identification numbers for wells and miscellaneous surface-water sites are assigned according to the grid system of latitude and longitude. The number consists of 15 digits. The first six digits denote the degrees, minutes, and seconds of latitude, the next seven digits denote degrees, minutes, and seconds of longitude, and the last two digits (assigned sequentially) identify the wells or other sites within a 1-second grid. This site-identification number, once assigned, is a unique number and has no locational significance. In the rare instance where the initial determination of latitude and longitude are found to be in error, the station will retain its initial identification number; however, its true latitude and longitude will be listed in the LOCATION paragraph of the station description. (See figure 10, page 14.)


# Records of Stage and Water Discharge

Records of stage and water discharge may be complete or partial. Complete records of discharge are those obtained using a recording device through which either instantaneous or mean daily discharges may be computed for any period of time. Complete records of lake or reservoirs, similarly, are those for which stage or content may be

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## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida



# computed for any period of time. They may be obtained using a recording device or daily readings. Because daily mean discharges or elevations commonly are published for such stations, they are referred to as “daily stations.” Location of all complete-record stations for which data are given in this report are shown in figures preceding each sub-basin.By contrast, partial records are obtained through discrete measurements without using a continuous stage-recording device and pertain only to a few flow characteristics, or perhaps only one. Records of miscellaneous discharge measurements or of measurements from special studies, such as low-flow seepage studies, may be considered as partial records. The nature of the partial record is indicated by table titles such as “Crest-stage partial records,” or “Low-flow partial records.”

Data Collection and Computation



# The base data collected at gaging stations consist of records of gage heights and measurements of discharge of streams or canals, and stage, surface area, and contents of lakes or reservoirs. In addition, observations of factors affecting the stage-discharge relation or the stage-capacity relation, weather records, and other information are used to supplement base data in determining the daily flow or volume of water in storage. Records of gage height are obtained from either direct readings on a nonrecording gage or from a water-stage recorder that gives the fluctuations on a paper tape punched at selected time intervals. Measurements of discharge are made with a current meter, using the general methods adopted by the Geological Survey. These methods are described in standard textbooks, in Water-Supply Paper 2175, and in U.S. Geological Survey Techniques of Water Resources Investigations, book 3, chapter A6.For stream-gaging stations, rating tables giving the discharge for any gage height are prepared from stage-discharge relation curves. If extensions to the rating curves are necessary to define the extremes of discharge, they are made on the basis of indirect measurements of peak discharge; such as slope-area, contracted opening measurements, computations of flow over dams or weirs, step backwater techniques, velocity-area studies, and logarithmic plotting.The daily mean discharge is computed from gage heights and rating tables, then the monthly and yearly mean discharges are computed from the daily figures. If the stage-discharge relation was subjected to change because of occasional or continual change in the physical features of the control, the daily mean discharge is computed by the shiftingcontrol method, in which correction factors based on individual discharge measurements and notes by the technician are used in applying the gage-height corrections to the rating tables. If the stage-discharge relation for a station is temporarily changed by the presence of aquatic growth or debris on the control, the daily mean discharge is computed by the same method. At some stream-gaging stations the stage-discharge relation is affected by backwater from streams, tides, or other sources. This necessitates the use of the slope method in which the slope or fall in a reach of the stream is a factor in A C

D

E

B 

### 30°42′15′′

14′′

30°42′13′′ 83°19′39′′ 38′′ 83°19′37′′ 

### Coordinates for miscellaneou s site "C" (304214083193701 )

Coordinates for well "A"

(304213083193701) and miscellaneous site "B" (304213083193702) C oordinates for wells

"D" (304213083193801) and "B" (304213083193802)



## Figure 10. System for numbering wells and miscellaneous sites (latitude and longitude).

## WATER RESOURCES DATA FOR FLORIDA, 2001 15 

## Volume 4: Northwest Florida 

# determining discharge. The slope or fall is obtained by means of an auxiliary gage set at some distance from the base gage. At some stations the stage-discharge relation is affected by a rapid change in stage; at these stations the rate of change in stage is used as a factor in determining discharge. At some stations there is no relation between stage and discharge because of the flat stream gradients and/or tidal fluctuations. Discharge is determined from ratings which are based on a relation between recorded velocity index unitat a fixed point and mean velocity at a fixed measuring section, and a relation between recorded stage and cross-sectional area at the measuring site. For some gaging stations there are periods when no gage-height record is obtained or the recorded gage height is so faulty that it cannot be used to compute daily discharge. This happens when the recorder stops or otherwise failsto operate properly, intakes are plugged, or for various other reasons. For such periods the daily discharges are estimated on the basis of recorded range in stage, adjoining good record, discharge measurements, weather records, and comparison with other station records from the same or nearby basins. Likewise, daily contents may be estimated on the basis of operator’s log, prior and subsequent records, inflow-outflow studies, and other information. The data in this report generally comprise a description of the station and tabulations of daily and monthly figures. For gaging stations on streams or canals a table showing the daily discharge and monthly and yearly discharge is given. For gaging stations on lakes and reservoirs a monthly summary table of stage and contents or a table showing the daily contents is given. Tables of daily mean gage heights are included for some streamflow stations. Records are published for the water year, which begins on October l and ends on September 30.

Data Presentation



# Streamflow data in this report are presented in a new format that is considerably different from the format in data reports prior to the 1991 water year. The major changes are that statistical characteristics of discharge now appear intabular summaries following the water-year data table and less information is provided in the text or station manuscript above the table. These changes represent the results of a pilot program to reformat the annual water-data report to meet current user needs and data preferences. The records published for each continuous-record surface-water discharge station (gaging station) now consist of four parts, the manuscript or station description; the data table of daily mean values of discharge for the current water year with summary data; a tabular statistical summary of monthly mean flow data for a designated period, by water year; and a summary statistics table that includes statistical data of annual, daily, and instantaneous flows as well as data pertaining to annual runoff, 7-day low-flow minimums, and flow duration.
Station Manuscript
The manuscript provides, under various headings, descriptive information, such as station location; period ofrecord; historical extremes outside the period of record; record accuracy; and other remarks pertinent to station operation and regulation. The following information, as appropriate, is provided with each continuous record of dischargeor lake content. Comments to follow clarify information presented under the various headings of the station description.
LOCATION.--Information on locations is obtained from the most accurate maps available. The location of the gaging station with respect to the cultural and physical features in the vicinity and with respect to the reference place mentioned in the station name is given. River mileages, given for only a few stations, were determined by methods given in “River Mileage Measurement,” Bulletin 14, Revision of October 1968, prepared by the Water Resources Council or were provided by the U.S. Army Corps of Engineers.
DRAINAGE AREA.--Drainage areas are measured using the most accurate maps available. Because the type of maps available varies from one drainage basin to another, the accuracy of drainage areas likewise varies. Drainage areas are updated as better maps become available.
PERIOD OF RECORD.--This indicates the period for which records have been published for the station or for an equivalent station. An equivalent station is one that was in operation at a time that the present station was not and

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## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida 

# whose location was such that flow at it can reasonably be considered equivalent to flow at the present station.
REVISED RECORDS.--Published records, because of new information, occasionally are found to be incorrect, and revisions are printed in later reports. Listed under this heading are all the reports in which revisions have been published for the station and the water years to which the revisions apply. If a revision did not include daily, monthly, or annual figures of discharge, that fact is noted after the year dates as follows: “(M)” means that only the instantaneous maximum discharge was revised; “(m)” that only the instantaneous minimum was revised; and “(P)” that only peak discharges were revised. If the drainage area has been revised, the report in which the most recently revised figure was first published is given.
GAGE.--The type of gage in current use, the datum of the current gage referred to National Geodetic Vertical Datum of 1929 (see Definition of Terms, page 25), and a condensed history of the types, locations, and datums of previous gages are given under this heading.
REMARKS.--All periods of estimated daily-discharge will either be identified by date in this paragraph of the station description for water-discharge stations or flagged in the daily discharge table. (See next section, “Identifying Estimated Daily Discharge.”) If a REMARKS paragraph is used to identify estimated record, the paragraph will begin with this information presented as the first entry. The paragraph is also used to present information relative to the accuracy of the records, to special methods of computation, and to conditions that affect natural flow at the station. In addition, information may be presented pertaining to average discharge data for the period of record; to extremes data for the period of record and the current year; and, possibly, to other pertinent items. For reservoir stations, information is given on the dam forming the reservoir, the capacity, outlet works and spillway, and purpose and use of the reservoir.
COOPERATION.--Records provided by a cooperating organization or obtained for the Geological Survey by a cooperating organization are identified here.
EXTREMES OUTSIDE PERIOD OF RECORD.--Included here is information concerning major floods or unusually low flows that occurred outside the stated period of record. The information may or may not have been obtained by the U.S. Geological Survey.
REVISIONS.--If a critical error in published records is discovered, a revision is included in the first report published following discovery of the error.

Although rare, occasionally the records of a discontinued gaging station may need revision. Because, for these stations, there would be no current or, possibly, future station manuscript published to document the revision in a “Revised Records” entry, users of data for these stations who obtained the record from previously published data reports may wish to contact the District Office (address given on the back of the title page of this report) to determine if the published records were ever revised after the station was discontinued. Of course, if the data for a discontinued station were obtained by computer retrieval, the data would be current and there would be no need to check because any published revision of data is always accompanied by revision of the corresponding data in computer storage. Manuscript information for lake or reservoir stations differs from that for stream stations in the nature of the “Remarks” and in the inclusion of a skeleton stage-capacity table when daily contents are given. Headings for AVERAGE DISCHARGE, EXTREMES FOR PERIOD OF RECORD, AND EXTREMES FORCURRENT YEAR have been deleted and the information contained in these paragraphs, except for the listing of secondary instantaneous peak discharges in the EXTREMES FOR CURRENT YEAR paragraph, is now presented in the tabular summaries following the discharge table or in the REMARKS paragraph, as appropriate. No changes have been made to the data presentations of lake contents.
Data Table of Daily Mean Values The daily table of discharge records for stream-gaging stations gives mean discharge for each day of the water year. In the monthly summary for the table, the line headed “TOTAL” gives the sum of the daily figures for each month; the line headed “MEAN” gives the average flow in cubic feet per second for the month; and the lines headed “MAX” and “MIN” give the maximum and minimum daily discharges, respectively, for each month. Discharge for

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## Volume 4: Northwest Florida 

# the month also is usually expressed in cubic feet per second per square mile (line headed “CFSM”), or in inches (line headed “IN.”), or in acre-feet (line headed “AC-FT”). Figures for cubic feet per second per square mile and runoff in inches or in acre-feet may be omitted if there is extensive regulation or diversion or if the drainage area includes largenoncontributing areas. At some stations monthly and (or) yearly observed discharges are adjusted for reservoir storage or diversion, or diversion data or reservoir contents are given. These figures are identified by a symbol and corresponding footnote.

Statistics of Monthly Mean Data
A tabular summary of the mean (line headed “MEAN”), maximum (line headed “MAX”), and minimum (line headed “MIN”) of monthly mean flows for each month for a designated period is provided below the mean values table. The water years of the first occurrence of the maximum and minimum monthly flows are provided immediately below those figures. The designated period will be expressed as “FOR WATER YEARS _____-_____, BY WATER YEAR (WY),” and will list the first and last water years of the range of years selected from the PERIOD OF RECORDparagraph in the station manuscript. It will consist of all of the station record within the specified water years, inclusive, including complete months of record for partial water years, if any, and may coincide with the period of record for the station. The water years for which the statistics are computed will be consecutive, unless a break in the station record is indicated in the manuscript.
Summary Statistics
A table titled “SUMMARY STATISTICS” follows the statistics of monthly mean data tabulation. This table consists of four columns, with the first column containing the line headings of the statistics being reported. The table provides a statistical summary of yearly, daily, and instantaneous flows, not only for the current water year but also for the previous calendar year and for a designated period, as appropriate. The designated period selected, “WATER YEARS ____-____,” will consist of all of the station record within the specified water years, inclusive, including complete months of record for partial water years, if any, and may coincide with the period of record for the station.The water years for which the statistics are computed will be consecutive, unless a break in the station record is indicated in the manuscript. All of the calculations for the statistical characteristics designated ANNUAL (see line headings below), except for the “ANNUAL 7-DAY MINIMUM” statistic, are calculated for the designated period using complete water years. The other statistical characteristics may be calculated using partial water years.The date or water year, as appropriate, of the first occurrence of each statistic reporting extreme values of discharge is provided adjacent to the statistic. Repeated occurrences may be noted in the REMARKS paragraph of themanuscript or in footnotes. Because the designated period may not be the same as the station period of record published in the manuscript, occasionally the dates of occurrence listed for the daily and instantaneous extremes in the designated-period column may not be within the selected water years listed in the heading. When this occurs, it will be noted in the REMARKS paragraph or in footnotes. Selected streamflow duration curve statistics and runoff data are also given. Runoff data may be omitted if there is extensive regulation or diversion of flow in the drainage basin. The following summary statistics data, as appropriate, are provided with each continuous record of discharge. Comments to follow clarify information presented under the various line headings of the summary statistics table. ANNUAL TOTAL.--The sum of the daily mean values of discharge for the year. At some stations the annual total discharge is adjusted for reservoir storage or diversion. The adjusted figures are identified by a symbol and corresponding footnotes. ANNUAL MEAN.--The arithmetic mean of the individual daily mean discharges for the year noted or for the designated period. At some stations the yearly mean discharge is adjusted for reservoir storage or diversion. The adjusted figures are identified by a symbol and corresponding footnotes. HIGHEST ANNUAL MEAN.--The maximum annual mean discharge occurring for the designated period. LOWEST ANNUAL MEAN.--The minimum annual mean discharge occurring for the designated period. HIGHEST DAILY MEAN.--The maximum daily mean discharge for the year or for the designated period. LOWEST DAILY MEAN.--The minimum daily mean discharge for the year or for the designated period.

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## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida 

# ANNUAL 7-DAY MINIMUM.--The lowest mean discharge for 7 consecutive days for a calendar year or a water year. Note that most low-flow frequency analyses of annual 7-day minimum flows use a climatic year (April 1-March 31). The date shown in the summary statistics table is the initial date of the 7-day period. (This value should not be confused with the 7-day 10-year low-flow statistic.) INSTANTANEOUS PEAK FLOW.--The maximum instantaneous discharge occurring for the water year or for the designated period. Note that secondary instantaneous peak discharges above a selected base discharge are stored in District computer files for stations meeting certain criteria. Those discharge values may be obtained by writing to the District Office. (See address on back of title page of this report.) INSTANTANEOUS PEAK STAGE.--The maximum instantaneous stage occurring for the water year or for the designated period. If the dates of occurrence for the instantaneous peak flow and instantaneous peak stage differ, the REMARKS paragraph in the manuscript or a footnote may be used to provide further information. INSTANTANEOUS LOW FLOW.--The minimum instantaneous discharge occurring for the water year or for the designated period.
ANNUAL RUNOFF.--Indicates the total quantity of water in runoff for a drainage area for the year. Data reports may use any of the following units of measurement in presenting annual runoff data: Acre-foot (AC-FT) is the quantity of water required to cover 1 acre to a depth of 1 foot and is equivalent to 43,560 cubic feet or about 326,000 gallons or 1,233 cubic meters. Cubic feet per second per square mile (CFSM) is the average number of cubic feet of water flowing per second from each square mile of area drained, assuming the runoff is distributed uniformly in time and area. Inches (INCHES) indicates the depth to which the drainage area would be covered if all the runoff for a given period were uniformly distributed on it. 10 PERCENT EXCEEDS.--The discharge that is exceeded 10 percent of the time for the designated period. 50 PERCENT EXCEEDS.--The discharge that is exceeded 50 percent of the time for the designated period. 90 PERCENT EXCEEDS.--The discharge that is exceeded 90 percent of the time for the designated period.
Data collected at partial-record stations follow the information for continuous-record sites. Data for partial-recorddischarge stations are presented in two tables. The first is a table of annual maximum stage and discharge at creststage stations, and the second is a table of discharge measurements at low-flow partial-record stations. The tables of partial-record stations are followed by a listing of discharge measurements made at sites other than continuous-record or partial-record stations. These measurements are generally made in times of drought or flood to give better areal coverage to those events. Those measurements and others collected for some special reason are called measurements at miscellaneous sites.

Accuracy of the Records 

# The accuracy of streamflow records depends primarily on: (1) The stability of the stage-discharge relation or, ifthe control is unstable, the frequency of discharge measurements; and (2) the accuracy of measurements of stage, measurements of discharge, and interpretation of records. The accuracy attributed to the records is indicated under “REMARKS.” “Excellent” means that about 95 percentof the daily discharges are within 5 percent of their true values; “good,” within 10 percent; and “fair,” within 15 percent. Records that do not meet the criteria mentioned are rated “poor.” Different accuracies may be attributed to different parts of a given record. Daily mean discharges in this report are given to the nearest hundredth of a cubic foot per second (ft 3 

# /s) for values less than 1 ft 3 

# /s; to the nearest tenth between 1.0 and 10 ft 3 

# /s; to whole numbers between 10 and 1,000 ft 3 

# /s; and to 3 significant figures for more than 1,000 ft 3 

# /s. The number of significant figures used is based solely on the magnitude of the discharge value. Discharge at many stations, as indicated by the monthly mean, may not reflect natural runoff due to the effects of diversion, consumption, regulation by storage, increase or decrease in evaporation due to artificial causes, or to other factors. For such stations, figures of cubic feet per second per square mile and of runoff, in inches, are not published unless satisfactory adjustments can be made for diversions, for changes in contents of reservoirs, or for other changes

## WATER RESOURCES DATA FOR FLORIDA, 2001 19 

## Volume 4: Northwest Florida 

# incident to use and control. Evaporation from a reservoir is not included in the adjustments for changes in reservoir contents, unless it is so stated. Even at those stations where adjustments are made, large errors in computed runoff may occur if adjustments or losses are large in comparison with the observed discharge.

Other Records Available

# Information used in the preparation of the records in this publication, such as discharge measurement notes, gageheight records, temperature measurements, and rating tables is on file in the Tallahassee office of the Florida District.Also, most of the daily mean discharges are in computer-readable form and have been analyzed statistically. Information on the availability of the unpublished information or on the results of statistical analyses of the published records may be obtained from the offices whose addresses are given on the back of the title page of this report.



# Records of Surface-Water Quality

Records of surface-water quality ordinarily are obtained at or near stream-gaging stations because interpretation of records of surface-water quality nearly always requires corresponding discharge data. Records of surface-water quality in this report may involve a variety of types of data and measurement frequencies.

Classification of Records



# Water-quality data for surface-water sites are grouped into one of three classifications. A continuing-record station is a site where data are collected on a regularly scheduled basis. Frequency may be once or more times daily, weekly, monthly, or quarterly. A partial-record station is a site where limited water-quality data are collected systematically over a period of years. Frequency of sampling is usually less than quarterly. A miscellaneous sampling site is a location other than a continuing or partial-record station where random samples are collected to give better areal coverage to define water-quality conditions in the river basin.

Arrangement of Records



# Water-quality records collected at a surface-water daily record station are published immediately following that record, regardless of the frequency of sample collection. Station number and name are the same for both records. Where a surface-water daily record station is not available or where the water quality differs significantly from that at the nearby surface-water station, the continuing water-quality record is published with its own station number and name in the regular downstream-order sequence. Water-quality data for partial-record stations and for miscellaneous sampling sites appear in separate tables following the table of discharge measurements at miscellaneous sites.

Onsite Measurements and Sample Collection



# In obtaining water-quality data, a major concern is assuring that the data obtained represents the quality of the water in its natural state. To assure this, certain measurements, such as water temperature, pH, and dissolved oxygen,need to be made onsite when the samples are taken. To assure that measurements made in the laboratory also represent the natural water, carefully prescribed procedures need to be followed in collecting the samples, in treating the samples to prevent changes in quality pending analysis, and in shipping the samples to the laboratory. Procedures for onsite measurements and for collecting, treating, and shipping samples are given in publications on “Techniques of Water-Resources Investigations,” Book 1, Chap. D2; Book 3, Chap. C2; Book 5, Chap. A1, A3, and A4. Also, detailed information on collecting, treating, and shipping samples may be obtained from the Geological Survey. One sample can define adequately the water quality at a given time if the mixture of solutes throughout the stream cross section is homogeneous. However, the concentration of solutes at different locations in the cross section may

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## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida 

# vary widely with different rates of water discharge, depending on the source of material and the turbulence and mixing of the stream. Some streams must be sampled through several vertical sections to obtain a representative sample needed for an accurate mean concentration and for use in calculating load. All samples obtained for the National Stream Quality Accounting Network (see Definition of Terms, page 24) are obtained from at least several verticals. Whether samples are obtained from the centroid of flow or from several verticals depends on flow conditions and other factors which must be evaluated by the collector. Chemical-quality data published in this report are considered to be the most representative values available for the stations listed. The values reported represent water-quality conditions at the time of sampling as much as possible,consistent with available sampling techniques and methods of analysis. In the rare case where an apparent inconsistency exists between a reported pH value and the relative abundance of carbon dioxide species (carbonate and bicarbonate), the inconsistency is the result of a slight uptake of carbon dioxide from the air by the sample between measurement of pH in the field and determination of carbonate and bicarbonate in the laboratory.

Sediment


# Suspended-sediment concentrations are determined from samples collected by using depth-integrating samplers. Samples usually are obtained at several verticals in the cross section, or a single sample may be obtained at a fixed point and a coefficient applied to determine the mean concentration in the cross sections.In addition to the records of suspended-sediment discharge, records of the periodic measurements of the particlesize distribution of the suspended sediment and bed material are included for some stations.

Laboratory Measurements


# Sediment samples, samples for biochemical-oxygen demand (BOD), samples for indicator bacteria, and dailysamples for specific conductance are analyzed locally. All other samples are analyzed in the Geological Survey laboratory in Arvada, Colorado. Methods used in analyzing sediment samples and computing sediment records are given in TWRI, Book 5, Chap. C1. Methods used by the Geological Survey laboratory are given in TWRI, Book 1, Chap. D2; Book 3, Chap. C2; Book 5, Chap. A1, A3, and A4.

Data Presentation


# Information pertinent to the history of station operation is provided in descriptive headings preceding the tabulardata. These descriptive headings give details regarding location, drainage area, period of record, type of data available, instrumentation, general remarks, cooperation, and extremes for parameters currently measured daily. Tablesof chemical, physical, biological, radiochemical data, and so forth, obtained at a frequency less than daily are presented first. Tables of “daily values” of specific conductance, pH, water temperature, dissolved oxygen, and suspended sediment then follow in sequence.In the descriptive headings, if the location is identical to that of the discharge gaging station, neither the LOCATION nor the DRAINAGE AREA statements are repeated. The following information, as appropriate, is provided with each complete-record station. Comments that follow clarify information presented under the various headings of the station description.

Manuscript


# LOCATION.--See Data Presentation under “Records of Stage and Water Discharge;” same comments apply.
DRAINAGE AREA.--See Data Presentation under “Records of Stage and Water Discharge;” same comments apply.
PERIOD OF RECORD.--This indicates the periods for which there are published water-quality records for the station. The periods are shown separately for records of parameters measured daily or continuously and those measured less than daily. For those measured daily or continuously, periods of record are given for the parameters individually.
INSTRUMENTATION.--Information on instrumentation is given only if a water-quality monitor, sediment pumping

## WATER RESOURCES DATA FOR FLORIDA, 2001 21 

## Volume 4: Northwest Florida 

# sampler, or other sampling device is in operation at a station.
REMARKS.--Remarks provide added information pertinent to the collection, analysis, or computation of the records.
COOPERATION.--Records provided by a cooperating organization or obtained for the Geological Survey by a cooperating organization are identified here.
EXTREMES.--Maximums and minimums are given only for parameters measured daily or more frequently. None are given for parameters measured weekly or less frequently, because the true maximums or minimums may not have been sampled. Extremes, when given, are provided for both the period of record and for the current water year.
REVISIONS.--If errors in published water-quality records are discovered after publication, appropriate updates are made to the Water-Quality File in the U.S. Geological Survey’s computerized data system, WATSTORE, and subsequently by monthly transfer of update transactions to the U.S. Environmental Protection Agency’s STORET system. Potential users of U.S. Geological Survey water-quality data are encouraged to obtain all required data from the appropriate computer file to insure the most recent updates.



# Remark Codes

The following remark codes may appear with the water-quality data in this report:

PRINTED OUTPUT REMARK 

# E Estimated value > Actual value is known to be greater than the value show < Actual value is known to be less than the value shown K Results based on colony count outside the acceptance range (non-ideal colony count) L Biological organism count less than 0.5 percent (organism may be observed rather than counted) D Biological organism count equal to or greater than 15 percent (dominant) V Analyte was detected in both the environmental sample and the associated blanks. & Biological organism estimated as dominant

Dissolved Trace-Element Concentrations



# NOTE: Traditionally, dissolved trace-element concentrations have been reported at the microgram per liter ( μ g/L) level. Recent evidence, mostly from large rivers, indicates that actual dissolved-phase concentrations for a number of trace elements are within the range of 10’s to 100’s of nanograms per liter (ng/L). Data above the μ g/L level should be viewed with caution. Such data may actually represent elevated environmental concentrations from natural or human causes; however, these data could reflect contamination introducedduring sampling, processing, or analysis. To confidently produce dissolved trace-element data with insignificant contamination, the U.S. Geological Survey began using new trace-element protocols at some stations in water year 1994.

Change in National Trends Network Procedures



# NOTE: Sample handling procedures at all National Trends Network stations were changed substantially onJanuary 11, 1994, in order to reduce contamination from the sample shipping container. The data for samples before and after that date are different and not directly comparable. A tabular summary of the differences based on a special intercomparison study, is available from the NADP/NTN Coordination Office, Colorado State University, Fort Collins, CO 80523 (Telephone: 303-491-5643).

Quality-Control Data



# Data generated from quality-control (QC) samples are a requisite for evaluating the quality of the sampling and processing techniques as well as data from the actual samples themselves. Without QC data, environmental sample

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## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida 

# data cannot be adequately interpreted because the errors associated with the sample data are unknown. The various types of QC samples collected by this District are described in the following section. Procedures have been established for the storage of water-quality-control data within the USGS. These procedures allow for storage of all derived QC data and are identified so that they can be related to corresponding environmental samples. BLANK SAMPLES—Blank samples are collected and analyzed to ensure that environmental samples have not been contaminated by the overall data-collection process. The blank solution used to develop specific types of blanksamples is a solution that is free of the analytes of interest. Any measured value signal in a blank samples for an analyte (a specific component measured in a chemical analysis) that was absent in the blank solution is believed to be due to contamination. There are many types of blank samples possible, each designed to segregate a different part of the overall data-collection process. The types of blank samples collected in this District are: Source solution blank - a blank solution that is transferred to a sample bottle in an area of the office laboratory with an atmosphere that is relatively clean and protected with respect to target analytes.
Ambient blank - a blank solution that is put in the same type of bottle used for an environmental sample, kept with the set of sample bottles before sample collection, and opened at the site and exposed to the ambient conditions.
Field blank - a blank solution that is subjected to all aspects of sample collection, field processing preservation, transportation, and laboratory handling as an environmental sample.
Trip blank - a blank solution that is put in the same type of bottle used for an environmental sample and kept with the set of sample bottles before and after sample collection.
Equipment blank - a blank solution that is processed through all equipment used for collecting and processing an environmental sample (similar to a field blank but normally done in the more controlled conditions of the office.)
Sampler blank - a blank solution that is poured or pumped through the same field sampler used for collecting an environmental sample. Pump blank - a blank solution that is processed through the same pump-and-tubing system used for an environmental sample. Standpipe blank - a blank solution that is poured from the containment vessel (stand-pipe) before the pump is inserted to obtain the pump blank. Filter blank - a blank solution that is filtered in the same manner and through the same filter apparatus used for an environmental sample. Splitter blank - a blank solution that is mixed and separated using a field splitter in the same manner and through the same apparatus used for an environmental sample. Preservation blank - a blank solution that is treated with the sampler preservatives used for an environmental sample. Canister blank - a blank solution that is taken directly from a stainless steel canister just before the VOC sampler is submerged to obtain a field blank sample.REFERENCE SAMPLES-Reference material is a solution or material prepared by a laboratory whose composition is certified for one or more properties so that it can be used to assess a measurement method. Samples of referencematerial are submitted for analysis to ensure that an analytical method is accurate for the known properties of the reference material. Generally, the selected reference material properties are similar to the environmental sample properties. REPLICATE SAMPLES-Replicate samples are a set of environmental samples collected in a manner such that the samples are thought to be essentially identical in composition. Replicate is the general case for which a duplicate is the special case consisting of two samples. Replicate samples are collected and analyzed to establish the amount ofvariability in the data contributed by some part of the collection and analytical process. There are many types of replicate samples possible, each of which may yield slightly different results in a dynamic hydrologic setting, such as a flowing stream. The types of replicate samples collected in this district are:

## WATER RESOURCES DATA FOR FLORIDA, 2001 23 

## Volume 4: Northwest Florida 

# Concurrent sample - a type of replicate sample in which the samples are collected simultaneously with two or more samplers or by using one sampler and alternating collection of samples into two or more compositing containers.
Sequential sample - a type of replicate sample in which the samples are collected one after the other, typically over a short time.
Split sample - a type of replicate sample in which a sample is split into subsamples contemporaneous in time and

space.SPIKE SAMPLES-Spike samples are samples to which known quantities of a solution with one or more wellestablished analyte concentrations have been added. These samples are analyzed to determine the extent of matrix interference or degradation on the analyte concentration during sample processing and analysis. Concurrent sample - a type of spike sample that is collected at the same time with the same sampling and compositing devices then spiked with the same spike solution containing laboratory-certified concentrations of selected analytes.
Split sample - a type of spike sample in which a sample is split into subsamples contemporaneous in time and space then spiked with the same spike solution containing laboratory-certified concentrations of selected analytes.



# Records of Ground-Water Levels

Ground-water level data from a statewide network of wells are published herein. The records include data from wells equipped with water-level recorders and data from wells where water levels are measured periodically.

Data Collection and Computation



# Measurements of water levels are made in many types of wells under varying conditions, but the methods of measurement are standardized to the extent possible. The equipment and measuring techniques used at each observation well ensure that measurements at each well are of consistent accuracy and reliability.Tables of water-level data are presented by counties arranged in alphabetical order. The prime identification number for a given well is the 15-digit number that appears in the upper left corner of the table. Water-level records are obtained from direct measurements with a steel tape, pressure gage, manometer, or from the graph or punched tape of a water-level recorder. The measurements in this report are given in feet above or below National Geodetic Vertical Datum of 1929 or in some tables as feet below land-surface datum. Land-surface datum is a datum plane that is approximately at land surface at each well. The elevation of the land-surface datum is given in the well description. The height of the measuring point (MP) above or below land-surface datum is given in each well description. Water levels are reported to as many significant figures as can be justified by the local conditions. For example, in a measurement of a depth to water of several hundred feet, the error of determining the absolute value of the total depth to water may be a few tenths of a foot, whereas the error in determining the net change of water level between successive measurements may be only a few hundredths of a foot. For lesser depths to water, the accuracy is greater. Accordingly, most measurements are reported to a hundredth of a foot, but some are given to a tenth of a foot or a larger unit.

Data Presentation



# Each well record consists of three parts, the station description and the data table of water levels observed during the water year. The description of the well is presented first through use of descriptive headings preceding the tabular data. The comments to follow clarify information presented under the various headings of the well description.
LOCATION.--This paragraph follows the well-identification number and reports the latitude and longitude (given in

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## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida 

# degrees, minutes, and seconds); a landline location designation; the hydrologic-unit number; and the distance and direction from a geographic point of reference; and the owner’s name.
AQUIFER.--This entry designates by name (if a name exists) and geologic age the aquifer(s) open to the well.
WELL CHARACTERISTICS.--This entry describes the well in terms of depth, diameter, casing depth and/or screened interval, method of construction, use, and additional information such as casing breaks, collapsed screen, and other changes since construction.
INSTRUMENTATION.--This paragraph provides information on both the frequency of measurement and the collection method used, allowing the user to better evaluate the reported water-level extremes by knowing whether they are based on weekly, monthly, or some other frequency of measurement.
DATUM.--This entry describes both the measuring point and the land-surface elevation at the well. The measuring point is described physically (such as top of collar, notch in top of casing, plug in pump base and son on), and in relation to land surface (such as 1.3 ft above land-surface datum). The elevation of the land-surface datum is described in feet above (or below) National Geodetic Vertical Datum of 1929 (NGVD of 1929); it is reported with a precision depending on the method of determination.
REMARKS.--This entry describes factors that may influence the water level in a well or the measurement of the water level. It should identify wells that also are water-quality observation wells, and may be used to acknowledge the assistance of local (non-Survey) observers.
PERIOD OF RECORD.--This entry indicates the period for which there are published records for the well. It reports the month and year of the start of publication of water-level records by the U.S. Geological Survey and the words “to current year” if the records are to be continued into the following year. Periods for which water-level records are available, but are not published by the Geological Survey, may be noted.
EXTREMES FOR PERIOD OF RECORD.--This entry contains the highest and lowest water levels of the period of published record, with respect to land-surface datum, and the dates of their occurrence.

A table of water levels follows the station description for each well. Water levels are reported in feet below landsurface datum and all taped measurements of water level are listed. For wells equipped with recorders, only abbreviated tables are published; generally, only water-level lows are listed for every fifth day and at the end of the month (EOM). The highest and lowest water levels of the water year and their dates of occurrence are shown on a line below the abbreviated table. Because all values are not published for wells with recorders, the extremes may be values that are not listed in the table. Missing records are indicated by dashes in place of the water level.



# Records of Ground-Water Quality
Records of ground-water quality in this report differ from other types of records in that, for most sampling sites, they consist of only one set of measurements for the water year. The quality of ground water ordinarily changes only slowly; therefore, for most general purposes, one annual sampling, or only a few samples taken at infrequent intervals during the year, is sufficient. Frequent measurement of the same constituents is not necessary unless one is concerned with a particular problem. In the special cases where the quality of ground water may change more rapidly, more frequent measurements are made to identify the nature of the changes.

Data Collection and Computation


# Methods for collecting and analyzing water samples are described in the “U.S. Geological Survey Techniques of Water-Resources Investigations” manuals listed at the end of the introductory text. The values reported in this report represent water-quality conditions at the time of sampling as much as possible, consistent with available sampling techniques and methods of analysis. All samples were obtained by trained personnel. The wells sampled were pumped long enough to assure that the water collected came directly from the aquifer and had not stood for a longtime in the well casing where it would have been exposed to the atmosphere and to the material, possibly metal, comprising the casing.

## WATER RESOURCES DATA FOR FLORIDA, 2001 25 

## Volume 4: Northwest Florida

Data Presentation


# The records of ground-water quality are published with the ground-water-level records for each county. Data for quality of ground water are identified by well number. The prime identification number for wells sampled is the 15- digit number derived from the latitude-longitude locations. The Remark Codes listed for surface-water-quality records are also applicable to ground-water-quality records.



# ACCESS TO USGS WATER DATA
The USGS provides near real-time stage and discharge data for many of the gaging stations equipped with the necessary telemetry and historic daily-mean and peak-flow discharge data for most current or discontinued gaging stations through the world wide web (WWW). These data may be accessed at http://www.water.usgs.govSome water-quality and ground-water data also are available through the WWW. In addition, data can be provided in various electronic formats. Information about the availability of specific types of data or products, and user charges, can be obtained locally from each of the Water Resources Division District Offices (see address on the back of the title page).

## 26 WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida



# DEFINITION OF TERMS

Specialized technical terms related to st reamflow, water-quality, and other hydrologic data, as used in this report, are defined below. Terms such as algae, water level, precipitatio n are used in their common everyday meanings, definitions of which are given in standard dictionaries. Not all terms defined in this alphabetical list apply to every State. See also table for converting English units to International System (SI) Units on the inside of the back cover.

Acid neutralizing capacity (ANC) is the equivalent sum of

all bases or base-producing materials, solutes plus particulates, in an aqueous system that can be titrated with acid to an equivalence point. This term designates titration of an “unfiltered” sample (formerly reported as alkalinity).

Acre-foot (AC-FT, acre-ft) is a unit of volume, commonly

used to measure quantities of water used or stored, equivalent to the volume of water required to cover 1 acre to a depth of 1 foot and equivalent to 43,560 cubic feet, 325,851 gallons, or 1,233 cubic meters. (See also “Annual runoff”)
Adenosine triphosphate (ATP) is an organic, phosphaterich, compound important in the transfer of energy in organisms. Its central role in living cells makes ATP an excellent indicator of the presence of living material in water. A measurement of ATP therefore provides a sensitive and rapid estimate of biomass. ATP is reported in micrograms per liter.
Algal growth potential (AGP) is the maximum algal dry

weight biomass that can be produced in a natural water sample under standardized laboratory conditions. The growth potential is the algal biomass present at stationary phase and is expressed as milligrams dry weight of algae produced per liter of sample.
Alkalinity is the capacity of solutes in an aqueous system to

neutralize acid. This term designates titration of a “filtered” sample.

Annual runoffis the total quantity of water that is discharged (“runs off”) from a drainage basin in a year. Datareports may present annual runoff data as volumes in acrefeet, as discharges per unit of drainage area in cubic feet per second per square mile, or as depths of water on the drainage basin in inches.
Annual 7-day minimum is the lowest mean value for any

7-consecutive-day period in a year. Annual 7-day minimum values are reported herein for the calendar year andthe water year (October 1 to September 30). Most lowflow frequency analyses use a climatic year (April 1- March 31), which tends to prevent the low-flow period from being artificially split between adjacent years. The date shown in the summary statistics table is the initial date of the 7-day period. (This value should not be confused with the 7-day 10-year low-flow statistic.)

Aroclor is the registered trademark for a group of polychlorinated biphenyls that were manufactured by the Monsanto Company prior to 1976. Aroclors are assignedspecific 4-digit reference numbers dependent upon molecular type and degree of substitution of the biphenyl ring hydrogen atoms by chlorine atoms. The first two digits of a numbered aroclor represent the molecular type and the last two digits represent the weight percent of the hydrogen substituted chlorine.

Artificial substrate is a device that is purposely placed in a

stream or lake for colonization of organisms. The artificialsubstrate simplifies the community structure by standardizing the substrate from which each sample is taken. Examples of artificial substrates are basket samplers (made ofwire cages filled with clean streamside rocks) and multiplate samplers (made of hard board) for benthic organism collection, and plexiglass strips for periphyton collection. (See also “Substrate”)

Ash mass is the mass or amount of residue present after the

residue from the dry mass determination has been ashed in a muffle furnace at a temperature of 500 ° C for 1 hour. Ash mass of zooplankton and phytoplankton is expressed in grams per cubic meter (g/m 3 

## ), and periphyton and benthic organisms in grams per square meter (g/m 2 

## ). (See also “Biomass”)

Bacteria are microscopic unicellula r organisims, typically

spherical, rodlike, or spiral and threadlike in shape, often clumped into colonies. Some b acteria cause disease, while others perform an essential role in nature in the recycling of materials; for example, by decomposing organic matter into a form available for reuse by plants.
Base discharge (for peak discharge) is a discharge value,

determined for selected stations, above which peak discharge data are published. The base discharge at each station is selected so that an av erage of about three peaks per year will be published.

Base flow is sustained flow of a stream in the absence of

direct runoff. It includes natural and human-induced streamflows. Natural base flow is sustained largely by ground-water discharge.

Bedload is material in transport that is supported primarily

by the streambed. In this report, bedload is considered to consist of particles in transit from the bed to an elevation equal to the top of the bedload sampler nozzle (rangingfrom 0.25 to 0.5 ft) that are retained in the bedload sampler. A sample collected with a pressure-differential bed-

## WATER RESOURCES DATA FOR FLORIDA, 2001 27 Volume 4: Northwest Florida

load sampler may also contain a component of the suspended load.
Bedload discharge (tons per day) is rate of sediment moving as bedload, reported as dry weight, that passes through a cross section in a given time. NOTE: Bedload dischargevalues in this report may include a component of the suspended-sediment discharge. A correction may be necessary when computing the total sediment discharge by summingthe bedload discharge and the suspended-sediment discharge. (See also “Bedload” and “Sediment”)

Bed material is the sediment mixture of which a streambed,

lake, pond, reservoir, or estuary bottom is composed. (See also “Bedload” and “Sediment”)
Benthic organisms are the group of organisms inhabiting

the bottom of an aquatic e nvironment. They include a number of types of organisms, such as bacteria, fungi, insect larvae and nymphs, snails, clams, and crayfish. They are useful as indicators of water quality.
Biochemical oxygen demand (BOD) is a measure of the

quantity of dissolved oxygen, in milligrams per liter, necessary for the decomposition of organic matter by microorganisms, such as bacteria.

Biomass is the amount of living matter present at any given

time, expressed as mass per unit area or volume of habitat.
Biomass pigment ratio is an indicator of the total proportion of periphyton which are autotrophic (plants). This is also called the Autotrophic Index.
Blue-green algae ( Cyanophyta ) are a group of phytoplankton organisms having a blue pigment, in addition to the green pigment called chlorophy ll. Blue-green algae often cause nuisance conditions in water. Concentrations are expressed as a number of cells per milliliter (cells/mL) of sample. (See also “Phytoplankton”)
Bottom material ( See “Bed material”)

Cells/volume refers to the number of cells of any organism

that is counted by using a microscope and grid or counting cell. Many planktonic organisms are multicelled and are counted according to the number of contained cells per sample volume, and are generally reported as cells or units per milliliter (mL) or liter (L).

Cells volume (biovolume) determination is one of several

common methods used to estimate biomass of algae in aquatic systems. Cell members of algae are frequently used in aquatic surveys as an indicator of algal production.However, cell numbers alone cannot represent true biomass because of considerable cell-size variation among the algal species. Cell volume ( μ m 3 

## ) is determined by obtaining critical cell measurements on cell dimensions (for example, length, width, height, or radius) for 20 to 50 cells of each important species to obtain an average biovolumeper cell. Cells are categorized according to the correspondence of their cellular shape to the nearest geometric solid or combinations of simple solids (for example, spheres,cones, or cylinders). Representative formulae used to compute biovolume are as follows:
sphere 4/3 π r 3 

## cone 1/3 π r 3 

## h cylinder π r 3 

## h.
pi is the ratio of the circum ference to the diameter of a circle; pi = 3.14159...From cell volume, total algal biomass expressed as biovolume ( μ m 3 

## /mL) is thus determined by multiplying thenumber of cells of a given species by its average cell volume and then summing these volumes over all species.
Cfs-day (See “Cubic foot per second-day”)
Chemical oxygen demand (COD) is a measure of the chemically oxidizable material in the water and furnishes an approximation of the amount of organic and reducing material present. The determined value may correlate with BOD or with carbonaceous organic pollution from sewage or industrial wastes. [See also “Biochemical oxygen demand (BOD)”]
Clostridium perfringens (C. perfringens) is a spore-forming

bacterium that is common in the feces of human and other warm-blooded animals. Clostridial spores are being used experimentally as an indicator of past fecal contaminationand presence of microorganisms that are resistant to disinfection and environmental stresses. (See also “Bacteria”)
Coliphages are viruses that infect and replicate in coliform

bacteria. They are indicative of sewage contamination of waters and of the survival an d transport of viruses in the environment.

Color unit is produced by 1 milligram per liter of platinum

in the form of the chloroplatinate ion. Color is expressed in units of the platinum-cobalt scale.
Confined aquifer is a term used to describe an aquifer containing water between two relatively impermeable boundaries. The water level in a well tapping a confined aquifer stands above the top of the confined aquifer and can be higher or lower than the water table that may be present in the material above it. In some cases, the water level can rise above the ground surface, yielding a flowing well.

Contents is the volume of water in a reservoir or lake.

Unless otherwise indicated, volume is computed on the basis of a level pool and does not include bank storage.

Continuous-record station is a site where data are collected

with sufficient frequency to define daily mean values and variations within a day.

Control designates a feature in the channel downstream

from a gaging station that physically influences the watersurface elevation and thereby determines the stage-discharge relation at the gage. This feature may be a constriction of the channel, a bedrock outcrop, a gravel bar, an artificial structure, or a uniform cross section over a long reach of the channel.

## 28 WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

Control structure as used in this report is a structure on a

stream or canal that is used to regulate the flow or stage of the stream or to prevent the intrusion of saltwater.
Cubic foot per second (CFS, ft 3 

## /s) is the rate of discharge

representing a volume of 1 cubic foot passing a given point in 1 second. It is equivalent to approximately 7.48 gallons per second or approximately 449 gallons per minute, or 0.02832 cubic meters per second. The term “second-feet”sometimes is used synonymously with “cubic feet per second” but is now obsolete.
Cubic foot per second-day (CFS-DAY, Cfs-day, [(ft 3 

## /s)/d])

is the volume of water represented by a flow of 1 cubic foot per second for 24 hours. It is equivalent to 86,400 cubic feet, 1.98347 acre-feet, 646,317 gallons, or 2,446.6 cubic meters. The daily-mean discharges reported in the daily-value data tables are numerically equal to the daily volumes in cfs-days, and the totals also represent volumes in cfs-days.
Cubic foot per second per square mile [CFSM, (ft 3 

## /s)/mi 2 

## ]

is the average number of cubic feet of water flowing per second from each square mile of area drained, assuming the runoff is distributed uni formly in time and area. (See also “Annual runoff”)
Daily mean suspended-sediment concentration is the

time-weighted concentration of suspended sediment passing a stream cross section during a 24-hour day. (See also “Mean concentration of suspended sediment,” “Sediment,” and “Suspended-sedim ent concentration”)
Daily-record station is a site where data are collected with

sufficient frequency to develop a record of one or more data values per day. The frequency of data collection can range from continuous recording to periodic sample or data collection on a daily or near-daily basis.

Data Collection Platform (DCP) is an electronic instrument

that collects, processes, and stores data from various sensors, and transmits the data by satellite data relay, line-ofsight radio, and/or landline telemetry.
Data logger is a microprocessor-based data acquisition system designed specifically to acquire, process, and store data. Data are usually downloaded from onsite data loggers for entry into office data systems.

Datum is a surface or point relative to which measurements

of height and/or horizontal position are reported. A vertical datum is a horizontal surface used as the zero point formeasurements of gage height, stage, or elevation; a horizontal datum is a reference for positions given in terms oflatitude-longitude, State Plane coordinates, or UTM coordinates. (See also “Gage datum,” “Land-surface datum,” “National Geodetic Vertical Datum of 1929,” and “North American Vertical Datum of 1988”)

Diatoms are the unicellular or colonial algae having a siliceous shell. Their concentrations are expressed as number of cells per milliliter (cells/mL) of sample. (See also “Phytoplankton”)

Diel is of or pertaining to a 24-hour period of time; a regular

daily cycle.
Discharge , or flow, is the rate that matter passes through a

cross section of a stream channel or other water body per unit of time. The term commonly refers to the volume of water (including, unless otherwise stated, any sediments or other constituents suspended or dissolved in the water) that passes a cross section in a st ream channel, canal, pipeline, etc., within a given period of time (cubic feet per second). Discharge also can apply to the rate at which constituentssuch as suspended sediment, bedload, and dissolved or suspended chemical constituents, pass through a cross section,in which cases the quantity is expressed as the mass of constituent that passes the cross section in a given period of time (tons per day).

Dissolved refers to that material in a representative water

sample that passes through a 0.45-micrometer membrane filter. This is a convenient operational definition used by Federal and State agencies that collect water-quality data. Determinations of “dissolved” constituent concentrations are made on sample water that has been filtered.
Dissolved oxygen (DO) is the molecular oxygen (oxygen

gas) dissolved in water. The concentration in water is afunction of atmospheric pressure, temperature, and dissolved-solids concentration of the water. The ability ofwater to retain oxygen decreases with increasing temperature or dissolved-solids concentration. Photosynthesis and respiration by plants commonly cause diurnal variations in dissolved-oxygen concentration in water from some

streams.

Dissolved-solids concentration in water is the quantity of

dissolved material in a sample of water. It is determined either analytically by th e “residue-on-evaporation” method, or mathematically by totaling the concentrations of individual constituents reported in a comprehensive chemical analysis. During the analytical determination, the bicarbonate (generally a major dissolved component ofwater) is converted to carbonate. In the mathematical calculation, the bicarbonate value, in milligrams per liter, ismultiplied by 0.4926 to convert it to carbonate. Alternatively, alkalinity concentration (as mg/L CaCO 3 

## ) can be converted to carbonate concentration by multiplying by 0.60.
Diversity index (H) (Shannon Index) is a numerical expression of evenness of distribution of aquatic organisms. The formula for diversity index is:

d n i



## n ----log 2 

## n i



## n ----

i 1 ≈ s 

# ∑

– =

## WATER RESOURCES DATA FOR FLORIDA, 2001 29 Volume 4: Northwest Florida

where n i 

## is the number of individuals per taxon, n is the total number of individuals, and s is the total number of taxa in the sample of the community. Index values range from zero, when all the organisms in the sample are the same, to some positive number, when some or all of the organisms in the sample are different. Drainage area of a stream at a specific location is that area

upstream from the location, measured in a horizontal plane, that has a common outlet at the site for its surface runoff from precipitation that normally drains by gravity into a stream. Drainage areas given herein include all closed basins, or noncontri buting areas, within the area unless otherwise specified.
Drainage basin is a part of the Earth’s surface that contains

a drainage system with a common outlet for its surface runoff. (See “Drainage area”)
Dry mass refers to the mass of residue present after drying

in an oven at 105 ° C, until the mass remains unchanged.This mass represents the total organic matter, ash and sediment, in the sample. Dry-mass values are expressed in the same units as ash mass. (See also “Ash mass,” “Biomass,” and “Wet mass”)
Dry weight refers to the weight of animal tissue after it has been dried in an oven at 65 °C until a constant weight isachieved. Dry weight represents total organic and inorganic matter in the tissue. (See also “Wet weight”)

Enterococcus bacteria are commonly found in the feces of

humans and other warm-blooded animals. Although some strains are ubiquitous and not related to fecal pollution, the presence of enterococci in water is an indication of fecal pollution and the possible presence of enteric pathogens. Enterococcus bacteria are those bacteria that produce pink to red colonies with black or reddish-brown precipitate after incubation at 41 ° C on mE agar and subsequent transfer to EIA medium. Enterococci include Streptococcus feacalis, Streptococcus feacium, Streptococcus avium, and their variants. (See also “Bacteria”)

EPT Index is the total number of distinct taxa within the

insect orders Ephemeroptera, Plecoptera, and Trichoptera. This index summarizes the taxa richness within the aquatic insects that are generally considered pollution sensitive, the index usually decreases with pollution.

E

scherichia coli (E. coli) are bacteria present in the intestine and feces of warm-blooded animals. E. coli are a member species of the fecal coliform group of indicator bacteria. Inthe laboratory, they are defined as those bacteria that produce yellow or yellow-brown colonies on a filter pad saturated with urea substrate broth after primary culturing for22 to 24 hours at 44.5 °C on mTEC medium. Their concentrations are expressed as number of colonies per 100 mL of sample. (See also “Bacteria”)
Estimated (E) value of a concentration is reported when an

analyte is detected and all criteria for a positive result are met. If the concentration is less than the method detection limit (MDL), an ‘E’ code will be reported with the value. If the analyte is qualitatively id entified as present, but the quantitative determination is substantially more uncertain, the National Water Quality Laboratory will identify the result with an ‘E’ code even though the measured value is greater than the MDL. A value reported with an ‘E’ code should be used with caution. When no analyte is detectedin a sample, the default reporting value is the MDL preceded by a less than sign (<).
Euglenoids ( Euglenophyta ) are a group of algae that are

usually free-swimming and rare ly creeping. They have theability to grow either photosynthetically in the light or heterotrophically in the dark . (See also “Phytoplankton”)
Extractable organic halides (EOX) are organic compounds

that contain halogen atoms such as chlorine. These organiccompounds are semi-volatile and extractable by ethyl acetate from air-dried streambed sediments. The ethyl acetate extract is combusted, and the concentration is determined by microcoulometric determination of the halides formed. The concentration is reported as micrograms of chlorine per gram of the dry weight of the streambed sediments.

Fecal coliform bacteria are present in the intestine or feces

of warm-blooded animals. They are often used as indicators of the sanitary quality of the water. In the laboratory,they are defined as all organisms that produce blue colonies within 24 hours when incubated at 44.5 ° C plus or minus 0.2 ° C on M-FC medium (nutrient medium for bacterial growth). Their concentr ations are expressed as number of colonies per 100 mL of sample. (See also “Bacteria”)
Fecal streptococcal bacteria are present in the intestine of

warm-blooded animals and are ubiquitous in the environment. They are characterized as gram-positive, cocci bacteria that are capable of grow th in brain-heart infusionbroth. In the laboratory, they are defined as all the organisms that produce red or pink colonies within 48 hours at 35 ° C plus or minus 1.0 ° C on KF-streptococcus medium (nutrient medium for bacteria l growth). Their concentrations are expressed as number of colonies per 100 mL of sample. (See also “Bacteria”)
Fire algae ( Pyrrhophyta ) are free-swimming unicells characterized by a red pigment sp ot. (See also “Phytoplankton”)
Flow-duration percentiles are values on a scale of 100 that

indicate the percentage of time for which a flow is not exceeded. For example, the 90th percentile of river flow is greater than or equal to 90 percent of all recorded flow

rates. Gage datum is a horizontal surface used as a zero point for

measurement of stage or gage height. This surface usuallyis located slightly below the lowest point of the stream bottom such that the gage height is usually slightly larger than

## 30 WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

the maximum depth of water. Because the gage datum itself is not an actual physical object, the datum usually isdefined by specifying the elevations of permanent reference marks such as bridge abutments and survey monuments, and the gage is set to agree with the reference marks. Gage datum is a local datum that is maintained independently of any National geodetic datum. However, if the elevation of the gage datum relative to the National datum (North American Vertical Datum of 1988 orNational Geodetic Vertical Datum of 1929) has been determined, then the gage readings can be converted to elevations above the National datum by adding the elevation of the gage datum to the gage reading.
Gage height (G.H.) is the water-surface elevation, in feet

above the gage datum. If the water surface is below the gage datum, the gage height is negative. Gage height is often used interchangeably with the more general term “stage,” although gage height is more appropriate when used in reference to a reading on a gage.
Gage values are values that are recorded, transmitted and/or

computed from a gaging station. Gage values typically are collected at 5-, 15-, or 30-minute intervals.
Gaging station is a site on a stream, canal, lake, or reservoir

where systematic observations of stage, discharge, or other hydrologic data are obtained. When used in connection with a discharge record, the term is applied only to those gaging stations where a continuous record of discharge is computed.
Gas chromatography/flame ionization detector (GC/FID)

is a laboratory analytical method used as a screening technique for semivolatile organic compounds that are extractable from water in methylene chloride.
Green algae have chlorophyll pigments similar in color to

those of higher green plants. Some forms produce algae mats or floating “moss” in lakes. Their concentrations are expressed as number of cells per milliliter (cells/mL) of sample. (See also “Phytoplankton”)
Habitat quality index is the qualitative description (level 1)

of instream habitat and riparian conditions surrounding the reach sampled. Scores range from 0 to 100 percent with higher scores indicative of desirable habitat conditions for aquatic life. Index only applicable to wadable streams.

Hardness of water is a physical-chemical characteristic that

is commonly recognized by the increased quantity of soap required to produce lather. It is computed as the sum of equivalents of polyvalent cations (primarily calcium andmagnesium) and is expressed as the equivalent concentration of calcium carbonate (CaCO 3 

## ).
High tide is the maximum height reached by each rising

tide. The high-high and low-high tides are the higher and lower of the two high tides, respectively, of each tidal day. See NOAA web site: http://www.co-ops.nos.noaa.gov/tideglos.html Hilsenhoff’s Biotic Index (HBI) is an indicator of organicpollution which uses tolerance values to weight taxa abundances; usually increases with po llution. It is calculated as follows:

where n is the number of individuals of each taxon, a is the tolerance value of each taxon, and N is the total number of organisms in the sample.

Horizontal datum (See “Datum”)
Hydrologic benchmark station is one that provides hydrologic data for a basin in which the hydrologic regimen willlikely be governed solely by natural conditions. Data collected at a benchmark statio n may be used to separate effects of natural from human-induced changes in otherbasins that have been developed and in which the physiography, climate, and geology are similar to those in the undeveloped benchmark basin.
Hydrologic index stations referred to in this report are four

continuous-record gaging stations that have been selected as representative of streamflow patterns for their respective regions. Station locations are shown on index maps.
Hydrologic unit is a geographic area representing part or all

of a surface drainage basin or di stinct hydrologic feature as defined by the former Office of Water Data Coordination and delineated on the State Hydrologic Unit Maps by the USGS. Each hydrologic unit is identified by an 8-digit number.

Inch (IN., in.), as used in this report, refers to the depth to

which the drainage area would be covered with water if allof the runoff for a given time period were uniformly distributed on it. (See also “Annual runoff”)
Instantaneous discharge is the discharge at a particular

instant of time. (S ee also “Discharge”)
Laboratory Reporting Level (LRL) is generally equal to

twice the yearly determined long-term method detection level (LT-MDL). The LRL controls false negative error. The probability of falsely reporting a non-detection for a sample that contained an analyte at a concentration equal to or greater than the LRL is predicted to be less than or equal to 1 percent. The value of the LRL will be reported with a “less than” (<) remark code for samples in which theanalyte was not detected. The National Water Quality Laboratory collects quality-control data from selected analytical methods on a continuing basis to determineLT-MDLs and to establish LRLs. These values are reevaluated annually based on the most current quality-control data and may, therefore, change. [Note: In several previous NWQL documents (Connor and others, 1998; NWQL Technical Memorandum 98.07, 1998), the LRL was called the non-detection value or NDV—a term that is no longer used.) HBI sum n ( ) a ( ) N --------------- =

## WATER RESOURCES DATA FOR FLORIDA, 2001 31 Volume 4: Northwest Florida

Land-surface datum (lsd) is a datum plane that is approximately at land surface at each ground-water observation well.
Light-attenuation coefficient, also known as the extinction

coefficient, is a measure of water clarity. Light is attenuated according to the Lambert-Beer equation

,

where I o 

## is the source light intensity, I is the light intensity at length L (in meters) from the source, λ is the light-attenuation coefficient, and e is the base of the natural logarithm. The light attenuation coefficient is defined as

.

Lipid is any one of a family of compounds that are insoluble

in water and that make up one of the principal components of living cells. Lipids include fats, oils, waxes, andsteroids. Many environmental contaminants such as organochlorine pesticides are lipophilic.
Long-Term Method Detection Level (LT–MDL) is a detection level derived by determining the standard deviation of a minimum of 24 method detection limit (MDL) spike sample measurements over an extended period of time. LT–MDL data are collected on a continuous basis to assess year-to-year variations in the LT–MDL. The LT–MDLcontrols false positive error. The chance of falsely reporting a concentration at or gr eater than the LT–MDL for a sample that did not contain the analyte is predicted to be less than or equal to 1 percent.

Low tide is the minimum height reached by each falling

tide. The high-low and low-low tides are the higher and lower of the two low tides, re spectively, of each tidal day. See NOAA web site: http://www.co-ops.nos.noaa.gov/tideglos.html
Macrophytes are the macroscopic plants in the aquatic environment. The most common macrophytes are the rooted vascular plants that are usually arranged in zones in aquatic ecosystems and restricted in the area by the extent of illumination through the water and sediment deposition along the shoreline.
Mean concentration of suspended sediment (Daily mean

suspended-sediment concentra tion) is the time-weighted concentration of suspended sediment passing a stream cross section during a given time period. (See also “Dailymean suspended-sediment concentration” and “Suspended-sediment concentration”)
Mean discharge (MEAN) is the arithmetic mean of individual daily mean discharges during a specific period. (See also “Discharge”)
Mean high or low tide is the average of all high or low

tides, respectively, over a specific period. Mean sea level is a local tidal datum. It is the arithmetic mean of hourly heights observed over the National Tidal Datum Epoch. Shorter series are specified in the name; for example, monthly mean sea level and yearly mean sea level. In order that they may be recovered when needed, such datums are referenced to fixed points known as benchmarks. (See also “Datum”)
Measuring point (MP) is an arbitrary permanent reference

point from which the distance to water surface in a well is measured to obtain water level.

Membrane filter is a thin microporous material of specific

pore size used to filter bacteria, algae, and other very small particles from water.
Metamorphic stage refers to the stage of development that

an organism exhibits during its transformation from animmature form to an adult form. This developmental process exists for most insects, and the degree of difference from the immature stage to th e adult form varies from relatively slight to pronounced, with many intermediates.Examples of metamorphic stages of insects are egg-larvaadult or egg-nymph-adult.

Method Detection Limit (MDL) is the minimum concentration of a substance that can be measured and reported with 99-percent confidence that th e analyte concentration is greater than zero. It is determ ined from the analysis of a sample in a given matrix containing the analyte. At the MDL concentration, the risk of a false positive is predicted to be less than or equal to 1 percent.
Methylene blue active substances (MBAS) are apparent

detergents. The determination depends on the formation of a blue color when methylene bl ue dye reacts with synthetic anionic detergent compounds.
Micrograms per gram (UG/G, μ g/g) is a unit expressing the

concentration of a chemical constituent as the mass (micrograms) of the element per unit mass (gram) of material analyzed.
Micrograms per kilogram (UG/KG, μ g/kg) is a unit

expressing the concentration of a chemical constituent as the mass (micrograms) of the constituent per unit mass (kilogram) of the material analyzed. One microgram per kilogram is equivalent to 1 part per billion.
Micrograms per liter (UG/L, μ g/L) is a unit expressing the

concentration of chemical cons tituents in water as mass (micrograms) of constituent per unit volume (liter) of water. One thousand micrograms per liter is equivalent to 1 milligram per liter. One microgram per liter is equivalent to 1 part per billion.
Microsiemens per centimeter (US/CM, μ S/cm) is a unit

expressing the amount of electrical conductivity of a solution as measured between opposite faces of a centimeter cube of solution at a specified temperature. Siemens is theInternational System of Units nomenclature. It is synonyI I o 

## e λ L

– 

## =

λ 1 L ---log e 

## I I o 

## ---- – =

## 32 WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

mous with mhos and is the reciprocal of resistance in ohms.
Milligrams per liter (MG/L, mg/L) is a unit for expressing

the concentration of chemical constituents in water as the mass (milligrams) of constituent per unit volume (liter) of water. Concentration of suspended sediment also isexpressed in mg/L and is based on the mass of dry sediment per liter of water-sediment mixture.
Minimum Reporting Level (MRL) is the smallest measured concentration of a constituent that may be reliably reported by using a given analytical method (Timme, 1995).
Miscellaneous site, miscellaneous station, or miscellaneous

sampling site is a site where streamflow, sediment, and/or water-quality data or water-quality or sediment samples arecollected once, or more often on a random or discontinuous basis to provide better areal coverage for defining hydrologic and water-quality conditions over a broad area in a river basin.
Most probable number (MPN) is an index of the number of

coliform bacteria that, more probably than any other number, would give the results shown by the laboratory examination; it is not an actual enumeration. MPN is determinedfrom the distribution of gas-positive cultures among multiple inoculated tubes.
Multiple-plate samplers are artificial substrates of known

surface area used for obtaining benthic invertebrate samples. They consist of a series of spaced, hardboard plates on an eyebolt.
Nanograms per liter (NG/L, ng/L) is a unit expressing the

concentration of chemical cons tituents in solution as mass (nanograms) of solute per unit volume (liter) of water. One million nanograms per liter is equivalent to 1 milligram per liter.

National Geodetic Vertical Datum of 1929 (NGVD of

1929) is a fixed reference adopted as a standard geodetic datum for elevations determined by leveling. It was formerly called “Sea Level Datum of 1929” or “mean sea level.” Although the datum was derived from the mean sea level at 26 tide stations , it does not necessarily represent local mean sea level at any particular place. See NOAA web site: http://www.ngs.noaa.gov/faq.shtml#WhatVD29VD88 (See “North American Vertical Datum of 1988”)

Natural substrate refers to any naturally occurring

immersed or submersed solid surface, such as a rock or tree, upon which an organism lives. (See also “Substrate”)

Nekton are the consumers in the aquatic environment and

consist of large free-swimming organisms that are capable of sustained, directed mobility.
Nephelometric turbidity unit (NTU) is the measurement

for reporting turbidity that is based on use of a standard suspension of Formazin. Turbidity measured in NTU uses nephelometric methods that depend on passing specific light of a specific wavelength through the sample.
North American Vertical Datum of 1988 (NAVD 1988) is

a fixed reference adopted as the official civilian vertical datum for elevations determined by Federal surveying and mapping activities in the U.S. This datum was establishedin 1991 by minimum-constraint adjustment of the Canadian , Mexican, and U.S. first-order terrestrial leveling networks.
Open or screened interval is the length of unscreened

opening or of well screen through which water enters a well, in feet below land surface.
Organic carbon (OC) is a measure of organic matter present

in aqueous solution, suspension, or bottom sediments. May be reported as dissolved organic carbon (DOC), particulate organic carbon (POC), or total organic carbon (TOC).
Organic mass or volatile mass of the living substance is the

difference between the dry mass and ash mass and represents the actual mass of the living matter. Organic mass is expressed in the same units as for ash mass and dry mass. (See also “Ash mass,” “Biomass,” and “Dry mass”)
Organism count/area refers to the number of organisms

collected and enumerated in a sample and adjusted to the number per area habitat, usually square meter (m 2 

## ), acre, or hectare. Periphyton, benthic organisms, and macrophytes are expressed in these terms.
Organism count/volume refers to the number of organisms

collected and enumerated in a sample and adjusted to the number per sample volume, usually milliliter (mL) or liter (L). Numbers of planktonic organisms can be expressed in these terms.
Organochlorine compounds are any chemicals that contain

carbon and chlorine. Organochlorine compounds that areimportant in investigations of water, sediment, and biological quality include certain pe sticides and industrial compounds.

Parameter Code is a 5-digit number used in the USGS

computerized data system, National Water Information System (NWIS), to uniquely identify a specific constituent or property.

Partial-record station is a site where discrete measurements of one or more hydrologic parameters are obtained over a period of time without continuous data being recorded or computed. A commo n example is a crest-stage gage partial-record station at which only peak stages and flows are recorded.

Particle size is the diameter, in millimeters (mm), of a particle determined by sieve or sedimentation methods. The sedimentation method utilizes the principle of Stokes Lawto calculate sediment particle sizes. Sedimentation methods (pipet, bottom-withdrawal tube, visual-accumulation tube, Sedigraph) determine fall diameter of particles in

## WATER RESOURCES DATA FOR FLORIDA, 2001 33 Volume 4: Northwest Florida

either distilled water (chemically dispersed) or in native water (the river water at the time and point of sampling).

Particle-size classification , as used in this report, agrees

with the recommendation made by the American Geophysical Union Subcommittee on Sediment Terminology. The classification is as follows:

Classification Size (mm) Method of analysis

Clay 0.00024 - 0.004 Sedimentation Silt 0.004 - 0.062 Sedimentation Sand 0.062 - 2.0 Sedimentation/sieve Gravel 2.0 - 64.0 Sieve

The particle-size distributions given in this report are not necessarily representative of a ll particles in transport in the stream. Most of the organic matter is removed, and the sample is subjected to mechan ical and chemical dispersion before analysis in distilled water. Chemical dispersion is not used for native water analysis.
Peak flow (peak stage) is an instantaneous local maximum

value in the continuous time series of streamflows orstages, preceded by a period of increasing values and followed by a period of decreasing values. Several peak values ordinarily occur in a year . The maximum peak value in a year is called the annual peak; peaks lo wer than the annual peak are called secondary peaks. Occasionally, the annual peak may not be the maximum value for the year; in such cases, the maximum value occurs at midnight at the beginning or end of the year, on the recession from or rise toward a higher peak in the ad joining year. If values are recorded at a discrete series of times, the peak recorded value may be taken as an approximation to the true peak, which may occur between the r ecording instants. If the values are recorded with finite precision, a sequence of equal recorded values may occur at the peak; in this case, the first value is taken as the peak.
Percent composition or percent of total is a unit for

expressing the ratio of a particular part of a sample or population to the total sample or population, in terms of types, numbers, weight, mass, or volume.
Percent shading is determined by using a clinometer to estimate left and right bank shading. The values are added together and divided by 180 to determine percent shading relative to a horizontal surface.

Periodic-record station is a site where stage, discharge,

sediment, chemical, physical, or other hydrologic measurements are made one or more times during a year, but at a frequency insufficient to develop a daily record.
Periphyton is the assemblage of microorganisms attached to

and living upon submerged solid surfaces. While primarilyconsisting of algae, they also include bacteria, fungi, protozoa, rotifers, and other small organisms. Periphyton are useful indicators of water quality. Pesticides are chemical compounds used to control undesirable organisms. Major categories of pesticides includeinsecticides, miticides, fungicides, herbicides, and rodenticides.
pH of water is the negative logarithm of the hydrogen-ion

activity. Solutions with pH less than 7 are termed “acidic,” and solutions with a pH greater than 7 are termed “basic.” Solutions with a pH of 7 are neutral. The presence and concentration of many dissolved chemical constituents found in water are, in part, influenced by the hydrogen-ion activity of water. Biological processes including growth, distribution of organisms, and toxicity of the water to organisms are also influenced, in part, by the hydrogen-ion activity of water.
Phytoplankton is the plant part of the plankton. They are

usually microscopic, and their movement is subject to the water currents. Phytoplankton growth is dependent upon solar radiation and nutrient substances. Because they areable to incorporate as well as release materials to the surrounding water, the phytoplankton have a profound effect upon the quality of the water. They are the primary food producers in the aquatic environment and are commonly known as algae. (S ee also “Plankton”)

Picocurie (PC, pCi) is one trillionth (1 x 10 -12 

## ) of the

amount of radioactive nuclid e represented by a curie (Ci). A curie is the quantity of radioactive nuclide that yields 3.7
x 10 10 

## radioactive disintegrations per second (dps). A picocurie yields 0.037 dps, or 2.22 dpm (disintegrations per minute).

Plankton is the community of suspended, floating, or

weakly swimming organisms that live in the open water of lakes and rivers. Concentrations are expressed as a number of cells per milliliter (cells/mL of sample).
Polychlorinated biphenyls (PCBs) are industrial chemicals

that are mixtures of chlorinated biphenyl compounds having various percentages of chlorine. They are similar in structure to organochlorine insecticides.
Polychlorinated naphthalenes (PCNs) are industrial chemicals that are mixtures of chlorinated naphthalene compounds. They have properties and applications similar to polychlorinated biphenyls (PCBs) and have been identified in commercial PCB preparations.
Primary productivity is a measure of the rate at which new

organic matter is formed and accumulated through photosynthetic and chemosynthetic activity of producer organisms (chiefly, green plants). The rate of primary production is estimated by measuring the amount of oxygen released(oxygen method) or the amount of carbon assimilated (carbon method) by the plants.
Primary productivity (carbon method) is expressed as

milligrams of carbon per area per unit time [mg C/(m 2 

## /time)] for periphyton and macrophytes or per volume [mg C/(m 3 

## /

## 34 WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

time)] for phytoplankton. Carbon method defines the amount of carbon dioxide consumed as measured by radioactive carbon (carbon-14). The carbon-14 method is of greater sensitivity than the oxygen light and dark bottle method and is preferred for use in unenriched waters. Unittime may be either the hour or day, depending on the incubation period. (See also “Primary productivity”)
Primary productivity (oxygen method) is expressed as

milligrams of oxygen per area per unit time [mg O/(m 2 

## / time)] for periphyton and macrophytes or per volume [mg O/(m 3 

## /time)] for phytoplankton. Oxygen method defines production and respiration rates as estimated from changesin the measured dissolved-oxygen concentration. The oxygen light and dark bottle method is preferred if the rate of primary production is sufficient for accurate measurements to be made within 24 hours. Unit time may be either the hour or day, depending on the incubation period. (See also “Primary productivity”)
Radioisotopes are isotopic forms of an element th at exhibit

radioactivity. Isotopes are varieties of a chemical element that differ in atomic weight, but are very nearly alike in chemical properties. The di fference arises because the atoms of the isotopic forms of an element differ in the number of neutrons in the nucleus; for example, ordinary chlorine is a mixture of isotopes having atomic weights of 35 and 37, and the natural mixture has an atomic weight ofabout 35.453. Many of the elements similarly exist as mixtures of isotopes, and a great many new isotopes have been produced in the operation of nuclear devices such as the cyclotron. There are 275 isotopes of the 81 stable elements, in addition to more than 800 radioactive isotopes.
Recoverable from bed (bottom) material is the amount of

a given constituent that is in solution after a representative sample of bottom material has been digested by a method (usually using an acid or mixture of acids) that results indissolution of readily soluble substances. Complete dissolution of all bottom material is not achieved by the digestion treatment and thus the determination represents less than the total amount (that is, less than 95 percent) of theconstituent in the sample. To achieve comparability of analytical data, equivalent digestion procedures would be required of all laboratories performing such analysesbecause different digestion procedures are likely to produce different analytical results. (See also “Bed material”)
Recurrence interval, also referred to as return period, is the

average time, usually expresse d in years, between occurrences of hydrologic events of a specified type (such as exceedances of a specified high flow or non-exceedance of a specified low flow). The terms “return period” and“recurrence interval” do not imply regular cyclic occurrence. The actual times between occurrences vary randomly, with most of the times being less than the average and a few being substantially gr eater than the average. For example, the 100-year flood is the flow rate that is exceeded by the annual maximu m peak flow at intervals whose average length is 100 years (that is, once in100 years, on average); almost two-thirds of all exceedances of the 100-year flood occur less than 100 years after the previous exceedance, half o ccur less than 70 years after the previous exceedance, and a bout one-eighth occur more than 200 years after the previous exceedance. Similarly, the 7-day 10-year low flow (7Q 10 

## ) is the flow rate belowwhich the annual minimum 7-day-mean flow dips at intervals whose average length is 10 years (that is, once in 10years, on average); almost two-thirds of the non-exceedances of the 7Q 10 

## occur less than 10 years after the previous non-exceedance, half occur less than 7 years after, and about one-eighth occur more th an 20 years after the previous non-exceedance. The recurrence interval for annual events is the reciprocal of th e annual probability of occurrence. Thus, the 100-year flood has a 1-percent chance of being exceeded by the maximum peak flow in any year, and there is a 10-percent chance in any year that the annual minimum 7-day-mean flow will be less than the 7Q 10 

## . Replicate samples are a group of samples collected in a

manner such that the samples are thought to be essentially identical in composition.
Return period (See “Recurrence interval”)
River mileage is the curvilinear distan ce, in miles, measured

upstream from the mouth along the meandering path of a stream channel in accordance with Bulletin No. 14 (October 1968) of the Water Resources Council, and typically used to denote location along a river.

Runoff is the quantity of water that is discharged (“runs

off”) from a drainage basin in a given time period. Runoff data may be presented as volumes in acre-feet, as meandischarges per unit of drainage area in cubic feet per second per square mile, or as depths of water on the drainage basin in inches. (See also “Annual runoff”)
Sea level, as used in this report, refers to one of the two commonly used national vertical datums, (NGVD 1929 or NAVD 1988). See separate entries for definitions of these datums. See conversion of units page (inside back cover) for identification of the datum used in this report.

Sediment is solid material that originates mostly from disintegrated rocks; when transported by, suspended in, or deposited from water, it is referred to as “fluvial sediment.” Sediment includes chemical and biochemical precipitates and decomposed organic material, such as humus. The quantity, characteristics, and cause of the occurrence of sediment in streams are influenced by environmental and land-use factors. Some major factors are topography, soilcharacteristics, land cover, and depth and intensity of precipitation.
Seven-day 10-year low flow (7Q10) is the discharge below

which the annual 7-day minimum flow falls in 1 year out of 10 on the long-run average. The recurrence interval of

## WATER RESOURCES DATA FOR FLORIDA, 2001 35 Volume 4: Northwest Florida

the 7Q10 is 10 years; the chance that the annual 7-day minimum flow will be less than the 7Q10 is 10 percent in any given year. (See also “Recurrence interval” and “Annual 7-day minimum”)
Sodium adsorption ratio (SAR) is the expression of relative activity of sodium ions in exchange reactions within soil and is an index of sodium or alkali hazard to the soil. Sodium hazard in water is an index that can be used to evaluate the suitability of water for irrigating crops.
Specific electrical conductance (conductivity) is a measure

of the capacity of water (or other media) to conduct an electrical current. It is expres sed in microsiemens per centimeter at 25 ° C. Specific electrical conductance is a function of the types and quantity of dissolved substances inwater and can be used for approximating the dissolvedsolids content of the water. Commonly, the concentration of dissolved solids (in milligrams per liter) is from 55 to 75 percent of the specific conductance (in microsiemens). This relation is not constant from stream to stream, and itmay vary in the same source with changes in the composition of the water.
Stable isotope ratio (per MIL/MIL) is a unit expressing the

ratio of the abundance of two radioactive isotopes. Isotope ratios are used in hydrologic studies to determine the age or source of specific waters, to evaluate mixing of different waters, as an aid in determining reaction rates, and other chemical or hydrologic processes.
Stage (See “Gage height”)
Stage-discharge relation is the relation between the watersurface elevation, termed stage (gage height), and the volume of water flowing in a channel per unit time.

Streamflow is the discharge that occurs in a natural channel.

Although the term “discharge” can be applied to the flow of a canal, the word “streamflow” uniquely describes thedischarge in a surface stream course. The term “streamflow” is more general than “runoff” as streamflow may beapplied to discharge whether or not it is affected by diversion or regulation.

Substrate is the physical surface upon which an organism

lives.

Substrate Embeddedness Class is a visual estimate of riffle

streambed substrate larger than gravel that is surrounded or covered by fine sediment (<2mm, sand or finer). Below are the class categories expressed as percent covered by fine sediment:
0 < no gravel or larger substrate 1 > 75% 2 51-75% 4 5-25% 3 26-50% 5 < 5%

Surface area of a lake is that area (acres) encompassed by

the boundary of the lake as shown on USGS topographic maps, or other available maps or photographs. Because surface area changes with lake st age, surface areas listed in this report represent those de termined for the stage at the time the maps or photographs were obtained.

Surficial bed material is the upper surface (0.1 to 0.2 ft) of

the bed material such as that material which is sampled using U.S. Series Bed-Material Samplers.
Suspended (as used in tables of chemical analyses) refers to

the amount (concentration) of undissolved material in a water-sediment mixture. It is operationally defined as the material retained on a 0.45-micrometer filter.
Suspended, recoverable is the amount of a given constituent that is in solution after the part of a representative suspended water-sediment sample that is retained on a 0.45-micrometer membrane filter has been digested by a method (usually using a dilute acid solution) that results in dissolution of only readily soluble substances. Complete dissolution of all the particulate matter is not achieved bythe digestion treatment and thus the determination represents something less than the “total” amount (that is, less than 95 percent) of the constituent present in the sample. To achieve comparability of analytical data, equivalentdigestion procedures are required of all laboratories performing such analyses because different digestion procedures are likely to produce different analytical results. Determinations of “suspended, recoverable” constituentsare made either by directly analyzing the suspended material collected on the filter or, more commonly, by difference, based on determinations of (1) dissolved and (2) total recoverable concentrations of the constituent. (See also “Suspended”)
Suspended sediment is the sediment maintained in suspension by the upward components of turbulent currents or that exists in suspension as a colloid. (See also “Sediment”)
Suspended-sediment concentration is the velocityweighted concentration of suspended sediment in the sampled zone (from the water surface to a point approximately0.3 ft above the bed) expressed as milligrams of dry sediment per liter of water-sediment mixture (mg/L). The analytical technique uses the mass of all of the sediment and the net weight of the water-sediment mixture in a sample to compute the suspended-sediment concentration. (See also “Sediment” and “Suspended sediment”)
Suspended-sediment discharge (tons/day) is the rate of

sediment transport, as measured by dry mass or volume, that passes a cross section in a given time. It is calculated in units of tons per day as fo llows: concentration (mg/L) x discharge (ft 3 

## /s) x 0.0027. (See also “Sediment,” “Suspended sediment,” and “Suspended- sediment concentration”)
Suspended-sediment load is a general term that refers to a

given characteristic of the material in suspension that passes a point during a specified period of time. The term needs to be qualified, such as “annual suspended-sediment

## 36 WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

load” or “sand-size suspended-sediment load,” and so on.It is not synonymous with either suspended-sediment discharge or concentration. (See also “Sediment”)
Suspended, total is the total amount of a given constituent

in the part of a water-sediment sample that is retained on a 0.45-micrometer membrane filter. This term is used only when the analytical procedure assures measurement of at least 95 percent of the constituent determined. Knowledge of the expected form of the constituent in the sample, as well as the analytical methodology used, is required todetermine when the results should be reported as “suspended, total.” Determinations of “suspended, total” constituents are made either by directly analyzing portions of the suspended material collected on the filter or, more commonly, by difference, based on determinations of(1) dissolved and (2) total concentrations of the constituent. (See also “Suspended”)
Suspended solids, total residue at 105 °C concentration is

the concentration of inorga nic and organic material retained on a filter, expressed as milligrams of dry material per liter of water (mg/L). An aliquot of the sample is used for this analysis.
Synoptic studies are short-term investigations of specific

water-quality conditions during selected seasonal or hydrologic periods to provide improved spatial resolution forcritical water-quality conditions. For the period and conditions sampled, they assess the spatial distribution of selected water-quality conditions in relation to causative factors, such as land use and contaminant sources.

Taxa richness is the total number of distinct species or

groups and usually decreases with pollution. (See also “Percent Shading”)
Taxonomy is the division of biology concerned with the

classification and naming of organisms. The classificationof organisms is based upon a hierarchical scheme beginning with Kingdom and ending with Species at the base. The higher the classification level, the fewer features the organisms have in common. For example, the taxonomy of a particular mayfly, Hexagenia limbata, is the following:
Kingdom: Animal Phylum: Arthropoda Class: Insecta Order: Ephemeroptera Family: Ephemeridae Genus: Hexagenia Species: Hexagenia limbata
Temperature preferences:

Cold – preferred water temperature for the species is less

than 20 °C or spawning temperature preference less than16 °C and native distribution is considered to be predominantly north of 45° N. latitude. Warm – preferred water temperatures for the species is greater than 20 °C or spawning temperature preference greater than 16 °C and native distribution is considered to be predominantly south of 45° N. latitude.
Cool – intermediate between cold and warm water temperature preferences.
Thermograph is an instrument that continuously records

variations of temperature on a chart. The more generalterm “temperature recorder’ is used in the table descriptions and refers to any instrument that records temperature whether on a chart, a tape, or any other medium.
Time-weighted average is computed by multiplying the

number of days in the sampling period by the concentrations of individual constituents for the corresponding period and dividing the sum of the products by the total number of days. A time-weighted average represents the composition of water resulting from the mixing of flow proportionally to the duration of the concentration.
Tons per acre-foot (T/acre-ft) is the dry mass (tons) of a

constituent per unit volume (acre-foot) of water. It is computed by multiplying the concentration of the constituent, in milligrams per liter, by 0.00136.
Tons per day (T/DAY, tons/d) is a common chemical or sediment discharge unit. It is the quantity of a substance in solution, in suspension, or as bedload that passes a stream section during a 24-hour period. It is equivalent to 2,000 pounds per day, or 0.9072 metric tons per day.

Total is the amount of a given constituent in a representative

whole-water (unfiltered) sample, regardless of the constituent’s physical or chemical form. This term is used only when the analytical procedure assures measurement of atleast 95 percent of the constituent present in both the dissolved and suspended phases of the sample. A knowledge of the expected form of the constituent in the sample, as well as the analytical methodology used, is required to judge when the results should be reported as “total.” (Note that the word “total” does doub le duty here, indicating both that the sample consists of a water-suspended sediment mixture and that the analytical method determined at least 95 percent of the constituent in the sample.)

Total coliform bacteria are a particular group of bacteria

that are used as indicators of possible sewage pollution. This group includes coliforms that inhabit the intestine of warm-blooded animals and those that inhabit soils. They are characterized as aerobic orfacultative anaerobic, gramnegative, nonspore-forming, rod-shaped bacteria that ferment lactose with gas formation within 48 hours at 35 ° C. In the laboratory, these bact eria are defined as all the organisms that produce col onies with a golden-green metallic sheen within 24 hours when incubated at 35 ° C plus or minus 1.0 ° C on M-Endo medium (nutrient medium for bacterial growth). Their concentrations are

## WATER RESOURCES DATA FOR FLORIDA, 2001 37 Volume 4: Northwest Florida

expressed as number of colonies per 100 mL of sample. (See also “Bacteria”)
Total discharge is the quantity of a given constituent, measured as dry mass or volume, that passes a stream cross section per unit of time. When referring to constituents other than water, this term needs to be qualified, such as “total sediment discharge,” “t otal chloride discharge,” and

so on.

Total in bottom material is the amount of a given constituent in a representative sample of bottom material. This term is used only when the analytical procedure assuresmeasurement of at least 95 percent of the constituent determined. A knowledge of the expected form of the constituent in the sample, as well as the analytical methodology used, is required to judge when the results should be reported as “total in bottom material.”
Total length (fish) is the straight-lin e distance from the anterior point of a fish specimen’s snout, with the mouth closed, to the posterior end of the caudal (tail) fin, with the lobes of the caudal fin squeezed together.

Total load refers to all of a constituent in transport. When

referring to sediment, it includes suspended load plus bed load.
Total organism count is the number of organisms collected

and enumerated in any particular sample. (See also “Organism count/volume.”)

Total recoverable is the amount of a given constituent in a

whole-water sample after a sample has been digested by a method (usually using a dilute acid solution) that results in dissolution of only readily soluble substances. Complete dissolution of all particulate matter is not achieved by the digestion treatment, and thus the determination represents something less than the “total” amount (that is, less than 95 percent) of the constituent present in the dissolved and suspended phases of the sample. To achieve comparability of analytical data for whol e-water samples, equivalentdigestion procedures are required of all laboratories performing such analyses because different digestion procedures may produce different analytical results.
Total sediment discharge is the mass of suspendedsediment plus bed-load transport, measured as dry weight, that passes a cross section in a given time. It is a rate and isreported as tons per day. (See also “Sediment,” “Suspended sediment,” “Suspended-Sediment Concentration,” “Bedload,” and “Bedload discharge”)

Total sediment load or total load is the sediment in transport

as bedload and suspended-sediment load. The term may be qualified, such as “annual suspended-sediment load” or “sand-size suspended-sediment load,” and so on. It differs from total sediment discharge in that load refers to thematerial whereas discharge refers to the quantity of material, expressed in units of mass per unit time. (See also “Sediment,” “Suspended-Sed iment Load,” and “Total load”)
Trophic group:

Filter feeder – diet composed of suspended plant and/or

animal material.
Herbivore – diet composed predominantly of plant material.
Invertivore – diet composed predominantly of invertebrates.
Omnivore – diet composed of at least 25-percent plant and

25-percent animal material.

Piscivore – diet composed predominantly of fish.
Turbidity is the reduction in the transparency of a solution

due to the presence of suspended and some dissolved substances. The measurement tech nique records the collectiveoptical properties of the solution that cause light to be scattered and attenuated rather than transmitted in straight lines; the higher the intensity of scattered or attenuated light, the higher the value of the turbidity. Turbidity is expressed in nephelometric turbidity units (NTU). Depending on the method used, the turbidity units as NTUcan be defined as the intensity of light of a specified wavelength scattered or attenuated by suspended particles or absorbed at a method specified angle, usually 90 degrees, from the path of the incident light. Currently approved methods for the measurement of turbidity in the USGS include those that conform to EPA Method 180.1, ASTM D1889-00, and ISO 7027. Measurements of turbidity by these different methods and different instruments are unlikely to yield equivalent values. Consequently, the method of measurement and type of instrument used to derive turbidity records should be included in the “REMARKS” column of the Annual Data Report.
Ultraviolet (UV) absorbance (absorption) at 254 or

280 nanometers is a measure of the aggregate concentration of the mixture of UV absorbing organic materials dissolved in the analyzed water, such as lignin, tannin, humicsubstances, and various aromatic compounds. UV absorbance (absorption) at 254 or 280 nanometers is measured in UV absorption units per centimeter of pathlength of UV light through a sample.

Vertical datum (See “Datum”)
Volatile organic compounds (VOCs) are organic compounds that can be isolated from the water phase of a sample by purging the water sample with inert gas, such ashelium, and subsequently analyzed by gas chromatography. Many VOCs are human-made chemicals that are used and produced in the manufacture of paints, adhesives, petroleum products, pharmaceuticals, and refrigerants. They are often components of fuels, solvents, hydraulic fluids, paint thinners, and dry cleaning agents commonlyused in urban settings. VOC contamination of drinkingwater supplies is a human health concern because many are

## 38 WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

toxic and are known or suspected human carcinogens (U.S. Environmental Protection Agency, 1996).

Water table is the level in the saturated zone at which the

pressure is equal to the atmospheric pressure.
Water-table aquifer is an unconfined aquifer within which

is found the water table.
Water year in USGS reports dealing with surface-water

supply is the 12-month period October 1 through September 30. The water year is designated by the calendar year in which it ends and which includes 9 of the 12 months. Thus, the year ending September 30, 2001, is called the “2001 water year.”

WDR is used as an abbreviation for “Water-Data Report” in

the REVISED RECORDS paragraph to refer to State annual hydrologic-data reports. (WRD was used as anabbreviation for “Water-Resources Data” in reports published prior to 1976.)
Weighted average is used in this report to indicate

discharge-weighted average. It is computed by multiplying the discharge for a sampling period by the concentrations of individual constituents for the corresponding period anddividing the sum of the products by the sum of the discharges. A discharge-weighted average approximates the composition of water that would be found in a reservoir containing all the water passing a given location during the water year after thorough mixing in the reservoir.

Wet mass is the mass of living matter plus contained water.

(See also “Biomass” and “Dry mass”)
Wet weight refers to the weight of animal tissue or other

substance including its contained water. (See also “Dry weight”)

WSP is used as an acronym for “Water-Supply Paper” in reference to previously published reports.
Zooplankton is the animal part of the plankton. Zooplankton are capable of extensive movements within the water column and are often large enough to be seen with theunaided eye. Zooplankton are secondary consumers feeding upon bacteria, phytoplankton, and detritus. Because they are the grazers in th e aquatic environment, the zooplankton are a vital part of the aquatic food web. The zooplankton community is dominated by small crustaceans and rotifers. (See also “Plankton”)

## WATER RESOURCES DATA FOR FLORIDA, 2001 39 

## Volume 4: Northwest Florida PUBLICATIONS ON TECHNIQUES OF WATER-RESOURCES INVESTIGATIONS

The U.S.G.S. publishes a series of manuals describing procedures for planning and conducting specialized work in waterresources investigations. The material is grouped under major subject headings called books and is further divided into section s and chapters. For example, section A of book 3 (Applications of Hydraulics) pertains to surface water. The chapter, the unit of publication, is limited to a narrow field of subject matter. This format permits flexibility in revision and publication as the need arises.
The reports listed below are for sale by the U.S.G.S., Information Services, Box 25286, Federal Center, Denver, Colorado 80225 (authorized agent of the Superintendent of Documents, Government Printing Office). Prepayment is required. Remittance should be made in the form of a check or money order payable to the “U.S. Geological Survey.” Prices are not included because they are subject to change. Current prices can be obtained by writing to the above address. When ordering or inquiring about prices for any of these publications, please give the title, booknumber, chapter number, and mention the “U.S. Geological Survey Techniques of Water-Resources Investigations.”

Book 1. Collection of Water Data by Direct Measurement
Section D. Water Quality

1-D1. Water temperature

— influential factors, field measurement, and data presentation , by H.H. Stevens, Jr., J.F. Ficke, and G.F. Smoot: USGS–TWRI book 1, chap. D1. 1975. 65 p.

1-D2. Guidelines for collection and field analysis of ground-water samples for selected unstable constituents , by W.W. Wood: USGS–TWRI book 1, chap. D2. 1976. 24 p.

Book 2. Collection of Environmental Data
Section D. Surface Geophysical Methods

2-D1. Application of surface geophysics to ground-water investigations, by A.A.R. Zohdy, G.P. Eaton, and D.R. Mabey: USGS–TWRI book 2, chap. D1. 1974. 116 p.

2-D2. Application of seismic-refraction techniques to hydrologic studies, by F.P. Haeni: USGS–TWRI book 2, chap. D2. 1988. 86 p.
Section E. Subsurface Geophysical Methods

2-E1. Application of borehole geophysics to water-resources investigations, by W.S. Keys and L.M. MacCary: USGS–TWRI book 2, chap. E1. 1971. 126 p.

2-E2. Borehole geophysics applied to ground-water investigations, by W.S. Keys: USGS–TWRI book 2, chap. E2. 1990. 150
p. Section F. Drilling and Sampling Methods

2-F1 . Application of drilling, coring, and sampling techniques to test holes and wells , by Eugene Shuter and W.E. Teasdale: USGS–TWRI book 2, chap. F1. 1989. 97 p.
Book 3. Applications of Hydraulics
Section A. Surface-Water Techniques

3-A1. General field and office procedures for indirect discharge measurements, by M.A. Benson and Tate Dalrymple: USGS– TWRI book 3, chap. A1. 1967. 30 p.

3-A2. Measurement of peak discharge by the slope-area method, by Tate Dalrymple and M.A. Benson: USGS–TWRI book 3, chap. A2. 1967. 12 p.

3-A3. Measurement of peak discharge at culverts by indirect methods, by G.L. Bodhaine: USGS–TWRI book 3, chap. A3. 1968. 60 p.

3-A4. Measurement of peak discharge at width contractions by indirect methods, by H.F. Matthai: USGS-TWRI book 3, chap. A4. 1967. 44 p.

3-A5. Measurement of peak discharge at dams by indirect methods, by Harry Hulsing: USGS–TWRI book 3. chap. A5. 1967. 29 p.

### 40 

## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

3-A6. General procedure for gaging streams, by R.W. Carter and Jacob Davidian: USGS–TWRI book 3, chap. A6. 1968. 13
p.
3-A7. Stage measurement at gaging stations, by T.J. Buchanan and W.P. Somers: USGS–TWRI book 3, chap. A7. 1968. 28 p.

3-A8. Discharge measurements at gaging stations, by T.J. Buchanan and W.P. Somers: USGS–TWRI book 3, chap. A8. 1969. 65 p.

3-A9. Measurement of time of travel in streams by dye tracing, by F.A. Kilpatrick and J.F. Wilson, Jr.: USGS–TWRI book 3, chap. A9. 1989. 27 p.

3-Al0. Discharge ratings at gaging stations, by E.J. Kennedy: USGS–TWRI book 3, chap. A10. 1984. 59 p.

3-A11. Measurement of discharge by the moving-boat method, by G.F. Smoot and C.E. Novak: USGS–TWRI book 3, chap. A11. 1969. 22 p.

3-A12. Fluorometric procedures for dye tracing , Revised, by J.F. Wilson, Jr., E.D. Cobb, and F.A. Kilpatrick: USGS–TWRI book 3, chap. A12. 1986. 34 p.

3-A13. Computation of continuous records of streamflow , by E.J. Kennedy: USGS–TWRI book 3, chap. A13. 1983. 53 p.

3-A14. Use of flumes in measuring discharge, by F.A. Kilpatrick and V.R. Schneider: USGS–TWRI book 3, chap. A14. 1983. 46 p.

3-A15. Computation of water-surface profiles in open channels, by Jacob Davidian: USGS–TWRI book 3, chap. A15. 1984. 48 p.

3-A16. Measurement of discharge using tracers , by F.A. Kilpatrick and E.D. Cobb: USGS–TWRI book 3, chap. A16. 1985. 52
p.
3-A17. Acoustic velocity meter systems, by Antonius Laenen: USGS–TWRI book 3, chap. A17. 1985. 38 p.

3-A18. Determination of stream reaeration coefficients by use of tracers, by F.A. Kilpatrick, R.E. Rathbun, Nobuhiro Yotsukura, G.W. Parker, and L.L. DeLong: USGS–TWRI book 3, chap. A18. 1989. 52 p.

3-A19. Levels at streamflow gaging stations , by E.J. Kennedy: USGS–TWRI book 3, chap. A19. 1990. 31 p.

3-A20. Simulation of soluble waste transport and buildup in surface waters using tracers

, by F.A. Kilpatrick: USGS–TWRI book 3, chap. A20. 1993. 38 p.

3-A21 Stream-gaging cableways, by C. Russell Wagner: USGS–TWRI book 3, chap. A21. 1995. 56 p. Section B. Ground-Water Techniques

3-B1. Aquifer-test design, observation, and data analysis, by R.W. Stallman: USGS–TWRI book 3, chap. B1. 1971. 26 p.

3-B2. Introduction to ground-water hydraulics, a programed text for self-instruction , by G.D. Bennett: USGS–TWRI book 3, chap. B2. 1976. 172 p.

3-B3. Type curves for selected problems of flow to wells in confined aquifers , by J.E. Reed: USGS–TWRI book 3, chap. B3. 1980. 106 p.

3-B4. Regression modeling of ground-water flow, by R.L. Cooley and R.L. Naff: USGS–TWRI book 3, chap. B4. 1990. 232
p.
3-B4. Supplement 1

. Regression modeling of ground-water flow - -Modifications to the computer code for nonlinear regression solution of steady-state ground-water flow problems, by R.L. Cooley: USGS–TWRI book 3, chap. B4. 1993. 8 p.

3-B5. Definition of boundary and initial conditions in the analysis of saturated ground-water flow systems—An introduction

, by O.L. Franke, T.E. Reilly, and G.D. Bennett: USGS–TWRI book 3, chap. B5. 1987. 15 p.

3-B6. The principle of superposition and its application in ground-water hydraulics, by T.E. Reilly, O.L. Franke, and G.D. Bennett: USGS–TWRI book 3, chap. B6. 1987. 28 p.

3-B7. Analytical solutions for one-, two-, and three-dimensional solute transport in ground-water systems with uniform flow, by E.J. Wexler: USGS–TWRI book 3, chap. B7. 1992. 190 p.

3-B8. System and boundary conceptualization in ground-water flow simulation, by T.E. Reilly: USGS–TWRI book 3, chap. B8. 2001. 29 p.

## WATER RESOURCES DATA FOR FLORIDA, 2001 41 

## Volume 4: Northwest Florida Section C. Sedimentation and Erosion Techniques

3-C1. Fluvial sediment concepts, by H.P. Guy: USGS–TWRI book 3, chap. C1. 1970. 55 p.

3-C2. Field methods for measurement of fluvial sediment , by T.K. Edwards and G.D. Glysson: USGS–TWRI book 3, chap. C2. 1999. 89 p.

3-C3. Computation of fluvial-sediment discharge, by George Porterfield: USGS–TWRI book 3, chap. C3. 1972. 66 p.
Book 4. Hydrologic Analysis and Interpretation
Section A. Statistical Analysis

4-A1. Some statistical tools in hydrology , by H.C. Riggs: USGS–TWRI book 4, chap. A1. 1968. 39 p.

4-A2. Frequency curves, by H.C. Riggs: USGS–TWRI book 4, chap. A2. 1968. 15 p.
Section B. Surface Water

4-B1. Low-flow investigations, by H.C. Riggs: USGS–TWRI book 4, chap. B1. 1972. 18 p.

4-B2. Storage analyses for water supply , by H.C. Riggs and C.H. Hardison: USGS–TWRI book 4, chap. B2. 1973. 20 p.

4-B3. Regional analyses of streamflow characteristics, by H.C. Riggs: USGS–TWRI book 4, chap. B3. 1973. 15 p.
Section D. Interrelated Phases of the Hydrologic Cycle

4-D1. Computation of rate and volume of stream depletion by wells , by C.T. Jenkins: USGS–TWRI book 4, chap. D1. 1970. 17 p.
Book 5. Laboratory Analysis
Section A. Water Analysis

5-A1. Methods for determination of inorganic substances in water and fluvial sediments, by M.J. Fishman and L.C. Friedman, editors: USGS–TWRI book 5, chap. A1. 1989. 545 p.

5-A2. Determination of minor elements in water by emission spectroscopy, by P.R. Barnett and E.C. Mallory, Jr.: USGS– TWRI book 5, chap. A2. 1971. 31 p.

5-A3. Methods for the determination of organic substances in water and fluvial sediments , edited by R.L. Wershaw, M.J. Fishman, R.R. Grabbe, and L.E. Lowe: USGS–TWRI book 5, chap. A3. 1987. 80 p.

5-A4. Methods for collection and analysis of aquatic biological and microbiological samples, by L.J. Britton and P.E. Greeson, editors: USGS–TWRI book 5, chap. A4. 1989. 363 p.

5-A5. Methods for determination of radioactive substances in water and fluvial sediments, by L.L. Thatcher, V.J. Janzer, and K.W. Edwards: USGS–TWRI book 5, chap. A5. 1977. 95 p.

5-A6 . Quality assurance practices for the chemical and biological analyses of water and fluvial sediments, by L.C. Friedman and D.E. Erdmann: USGS–TWRI book 5, chap. A6. 1982. 181 p.
Section C. Sediment Analysis

5-C1. Laboratory theory and methods for sediment analysis , by H.P. Guy: USGS–TWRI book 5, chap. C1. 1969. 58 p.
Book 6. Modeling Techniques

Section A. Ground Water

6-A1. A modular three-dimensional finite-difference ground-water flow model , by M.G. McDonald and A.W. Harbaugh: USGS–TWRI book 6, chap. A1. 1988. 586 p.

6-A2. Documentation of a computer program to simulate aquifer-system compaction using the modular finite-difference ground-water flow model, by S.A. Leake and D.E. Prudic: USGS–TWRI book 6, chap. A2. 1991. 68 p.

6-A3. A modular finite-element model (MODFE) for areal and axisymmetric ground-water-flow problems, Part 1: Model Description and User’s Manual, by L.J. Torak: USGS–TWRI book 6, chap. A3. 1993. 136 p.

6-A4. A modular finite-element model (MODFE) for areal and axisymmetric ground-water-flow problems, Part 2: Derivation of finite-element equations and comparisons with analytical solutions, by R.L. Cooley: USGS–TWRI book 6, chap. A4. 1992. 108 p.

### 42 

## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

6-A5. A modular finite-element model (MODFE) for areal and axisymmetric ground-water-flow problems, Part 3: Design philosophy and programming details, by L.J. Torak: USGS–TWRI book 6, chap. A5, 1993. 243 p.

6-A6. A coupled surface-water and ground-water flow model (MOD BRANCH) for simulation of stream-aquifer interaction

, by Eric D. Swain and Eliezer J. Wexler: USGS–TWRI book 6, chap. A5,1996. 125 p.
Book 7. Automated Data Processing and Computations
Section C. Computer Programs

7-C1. Finite difference model for aquifer simulation in two dimensions with results of numerical experiments, by P.C. Trescott, G.F. Pinder, and S.P. Larson: USGS–TWRI book 7, chap. C1. 1976. 116 p.

7-C2. Computer model of two-dimensional solute transport and dispersion in ground water , by L.F. Konikow and J.D. Bredehoeft: USGS–TWRI book 7, chap. C2. 1978. 90 p.

7-C3. A model for simulation of flow in singular and interconnected channels, by R.W. Schaffranek, R.A. Baltzer, and D.E. Goldberg: USGS–TWRI book 7, chap. C3. 1981. 110 p.

Book 8. Instrumentation
Section A. Instruments for Measurement of Water Level

8-A1. Methods of measuring water levels in deep wells, by M.S. Garber and F.C. Koopman: USGS–TWRI book 8, chap. A1. 1968. 23 p.

8-A2. Installation and service manual fo r U.S. Geological Survey manometers , by J.D. Craig: USGS–TWRI book 8, chap. A2. 1983. 57 p.
Section B. Instruments for Measurement of Discharge

8-B2. Calibration and maintenance of vertical-axis type current meters, by G.F. Smoot and C.E. Novak: USGS–TWRI book 8, chap. B2. 1968. 15 p.
Book 9. Handbooks for Water-Resources Investigations
Section A. National Field Manual for the Collection of Water-Quality Data

9-A1. National Field Manual for the Collection of Water-Quality Data: Preparations for Water Sampling , by F.D. Wilde, D.B. Radtke, Jacob Gibs, and R.T. Iwatsubo: USGS–TWRI book 9, chap. A1. 1998. 47 p.

9-A2. National Field Manual for the Collection of Water-Quality Data: Selection of Equipment for Water Sampling , edited by F.D. Wilde, D.B. Radtke, Jacob Gibs, and R.T. Iwatsubo: USGS–TWRI book 9, chap. A2. 1998. 94 p.

9-A3. National Field Manual for the Collection of Water-Quality Data: Cleaning of Equipment for Water Sampling , edited by F.D. Wilde, D.B. Radtke, Jacob Gibs, and R.T. Iwatsubo: USGS–TWRI book 9, chap. A3. 1998. 75 p.

9-A4. National Field Manual for the Collection of Water-Quality Data: Collection of Water Samples , edited by F.D. Wilde, D.B. Radtke, Jacob Gibs, and R.T. Iwatsubo: USGS–TWRI book 9, chap. A4. 1999. 156 p.

9-A5. National Field Manual for the Collection of Water-Quality Data: Processing of Water Samples , edited by F.D. Wilde, D.B. Radtke, Jacob Gibs, and R.T. Iwatsubo: USGS–TWRI book 9, chap. A5. 1999, 149 p.

9-A6. National Field Manual for the Collection of Water-Quality Data: Field Measurements , edited by F.D. Wilde and D.B. Radtke: USGS–TWRI book 9, chap. A6. 1998. Variously paginated.

9-A7. National Field Manual for the Collection of Water-Quality Data: Biological Indicators , edited by D.N. Myers and F.D. Wilde: USGS–TWRI book 9, chap. A7. 1997 and 1999. Variously paginated.

9-A8. National Field Manual for the Collection of Water-Quality Data: Bottom-material samples , by D.B. Radtke: USGS– TWRI book 9, chap. A8. 1998. 48 p.

9-A9. National Field Manual for the Collection of Water-Quality Data: Safety in Field Activities , by S.L. Lane and R.G. Fay: USGS–TWRI book 9, chap. A9. 1998. 60 p.

# S T AG E

, DISCHARGE, AND W A

TER QUAL I T Y OF STREAMS

### 44 

## WATER RESOURCES DATA FOR FLORIDA, 2001 Volume 4: Northwest Florida

0 20 40 60 MILES 

### LOCATION MAP 02358000

02359000

02330000

02327100

02326900 02327033

02359170 02365500

02365769 02366996 02365470

02359500

02359315

02358784

02358789 02365200

02366500 02329000

02330400 02359051 02329900 02329600
02329200 02330100

02330150 02358700 02375500 02376393

02369000 02376500

02376115 02376033 02370500 02368000 02368500 02367900

02376100

02329200 02376100 

### STREAM GAGING STATION

LAKE GAGING STATION 

## EXPLANATION 02328522 02370700 02370000 0 20 40 60 MILES 

### LOCATION MAP 02358000

02359000

02330000

02327100

02326900 02327033

02359170 02365500

02365769 02366996 02365470

02359500

02359315

02358784

02358789 02365200

02366500 02329000

02330400 02359051 02329900 02329600
02329200 02330100

02330150 02358700 02375500 02376393

02369000 02376500

02376115 02376033 02370500 02368000 02368500 02367900

02376100

02329200 02376100 

### STREAM GAGING STATION

LAKE GAGING STATION 

## EXPLANATION 02328522 02370700 02370000



## Figure 11. Location of stream gaging and lake gaging stations in Northwest Florida Water Management District.

0 20 40 MILES



### LOCATION MAP 

### 02319394 02319000

02319500

02319800

02320000 02326000 02324400

02325000

02324000 02322800

02323000



### 02323592

02313700

02315000 

### 02317620

02321000 

### 02326500
02315500

02322500 02321500

02321975

STREAM GAGING STATION 

### EXPLANATION

02323500 02320500

02323500



## Figure 12. Location of stream gaging stations in Suwannee River Water Management District.45 WACCASASSA RIVER BASIN

02313700 WACCASASSA RIVER NEAR GULF HAMMOCK, FL

LOCATION.--Lat 29 ° 12'14", long 82 ° 46'09" in SW sec. 2, T. 15 S., R.15 E., Levy County, Hydrologic Unit 03110101, near right bank at abandoned railroad grade, 0.5 mi upstream from Otter Creek, 3.6 mi upstream from mouth, and 4 mi southwest of Gulf Hammock.

DRAINAGE AREA.--480 mi 2 , approximately, including that of Otter Creek.

PERIOD OF RECORD.--March 1963 to September 1978, November 1980 to September 1984 (fragmentary), October 1984 to September 1992, October 1998 to current year.

REVISED RECORDS.--WSP 2105: 1969. WRD FL-72-1: Drainage area.

GAGE.--Water-stage and water-current meter recorders. Datum of gage is 10.51 ft below National Geodetic Vertical Datum of 1929. Prior to Nov. 24, 1980, water-stage and deflection-meter recorders at same site at datum 10.00 ft higher.

REMARKS.--Records poor. Flow affected by tide. Discharge computed from continuous velocity record obtained from water-current meter. Records include flow of Otter Creek. Above bankfull stage, discharge measurements are made along abandoned railroad fill and include all flow from about 1.5 mi northwest to 0.8 mi northeast of gaging station.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 298 -57 -40 -39 142 55 125 -154 -47 165 669 69 2 247 -53 -68 107 168 3.4 67 -88 37 272 631 59 3 231 -19 153 48 121 -313 -30 9.1 48 194 545 52 4 -85 -64 156 26 -2.1 -7.5 130 -9.2 9.7 155 638 76 5 -100 -98 -22 -266 73 370 57 -39 7.3 145 677 98

6 127 -178 -174 -82 92 78 39 -68 6.8 153 769 118 7 197 -75 -176 -153 91 55 -.52 -57 -1.4 127 620 59 8 261 -169 -204 -93 74 75 -21 -54 18 140 508 73 9 224 -309 -177 81 65 14 -48 -157 3.9 93 448 99 10 139 62 -196 -72 63 128 -49 -188 28 199 351 112

11 52 -25 -252 -78 53 37 -108 -115 -130 176 353 81 12 63 -38 -250 -64 38 -42 -19 -115 -47 162 292 98 13 59 -130 -268 -62 1.4 305 -33 -90 23 225 243 185 14 24 -40 -267 -85 71 206 -4.4 -74 -49 288 219 282 15 -6.8 8.3 -223 -95 27 -73 -86 -81 -75 207 283 223

16 -6.1 -98 -381 -92 -23 212 38 -143 31 198 243 180 17 -13 -128 -39 -112 171 138 39 -123 87 195 201 152 18 -4.6 -12 -52 -189 122 166 34 -38 91 237 140 74 19 -27 -59 -128 -211 -22 156 -33 -23 74 279 71 36 20 18 101 -16 228 110 202 -23 -21 53 183 102 13

21 -36 204 -142 19 91 299 -6.2 -59 38 216 89 12 22 20 10 40 77 58 159 -14 -97 146 255 151 58 23 99 -19 28 69 135 166 -58 -87 344 -1310 150 61 24 25 -224 -41 -37 57 123 -87 -104 e198 1660 136 78 25 -3.7 -135 65 49 82 70 -53 -146 e35 890 143 236

26 -38 40 -101 6.1 74 77 19 -124 -98 970 125 233 27 -13 21 -214 1.2 84 88 -14 -110 148 983 115 207 28 -29 17 -306 -12 56 55 -74 -123 121 869 220 169 29 -17 -9.7 72 -37 --- -285 -39 -106 78 803 152 245 30 -1.0 32 6.6 -85 --- 272 -59 -70 149 844 118 110 31 -2.3 --- 38 53 --- 175 --- -90 --- 783 55 ---

MEAN 54.9 -48.1 -103 -35.5 74.0 95.6 -10.4 -88.5 44.2 347 305 118 MAX 298 204 156 228 171 370 130 9.1 344 1660 769 282 MIN -100 -309 -381 -266 -23 -313 -108 -188 -130 -1310 55 12 IN. .13 -.11 -.25 -.09 .16 .23 -.02 -.21 .10 .83 .73 .27

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1963 - 2001, BY WATER YEAR (WY)

MEAN 204 132 176 260 371 354 204 110 144 239 486 396 MAX 771 359 485 707 964 909 814 428 709 1169 1724 2355 (WY) 1966 1986 1965 1965 1965 1978 1970 1964 1966 1964 1965 1964 MIN 46.0 -48.1 -103 -35.5 74.0 59.8 -10.4 -88.5 32.7 55.5 -16.8 29.1 (WY) 1985 2001 2001 2001 2001 1985 2001 2001 1967 1977 1989 1991

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1963 - 2001

ANNUAL MEAN 146 63.1 274 HIGHEST ANNUAL MEAN 629 1965 LOWEST ANNUAL MEAN 63.1 2001 HIGHEST DAILY MEAN 1700 Sep 19 1660 Jul 24 11400 Sep 12 1964 LOWEST DAILY MEAN -391 Apr 24 -1310 Jul 23 -2310 Aug 31 1985 ANNUAL SEVEN-DAY MINIMUM -262 Dec 10 -262 Dec 10 -262 Dec 10 2000 MAXIMUM PEAK FLOW 3590 Jul 24 12200 Sep 12 1964 MAXIMUM PEAK STAGE 15.00 Jul 23 16.96 Sep 12 1964 ANNUAL RUNOFF (INCHES) 4.15 1.79 7.75 10 PERCENT EXCEEDS 395 243 577 50 PERCENT EXCEEDS 102 38 153 90 PERCENT EXCEEDS -54 -123 27

e Estimated46 SUWANNEE RIVER BASIN

0231427398 ALLIGATOR CREEK NEAR FARGO, GA

LOCATION.--Lat 30 ° 48'02", long 82 ° 30'38", Clinch County, Hydrologic Unit 03110201, on upstream side of concrete bridge on Perimeter Road in Superior Forest (private property), and 8.5 mi northeast of Fargo.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD.--November 1998 to current year, gage height only.

GAGE.--Water-stage recorder.

REMARKS.--No estimated daily gage heights. Records fair.

EXTREMES FOR PERIOD OF RECORD.--Maximum gage height, 5.77 ft, Jan. 17, 2001; minimum gage height, 1.59 ft, June 24, 1999.

EXTREMES FOR CURRENT YEAR.--Maximum gage height, 5.77 ft, Jan. 17; minimum gage height, 2.70 ft, Nov. 24.

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 3.65 3.04 2.85 --- --- 3.32 4.40 4.09 3.32 4.55 4.64 4.29 2 3.64 3.01 2.84 --- --- 3.32 4.41 4.07 3.32 4.57 4.65 4.34 3 3.62 2.99 2.84 --- --- 3.32 4.42 4.05 3.28 4.56 4.66 4.42 4 3.60 2.97 2.82 --- --- 3.54 4.43 4.02 3.23 4.56 4.61 4.38 5 3.59 2.94 2.81 2.81 --- 3.61 4.44 4.00 3.18 4.58 4.60 4.36

6 3.58 2.91 2.81 3.51 --- 3.61 4.44 3.98 3.14 4.60 4.64 4.34 7 3.60 2.89 2.81 2.81 --- 3.60 4.43 3.96 3.11 4.59 4.68 4.33 8 3.59 2.87 2.79 --- --- 3.59 4.42 3.94 3.07 4.63 4.65 4.31 9 3.57 2.84 2.79 --- --- 3.58 4.41 3.92 3.12 4.58 4.62 4.29 10 3.56 2.82 2.80 --- --- 3.63 4.40 3.90 3.42 4.54 4.59 4.27

11 3.54 2.80 2.79 4.82 --- 3.63 4.38 3.87 3.62 4.51 4.57 4.25 12 3.52 2.78 2.79 3.46 --- 3.62 4.37 3.85 4.32 4.48 4.54 4.26 13 3.51 2.74 2.78 4.30 --- 3.91 4.35 3.83 4.48 4.47 4.51 4.26 14 3.48 2.79 2.77 2.81 --- 3.90 4.34 3.81 4.46 4.54 4.52 4.25 15 3.46 2.80 2.76 4.17 --- 3.90 4.33 3.78 4.44 4.54 4.56 4.24

16 3.44 2.79 2.75 2.81 --- 3.90 4.34 3.75 4.40 4.52 4.55 4.22 17 3.42 2.78 2.75 2.99 --- 3.88 4.31 3.72 4.36 4.50 4.53 4.20 18 3.39 2.77 2.73 3.61 --- 3.99 4.29 3.69 4.42 4.47 4.51 4.18 19 3.37 2.77 2.81 4.13 --- 4.02 4.27 3.65 4.51 4.45 4.51 4.16 20 3.35 2.78 4.26 3.43 --- 4.19 4.25 3.62 4.46 4.44 4.49 4.14

21 3.32 2.76 2.81 2.81 3.40 4.21 4.23 3.58 4.43 4.45 4.48 4.12 22 3.29 2.74 --- 2.81 3.40 4.19 4.22 3.55 4.42 4.45 4.47 4.11 23 3.27 2.72 --- 2.81 3.40 4.17 4.20 3.50 4.41 4.46 4.45 4.14 24 3.24 2.72 2.81 2.81 3.39 4.18 4.18 3.46 4.40 4.49 4.43 4.14 25 3.22 2.83 2.81 2.81 3.38 4.23 4.18 3.42 4.39 4.48 4.41 4.18

26 3.20 2.87 2.81 2.81 3.37 4.28 4.18 3.39 4.39 4.52 4.39 4.17 27 3.17 2.88 4.47 3.22 3.35 4.31 4.17 3.34 4.40 4.51 4.37 4.16 28 3.15 2.87 2.81 2.81 3.33 4.32 4.14 3.31 4.42 4.50 4.35 4.14 29 3.11 2.87 4.21 2.81 --- 4.35 4.12 3.32 4.45 4.48 4.33 4.12 30 3.09 2.86 --- --- --- 4.38 4.10 3.37 4.49 4.54 4.31 4.10 31 3.06 --- --- --- --- 4.39 --- 3.34 --- 4.65 4.29 ---

MEAN 3.41 2.84 --- --- --- 3.91 4.30 3.71 4.00 4.52 4.51 4.23 MAX 3.65 3.04 --- --- --- 4.39 4.44 4.09 4.51 4.65 4.68 4.42 MIN 3.06 2.72 --- --- --- 3.32 4.10 3.31 3.07 4.44 4.29 4.1047 SUWANNEE RIVER BASIN

0231427399 BAY CREEK NEAR FARGO, GA

LOCATION.--Lat 30 ° 47'37", long 82 ° 26'27", Clinch County, Hydrologic Unit 03110201, on right bank, 0.5 mi northeast of Perimeter Road in Superior Forest (private property), and about 10.5 mi northeast of Fargo.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD.--November 1998 to current year, gage height only.

GAGE.--Water-stage recorder.

REMARKS.--No estimated daily gage heights. Records fair.

EXTREMES FOR PERIOD OF RECORD.--Maximum gage height, 4.60 ft, Feb. 8, 1999; minimum gage height, .04 ft, Jan. 29-30, 2001.

EXTREMES FOR CURRENT YEAR.--Maximum gage height, 3.86 ft, Mar. 29; minimum gage height, .04 ft, Jan. 29-30.

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 1.32 .43 .43 --- .10 --- 3.72 .43 .46 1.77 2.68 .50 2 1.20 .43 .43 --- --- --- 3.62 .43 .46 2.30 2.96 .50 3 1.09 .43 .43 --- .08 --- 3.51 .43 .46 2.68 3.13 .50 4 .97 .43 .43 --- --- .44 3.35 .43 .46 2.69 3.09 .50 5 .87 .43 .43 .66 .36 .59 3.25 .43 .46 2.61 3.13 .50

6 .80 .43 .44 .71 .42 .73 3.30 .43 .49 2.65 3.62 .50 7 .83 .43 .44 .69 .43 .71 3.13 .43 .46 2.56 3.50 .52 8 .76 .43 .43 .65 .47 .71 2.92 .43 .46 2.39 3.21 .76 9 .53 .43 .50 --- .32 .70 2.67 .43 .57 2.19 2.88 .91 10 .45 .43 .46 --- .34 .73 2.47 .43 .68 1.95 2.55 1.00

11 .45 .43 .42 .41 .27 .71 2.30 .44 .75 1.69 2.23 1.04 12 .45 .43 .42 --- .22 .70 2.05 .44 2.15 1.46 1.94 1.10 13 .45 .43 .41 .36 .33 1.38 1.90 .44 2.15 1.33 1.67 1.07 14 .45 .44 .41 .46 .43 1.11 1.78 .44 1.61 1.40 1.43 .97 15 .45 .43 .40 .47 .48 1.14 1.64 .44 1.41 1.51 1.35 .88

16 .45 .43 .42 .60 .53 1.25 1.78 .44 1.24 1.86 1.26 .76 17 .44 .43 .51 .57 .51 1.32 1.89 .44 1.12 2.05 1.13 .61 18 .43 .43 .39 .46 .43 1.70 1.11 .44 1.36 1.96 .98 .52 19 .43 .43 --- .53 .33 2.14 .75 .44 1.70 1.71 1.04 .51 20 .43 .43 --- .41 .35 2.84 .71 .44 1.46 1.40 .95 .51

21 .43 .43 .38 --- .39 3.25 .69 .45 1.36 1.25 .81 .51 22 .43 .43 .38 --- --- 3.42 .68 .45 1.45 1.08 .66 .51 23 .43 .43 .37 .38 --- 3.56 .66 .45 1.60 .94 .58 .51 24 .43 .47 .37 .26 --- 3.66 .63 .45 1.63 1.06 .50 .51 25 .43 .51 .37 --- --- 3.72 .66 .45 1.52 .91 .50 .51

26 .43 .43 .36 .25 --- 3.79 .68 .45 1.34 1.03 .50 .51 27 .43 .43 .36 .33 --- 3.78 .63 .45 1.18 1.38 .50 .51 28 .43 .43 .50 .44 --- 3.78 .49 .45 1.04 1.48 .50 .51 29 .43 .43 .35 .33 --- 3.84 .42 .46 .94 1.64 .50 .51 30 .43 .43 --- .28 --- 3.83 .43 .45 .97 1.87 .50 .51 31 .43 --- --- .09 --- 3.79 --- .47 --- 2.33 .50 ---

MEAN .58 .43 --- --- --- --- 1.79 .44 1.10 1.78 1.64 .64 MAX 1.32 .51 --- --- --- --- 3.72 .47 2.15 2.69 3.62 1.10 MIN .43 .43 --- --- --- --- .42 .43 .46 .91 .50 .5048 SUWANNEE RIVER BASIN

02314274 SUWANNEE RIVER AT SILL NEAR FARGO, GA

LOCATION.--Lat 30 ° 48'14", long 82 ° 25'03", in Okefenokee National Wildlife Refuge and Wilderness Area, Charlton County, Hydrologic Unit 03110201, at southern control structure on Okefenokee Swamp Sill, and 12 mi northeast of Fargo.

DRAINAGE AREA.--Indeterminate.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1998 to current year.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929.

REMARKS.--No estimated daily discharges. Records fair.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 180 22 19 22 22 23 216 46 5.0 242 338 53 2 167 21 19 22 22 23 217 43 4.8 294 376 53 3 154 21 20 22 21 23 216 39 4.5 333 395 63 4 143 20 21 22 21 22 218 36 4.3 328 383 69 5 134 19 22 22 21 22 227 33 4.0 318 394 71

6 126 19 23 22 21 22 237 30 3.9 326 464 98 7 124 18 23 22 21 22 229 28 3.6 311 431 110 8 118 17 23 22 21 22 215 26 3.4 290 386 125 9 110 17 23 22 22 22 202 24 4.1 264 342 134 10 103 16 23 22 22 22 194 22 5.4 234 300 139

11 97 16 23 22 22 22 186 21 6.0 207 264 143 12 91 15 23 22 22 22 170 19 164 183 230 150 13 87 15 23 22 22 20 164 18 188 171 201 147 14 83 15 23 22 22 20 161 17 136 180 177 138 15 78 15 23 22 22 20 158 16 115 198 170 130

16 74 14 23 22 22 23 228 15 102 240 161 123 17 71 14 23 22 22 26 238 14 93 256 149 115 18 66 14 23 22 22 41 156 13 111 240 135 108 19 60 14 23 22 22 56 132 12 156 210 144 101 20 52 15 23 21 22 92 116 11 146 175 134 95

21 43 15 23 22 22 120 104 9.9 152 163 125 88 22 39 15 23 22 22 134 94 9.1 174 147 116 85 23 36 15 23 22 22 147 86 8.3 194 137 108 85 24 33 15 23 22 22 156 78 7.5 197 147 100 85 25 30 16 23 22 22 163 75 7.0 184 132 92 87

26 29 16 23 22 22 171 73 6.6 166 146 85 86 27 27 17 23 22 22 179 67 6.0 153 174 78 83 28 26 17 23 22 23 190 60 5.6 142 194 72 81 29 25 18 23 22 --- 202 55 5.5 134 214 66 77 30 24 18 22 22 --- 209 51 5.2 141 242 61 73 31 23 --- 22 22 --- 213 --- 4.9 --- 293 57 ---

MEAN 79.1 16.6 22.5 22.0 21.8 79.0 154 18.0 96.6 225 211 99.8 MAX 180 22 23 22 23 213 238 46 197 333 464 150 MIN 23 14 19 21 21 20 51 4.9 3.4 132 57 53

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 540 126 68.7 103 208 139 107 31.8 39.1 116 116 87.8 MAX 1462 316 147 244 543 278 154 45.4 96.6 225 211 117 (WY) 1999 1999 1999 1999 1999 1999 2001 2000 2001 2001 2001 2000 MIN 78.8 16.6 22.5 22.0 21.8 59.7 69.1 18.0 9.18 54.0 62.9 46.5 (WY) 2000 2001 2001 2001 2001 2000 2000 2001 1999 2000 1999 1999

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 54.7 87.6 140 HIGHEST ANNUAL MEAN 275 1999 LOWEST ANNUAL MEAN 58.4 2000 HIGHEST DAILY MEAN 212 Sep 26 464 Aug 6 1840 Oct 12 1998 LOWEST DAILY MEAN 3.0 Jun 15 3.4 Jun 8 3.0 Jun 15 2000 ANNUAL SEVEN-DAY MINIMUM 3.7 Jun 10 4.0 Jun 3 3.7 Jun 10 2000 MAXIMUM PEAK FLOW 469 Aug 6 1840 Oct 12 1998 MAXIMUM PEAK STAGE 109.97 Mar 28 INSTANTANEOUS LOW FLOW 3.3 Jun 8 2.8 Jun 14 2000 10 PERCENT EXCEEDS 95 215 289 50 PERCENT EXCEEDS 52 33 62 90 PERCENT EXCEEDS 15 15 1549 SUWANNEE RIVER BASIN

02314274 SUWANNEE RIVER AT SILL NEAR FARGO, GA--Continued

PERIOD OF RECORD.--February 1999 to current year.

REMARKS.--Water Quality sample collected on Mar. 28, 2001 at 11:30AM was taken after control gates opened.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001

BARO- PH PH RESIDUE NITRO

- METRIC SPE- WATER WATER TOTAL NITRO- NITRO- GEN,AM

- PRES- COLOR CIFIC WHOLE WHOLE AT 105 GEN, GEN, MONIA + TEMPER- SURE (PLAT- CON- OXYGEN, FIELD LAB DEG. C, AMMONIA NITRITE ORGANI C ATURE (MM GAGE INUM- DUCT- DIS- (STAND- (STAND- SUS- TOTAL TOTAL TOTAL DATE TIME WATER OF HEIGHT COBALT ANCE SOLVED ARD ARD PENDED (MG/L (MG/L (MG/L (DEG C) HG) (FEET) UNITS) (US/CM) (MG/L) UNITS) UNITS) (MG/L) AS N) AS N) AS N) (00010) (00025) (00065) (00080) (00095) (00300) (00400) (00403) (00530) (00610) (00615) (00625 )

FEB 01... 1212 12.7 765 111.43 200 93 9.0 3.7 3.9 9 .05 E.01 1.2 MAR 28... 1045 14.8 766 109.89 280 82 7.8 3.9 3.9 4 .01 <.01 1.1 28... 1130 14.7 766 109.91 280 84 5.9 3.8 3.9 13 <.01 <.01 1.2 MAY 02... 1230 23.5 766 105.94 280 89 8.8 3.8 3.8 17 .04 <.01 1.5 AUG 23... 1300 28.5 765 107.15 320 96 -- 3.6 3.8 13 .05 <.01 1.7

CARBON, NITRO- CARBON, ORGANIC MAGNE- POTAS- CHLO- FLUO- SILICA, GEN, PHOS- ORGANIC PARTIC- CALCIUM SIUM, SODIUM, SIUM, RIDE, SULFATE RIDE, DIS- ARSENI C NO2+NO3 PHORUS DIS- ULATE DIS- DIS- DIS- DIS- DIS- DIS- DIS- SOLVED DIS- TOTAL TOTAL SOLVED TOTAL SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED (MG/L SOLVE D DATE (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L AS (UG/L AS N) AS P) AS C) AS C) AS CA) AS MG) AS NA) AS K) AS CL) AS SO4) AS F) SIO2) AS AS ) (00630) (00665) (00681) (00689) (00915) (00925) (00930) (00935) (00940) (00945) (00950) (00955) (01000 )

FEB 01... <.02 <.020 43 -- .66 .500 3.9 <.10 6.7 .4 <.1 10.0 <1.0 MAR 28... <.02 <.020 43 .6 .71 .500 2.4 <.10 6.2 .5 <.1 7.9 <1.0 28... <.02 <.020 44 >5.0 .77 .500 2.3 <.10 6.3 .5 <.1 8.1 <1.0 MAY 02... <.02 <.020 52 2.9 .73 .500 4.1 <.10 6.9 .2 <.1 9.6 <1.0 AUG 23... <.02 <.020 56 .7 .81 .640 4.6 <.10 6.8 <.2 <.1 8.8 <1.0

BERYL- CHRO- BERYL- LIUM, CADMIUM MIUM, COPPER, LEAD, NICKEL
, LIUM, TOTAL CADMIUM WATER TOTAL COPPER, TOTAL IRON, LEAD, TOTAL NICKEL, TOTAL ARSENIC DIS- RECOV- DIS- UNFLTRD RECOV- DIS- RECOV- DIS- DIS- RECOV- DIS- RECOV

- TOTAL SOLVED ERABLE SOLVED TOTAL ERABLE SOLVED ERABLE SOLVED SOLVED ERABLE SOLVED ERABL E DATE (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L AS AS) AS BE) AS BE) AS CD) AS CD) AS CR) AS CU) AS CU) AS FE) AS PB) AS PB) AS NI) AS NI ) (01002) (01010) (01012) (01025) (01027) (01034) (01040) (01042) (01046) (01049) (01051) (01065) (01067 )

FEB 01... <1 <1.00 <1.00 <1.00 <1.00 1 <1.0 <1.0 290 1.00 1 <1.00 <1
MAR 28... <1 <1.00 <1.00 <1.00 <1.00 <1 <1.0 <1.0 270 <1.00 <1 <1.00 <1 28... <1 <1.00 <1.00 <1.00 <1.00 <1 1.2 <1.0 290 <1.00 <1 <1.00 <1
MAY 02... <1 <1.00 <1.00 <1.00 <1.00 <1 <1.0 <1.0 480 <1.00 <1 <1.00 <1 AUG 23... 3 <1.00 <1.00 <1.00 <1.00 5 <1.0 <1.0 990 <1.00 2 <1.00 <1

SOLIDS, SPE- STRON- VANA- SELE- RESIDUE PHOS- MERCURY CIFIC TIUM, DIUM, ZINC, NIUM, SELE- AT 180 PHORUS MERCURY TOTAL CON- DIS- DIS- DIS- DIS- NIUM, TANNIN DEG. C ORTHO DIS- RECOV- DUCT- SOLVED SOLVED SOLVED SOLVED TOTAL AND DIS- TOTAL SOLVED ERABLE ANCE DATE (UG/L (UG/L (UG/L (UG/L (UG/L LIGNIN SOLVED (MG/L (UG/L (UG/L LAB AS SR) AS V) AS ZN) AS SE) AS SE) (MG/L) (MG/L) AS P) AS HG) AS HG) (US/CM) (01080) (01085) (01090) (01145) (01147) (32240) (70300) (70507) (71890) (71900) (90095)

FEB 01... 5.00 <1.0 15 <1.0 <1.0 8.8 82 E.030 <.10 <.10 82 MAR 28... 6.00 <1.0 9 <1.0 <1.0 11 97 <.010 <.10 <.10 83 28... 6.00 <1.0 7 <1.0 <1.0 11 102 <.010 <.10 <.10 81 MAY 02... 7.00 <1.0 6 <1.0 <1.0 12 123 <.010 <.10 <.10 91 AUG 23... 8.50 <1.0 15 <1.0 <1.0 17 147 <.010 <.10 <.10 94

E Estimated < Actual value is known to be less than the value shown. > Actual value is known to be more than the value shown.50 SUWANNEE RIVER BASIN

023142741 NORTH FORK SUWANNEE RIVER AT SILL NEAR FARGO, GA

LOCATION.--Lat 30 ° 48'58", long 82 ° 24'49", in Okefenokee National Wildlife Refuge and Wilderness Area, Charlton County, Hydrologic Unit 03110201, at northern control structure on Okefenokee Swamp Sill, and 12.5 mi northeast of Fargo.

DRAINAGE AREA.--Indeterminate.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.--October 1998 to current year.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929.

REMARKS.--Records fair.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 36 21 18 43 57 29 362 14 .02 91 146 16 2 33 21 18 45 78 29 353 13 .02 117 167 17 3 31 21 18 46 93 29 345 11 .01 140 177 19 4 29 21 18 47 83 52 337 9.9 .00 134 173 20 5 28 20 18 48 77 69 326 8.7 .01 128 182 21

6 27 20 18 48 73 68 301 7.3 .00 133 215 32 7 27 20 18 47 70 65 276 6.3 .00 123 198 35 8 27 20 18 48 67 61 250 5.5 .00 112 178 40 9 26 20 18 47 63 58 232 4.7 .02 98 159 45 10 26 20 18 46 62 63 213 3.8 .32 85 138 48

11 26 19 18 45 60 63 193 2.8 .55 74 117 49 12 26 19 18 46 57 61 166 1.9 61 66 100 50 13 26 18 18 45 55 150 148 1.9 59 63 84 49 14 26 18 18 44 54 183 133 1.5 43 68 73 45 15 26 18 19 43 52 193 115 1.2 36 86 72 41

16 26 18 19 44 51 202 92 .84 32 115 68 38 17 26 17 19 43 49 206 39 .55 28 122 62 34 18 26 17 19 41 47 236 17 .38 34 111 56 31 19 26 16 19 64 45 263 21 .30 49 93 59 e28 20 25 16 19 77 43 322 28 .21 49 77 54 e26

21 24 16 20 70 42 352 24 .18 56 70 48 e24 22 24 16 20 64 40 367 21 .14 70 60 43 e21 23 24 16 20 59 54 377 18 .10 80 55 38 e23 24 23 16 20 57 58 385 15 .06 81 56 35 e24 25 22 16 19 54 43 389 15 .04 75 49 32 e27

26 21 17 19 52 37 395 14 .03 67 54 28 e26 27 21 17 20 49 34 392 12 .02 61 62 25 e24 28 21 18 22 47 31 386 11 .00 56 69 23 e23 29 21 18 30 44 --- 380 9.1 .00 53 78 21 e21 30 21 18 36 44 --- 377 13 .01 56 95 19 e19 31 21 --- 40 45 --- 370 --- .00 --- 121 17 ---

MEAN 25.5 18.3 20.4 49.7 56.2 212 137 3.11 34.9 90.5 90.5 30.5 MAX 36 21 40 77 93 395 362 14 81 140 215 50 MIN 21 16 18 41 31 29 9.1 .00 .00 49 17 16

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 109 31.7 21.7 36.2 59.1 95.5 62.9 11.6 15.5 47.5 48.9 28.7 MAX 274 52.3 22.8 49.7 99.4 212 137 17.6 34.9 90.5 90.5 30.5 (WY) 1999 1999 2000 2001 1999 2001 2001 2000 2001 2001 2001 2001 MIN 25.5 18.3 20.4 22.1 23.0 22.1 24.9 3.11 5.67 25.5 26.9 25.3 (WY) 2001 2001 2001 2000 2000 2000 2000 2001 1999 1999 1999 1999

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 22.2 64.2 47.5 HIGHEST ANNUAL MEAN 64.2 2001 LOWEST ANNUAL MEAN 23.2 2000 HIGHEST DAILY MEAN 40 Dec 31 395 Mar 26 395 Mar 26 2001 LOWEST DAILY MEAN .00 Jun 1 .00 May 28 .00 Jun 1 2000 ANNUAL SEVEN-DAY MINIMUM .07 May 29 .01 Jun 2 .01 Jun 2 2001 MAXIMUM PEAK FLOW 396 Mar 26 396 Mar 26 2001 MAXIMUM PEAK STAGE 111.33 Mar 26 111.33 Mar 26 2001 INSTANTANEOUS LOW FLOW .00 May 28 .00 May 30 2000 10 PERCENT EXCEEDS 31 166 96 50 PERCENT EXCEEDS 23 36 26 90 PERCENT EXCEEDS 16 6.9 10

e Estimated51 SUWANNEE RIVER BASIN

023142741 NORTH FORK SUWANNEE RIVER AT SILL NEAR FARGO, GA--Continued

WATER-QUALITY RECORDS

PERIOD OF RECORD.--February 1999 to current year.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001

BARO- PH PH RESIDUE NITRO

- METRIC SPE- WATER WATER TOTAL NITRO- NITRO- GEN,AM

- PRES- COLOR CIFIC WHOLE WHOLE AT 105 GEN, GEN, MONIA + TEMPER- SURE (PLAT- CON- OXYGEN, FIELD LAB DEG. C, AMMONIA NITRITE ORGANI C ATURE (MM GAGE INUM- DUCT- DIS- (STAND- (STAND- SUS- TOTAL TOTAL TOTAL DATE TIME WATER OF HEIGHT COBALT ANCE SOLVED ARD ARD PENDED (MG/L (MG/L (MG/L (DEG C) HG) (FEET) UNITS) (US/CM) (MG/L) UNITS) UNITS) (MG/L) AS N) AS N) AS N) (00010) (00025) (00065) (00080) (00095) (00300) (00400) (00403) (00530) (00610) (00615) (00625 )

FEB 01... 1057 12.8 765 111.81 160 89 9.1 3.7 3.8 4 .07 E.01 1.1 MAR 28... 1015 13.0 766 111.26 280 99 5.9 3.8 3.9 3 .04 <.01 1.4
MAY 02... 1330 22.1 770 107.68 280 98 7.9 3.8 3.8 22 .02 <.01 1.9 AUG 23... 1145 26.6 765 108.28 400 101 -- 3.6 3.8 11 .06 <.01 1.9

CARBON, NITRO- CARBON, ORGANIC MAGNE- POTAS- CHLO- FLUO- SILICA, GEN, PHOS- ORGANIC PARTIC- CALCIUM SIUM, SODIUM, SIUM, RIDE, SULFATE RIDE, DIS- ARSENI C NO2+NO3 PHORUS DIS- ULATE DIS- DIS- DIS- DIS- DIS- DIS- DIS- SOLVED DIS- TOTAL TOTAL SOLVED TOTAL SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED SOLVED (MG/L SOLVE D DATE (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L (MG/L AS (UG/L AS N) AS P) AS C) AS C) AS CA) AS MG) AS NA) AS K) AS CL) AS SO4) AS F) SIO2) AS AS ) (00630) (00665) (00681) (00689) (00915) (00925) (00930) (00935) (00940) (00945) (00950) (00955) (01000 )

FEB 01... <.02 <.020 45 .5 .61 .500 4.4 <.10 7.5 .7 <.1 11.0 <1.0
MAR 28... <.02 <.020 51 .4 1.10 .800 3.0 .10 7.1 1.6 <.1 7.4 <1.0 MAY 02... <.02 <.020 55 1.3 1.00 .800 5.1 .10 8.4 .3 <.1 6.4 <1.0 AUG 23... <.02 <.020 65 .4 .83 .690 5.0 <.10 7.7 <.2 <.1 7.2 <1.0

BERYL- CHRO- BERYL- LIUM, CADMIUM MIUM, COPPER, LEAD, NICKEL
, LIUM, TOTAL CADMIUM WATER TOTAL COPPER, TOTAL IRON, LEAD, TOTAL NICKEL, TOTAL ARSENIC DIS- RECOV- DIS- UNFLTRD RECOV- DIS- RECOV- DIS- DIS- RECOV- DIS- RECOV

- TOTAL SOLVED ERABLE SOLVED TOTAL ERABLE SOLVED ERABLE SOLVED SOLVED ERABLE SOLVED ERABL E DATE (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L (UG/L AS AS) AS BE) AS BE) AS CD) AS CD) AS CR) AS CU) AS CU) AS FE) AS PB) AS PB) AS NI) AS NI ) (01002) (01010) (01012) (01025) (01027) (01034) (01040) (01042) (01046) (01049) (01051) (01065) (01067 )

FEB 01... <1 <1.00 <1.00 <1.00 <1.00 2 3.3 3.0 320 <1.00 1 <1.00 <1 MAR 28... <1 <1.00 <1.00 <1.00 <1.00 <1 <1.0 <1.0 300 <1.00 <1 <1.00 <1
MAY 02... <1 <1.00 <1.00 <1.00 <1.00 <1 <1.0 <1.0 710 <1.00 <1 <1.00 <1 AUG 23... <1 <1.00 <1.00 <1.00 <1.00 1 <1.0 <1.0 1400 <1.00 <1 <1.00 1

SOLIDS, SPE- STRON- VANA- SELE- RESIDUE PHOS- MERCURY CIFIC TIUM, DIUM, ZINC, NIUM, SELE- AT 180 PHORUS MERCURY TOTAL CON- DIS- DIS- DIS- DIS- NIUM, TANNIN DEG. C ORTHO DIS- RECOV- DUCT- SOLVED SOLVED SOLVED SOLVED TOTAL AND DIS- TOTAL SOLVED ERABLE ANCE DATE (UG/L (UG/L (UG/L (UG/L (UG/L LIGNIN SOLVED (MG/L (UG/L (UG/L LAB AS SR) AS V) AS ZN) AS SE) AS SE) (MG/L) (MG/L) AS P) AS HG) AS HG) (US/CM) (01080) (01085) (01090) (01145) (01147) (32240) (70300) (70507) (71890) (71900) (90095)

FEB 01... 6.00 <1.0 8 <1.0 <1.0 8.3 92 E.020 <.10 <.10 91 MAR 28... 9.20 1.2 5 <1.0 <1.0 8.8 116 <.010 <.10 <.10 94 MAY 02... 11.0 <1.0 6 <1.0 <1.0 9.8 128 <.010 <.10 <.10 99 AUG 23... 9.50 <1.0 9 <1.0 <1.0 14 151 <.010 <.10 <.10 101

E Estimated < Actual value is known to be less than the value shown.52 SUWANNEE RIVER BASIN

303902082315200 CYPRESS CREEK NEAR EDITH, GA

LOCATION.--Lat 30 ° 39'02", long 82 ° 31'52", Clinch County, Hydrologic Unit 03110201, reference point at downstream side of bridge on State Highway 94, 2.2 mi east of Edith, 3.0 mi south of Fargo, and 3.2 mi upstream from mouth.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD.--December 1998 to current year, gage height and discharge measurements only.

GAGE.--Nonrecording gage. Elevation of gage is 117.00 ft above National Geodetic Vertical Datum of 1929,from topographic map.

EXTREMES FOR PERIOD OF RECORD.--Maximum measured discharge, 40.9 ft 3 /s, Apr. 4, 2001; maximum observed gage height, 109.07 ft, Mar. 26, 2001; minimum measured discharge, dry, May 24, 2001.

EXTREMES FOR CURRENT YEAR.-- Maximum measured discharge, 40.9 ft 3 /s, Apr. 4; maximum observed gage height, 109.07 ft, Mar. 26; minimum measured discharge, dry, May 24.

DISCHARGE MEASUREMENTS, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001

DATE TIME STREAM DISCHARGE STAGE IN FT3/S

Oct. 17 1555 107.38 11.3

Dec. 6 1505 107.12 3.45

Apr. 4 1310 107.80 40.9

May 8 1230 106.89 No flow.

May 24 1330 Dry53 SUWANNEE RIVER BASIN

02315000 SUWANNEE RIVER NEAR BENTON, FL

LOCATION.--Lat 30 ° 30'26", long 82 ° 42'59", in NE 1 ⁄ 4 sec. 9, T. 1 N., R. 16 E., Columbia County, Hydrologic Unit 03110201, near left bank on downstream side of bridge on State Highway 6, 3.7 mi northwest of Benton, 6.4 mi south of Florida-Georgia State Line, 13.7 mi east of Jasper, and 196 mi upstream from mouth.

DRAINAGE AREA.--2,090 mi 2 , approximately, includes part of watershed in Okefenokee Swamp which is indeterminate.

PERIOD OF RECORD.--October 1975 to current year. Miscellaneous discharge measurements for some periods July 1934 to September 1975. Records for December 1931 to June 1934, at site 2.0 mi upstream (at Turner Bridge) not equivalent owing to difference in drainage areas.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929. Oct. 1, 1975 to Oct. 14, 1986, nonrecording gage at same site and datum. Dec. 8, 1931 to June 30, 1934, nonrecording gage at site 2.0 mi upstream, datum unknown.

REMARKS.--Records good, except for estimated daily discharges, which are fair.

EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge measured, 27,700 ft 3 /s Apr. 6, 1973, gage height, 102.80 ft.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 658 102 53 81 127 102 1280 116 15 1100 e1000 208 2 659 96 52 86 141 96 1270 105 14 1160 e1100 203 3 644 92 52 91 153 92 1240 96 13 1330 e1080 188 4 619 87 50 96 172 109 1200 87 12 1550 e1050 190 5 601 85 49 101 187 126 1160 80 12 1570 e1100 209

6 605 81 48 103 187 142 1120 73 12 1540 e1350 238 7 636 77 47 106 185 148 1090 64 11 1490 e1700 260 8 669 74 46 109 182 146 1050 57 12 1390 e1650 278 9 638 69 48 109 174 141 1000 52 15 1350 e1550 274 10 595 66 53 111 170 142 934 47 21 1320 e1400 276

11 556 62 54 116 165 144 869 43 26 1220 e1250 274 12 514 58 52 122 160 144 809 38 118 1090 e1100 275 13 482 55 52 124 157 179 748 35 737 981 e950 292 14 449 58 51 125 154 388 690 32 1130 e1000 e850 298 15 418 56 53 126 152 498 637 30 1120 e1100 e800 279

16 388 52 54 126 150 517 606 28 1020 e1050 e750 262 17 360 49 60 125 149 538 568 26 891 e950 e700 245 18 334 48 55 125 146 559 562 24 819 e900 e660 225 19 310 48 54 124 141 671 491 23 866 e850 e630 207 20 288 47 51 126 135 825 404 21 1020 e800 e600 189

21 265 47 49 135 131 1040 352 20 1150 e750 e550 173 22 241 47 48 142 126 1140 309 19 1240 e700 e510 167 23 214 46 47 137 124 1160 273 18 1310 e650 e460 168 24 192 45 46 135 119 1180 243 16 1350 e620 414 189 25 175 54 46 133 121 1200 219 16 1370 e600 375 232

26 160 56 45 128 126 1210 195 15 1330 e630 336 247 27 146 56 45 123 116 1220 178 14 1260 e650 303 227 28 133 54 55 121 107 1220 162 14 1190 e680 273 202 29 123 55 62 120 --- 1230 144 14 1120 e670 248 183 30 115 55 72 120 --- 1250 129 14 1090 e700 223 166 31 108 --- 74 121 --- 1280 --- 14 --- e800 206 ---

MEAN 397 62.6 52.4 118 148 608 664 40.4 676 1006 812 227 MAX 669 102 74 142 187 1280 1280 116 1370 1570 1700 298 MIN 108 45 45 81 107 92 129 14 11 600 206 166 IN. .22 .03 .03 .06 .07 .34 .35 .02 .36 .56 .45 .12

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1976 - 2001, BY WATER YEAR (WY)

MEAN 789 511 1082 1686 3121 3595 2264 722 555 661 968 691 MAX 3877 2824 9472 6679 10200 10750 12760 2979 3194 2966 5545 2738 (WY) 1995 1998 1977 1977 1998 1984 1984 1983 1976 1991 1991 1985 MIN 9.77 8.18 9.76 17.9 128 116 141 40.4 16.2 22.5 14.0 13.3 (WY) 1979 1979 1979 1979 1989 2000 1999 2001 2000 1990 1990 1990

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1976 - 2001

ANNUAL MEAN 131 403 1378 HIGHEST ANNUAL MEAN 3297 1984 LOWEST ANNUAL MEAN 111 2000 HIGHEST DAILY MEAN 669 Oct 8 e1700 Aug 7 18200 Apr 6 1984 LOWEST DAILY MEAN 6.1 Jun 17 11 Jun 7 1.3 Oct 9 1990 ANNUAL SEVEN-DAY MINIMUM 6.6 Jun 14 12 Jun 2 3.3 Oct 3 1990 MAXIMUM PEAK FLOW e1700 Aug 7 18300 Apr 6 1984 MAXIMUM PEAK STAGE 99.90 Apr 6 1984 INSTANTANEOUS LOW FLOW 11 Jun 7 1.3 Oct 9 1990 ANNUAL RUNOFF (INCHES) .85 2.62 8.96 10 PERCENT EXCEEDS 222 1160 3710 50 PERCENT EXCEEDS 104 173 512 90 PERCENT EXCEEDS 41 46 43

e Estimated54 SUWANNEE RIVER BASIN

02315000 SUWANNEE RIVER NEAR BENTON, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 77.43 74.99 74.68 74.85 75.14 74.96 79.90 75.07 74.14 79.20 --- 75.58 2 77.43 74.96 74.67 74.89 75.24 74.92 79.84 74.99 74.13 79.43 --- 75.56 3 77.38 74.93 74.67 74.92 75.30 74.89 79.73 74.92 74.10 80.06 --- 75.49 4 77.30 74.90 74.65 74.96 75.40 75.02 79.59 74.85 74.08 80.86 --- 75.50 5 77.23 74.88 74.65 74.99 75.48 75.14 79.44 74.79 74.08 80.93 --- 75.59

6 77.25 74.85 74.64 75.01 75.48 75.24 79.29 74.73 74.08 80.81 --- 75.73 7 77.35 74.83 74.63 75.02 75.47 75.28 79.16 74.68 74.07 80.64 --- 75.84 8 77.46 74.80 74.63 75.04 75.46 75.26 79.03 74.63 74.07 80.27 --- 75.93 9 77.36 74.78 74.64 75.04 75.41 75.24 78.82 74.58 74.14 80.15 --- 75.91 10 77.21 74.76 74.68 75.06 75.39 75.24 78.56 74.54 74.25 80.01 --- 75.91

11 77.07 74.73 74.68 75.09 75.36 75.25 78.29 74.50 74.33 79.66 --- 75.91 12 76.92 74.71 74.67 75.12 75.34 75.25 78.05 74.47 75.03 79.18 --- 75.91 13 76.80 74.69 74.66 75.14 75.32 75.43 77.79 74.43 77.78 78.74 --- 75.99 14 76.67 74.71 74.66 75.15 75.31 76.41 77.55 74.40 79.32 --- --- 76.02 15 76.55 74.69 74.67 75.15 75.30 76.86 77.36 74.37 79.29 --- --- 75.93

16 76.42 74.67 74.68 75.15 75.29 76.93 77.25 74.35 78.88 --- --- 75.85 17 76.31 74.65 74.72 75.14 75.28 77.01 77.12 74.33 78.39 --- --- 75.76 18 76.19 74.64 74.69 75.14 75.27 77.08 77.10 74.30 78.09 --- --- 75.66 19 76.08 74.64 74.68 75.13 75.23 77.48 76.83 74.28 78.28 --- --- 75.57 20 75.97 74.64 74.66 75.15 75.20 78.11 76.49 74.26 78.90 --- --- 75.49

21 75.86 74.64 74.65 75.20 75.17 78.96 76.27 74.24 79.41 --- --- 75.41 22 75.74 74.63 74.64 75.24 75.14 79.35 76.07 74.22 79.72 --- --- 75.38 23 75.61 74.62 74.64 75.21 75.12 79.44 75.90 74.20 79.98 --- --- 75.38 24 75.50 74.62 74.63 75.20 75.09 79.51 75.75 74.18 80.15 --- 76.53 75.49 25 75.42 74.68 74.62 75.18 75.10 79.57 75.63 74.17 80.20 --- 76.37 75.69

26 75.34 74.70 74.61 75.15 75.14 79.62 75.52 74.15 80.07 --- 76.20 75.77 27 75.26 74.70 74.61 75.12 75.07 79.66 75.44 74.13 79.81 --- 76.04 75.67 28 75.19 74.68 74.69 75.10 75.00 79.66 75.35 74.12 79.53 --- 75.90 75.55 29 75.13 74.69 74.73 75.10 --- 79.69 75.25 74.12 79.30 --- 75.78 75.46 30 75.08 74.69 74.79 75.09 --- 79.78 75.16 74.12 79.19 --- 75.65 75.37 31 75.03 --- 74.81 75.10 --- 79.87 --- 74.13 --- --- 75.57 ---

TOTAL 2367.54 2242.10 2314.73 2327.83 2107.50 2392.11 2323.53 2307.25 2316.79 --- --- 2270.30 MEAN 76.37 74.74 74.67 75.09 75.27 77.16 77.45 74.43 77.23 --- --- 75.68 MAX 77.46 74.99 74.81 75.24 75.48 79.87 79.90 75.07 80.20 --- --- 76.02 MIN 75.03 74.62 74.61 74.85 75.00 74.89 75.16 74.12 74.07 --- --- 75.37

CAL YR 2000 TOTAL 27483.99 MEAN 75.09 MAX 77.46 MIN 74.0155 SUWANNEE RIVER BASIN

02315500 SUWANNEE RIVER AT WHITE SPRINGS, FL

LOCATION.--Lat 30 ° 19'32", long 82 ° 44'18", in SW 1 ⁄ 4 sec. 8, T. 2 S., R. 16 E., Columbia County, Hydrologic Unit 03110201, on downstream side of bridge on U.S. Highway 41, 1.0 mi southeast of White Springs, and 171 mi upstream from mouth.

DRAINAGE AREA.--2,430 mi 2 , approximately, includes part of watershed in Okefenokee Swamp which is indeterminate.

PERIOD OF RECORD.--May 1906 to December 1908, February 1927 to current year.

REVISED RECORDS.--WSP 1504: 1906, 1908. WSP 1905: WDR FL-75-1: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929. Prior to July 31, 1932, nonrecording gage at site 1.0 mi downstream at datum 48.54 ft. August 1, 1932 to October 10, 1979, water-stage recorder, at present site, at datum 48.54 ft. October 11, 1979 to December 1, 1983, non-recording gage at site 2.2 miles downstream at NGVD. December 2

, 1983 to June 30, 1996, nonrecording gage, at present site and datum.

REMARKS.--No estimated daily discharges. Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 677 111 68 87 127 112 1290 129 14 1090 1050 216 2 673 107 66 95 132 104 1270 118 16 1110 1160 238 3 660 103 66 99 145 99 1250 108 15 1220 1130 244 4 640 100 65 102 159 125 1220 99 14 1400 1120 252 5 615 96 62 105 176 131 1180 91 14 1520 1130 319

6 608 93 62 109 183 134 1140 84 13 1480 1380 440 7 617 90 62 113 181 140 1110 76 13 1460 1740 542 8 641 88 63 118 180 143 1080 67 14 1370 1710 575 9 634 85 64 119 175 141 1040 58 12 1310 1600 504 10 600 83 67 118 170 141 985 52 16 1290 1460 454

11 567 77 67 121 166 139 928 46 24 1230 1310 419 12 540 72 68 128 160 140 875 42 91 1130 1160 395 13 512 69 66 128 156 243 825 38 379 1030 1040 384 14 481 70 65 129 153 316 775 35 1030 1040 934 405 15 450 70 67 130 151 578 733 32 1140 1170 864 390

16 421 65 66 130 150 691 705 30 1080 1080 830 362 17 392 63 79 129 150 683 676 28 977 998 801 335 18 365 60 72 127 145 703 658 26 891 960 765 303 19 339 59 66 127 141 748 627 24 877 918 743 273 20 314 60 64 137 137 901 507 22 966 867 741 247

21 288 56 61 131 133 1060 416 21 1100 815 712 223 22 261 55 61 139 129 1190 357 20 1180 757 670 212 23 234 53 59 142 126 1210 308 19 1250 717 602 258 24 209 54 59 139 122 1220 268 17 1290 682 516 297 25 190 68 58 137 118 1230 241 16 1310 676 447 347

26 174 71 57 132 125 1240 213 15 1300 701 390 378 27 158 69 56 128 124 1240 189 15 1250 727 343 349 28 144 67 65 125 115 1240 173 14 1190 729 308 303 29 133 66 81 123 --- 1240 157 15 1130 724 270 263 30 123 67 80 123 --- 1270 142 17 1100 731 244 228 31 116 --- 84 124 --- 1290 --- 15 --- 864 224 ---

MEAN 412 74.9 66.0 122 147 640 711 44.8 657 1026 884 338 MAX 677 111 84 142 183 1290 1290 129 1310 1520 1740 575 MIN 116 53 56 87 115 99 142 14 12 676 224 212 IN. .20 .03 .03 .06 .06 .30 .33 .02 .30 .49 .42 .16

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1906 - 2001, BY WATER YEAR (WY)

MEAN 1727 862 1042 1810 2750 3299 3046 1109 838 1236 1922 1863 MAX 13100 16450 9103 8401 12950 14200 23910 8288 6317 5274 10870 13310 (WY) 1929 1948 1977 1942 1998 1998 1973 1964 1973 1906 1945 1964 MIN 8.55 6.63 8.68 11.8 13.2 35.5 22.2 10.5 11.8 19.6 15.8 8.82 (WY) 1932 1932 1932 1932 1932 1932 1932 1932 1935 1955 1990 1990

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1906 - 2001

ANNUAL MEAN 161 429 1793 HIGHEST ANNUAL MEAN 6806 1948 LOWEST ANNUAL MEAN 144 2000 HIGHEST DAILY MEAN 1000 Aug 5 1740 Aug 7 38000 Apr 10 1973 LOWEST DAILY MEAN 8.2 Jun 12 12 Jun 9 2.8 Sep 26 1990 ANNUAL SEVEN-DAY MINIMUM 8.9 Jun 7 14 Jun 3 3.4 Sep 26 1990 MAXIMUM PEAK FLOW 1770 Aug 7 38100 Apr 10 1973 MAXIMUM PEAK STAGE 57.28 Aug 7 88.56 Apr 10 1973 INSTANTANEOUS LOW FLOW 11 Jun 7 2.8 Sep 26 1990 ANNUAL RUNOFF (INCHES) .90 2.40 10.02 10 PERCENT EXCEEDS 427 1180 4930 50 PERCENT EXCEEDS 116 181 694 90 PERCENT EXCEEDS 40 56 6156 SUWANNEE RIVER BASIN

02315500 SUWANNEE RIVER AT WHITE SPRINGS, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 53.59 50.83 50.42 50.58 50.95 50.82 55.74 50.96 49.78 54.98 54.82 51.57 2 53.58 50.78 50.41 50.65 50.98 50.74 55.68 50.86 49.81 55.05 55.24 51.68 3 53.52 50.74 50.41 50.70 51.08 50.70 55.59 50.78 49.81 55.46 55.14 51.70 4 53.44 50.70 50.40 50.73 51.18 50.92 55.47 50.69 49.77 56.14 55.10 51.73 5 53.34 50.67 50.39 50.75 51.29 50.97 55.33 50.62 49.76 56.50 55.12 52.01

6 53.31 50.64 50.38 50.79 51.33 51.00 55.18 50.55 49.75 56.40 56.02 52.44 7 53.35 50.61 50.38 50.82 51.32 51.05 55.05 50.47 49.73 56.32 57.19 52.73 8 53.45 50.58 50.39 50.86 51.31 51.06 54.93 50.42 49.77 56.04 57.12 52.81 9 53.42 50.56 50.40 50.88 51.28 51.05 54.76 50.35 49.72 55.82 56.76 52.62 10 53.28 50.53 50.42 50.87 51.25 51.05 54.54 50.30 49.83 55.75 56.33 52.47

11 53.15 50.48 50.42 50.89 51.22 51.03 54.30 50.25 49.98 55.52 55.82 52.36 12 53.03 50.45 50.42 50.95 51.18 51.04 54.06 50.21 50.62 55.15 55.27 52.28 13 52.92 50.43 50.41 50.95 51.15 51.64 53.84 50.17 52.09 54.73 54.79 52.24 14 52.79 50.44 50.40 50.96 51.14 51.97 53.61 50.13 54.71 54.75 54.35 52.31 15 52.66 50.44 50.42 50.97 51.12 52.83 53.41 50.10 55.16 55.28 54.04 52.26

16 52.53 50.40 50.41 50.97 51.11 53.21 53.27 50.06 54.94 54.93 53.90 52.16 17 52.40 50.39 50.50 50.96 51.11 53.17 53.13 50.04 54.51 54.59 53.77 52.06 18 52.27 50.37 50.45 50.95 51.08 53.26 53.04 50.01 54.13 54.43 53.60 51.93 19 52.15 50.36 50.41 50.94 51.05 53.48 52.95 49.97 54.07 54.25 53.50 51.80 20 52.03 50.37 50.40 51.02 51.02 54.18 52.63 49.95 54.46 54.03 53.49 51.68

21 51.91 50.34 50.37 50.97 50.99 54.85 52.35 49.93 55.00 53.79 53.35 51.55 22 51.78 50.33 50.38 51.03 50.96 55.35 52.14 49.91 55.33 53.52 53.15 51.50 23 51.63 50.32 50.36 51.06 50.93 55.45 51.95 49.89 55.58 53.33 52.93 51.73 24 51.49 50.32 50.36 51.03 50.90 55.48 51.78 49.85 55.74 53.16 52.70 51.90 25 51.37 50.42 50.35 51.02 50.87 55.50 51.65 49.82 55.83 53.13 52.50 52.10

26 51.27 50.45 50.34 50.98 50.93 55.54 51.50 49.81 55.77 53.25 52.31 52.22 27 51.18 50.43 50.34 50.95 50.92 55.56 51.37 49.80 55.60 53.38 52.14 52.11 28 51.08 50.42 50.40 50.93 50.84 55.55 51.27 49.77 55.36 53.39 52.00 51.93 29 51.01 50.41 50.51 50.91 --- 55.57 51.16 49.80 55.14 53.37 51.84 51.75 30 50.94 50.42 50.50 50.91 --- 55.67 51.06 49.85 55.00 53.40 51.71 51.58 31 50.88 --- 50.55 50.92 --- 55.72 --- 49.80 --- 54.01 51.61 ---

TOTAL 1624.75 1514.63 1562.70 1577.90 1430.49 1645.41 1602.74 1555.12 1586.75 1693.85 1677.61 1561.21 MEAN 52.41 50.49 50.41 50.90 51.09 53.08 53.42 50.17 52.89 54.64 54.12 52.04 MAX 53.59 50.83 50.55 51.06 51.33 55.72 55.74 50.96 55.83 56.50 57.19 52.81 MIN 50.88 50.32 50.34 50.58 50.84 50.70 51.06 49.77 49.72 53.13 51.61 51.50

CAL YR 2000 TOTAL 18705.76 MEAN 51.11 MAX 54.79 MIN 49.87 WTR YR 2001 TOTAL 19033.16 MEAN 52.15 MAX 57.19 MIN 49.7257 SUWANNEE RIVER BASIN

02317620 ALAPAHA RIVER NEAR JENNINGS, FL

Location.--Lat 30 ° 35'53", long 83 ° 04'24", in SW 1 ⁄ 4 sec.1, T.2 N., R.12 E., Hamilton County, Hydrologic Unit 03110202, near left bank on downstream side of bridge on State Highway 150, 150 ft upstream from Southern Railroad bridge, 1,400 ft downstream from Apalahoochee River, 1.5 mi south of Florida-Georgia State line, 1.6 mi southeast of Jennings, and 20.1 mi upstream from mouth.

Drainage Area.--1,680 mi 2 , approximately.

PERIOD OF RECORD.--July 1976 to September 1984, October 1984 to September 1985 (gage height and peak discharge only), October 1985 to September 1987, September 1998 to current year. Prior to July 28, 1975 (one miscellaneous discharge measurement in 1923, three in 1928, and six made by Suwannee River Water Management District in 1976).

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (Florida Department of Transportation bench mark). Prior to August 18, 1928, nonrecording gage at site 150 ft downstream at datum unknown. July 1976 to September 1987, at datum 58.22 ft lower.

REMARKS.--No estimated daily discharges. Records good.

COOPERATION.--Records from October 1999 to September 2001 were collected and computed by Suwannee River Water Management District and reviewed by U. S. Geological Survey.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 18,8000 ft 3 /s Feb. 17, 1986, gage height, 32.10 ft, minimum, 31 ft 3 /s July 22, 1986.

EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum measured discharge, 17,900 ft 3 /s May 2, 1928, gage height not determined.

EXTREMES FOR CURRENT YEAR.--Maximum discharge 5,680 ft 3 /s, Mar. 31, gage height 79.52 ft; minimum, 85 ft 3 /s, May. 29, June 9.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 1590 180 475 878 1410 430 5570 515 100 611 1130 303 2 1480 180 455 920 1410 423 5350 460 104 653 1050 353 3 1420 182 430 990 1350 415 5030 418 100 1420 892 355 4 1340 172 400 1080 1260 587 4660 378 96 1460 767 363 5 1200 162 375 1160 1190 794 4260 343 94 1260 707 343

6 1050 156 358 1220 1120 761 3990 313 96 2450 1100 363 7 1290 150 340 1230 1050 773 3860 290 88 2110 1890 363 8 1270 144 325 1220 997 888 3820 268 90 2240 2930 343 9 1150 142 313 1180 958 1040 3770 250 88 1660 2080 310 10 944 140 303 1100 916 1230 3660 230 114 1570 1360 293

11 806 136 295 1020 881 1370 3510 215 168 1430 1380 285 12 734 132 285 1010 848 1490 3360 200 3480 1240 916 283 13 671 130 278 1010 821 2600 3210 190 4190 1420 851 310 14 602 136 283 972 809 2670 3050 184 4890 1300 734 338 15 539 176 318 916 800 2960 2870 174 4280 1140 725 358

16 483 200 350 871 779 3270 2700 164 3330 1040 683 335 17 443 192 383 842 758 3220 2510 152 2720 969 614 290 18 405 166 408 809 725 3370 2330 144 2200 906 521 255 19 380 158 433 779 686 3690 2150 136 2200 821 536 228 20 363 172 465 785 647 4060 1950 126 2030 716 521 205

21 343 182 475 755 617 4460 1690 122 1730 647 498 192 22 313 182 463 725 581 4810 1460 112 1460 584 443 188 23 290 176 440 698 548 5050 1270 110 1300 542 375 413 24 268 174 425 692 521 5130 1100 108 1200 821 323 335 25 253 260 420 701 500 5220 986 106 1080 1120 293 368

26 238 405 420 728 475 5340 909 98 899 1100 263 348 27 225 483 420 782 455 5440 824 92 734 1030 243 293 28 210 488 448 874 438 5510 740 90 644 1010 220 253 29 200 480 644 986 --- 5570 662 86 578 842 200 223 30 198 480 794 1100 --- 5650 584 91 536 803 190 200 31 188 --- 885 1210 --- 5660 --- 106 --- 851 203 ---

TOTAL 20886 6516 13106 29243 23550 93881 81835 6271 40619 35766 24638 9089 MEAN 674 217 423 943 841 3028 2728 202 1354 1154 795 303 MAX 1590 488 885 1230 1410 5660 5570 515 4890 2450 2930 413 MIN 188 130 278 692 438 415 584 86 88 542 190 188 AC-FT 41430 12920 26000 58000 46710 186200 162300 12440 80570 70940 48870 18030 CFSM .40 .13 .25 .56 .50 1.80 1.62 .12 .81 .69 .47 .18 IN. .46 .14 .29 .65 .52 2.08 1.81 .14 .90 .79 .55 .20

CAL YR 2000 TOTAL 209388 MEAN 572 MAX 3850 MIN 48 AC-FT 415300 CFSM .34 IN. 4.64 WTR YR 2001 TOTAL 385400 MEAN 1056 MAX 5660 MIN 86 AC-FT 764400 CFSM .63 IN. 8.5358 SUWANNEE RIVER BASIN

02317620 ALAPAHA RIVER NEAR JENNINGS, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 66.84 62.30 63.50 64.85 66.38 63.32 79.19 63.65 61.90 63.97 65.56 62.81 2 66.58 62.30 63.42 64.97 66.37 63.29 78.56 63.44 61.92 64.11 65.35 63.01 3 66.39 62.31 63.32 65.17 66.20 63.26 77.65 63.27 61.90 66.41 64.89 63.02 4 66.17 62.26 63.20 65.43 65.95 63.89 76.45 63.11 61.87 66.52 64.49 63.05 5 65.77 62.21 63.10 65.65 65.75 64.58 75.11 62.97 61.86 65.93 64.29 62.97

6 65.34 62.18 63.03 65.82 65.53 64.47 74.05 62.85 61.87 69.19 65.52 63.05 7 66.02 62.15 62.96 65.87 65.34 64.51 73.56 62.76 61.82 68.24 67.59 63.05 8 65.98 62.12 62.90 65.83 65.19 64.88 73.43 62.67 61.83 68.60 70.57 62.97 9 65.63 62.11 62.85 65.70 65.08 65.30 73.27 62.60 61.82 67.03 68.15 62.84 10 65.04 62.10 62.81 65.48 64.96 65.85 72.95 62.52 61.97 66.81 66.22 62.77

11 64.62 62.08 62.78 65.27 64.86 66.26 72.51 62.46 62.24 66.42 65.30 62.74 12 64.38 62.06 62.74 65.23 64.76 66.60 72.00 62.40 72.40 65.88 64.96 62.73 13 64.17 62.05 62.71 65.22 64.67 69.63 71.50 62.35 74.86 66.39 64.77 62.84 14 63.94 62.08 62.73 65.12 64.63 69.83 70.98 62.32 77.22 66.06 64.38 62.95 15 63.73 62.28 62.87 64.96 64.60 70.68 70.41 62.27 75.19 65.61 64.35 63.03

16 63.53 62.40 63.00 64.83 64.53 71.70 69.90 62.22 71.90 65.32 64.21 62.94 17 63.37 62.36 63.13 64.74 64.46 71.53 69.36 62.16 69.67 65.11 63.98 62.76 18 63.22 62.23 63.23 64.63 64.35 72.03 68.87 62.12 68.50 64.93 63.67 62.62 19 63.12 62.19 63.33 64.53 64.22 73.00 68.34 62.08 68.49 64.67 63.72 62.51 20 63.05 62.26 63.46 64.55 64.09 74.35 67.76 62.03 67.99 64.32 63.67 62.42

21 62.97 62.31 63.50 64.45 63.99 75.79 67.11 62.01 67.21 64.09 63.59 62.36 22 62.85 62.31 63.45 64.35 63.87 76.94 66.51 61.96 66.51 63.88 63.37 62.34 23 62.76 62.28 63.36 64.26 63.76 77.71 65.96 61.95 66.05 63.74 63.10 63.25 24 62.67 62.27 63.30 64.24 63.67 77.93 65.48 61.94 65.76 64.67 62.89 62.94 25 62.61 62.64 63.28 64.27 63.60 78.19 65.16 61.93 65.42 65.53 62.77 63.07

26 62.55 63.22 63.28 64.36 63.51 78.53 64.94 61.89 64.91 65.48 62.65 62.99 27 62.50 63.53 63.28 64.54 63.42 78.82 64.68 61.85 64.38 65.28 62.57 62.78 28 62.44 63.55 63.39 64.84 63.35 79.02 64.40 61.83 64.08 65.23 62.48 62.61 29 62.40 63.52 64.08 65.16 --- 79.21 64.14 61.81 63.86 64.74 62.40 62.49 30 62.39 63.52 64.58 65.49 --- 79.44 63.88 61.84 63.72 64.61 62.35 62.40 31 62.34 --- 64.87 65.80 --- 79.46 --- 61.93 --- 64.77 62.41 ---

TOTAL 1985.37 1873.18 1961.44 2015.61 1811.09 2210.00 2108.11 1933.19 1979.12 2033.54 1996.22 1884.31 MEAN 64.04 62.44 63.27 65.02 64.68 71.29 70.27 62.36 65.97 65.60 64.39 62.81 MAX 66.84 63.55 64.87 65.87 66.38 79.46 79.19 63.65 77.22 69.19 70.57 63.25 MIN 62.34 62.05 62.71 64.24 63.35 63.26 63.88 61.81 61.82 63.74 62.35 62.34

CAL YR 2000 TOTAL 23244.35 MEAN 63.51 MAX 73.54 MIN 61.44 WTR YR 2001 TOTAL 23791.18 MEAN 65.18 MAX 79.46 MIN 61.8159 SUWANNEE RIVER BASIN

02319000 WITHLACOOCHEE RIVER NEAR PINETTA, FL

LOCATION.--Lat 30 ° 35'43", long 83 ° 15'35", in NW 1 ⁄ 4 sec. 7, T. 2 N., R. 11 E., Madison County, Hydrologic Unit 03110203, on right bank 300 ft downstream from County Road 150 bridge, 0.1 mi downstream from small tributary, 0.3 mi west of Bellville, 5.6 mi east of Pinetta, and 22 mi upstream from mouth.

DRAINAGE AREA.--2,120 mi 2 , approximately.

PERIOD OF RECORD.--October 1931 to current year. Monthly discharge only for October and November 1931, published in WSP 1304.

REVISED RECORDS.--WSP 972: 1941-42. WSP 1905: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 47.21 ft above National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Oct. 11, 1931 to Dec. 3, 1941, nonrecording gage at same site and datum. Dec. 3, 1941 to Aug. 2, 1972, water-stage recorder at same site and datum. Aug. 2, 1972 to Apr. 22, 1986, nonrecording gage at same site and datum.

REMARKS.--No estimated daily discharges. Records good.

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood in August 1928 reached a stage of 36.75 ft from floodmarks, discharge, 53,600 ft 3 /s.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 2660 174 673 1530 1350 538 5600 526 140 695 862 194 2 2420 168 623 1690 1300 525 5230 465 139 661 813 214 3 1990 159 583 1820 1240 521 5210 418 140 697 751 241 4 1550 153 554 2000 1190 582 5450 413 140 779 680 239 5 1230 152 529 2130 1160 701 5810 398 137 981 626 285

6 1040 147 495 2200 1150 804 6140 381 138 1330 721 359 7 1040 142 450 2120 1150 937 6220 355 136 1780 999 349 8 1040 139 413 1890 1140 1160 5840 324 139 1880 1020 326 9 991 139 389 1600 1100 1490 5060 312 151 1600 874 307 10 910 135 361 1410 1050 1940 4260 299 173 1280 783 283

11 814 131 340 1310 992 2420 3750 289 188 1080 780 283 12 744 129 330 1290 928 2840 3460 273 1530 1030 822 254 13 691 129 325 1280 877 3330 3140 248 4460 957 861 316 14 656 132 337 1260 832 3550 2690 237 6490 850 811 389 15 621 141 366 1240 802 3600 2200 233 6940 803 746 378

16 574 200 417 1200 792 3570 1840 228 5690 745 690 298 17 512 172 487 1160 796 3750 1600 211 3860 671 713 239 18 461 158 602 1120 801 4080 1440 195 3050 630 754 197 19 417 173 663 1080 807 4740 1350 183 2730 631 741 172 20 377 190 668 1050 788 6080 1300 177 2500 595 688 155

21 342 200 669 1010 753 7360 1260 168 2230 508 633 139 22 312 199 672 989 718 8510 1210 163 1890 424 581 135 23 284 194 665 1010 687 9510 1140 166 1590 369 550 143 24 260 198 669 1060 652 10000 1050 152 1370 359 498 136 25 245 235 670 1160 628 10000 955 145 1320 437 428 135

26 232 425 642 1300 601 9720 874 140 1340 600 359 131 27 221 631 599 1460 576 9100 789 137 1330 614 310 132 28 208 744 585 1610 555 8420 712 139 1210 642 272 130 29 199 766 737 1680 --- 7750 639 142 1020 704 244 132 30 189 729 1070 1640 --- 7000 579 140 830 751 221 124 31 180 --- 1330 1490 --- 6200 --- 142 --- 802 217 ---

MEAN 755 246 578 1445 908 4540 2893 252 1767 835 647 227 MAX 2660 766 1330 2200 1350 10000 6220 526 6940 1880 1020 389 MIN 180 129 325 989 555 521 579 137 136 359 217 124 IN. .41 .13 .31 .79 .45 2.47 1.52 .14 .93 .45 .35 .12

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1932 - 2001, BY WATER YEAR (WY)

MEAN 728 584 1241 2148 3529 4107 3217 1325 983 1013 1134 793 MAX 8178 9450 11280 8134 14720 12530 17320 8154 6043 6003 6759 6625 (WY) 1995 1948 1965 1993 1986 1998 1948 1964 1973 1991 1991 1935 MIN 85.7 78.1 92.4 116 133 238 253 199 131 88.3 89.7 96.5 (WY) 1955 1955 1955 1934 1934 1955 1968 1999 2000 1955 1955 1954

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1932 - 2001

ANNUAL MEAN 593 1260 1724 HIGHEST ANNUAL MEAN 5364 1948 LOWEST ANNUAL MEAN 236 1955 HIGHEST DAILY MEAN 5430 Sep 13 10000 Mar 24 73600 Apr 5 1948 LOWEST DAILY MEAN 91 Jul 11 124 Sep 30 73 Aug 21 1955 ANNUAL SEVEN-DAY MINIMUM 102 Aug 29 131 Sep 24 77 Aug 17 1955 MAXIMUM PEAK FLOW 10100 Mar 24 79400 Apr 5 1948 MAXIMUM PEAK STAGE 20.76 Mar 24 38.64 Apr 5 1948 INSTANTANEOUS LOW FLOW 122 Sep 30 70 Aug 23 1955 ANNUAL RUNOFF (INCHES) 3.81 8.07 11.05 10 PERCENT EXCEEDS 1710 3220 4600 50 PERCENT EXCEEDS 290 687 616 90 PERCENT EXCEEDS 116 152 14860 SUWANNEE RIVER BASIN

02319394 WITHLACOOCHEE RIVER NEAR LEE, FL

LOCATION.--Lat 30 ° 24'37", long 83 ° 10'49", in SW 1 ⁄ 4 sec.12, T. 1 S., R. 11 E., Madison County, Hydrologic Unit 03110203, near right bank on downstream side of bridge on County Road 141 and Myrrh Road, 2.3 mi upstream from mouth, and 7.3 mi east of
Lee.

DRAINAGE AREA.--2,330 mi 2

.
PERIOD OF RECORD.--November 2000 to September 2001.

GAGE.--Water-stage and water-current meter recorders. Datum of gage is undetermined.

REMARKS.--Records good. Flow affected by backwater from the Suwannee River.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 --- e682 925 1500 1660 1150 4590 1230 593 1220 1100 631 2 --- e658 887 1630 1620 1130 4330 1180 569 1140 1070 612 3 --- e638 861 1760 1590 1130 4240 1140 577 1150 1040 640 4 --- e620 829 1900 1560 1180 4220 1110 573 1130 998 639 5 --- e601 810 2030 1530 1240 4250 1060 559 1220 972 645

6 --- e595 803 2120 1530 1330 4370 1020 568 1370 944 695 7 --- e590 762 2140 1500 1430 4500 987 546 1680 1140 696 8 --- 581 723 2090 1510 1610 4490 962 544 1860 1200 679 9 --- 585 707 1930 1520 1880 4290 935 557 1790 1120 673 10 --- 582 685 1760 1480 2190 4100 881 581 1620 1070 668

11 --- 565 661 1680 1430 2600 3870 858 553 1450 1050 653 12 --- 564 648 1620 1390 3080 3680 816 949 1370 1060 649 13 --- 578 611 1580 1360 3470 3530 778 2820 1330 1080 680 14 --- 531 625 1590 1340 3660 3350 765 3860 1240 1090 714 15 --- 563 630 1560 1320 3710 3070 762 4110 1190 1030 734

16 --- 565 625 1540 1320 3730 2820 740 3900 1130 984 708 17 --- 551 677 1470 1320 3740 2550 726 3430 1080 974 648 18 --- 560 754 1460 1320 3900 2360 706 3070 1020 995 626 19 --- 543 850 1410 1350 4120 2200 691 2820 1030 1020 603 20 --- 534 868 1380 1340 4690 2090 696 2690 1000 970 590

21 --- 526 875 1320 1310 5260 2020 668 2590 964 945 579 22 --- 529 879 1280 1270 5810 1940 645 2380 909 897 564 23 --- 524 875 1290 1230 6160 1840 636 2120 842 870 546 24 --- 519 889 1320 1230 6470 1760 639 1910 842 828 569 25 --- 558 871 1360 1210 6330 1680 618 1790 832 792 510

26 --- 581 873 1470 1210 6000 1580 612 1770 888 761 495 27 --- 732 849 1580 1180 5770 1510 602 1720 956 710 495 28 --- 884 856 1720 1150 5420 1420 584 1630 938 673 487 29 --- 940 852 1820 --- 5240 1350 592 1510 964 659 501 30 --- 952 1090 1850 --- 4920 1280 587 1350 998 643 512 31 --- --- 1310 1760 --- 4740 --- 571 --- 1030 630 ---

MEAN --- 614 812 1643 1385 3648 2976 800 1755 1167 946 615 MAX --- 952 1310 2140 1660 6470 4590 1230 4110 1860 1200 734 MIN --- 519 611 1280 1150 1130 1280 571 544 832 630 487

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 2001 - 2001, BY WATER YEAR (WY)

MEAN --- 614 812 1643 1385 3648 2976 800 1755 1167 946 615 MAX --- 614 812 1643 1385 3648 2976 800 1755 1167 946 615 (WY) --- 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 MIN --- 614 812 1643 1385 3648 2976 800 1755 1167 946 615 (WY) --- 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001

SUMMARY STATISTICS FOR 2001 WATER YEAR

ANNUAL MEAN 1488 HIGHEST DAILY MEAN 6470 Mar 24 LOWEST DAILY MEAN 487 Sep 28 ANNUAL SEVEN-DAY MINIMUM 510 Sep 24 MAXIMUM PEAK FLOW 6920 Mar 24 MAXIMUM PEAK STAGE 41.83 Mar 26 INSTANTANEOUS LOW FLOW 319 Nov 21 10 PERCENT EXCEEDS 3600 50 PERCENT EXCEEDS 1080 90 PERCENT EXCEEDS 578

e Estimated61
SUWANNEE RIVER BASIN

02319500 SUWANNEE RIVER AT ELLAVILLE, FL

LOCATION.--Lat 30 ° 23'04", long 83 ° 10'19", in NE 1 ⁄ 4 sec. 24, T. 1 S., R. 11 E., Suwannee County, Hydrologic Unit 03110205, on left bank at Ellaville, 100 ft upstream from Seaboard Air Line Railroad bridge, 200 ft downstream from Withlacoochee River, 900ft upstream from bridge on U.S. Highway 90, and 127 mi upstream from mouth.

DRAINAGE AREA.--6,970 mi 2 , approximately, includes part of watershed in Okefenokee Swamp which is indeterminate.

PERIOD OF RECORD.--January 1927 to current year.

REVISED RECORDS.--WSP 1905: WDR FL-75-1: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 27.22 ft above National Geodetic Vertical Datum of 1929. Prior to June 20, 1932, nonrecording gage at same site and datum. Nov. 8, 1955 to Sept. 30, 1970, nonrecording gage 1.1 mi downstream from base gage at datum 2.67ft lower, used as supplementary gage when flow was less than 4,800 ft 3 /s.

REMARKS.--No estimated daily discharges. Records good above 5,000 cfs, and fair below. Since Nov. 7, 1953, slight regulation at low water caused by diversions above control 0.7 mi downstream from gage by a steam-electric powerplant for cooling of condensers. Total diverted flow is returned to river below control. Records include flow of large spring on left bank about 200 ft downstream; spring flow may reverse during high stages.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 5770 1530 1950 2350 3040 1940 12800 2900 1250 3640 3330 1920 2 5630 1490 1930 2520 3050 1910 12600 2770 1240 3520 3540 1890 3 5340 1460 1860 2690 3040 1890 12400 2660 1220 3550 3600 1890 4 4940 1420 1630 2870 3000 1950 12300 2560 1190 3890 3520 1890 5 4520 1400 1590 3070 2960 1970 12200 2470 1190 4170 3410 1880

6 4170 1380 1570 3240 2930 2100 12200 2390 1170 4540 3380 1920 7 3970 1340 1520 3320 2900 2210 12100 2310 1150 5230 3880 2020 8 3690 1310 1490 3300 2860 2370 11900 2230 1130 5550 4540 2050 9 3540 1290 1470 3120 2820 2650 11600 2170 1130 5580 4890 2060 10 3400 1270 1460 2940 2770 3000 11200 2120 1170 5250 4690 2060

11 3220 1240 1420 2820 2700 3420 10700 2080 1150 5000 4400 2040 12 3050 1220 1390 2770 2620 3860 10300 2020 1660 4740 4170 2030 13 2910 1190 1360 2700 2570 4520 9830 1970 4930 4520 4000 2000 14 2790 1190 1350 2680 2510 5250 9350 1900 7480 4330 3820 1990 15 2690 1160 1340 2660 2470 5650 8800 1820 9110 4140 3580 2020

16 2590 1180 1370 2600 2440 6070 8160 1770 9320 4020 3380 1990 17 2480 1210 1410 2560 2410 6490 7540 1720 8410 3830 3240 1890 18 2380 1170 1460 2520 2390 6870 6980 1670 7460 3640 3140 1800 19 2300 1160 1560 2470 2360 7430 6510 1620 6880 3510 3050 1740 20 2210 1150 1580 2430 2320 8420 6120 1590 6560 3400 2960 1690

21 2140 1200 1580 2370 2270 9550 5750 1550 6270 3240 2870 1650 22 2060 1210 1600 2320 2220 10600 5390 1500 5950 3040 2780 1600 23 1990 1190 1610 2310 2160 11600 5030 1470 5580 2880 2690 1630 24 1930 1210 1570 2360 2100 12300 4670 1430 5230 2840 2570 1720 25 1870 1350 1570 2350 2080 12800 4320 1390 5000 2900 2470 1770

26 1810 1540 1560 2410 2040 13000 3980 1360 4850 3030 2340 1800 27 1760 1730 1550 2600 2000 13100 3700 1340 4690 3120 2240 1800 28 1710 1870 1570 2820 1970 13200 3450 1310 4470 3120 2160 1790 29 1660 1940 1590 2950 --- 13200 3230 1290 4190 3150 2060 1730 30 1610 1960 1800 3050 --- 13100 3050 1280 3880 3160 1980 1690 31 1570 --- 2070 3050 --- 12900 --- 1250 --- 3170 1940 ---

MEAN 2958 1365 1574 2717 2536 6946 8272 1868 4164 3861 3246 1865 MAX 5770 1960 2070 3320 3050 13200 12800 2900 9320 5580 4890 2060 MIN 1570 1150 1340 2310 1970 1890 3050 1250 1130 2840 1940 1600 IN. .49 .22 .26 .45 .38 1.15 1.32 .31 .67 .64 .54 .30

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1927 - 2001, BY WATER YEAR (WY)

MEAN 4905 3467 4178 6248 9309 11810 11150 6073 4201 4431 5681 5197 MAX 32940 35590 30600 21150 30720 36610 53180 25380 17800 14380 34990 30760 (WY) 1929 1948 1948 1977 1991 1998 1948 1928 1973 1991 1928 1928 MIN 1006 895 833 882 1189 1240 1702 1245 792 877 1010 1082 (WY) 1991 2000 2000 2000 1957 1955 1968 1932 2000 2000 1955 1990

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1927 - 2001

ANNUAL MEAN 1817 3450 6412 HIGHEST ANNUAL MEAN 19710 1948 LOWEST ANNUAL MEAN 1296 1955 HIGHEST DAILY MEAN 6530 Sep 14 13200 Mar 28 94700 Apr 8 1948 LOWEST DAILY MEAN 720 Jun 20 1130 Jun 8 720 Jun 20 2000 ANNUAL SEVEN-DAY MINIMUM 740 Jun 16 1160 Jun 5 740 Jun 16 2000 MAXIMUM PEAK FLOW 13200 Mar 29 95300 Apr 7 1948 MAXIMUM PEAK STAGE 13.00 Mar 29 40.88 Apr 7 1948 INSTANTANEOUS LOW FLOW 1190 Nov 23 703 Jun 20 2000 ANNUAL RUNOFF (INCHES) 3.55 6.72 12.50 10 PERCENT EXCEEDS 3750 6920 14600 50 PERCENT EXCEEDS 1420 2480 3840 90 PERCENT EXCEEDS 825 1350 149062 SUWANNEE RIVER BASIN

02319500 SUWANNEE RIVER AT ELLAVILLE, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 5.98 2.45 2.57 3.04 3.69 2.72 12.90 3.49 2.04 4.12 3.86 2.62 2 5.85 2.42 2.55 3.21 3.69 2.69 12.39 3.38 2.04 4.02 4.04 2.60 3 5.59 2.39 2.50 3.35 3.69 2.67 12.24 3.28 2.02 4.04 4.09 2.60 4 5.22 2.36 2.31 3.52 3.65 2.72 12.16 3.19 1.99 4.32 4.02 2.60 5 4.84 2.34 2.28 3.69 3.62 2.74 12.07 3.11 1.99 4.56 3.93 2.59

6 4.52 2.32 2.26 3.83 3.59 2.85 12.00 3.04 1.98 4.87 3.90 2.62 7 4.34 2.29 2.22 3.90 3.56 2.94 11.90 2.97 1.96 5.49 4.32 2.71 8 4.33 2.26 2.23 3.89 3.53 3.08 11.74 2.90 1.94 5.78 4.87 2.74 9 4.24 2.25 2.36 3.75 3.49 3.33 11.46 2.84 1.94 5.81 5.18 2.75 10 4.11 2.23 2.34 3.60 3.45 3.63 11.05 2.86 1.97 5.50 4.99 2.74

11 3.94 2.20 2.32 3.49 3.38 3.97 10.60 2.86 1.96 5.27 4.75 2.73 12 3.79 2.18 2.30 3.49 3.32 4.33 10.19 2.82 2.40 5.03 4.55 2.73 13 3.67 2.16 2.27 3.51 3.26 4.86 9.79 2.78 5.24 4.85 4.41 2.70 14 3.57 2.16 2.27 3.50 3.22 5.51 9.33 2.61 7.57 4.69 4.27 2.69 15 3.47 2.14 2.27 3.48 3.18 5.87 8.81 2.53 9.11 4.53 4.07 2.71

16 3.38 2.15 2.30 3.44 3.15 6.26 8.21 2.49 9.30 4.43 3.91 2.69 17 3.29 2.18 2.32 3.39 3.13 6.65 7.63 2.45 8.44 4.28 3.79 2.60 18 3.20 2.15 2.22 3.35 3.10 7.01 7.11 2.41 7.55 4.12 3.71 2.53 19 3.13 2.13 2.30 3.31 3.08 7.53 6.67 2.36 7.01 4.01 3.63 2.48 20 3.05 2.11 2.32 3.27 3.05 8.45 6.31 2.33 6.71 3.92 3.55 2.44

21 2.98 1.90 2.33 3.22 3.01 9.52 5.96 2.30 6.45 3.79 3.46 2.40 22 2.92 1.89 2.35 3.18 2.96 10.52 5.63 2.26 6.15 3.62 3.38 2.35 23 2.86 1.88 2.36 3.16 2.90 11.42 5.30 2.23 5.81 3.47 3.30 2.38 24 2.80 1.95 2.49 3.15 2.86 12.12 4.98 2.20 5.49 3.44 3.20 2.46 25 2.75 2.15 2.53 3.07 2.83 12.58 4.68 2.17 5.27 3.49 3.11 2.51

26 2.70 2.20 2.52 3.13 2.80 12.82 4.41 2.14 5.13 3.61 2.99 2.53 27 2.65 2.37 2.51 3.29 2.76 12.93 4.17 2.12 5.00 3.68 2.90 2.53 28 2.61 2.49 2.50 3.49 2.74 12.95 3.96 2.10 4.81 3.69 2.83 2.52 29 2.57 2.56 2.37 3.61 --- 12.97 3.78 2.08 4.57 3.72 2.75 2.47 30 2.53 2.58 2.56 3.69 --- 12.90 3.63 2.07 4.32 3.72 2.68 2.43 31 2.49 --- 2.80 3.70 --- 12.76 --- 2.04 --- 3.73 2.64 ---

TOTAL 113.37 66.84 73.83 106.70 90.69 223.30 251.06 80.41 138.16 133.60 117.08 77.45 MEAN 3.66 2.23 2.38 3.44 3.24 7.20 8.37 2.59 4.61 4.31 3.78 2.58 MAX 5.98 2.58 2.80 3.90 3.69 12.97 12.90 3.49 9.30 5.81 5.18 2.75 MIN 2.49 1.88 2.22 3.04 2.74 2.67 3.63 2.04 1.94 3.44 2.64 2.35

CAL YR 2000 TOTAL 963.55 MEAN 2.63 MAX 6.68 MIN 1.47 WTR YR 2001 TOTAL 1472.49 MEAN 4.03 MAX 12.97 MIN 1.8863 SUWANNEE RIVER BASIN

02319800 SUWANNEE RIVER AT DOWLING PARK, FL

LOCATION.--Lat 30 ° 14'41", long 83 ° 14'59", in NW 1 ⁄ 4 sec. 8, T. 3 S., R. 11 E., Lafayette County, Hydrologic Unit 03110205, at bridge on County Road 250 at Dowling Park, and 112 mi upstream from mouth.

DRAINAGE AREA.--7,190 mi 2 , approximately, includes part of watershed in Okefenokee Swamp which is indeterminate.

PERIOD OF RECORD.--March 1950 to August 1954 and November 1975 to October 1977 (annual maximum discharge and gage-height), October 1996 to current year.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929.

REMARKS.--Records fair.

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Apr. 7, 1948, reached a stage of 61.46 ft, from floodmarks; discharge, 92,600 ft 3 /s.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 5020 1690 1770 2280 2990 1890 10600 3150 1450 3680 3250 1990 2 4950 1660 1760 2470 2990 1860 10400 3010 1450 3540 3410 1960 3 4800 1630 1740 2640 2990 1840 10300 2880 1430 3500 3500 1970 4 4540 1620 1720 2820 2970 1880 10200 2760 1410 3660 3480 1970 5 4230 1600 1700 3020 2920 1870 10200 2660 1410 3840 3410 1940

6 3940 1580 1690 3190 2890 1930 10100 2560 1410 4040 3360 1950 7 3720 1560 1660 3300 2860 2040 10100 2470 1390 4440 3540 2030 8 3640 1540 1630 3330 2830 2170 9970 2380 1370 4740 3970 2060 9 3570 1520 1590 3250 2790 2400 9790 2310 1380 4860 4320 2070 10 3460 1490 1580 3120 2740 2700 9490 2250 1410 4720 4300 2060

11 3310 1460 1550 3000 2670 3040 9130 2180 1410 4560 4170 2050 12 3130 1450 1530 2910 2600 3380 8780 2120 1540 4390 4010 2040 13 2980 1430 1510 2850 2530 3650 8460 2060 3290 4250 3890 2010 14 2850 1430 1500 2830 2470 4110 8120 2000 5390 4140 3780 2000 15 2740 1400 1500 2800 2420 4490 7720 1940 6950 3990 3620 2000

16 2640 1410 1520 2750 2390 4790 7260 1890 7520 3890 3460 1990 17 2550 1430 1550 2700 2350 5130 6790 1830 7110 3780 3330 1940 18 2470 1410 1590 2650 2300 5460 6360 1790 6480 3650 3230 1880 19 2390 1400 1650 2620 2280 5850 5990 1750 6010 3530 3150 1830 20 2310 1400 1680 2570 2250 6550 5670 1720 5740 3440 3050 1780

21 2250 1410 1710 2500 2210 7400 5380 1690 5540 3340 2960 1740 22 2180 1400 1720 2460 2160 8250 5090 1650 5330 3160 2860 1700 23 2110 1390 1720 2420 2110 9060 4810 1600 5080 3010 2760 1690 24 2040 1390 1720 2420 2060 9740 4540 1580 4810 2990 2660 e1720 25 1990 1420 1730 2450 2030 10200 4300 1560 4610 2970 2550 1750

26 1940 1430 1720 2500 1980 10500 4070 1530 4490 3060 2430 1780 27 1890 1530 1720 2590 1930 10700 3850 1500 4380 3140 2320 1800 28 1850 1660 1730 2720 1900 10700 3660 1490 4240 3150 2230 1790 29 1800 1740 1730 2860 --- 10800 3480 1490 4070 3160 2140 1740 30 1760 1770 1820 2970 --- 10800 3310 1470 3870 3170 2060 1700 31 1720 --- 2030 3000 --- 10700 --- 1450 --- 3200 2000 ---

MEAN 2928 1508 1670 2774 2486 5674 7264 2023 3732 3709 3200 1898 MAX 5020 1770 2030 3330 2990 10800 10600 3150 7520 4860 4320 2070 MIN 1720 1390 1500 2280 1900 1840 3310 1450 1370 2970 2000 1690 IN. .47 .23 .27 .44 .36 .91 1.13 .32 .58 .59 .51 .29

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1997 - 2001, BY WATER YEAR (WY)

MEAN 4645 4068 4346 6175 8408 12280 6982 3306 2628 2479 2720 2476 MAX 10700 10650 13190 18280 22750 38110 17010 6430 4165 3995 5699 3675 (WY) 1999 1998 1998 1998 1998 1998 1998 1998 1997 1997 1997 2000 MIN 1388 1262 1140 1118 1577 1938 2047 1409 1030 1049 1144 1132 (WY) 2000 2000 2000 2000 2000 2000 1999 1999 2000 2000 2000 1999

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1997 - 2001

ANNUAL MEAN 1868 3241 5028 HIGHEST ANNUAL MEAN 11550 1998 LOWEST ANNUAL MEAN 1673 2000 HIGHEST DAILY MEAN 5390 Sep 15 10800 Mar 29 53100 Mar 20 1998 LOWEST DAILY MEAN 951 Aug 31 1370 Jun 8 951 Aug 31 2000 ANNUAL SEVEN-DAY MINIMUM 970 Aug 28 1400 Jun 4 970 Aug 28 2000 MAXIMUM PEAK FLOW 10900 Mar 29 53500 Mar 20 1998 MAXIMUM PEAK STAGE 33.29 Mar 29 54.07 Mar 20 1998 INSTANTANEOUS LOW FLOW 1370 Jun 8 947 Aug 30 2000 ANNUAL RUNOFF (INCHES) 3.54 6.12 9.50 10 PERCENT EXCEEDS 3630 5910 11600 50 PERCENT EXCEEDS 1520 2550 2850 90 PERCENT EXCEEDS 1010 1520 1160

e Estimated64 SUWANNEE RIVER BASIN

02319800 SUWANNEE RIVER AT DOWLING PARK, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 26.96 22.29 22.39 23.14 24.14 22.56 33.02 24.38 21.88 25.15 24.53 22.73 2 26.88 22.24 22.37 23.42 24.14 22.52 32.86 24.18 21.87 24.95 24.77 22.68 3 26.69 22.19 22.34 23.66 24.14 22.50 32.74 23.99 21.84 24.90 24.90 22.69 4 26.38 22.16 22.31 23.90 24.11 22.56 32.66 23.83 21.82 25.12 24.87 22.69 5 26.00 22.12 22.28 24.18 24.05 22.53 32.60 23.69 21.81 25.39 24.76 22.64

6 25.63 22.09 22.26 24.44 24.00 22.64 32.54 23.55 21.81 25.66 24.69 22.66 7 25.36 22.05 22.22 24.60 23.97 22.80 32.49 23.42 21.78 26.22 24.96 22.78 8 25.25 22.02 22.16 24.65 23.92 22.99 32.38 23.29 21.75 26.62 25.57 22.83 9 25.16 21.99 22.11 24.53 23.87 23.32 32.19 23.19 21.76 26.77 26.05 22.84 10 25.02 21.95 22.08 24.34 23.80 23.75 31.88 23.10 21.82 26.60 26.04 22.84

11 24.82 21.90 22.04 24.16 23.70 24.22 31.51 23.00 21.81 26.38 25.85 22.81 12 24.59 21.87 22.01 24.03 23.60 24.72 31.15 22.91 22.02 26.15 25.63 22.81 13 24.38 21.85 21.98 23.95 23.51 25.12 30.81 22.82 24.58 25.96 25.45 22.76 14 24.20 21.84 21.96 23.92 23.43 25.77 30.44 22.74 27.39 25.80 25.29 22.74 15 24.04 21.80 21.96 23.88 23.36 26.29 30.01 22.64 29.17 25.59 25.07 22.74

16 23.93 21.81 21.99 23.82 23.31 26.68 29.51 22.56 29.79 25.46 24.84 22.74 17 23.75 21.85 22.03 23.74 23.24 27.10 28.99 22.48 29.34 25.30 24.65 22.66 18 23.60 21.82 22.10 23.67 23.17 27.48 28.51 22.41 28.64 25.11 24.50 22.57 19 23.46 21.80 22.19 23.63 23.14 27.93 28.09 22.35 28.11 24.94 24.38 22.49 20 23.32 21.79 22.25 23.56 23.11 28.72 27.72 22.31 27.81 24.81 24.23 22.42

21 23.21 21.81 22.29 23.46 23.04 29.66 27.38 22.26 27.57 24.67 24.10 22.35 22 23.10 21.79 22.30 23.40 22.98 30.59 27.04 22.19 27.33 24.40 23.97 22.30 23 22.99 21.79 22.31 23.35 22.89 31.43 26.71 22.13 27.03 24.18 23.83 22.30 24 22.89 21.78 22.30 23.35 22.82 32.14 26.36 22.09 26.71 24.15 23.69 --- 25 22.80 21.83 22.32 23.39 22.77 32.64 26.03 22.05 26.45 24.12 23.53 22.39

26 22.72 21.85 22.31 23.46 22.70 32.93 25.70 22.01 26.29 24.24 23.36 22.43 27 22.64 22.01 22.31 23.59 22.64 33.08 25.40 21.97 26.14 24.36 23.20 22.46 28 22.56 22.21 22.33 23.77 22.59 33.16 25.13 21.95 25.95 24.37 23.07 22.44 29 22.49 22.35 22.32 23.96 --- 33.23 24.87 21.94 25.71 24.40 22.94 22.38 30 22.42 22.39 22.47 24.11 --- 33.24 24.61 21.92 25.43 24.42 22.82 22.31 31 22.35 --- 22.77 24.15 --- 33.15 --- 21.88 --- 24.45 22.74 ---

MEAN 24.18 21.97 22.23 23.85 23.43 27.34 29.38 22.75 25.05 25.18 24.46 --- MAX 26.96 22.39 22.77 24.65 24.14 33.24 33.02 24.38 29.79 26.77 26.05 --- MIN 22.35 21.78 21.96 23.14 22.59 22.50 24.61 21.88 21.75 24.12 22.74 ---65 SUWANNEE RIVER BASIN

02320000 SUWANNEE RIVER AT LURAVILLE, FL

LOCATION.--Lat 30 ° 05'59", long 83 ° 10'18", in NE 1 ⁄ 4 sec. 36, T. 4 S., R. 11 E., Suwannee County, Hydrologic Unit 03110205, at bridge on State Highway 51, 1.6 mi south of Luraville, 3.0 mi north of Mayo, and 97 mi upstream from mouth.

DRAINAGE AREA.--7,330 mi 2 , approximately, includes part of watershed in Okefenokee Swamp which is indeterminate.

PERIOD OF RECORD.--February 1927 to December 1937, March 1950 to October 1972 and October 1977 to September 1981 (annual maximu m discharge and gage-height). October 1996 to current year.

GAGE.--Water-stage recorder. Datum of gage is National Vertical Datum of 1929 (Florida Department of Transportation Benchmark).

REMARKS.--No estimated daily discharges. Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 5260 1890 1850 2170 3120 1950 11100 3500 1970 3990 3550 2450 2 5220 1860 1840 2340 3110 1920 11000 3360 1960 3840 3690 2420 3 5090 1820 1830 2530 3130 1890 10900 3240 1950 3770 3790 2410 4 4880 1790 1820 2750 3100 1930 10800 3130 1940 3860 3780 2410 5 4600 1770 1800 2990 3040 1930 10700 3060 1930 4030 3720 2390

6 4330 1740 1790 3210 2990 1990 10700 2990 1930 4200 3670 2380 7 4120 1710 1770 3320 2950 2080 10700 2920 1910 4540 3770 2430 8 4010 1690 1750 3380 2910 2180 10600 2860 1880 4860 4150 2470 9 3940 1680 1720 3340 2850 2350 10400 2810 1880 5030 4520 2480 10 3850 1660 1710 3240 2790 2660 10100 2750 1920 4970 4590 2470

11 3720 1640 1690 3130 2710 3050 9790 2690 1920 4830 4490 2450 12 3570 1620 1670 3020 2620 3380 9430 2630 1950 4670 4340 2440 13 3430 1610 1660 2920 2520 3770 9080 2580 3030 4520 4200 2420 14 3310 1610 1640 2880 2440 4200 8730 2520 5060 4410 4090 2400 15 3210 1590 1640 2850 2370 4600 8330 2470 6590 4250 3950 2400

16 3110 1580 1640 2800 2330 4890 7870 2420 7330 4150 3790 2380 17 3010 1600 1670 2730 2310 5210 7370 2380 7180 4040 3650 2340 18 2920 1600 1690 2660 2270 5540 6920 2330 6670 3910 3550 2280 19 2810 1590 1730 2570 2250 5890 6540 2290 6260 3790 3470 2230 20 2690 1580 1770 2570 2230 6480 6210 2250 6000 3710 3380 2190

21 2580 1580 1790 2450 2200 7210 5890 2220 5800 3640 3300 2150 22 2490 1570 1800 2390 2150 8070 5580 2190 5610 3470 3220 2110 23 2390 1570 1810 2350 2130 8940 5280 2160 5400 3320 3140 2110 24 2290 1570 1800 2330 2080 9740 4990 2120 5140 3340 3050 2110 25 2230 1580 1810 2350 2050 10400 4730 2100 4920 3270 2950 2140

26 2170 1590 1810 2390 2030 10800 4470 2080 4770 3340 2870 2160 27 2120 1640 1800 2500 1990 11000 4230 2040 4660 3440 2760 2170 28 2070 1740 1810 2660 1960 11200 4020 2020 4530 3460 2680 2170 29 2020 1810 1810 2850 --- 11300 3830 2010 4380 3470 2600 2140 30 1980 1850 1840 3030 --- 11300 3660 2000 4190 3500 2530 2100 31 1930 --- 1980 3120 --- 11300 --- 1980 --- 3510 2480 ---

MEAN 3269 1671 1766 2768 2522 5779 7798 2519 4022 3972 3539 2307 MAX 5260 1890 1980 3380 3130 11300 11100 3500 7330 5030 4590 2480 MIN 1930 1570 1640 2170 1960 1890 3660 1980 1880 3270 2480 2100 IN. .52 .26 .28 .44 .36 .92 1.20 .40 .62 .63 .56 .35

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1927 - 2001, BY WATER YEAR (WY)

MEAN 7645 4505 4098 5356 7998 10320 9818 6259 3830 3932 6292 6501 MAX 31460 12180 13710 18570 22980 34680 24050 24060 8453 11430 32590 28650 (WY) 1929 1929 1998 1998 1998 1998 1930 1928 1928 1928 1928 1928 MIN 1529 1316 1173 1176 1565 1969 2248 1599 1101 1112 1265 1383 (WY) 2000 2000 2000 2000 1934 2000 1934 1999 2000 2000 2000 1999

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1927 - 2001

ANNUAL MEAN 1973 3497 6527 HIGHEST ANNUAL MEAN 12570 1929 LOWEST ANNUAL MEAN 1746 2000 HIGHEST DAILY MEAN 5360 Sep 15 11300 Mar 29 66000 Aug 24 1928 LOWEST DAILY MEAN 1050 Jun 20 1570 Nov 22 1050 Jun 20 2000 ANNUAL SEVEN-DAY MINIMUM 1070 Jun 14 1580 Nov 19 1070 Jun 14 2000 MAXIMUM PEAK FLOW 11400 Mar 29 90000 Apr 8 1948 MAXIMUM PEAK STAGE 27.47 Mar 29 53.50 Apr 8 1948 INSTANTANEOUS LOW FLOW 1560 Nov 24 1050 Jun 20 2000 ANNUAL RUNOFF (INCHES) 3.69 6.52 12.18 10 PERCENT EXCEEDS 3790 6230 14800 50 PERCENT EXCEEDS 1590 2730 3850 90 PERCENT EXCEEDS 1110 1770 163066 SUWANNEE RIVER BASIN

02320000 SUWANNEE RIVER AT LURAVILLE, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 22.12 18.25 18.24 18.79 19.72 18.43 27.30 20.19 17.86 20.78 20.25 18.75 2 22.08 18.19 18.23 19.05 19.71 18.36 27.19 20.01 17.83 20.59 20.42 18.70 3 21.96 18.15 18.22 19.24 19.72 18.31 27.10 19.86 17.82 20.52 20.54 18.69 4 21.74 18.10 18.19 19.42 19.70 18.38 27.04 19.71 17.80 20.63 20.53 18.69 5 21.45 18.07 18.16 19.62 19.66 18.36 27.00 19.58 17.79 20.83 20.46 18.67

6 21.16 18.03 18.13 19.82 19.62 18.42 26.96 19.46 17.79 21.02 20.39 18.65 7 20.92 17.99 18.10 19.96 19.58 18.56 26.93 19.35 17.76 21.38 20.51 18.73 8 20.79 17.95 18.06 20.04 19.55 18.70 26.86 19.24 17.71 21.72 20.96 18.80 9 20.72 17.93 18.00 19.98 19.51 18.95 26.73 19.14 17.71 21.89 21.37 18.81 10 20.61 17.90 17.99 19.86 19.46 19.29 26.52 19.04 17.78 21.83 21.43 18.81

11 20.46 17.85 17.95 19.73 19.39 19.65 26.24 18.96 17.77 21.69 21.33 18.79 12 20.28 17.82 17.91 19.64 19.31 20.03 25.95 18.88 17.83 21.53 21.16 18.78 13 20.11 17.80 17.89 19.56 19.23 20.52 25.66 18.80 19.48 21.36 21.01 18.75 14 19.95 17.80 17.86 19.53 19.16 21.01 25.36 18.72 21.91 21.24 20.89 18.73 15 19.82 17.76 17.86 19.50 19.09 21.45 25.01 18.64 23.39 21.07 20.73 18.73

16 19.69 17.74 17.85 19.47 19.04 21.75 24.60 18.57 24.11 20.95 20.54 18.71 17 19.56 17.78 17.91 19.41 19.01 22.07 24.14 18.50 23.96 20.83 20.37 18.65 18 19.43 17.77 17.95 19.35 18.96 22.39 23.71 18.43 23.48 20.68 20.25 18.57 19 19.32 17.75 18.04 19.28 18.92 22.72 23.34 18.36 23.06 20.54 20.15 18.49 20 19.20 17.74 18.10 19.27 18.88 23.28 23.02 18.30 22.82 20.45 20.05 18.43

21 19.09 17.74 18.13 19.17 18.83 24.00 22.72 18.26 22.64 20.36 19.94 18.37 22 19.00 17.72 18.16 19.12 18.76 24.78 22.43 18.21 22.46 20.15 19.84 18.32 23 18.90 17.72 18.17 19.07 18.72 25.54 22.14 18.17 22.25 19.96 19.73 18.32 24 18.80 17.72 18.16 19.05 18.65 26.20 21.85 18.10 22.00 19.98 19.61 18.33 25 18.72 17.73 18.17 19.08 18.60 26.71 21.58 18.06 21.78 19.90 19.48 18.38

26 18.64 17.76 18.18 19.12 18.55 27.02 21.30 18.03 21.63 19.99 19.35 18.41 27 18.57 17.85 18.15 19.21 18.50 27.20 21.04 17.97 21.51 20.11 19.20 18.44 28 18.49 18.04 18.18 19.35 18.44 27.32 20.81 17.93 21.37 20.14 19.08 18.44 29 18.42 18.18 18.18 19.50 --- 27.42 20.59 17.92 21.21 20.15 18.97 18.41 30 18.37 18.24 18.23 19.65 --- 27.44 20.39 17.91 21.00 20.19 18.87 18.34 31 18.30 --- 18.48 19.72 --- 27.39 --- 17.87 --- 20.21 18.79 ---

TOTAL 616.67 537.07 560.83 602.56 536.27 691.65 731.51 580.17 613.51 642.67 626.20 557.69 MEAN 19.89 17.90 18.09 19.44 19.15 22.31 24.38 18.72 20.45 20.73 20.20 18.59 MAX 22.12 18.25 18.48 20.04 19.72 27.44 27.30 20.19 24.11 21.89 21.43 18.81 MIN 18.30 17.72 17.85 18.79 18.44 18.31 20.39 17.87 17.71 19.90 18.79 18.32

WTR YR 2001 TOTAL 7296.80 MEAN 19.99 MAX 27.44 MIN 17.7167 SUWANNEE RIVER BASIN

02320500 SUWANNEE RIVER AT BRANFORD, FL

LOCATION.--Lat 29 ° 57'20", long 82 ° 55'40", in NE 1 ⁄ 4 sec. 20, T. 6 S., R. 14 E., Suwannee County, Hydrologic Unit 03110205, near left bank on upstream side of bridge on U.S. Highway 27 at Branford, 10.2 mi upstream from Santa Fe River, and 75 mi upstrea m from mouth.

DRAINAGE AREA.--7,880 mi 2 , approximately, includes part of watershed in Okefenokee Swamp which is indeterminate.

PERIOD OF RECORD.--July 1931 to current year.

REVISED RECORDS.--WSP 1905: WDR FL-75-1: Drainage area. WDR FL-96-4:1995.

GAGE.--Water-stage recorder. Datum of gage is 4.81 ft above National Geodetic Vertical Datum of 1929.

REMARKS.--Records good.

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of August 1928 reached a stage of 32.0 ft, from floodmark; discharge, 65,000 ft 3 /s computed on basis of measured crest flow at Ellaville (station 02319500).

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 4900 2510 2330 2590 3510 2630 10800 4440 2350 e5000 4390 3170 2 5240 2480 2330 2780 3500 2600 10700 4270 2350 e4830 4470 3130 3 5350 2440 2320 2940 3500 2590 10700 4120 2320 4660 4590 3100 4 5220 2400 2300 3090 3510 2610 10600 3980 2300 4650 4650 3080 5 5030 2380 2280 3240 3490 2590 10600 3850 2290 4760 4660 3050

6 4820 2350 2280 3400 3460 2560 10600 3750 2290 4900 4610 3040 7 4630 2340 2270 3540 3430 2610 10700 3640 2270 5080 4580 3040 8 4440 2310 2250 3650 3400 2690 10600 3540 2240 5370 4780 3070 9 4330 2300 2230 3690 3380 2810 10600 3450 2220 5570 5090 3080 10 4240 2290 2210 3630 3350 3010 10400 3370 2260 5640 5280 3070

11 4150 2240 2190 3560 3300 3220 10200 3290 2290 5580 5290 3060 12 4030 2210 2170 3510 3240 3480 9950 3220 2320 5500 5210 3050 13 3900 2190 2140 3440 3180 3820 9690 3150 2690 5390 5100 3030 14 3780 2190 2130 3400 3130 4130 9420 3070 4250 5280 4990 3000 15 3680 2160 2120 3390 3090 4510 9120 3010 5680 5120 4900 2970

16 3580 2140 2120 3360 3050 4820 8770 2950 6680 5000 4760 2950 17 3480 2150 2140 3330 3020 5030 8330 2900 7040 4890 4620 2940 18 3390 2150 2130 3300 2970 5300 7890 2840 6890 4800 4510 2910 19 3300 2130 2160 3280 2930 5550 7510 2780 6690 4690 4410 2870 20 3210 2120 2200 3270 2920 5970 7170 2740 e6430 4600 4310 2830

21 3120 2110 2230 3180 2900 6510 6880 2700 e6310 4570 4200 2800 22 3040 2100 2250 3120 2870 7180 6590 2660 e6190 4390 4100 2770 23 2970 2100 2250 3090 2830 7930 6320 2610 e6110 4230 3990 2750 24 2890 2110 2250 3070 2770 8690 6050 2570 e5950 4290 3890 2730 25 2830 2150 2250 3070 2760 9380 5800 2530 5730 4190 3780 2740

26 2790 2150 2250 3080 2720 9880 5530 2510 e5570 4160 3670 2740 27 2740 2140 2280 3120 2680 10200 5270 2470 e5460 4230 3560 2740 28 2690 2200 2320 3190 2640 10400 5040 2440 e5360 4300 3450 2750 29 2650 2260 2340 3290 --- 10700 4830 2420 e5240 4320 3350 2720 30 2600 2310 2330 3410 --- 10800 4620 2400 e5140 4350 3270 2670 31 2560 --- 2430 3490 --- 10800 --- 2370 --- 4380 3210 ---

MEAN 3728 2237 2241 3274 3126 5645 8376 3098 4364 4797 4376 2928 MAX 5350 2510 2430 3690 3510 10800 10800 4440 7040 5640 5290 3170 MIN 2560 2100 2120 2590 2640 2560 4620 2370 2220 4160 3210 2670 MED 3580 2200 2250 3290 3110 4820 8940 2950 5190 4760 4510 2960 IN. .55 .32 .33 .48 .41 .83 1.19 .45 .62 .70 .64 .41

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1931 - 2001, BY WATER YEAR (WY)

MEAN 5424 4359 4725 6423 9188 11810 11630 7296 5335 5202 6048 5923 MAX 21020 29380 28130 21830 28370 36930 49040 24020 18120 13510 19810 21340 (WY) 1965 1948 1948 1948 1991 1998 1948 1973 1973 1991 1945 1964 MIN 1778 1666 1602 1623 1699 1905 2366 1937 1503 1607 1670 1769 (WY) 1991 1991 1991 1956 1957 1955 1955 1932 2000 2000 2000 1990

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1931 - 2001

ANNUAL MEAN 2351 4018 6941 HIGHEST ANNUAL MEAN 19260 1948 LOWEST ANNUAL MEAN 1950 1955 HIGHEST DAILY MEAN 5350 Oct 3 10800 Mar 30 82800 Apr 11 1948 LOWEST DAILY MEAN 1420 Jun 19 2100 Nov 22 1420 Jun 19 2000 ANNUAL SEVEN-DAY MINIMUM 1430 Jun 15 2120 Nov 18 1430 Jun 15 2000 MAXIMUM PEAK FLOW 10900 Mar 31 83900 Apr 11 1948 MAXIMUM PEAK STAGE 13.19 Mar 31 34.07 Apr 11 1948 INSTANTANEOUS LOW FLOW 2090 Nov 23 1410 Jun 20 2000 ANNUAL RUNOFF (INCHES) 4.06 6.92 11.97 10 PERCENT EXCEEDS 3750 6540 14400 50 PERCENT EXCEEDS 2150 3290 4870 90 PERCENT EXCEEDS 1560 2250 2300

e Estimated68 SUWANNEE RIVER BASIN

02320500 SUWANNEE RIVER AT BRANFORD, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 8.31 4.19 3.85 4.14 5.38 3.94 13.15 6.68 3.43 --- 6.40 4.79 2 8.31 4.12 3.85 4.43 5.37 3.90 13.09 6.45 3.42 --- 6.51 4.74 3 8.24 4.05 3.82 4.67 5.37 3.87 13.04 6.25 3.38 6.61 6.67 4.69 4 8.10 3.98 3.78 4.88 5.37 3.91 13.01 6.05 3.34 6.60 6.76 4.67 5 7.86 3.93 3.76 5.09 5.35 3.88 12.99 5.88 3.31 6.76 6.77 4.62

6 7.61 3.89 3.74 5.31 5.31 3.83 13.02 5.73 3.32 6.94 6.72 4.60 7 7.37 3.86 3.72 5.48 5.26 3.91 13.04 5.57 3.29 7.19 6.68 4.61 8 7.12 3.81 3.69 5.62 5.21 4.05 13.02 5.42 3.22 7.56 6.95 4.67 9 6.98 3.79 3.65 5.64 5.18 4.27 12.97 5.28 3.18 7.81 7.36 4.69 10 6.87 3.77 3.60 5.55 5.14 4.60 12.85 5.17 3.22 7.91 7.61 4.68

11 6.74 3.66 3.56 5.45 5.05 4.93 12.67 5.04 3.22 7.83 7.62 4.66 12 6.58 3.60 3.53 5.38 4.96 5.34 12.45 4.93 3.24 7.74 7.53 4.65 13 6.39 3.58 3.48 5.27 4.87 5.83 12.22 4.82 3.86 7.61 7.39 4.62 14 6.23 3.57 3.46 5.21 4.79 6.27 11.99 4.69 6.18 7.48 7.26 4.58 15 6.08 3.52 3.43 5.19 4.72 6.77 11.73 4.59 7.99 7.28 7.15 4.53

16 5.94 3.47 3.43 5.15 4.66 7.19 11.41 4.50 9.11 7.12 6.97 4.52 17 5.79 3.50 3.47 5.11 4.60 7.45 11.01 4.40 9.46 7.00 6.79 4.50 18 5.64 3.49 3.46 5.05 4.52 7.78 10.59 4.30 9.31 6.87 6.64 4.45 19 5.50 3.45 3.51 5.02 4.47 8.09 10.22 4.21 9.08 6.74 6.51 4.38 20 5.36 3.43 3.60 5.01 4.44 8.57 9.88 4.13 --- 6.62 6.39 4.33

21 5.22 3.40 3.65 4.86 4.41 9.17 9.57 4.07 --- 6.58 6.25 4.29 22 5.09 3.39 3.69 4.77 4.36 9.88 9.26 4.00 --- 6.35 6.11 4.24 23 4.97 3.38 3.69 4.72 4.28 10.63 8.97 3.91 --- 6.15 5.97 4.20 24 4.85 3.40 3.69 4.69 4.20 11.34 8.67 3.83 --- 6.23 5.84 4.18 25 4.75 3.48 3.68 4.69 4.17 11.95 8.38 3.77 --- 6.10 5.68 4.19

26 4.67 3.48 3.69 4.71 4.10 12.39 8.07 3.72 --- 6.06 5.53 4.20 27 4.59 3.47 3.71 4.78 4.03 12.66 7.74 3.66 --- 6.17 5.37 4.21 28 4.51 3.59 3.75 4.89 3.97 12.85 7.46 3.60 --- 6.26 5.21 4.22 29 4.43 3.72 3.77 5.04 --- 13.03 7.19 3.56 --- 6.30 5.07 4.18 30 4.35 3.81 3.72 5.22 --- 13.16 6.93 3.53 --- 6.33 4.94 4.09 31 4.26 --- 3.86 5.35 --- 13.18 --- 3.46 --- 6.39 4.85 ---

TOTAL 188.71 109.78 113.29 156.37 133.54 238.62 326.59 145.20 --- --- 199.50 133.98 MEAN 6.09 3.66 3.65 5.04 4.77 7.70 10.89 4.68 --- --- 6.44 4.47 MAX 8.31 4.19 3.86 5.64 5.38 13.18 13.15 6.68 --- --- 7.62 4.79 MIN 4.26 3.38 3.43 4.14 3.97 3.83 6.93 3.46 --- --- 4.85 4.09

CAL YR 2000 TOTAL 1498.71 MEAN 4.09 MAX 8.31 MIN 2.5169 SUWANNEE RIVER BASIN

02321000 NEW RIVER NEAR LAKE BUTLER, FL

LOCATION.--Lat 29 ° 59'53", long 82 ° 16'27", in SW 1 ⁄ 4 sec. 2, T. 6. S., R. 20 E., Union County, Hydrologic Unit 03110206, near right bank on downstream side of bridge on State Highway 100, and 4.4 miles southeast of Lake Butler.

DRAINAGE AREA.--191 mi 2

. PERIOD OF RECORD.--January 1950 to September 1971, June 1973 to May 1977, periodic discharge measurements. October 1990 to September 1991, October 1992 to current year.

REVISED RECORDS.--WRD FLA. 1968 Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 83.8 ft above National Geodetic Vertical Datum of 1929.

REMARKS.--No estimated daily discharges. Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 20 2.7 3.8 7.4 4.5 1.8 16 .70 .01 17 126 13 2 19 2.5 3.6 6.8 4.8 2.2 14 .63 .00 21 156 55 3 17 2.3 3.6 6.6 4.4 2.3 12 .56 .00 18 140 85 4 16 2.3 3.5 6.4 4.4 4.0 9.8 .52 .00 12 120 81 5 15 2.1 3.5 6.2 4.6 6.1 8.2 .41 .01 20 136 63

6 15 2.0 3.5 6.2 4.4 6.2 7.0 .26 .01 9.3 342 49 7 18 2.0 3.6 6.2 3.9 4.1 5.9 .19 .01 5.0 525 43 8 16 1.9 3.6 6.2 3.4 2.9 4.9 .17 .01 2.9 479 44 9 15 1.9 3.6 6.5 3.1 2.3 4.2 .19 .01 2.3 402 61 10 18 2.0 3.7 6.4 2.9 2.9 3.6 .16 .01 3.3 276 48

11 17 2.0 4.1 6.1 2.8 3.2 3.1 .12 .01 6.7 186 39 12 15 2.0 4.3 6.6 2.7 2.9 2.6 .09 .06 8.4 130 38 13 13 1.9 4.3 6.8 2.6 2.6 2.3 .08 .26 3.9 93 41 14 11 2.0 4.5 6.7 2.3 2.6 2.1 .07 .24 3.4 64 63 15 9.7 2.0 4.6 6.6 2.3 2.6 1.8 .07 .95 2.6 49 189

16 8.5 1.9 4.7 6.5 2.3 4.1 1.7 .06 .61 1.8 37 910 17 7.4 1.9 5.2 6.4 2.2 5.0 1.6 .05 .33 1.3 29 1250 18 6.4 2.0 5.3 6.6 2.1 5.2 1.3 .04 .18 1.0 22 1190 19 5.6 2.1 5.7 6.8 2.0 8.6 1.3 .03 .25 .81 18 836 20 5.3 2.2 5.7 8.1 1.8 21 1.1 .03 1.0 1.4 16 547

21 5.0 2.3 5.6 8.0 1.8 25 1.0 .02 1.1 4.4 15 337 22 4.8 2.1 5.6 7.3 1.8 20 1.0 .01 1.8 3.2 14 224 23 4.4 2.1 5.6 6.7 1.9 18 .96 .01 2.3 2.5 11 175 24 4.0 2.2 5.6 5.8 1.9 16 .87 .01 3.1 1.7 8.9 134 25 4.3 3.9 5.5 5.3 1.9 15 1.1 .01 3.1 1.2 7.0 111

26 4.1 6.2 5.5 4.6 1.9 16 1.8 .01 2.3 .93 5.4 94 27 3.8 6.8 5.4 4.1 1.8 15 1.7 .01 2.8 .91 4.2 81 28 3.6 5.5 6.6 3.7 1.8 13 1.4 .01 5.8 3.3 3.3 68 29 3.2 4.5 8.8 3.5 --- 12 1.0 .01 12 28 2.7 58 30 3.0 4.1 9.3 3.4 --- 16 .80 .01 15 13 2.4 49 31 2.9 --- 8.3 3.8 --- 17 --- .01 --- 78 2.7 ---

MEAN 10.0 2.71 5.04 6.07 2.80 8.89 3.87 .15 1.78 9.01 110 233 MAX 20 6.8 9.3 8.1 4.8 25 16 .70 15 78 525 1250 MIN 2.9 1.9 3.5 3.4 1.8 1.8 .80 .01 .00 .81 2.4 13 IN. .06 .02 .03 .04 .02 .05 .02 .00 .01 .05 .67 1.36

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1950 - 2001, BY WATER YEAR (WY)

MEAN 242 44.7 109 129 266 256 134 100 78.2 145 249 246 MAX 1461 459 781 607 1836 1491 1014 801 556 519 772 1845 (WY) 1993 1970 1954 1970 1998 1959 1991 1959 1957 1950 1970 1964 MIN 1.53 .37 1.54 3.23 2.80 3.17 2.52 .045 .52 1.06 1.32 .73 (WY) 1991 2000 2000 2000 2001 2000 1956 2000 1998 1999 1999 1999

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1950 - 2001

ANNUAL MEAN 12.4 32.7 167 HIGHEST ANNUAL MEAN 457 1970 LOWEST ANNUAL MEAN 9.66 1962 HIGHEST DAILY MEAN 185 Sep 12 1250 Sep 17 10400 Sep 13 1964 LOWEST DAILY MEAN .00 May 16 .00 Jun 2 .00 May 16 2000 ANNUAL SEVEN-DAY MINIMUM .00 May 16 .01 May 29 .00 May 16 2000 MAXIMUM PEAK FLOW 1330 Sep 17 11400 Sep 12 1964 MAXIMUM PEAK STAGE 8.47 Sep 17 15.33 Sep 12 1964 INSTANTANEOUS LOW FLOW .00 Jun 2 .00 May 16 2000 ANNUAL RUNOFF (INCHES) .88 2.33 11.85 10 PERCENT EXCEEDS 36 51 425 50 PERCENT EXCEEDS 3.3 4.1 28 90 PERCENT EXCEEDS .01 .19 2.770 SUWANNEE RIVER BASIN

02321500 SANTA FE RIVER AT WORTHINGTON SPRINGS, FL

LOCATION.--Lat 29 ° 55'18", long 82 ° 25'35", in SE 1 ⁄ 4 sec. 32, T. 6 S., R. 19 E., Alachua County, Hydrologic Unit 03110206, near center of span on downstream side of bridge on State Highway 121, 0.5 mi south of Worthington Springs, 0.8 mi downstream fro m New River, and 51 mi upstream from mouth.

DRAINAGE AREA.--575 mi 2

. PERIOD OF RECORD.--October 1931 to current year. Published as "near Worthington" prior to October 1965. Monthly discharge only for October 1931, published in WSP 1304.

REVISED RECORDS.--WSP 2105: WDR FL-76-4: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 42.74 ft above National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to Jan. 16, 1939, nonrecording gage at site 0.2 mi downstream at present datum; Jan. 16, 1939 to July 23, 1953, nonrecording gage at present site and datum.

REMARKS.--No estimated daily discharges. Records good. Records do not include diversions during periods of high stages from Santa Fe Lake to Lochloosa Creek in St. Johns River Basin.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 82 12 11 13 14 7.3 49 2.7 .00 35 508 9.5 2 75 11 10 12 16 7.4 40 2.3 .00 26 779 10 3 68 11 9.5 11 16 7.2 33 2.0 .00 22 647 24 4 62 10 8.6 11 17 12 27 1.7 .00 25 461 63 5 58 10 8.1 10 17 20 24 1.6 .00 32 368 81

6 54 9.5 7.9 10 17 22 21 1.3 .00 32 444 86 7 56 9.1 7.9 10 16 18 18 .85 .00 27 433 73 8 60 8.8 8.0 10 15 15 16 .95 .00 19 501 70 9 63 8.5 8.1 9.7 14 13 14 .54 .00 19 568 74 10 58 8.5 8.0 9.3 13 12 13 .25 .00 16 552 68

11 52 7.8 8.1 9.3 12 11 11 .13 .00 44 481 69 12 48 7.6 8.7 9.6 12 11 9.9 .12 .00 57 396 63 13 44 7.3 8.8 9.7 12 11 8.8 .12 .00 53 304 59 14 39 7.4 8.7 10 11 11 7.8 .06 .00 42 222 72 15 35 7.0 8.5 10 11 11 7.2 .03 .00 29 268 217

16 32 7.0 8.5 10 11 17 7.1 .02 .68 21 282 362 17 29 6.9 8.6 10 11 30 6.3 .00 .35 16 197 481 18 26 6.6 8.4 10 9.9 30 5.4 .00 .35 13 127 1030 19 24 6.3 9.2 9.7 9.6 39 4.7 .00 1.1 12 92 1510 20 22 6.1 9.1 10 9.3 71 4.2 .00 3.7 21 75 1460

21 21 5.9 8.8 11 9.2 90 3.9 .00 5.8 63 62 1160 22 19 5.7 8.6 11 9.0 77 3.7 .00 12 67 53 872 23 19 5.8 8.4 11 8.6 60 3.3 .00 16 51 44 1070 24 18 5.9 8.6 11 8.5 46 3.1 .00 19 64 37 925 25 18 9.0 8.4 10 8.4 40 3.3 .00 22 54 31 547

26 17 13 8.3 10 8.0 43 3.6 .00 16 33 26 398 27 16 15 8.4 9.5 7.7 39 4.2 .00 11 38 22 324 28 15 15 9.7 9.2 7.4 32 4.7 .00 19 36 18 269 29 15 13 14 9.2 --- 30 3.9 .00 44 35 15 227 30 14 12 15 9.5 --- 45 3.3 .00 42 61 12 191 31 13 --- 14 11 --- 53 --- .00 --- 180 10 ---

MEAN 37.8 8.96 9.22 10.2 11.8 30.0 12.1 .47 7.10 40.1 259 395 MAX 82 15 15 13 17 90 49 2.7 44 180 779 1510 MIN 13 5.7 7.9 9.2 7.4 7.2 3.1 .00 .00 12 10 9.5 IN. .08 .02 .02 .02 .02 .06 .02 .00 .01 .08 .52 .77

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1932 - 2001, BY WATER YEAR (WY)

MEAN 525 188 251 366 607 645 431 180 256 325 607 704 MAX 3043 1788 1801 1607 4161 3303 1927 1716 3646 1459 2137 4033 (WY) 1993 1948 1954 1970 1998 1959 1973 1959 1934 1946 1978 1964 MIN 4.00 2.98 4.00 5.12 5.44 13.7 6.41 .47 3.58 9.05 9.86 10.3 (WY) 1932 1932 1932 1932 1932 2000 1935 2001 1935 1981 1954 1990

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1932 - 2001

ANNUAL MEAN 34.3 68.6 423 HIGHEST ANNUAL MEAN 1163 1948 LOWEST ANNUAL MEAN 33.2 2000 HIGHEST DAILY MEAN 280 Sep 13 1510 Sep 19 19000 Sep 13 1964 LOWEST DAILY MEAN .00 May 20 .00 May 17 .00 May 20 2000 ANNUAL SEVEN-DAY MINIMUM .00 May 30 .00 May 17 .00 May 30 2000 MAXIMUM PEAK FLOW 1560 Sep 19 20000 Sep 13 1964 MAXIMUM PEAK STAGE 16.04 Sep 19 28.40 Sep 13 1964 INSTANTANEOUS LOW FLOW .00 May 17 .00 May 19 2000 ANNUAL RUNOFF (INCHES) .81 1.62 9.99 10 PERCENT EXCEEDS 98 91 1110 50 PERCENT EXCEEDS 14 12 135 90 PERCENT EXCEEDS .27 .20 1671 SUWANNEE RIVER BASIN

02321500 SANTA FE RIVER AT WORTHINGTON SPRINGS, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 9.03 7.61 7.60 7.73 7.77 7.51 8.60 7.22 6.24 8.32 13.16 7.51 2 8.89 7.58 7.57 7.70 7.85 7.51 8.43 7.19 6.21 8.12 14.24 7.54 3 8.76 7.56 7.55 7.67 7.85 7.50 8.27 7.16 6.18 8.01 13.79 7.88 4 8.64 7.54 7.52 7.65 7.87 7.69 8.15 7.13 6.14 8.08 12.88 8.66 5 8.54 7.53 7.50 7.63 7.89 7.96 8.06 7.11 6.11 8.25 12.24 9.02

6 8.47 7.51 7.49 7.63 7.88 8.00 7.99 7.08 6.12 8.26 12.79 9.10 7 8.50 7.50 7.49 7.62 7.84 7.90 7.91 7.06 6.08 8.14 12.72 8.86 8 8.58 7.49 7.50 7.62 7.80 7.80 7.85 7.07 6.05 7.92 13.12 8.80 9 8.65 7.47 7.50 7.61 7.77 7.72 7.79 7.04 6.01 7.94 13.48 8.87 10 8.55 7.48 7.50 7.59 7.73 7.70 7.73 7.01 6.00 7.84 13.40 8.75

11 8.43 7.45 7.51 7.59 7.71 7.67 7.68 6.99 5.98 8.52 13.01 8.77 12 8.37 7.44 7.53 7.60 7.70 7.67 7.62 6.99 6.00 8.79 12.46 8.65 13 8.30 7.43 7.53 7.61 7.69 7.66 7.58 6.99 6.03 8.72 11.70 8.58 14 8.22 7.44 7.54 7.63 7.67 7.65 7.53 6.96 6.01 8.47 10.90 8.82 15 8.15 7.42 7.53 7.62 7.66 7.66 7.50 6.94 6.49 8.20 11.36 10.80

16 8.08 7.42 7.53 7.62 7.66 7.85 7.50 6.93 7.04 8.00 11.49 12.19 17 8.02 7.42 7.54 7.62 7.65 8.20 7.45 6.89 7.03 7.84 10.62 13.00 18 7.97 7.41 7.53 7.62 7.62 8.21 7.40 6.85 7.02 7.73 9.73 14.87 19 7.92 7.39 7.57 7.61 7.61 8.41 7.36 6.80 7.09 7.71 9.19 15.94 20 7.88 7.39 7.56 7.64 7.60 9.05 7.33 6.75 7.30 7.98 8.90 15.84

21 7.84 7.38 7.55 7.65 7.59 9.40 7.31 6.71 7.42 8.91 8.64 15.22 22 7.81 7.37 7.55 7.67 7.58 9.19 7.29 6.66 7.71 8.99 8.44 14.51 23 7.80 7.38 7.54 7.67 7.57 8.87 7.27 6.61 7.84 8.67 8.30 15.01 24 7.78 7.38 7.55 7.66 7.56 8.56 7.25 6.55 7.93 8.93 8.18 14.64 25 7.77 7.51 7.54 7.64 7.56 8.42 7.27 6.51 8.01 8.72 8.07 13.36

26 7.76 7.66 7.54 7.62 7.54 8.49 7.29 6.46 7.84 8.27 7.97 12.50 27 7.73 7.73 7.55 7.60 7.52 8.40 7.33 6.42 7.68 8.38 7.88 11.93 28 7.70 7.72 7.60 7.59 7.51 8.26 7.36 6.37 7.90 8.33 7.78 11.44 29 7.68 7.68 7.78 7.59 --- 8.22 7.31 6.34 8.50 8.33 7.69 11.03 30 7.66 7.64 7.81 7.60 --- 8.54 7.26 6.32 8.46 8.89 7.61 10.65 31 7.63 --- 7.77 7.65 --- 8.72 --- 6.28 --- 10.41 7.55 ---

TOTAL 253.11 224.93 234.37 236.55 215.25 252.39 228.67 211.39 206.42 259.67 329.29 332.74 MEAN 8.16 7.50 7.56 7.63 7.69 8.14 7.62 6.82 6.88 8.38 10.62 11.09 MAX 9.03 7.73 7.81 7.73 7.89 9.40 8.60 7.22 8.50 10.41 14.24 15.94 MIN 7.63 7.37 7.49 7.59 7.51 7.50 7.25 6.28 5.98 7.71 7.55 7.51

WTR YR 2001 TOTAL 2984.78 MEAN 8.18 MAX 15.94 MIN 5.9872 SUWANNEE RIVER BASIN

02321975 SANTA FE RIVER AT US HWY 441 NEAR HIGH SPRINGS, FL

LOCATION.--Lat 29 ° 51'09", long 82 ° 36'31", in NW 1 ⁄ 4 sec. 27, T. 7 S., R. 17 E., Columbia County, Hydrologic Unit 03110206, at highway bridge on U.S. 441, 1.9 mi northwest of the intersection of U.S. 441 and U.S. 27, and 28.1 mi upstream from mouth.

DRAINAGE AREA.--859 mi 2

.
PERIOD OF RECORD.--October 1992 to current year.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (Florida Department of Transportation bench mark). Prior to Mar. 17, 1998, nonrecording gage at same site and datum.

REMARKS.--Records poor.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 e145 e69 52 41 33 e14 e41 e14 3.1 3.9 47 75 2 143 e68 51 41 e30 e14 e40 e14 3.3 4.1 68 74 3 e140 e67 50 42 e29 e14 e37 e14 2.7 3.5 102 72 4 e138 e66 50 42 e28 e15 e35 e14 2.2 3.6 122 73 5 135 e65 50 42 e27 e15 e33 e14 1.9 3.7 120 74

6 e132 e64 50 41 e26 e15 e31 e13 1.9 3.5 118 77 7 e130 e63 49 41 e25 e16 e30 e13 1.8 3.1 118 81 8 e128 e62 49 41 e24 e17 e29 e13 1.7 3.1 124 81 9 125 61 48 38 e23 e18 e27 e13 1.7 3.2 132 80 10 e124 61 48 39 e22 e20 e27 13 1.8 4.1 142 80

11 e123 60 48 40 e21 e21 e26 13 1.9 4.2 148 80 12 e121 59 47 40 e21 e23 e25 13 2.4 4.3 150 82 13 e120 59 47 39 e20 e25 e24 12 2.1 5.6 148 81 14 119 58 47 38 e19 e30 e23 12 1.8 8.1 143 87 15 e115 58 47 38 e18 e35 e22 11 1.6 7.7 136 87

16 e110 58 48 39 e17 e40 e21 11 1.7 7.9 134 96 17 e105 56 46 38 e17 e50 e20 9.3 1.6 8.2 136 118 18 e100 55 46 38 e17 e57 e19 8.0 1.4 11 133 145 19 96 57 46 38 e16 e65 e18 7.3 1.4 11 125 186 20 e94 54 44 36 e16 e72 e17 6.7 1.5 11 116 233

21 e92 53 44 35 e16 e80 e17 5.5 1.4 14 108 263 22 e89 54 43 36 e15 e75 e16 5.2 2.4 16 103 262 23 e87 54 43 36 e15 e73 e16 4.9 4.5 18 99 249 24 e86 55 43 35 e15 e68 e16 4.2 4.1 20 95 263 25 85 56 43 34 e15 e65 e15 4.3 3.3 25 90 266

26 e82 53 43 34 e14 e60 e15 4.2 3.0 29 86 243 27 e80 53 44 35 e14 e56 e15 3.7 3.2 32 83 223 28 e77 53 46 34 e14 e53 e15 3.1 3.4 38 80 206 29 e75 53 43 35 --- e50 e14 2.8 3.4 37 78 190 30 72 53 42 35 --- e47 e14 3.1 3.7 39 76 175 31 70 --- 41 34 --- e45 --- 3.2 --- 38 75 ---

MEAN 108 58.6 46.4 37.9 20.2 40.3 23.3 9.11 2.40 13.6 111 143 MAX 145 69 52 42 33 80 41 14 4.5 39 150 266 MIN 70 53 41 34 14 14 14 2.8 1.4 3.1 47 72 IN. .14 .08 .06 .05 .02 .05 .03 .01 .00 .02 .15 .19

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1993 - 2001, BY WATER YEAR (WY)

MEAN 1087 434 433 556 961 898 589 412 335 395 485 418 MAX 3505 1006 934 1075 4110 3531 1226 1172 852 745 877 828 (WY) 1993 1993 1998 1998 1998 1998 1993 1997 1997 1996 1997 1995 MIN 108 58.6 46.4 37.9 20.2 40.3 23.3 9.11 2.40 13.6 111 143 (WY) 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1993 - 2001

ANNUAL MEAN 104 51.3 582 HIGHEST ANNUAL MEAN 1219 1998 LOWEST ANNUAL MEAN 51.3 2001 HIGHEST DAILY MEAN 320 Sep 17 266 Sep 25 9150 Feb 25 1998 LOWEST DAILY MEAN 41 Dec 31 1.4 Jun 18 1.4 Jun 18 2001 ANNUAL SEVEN-DAY MINIMUM 43 Dec 25 1.5 Jun 15 1.5 Jun 15 2001 MAXIMUM PEAK FLOW 274 Sep 25 10100 Oct 6 1992 MAXIMUM PEAK STAGE 32.66 Sep 25 45.23 Oct 6 1992 INSTANTANEOUS LOW FLOW 1.1 Jun 19 1.1 Jun 19 2001 ANNUAL RUNOFF (INCHES) 1.65 .81 9.21 10 PERCENT EXCEEDS 149 122 1120 50 PERCENT EXCEEDS 102 39 406 90 PERCENT EXCEEDS 50 3.6 72

e Estimated73 SUWANNEE RIVER BASIN

02322500 SANTA FE RIVER NEAR FORT WHITE, FL

LOCATION.--Lat 29 ° 50'55", long 82 ° 42'55", in SE 1 ⁄ 4 sec. 28, T. 7 S., R. 16 E., Gilchrist County, Hydrologic Unit 03110206, on left bank 2.1 mi upstream from bridge on State Highway 47, 5.1 mi south of Fort White, and 18 mi upstream from mouth.

DRAINAGE AREA.--1,017 mi 2

.
PERIOD OF RECORD.--October 1927 to January 1930, June 1932 to current year.

REVISED RECORDS.--WDR FL-75-1: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 20.86 ft above National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to June 3, 1932, nonrecording gage at several sites within 200 ft of present site at various datums. Oct. 1, 1947 to Feb. 10, 1949, auxiliary nonrecording gage and since Feb. 11, 1949, auxiliary water-stage recorder at bridge on U.S. Highway 129, 16 mi downstream from base gage at datum 3.5 ft above National Geodetic Vertical Datum of 1929.

REMARKS.--Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 1040 764 582 515 e470 488 578 557 542 587 703 617 2 1030 759 583 519 e468 494 575 557 544 584 733 615 3 1020 742 580 522 e470 496 581 554 e546 581 794 614 4 1010 740 572 525 e478 508 581 553 548 584 875 612 5 1000 734 568 514 e490 504 580 557 550 581 917 606

6 998 729 566 516 504 504 579 556 552 580 933 597 7 997 725 563 512 483 504 572 555 552 576 960 618 8 983 720 562 512 472 504 567 555 552 e574 985 649 9 938 708 559 502 472 504 566 552 552 e570 1020 641 10 925 708 551 496 472 510 565 551 552 572 1060 627

11 917 708 550 500 472 512 566 551 552 589 1100 639 12 912 708 550 508 472 508 564 552 558 587 1130 642 13 901 701 543 509 472 510 561 551 556 581 1150 636 14 895 700 531 503 477 508 562 548 552 577 1130 655 15 889 696 531 499 480 509 562 547 552 568 1100 676

16 883 691 530 497 480 e520 563 544 552 566 1060 669 17 871 688 526 496 480 e530 556 546 552 567 1030 700 18 864 683 517 490 480 536 554 544 552 584 990 745 19 861 683 519 489 480 563 558 541 552 592 936 812 20 855 647 522 496 480 616 557 541 552 608 868 962

21 841 643 523 488 480 590 557 540 552 641 810 1100 22 836 636 527 485 485 572 553 539 576 630 741 e1180 23 830 633 525 483 488 564 552 537 665 636 687 1170 24 819 634 529 481 488 556 552 535 628 656 666 e1200 25 810 647 532 480 488 559 562 535 573 663 656 1230

26 806 628 534 479 488 571 561 533 564 665 642 1200 27 798 613 532 472 488 577 563 528 561 666 631 1160 28 787 613 543 472 488 576 560 525 560 686 626 1110 29 780 608 538 470 --- 586 558 525 560 679 619 1070 30 776 597 529 477 --- 591 557 542 560 680 612 1030 31 776 --- 521 473 --- 584 --- 544 --- 694 612 ---

MEAN 892 683 543 496 480 537 564 545 561 610 864 826 MAX 1040 764 583 525 504 616 581 557 665 694 1150 1230 MIN 776 597 517 470 468 488 552 525 542 566 612 597 IN. 1.01 .75 .62 .56 .49 .61 .62 .62 .62 .69 .98 .91

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1928 - 2001, BY WATER YEAR (WY)

MEAN 1792 1391 1282 1401 1598 1807 1717 1405 1315 1387 1678 1916 MAX 4357 3840 2778 3415 4810 5345 4668 3409 4063 2728 3545 6344 (WY) 1993 1948 1965 1942 1998 1948 1948 1959 1959 1972 1928 1964 MIN 730 683 543 496 480 537 564 545 561 610 773 756 (WY) 1956 2001 2001 2001 2001 2001 2001 2001 2001 2001 2000 1955

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1928 - 2001

ANNUAL MEAN 709 634 1556 HIGHEST ANNUAL MEAN 3112 1948 LOWEST ANNUAL MEAN 634 2001 HIGHEST DAILY MEAN 1110 Sep 18 1230 Sep 25 16900 Sep 16 1964 LOWEST DAILY MEAN 517 Dec 18 e468 Feb 2 e468 Feb 2 2001 ANNUAL SEVEN-DAY MINIMUM 523 Dec 17 471 Jan 28 471 Jan 28 2001 MAXIMUM PEAK FLOW 1240 Sep 25 17000 Sep 16 1964 MAXIMUM PEAK STAGE 1.26 Sep 25 15.34 Sep 16 1964 INSTANTANEOUS LOW FLOW 464 Jan 27 464 Jan 27 2001 ANNUAL RUNOFF (INCHES) 9.49 8.47 20.79 10 PERCENT EXCEEDS 875 917 2580 50 PERCENT EXCEEDS 682 565 1280 90 PERCENT EXCEEDS 598 488 853

e Estimated74 SUWANNEE RIVER BASIN

02322800 SANTA FE RIVER NEAR HILDRETH, FL

LOCATION.--Lat 29 ° 54'41", long 82 ° 51'38", in NE sec. 1, T. 7 S., R. 14 E., Gilchrist County, Hydrologic Unit 03110206, near left bank on downstream side of bridge of U.S. Highway 129 and State Highway 49, 1.7 mi upstream from mouth, and 8.6 mi west of Fort White.

DRAINAGE AREA.--1,376 mi 2 , approximately.

PERIOD OF RECORD.--October 1947 to October 2000 (gage heights only), November 2000 to September 2001. Published as "near Fort White (auxiliary)" prior to September 1965.

GAGE.--Water-stage and water-current meter recorders. Datum of gage is 3.5 ft above National Geodetic Vertical Datum of 1929. Prior to Feb. 11, 1949, nonrecording gage at same sites and datum. Since October 1947 used as auxiliary gage for Santa Fe River near Fort White (station 02322500).

REMARKS.--Records fair.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 --- e1310 1130 1050 915 997 672 978 1010 911 1050 1170 2 --- e1290 1160 1030 928 1010 670 957 1030 922 1050 1140 3 --- e1280 1140 1040 924 994 717 962 1020 916 1060 1170 4 --- e1270 1150 1020 912 1010 713 973 1010 912 1110 1170 5 --- e1270 1130 1000 935 1030 711 978 988 902 1160 1150

6 --- e1260 1130 978 925 1010 704 976 999 869 1150 1150 7 --- e1250 1140 973 933 1010 705 984 1010 860 1180 1170 8 --- e1250 1130 988 919 996 728 982 1020 834 1170 1190 9 --- e1250 1140 979 931 971 747 1000 987 855 1160 1160 10 --- e1250 1140 978 949 948 761 996 1010 856 1170 1150

11 --- e1250 1150 990 947 945 796 1000 992 908 1140 1140 12 --- e1240 1140 991 943 924 804 995 1040 898 1200 1150 13 --- e1230 1130 973 957 927 824 986 997 926 1220 1140 14 --- e1220 1140 965 968 872 820 967 843 917 1220 1130 15 --- e1220 1120 988 972 868 850 991 717 901 1240 1170

16 --- e1220 1120 973 972 909 830 949 694 919 1220 1170 17 --- e1220 1130 972 984 870 875 1010 696 948 1250 1170 18 --- e1210 1130 974 967 848 870 994 762 949 1240 1190 19 --- e1210 1130 962 963 829 884 997 792 996 1250 1200 20 --- e1200 1100 1010 977 834 889 987 785 998 1250 1270

21 --- 1200 1090 977 971 769 877 992 802 1010 1240 1320 22 --- 1190 1100 975 985 728 882 1000 812 1020 1240 1380 23 --- 1180 1110 979 970 684 899 1000 878 1040 1210 1380 24 --- 1190 1080 977 966 620 936 995 875 1010 1220 1390 25 --- 1170 1100 979 982 593 934 1000 872 1060 1220 1420

26 --- 1170 1080 954 997 623 934 985 862 1060 1180 1400 27 --- 1190 1090 970 992 614 943 997 887 1050 1200 1400 28 --- 1170 1090 958 1000 589 946 983 878 1050 1200 1390 29 --- 1160 1090 919 --- 610 958 992 904 1050 1190 1360 30 --- 1140 1100 937 --- 660 955 1020 914 1010 1180 1400 31 --- --- 1070 923 --- 654 --- 1030 --- 1060 1180 ---

TOTAL --- 36660 34680 30382 26784 25946 24834 30656 27086 29617 36750 37190 MEAN --- 1222 1119 980 957 837 828 989 903 955 1185 1240 MAX --- 1310 1160 1050 1000 1030 958 1030 1040 1060 1250 1420 MIN --- 1140 1070 919 912 589 670 949 694 834 1050 1130 AC-FT --- 72720 68790 60260 53130 51460 49260 60810 53730 58750 72890 73770 CFSM --- .89 .81 .71 .70 .61 .60 .72 .66 .70 .86 .90 IN. --- .99 .94 .82 .73 .70 .67 .83 .73 .80 .99 1.01

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 2000 - 2001, BY WATER YEAR (WY)

MEAN --- 1222 1119 980 957 837 828 989 903 955 1185 1240 MAX --- 1222 1119 980 957 837 828 989 903 955 1185 1240 (WY) --- 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 MIN --- 1222 1119 980 957 837 828 989 903 955 1185 1240 (WY) --- 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001 2001

SUMMARY STATISTICS WATER YEARS 2000 - 2001

HIGHEST DAILY MEAN 1420 Sep 25 2001 LOWEST DAILY MEAN 589 Mar 28 2001 ANNUAL SEVEN-DAY MINIMUM 616 Mar 24 2001 MAXIMUM PEAK FLOW 1510 Sep 25 2001 MAXIMUM PEAK STAGE 10.69 Mar 31 2001 (water year) MAXIMUM PEAK STAGE 30.69 Apr 12 1948 (period of record) INSTANTANEOUS LOW FLOW 54 Jul 30 2001 10 PERCENT EXCEEDS 1220 50 PERCENT EXCEEDS 997 90 PERCENT EXCEEDS 826

e Estimated75 SUWANNEE RIVER BASIN

02323000 SUWANNEE RIVER NEAR BELL, FL

LOCATION.--Lat 29 ° 47'28", long 82 ° 55'28", in NW 1 ⁄ 4 sec. 16, T. 8 S., R. 14 E., Gilchrist County, Hydrologic Unit 03110205, on downstream side of bridge on State Road 340, 4.5 mi northwest of Bell, 10.4 mi downstream from Santa Fe River, and 55 mi ups tream from mouth.

DRAINAGE AREA.--9,390 mi 2 , approximately, includes part of watershed in Okefenokee Swamp which is indeterminate.

PERIOD OF RECORD.--June 1932 to November 1965, November 1975 to October 1977 (annual maximum elevation), November 1996 to January 1999 (gage-heights only), October 2000 to September 2001.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (levels by Suwannee River Water Management District). June 1, 1932 to Nov. 16, 1956, water-stage recorder at site .4 mi downstream at datum 3.60 ft higher, Nov. 18, 1975 to Oct. 10, 1977, nonrecording gage at present site at datum 3.60 ft higher, Nov. 1, 1996 to Jan. 31, 1999 and since Aug. 3, 2000, water-stage recorder at present site and datum.

REMARKS.--Records fair, except for estimated daily discharges, which are poor.

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Aug. 28, 1928, reached a stage of 25.9 ft, from floodmarks; discharge, 74,000 ft 3 /s.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 7100 e3830 e3490 3500 4610 3670 11600 5840 3330 e6230 5590 4440 2 7150 e3790 e3590 3720 4580 3660 11500 5680 3400 e6010 5660 4410 3 7130 e3770 e3680 3880 4580 3700 11500 5520 3350 e5820 5830 4350 4 7050 e3740 e3560 4070 4620 3870 11500 5330 3280 e5780 6000 4350 5 6840 e3710 e3480 4270 4660 3740 11500 5170 3250 e5770 6110 4290

6 e6630 e3700 3400 4520 4650 3480 11400 5070 3230 e5810 6110 4260 7 e6510 e3720 3410 4640 4650 3460 11500 4950 3230 e5960 5990 4250 8 e6400 3730 3450 4840 4620 3600 11500 4780 3180 e6150 6060 4280 9 e6260 3810 3490 4870 4600 3850 11400 4680 3120 e6310 6350 4280 10 e6010 3830 3490 4700 4580 4090 11400 4640 3110 e6320 6610 4250

11 e5800 3580 3430 4690 4490 4250 11200 4550 3160 e6300 6720 4180 12 e5580 3510 3450 4720 4380 4600 11000 4440 3380 e6390 6690 4190 13 e5440 3540 3350 4570 4310 5060 10900 4340 3450 e6460 6600 4160 14 e5320 3610 3390 4490 4250 5280 10600 4190 4460 e6500 6490 4070 15 e5250 3380 3320 4460 4190 5430 10400 4090 6030 e6470 6450 3980

16 e5130 3340 3290 4430 4150 e5640 10100 4030 e7940 e6180 6340 4040 17 e5020 3490 3460 4410 4120 e5800 9780 3960 e8460 e5900 6170 4160 18 e4930 3320 3160 4380 3970 e6030 9380 3870 e8360 e5740 6040 4190 19 e4840 3270 3180 4410 3910 e6500 9020 3810 e8080 e5660 5940 4210 20 e4780 3230 3210 4470 3990 e6940 8720 3790 e7700 e5640 5830 4200

21 e4720 3110 3230 4200 4010 e7750 8480 3790 e7410 e5630 5690 4220 22 e4640 3070 3330 4100 4010 e8570 8200 3780 e7260 e5600 5530 4170 23 e4530 3180 3260 4040 3970 e8880 7930 3720 e7220 e5520 5410 4120 24 e4410 3310 3230 4020 3830 9330 7690 3610 e7100 e5500 5280 4100 25 e4320 3630 3240 4060 3850 9980 7450 3590 e7030 e5510 5130 4090

26 e4220 3550 3220 4020 3820 10500 7140 3560 e6970 5480 4980 3990 27 e4120 3310 3340 4110 3720 10800 6790 3480 e6860 5510 4840 3990 28 e4070 e3270 3550 4210 3680 11000 6550 3450 e6610 5530 4730 4040 29 e3990 e3310 3560 4310 --- 11300 6330 3450 e6500 5590 4590 3980 30 e3950 e3390 3350 4520 --- 11500 6060 3410 e6380 5580 4500 3810 31 e3890 --- 3330 4600 --- 11600 --- 3310 --- 5600 4450 ---

TOTAL 166030 105030 104920 134230 118800 203860 288520 131880 162840 182450 178710 125050 MEAN 5356 3501 3385 4330 4243 6576 9617 4254 5428 5885 5765 4168 MAX 7150 3830 3680 4870 4660 11600 11600 5840 8460 6500 6720 4440 MIN 3890 3070 3160 3500 3680 3460 6060 3310 3110 5480 4450 3810 MED 5130 3520 3390 4410 4220 5640 10200 4030 6200 5780 5940 4180 AC-FT 329300 208300 208100 266200 235600 404400 572300 261600 323000 361900 354500 248000 CFSM .57 .37 .36 .46 .45 .70 1.02 .45 .58 .63 .61 .44 IN. .66 .42 .42 .53 .47 .81 1.14 .52 .65 .72 .71 .50

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1932 - 2001, BY WATER YEAR (WY)

MEAN 8404 7326 6805 8014 8668 10860 12440 8282 6144 6406 8169 8632 MAX 18550 34280 32940 26750 21170 33390 59430 20050 10740 10400 22260 19960 (WY) 1948 1948 1948 1948 1948 1948 1948 1948 1948 1946 1945 1945 MIN 3550 2950 2667 2648 3732 3544 3882 3437 3106 2937 2870 3348 (WY) 1955 1956 1956 1956 1934 1955 1955 1955 1955 1955 1955 1956

SUMMARY STATISTICS FOR 2001 WATER YEAR WATER YEARS 1932 - 2001

ANNUAL TOTAL 1902320 ANNUAL MEAN 5212 8382 HIGHEST ANNUAL MEAN 24140 1948 LOWEST ANNUAL MEAN 3390 1955 HIGHEST DAILY MEAN 11600 Mar 31 82300 Apr 13 1948 LOWEST DAILY MEAN 3070 Nov 22 2490 Jan 11 1956 ANNUAL SEVEN-DAY MINIMUM 3180 Jun 5 2520 Jan 8 1956 MAXIMUM PEAK FLOW 11600 Mar 30 82300 Apr 13 1948 MAXIMUM PEAK STAGE 12.10 Apr 1 27.43 Apr 13 1948 INSTANTANEOUS LOW FLOW 3020 Nov 22 2460 Jan 10 1956 ANNUAL RUNOFF (AC-FT) 3773000 6073000 ANNUAL RUNOFF (CFSM) .56 .89 ANNUAL RUNOFF (INCHES) 7.54 12.13 10 PERCENT EXCEEDS 7930 15200 50 PERCENT EXCEEDS 4490 6520 90 PERCENT EXCEEDS 3350 3680

e Estimated76 SUWANNEE RIVER BASIN

02323500 SUWANNEE RIVER NEAR WILCOX, FL

LOCATION.--Lat 29 ° 35'22", long 82 ° 56'12", in NW 1 ⁄ 4 sec.29, T. 10 S., R. 14 E., Levy County, Hydrologic Unit 03110205, on left bank about 400 ft downstream from Fort Fannin Bridge on U.S. Highway 19, 2.0 mi southwest of Wilcox, and 33 mi upstream from mouth.

DRAINAGE AREA.--9,640 mi 2 , approximately, includes part of watershed in Okefenokee Swamp which is indeterminate.

PERIOD OF RECORD.--October 1930 to September 1931, October 1941 to current year. Monthly discharge only for some periods, published in WSP 1304.

REVISED RECORDS.--WSP 1905: WDR FL-75-1: Drainage area. WDR FL-97-4: 1996.

GAGE.--Water-stage and water-current meter recorders. Datum of gage is 0.53 ft below National Geodetic Vertical Datum of 1929. Prior to July 4, 1931, nonrecording gage at site 400 ft upstream at present datum. July 4 to Sept. 30, 1931, and Mar. 26 to May 14, 1942, water-stage recorder, and May 15, 1942 to Jan. 24, 1951, nonrecording gage at present site and datum. Feb. 1, 1951, to Dec. 9, 1999, auxiliary water-stage recorder about 9.0 mi downstream from base gage. Datum of auxiliary gage is 2.9 9 ft below National Geodetic Vertical Datum of 1929. Water-current meter since Dec. 9, 1999.

REMARKS.--No estimated daily discharges. Records poor. Flow generally affected by tide when discharge is less than 17,500 ft 3 /s.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 7230 3680 3570 3530 5140 3960 12200 6280 3270 6270 5270 3920 2 7060 3710 3800 4160 5330 3710 11900 5980 3390 6000 5190 4010 3 7150 3950 4240 4170 5050 3390 11800 5880 3690 5720 5200 4000 4 7190 3820 4020 4460 5050 4090 11900 5800 3240 5740 5440 4080 5 6840 3780 3640 4020 5160 4890 11800 5470 3500 5780 5550 3870

6 6700 3420 3370 4790 4800 4760 11800 5340 3350 5890 5690 4020 7 6870 3430 3550 4490 4790 4280 11800 5470 3250 6210 5730 3890 8 6790 3280 3410 4700 4610 3880 11800 5320 3600 6370 5750 4110 9 6770 3090 3390 5660 4470 3660 11700 4960 3400 6610 5980 4140 10 6170 4080 3530 5030 4650 4430 11600 4860 3300 6630 6170 4300

11 5880 3630 3530 4550 4980 4330 11600 4860 2860 6590 6310 4200 12 5740 3360 3550 4910 4770 4300 11400 4880 3110 6530 6290 4140 13 5660 3090 3290 5150 4550 4980 11200 5040 3820 6620 6190 4330 14 5380 3660 3240 4720 4520 5550 11100 4970 4620 6740 5930 4920 15 5420 3750 3310 4570 4440 5420 11000 4330 6180 6400 5650 4750

16 5280 3030 2850 4690 4270 6310 10900 4310 7590 6200 5710 3840 17 5190 3610 4050 4530 4830 7080 10500 4410 8110 5820 5540 3810 18 5110 3940 3460 4510 4740 6920 10300 4320 8030 5650 5390 3790 19 4990 3290 3580 4050 4070 7100 9470 4180 7890 5700 5300 3770 20 4920 3930 3950 5270 4050 7170 8990 3900 7630 5730 5260 3900

21 4720 3800 3070 4950 4150 8240 8790 3840 7400 5730 5240 4030 22 4600 3180 3850 4600 4070 8600 8530 3840 7370 5470 5110 4270 23 4810 2970 3850 4910 4480 8970 8200 3980 7380 4870 4990 4230 24 4750 2870 3800 4280 4040 9260 7830 3790 7590 5220 5040 4110 25 4280 3150 3760 4740 3820 10000 7790 3740 7110 5380 4950 4670

26 4190 3660 3610 4180 4190 10700 7810 4070 6990 5110 4670 4500 27 4150 3540 3060 4180 4020 11100 7180 3790 6920 5280 4400 4190 28 3960 3530 3170 4360 3940 11100 6910 3720 6740 5380 4440 4140 29 3940 3570 4650 4310 --- 11300 6830 3570 6560 5350 4180 4690 30 4160 3730 4120 4490 --- 11700 6570 3890 6440 5290 3960 4570 31 3880 --- 3840 4930 --- 12000 --- 3820 --- 5330 3810 ---

TOTAL 169780 105530 112110 141890 126980 213180 301200 142610 164330 181610 164330 125190 MEAN 5477 3518 3616 4577 4535 6877 10040 4600 5478 5858 5301 4173 MAX 7230 4080 4650 5660 5330 12000 12200 6280 8110 6740 6310 4920 MIN 3880 2870 2850 3530 3820 3390 6570 3570 2860 4870 3810 3770 IN. .66 .41 .43 .55 .49 .82 1.16 .55 .63 .70 .63 .48

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1931 - 2001, BY WATER YEAR (WY)

MEAN 8662 7562 7919 9942 12580 15380 15580 10970 8384 8154 8994 9050 MAX 25810 33030 32630 27320 27450 40960 57260 28690 21690 17550 22190 27910 (WY) 1965 1948 1948 1948 1998 1998 1948 1973 1959 1973 1991 1964 MIN 3553 3428 3177 3058 3400 3638 4631 3265 2462 2421 2610 3587 (WY) 2000 2000 2000 2000 2000 2000 1956 2000 2000 2000 2000 1999

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1931 - 2001

ANNUAL TOTAL 1322500 1948740 ANNUAL MEAN 3613 5339 10250 HIGHEST ANNUAL MEAN 24560 1948 LOWEST ANNUAL MEAN 3406 2000 HIGHEST DAILY MEAN 7230 Oct 1 12200 Apr 1 84700 Apr 14 1948 LOWEST DAILY MEAN 1970 Jul 16 2850 Dec 16 1970 Jul 16 2000 ANNUAL SEVEN-DAY MINIMUM 2220 Jul 10 3270 Jun 6 2220 Jul 10 2000 MAXIMUM PEAK FLOW 12200 Apr 1 84700 Apr 14 1948 MAXIMUM PEAK STAGE 5.92 Mar 29 22.32 Apr 14 1948 ANNUAL RUNOFF (INCHES) 5.10 7.52 14.44 10 PERCENT EXCEEDS 5440 7950 18400 50 PERCENT EXCEEDS 3380 4720 8120 90 PERCENT EXCEEDS 2440 3530 455077 SUWANNEE RIVER BASIN

02323500 SUWANNEE RIVER NEAR WILCOX, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 3.80 3.01 2.37 1.86 2.60 2.59 5.66 3.04 2.78 3.40 3.22 3.30 2 3.90 2.97 2.44 1.92 2.39 2.66 5.59 3.25 2.94 3.44 3.31 3.29 3 3.78 2.83 2.24 1.86 2.17 2.91 5.65 3.23 2.77 3.39 3.67 3.29 4 3.88 2.64 1.68 2.03 2.32 3.22 5.73 3.05 2.73 3.37 3.90 3.26 5 3.85 2.72 1.85 2.39 2.53 2.62 5.73 3.11 2.70 3.44 3.97 3.20

6 3.75 2.97 2.21 2.78 2.64 1.98 5.74 3.21 2.72 3.47 3.89 3.17 7 3.51 3.17 2.50 2.84 2.77 1.81 5.78 3.08 2.69 3.48 3.61 3.15 8 3.22 3.21 2.72 3.26 2.79 2.21 5.80 2.85 2.59 3.54 3.51 3.16 9 2.71 3.61 2.89 2.94 2.86 2.88 5.79 3.00 2.56 3.68 3.59 3.07 10 2.76 3.37 2.99 2.48 2.87 2.95 5.76 3.12 2.60 3.76 3.69 2.96

11 3.14 2.90 2.89 2.86 2.66 2.89 5.69 3.06 2.70 3.82 3.73 2.73 12 3.34 2.97 3.02 3.08 2.56 3.13 5.64 2.97 3.22 3.82 3.69 2.85 13 3.34 3.10 2.84 2.62 2.47 3.51 5.52 2.81 2.67 3.77 3.62 2.79 14 3.53 3.23 2.99 2.65 2.42 3.01 5.39 2.60 2.63 3.48 3.67 2.40 15 3.60 2.53 2.79 2.61 2.38 3.46 5.29 2.61 3.05 3.27 3.95 2.08

16 3.58 2.82 2.83 2.58 2.40 3.59 5.12 2.68 3.55 3.26 3.93 2.71 17 3.54 3.07 3.03 2.58 2.44 3.12 4.90 2.66 3.85 3.41 3.88 3.12 18 3.39 2.46 1.89 2.62 1.99 2.91 4.54 2.65 3.91 3.63 3.87 3.26 19 3.28 2.56 2.25 2.95 1.93 2.99 4.41 2.72 3.95 3.64 3.92 3.40 20 3.09 2.24 1.86 2.92 2.58 3.70 4.49 2.85 3.90 3.60 3.87 3.39

21 2.95 1.83 1.88 2.06 2.71 3.75 4.56 2.96 3.92 3.67 3.75 3.45 22 3.08 1.59 2.24 2.08 2.84 3.69 4.38 3.07 4.00 3.58 3.59 3.25 23 2.85 2.28 1.71 1.94 2.78 4.05 4.31 3.01 4.06 3.78 3.56 3.07 24 2.63 2.81 1.65 2.09 2.56 4.48 4.27 2.86 3.92 4.50 3.42 3.05 25 2.85 3.49 1.73 2.35 2.75 4.86 4.20 2.96 3.71 3.65 3.17 2.93

26 3.11 3.08 1.63 2.10 2.74 5.07 3.79 2.91 3.57 3.34 3.03 2.61 27 3.28 2.75 2.41 2.50 2.52 5.10 3.54 2.78 3.39 3.23 3.02 2.63 28 3.27 2.64 3.11 2.63 2.63 5.23 3.59 2.80 3.27 3.13 3.04 2.85 29 3.38 2.49 2.47 2.71 --- 5.58 3.45 2.87 3.35 3.05 2.96 2.62 30 3.19 2.49 2.00 3.02 --- 5.82 3.17 2.68 3.43 3.11 3.05 2.13 31 3.07 --- 1.66 2.79 --- 5.74 --- 2.53 --- 3.18 3.19 ---

TOTAL 102.65 83.83 72.77 78.10 71.30 111.51 147.48 89.98 97.13 108.89 110.27 89.17 MEAN 3.31 2.79 2.35 2.52 2.55 3.60 4.92 2.90 3.24 3.51 3.56 2.97 MAX 3.90 3.61 3.11 3.26 2.87 5.82 5.80 3.25 4.06 4.50 3.97 3.45 MIN 2.63 1.59 1.63 1.86 1.93 1.81 3.17 2.53 2.56 3.05 2.96 2.08

WTR YR 2001 TOTAL 1163.08 MEAN 3.19 MAX 5.82 MIN 1.5978 SUWANNEE RIVER BASIN

02323592 SUWANNEE RIVER ABOVE GOPHER RIVER NEAR SUWANNEE, FL

LOCATION.-- Lat 29 ° 20'19", long 83 ° 05'13", in NE 1 ⁄ 4 sec. 22, T. 13S., R. 12E., Dixie County, Hydrologic Unit 03110205, on right bank, 0.6 mi downstream of Flag Creek, 1.9 mi upstream of Gopher River, 4.8 mi upstream of the town of Suwannee, and 7.6 mi above the mouth.

DRAINAGE AREA.--9,912 mi 2

.

WATER-DISCHARGE RECORDS

PERIOD OF RECORD.-- June 1999 to current year.

GAGE.--Water-stage and water-current meter recorders. Datum of gage is 2.10 ft below National Geodetic Vertical Datum of 1929.

REMARKS.--Records fair. Flow affected by tide.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 7540 4360 3270 3220 4650 3030 11400 5020 3620 6030 6660 5130 2 7710 4520 3940 3820 4400 2180 11100 4960 3980 6450 e7100 5380 3 7910 4540 4510 3400 3570 635 10200 5930 4310 6330 e7700 5030 4 7510 3630 2980 3520 3420 3580 11200 5350 3850 5940 e8070 5510 5 7370 3810 2730 2230 4090 5280 11500 5350 3590 5620 e8470 5220

6 8180 3220 2900 4730 4030 3320 11000 4980 3450 6170 e8250 5920 7 7640 4510 3110 3750 4320 2870 10800 4960 3370 5980 e8040 5460 8 7690 3120 2990 4800 4610 2830 11000 4740 3660 6050 e8160 5630 9 7210 3280 3220 6710 4050 2900 10600 4130 3410 6250 e8420 5420 10 5260 5680 3920 4100 4250 4800 10600 4020 3230 7080 e8670 5890

11 6220 3980 3450 4270 3910 3570 10100 4560 2440 6550 e8810 5290 12 6540 3810 4100 5190 3470 3020 10700 4460 2480 6570 e8570 5330 13 6280 3560 3160 4010 3600 4650 10300 4500 4290 6930 e8010 5850 14 5980 5360 3710 4250 3570 5000 10300 4770 4100 7310 e7680 6470 15 6170 3920 3980 4010 3310 3480 9890 3480 5410 6120 e8230 4380

16 6100 2950 1450 3810 2410 5970 10600 3860 6650 6240 e7840 4300 17 6040 4210 5610 3680 3970 6730 9800 4100 7570 6140 e7630 5020 18 5860 3770 2440 3270 3680 6180 8800 4060 7830 6580 e7600 5050 19 5660 2800 3490 2210 1950 5970 7740 4090 7620 6680 e7760 5540 20 5650 4190 3120 6810 3270 6160 7870 3900 7070 6250 e7530 5230

21 4950 4190 2280 3490 3300 8260 8390 3980 7070 6980 e7530 5800 22 5300 1980 4800 4520 3090 7590 8550 3760 6990 5400 6180 5980 23 5980 2850 3160 3870 4190 7950 7630 3740 7270 1820 6110 5570 24 4400 1730 3220 3150 2790 8430 7130 3520 7530 10000 6360 5480 25 4020 4860 3980 4830 3070 9520 7010 3260 7070 7280 6090 6790

26 4140 4760 2130 3420 3460 10100 7100 3290 7090 6280 5850 5460 27 4660 4040 2430 3330 3110 10400 6260 3350 6930 6310 5390 5040 28 4600 3920 2830 3770 2660 10200 5770 3260 6550 5960 6170 5600 29 5100 3720 5630 2960 --- 9180 6470 3140 6200 6110 5530 6750 30 4820 3990 3940 3760 --- 11800 5830 3960 6850 6040 5250 4200 31 4770 --- 3030 3940 --- 12000 --- 2970 --- 6630 4930 ---

MEAN 6041 3842 3404 3962 3579 6051 9188 4176 5383 6325 7245 5457 MAX 8180 5680 5630 6810 4650 12000 11500 5930 7830 10000 8810 6790 MIN 4020 1730 1450 2210 1950 635 5770 2970 2440 1820 4930 4200

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 5285 3906 3676 4090 4044 5366 7504 4239 4375 4979 5405 5482 MAX 6041 3970 3948 4218 4494 6051 9188 4302 5383 6325 7245 6564 (WY) 2001 2000 2000 2000 2000 2001 2001 2000 2001 2001 2001 2000 MIN 4530 3842 3404 3962 3579 4682 5820 4176 3368 3841 3885 4425 (WY) 2000 2001 2001 2001 2001 2000 2000 2001 2000 2000 2000 1999

SUMMARY STATISTICS FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 5396 4929 HIGHEST ANNUAL MEAN 5396 2001 LOWEST ANNUAL MEAN 4463 2000 HIGHEST DAILY MEAN 12000 Mar 31 12000 Mar 31 2001 LOWEST DAILY MEAN 635 Mar 3 635 Mar 3 2001 ANNUAL SEVEN-DAY MINIMUM 2590 Feb 25 2590 Feb 25 2001 MAXIMUM PEAK FLOW 20500 Mar 29 20500 Mar 29 2001 MAXIMUM PEAK STAGE 5.86 Jul 23 5.86 Jul 23 2001 INSTANTANEOUS LOW FLOW -16400 Jul 23 -16400 Jul 23 2001 10 PERCENT EXCEEDS 8240 7280 50 PERCENT EXCEEDS 5020 4520 90 PERCENT EXCEEDS 3100 3230

e Estimated79 SUWANNEE RIVER BASIN

02323592 SUWANNEE RIVER ABOVE GOPHER RIVER NEAR SUWANNEE, FL--Continued

ELEVATION (FEET NGVD), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .95 1.29 .43 -.08 .20 .70 .85 .25 1.05 1.02 .80 1.45 2 1.05 1.28 .48 -.54 -.32 .97 .62 .62 1.17 1.11 .94 1.40 3 .84 1.07 -.09 -.53 -.38 1.42 1.13 .58 .89 1.10 1.65 1.47 4 1.20 .97 -.55 -.25 -.13 1.71 1.23 .36 .89 1.12 1.83 1.33 5 1.16 1.13 .01 .41 .00 .35 1.22 .64 .89 1.20 1.91 1.30

6 1.12 1.54 .48 .41 .15 -.51 1.29 .89 .93 1.20 1.47 1.16 7 .77 1.64 .56 .61 .29 -.35 1.45 .74 .91 1.15 1.02 1.27 8 .30 1.73 .87 1.14 .33 .12 1.45 .55 .75 1.15 .92 1.30 9 -.90 2.26 1.01 -.01 .48 1.05 1.44 .93 .82 1.25 1.00 1.22 10 -.22 1.58 1.08 -.19 .50 .85 1.37 1.14 .89 1.21 1.07 .98

11 .52 1.02 1.03 .50 .23 .79 1.49 1.08 1.17 1.41 .99 .68 12 .82 1.19 1.14 .77 .24 1.17 1.34 1.01 1.81 1.42 .94 .98 13 .90 1.45 1.00 .06 .10 1.55 1.25 .82 .94 1.32 .84 .76 14 1.30 1.42 1.14 .33 .13 .65 1.11 .51 .66 .67 1.08 -.08 15 1.44 .47 .88 .30 .23 1.47 1.12 .74 .56 .59 1.53 -.24

16 1.42 1.21 1.27 .32 .41 1.14 .79 .88 .58 .65 1.50 .83 17 1.45 1.34 .88 .36 .29 .17 .54 .72 .58 .97 1.47 1.20 18 1.29 .47 -.09 .49 -.61 -.33 -.37 .66 .64 1.33 1.64 1.43 19 1.21 1.00 .38 1.04 -.06 -.11 .27 .74 .88 1.32 1.80 1.59 20 1.05 .00 -.71 .26 .43 1.21 .83 .95 .94 1.37 1.50 1.64

21 .99 -.57 .19 -.75 .59 .44 1.10 1.12 1.13 1.42 1.49 1.72 22 1.11 -.36 -.16 -.45 .82 .00 .84 1.26 1.31 1.45 1.30 1.44 23 .54 .47 -.68 -.77 .57 .36 1.07 1.23 1.44 2.14 1.36 1.30 24 .32 1.30 -.54 -.10 .51 .79 1.15 .98 1.08 2.59 1.20 1.37 25 .84 2.03 -.62 -.25 .72 1.08 1.14 1.22 .94 1.29 .93 1.01

26 1.26 1.22 -.41 -.29 .70 .97 .28 1.15 .81 1.08 .90 .64 27 1.43 .77 .72 .24 .38 .42 .34 .98 .65 .88 1.01 .84 28 1.41 .61 1.63 .35 .71 .64 .78 1.11 .56 .71 .90 1.04 29 1.54 .48 -.14 .64 --- 1.84 .55 1.26 .81 .60 .92 .34 30 1.32 .36 -.29 1.06 --- 1.62 .25 .83 .97 .70 1.10 -.14 31 1.23 --- -.56 .76 --- 1.19 --- .65 --- .68 1.32 ---

MEAN .96 1.01 .33 .19 .27 .75 .93 .86 .92 1.16 1.24 1.04 MAX 1.54 2.26 1.63 1.14 .82 1.84 1.49 1.26 1.81 2.59 1.91 1.72 MIN -.90 -.57 -.71 -.77 -.61 -.51 -.37 .25 .56 .59 .80 -.24

WATER-QUALITY RECORDS

PERIOD OF RECORD.--June 1999 to current year.

REMARKS.--Water temperature records poor; salinity records good. Water-quality measured at two elevations, 1.95 ft (top) and 1 0.02 ft (bottom) below NGVD of 1929.

TEMPERATURE, WATER TOP (DEG. C), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 24.3 22.7 17.5 13.1 16.7 22.4 17.3 22.6 27.6 27.6 28.0 28.7 2 24.5 22.7 17.4 12.8 16.7 22.7 17.5 22.9 27.1 27.8 27.5 28.6 3 24.6 22.7 17.4 12.5 16.1 22.9 17.9 23.1 27.6 27.8 27.1 28.3 4 24.7 22.9 16.4 12.2 15.6 22.8 18.5 23.4 28.0 27.8 27.1 27.7 5 25.0 23.0 15.7 12.2 15.4 21.6 19.0 23.5 28.2 28.0 27.1 27.4

6 25.3 23.0 15.4 12.5 15.3 20.4 19.4 23.9 28.4 28.0 27.0 27.1 7 25.2 23.0 15.3 12.5 15.5 19.4 19.8 24.1 28.8 27.9 27.4 27.1 8 24.8 23.0 15.3 12.9 16.1 18.9 20.3 23.9 29.2 28.0 27.5 27.6 9 23.1 23.1 16.0 12.9 16.8 18.6 20.7 23.8 29.4 28.7 27.9 27.7 10 21.4 23.1 16.7 12.4 17.6 18.4 21.1 23.9 29.2 28.8 28.4 27.7

11 20.9 22.4 17.4 12.2 18.3 18.6 21.6 24.1 28.9 28.5 28.7 27.7 12 20.9 21.9 18.1 12.5 18.8 19.2 22.1 24.6 28.7 28.5 28.8 27.5 13 21.1 21.5 18.9 12.4 19.2 20.0 22.6 25.3 28.5 28.7 28.9 27.0 14 21.2 21.5 19.5 12.7 19.6 20.7 22.9 25.6 28.6 28.4 28.8 25.8 15 21.4 20.6 20.1 13.7 20.1 21.2 23.3 25.9 28.6 28.2 28.5 24.8

16 21.5 19.8 20.6 14.8 20.8 21.5 23.6 26.2 28.4 28.3 28.6 24.8 17 21.6 19.8 20.4 15.5 20.9 20.8 23.4 26.4 28.3 28.3 28.6 24.9 18 21.8 19.5 19.1 16.2 20.2 19.2 22.3 26.6 27.4 28.0 28.7 25.2 19 22.0 18.9 17.8 17.0 19.5 17.8 21.9 26.6 27.2 28.1 28.9 25.4 20 22.2 18.2 16.2 17.2 19.7 17.7 21.7 26.6 27.4 28.2 29.1 25.8

21 22.3 17.4 15.1 16.3 20.0 17.3 21.9 26.4 27.9 27.7 28.9 26.3 22 22.5 16.6 14.6 15.6 20.3 17.1 22.3 26.6 27.6 27.9 28.8 26.6 23 22.4 16.0 13.8 15.1 20.3 17.4 22.6 26.8 27.0 28.2 28.8 26.9 24 22.2 15.9 13.6 14.9 20.2 17.5 23.1 26.4 26.9 27.4 28.9 26.7 25 22.2 16.5 13.6 14.6 20.6 17.2 23.1 26.4 27.2 26.9 29.1 26.3

26 22.2 16.9 13.6 14.3 21.2 16.8 22.8 26.6 27.6 27.6 29.0 25.7 27 22.1 17.0 14.1 14.2 21.8 16.2 22.6 26.7 27.9 28.1 28.9 25.2 28 22.2 17.1 14.6 14.5 22.2 16.1 22.5 26.7 27.7 28.3 28.8 24.9 29 22.4 17.3 14.8 15.3 --- 16.3 22.5 27.2 27.3 28.4 28.7 24.4 30 22.7 17.5 14.3 15.8 --- 16.6 22.6 27.3 27.2 28.7 28.8 23.5 31 22.7 --- 13.6 16.3 --- 16.9 --- 27.6 --- 28.5 28.8 ---

MEAN 22.7 20.0 16.4 14.1 18.8 19.0 21.4 25.4 28.0 28.1 28.4 26.4 MAX 25.3 23.1 20.6 17.2 22.2 22.9 23.6 27.6 29.4 28.8 29.1 28.7 MIN 20.9 15.9 13.6 12.2 15.3 16.1 17.3 22.6 26.9 26.9 27.0 23.580 SUWANNEE RIVER BASIN

02323592 SUWANNEE RIVER ABOVE GOPHER RIVER NEAR SUWANNEE, FL--Continued

TEMPERATURE, WATER BOTTOM (DEG. C), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 24.2 22.6 17.4 13.0 16.6 22.3 17.2 22.5 27.5 27.5 27.9 28.6 2 24.3 22.6 17.3 12.7 16.6 22.6 17.5 22.8 27.0 27.7 27.4 28.5 3 24.5 22.6 17.3 12.4 16.0 22.8 17.8 23.0 27.5 27.7 27.0 28.1 4 24.6 22.8 16.3 12.1 15.6 22.7 18.2 23.3 27.9 27.7 27.0 27.6 5 24.9 22.9 15.6 12.1 15.3 21.5 18.8 23.4 28.1 27.9 27.0 27.3

6 25.2 22.9 15.3 12.4 15.2 20.3 19.1 23.8 28.3 27.9 26.9 27.0 7 25.1 22.9 15.2 12.4 15.4 19.3 19.6 24.0 28.7 27.8 27.3 27.0 8 24.7 22.9 15.2 12.8 16.0 18.8 20.1 23.8 29.1 27.9 27.4 27.4 9 23.0 23.0 15.9 12.8 16.7 18.4 20.5 23.7 29.3 28.6 27.8 27.5 10 21.4 23.0 16.6 12.3 17.5 18.3 20.9 23.8 29.1 28.7 28.3 27.6

11 20.8 22.3 17.3 12.1 18.2 18.5 21.4 24.0 28.8 28.4 28.6 27.6 12 20.8 21.8 18.0 12.4 18.7 19.1 21.9 24.5 28.6 28.4 28.7 27.4 13 21.0 21.4 18.8 12.3 19.1 19.9 22.4 25.2 28.4 28.6 28.8 26.9 14 21.0 21.4 19.4 12.6 19.5 20.6 22.8 25.5 28.5 28.3 28.7 25.7 15 21.3 20.5 20.0 13.6 20.0 21.1 23.2 25.8 28.5 28.1 28.4 24.7

16 21.4 19.7 20.5 14.7 20.7 21.3 23.5 26.1 28.3 28.2 28.5 24.7 17 21.5 19.7 20.3 15.4 20.8 20.7 23.3 26.3 28.2 28.2 28.5 24.8 18 21.7 19.4 19.0 16.1 20.1 19.1 22.2 26.5 27.3 27.9 28.6 25.1 19 22.0 18.8 17.7 16.9 19.4 17.7 21.7 26.5 27.1 28.0 28.8 25.3 20 22.2 18.1 16.1 17.1 19.6 17.6 21.4 26.5 27.3 28.1 29.0 25.7

21 22.2 17.3 15.0 16.2 19.9 17.2 21.6 26.3 27.8 27.6 28.8 26.2 22 22.4 16.5 14.5 15.5 20.2 17.0 22.1 26.5 27.5 27.8 28.7 26.5 23 22.3 15.9 13.7 15.0 20.2 17.3 22.4 26.7 26.9 28.1 28.6 26.7 24 22.1 15.8 13.5 14.8 20.1 17.3 22.9 26.3 26.8 27.3 28.8 26.7 25 22.1 16.4 13.5 14.5 20.5 17.2 23.0 26.3 27.1 26.8 28.9 26.2

26 22.1 16.8 13.5 14.2 21.1 16.7 22.7 26.5 27.5 27.5 28.9 25.6 27 22.0 16.9 14.0 14.1 21.7 16.1 22.3 26.6 27.8 28.0 28.8 25.0 28 22.1 17.0 14.5 14.4 22.1 16.0 22.4 26.6 27.6 28.2 28.5 24.8 29 22.3 17.2 14.7 15.2 --- 16.3 22.4 27.1 27.2 28.3 28.4 24.3 30 22.6 17.4 14.2 15.7 --- 16.5 22.5 27.2 27.1 28.6 28.6 23.4 31 22.6 --- 13.5 16.2 --- 16.9 --- 27.5 --- 28.4 28.6 ---

MEAN 22.6 20.0 16.3 14.0 18.7 18.9 21.3 25.3 27.9 28.0 28.3 26.3 MAX 25.2 23.0 20.5 17.1 22.1 22.8 23.5 27.5 29.3 28.7 29.0 28.6 MIN 20.8 15.8 13.5 12.1 15.2 16.0 17.2 22.5 26.8 26.8 26.9 23.4

SALINITY, TOP (PARTS PER THOUSAND), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .09 .16 .18 .16 .13 .15 .05 .14 .17 .10 .14 .15 2 .09 .16 .18 .16 .13 .15 .05 .14 .17 .10 .14 .15 3 .09 .16 .18 .16 .13 .15 .05 .14 .17 .10 .14 .16 4 .09 .17 .17 .16 .12 .15 .05 .14 .17 .11 .14 .16 5 .09 .17 .17 .16 .12 .15 .05 .15 .17 .11 .14 .16

6 .09 .17 .17 .15 .12 .15 .05 .15 .17 .12 .13 .16 7 .10 .17 .17 .14 .12 .15 .05 .15 .17 .12 .13 .16 8 .10 .17 .16 .13 .12 .15 .05 .15 .17 .12 .13 .16 9 .11 .17 .16 .12 .12 .16 .05 .16 .17 .12 .13 .16 10 .12 .17 .16 .12 .12 .16 .05 .16 .17 .11 .13 .17

11 .12 .17 .16 .11 .12 .15 .05 .16 .17 .10 .13 .17 12 .13 .17 .16 .11 .13 .15 .05 .16 .17 .09 .12 .17 13 .13 .17 .16 .11 .13 .15 .06 .16 .17 .08 .11 .16 14 .13 .19 .16 .11 .13 .14 .06 .16 .17 .08 .10 .16 15 .13 .17 .17 .11 .13 .13 .07 .16 .17 .09 .10 .16

16 .13 .17 .17 .12 .13 .12 .07 .16 .17 .09 .11 .16 17 .13 .17 .17 .12 .13 .10 .08 .16 .15 .10 .11 .16 18 .14 .18 .17 .12 .13 .09 .08 .16 .08 .10 .11 .16 19 .14 .18 .17 .13 .13 .08 .09 .17 .06 .10 .12 .16 20 .14 .18 .17 .13 .14 .08 .09 .17 .06 .11 .12 .16

21 .14 .18 .17 .13 .14 .07 .10 .17 .06 .11 .13 .16 22 .15 .18 .17 .13 .14 .07 .10 .17 .06 .11 .13 .16 23 .15 .18 .17 .13 .14 .06 .11 .17 .06 1.0 .14 .16 24 .15 .18 .17 .13 .14 .06 .11 .17 .07 .15 .14 .16 25 .15 .34 .17 .13 .14 .05 .11 .17 .08 .12 .14 .16

26 .15 .17 .17 .14 .14 .05 .12 .17 .08 .13 .14 .16 27 .15 .17 .17 .14 .14 .04 .12 .17 .09 .13 .14 .16 28 .16 .17 .17 .14 .14 .04 .13 .17 .09 .13 .14 .16 29 .16 .18 .16 .14 --- .04 .13 .17 .09 .14 .15 .16 30 .16 .18 .16 .14 --- .04 .13 .17 .10 .14 .15 .16 31 .16 --- .16 .14 --- .04 --- .17 --- .14 .15 ---

MEAN .13 .18 .17 .13 .13 .11 .08 .16 .13 .14 .13 .16 MAX .16 .34 .18 .16 .14 .16 .13 .17 .17 1.0 .15 .17 MIN .09 .16 .16 .11 .12 .04 .05 .14 .06 .08 .10 .1581 SUWANNEE RIVER BASIN

02323592 SUWANNEE RIVER ABOVE GOPHER RIVER NEAR SUWANNEE, FL--Continued

SALINITY, BOTTOM (PARTS PER THOUSAND), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .09 .16 .18 .16 .14 .15 .05 .14 .18 .11 .14 .15 2 .09 .16 .18 .16 .13 .15 .05 .14 .18 .11 .14 .16 3 .09 .16 .18 .16 .13 .15 .05 .14 .18 .11 .14 .16 4 .09 .17 .17 .16 .13 .15 .05 .15 .18 .11 .14 .16 5 .09 .17 .17 .16 .13 .15 .05 .15 .18 .12 .14 .16

6 .09 .17 .17 .16 .12 .15 .05 .15 .17 .12 .14 .16 7 .10 .17 .17 .15 .12 .15 .05 .15 .18 .12 .13 .16 8 .10 .17 .16 .13 .12 .16 .05 .16 .18 .12 .13 .16 9 .11 .17 .16 .12 .12 .16 .05 .16 .18 .12 .13 .17 10 .12 .17 .16 .12 .13 .16 .05 .16 .18 .11 .13 .17

11 .12 .17 .16 .12 .13 .16 .05 .16 .18 .10 .13 .17 12 .13 .17 .16 .11 .13 .15 .06 .16 .18 .09 .12 .17 13 .13 .17 .16 .11 .13 .15 .06 .16 .18 .08 .11 .17 14 .13 .21 .16 .11 .13 .14 .07 .17 .18 .08 .10 .16 15 .13 .17 .17 .12 .13 .13 .07 .17 .18 .09 .10 .16

16 .13 .17 .17 .12 .13 .12 .07 .17 .17 .10 .11 .16 17 .13 .17 .17 .12 .13 .10 .08 .17 .16 .10 .11 .16 18 .14 .17 .17 .13 .14 .09 .09 .17 .09 .11 .12 .16 19 .14 .17 .17 .13 .14 .08 .09 .17 .07 .11 .12 .16 20 .14 .17 .17 .13 .14 .08 .10 .17 .07 .12 .13 .17

21 .14 .18 .17 .13 .14 .07 .10 .17 .06 .11 .13 .17 22 .14 .18 .17 .13 .14 .07 .11 .17 .07 .12 .13 .17 23 .15 .18 .17 .13 .14 .06 .11 .17 .07 1.6 .14 .17 24 .15 .18 .17 .13 .14 .06 .11 .17 .08 .16 .14 .17 25 .15 .61 .17 .14 .14 .05 .12 .17 .08 .12 .14 .16

26 .15 .17 .17 .14 .15 .05 .12 .18 .09 .13 .14 .16 27 .15 .17 .17 .14 .15 .04 .12 .18 .09 .13 .14 .16 28 .16 .17 .17 .14 .15 .04 .13 .18 .10 .14 .15 .16 29 .16 .17 .16 .14 --- .04 .13 .18 .10 .14 .15 .16 30 .16 .17 .16 .14 --- .04 .14 .18 .10 .14 .15 .16 31 .16 --- .16 .14 --- .04 --- .18 --- .14 .15 ---

MEAN .13 .19 .17 .13 .13 .11 .08 .16 .14 .16 .13 .16 MAX .16 .61 .18 .16 .15 .16 .14 .18 .18 1.6 .15 .17 MIN .09 .16 .16 .11 .12 .04 .05 .14 .06 .08 .10 .1582 STEINHATCHEE RIVER BASIN

02324000 STEINHATCHEE RIVER NEAR CROSS CITY, FL

LOCATION.--Lat 29 ° 47'11", long 83 ° 19'18", in NE 1 ⁄ 4 sec. 16, T. 8 S., R. 10 E., Taylor County, Hydrologic Unit 03110102, on right bank 0.7 mi downstream from Atlantic Coast Line Railroad bridge, 0.7 mi south of Clara, 13 mi upstream from mouth, and 16 mi northwest of Cross City.

DRAINAGE AREA.--350 mi 2 , approximately. See REMARKS.

PERIOD OF RECORD.--February 1950 to current year.

REVISED RECORDS.--WSP 1234: 1950. WSP 1724: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 7.84 ft above National Geodetic Vertical Datum of 1929.

REMARKS.--Records good, except for estimated daily discharges, which are poor. Below about 500 ft 3 /s, all flow enters sinkhole 0.5 mi downstream from gage. Above about 4,000 ft 3 /s, discharge measurements are made along U.S. Highways 19, 98, and Alternate 27, measurements include all flow from about 3 mi northwest to 5 mi southwest of main channel, drainage area is increased by about 30 mi 2

.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 226 20 15 e9.4 e22 15 116 6.6 3.6 34 e725 e782 2 197 19 14 e11 e22 16 101 6.4 3.8 41 e784 e825 3 174 19 13 e12 e22 16 90 5.9 3.6 45 e856 e882 4 154 18 12 e12 e21 18 83 5.4 3.4 57 e890 e900 5 139 17 12 e11 e22 22 76 5.4 3.3 65 e905 e927

6 127 17 12 e10 e22 19 69 5.0 3.3 66 e940 e958 7 152 16 11 e9.6 e22 19 63 5.0 3.1 62 e1010 e981 8 138 15 11 e9.7 22 17 58 5.0 3.0 56 e1090 e1020 9 120 15 11 e10 22 17 54 5.0 3.0 56 e1130 e1030 10 104 16 10 e11 21 19 50 5.0 3.3 61 e1160 e1030

11 93 15 9.7 e14 22 19 47 4.9 3.3 90 e1190 e1030 12 84 15 9.7 e15 21 19 44 4.8 3.7 89 e1140 e1020 13 75 14 9.7 e16 19 19 41 4.6 3.7 85 e1050 e1020 14 69 13 9.1 e17 19 23 39 4.5 2.8 103 e1030 e1010 15 63 13 9.1 e18 19 30 38 4.3 2.5 100 e1020 e964

16 58 12 9.3 e18 19 55 34 4.3 2.4 94 e928 e900 17 54 13 9.3 e16 18 60 30 4.3 2.4 83 e875 e852 18 50 12 8.6 e17 17 75 24 4.1 2.9 104 e803 e838 19 47 12 8.5 e19 15 90 20 3.9 2.6 138 e910 e822 20 44 14 8.3 e24 15 112 18 3.9 3.0 127 e1020 e803

21 41 14 8.6 e23 14 116 16 3.8 2.6 233 e1150 e759 22 39 13 8.6 e22 14 107 14 3.7 2.5 252 e1310 e720 23 36 12 8.6 e21 14 93 13 3.8 5.3 250 e1220 e684 24 32 12 8.6 e20 15 81 11 3.7 7.8 734 e1090 e642 25 30 15 8.6 e21 18 75 11 3.7 18 1220 e982 e704

26 28 21 8.8 e20 17 84 11 3.5 37 1350 e900 e778 27 26 21 8.7 e19 15 75 11 3.5 32 1340 e821 e743 28 24 19 9.7 e21 15 68 9.3 3.7 26 1230 e766 e719 29 23 18 12 e21 --- 69 8.3 3.6 25 e1080 e732 e710 30 22 17 e10 e21 --- 115 7.5 3.4 35 e915 e695 e681 31 21 --- e9.6 e24 --- 122 --- 3.3 --- e840 e744 ---

MEAN 80.3 15.6 10.1 16.5 18.7 54.4 40.2 4.45 8.46 355 963 858 MAX 226 21 15 24 22 122 116 6.6 37 1350 1310 1030 MIN 21 12 8.3 9.4 14 15 7.5 3.3 2.4 34 695 642 IN. .26 .05 .03 .05 .06 .18 .13 .01 .03 1.17 3.17 2.74

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1950 - 2001, BY WATER YEAR (WY)

MEAN 286 123 188 327 468 486 334 122 115 307 504 492 MAX 1436 1291 998 1186 2266 2022 1443 972 925 1305 2496 3820 (WY) 1958 1952 1954 1998 1998 1991 1982 1978 1957 1964 1970 1964 MIN 16.0 6.34 6.87 12.4 13.0 15.1 8.21 4.45 2.37 2.99 4.75 29.5 (WY) 1956 2000 2000 2000 1957 2000 2000 2001 2000 2000 1998 1956

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1950 - 2001

ANNUAL MEAN 50.4 203 313 HIGHEST ANNUAL MEAN 901 1964 LOWEST ANNUAL MEAN 35.4 1956 HIGHEST DAILY MEAN 1360 Sep 20 1350 Jul 26 16400 Sep 14 1964 LOWEST DAILY MEAN 1.5 Jun 13 2.4 Jun 16 1.5 Jun 13 2000 ANNUAL SEVEN-DAY MINIMUM 1.6 Jun 8 2.6 Jun 15 1.6 Jun 8 2000 MAXIMUM PEAK FLOW 1370 Jul 26 17600 Sep 13 1964 MAXIMUM PEAK STAGE 10.32 Jul 26 18.90 Sep 13 1964 INSTANTANEOUS LOW FLOW 2.4 Jun 15 1.4 Jun 11 2000 ANNUAL RUNOFF (INCHES) 1.96 7.89 12.16 10 PERCENT EXCEEDS 80 902 856 50 PERCENT EXCEEDS 9.6 21 113 90 PERCENT EXCEEDS 2.6 4.2 14

e Estimated83 FENHOLLOWAY RIVER BASIN

02324400 FENHOLLOWAY RIVER NEAR FOLEY, FL

LOCATION.--Lat 30 ° 05'53", long 83 ° 28'19", in NE 1 ⁄ 4 sec. 36, T. 4 S., R. 8 E., Taylor County, Hydrologic Unit 03110102, near left bank at downstream side of bridge on U.S. Highway 27, 1.8 mi upstream from small tributary, 4 mi northeast of Foley, and 32 mi upstream from mouth.

DRAINAGE AREA.--60 mi 2 approximately.

PERIOD OF RECORD.--February to August 1955 (discharge measurements only); September 1955 to current year.

REVISED RECORDS.--WSP 1905: Drainage area: WDR FL-92-4: 1991.

GAGE.--Water-stage recorder. Datum of gage is 53.59 ft above National Geodetic Vertical Datum of 1929 (Florida Department of Transportation bench mark).

REMARKS.--Records fair, except for estimated daily discharges, which are poor.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 29 e2.4 .67 .55 e.47 e.50 52 1.7 .50 12 53 8.0 2 26 e2.0 .65 .53 e.46 e.50 48 1.4 .52 31 53 11 3 24 e1.7 .64 .52 e.46 e.49 43 1.2 .50 24 46 20 4 22 e1.5 .64 .52 e.46 e.50 39 1.1 .48 18 46 35 5 20 e1.2 .62 .54 e.45 e.49 35 .96 .52 14 45 31

6 19 e1.0 .59 .53 e.45 e.48 32 .89 .58 11 68 26 7 25 e.89 .60 .52 e.44 e.47 29 .79 .56 8.2 63 23 8 29 .75 .58 .55 .45 e.46 26 .76 .64 6.0 83 20 9 26 .74 .58 .55 e.46 e.47 23 .68 .72 4.5 86 18 10 24 .71 .57 e.54 e.47 e.48 21 .67 .69 3.7 79 16

11 21 .70 .57 e.54 e.47 e.47 19 .62 .68 6.4 64 14 12 19 .67 .56 e.54 e.47 .67 17 .60 .92 17 50 13 13 18 .65 .54 e.54 e.46 17 15 .58 1.6 9.6 41 12 14 16 .71 .55 e.53 e.46 36 13 .57 2.6 7.1 34 11 15 15 .76 .52 e.53 e.47 37 12 .54 1.6 5.6 32 9.9

16 13 .73 .53 e.52 e.47 40 12 .49 1.2 4.0 31 8.6 17 12 .71 .55 e.52 e.46 40 11 .50 1.0 3.0 59 7.3 18 11 .69 .54 e.52 e.46 45 9.5 .53 .97 2.4 59 6.1 19 10 .62 .57 e.51 e.47 52 8.3 .49 2.5 2.1 55 5.2 20 9.3 .63 .63 e.51 e.48 64 7.2 .50 2.8 2.3 49 4.6

21 8.5 .62 .63 e.50 e.47 75 6.3 .52 1.9 42 40 4.0 22 7.7 .61 .62 e.50 e.48 81 5.5 .50 1.5 26 32 3.8 23 e7.0 .59 .60 e.50 e.49 75 4.5 .46 1.5 20 26 5.7 24 e6.4 .61 .52 e.50 e.50 67 3.8 .43 2.3 67 22 6.4 25 e5.8 .66 .51 e.49 e.51 60 3.5 .40 1.9 106 19 6.4

26 e5.2 .69 .52 e.49 e.50 56 3.5 .42 1.4 79 17 5.9 27 e4.7 .71 .52 e.48 e.49 51 3.0 .43 1.1 63 15 5.0 28 e4.1 .70 .56 e.48 e.48 46 2.6 .44 1.9 51 13 4.3 29 e3.6 .68 .59 e.48 --- 45 2.2 .47 4.3 51 11 3.6 30 e3.2 .68 .56 e.48 --- 54 1.9 .49 14 38 9.6 3.0 31 e2.7 --- .55 e.47 --- 54 --- .50 --- 37 8.4 ---

MEAN 14.4 .88 .58 .52 .47 32.3 17.0 .67 1.78 24.9 42.2 11.6 MAX 29 2.4 .67 .55 .51 81 52 1.7 14 106 86 35 MIN 2.7 .59 .51 .47 .44 .46 1.9 .40 .48 2.1 8.4 3.0 IN. .28 .02 .01 .01 .01 .62 .32 .01 .03 .48 .81 .22

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1956 - 2001, BY WATER YEAR (WY)

MEAN 38.0 12.9 25.5 46.0 72.2 86.2 69.5 25.0 30.5 47.1 78.5 58.4 MAX 389 81.5 185 179 259 377 413 147 478 194 580 560 (WY) 1958 1977 1977 1987 1998 1991 1973 1964 1957 1964 1970 1964 MIN .53 .70 .58 .52 .47 1.17 .50 .31 .32 .36 .50 .64 (WY) 1994 1969 2001 2001 2001 2000 2000 2000 2000 2000 1993 1993

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1956 - 2001

ANNUAL MEAN 5.01 12.4 49.0 HIGHEST ANNUAL MEAN 154 1964 LOWEST ANNUAL MEAN 4.42 2000 HIGHEST DAILY MEAN 121 Sep 20 106 Jul 25 2710 Sep 12 1964 LOWEST DAILY MEAN .20 Jun 16 .40 May 25 .20 Jun 16 2000 ANNUAL SEVEN-DAY MINIMUM .21 Jun 10 .44 May 23 .21 Jun 10 2000 MAXIMUM PEAK FLOW 119 Jul 25 3210 Sep 12 1964 MAXIMUM PEAK STAGE 5.50 Jul 25 15.21 Sep 12 1964 INSTANTANEOUS LOW FLOW .40 May 24 .20 Jun 11 2000 ANNUAL RUNOFF (INCHES) 1.14 2.81 11.11 10 PERCENT EXCEEDS 12 45 135 50 PERCENT EXCEEDS .67 1.9 15 90 PERCENT EXCEEDS .28 .48 1.3

e Estimated84 FENHOLLOWAY RIVER BASIN

02325000 FENHOLLOWAY RIVER NEAR PERRY, FL

LOCATION.--Lat 30 ° 04'16", long 83 ° 39'45", in SE 1 ⁄ 4 sec. 6, T. 5 S., R. 7 E., Taylor County, Hydrologic Unit 03110102, near right bank on downstream side of old bridge at State Highway 356, 1.0 mi southwest of the community of Hampton Springs, 5.5 mi southwest of Perry, and 14 mi upstream from mouth.

DRAINAGE AREA.--160 mi 2 , approximately.

PERIOD OF RECORD.--August 1946 to June 1952 (discharge measurements only); August 1952 to October 1954 (gage heights and discharge measurements only); November 1964 to July 1977 (crest-stage and periodic discharge measurements only); August 1977 to September 1984. May 1986 to current year.

REVISED RECORDS.--WSP 1905: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929. August 13, 1946 to October 1954, nonrecording gage at same site at datum 5.00 ft higher. November 1964 to July 1977, nonrecording gage at same site and datum

. REMARKS.--No estimated daily discharges. Records good. Natural flow of stream affected by large ground-water withdrawals by cellulose plant about 10 mi upstream. Flow affected by backwater from Spring Creek at times.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 129 95 82 76 68 65 151 88 70 94 119 114 2 125 92 81 77 69 77 148 89 71 92 115 117 3 124 90 81 77 69 74 144 88 68 92 116 117 4 123 83 80 75 70 79 144 84 67 95 122 122 5 122 86 79 73 70 79 141 81 66 92 124 122

6 120 85 80 73 70 74 136 80 65 89 136 121 7 123 87 80 72 65 73 132 83 64 89 138 124 8 119 87 80 74 63 70 127 80 62 88 141 124 9 116 83 80 73 70 72 125 81 65 87 144 130 10 114 84 79 73 73 76 122 76 69 87 147 128

11 111 85 80 74 77 71 119 76 70 109 148 126 12 110 83 82 75 77 70 118 78 71 93 144 128 13 107 81 80 75 76 102 117 80 77 94 137 123 14 106 86 79 75 74 102 117 78 82 107 129 121 15 106 83 82 75 74 102 116 77 67 105 133 117

16 106 82 82 75 75 122 113 77 69 100 118 110 17 102 79 81 73 75 115 110 76 71 94 117 112 18 104 80 78 71 71 124 107 76 71 97 127 109 19 103 79 79 73 71 128 99 74 81 92 156 107 20 100 81 78 76 73 141 105 74 81 99 169 108

21 97 78 80 73 74 136 104 75 77 119 152 104 22 99 77 78 72 71 132 103 74 86 108 141 102 23 97 78 77 70 74 131 100 74 92 101 134 108 24 96 81 77 68 73 135 98 72 94 110 125 111 25 91 88 76 69 77 137 103 72 88 129 120 111

26 95 89 78 68 75 146 101 71 87 114 118 108 27 94 85 77 67 66 140 98 72 87 110 116 107 28 95 82 77 69 67 136 94 71 87 108 113 105 29 92 82 80 69 --- 142 91 71 87 111 111 104 30 92 83 78 69 --- 155 88 72 91 108 108 99 31 95 --- 76 71 --- 151 --- 71 --- 113 110 ---

MEAN 107 83.8 79.3 72.6 71.7 108 116 77.1 76.1 101 130 115 MAX 129 95 82 77 77 155 151 89 94 129 169 130 MIN 91 77 76 67 63 65 88 71 62 87 108 99 IN. .77 .58 .57 .52 .47 .78 .81 .56 .53 .73 .94 .80

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1977 - 2001, BY WATER YEAR (WY)

MEAN 172 139 148 184 233 268 249 155 139 185 224 176 MAX 451 266 369 476 495 699 652 316 317 475 492 310 (WY) 1995 1981 1987 1987 1987 1991 1983 1983 1983 1984 1991 1988 MIN 75.7 83.8 79.3 72.6 71.7 80.0 81.8 77.1 76.1 85.9 82.8 94.2 (WY) 1991 2001 2001 2001 2001 2000 2000 2001 2001 2000 1993 1993

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1977 - 2001

ANNUAL MEAN 90.2 94.9 190 HIGHEST ANNUAL MEAN 317 1983 LOWEST ANNUAL MEAN 91.9 2000 HIGHEST DAILY MEAN 189 Sep 18 169 Aug 20 1130 Jul 31 1982 LOWEST DAILY MEAN 69 Mar 9 62 Jun 8 35 Oct 8 1990 ANNUAL SEVEN-DAY MINIMUM 75 Jan 11 65 Jun 3 48 Oct 4 1990 MAXIMUM PEAK FLOW 175 Aug 20 1360 Sep 18 1964 MAXIMUM PEAK STAGE 13.57 Aug 20 24.39 Sep 13 1964 INSTANTANEOUS LOW FLOW 60 Mar 1 35 Oct 8 1990 ANNUAL RUNOFF (INCHES) 7.68 8.05 16.11 10 PERCENT EXCEEDS 117 129 340 50 PERCENT EXCEEDS 84 87 145 90 PERCENT EXCEEDS 77 71 9485 ECONFINA RIVER BASIN

02326000 ECONFINA RIVER NEAR PERRY, FL

LOCATION.--Lat 30 ° 10'14", long 83 ° 49'26", in NE 1 ⁄ 4 sec. 4, T. 4 S., R. 5 E., Taylor County, Hydrologic Unit 03110102, on downstream side of concrete bridge, 3.0 mi downstream from Natural Well Branch, 14 mi upstream from mouth, and 14.7 mi northwest of Perry.

DRAINAGE AREA.--198 mi 2

.
PERIOD OF RECORD.--February 1950 to September 2000, October 2000 to September 2001 (fragmentary).

REVISED RECORDS.--WSP 1905: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 14.35 ft above National Geodetic Vertical Datum of 1929.

REMARKS.--No estimated daily discharges. Records poor.

EXTREMES FOR CURRENT YEAR.--Maximum discharge 139 ft 3 /s, Apr. 1, gage height, 4.74 ft; minimum 16 ft 3 /s, Jan. 29, 30.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 53 21 24 21 18 18 139 33 --- --- --- --- 2 51 21 24 20 19 18 137 31 --- --- --- --- 3 49 20 23 19 20 18 130 30 --- --- --- --- 4 47 20 23 19 20 20 124 29 --- --- --- --- 5 45 20 23 19 20 21 118 28 --- --- --- ---

6 44 19 22 19 19 24 111 27 --- --- --- --- 7 49 19 22 19 19 26 105 26 --- --- --- --- 8 50 19 21 19 19 24 99 25 --- --- --- --- 9 48 19 21 18 19 23 93 24 --- --- --- --- 10 46 19 21 18 19 24 88 24 --- --- --- ---

11 43 19 21 18 19 25 83 23 --- --- --- --- 12 41 19 21 18 19 28 78 23 --- --- --- --- 13 38 18 21 18 19 37 73 22 --- --- --- --- 14 37 19 20 18 19 43 69 21 --- --- --- --- 15 35 18 20 18 19 54 66 --- --- --- --- ---

16 34 18 20 18 19 60 62 --- --- --- --- --- 17 32 18 20 17 19 58 59 --- --- --- --- --- 18 31 18 20 17 18 61 55 --- --- --- --- --- 19 30 18 20 17 18 68 52 --- --- --- --- --- 20 29 18 20 18 18 79 50 --- --- --- --- ---

21 28 18 20 18 18 92 47 --- --- --- --- --- 22 27 18 20 18 18 100 44 --- --- --- --- --- 23 26 17 19 18 18 101 42 --- --- --- --- --- 24 25 18 19 18 18 98 40 --- --- --- --- --- 25 25 21 19 18 18 96 39 --- --- --- --- ---

26 24 22 18 17 18 95 39 --- --- --- --- --- 27 23 24 18 17 18 93 39 --- --- --- --- --- 28 23 25 19 17 18 90 37 --- --- --- --- --- 29 22 25 19 17 --- 101 36 --- --- --- --- --- 30 22 25 20 17 --- 124 34 --- --- --- --- --- 31 21 --- 20 18 --- 134 --- --- --- --- --- ---

MEAN 35.4 19.8 20.6 18.1 18.7 59.8 72.9 --- --- --- --- --- MAX 53 25 24 21 20 134 139 --- --- --- --- --- MIN 21 17 18 17 18 18 34 --- --- --- --- --- IN. .21 .11 .12 .11 .10 .35 .41 --- --- --- --- ---

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2001, BY WATER YEAR (WY)

MEAN 115 64.4 97.4 139 218 247 217 87.0 87.7 111 171 142 MAX 816 305 771 624 813 828 1176 379 432 381 756 1266 (WY) 1995 1998 1977 1987 1986 1991 1973 1964 1957 1958 1991 1957 MIN 6.26 8.18 6.22 9.47 7.50 9.97 13.2 7.73 4.80 4.49 8.31 9.12 (WY) 1994 1969 1991 1957 1957 1957 1955 1955 1955 1955 1993 1993

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR WATER YEARS 1951 - 2001

ANNUAL MEAN 21.5 142 HIGHEST ANNUAL MEAN 317 1991 LOWEST ANNUAL MEAN 18.1 1955 HIGHEST DAILY MEAN 59 Sep 25 2480 Sep 18 1957 LOWEST DAILY MEAN 3.4 Jul 11 2.4 Jul 8 1955 ANNUAL SEVEN-DAY MINIMUM 4.0 Jul 7 2.6 Jul 3 1955 MAXIMUM PEAK FLOW 2540 Sep 17 1957 MAXIMUM PEAK STAGE 12.78 Sep 17 1957 INSTANTANEOUS LOW FLOW 2.3 Jul 8 1955 ANNUAL RUNOFF (INCHES) 1.48 9.76 10 PERCENT EXCEEDS 32 370 50 PERCENT EXCEEDS 21 60 90 PERCENT EXCEEDS 8.8 1886 AUCILLA RIVER BASIN

02326500 AUCILLA RIVER AT LAMONT, FL

LOCATION.--Lat 30 ° 22'11", long 83 ° 48'25" in NE 1 ⁄ 4 sec.27, T.1 S., R.5 E., Madison County, Hydrologic Unit 03110103, near left bank on downstream side of bridge on U.S. Highway 19, 0.6 mi southeast of Lamont, and 34 mi upstream from mouth.

DRAINAGE AREA.--747 mi 2

. PERIOD OF RECORD.--February 1950 to September 1979, November 1983 to September 1992 (gage heights and peak discharge only), October 1996 to current year.

REVISED RECORDS.--WSP 1204, 1905: Drainage area. WSP 1504: 1953.

Gage.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929. Prior to September 1992, at datum 42.90 ft lower.

REMARKS.--Records fair. Pumpage above and below station for irrigation during dry seasons. Since Aug. 27, 1963, low-head rock and concrete dam 0.6mi downstream.

COOPERATION.--Records from October 1999 to September 2001, were collected and computed by Suwannee River Water Management District and reviewed by Geological Survey.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 11,500 ft 3 /s. Apr. 8, 1973, gage height, 16.57 ft; minimum, river dry at gage June 13-16, 1955.

EXTREMES FOR 2000 WATER YEAR.--Maximum daily discharge 234 ft 3 /s, Apr. 5, gage height, 49.17 ft; minimum daily, .85 ft 3 /s, July 11.

EXTREMES FOR CURRENT YEAR.--Maximum daily discharge 1,630 ft 3 /s, June 24, gage height, 52.47 ft; minimum daily, 2.7 ft 3 /s, May 28.

REVISIONS.--Daily and monthly discharges for the water year 2000 were revised.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 16 17 7.6 10 23 58 175 66 4.9 3.2 1.8 1.6 2 13 30 7.4 10 23 54 191 61 4.7 2.2 3.1 2.1 3 11 40 7.2 10 22 51 212 53 4.5 1.9 3.7 3.0 4 10 36 7.6 10 21 48 232 46 4.3 1.6 3.7 5.5 5 10 29 7.6 10 22 45 234 38 5.4 1.4 3.7 9.1

6 14 26 7.6 11 23 42 222 32 13 1.3 3.4 16 7 16 26 7.4 9.8 23 38 204 26 9.3 1.1 3.0 32 8 16 25 7.0 9.6 22 36 190 22 6.6 e1.0 2.7 32 9 14 23 7.2 9.8 21 36 172 18 5.5 e.90 3.2 26 10 12 24 7.2 10 21 35 154 15 5.0 e.85 4.5 21

11 12 23 7.4 11 21 34 137 13 4.7 .85 5.1 19 12 12 14 7.4 12 22 36 123 11 4.5 .93 6.0 17 13 12 12 7.7 12 25 36 113 10 5.0 1.1 9.3 14 14 11 11 8.4 12 30 34 104 9.3 5.5 1.8 8.3 12 15 10 10 9.6 12 45 32 97 8.2 5.2 1.9 6.0 9.6

16 10 9.8 9.3 13 50 31 90 7.6 5.0 1.8 4.3 7.6 17 10 9.3 8.6 12 62 36 81 6.9 4.8 1.5 3.2 6.2 18 9.3 9.1 8.4 12 58 39 72 6.5 4.5 1.3 2.9 21 19 9.1 9.1 8.9 12 48 36 63 6.1 4.4 1.1 2.6 46 20 9.3 9.3 9.3 13 42 51 56 5.9 4.4 1.0 2.8 41

21 9.3 9.6 10 14 42 68 50 5.6 5.2 .90 3.0 37 22 9.6 9.6 11 15 48 63 45 5.6 5.1 .93 3.4 42 23 9.6 8.6 11 15 49 59 40 8.2 5.0 1.5 4.0 81 24 9.3 8.4 10 22 48 58 34 9.8 5.7 1.2 3.1 81 25 8.9 8.6 10 35 46 56 34 8.6 6.9 1.8 2.7 75

26 8.6 8.6 9.8 32 43 53 33 7.4 6.2 2.4 2.5 79 27 8.6 8.6 10 27 42 66 31 6.6 5.6 2.8 2.7 82 28 8.9 7.7 9.8 23 65 87 32 6.2 6.1 2.2 2.7 82 29 9.1 7.6 10 21 66 86 46 5.7 6.0 1.8 2.3 79 30 9.6 7.6 10 20 --- 85 62 5.3 5.4 1.6 1.9 75 31 12 --- 10 21 --- 119 --- 5.0 --- 1.5 1.7 ---

TOTAL 340.2 477.5 270.4 466.2 1073 1608 3329 535.5 168.4 47.36 113.3 1054.7 MEAN 11.0 15.9 8.72 15.0 37.0 51.9 111 17.3 5.61 1.53 3.65 35.2 MAX 16 40 11 35 66 119 234 66 13 3.2 9.3 82 MIN 8.6 7.6 7.0 9.6 21 31 31 5.0 4.3 .85 1.7 1.6 AC-FT 675 947 536 925 2130 3190 6600 1060 334 94 225 2090 CFSM .01 .02 .01 .02 .05 .07 .15 .02 .01 .00 .00 .05 IN. .02 .02 .01 .02 .05 .08 .17 .03 .01 .00 .01 .05

WTR YR 2000 TOTAL 9483.56 MEAN 25.9 MAX 234 MIN .85 AC-FT 18810 CFSM .03 IN. .47

e Estimated87 AU C IL L A R I VER BAS I N

0 232 6 500 AUC I LLA RI V ER A T L A MON T , F L --C o nti n ued

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 70 10 18 18 23 14 1400 58 5.3 850 183 65 2 63 9.6 20 18 24 17 1360 53 5.8 875 157 59 3 57 9.6 21 19 28 19 1270 48 6.9 990 145 56 4 50 9.3 20 20 30 25 1160 42 5.5 e1000 118 73 5 44 9.0 20 19 28 36 1080 38 4.2 e900 108 75

6 39 8.8 20 19 28 37 975 34 3.2 e800 147 70 7 46 8.6 19 18 26 38 875 29 3.0 e700 175 66 8 43 7.8 19 17 26 38 780 25 3.0 e600 202 76 9 37 7.8 18 18 25 38 694 22 4.0 502 189 102 10 32 7.1 18 17 25 41 614 19 9.8 424 184 107

11 29 6.6 16 16 26 41 550 16 16 378 243 97 12 27 6.2 16 16 26 38 487 14 156 345 198 88 13 24 6.0 15 16 26 69 427 12 283 311 178 79 14 22 6.0 14 16 26 150 380 10 321 285 192 76 15 20 6.0 13 16 25 181 383 8.6 535 253 213 69

16 18 6.2 12 16 24 245 321 7.3 514 217 192 63 17 16 6.4 11 17 23 299 281 6.4 526 190 225 59 18 15 6.9 8.6 18 23 333 243 5.8 950 171 275 56 19 14 8.3 8.0 18 21 384 217 5.1 1430 159 271 51 20 12 8.8 8.0 18 20 451 195 4.7 1580 140 249 46

21 11 9.3 7.6 17 18 535 175 4.3 1600 189 217 42 22 10 8.8 7.1 17 17 568 156 4.0 1530 177 192 38 23 10 8.3 6.9 18 16 574 137 3.4 1520 141 175 41 24 9.8 7.8 6.4 19 15 571 122 3.1 1630 145 159 41 25 9.8 9.8 6.2 19 15 556 109 3.0 1550 175 144 46

26 10 13 6.0 18 15 577 101 2.9 1420 156 131 42 27 10 16 5.8 18 14 583 87 2.8 1250 129 122 37 28 11 15 6.9 18 13 580 78 2.7 1130 112 107 33 29 11 15 10 17 --- 706 70 3.2 1030 101 93 30 30 10 17 17 16 --- 1240 63 6.6 920 94 81 26 31 10 --- 18 19 --- 1400 --- 5.8 --- 128 72 ---

TOTAL 790.6 275.0 412.5 546 626 10384 14790 499.7 19941.7 11637 5337 1809 MEAN 25.5 9.17 13.3 17.6 22.4 335 493 16.1 665 375 172 60.3 MAX 70 17 21 20 30 1400 1400 58 1630 1000 275 107 MIN 9.8 6.0 5.8 16 13 14 63 2.7 3.0 94 72 26 AC-FT 1570 545 818 1080 1240 20600 29340 991 39550 23080 10590 3590 CFSM .03 .01 .02 .02 .03 .45 .66 .02 .89 .50 .23 .08 IN. .04 .01 .02 .03 .03 .52 .74 .02 .99 .58 .27 .09

CAL YR 2000 TOTAL 9873.56 MEAN 27.0 MAX 234 MIN .85 AC-FT 19580 CFSM .04 IN. .49 WTR YR 2001 TOTAL 67048.5 MEAN 184 MAX 1630 MIN 2.7 AC-FT 133000 CFSM .25 IN. 3.34

e Estimated88

AUCILLA RIVER BASIN

02326500 AUCILLA RIVER AT LAMONT, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 47.82 46.41 46.70 46.68 46.82 46.56 52.08 47.62 46.21 51.04 48.75 47.74 2 47.72 46.39 46.73 46.69 46.85 46.65 52.02 47.52 46.23 51.09 48.58 47.64 3 47.60 46.39 46.76 46.72 46.95 46.71 51.86 47.42 46.28 51.32 48.50 47.59 4 47.46 46.38 46.74 46.73 47.02 46.88 51.67 47.31 46.22 --- 48.29 47.86 5 47.35 46.37 46.73 46.72 46.95 47.16 51.49 47.21 46.15 --- 48.21 47.88

6 47.24 46.36 46.73 46.71 46.95 47.19 51.29 47.11 46.09 --- 48.51 47.82 7 47.37 46.35 46.72 46.69 46.92 47.20 51.09 46.99 46.05 --- 48.70 47.75 8 47.32 46.32 46.71 46.66 46.90 47.21 50.90 46.89 46.05 --- 48.88 47.90 9 47.18 46.32 46.70 46.68 46.89 47.20 50.71 46.80 46.14 50.14 48.79 48.16 10 47.05 46.29 46.67 46.65 46.89 47.28 50.51 46.71 46.40 49.88 48.76 48.20

11 46.99 46.27 46.62 46.60 46.91 47.27 50.30 46.62 46.61 49.71 49.09 48.12 12 46.93 46.25 46.60 46.61 46.92 47.20 50.09 46.55 48.57 49.58 48.85 48.04 13 46.86 46.24 46.57 46.63 46.91 47.80 49.89 46.48 49.29 49.43 48.72 47.94 14 46.79 46.24 46.55 46.63 46.90 48.53 49.72 46.41 49.48 49.30 48.81 47.90 15 46.73 46.24 46.51 46.61 46.88 48.74 49.73 46.35 50.25 49.14 48.94 47.80

16 46.68 46.25 46.48 46.61 46.86 49.10 49.49 46.30 50.18 48.96 48.81 47.71 17 46.62 46.26 46.45 46.64 46.84 49.37 49.28 46.26 50.22 48.80 49.00 47.64 18 46.58 46.28 46.35 46.68 46.83 49.53 49.09 46.23 51.24 48.67 49.25 47.57 19 46.55 46.34 46.33 46.69 46.76 49.74 48.96 46.20 52.14 48.59 49.23 47.48 20 46.50 46.36 46.33 46.69 46.73 49.97 48.83 46.18 52.39 48.46 49.12 47.38

21 46.46 46.38 46.31 46.66 46.69 50.25 48.70 46.16 52.41 48.79 48.96 47.29 22 46.42 46.36 46.29 46.65 46.66 50.36 48.57 46.14 52.30 48.71 48.81 47.22 23 46.41 46.34 46.28 46.68 46.63 50.38 48.44 46.11 52.29 48.47 48.70 47.28 24 46.40 46.32 46.26 46.71 46.59 50.37 48.32 46.07 52.47 48.50 48.59 47.28 25 46.40 46.40 46.25 46.72 46.58 50.32 48.22 46.06 52.34 48.70 48.49 47.37

26 46.41 46.53 46.24 46.70 46.57 50.39 48.15 46.03 52.11 48.57 48.39 47.29 27 46.42 46.60 46.23 46.68 46.55 50.41 48.03 46.01 51.84 48.38 48.32 47.18 28 46.43 46.59 46.28 46.67 46.53 50.40 47.92 45.99 51.60 48.24 48.20 47.09 29 46.43 46.59 46.42 46.64 --- 50.74 47.81 46.10 51.40 48.15 48.08 47.01 30 46.42 46.65 46.66 46.63 --- 51.81 47.71 46.27 51.18 48.09 47.96 46.92 31 46.42 --- 46.68 46.72 --- 52.08 --- 46.23 --- 48.37 47.85 ---

TOTAL 1451.96 1391.07 1441.88 1446.78 1310.48 1514.80 1490.87 1442.33 1482.13 --- 1508.14 1428.05 MEAN 46.84 46.37 46.51 46.67 46.80 48.86 49.70 46.53 49.40 --- 48.65 47.60 MAX 47.82 46.65 46.76 46.73 47.02 52.08 52.08 47.62 52.47 --- 49.25 48.20 MIN 46.40 46.24 46.23 46.60 46.53 46.56 47.71 45.99 46.05 --- 47.85 46.9289 ST. MARKS RIVER BASIN

304308083555200 WARD CREEK BL MITCHELL POND NEAR METCALF, GA

LOCATION.--Lat 30 ° 43'08", long 83 ° 55'52", in Thomas County, Hydrologic Unit 03120001, on downstream side of bridge on dirt road, and 3.6 mi east of Metcalf.

DRAINAGE AREA.--15.1 mi 2

. PERIOD OF RECORD.--October 1998 to September 2000, October 2000 to September 2001 (gage heights and discharge measurements only).

GAGE.--Water-stage recorder.

REMARKS.--Gage height record fragmentary and intermittent throughtout year. Channel bed dry for long prolonged drought periods.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge 100 ft3/s (estimated), Oct. 1, 1998, gage height, undetermined; minimum, dry, many days each year.

EXTREMES FOR CURRENT YEAR.--Maximum discharge measured 23 ft 3 /s, June 13, gage height, 4.59 ft; minimum, dry, many days.

DISCHARGE MEASUREMENTS, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001

DATE TIME STREAM DISCHARGE STAGE IN FT3/S

Oct. 4 0800 Dry

Dec. 12 0830 Dry

Mar. 12 1440 3.06 1.98

Mar. 15 1240 3.48 5.95

Mar. 20 1130 3.32 4.36

Apr. 9 1245 3.36 5.02

May 17 1200 Dry

June 13 1045 4.59 23.190 ST. MARKS RIVER BASIN

02326900 ST. MARKS RIVER NEAR NEWPORT, FL

LOCATION.--Lat 30 ° 16'00", long 84 ° 09'00", in SE 1 ⁄ 4 sec. 32, T. 2 S., R. 2 E., Wakulla County, Hydrologic Unit 03120001, on left bank 0.9 mi downstream from Rhodes Springs, 6 mi north of Newport, 11 mi upstream from Wakulla River, and 14 mi upstream fro m mouth.

DRAINAGE AREA.--535 mi 2 including 240 mi 2 of Lake Miccosukee, which contributes at high stages to the St. Marks River.

PERIOD OF RECORD.--October 1956 to September 1976. October 1976 to September 1977 (gage heights only); October 1977 to Septembe r 1990; October 1990 to September 1991 (gage heights and peak discharge only); October 1991 to September 1994; July 1996 to current year.

REVISED RECORDS.--WSP 1905: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 3.53 ft above National Geodetic Vertical Datum of 1929.

REMARKS.--No estimated daily discharge. Records poor.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 852 571 452 402 391 404 660 489 405 580 566 433 2 836 566 446 398 392 408 656 488 405 613 619 433 3 820 557 441 395 392 414 629 485 401 615 640 437 4 809 552 438 395 392 431 617 482 397 641 651 443 5 796 546 435 395 392 424 616 481 394 616 765 431

6 790 544 431 395 390 416 605 475 391 598 1080 423 7 787 542 431 395 389 413 595 471 388 584 1350 459 8 772 540 431 397 386 412 586 467 386 564 1370 463 9 755 542 430 395 386 426 579 463 394 552 1490 424 10 749 533 430 395 388 441 575 461 394 560 1460 402

11 743 523 431 396 389 440 570 458 402 561 1310 388 12 730 517 432 397 389 446 564 455 495 552 1190 381 13 722 514 428 395 391 572 560 451 488 548 1090 370 14 716 511 428 395 392 538 555 446 570 539 1050 363 15 706 501 426 395 394 571 554 442 830 531 1090 354

16 697 496 429 395 398 613 547 439 881 522 1110 347 17 691 495 427 395 401 582 539 434 795 518 1050 340 18 681 489 421 395 396 580 527 428 697 516 968 332 19 670 487 419 398 392 579 525 423 624 516 924 326 20 663 483 412 397 392 581 525 419 577 514 853 320

21 658 478 411 394 393 564 521 417 553 505 785 319 22 652 473 407 391 400 539 516 415 542 498 730 316 23 640 470 403 387 404 526 513 408 558 496 680 314 24 632 471 400 386 403 515 510 406 571 550 635 321 25 626 515 397 384 404 509 507 405 572 561 591 325

26 614 489 394 383 404 504 505 403 561 544 559 319 27 607 482 392 380 402 493 502 400 553 533 534 314 28 601 473 408 380 402 486 498 398 548 528 507 310 29 592 466 408 380 --- 620 495 399 548 528 482 304 30 582 458 408 389 --- 705 490 399 551 529 461 297 31 577 --- 405 387 --- 669 --- 399 --- 533 445 ---

MEAN 702 509 421 392 394 510 555 439 529 550 872 367 MAX 852 571 452 402 404 705 660 489 881 641 1490 463 MIN 577 458 392 380 386 404 490 398 386 496 445 297 IN. 1.51 1.06 .91 .85 .77 1.10 1.16 .95 1.10 1.19 1.88 .77

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1957 - 2001, BY WATER YEAR (WY)

MEAN 651 549 579 630 738 874 845 670 677 716 771 734 MAX 1375 976 1470 1360 1680 2520 2760 1474 1465 1440 2220 1563 (WY) 1958 1960 1965 1987 1986 1991 1973 1965 1965 1994 1994 1957 MIN 351 339 358 345 335 338 378 371 355 360 370 336 (WY) 1969 1969 1991 1957 1957 1957 1968 1968 1968 1968 1968 1968

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1957 - 2001

ANNUAL MEAN 489 521 704 HIGHEST ANNUAL MEAN 1148 1994 LOWEST ANNUAL MEAN 403 1968 HIGHEST DAILY MEAN 1070 Sep 23 1490 Aug 9 4700 Apr 6 1973 LOWEST DAILY MEAN 348 Mar 25 297 Sep 30 297 Sep 30 2001 ANNUAL SEVEN-DAY MINIMUM 359 Mar 22 313 Sep 24 313 Sep 24 2001 MAXIMUM PEAK FLOW 1510 Aug 9 4750 Apr 7 1973 MAXIMUM PEAK STAGE 7.75 Aug 9 11.81 Apr 7 1973 INSTANTANEOUS LOW FLOW 292 Sep 30 292 Sep 30 2001 ANNUAL RUNOFF (INCHES) 12.45 13.23 17.88 10 PERCENT EXCEEDS 734 705 1070 50 PERCENT EXCEEDS 430 483 625 90 PERCENT EXCEEDS 379 389 40491 OCHLOCKONEE RIVER BASIN

02327033 LOST CREEK AT ARRAN, FL

LOCATION.--Lat 30 ° 11'17", long 84 ° 24'30" in SE 1 ⁄ 4 sec. 26, T. 3 S., R. 2 W., Wakulla County, Hydrologic Unit 03120001, on downstream side of bridge on State Highway 368, and 0.5 mi east of Arran.

DRAINAGE AREA.--70.4 mi 2

. PERIOD OF RECORD.--October 1928 to May 1981, miscellaneous discharge measurements only; October 1998 to current year.

GAGE.--Water-stage recorder.

REMARKS.--No estimated daily discharges. Records Fair.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 208 12 23 78 61 14 326 6.2 1.9 178 743 46 2 163 11 21 70 86 14 269 5.9 2.4 183 742 65 3 132 11 20 60 88 14 216 4.9 1.9 150 647 100 4 110 10 18 53 81 20 192 4.6 1.6 134 540 151 5 92 9.9 17 47 72 25 183 4.0 1.5 202 493 204

6 87 9.5 16 43 63 30 171 3.5 1.5 194 1420 215 7 164 9.3 16 40 54 32 152 3.2 1.5 183 2830 288 8 166 9.4 15 38 48 30 131 3.1 1.7 181 2590 343 9 129 9.5 15 36 42 29 112 3.0 1.6 174 2000 234 10 99 9.7 14 35 39 52 93 2.9 1.6 156 1510 181

11 80 9.4 14 34 37 80 77 2.8 2.6 267 1150 145 12 67 8.7 14 40 35 84 65 2.6 54 298 814 154 13 57 8.3 13 48 34 231 55 2.5 914 243 625 127 14 51 8.0 13 52 33 450 48 2.5 1420 181 582 102 15 45 7.7 21 51 32 554 52 2.2 748 142 509 81

16 40 7.4 25 48 30 799 55 2.3 446 110 434 65 17 35 8.7 35 44 29 710 48 2.6 292 84 372 53 18 32 9.1 37 41 27 555 40 2.2 198 66 346 44 19 29 9.5 36 38 25 528 34 1.7 150 55 349 38 20 27 11 35 43 23 593 29 1.9 121 53 304 33

21 24 11 33 54 21 851 24 2.4 124 55 251 30 22 22 10 31 61 20 878 20 2.0 128 64 202 34 23 20 9.8 29 59 21 676 17 1.8 229 56 163 36 24 19 9.8 27 56 19 510 15 1.7 507 82 133 37 25 17 26 25 50 18 397 14 1.6 477 274 109 54

26 16 33 24 44 17 322 12 1.5 349 395 89 60 27 15 32 22 40 16 260 11 1.5 245 395 74 57 28 15 30 31 36 15 210 9.8 1.5 176 330 62 49 29 14 27 60 33 --- 242 9.0 1.6 158 340 53 42 30 13 24 74 34 --- 344 7.2 1.6 144 323 46 35 31 12 --- 80 42 --- 368 --- 1.6 --- 289 41 ---

MEAN 64.5 13.4 27.5 46.7 38.8 319 82.9 2.69 230 188 652 103 MAX 208 33 80 78 88 878 326 6.2 1420 395 2830 343 MIN 12 7.4 13 33 15 14 7.2 1.5 1.5 53 41 30 IN. 1.06 .21 .45 .77 .57 5.23 1.31 .04 3.65 3.08 10.69 1.64

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 137 17.4 15.8 43.0 36.8 135 35.2 2.77 80.8 95.8 239 259 MAX 277 36.3 27.5 49.5 40.0 319 82.9 4.10 230 188 652 596 (WY) 1999 2000 2001 1999 1999 2001 2001 1999 2001 2001 2001 2000 MIN 64.5 2.67 2.56 32.8 31.9 32.1 4.11 1.52 1.27 1.20 10.5 78.4 (WY) 2001 1999 1999 2000 2000 2000 1999 2000 2000 2000 2000 1999

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 68.5 149 91.9 HIGHEST ANNUAL MEAN 149 2001 LOWEST ANNUAL MEAN 57.0 1999 HIGHEST DAILY MEAN 3960 Sep 23 2830 Aug 7 3960 Sep 23 2000 LOWEST DAILY MEAN .56 Aug 25 1.5 May 26 .56 Aug 25 2000 ANNUAL SEVEN-DAY MINIMUM .78 Aug 20 1.6 May 25 .78 Aug 20 2000 MAXIMUM PEAK FLOW 2930 Aug 7 4170 Sep 23 2000 MAXIMUM PEAK STAGE 15.85 Aug 7 18.19 Sep 23 2000 INSTANTANEOUS LOW FLOW 1.4 Jun 6 .47 Aug 25 2000 ANNUAL RUNOFF (INCHES) 13.25 28.71 17.74 10 PERCENT EXCEEDS 86 381 182 50 PERCENT EXCEEDS 13 44 20 90 PERCENT EXCEEDS 1.2 3.4 1.592 OCHLOCKONEE RIVER BASIN

02327100 SOPCHOPPY RIVER NEAR SOPCHOPPY, FL (Hydrologic bench-mark station)

LOCATION.--Lat 30 ° 07'45", long 84 ° 29'40" in NW 1 ⁄ 4 sec. 24, T. 4 S., R. 3 W., Wakulla County, Hydrologic Unit 03120003, Apalachicola National Forest, near left bank on downstream side of bridge on U.S. Forest Road 343, 4.7 mi north of Sopchoppy

, 5.2 mi upstream from Duval Branch, and 24 mi upstream from mouth.

DRAINAGE AREA.--102 mi 2

. PERIOD OF RECORD.--Water years 1961-64 (annual maximum); June 1964 to current year.

REVISED RECORDS.--WSP 1905, WRD FL-76-4: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929. Jan. 27, 1961 to June 3, 1964, nonrecording gage and crest-stage gage at same site at datum 9.63 ft higher.

REMARKS.--Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 309 4.5 11 85 81 15 519 5.2 3.1 422 1190 31 2 229 4.3 9.6 e74 104 17 417 4.5 3.6 341 1410 75 3 168 4.1 8.4 63 107 16 328 3.9 2.8 256 1390 154 4 125 4.0 7.5 57 100 30 284 3.5 2.4 209 1150 205 5 97 3.8 6.7 51 92 41 272 3.1 2.3 203 933 320

6 85 3.7 6.0 46 82 39 242 2.9 2.2 249 1550 364 7 162 3.7 5.5 42 71 34 207 2.7 2.1 320 3250 408 8 300 3.7 5.0 38 61 27 169 2.6 2.5 276 3140 418 9 280 4.0 4.7 36 53 29 136 2.5 3.0 212 2380 362 10 208 4.3 4.4 32 47 99 110 2.4 2.9 250 1590 327

11 151 4.2 4.2 30 44 136 90 2.4 4.8 676 1080 281 12 113 4.2 4.0 43 41 161 74 2.4 87 693 899 282 13 87 4.4 3.9 59 37 612 60 2.5 447 723 792 280 14 69 4.5 4.0 63 34 1000 48 2.3 781 605 712 234 15 54 4.3 7.2 61 31 1200 47 2.3 634 480 642 180

16 43 4.3 12 56 29 1450 57 2.2 413 365 569 132 17 34 4.5 18 50 26 1280 64 2.2 292 273 513 96 18 27 5.1 21 45 23 1070 55 2.0 221 204 407 72 19 22 5.5 17 41 20 989 46 2.0 172 165 362 53 20 18 6.4 17 55 17 1080 38 2.1 132 150 341 39

21 15 6.6 15 72 15 1410 31 2.6 133 133 304 31 22 13 6.4 14 74 14 1510 26 2.3 135 111 249 28 23 11 5.7 13 70 19 1250 21 2.2 489 86 197 26 24 9.5 5.8 12 63 17 923 18 2.0 544 130 153 36 25 8.4 19 11 56 16 704 15 2.0 523 324 119 112

26 7.4 25 9.8 49 15 586 13 1.9 424 361 94 140 27 6.7 22 8.7 44 14 474 11 1.8 329 359 75 134 28 6.1 21 19 39 12 369 8.9 1.9 253 319 59 109 29 5.5 17 72 35 --- 453 7.4 2.3 199 336 46 86 30 5.1 13 88 39 --- 602 6.1 2.7 301 312 35 67 31 4.7 --- 92 57 --- 587 --- 2.4 --- 391 28 ---

MEAN 86.2 7.63 17.1 52.4 43.6 587 114 2.57 218 320 828 169 MAX 309 25 92 85 107 1510 519 5.2 781 723 3250 418 MIN 4.7 3.7 3.9 30 12 15 6.1 1.8 2.1 86 28 26 MED 43 4.5 9.8 51 32 586 56 2.4 154 312 569 133 IN. .98 .08 .19 .59 .45 6.64 1.25 .03 2.39 3.62 9.36 1.85

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1964 - 2001, BY WATER YEAR (WY)

MEAN 118 59.2 145 252 288 304 174 63.1 137 244 309 226 MAX 783 470 843 849 753 957 1065 424 520 763 1005 1084 (WY) 1995 1986 1965 1991 1986 1991 1973 1991 1982 1975 1994 2000 MIN 1.86 1.58 2.87 11.1 22.4 27.6 8.81 1.70 1.31 3.06 6.14 4.76 (WY) 1994 1991 1992 1985 1989 2000 1966 1992 2000 1977 1990 1990

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1964 - 2001

ANNUAL MEAN 119 206 192 HIGHEST ANNUAL MEAN 334 1991 LOWEST ANNUAL MEAN 43.4 1968 HIGHEST DAILY MEAN 6610 Sep 23 3250 Aug 7 6610 Sep 23 2000 LOWEST DAILY MEAN .69 Jul 7 1.8 May 27 .69 Jul 7 2000 ANNUAL SEVEN-DAY MINIMUM .79 Jul 2 2.0 May 22 .79 Jul 2 2000 MAXIMUM PEAK FLOW 3490 Aug 7 7100 Sep 23 2000 MAXIMUM PEAK STAGE 30.38 Aug 7 34.47 Jul 31 1975 INSTANTANEOUS LOW FLOW 1.8 May 26 .63 Jul 7 2000 ANNUAL RUNOFF (INCHES) 15.89 27.42 25.56 10 PERCENT EXCEEDS 152 586 515 50 PERCENT EXCEEDS 12 51 61 90 PERCENT EXCEEDS 1.3 3.3 3.2

e Estimated93 OCHLOCKONEE RIVER BASIN

02328522 OCHLOCKONEE RIVER NEAR CONCORD, FL

LOCATION.--Lat 30 ° 40'08", long 84 ° 18'19", in SW 1 ⁄ 4 sec. 11, T. 3 N., R. 1 W., Gadsden County, Hydrologic Unit 03120003, near center of stream on downstream side of bridge on State Highway 12, and 3.7 mi east of Concord.

DRAINAGE AREA.--1002 mi 2

. PERIOD OF RECORD.--November 1920 to October 1990 (miscellaneous discharge measurements), October 1998 to current year.

GAGE.--Water-stage recorder.

REMARKS.--No estimated daily discharges. Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 786 58 199 720 642 242 2360 220 138 319 597 173 2 623 57 185 799 602 240 2590 202 121 305 481 167 3 492 55 172 871 587 236 2830 185 106 339 403 275 4 383 53 160 889 585 292 3110 171 91 360 398 472 5 308 52 149 845 581 537 3160 158 79 411 376 662

6 262 50 141 771 565 764 3170 146 72 496 461 789 7 239 48 133 694 544 885 3010 136 169 584 1120 846 8 223 47 126 625 518 1030 2650 126 193 697 1550 876 9 206 46 121 573 490 1210 2380 118 182 752 1810 873 10 211 46 121 550 461 1490 2140 111 225 705 1840 731

11 227 45 129 525 427 1740 1940 104 287 662 1820 581 12 221 45 143 524 399 1780 1780 98 833 627 1860 456 13 201 45 144 532 382 1760 1590 95 1290 584 1810 366 14 182 48 147 523 370 1700 1380 93 1550 534 1680 337 15 166 45 162 490 357 1800 1170 92 1560 515 1620 308

16 151 48 205 460 348 2270 977 87 1510 529 1610 269 17 137 53 213 436 337 4170 819 87 1500 529 1600 233 18 127 54 203 417 326 5800 701 81 1450 511 1540 207 19 117 59 198 404 323 6700 646 75 1380 451 1410 185 20 109 71 198 431 319 6620 651 71 1350 356 1210 167

21 102 111 200 571 307 6170 669 68 1280 281 1010 151 22 97 125 197 687 298 6030 655 66 1100 228 806 139 23 90 136 193 726 291 5520 592 69 996 193 621 134 24 85 154 190 780 293 4920 511 71 1070 180 483 145 25 80 171 187 829 285 4320 439 68 1030 281 385 168

26 77 191 185 852 269 3670 379 64 874 629 320 210 27 73 211 183 852 256 3020 331 61 731 822 274 191 28 69 215 198 831 247 2440 295 64 586 879 239 172 29 67 214 330 799 --- 2100 265 84 451 852 216 169 30 64 210 567 753 --- 2000 241 114 363 742 197 163 31 61 --- 666 687 --- 2180 --- 139 --- 653 184 ---

MEAN 201 92.1 205 660 407 2698 1448 107 752 516 966 354 MAX 786 215 666 889 642 6700 3170 220 1560 879 1860 876 MIN 61 45 121 404 247 236 241 61 72 180 184 134 IN. .23 .10 .24 .76 .42 3.11 1.61 .12 .84 .59 1.11 .39

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 882 133 171 515 554 1405 723 89.4 291 547 408 310 MAX 2357 230 205 702 841 2698 1448 107 752 1084 966 495 (WY) 1999 1999 2001 1999 1999 2001 2001 2001 2001 1999 2001 2000 MIN 89.0 78.5 109 184 407 677 178 67.8 35.7 40.1 30.0 80.4 (WY) 2000 2000 2000 2000 2001 1999 1999 1999 2000 2000 2000 1999

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 264 703 504 HIGHEST ANNUAL MEAN 703 2001 LOWEST ANNUAL MEAN 245 2000 HIGHEST DAILY MEAN 1690 Mar 25 6700 Mar 19 11500 Oct 2 1998 LOWEST DAILY MEAN 14 Aug 29 45 Nov 11 14 Aug 29 2000 ANNUAL SEVEN-DAY MINIMUM 15 Aug 26 46 Nov 9 15 Aug 26 2000 MAXIMUM PEAK FLOW 6800 Mar 19 11500 Oct 2 1998 MAXIMUM PEAK STAGE 37.10 Mar 19 39.69 Oct 2 1998 INSTANTANEOUS LOW FLOW 44 Nov 11 14 Aug 29 2000 ANNUAL RUNOFF (INCHES) 3.58 9.53 6.83 10 PERCENT EXCEEDS 740 1750 1110 50 PERCENT EXCEEDS 142 348 210 90 PERCENT EXCEEDS 26 76 4894 OCHLOCKONEE RIVER BASIN

02329000 OCHLOCKONEE RIVER NEAR HAVANA, FL

LOCATION.--Lat 30 ° 33'14", long 84 ° 23'03", in SE 1 ⁄ 4 sec. 24,T.2N.,R.2W., Leon County, Hydrologic Unit 03120003, on left bank 20ft downstream of downstream bridge on divided U.S. Highway 27, 0.8 mi upstream from Seaboard Air Line Railroad bridge, 4.0 mi downstream from Mill Creek, 5.0 mi southeast of Havana, and 94 mi upstream from mouth.

DRAINAGE AREA.--1,140 mi 2 , approximately. At site used prior to January 1929, 1,220 mi 2 , approximately.

PERIOD OF RECORD.--June 1926 to current year. June 1926 to December 1929 (published as "at Ochlockonee"). Records published for both sites December 1928 to December 1929.

REVISED RECORDS.--WSP 822: 1929 (M). WSP 1504: 1928. WSP 1905: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 59.36 ft above National Geodetic Vertical Datum of 1929. Prior to Jan. 1, 1930, nonrecording gage at site about 10 mi downstream at datum 9.36 ft lower. Dec. 12, 1928, to Nov. 17, 1963, nonrecording gage at site 100 ft upstream at present datum. Nov. 18, 1963 to Nov. 15, 1976, nonrecording gage at same site and datum.

REMARKS.--Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 738 71 218 587 673 298 2070 294 150 e460 541 228 2 654 69 210 635 628 292 2130 270 155 429 482 223 3 555 68 197 694 593 280 2240 249 141 405 386 277 4 469 66 184 750 574 341 2440 232 125 391 353 385 5 395 65 173 775 568 393 2750 215 110 390 335 490

6 338 64 164 755 560 532 2800 201 98 418 526 582 7 311 63 155 708 547 668 2770 186 93 467 936 654 8 275 61 147 657 528 766 2640 173 222 523 1030 693 9 249 61 142 603 508 875 2430 162 320 592 1120 717 10 231 61 144 559 488 1020 2250 152 321 641 1240 713

11 229 60 142 536 464 e1250 2090 143 357 669 1280 632 12 237 59 147 532 437 e1480 1940 135 1360 621 1300 530 13 231 59 155 527 415 1710 1760 128 1180 601 1330 439 14 214 62 159 527 400 1740 1530 120 1200 547 1290 375 15 197 63 164 516 388 1790 1320 116 1440 500 1210 341

16 181 62 181 491 377 1880 1130 113 1470 477 1130 309 17 165 66 213 466 366 2020 959 108 1390 477 1090 272 18 150 67 222 446 354 2800 820 105 1320 474 1080 241 19 137 71 218 434 344 4480 720 100 1260 461 1050 216 20 127 75 213 459 341 6170 667 96 1210 431 978 191

21 119 84 212 478 334 5950 653 93 1170 379 852 171 22 112 107 212 560 327 5440 654 89 1110 368 707 156 23 106 124 209 634 318 5200 638 88 1040 367 567 145 24 100 137 206 669 312 4790 592 89 948 364 443 143 25 95 168 204 706 312 4340 532 88 929 363 366 156

26 90 186 201 741 305 3830 474 85 895 343 349 163 27 85 201 199 762 291 3330 422 81 797 409 355 186 28 81 216 237 765 282 2830 381 82 692 541 352 174 29 78 221 303 754 --- 2510 348 87 587 584 353 157 30 75 221 379 744 --- 2320 318 101 497 580 317 147 31 73 --- 508 716 --- 2120 --- 131 --- 556 233 ---

MEAN 229 98.6 207 619 430 2369 1416 139 753 478 761 337 MAX 738 221 508 775 673 6170 2800 294 1470 669 1330 717 MIN 73 59 142 434 282 280 318 81 93 343 233 143 MED 181 68 201 634 394 1880 1220 116 846 467 707 256 IN. .23 .10 .21 .63 .39 2.40 1.39 .14 .74 .48 .77 .33

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1926 - 2001, BY WATER YEAR (WY)

MEAN 514 390 731 1308 1971 2279 1886 806 631 714 809 572 MAX 6892 3594 6057 4332 9355 7718 9368 4282 3867 3345 6098 4279 (WY) 1995 1948 1965 1993 1986 1984 1948 1964 1973 1991 1928 1935 MIN 22.0 26.5 37.0 65.5 116 167 173 60.6 37.6 42.5 34.1 26.8 (WY) 1955 1934 1934 1934 1957 1955 1927 1927 2000 2000 2000 1954

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1926 - 2001

ANNUAL MEAN 247 655 1046 HIGHEST ANNUAL MEAN 2854 1948 LOWEST ANNUAL MEAN 209 1968 HIGHEST DAILY MEAN 1390 Mar 26 6170 Mar 20 53100 Apr 4 1948 LOWEST DAILY MEAN 19 Aug 30 59 Nov 12 17 Oct 23 1954 ANNUAL SEVEN-DAY MINIMUM 22 Aug 25 60 Nov 8 17 Oct 22 1954 MAXIMUM PEAK FLOW 6440 Mar 20 55900 Apr 4 1948 MAXIMUM PEAK STAGE 26.38 Mar 20 35.08 Apr 4 1948 INSTANTANEOUS LOW FLOW 58 Nov 12 17 Oct 23 1954 ANNUAL RUNOFF (INCHES) 2.95 7.80 12.47 10 PERCENT EXCEEDS 619 1410 2560 50 PERCENT EXCEEDS 149 381 452 90 PERCENT EXCEEDS 33 93 84

e Estimated95 OCHLOCKONEE RIVER BASIN

02329000 OCHLOCKONEE RIVER NEAR HAVANA, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 16.71 11.65 13.25 15.87 16.36 13.92 21.93 14.05 12.76 --- 15.87 13.50 2 16.25 11.62 13.18 16.15 16.11 13.87 22.07 13.86 12.81 15.09 15.47 13.45 3 15.68 11.60 13.06 16.48 15.90 13.78 22.35 13.68 12.66 14.92 14.77 13.90 4 15.14 11.58 12.94 16.77 15.80 14.25 22.84 13.53 12.49 14.81 14.51 14.76 5 14.64 11.56 12.83 16.90 15.76 14.63 23.38 13.38 12.32 14.80 14.37 15.52

6 14.23 11.55 12.74 16.80 15.71 15.54 23.46 13.24 12.18 15.01 15.69 16.14 7 14.02 11.53 12.66 16.55 15.63 16.33 23.40 13.11 12.12 15.36 18.13 16.58 8 13.74 11.51 12.58 16.27 15.52 16.86 23.22 12.99 13.39 15.75 18.60 16.82 9 13.52 11.50 12.52 15.96 15.39 17.39 22.83 12.88 14.25 16.20 18.98 16.96 10 13.36 11.50 12.54 15.70 15.26 18.04 22.39 12.78 14.26 16.50 19.45 16.94

11 13.35 11.48 12.52 15.56 15.11 --- 21.97 12.68 14.54 16.67 19.62 16.45 12 13.42 11.47 12.57 15.55 14.93 --- 21.54 12.60 19.90 16.38 19.71 15.80 13 13.36 11.47 12.66 15.51 14.78 20.57 21.03 12.52 19.25 16.25 19.79 15.16 14 13.22 11.51 12.69 15.51 14.68 20.64 20.44 12.43 19.32 15.91 19.68 14.68 15 13.06 11.53 12.74 15.44 14.60 20.80 19.77 12.39 20.19 15.60 19.36 14.42

16 12.91 11.51 12.91 15.29 14.51 21.10 19.03 12.36 20.29 15.44 19.04 14.17 17 12.75 11.58 13.20 15.12 14.44 21.56 18.25 12.30 20.01 15.44 18.89 13.87 18 12.60 11.59 13.28 14.99 14.35 23.35 17.53 12.27 19.78 15.41 18.83 13.61 19 12.47 11.64 13.25 14.91 14.27 25.16 16.98 12.21 19.56 15.32 18.70 13.38 20 12.36 11.71 13.20 15.08 14.24 26.23 16.66 12.16 19.35 15.10 18.35 13.16

21 12.26 11.82 13.20 15.20 14.20 26.11 16.58 12.13 19.18 14.72 17.70 12.96 22 12.18 12.12 13.19 15.71 14.14 25.81 16.59 12.07 18.97 14.62 16.90 12.81 23 12.10 12.32 13.17 16.14 14.08 25.66 16.49 12.06 18.66 14.62 16.03 12.70 24 12.03 12.47 13.14 16.34 14.03 25.39 16.20 12.08 18.19 14.59 15.19 12.68 25 11.96 12.79 13.12 16.54 14.03 25.08 15.81 12.06 18.10 14.59 14.61 12.81

26 11.90 12.95 13.09 16.73 13.97 24.68 15.41 12.03 17.93 14.43 14.48 12.89 27 11.84 13.10 13.08 16.84 13.87 24.16 15.04 11.98 17.41 14.94 14.52 13.10 28 11.78 13.24 13.41 16.85 13.80 23.49 14.73 11.99 16.81 15.87 14.50 12.99 29 11.74 13.27 13.96 16.80 --- 23.01 14.47 12.05 16.17 16.15 14.51 12.82 30 11.70 13.28 14.52 16.74 --- 22.57 14.24 12.22 15.57 16.12 14.22 12.73 31 11.67 --- 15.39 16.59 --- 22.05 --- 12.56 --- 15.97 13.54 ---

MEAN 13.16 11.95 13.12 16.03 14.84 --- 19.22 12.60 16.61 --- 16.90 14.26 MAX 16.71 13.28 15.39 16.90 16.36 --- 23.46 14.05 20.29 --- 19.79 16.96 MIN 11.67 11.47 12.52 14.91 13.80 --- 14.24 11.98 12.12 --- 13.54 12.6896 OCHLOCKONEE RIVER BASIN

02329600 LITTLE RIVER NEAR MIDWAY, FL

LOCATION.--Lat 30 ° 30'44", long 84 ° 31'25", in SW 1 ⁄ 4 sec. 3, T.1N., R. 3W., Gadsen County, Hydrologic Unit 03120003, at bridge on State Highway 268, 0.5 mi upstream from Monroe Creek, 3.2 mi above mouth, and 3.7 mi west of Midway.

DRAINAGE AREA.--305 mi 2

. PERIOD OF RECORD.--Annual maximums, water years 1965 to 1985. October 1985 to current year.

GAGE.--Water-stage recorder and crest-stage. Datum of gage is National Geodetic Vertical Datum of 1929. Prior to Oct. 22, 1985, nonrecording and crest-stage gages at same site and datum.

REMARKS.--No estimated daily discharges. Records good, except those below 200 ft 3 /s, which are fair.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 28 28 48 272 215 153 488 20 11 97 253 23 2 28 27 63 221 182 220 302 21 11 152 241 54 3 28 26 70 197 116 211 235 22 10 166 67 169 4 26 26 76 153 87 398 304 22 10 103 29 259 5 25 23 81 139 47 533 672 22 10 36 120 393

6 29 23 86 108 67 413 1030 22 10 21 729 412 7 47 22 104 103 147 267 956 22 12 39 1360 335 8 85 22 111 108 85 214 398 21 10 82 918 250 9 66 23 117 115 112 204 259 21 105 74 613 253 10 29 22 191 110 119 214 228 21 118 65 312 114

11 23 22 180 107 138 207 176 20 330 170 273 35 12 25 21 103 174 134 167 104 19 3060 75 529 23 13 26 20 83 214 129 790 100 18 3180 106 703 21 14 27 21 83 210 132 939 96 16 2470 26 395 21 15 29 22 114 192 147 1120 82 15 1300 15 293 21

16 31 22 188 135 169 1670 48 13 316 20 275 18 17 32 38 208 113 155 2450 24 12 268 22 275 15 18 34 64 207 101 149 2540 22 12 224 30 252 16 19 36 76 139 106 147 1650 21 11 146 67 201 19 20 34 145 101 341 143 1690 20 11 311 92 107 20

21 34 171 89 433 149 1900 21 12 304 92 50 22 22 33 125 66 357 172 2150 22 12 466 26 32 22 23 31 113 39 257 186 1900 23 11 758 20 28 23 24 30 112 26 220 207 827 25 11 391 21 23 38 25 29 191 27 208 207 364 24 11 258 37 22 146

26 28 215 38 191 188 296 23 10 115 83 21 149 27 27 170 70 172 96 256 21 10 31 122 20 77 28 29 106 215 150 81 222 16 10 21 110 19 30 29 29 85 450 154 --- 352 16 10 16 107 17 19 30 28 59 504 192 --- 609 18 10 32 89 17 13 31 28 --- 409 217 --- 617 --- 11 --- 162 20 ---

MEAN 32.7 68.0 138 186 140 824 192 15.5 477 75.1 265 100 MAX 85 215 504 433 215 2540 1030 22 3180 170 1360 412 MIN 23 20 26 101 47 153 16 10 10 15 17 13 IN. .12 .25 .52 .70 .48 3.12 .70 .06 1.74 .28 1.00 .37

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1986 - 2001, BY WATER YEAR (WY)

MEAN 356 319 344 631 726 783 345 219 317 285 339 270 MAX 2542 1497 876 1694 2139 1791 756 1136 875 1003 1617 1249 (WY) 1995 1998 1986 1991 1986 1991 1994 1991 1989 1994 1994 1994 MIN 24.0 68.0 93.8 96.0 140 213 116 15.5 9.25 21.2 47.0 49.3 (WY) 1991 2001 1989 1989 2001 2000 1999 2001 2000 2000 2000 1990

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1986 - 2001

ANNUAL MEAN 101 210 410 HIGHEST ANNUAL MEAN 709 1991 LOWEST ANNUAL MEAN 106 2000 HIGHEST DAILY MEAN 1600 Apr 26 3180 Jun 13 30300 Oct 3 1994 LOWEST DAILY MEAN 4.3 Jun 12 10 May 26 4.3 Jun 12 2000 ANNUAL SEVEN-DAY MINIMUM 4.4 Jun 10 10 May 24 4.4 Jun 10 2000 MAXIMUM PEAK FLOW 4050 Jun 12 49200 Sep 22 1969 MAXIMUM PEAK STAGE 75.83 Jun 12 86.25 Sep 22 1969 INSTANTANEOUS LOW FLOW 9.7 Jun 6 3.8 Jun 14 2000 ANNUAL RUNOFF (INCHES) 4.51 9.35 18.27 10 PERCENT EXCEEDS 217 410 913 50 PERCENT EXCEEDS 48 89 205 90 PERCENT EXCEEDS 14 18 5697 OCHLOCKONEE RIVER BASIN

02330000 OCHLOCKONEE RIVER NEAR BLOXHAM, FL

LOCATION.--Lat 30 ° 22'59", long 84 ° 39'18", in NE 1 ⁄ 4 sec. 20, T. 1 S., R. 4 W., Leon County, Hydrologic Unit 03120003, on left bank at Old State Highway 20(Crooked Road), 3,000 ft downstream from C.H. Corn Hydroelectric Dam, 1.5 mi southwest of Bloxham, and 65 mi upstream from mouth.

DRAINAGE AREA.--1,700 mi 2 , approximately.

PERIOD OF RECORD.--June 1926 to current year. Low-flow records not equivalent prior to October 1, 1954, due to undetermined amount of seepage inflow.

REVISED RECORDS.--WSP 1002: 1940-42. WSP 1704: 1958-59. WSP 1905, WRD FL-76-4: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 24.69 ft above National Geodetic Vertical Datum of 1929. Prior to Apr. 9, 1930, nonrecording gage at site 2,700 ft upstream at datum 5.00 ft higher, Apr. 9, 1930 to Jan. 19, 1939, water-stage recorder at site 2,000 ft upstream at datum 5.00ft higher, Jan. 20, 1939 to Sept. 30, 1954, water-stage recorder at present site at datu m 5.00 ft higher, Oct. 1, 1954 to Sept. 30, 1985, water-stage recorder at present site and datum, Oct. 1, 1985 to Aug. 27, 1997, at site 2,000 ft upstream at present datum.

REMARKS.--No estimated daily discharges. Records fair, except those below 150 ft 3 /s, which are poor. Flow regulated since 1929 by C.H. Corn Hydroelectric Dam (formerly Jackson Bluff Dam) above station and storage in Lake Talquin (02329900). Since October 1981, the publication of adjusted values for storage has been discontinued since the difference between adjusted and the unadjusted values have been minimal. Maximum discharge, 89,400 ft 3 /s, Sept. 23, 1969, gage height, 29.2 ft, from floodmark; minimum discharge, since October 1954, 1.0 ft 3 /s, Nov. 1, 1957, caused by closure of breaks in earth embankment of C.H. Corn Hydroelectric Dam (indeterminate prior to October 1954).

EXTREMES OUTSIDE THE PERIOD OF RECORD.--Maximum stage since 1834, 32.64 ft, Sept. 30, 1957, from flood marks established by local resident, discharge not determined.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 1020 188 273 1350 1590 612 2860 178 189 216 1820 215 2 765 188 198 1290 1350 616 2890 194 189 1510 2630 302 3 722 189 195 1120 1130 621 2930 194 188 2040 2230 938 4 718 187 194 1100 1020 1510 2690 192 188 2300 1020 1540 5 705 187 193 1100 793 1690 2960 189 190 1860 2930 2600

6 616 189 191 1100 673 1410 2980 187 191 759 4100 2540 7 577 191 194 1100 803 1100 3540 190 192 167 6670 2090 8 578 191 207 1100 811 827 2840 214 192 202 4240 1880 9 574 194 208 1100 812 1290 2820 214 195 1310 3210 1350 10 560 192 513 1040 815 1730 2910 200 194 1750 2590 1400

11 220 195 937 874 815 1740 2900 197 3010 1910 2880 1390 12 195 198 900 870 813 1760 2610 198 7600 1700 2540 1220 13 185 192 615 867 790 2990 2110 197 7010 1740 2810 979 14 190 180 463 864 674 3460 1920 197 3710 1640 3020 759 15 194 179 209 860 666 4280 2060 196 3490 891 3020 642

16 194 180 192 928 667 5060 1850 184 3340 204 2760 600 17 195 186 188 1020 622 4530 1370 183 2580 200 2340 496 18 196 185 271 1020 591 4950 1130 183 1520 224 2330 220 19 197 187 1060 1030 592 5120 1110 184 1290 210 2410 200 20 197 186 767 1050 594 6610 771 187 1830 298 2390 202

21 198 184 720 1080 597 7160 663 187 2000 980 2090 209 22 199 181 648 1220 599 7370 657 189 2070 1220 1200 224 23 199 185 602 1320 598 7090 654 187 3120 712 1130 239 24 200 479 501 1110 599 6200 619 186 2320 676 1150 661 25 200 1300 192 1040 603 5070 505 187 1760 711 847 678

26 194 931 179 1040 605 4900 578 184 1620 690 749 545 27 185 638 196 1080 605 4350 649 186 1590 788 622 655 28 185 617 260 1130 608 4160 600 186 1590 973 566 613 29 186 614 1270 1140 --- 4500 181 188 884 1090 556 524 30 186 607 1470 1260 --- 4200 177 187 243 1190 276 497 31 188 --- 1480 1460 --- 3320 --- 186 --- 1500 200 ---

MEAN 352 317 500 1086 766 3556 1751 191 1816 1021 2172 880 MAX 1020 1300 1480 1460 1590 7370 3540 214 7600 2300 6670 2600 MIN 185 179 179 860 591 612 177 178 188 167 200 200 IN. .24 .21 .34 .74 .47 2.41 1.15 .13 1.19 .69 1.47 .58

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1926 - 2001, BY WATER YEAR (WY)

MEAN 1009 777 1327 2040 2844 3317 2791 1339 1173 1288 1470 1264 MAX 10550 4943 8913 5671 12290 9313 13240 4880 4942 4007 6835 7890 (WY) 1995 1948 1965 1993 1986 1984 1948 1964 1973 1991 1928 1969 MIN 50.0 52.5 82.6 222 243 296 327 172 73.5 66.3 116 120 (WY) 1955 1955 1959 1935 1957 1955 1999 1927 2000 2000 2000 1958

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1926 - 2001

ANNUAL MEAN 478 1204 1689 HIGHEST ANNUAL MEAN 4516 1948 LOWEST ANNUAL MEAN 315 1955 HIGHEST DAILY MEAN 3020 Sep 23 7600 Jun 12 73200 Sep 23 1969 LOWEST DAILY MEAN 42 Jul 15 167 Jul 7 .00 Sep 20 1929 ANNUAL SEVEN-DAY MINIMUM 43 Jul 15 183 Nov 14 2.6 Sep 26 1958 MAXIMUM PEAK FLOW 8050 Jun 12 89400 Sep 25 1969 MAXIMUM PEAK STAGE 17.88 Jun 12 29.20 Sep 23 1969 INSTANTANEOUS LOW FLOW 136 Jul 7 ANNUAL RUNOFF (INCHES) 3.82 9.62 13.50 10 PERCENT EXCEEDS 1270 2930 4160 50 PERCENT EXCEEDS 198 711 994 90 PERCENT EXCEEDS 58 187 15798 OCHLOCKONEE RIVER BASIN

02330100 TELOGIA CREEK NEAR BRISTOL, FL

LOCATION.--Lat 30 ° 25'35", long 84 ° 55'40", in NW 1 ⁄ 4 sec. 3, T. 1 S., R. 7 W., Liberty County, Hydrologic Unit 03120003, near left bank at downstream side of bridge on State Highway 20, 600 ft upstream from White Branch, 3.0 mi east of Bristol, and 33 mi upstream from mouth.

DRAINGAGE AREA.--126 mi 2

.
PERIOD OF RECORD.--March 1950 to September 1971, October 1974 to September 1979, October 1980 to current year.

REVISED RECORDS.--WSP 1504: 1950-51, 1953 (M), 1955-56.

GAGE.--Water-stage recorder. Datum of gage is 99.50 ft above National Geodetic Vertical Datum of 1929 (Florida Department of Transportation bench mark).

REMARKS.--No estimated daily discharges. Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 75 49 85 113 84 49 162 39 24 83 704 90 2 71 49 82 93 85 77 126 37 26 87 828 156 3 67 49 80 84 80 88 106 36 26 82 402 240 4 63 49 77 78 70 90 112 36 24 78 212 504 5 62 49 75 76 65 142 154 36 24 158 156 821

6 62 49 74 73 63 132 169 32 23 228 1130 543 7 75 50 75 70 60 80 124 30 21 123 2770 569 8 83 50 72 69 58 66 103 30 22 89 1340 921 9 79 52 72 74 56 60 93 29 29 78 918 414 10 69 59 77 77 57 71 86 28 61 68 559 197

11 64 63 107 71 66 97 80 28 103 106 516 153 12 61 62 105 84 73 89 75 28 1140 167 748 135 13 59 59 92 107 66 228 71 27 1800 145 756 120 14 57 60 87 97 63 418 69 26 808 115 544 109 15 56 60 105 83 60 513 80 25 412 87 517 107

16 54 63 126 75 59 477 88 24 245 78 367 100 17 53 77 109 70 57 727 96 23 211 66 316 91 18 52 95 96 67 55 405 79 23 152 56 1350 86 19 51 106 89 67 53 325 67 22 113 54 703 82 20 52 130 90 103 51 580 61 24 94 55 407 80

21 51 139 93 151 49 969 57 28 170 57 249 80 22 51 110 88 127 50 825 54 34 208 63 182 84 23 50 87 84 94 51 374 51 35 145 55 150 158 24 50 82 81 82 50 194 49 30 189 61 132 185 25 49 157 78 75 48 148 47 28 156 110 115 259

26 49 192 76 70 48 131 46 25 98 210 103 241 27 49 177 75 67 47 117 45 23 73 210 100 155 28 50 131 105 64 47 107 44 22 66 210 96 121 29 49 104 197 63 --- 140 42 22 79 356 88 102 30 47 92 276 65 --- 240 40 26 76 334 85 91 31 48 --- 191 76 --- 258 --- 25 --- 402 84 ---

MEAN 58.3 85.0 101 82.7 59.7 265 82.5 28.4 221 131 536 233 MAX 83 192 276 151 85 969 169 39 1800 402 2770 921 MIN 47 49 72 63 47 49 40 22 21 54 84 80 IN. .53 .75 .92 .76 .49 2.43 .73 .26 1.95 1.20 4.91 2.06

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1950 - 2001, BY WATER YEAR (WY)

MEAN 178 161 198 258 296 329 231 159 170 207 220 213 MAX 867 642 749 766 812 1100 615 788 605 510 726 1268 (WY) 1995 1998 1965 1991 1986 1991 1958 1991 1965 1956 1994 1969 MIN 35.4 46.9 69.3 71.1 59.7 45.1 61.0 28.4 28.6 45.9 47.0 38.4 (WY) 1955 1991 1991 1989 2001 1955 1999 2001 2000 2000 1954 1954

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1950 - 2001

ANNUAL MEAN 74.5 158 218 HIGHEST ANNUAL MEAN 478 1965 LOWEST ANNUAL MEAN 78.9 2000 HIGHEST DAILY MEAN 671 Sep 24 2770 Aug 7 16600 Sep 22 1969 LOWEST DAILY MEAN 22 Jun 10 21 Jun 7 21 Jun 7 2001 ANNUAL SEVEN-DAY MINIMUM 23 Jun 7 24 Jun 2 23 Jun 7 2000 MAXIMUM PEAK FLOW 3240 Aug 7 20600 Sep 22 1969 MAXIMUM PEAK STAGE 8.61 Aug 7 16.65 Sep 22 1969 INSTANTANEOUS LOW FLOW 21 May 29 21 Jun 12 2000 ANNUAL RUNOFF (INCHES) 8.05 17.01 23.48 10 PERCENT EXCEEDS 124 370 432 50 PERCENT EXCEEDS 62 80 129 90 PERCENT EXCEEDS 28 36 6099 OCHLOCKONEE RIVER BASIN

02330150 OCHLOCKONEE RIVER NEAR SMITH CREEK, FL

LOCATION.--Lat 30 ° 10'35", long 84 ° 40'05", in NE 1 ⁄ 4 sec. 31, T. 3 S., R. 4 W., Wakulla County, Hydrologic Unit 03120002, at bridge on County Road 368 and Forest Road FH-13, 1.3 mi upstream from Smith Creek, 2.0 mi southwest of community of Smith Creek, and 39 mi upstream from mouth.

DRAINAGE AREA.--2,080 mi 2

.
PERIOD OF RECORD.--November 1964 to November 1992 (annual peak stage); October 1996 to current year.

GAGE.--Water-stage recorder. Datum of gage is undetermined. Prior to Nov. 29, 1972, crest-stage gage at NGVD of 1929.

EXTREMES FOR PERIOD OF RECORD.--Maximum gage-height, 29.75 ft above NGVD of 1929, Sept. 25, 1969, discharge not determined.

REMARKS.--Records fair, except for estimated daily discharges, which are poor.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 e1200 255 652 e3000 e1700 517 e4600 353 273 1010 3190 569 2 e1100 254 520 e2450 e1800 517 e4000 334 280 686 4210 796 3 e900 253 e430 e2350 e1600 517 e3350 327 270 1430 5100 1320 4 e880 253 e420 e2100 e1300 574 e2600 322 264 2460 5040 2200 5 e840 252 e415 e2000 e1150 1100 e2100 317 260 3110 4370 3190

6 e800 250 e410 e1900 e840 e1900 e2300 311 256 3270 7680 4010 7 e760 250 e405 e1890 e675 e2100 e2500 306 258 2540 17800 4580 8 e730 249 e410 e1880 e695 e1500 e2600 304 259 1490 15600 4150 9 709 250 e420 e1870 700 e1100 e2200 310 263 992 11200 4050 10 687 255 e460 e1860 698 e1700 e1900 312 265 1480 8450 3410

11 657 257 e1200 e1700 697 e2250 e1700 306 321 2620 6450 2980 12 501 262 e2000 e1400 698 e2300 e1400 300 1960 3270 6170 3070 13 379 266 e1900 e1300 698 e3000 e1200 304 5620 3330 6090 2730 14 339 270 e1300 e1290 689 e4000 e1100 303 10000 3140 5710 2220 15 320 265 e1000 e1280 652 e4600 e1000 294 7760 2940 5480 1720

16 312 262 e465 e1270 623 e5600 e1100 288 6290 2380 5310 1320 17 304 272 e415 e1350 609 e6700 e1200 280 5630 1370 5000 1080 18 299 279 e410 e1400 584 e6100 e1250 272 4700 701 4510 797 19 295 297 e600 e1420 555 e6600 e1100 267 3410 562 4170 595 20 291 311 e2300 e1450 540 e7100 e950 267 2430 481 4080 486

21 288 318 e1700 e1480 533 e8900 e850 270 2300 476 4080 442 22 284 328 e1550 e1500 532 e9500 e750 271 2490 751 4010 426 23 281 329 e1400 e1600 531 e8700 e700 271 3120 1260 3210 437 24 279 334 e1300 e1700 525 e8000 e630 270 3730 1630 2430 550 25 276 485 e1100 e1400 520 e7000 e570 273 3900 2930 2030 796

26 274 917 e420 e1300 517 e6000 e540 273 3210 3380 1650 1180 27 269 1160 e390 e1350 514 e5000 e500 267 2600 2960 1310 1190 28 262 917 e425 e1400 511 e4500 e455 262 2290 2520 1030 1190 29 258 704 e560 e1450 --- e4000 e420 259 2130 2390 755 1160 30 256 673 e2500 e1500 --- e4250 e385 263 1730 2600 666 1020 31 255 --- e2900 e1550 --- e4500 --- 274 --- 2690 573 ---

MEAN 493 381 980 1658 774 4198 1532 291 2609 2027 5076 1789 MAX 1200 1160 2900 3000 1800 9500 4600 353 10000 3380 17800 4580 MIN 255 249 390 1270 511 517 385 259 256 476 573 426 IN. .27 .20 .54 .92 .39 2.33 .82 .16 1.40 1.12 2.81 .96

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1996 - 2001, BY WATER YEAR (WY)

MEAN 1946 1363 1578 1856 2242 3882 1294 725 989 1215 1640 1205 MAX 5932 4505 3954 3655 4510 10090 1879 1956 2609 2027 5076 2619 (WY) 1999 1998 1998 1998 1998 1998 1998 1997 2001 2001 2001 1998 MIN 480 381 492 573 774 1277 614 291 156 181 243 353 (WY) 2000 2001 2000 2000 2001 2000 1999 2001 2000 2000 2000 1997

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1996 - 2001

ANNUAL MEAN 623 1829 1665 HIGHEST ANNUAL MEAN 2798 1998 LOWEST ANNUAL MEAN 591 2000 HIGHEST DAILY MEAN 3300 Sep 24 17800 Aug 7 31800 Oct 2 1998 LOWEST DAILY MEAN 128 Jul 22 249 Nov 8 128 Jul 22 2000 ANNUAL SEVEN-DAY MINIMUM 135 Jun 11 251 Nov 3 135 Jun 11 2000 MAXIMUM PEAK FLOW 18700 Aug 7 33000 Oct 2 1998 MAXIMUM PEAK STAGE 16.37 Aug 7 18.30 Oct 2 1998 INSTANTANEOUS LOW FLOW 248 Nov 8 125 Jul 22 2000 ANNUAL RUNOFF (INCHES) 4.08 11.94 10.88 10 PERCENT EXCEEDS 1450 4500 3810 50 PERCENT EXCEEDS 400 1100 973 90 PERCENT EXCEEDS 160 270 274

e Estimated100 CARRABELLE RIVER BASIN

02330400 NEW RIVER NEAR SUMATRA, FL

LOCATION.--Lat 30 ° 02'19", long 84 ° 50'38", in SE 1 ⁄ 4 sec. 16, T. 5 S., R. 6 W., Liberty County, Hydrologic Unit 03130013, on left bank 1,000 ft downstream from closed Owens bridge and dead ends of Forest Road 125 at river, 1.8 mi downstream from Cat Branch, 4.6 mi west of Tate Fire Tower, and 8.2 mi east of Sumatra.

DRAINAGE AREA.--157 mi 2

. PERIOD OF RECORD.-November 1964 to October 1986 (annual maximum discharge and gage-height), December 1996 to current year.

GAGE.--Water-stage recorder. Datum of gage is NGVD of 1929; from USGS Benchmark "TT 24 S"; elevation, 25.587 ft above NGVD of 1929.

REMARKS.--Records good.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 6,670 ft 3 /s, Sept. 23, 1969, gage height 27.38 ft.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 839 2.0 53 111 129 20 692 1.9 .96 542 1110 80 2 701 1.9 43 116 136 23 660 1.7 1.0 594 1100 89 3 584 1.8 35 111 147 17 616 1.4 .85 633 1080 120 4 479 1.7 29 103 152 54 567 1.2 .72 637 1050 163 5 376 1.6 23 94 147 72 513 1.0 .64 613 1080 285

6 277 1.6 20 86 137 62 454 .89 .55 588 2280 434 7 229 1.5 17 76 125 70 395 .74 .48 544 4790 540 8 188 1.5 15 71 112 67 337 .64 .40 498 5370 622 9 155 1.6 13 64 100 63 282 .60 .47 502 e4370 649 10 134 1.7 16 54 91 89 232 .54 .75 511 e3680 625

11 116 1.5 20 50 85 98 191 .52 16 513 3220 571 12 95 1.5 17 88 74 148 158 .45 310 512 2700 507 13 75 1.5 19 91 66 376 130 .41 563 558 2220 435 14 59 1.6 28 92 61 502 106 .28 730 649 1840 372 15 45 1.5 47 105 56 737 85 .13 761 940 1550 324

16 34 1.5 47 107 52 996 67 .03 708 1070 1300 271 17 26 1.6 63 102 47 1070 58 .00 630 994 1120 226 18 20 1.5 60 94 38 1100 65 .00 547 867 1000 190 19 15 1.8 52 94 33 1080 59 .00 493 770 962 160 20 12 2.2 46 147 28 1250 44 .00 488 678 873 134

21 8.9 1.9 39 142 25 1460 31 .00 468 595 795 122 22 6.7 1.8 38 145 21 1600 22 .00 436 542 715 93 23 5.1 1.8 36 159 19 1570 16 .00 473 490 634 79 24 3.8 3.4 31 160 16 1430 12 .00 562 505 555 99 25 3.0 76 28 152 15 1280 8.9 .00 638 665 475 119

26 2.7 81 25 139 17 1110 7.5 .00 676 852 389 101 27 2.5 53 22 127 16 946 4.9 .00 658 1280 296 118 28 2.4 68 46 115 12 820 3.2 .00 613 1420 217 136 29 2.3 74 75 103 --- 777 2.6 .00 557 1350 163 135 30 2.1 65 69 112 --- 747 2.1 .31 526 1220 127 117 31 2.0 --- 91 125 --- 714 --- .96 --- 1140 100 ---

MEAN 145 15.3 37.5 108 69.9 656 194 .44 362 751 1521 264 MAX 839 81 91 160 152 1600 692 1.9 761 1420 5370 649 MIN 2.0 1.5 13 50 12 17 2.1 .00 .40 490 100 79 IN. 1.07 .11 .28 .79 .46 4.82 1.38 .00 2.57 5.51 11.17 1.88

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1997 - 2001, BY WATER YEAR (WY)

MEAN 398 75.6 26.3 112 82.9 291 81.5 124 143 316 555 449 MAX 865 202 37.5 152 121 656 194 359 362 751 1521 845 (WY) 1999 2000 2001 1999 1999 2001 2001 1997 2001 2001 2001 1998 MIN 145 9.72 14.3 75.7 58.8 56.3 9.19 .001 .080 .49 103 73.2 (WY) 2001 1999 1999 2000 2000 2000 1999 2000 2000 2000 2000 1999

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1997 - 2001

ANNUAL MEAN 95.2 347 219 HIGHEST ANNUAL MEAN 347 2001 LOWEST ANNUAL MEAN 113 2000 HIGHEST DAILY MEAN 2440 Sep 25 5370 Aug 8 5370 Aug 8 2001 LOWEST DAILY MEAN .00 May 2 .00 May 17 .00 Jun 5 1998 ANNUAL SEVEN-DAY MINIMUM .00 May 2 .00 May 17 .00 Jun 12 1998 MAXIMUM PEAK FLOW 5430 Aug 8 5430 Aug 8 2001 MAXIMUM PEAK STAGE 26.31 Aug 8 26.31 Aug 8 2001 INSTANTANEOUS LOW FLOW .00 May 16 .00 Sep 11 1997 ANNUAL RUNOFF (INCHES) 8.25 30.05 18.92 10 PERCENT EXCEEDS 178 975 662 50 PERCENT EXCEEDS 16 94 82 90 PERCENT EXCEEDS .00 1.0 .39

e Estimated101 APALACHICOLA RIVER BASIN

02357150 SPRING CREEK NEAR REYNOLDSVILLE, GA

LOCATION.--Lat 30 ° 54'14", long 84 ° 44'57", Decatur County, Hydrologic Unit 03130010, on right bank, 1 mi upstream of Smith Landing, and 3 mi north-northeast of Reynoldsville.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD.--October 1998 to current year.

GAGE.--Water-stage and velocity recorder.

REMARKS.--No estimated daily discharges. Records good below 2,000 ft 3 /s, and fair above.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 129 137 165 251 294 267 1460 580 324 430 249 199 2 129 141 173 287 285 275 1450 562 315 429 232 199 3 116 130 177 494 297 292 1380 534 306 421 244 205 4 124 133 163 569 317 326 1410 525 305 420 242 194 5 139 143 156 579 330 342 1570 516 280 414 253 191

6 148 152 158 478 330 313 1870 506 288 407 238 197 7 129 153 152 337 331 415 2360 490 281 403 229 197 8 124 146 152 321 323 590 2650 462 287 395 234 193 9 132 153 173 287 319 768 2540 455 280 382 213 188 10 137 129 179 279 321 796 2170 434 301 358 248 200

11 137 136 171 306 305 690 1810 420 324 353 251 188 12 141 140 166 311 305 606 1570 413 392 341 262 183 13 137 141 162 297 294 595 1410 419 439 339 265 187 14 138 139 167 308 302 708 1290 404 463 333 269 184 15 147 143 167 311 310 906 1180 371 461 332 257 168

16 146 146 172 290 315 1220 1130 368 479 315 271 170 17 141 145 165 286 302 1580 1120 368 495 296 267 175 18 147 162 180 287 280 1750 1060 353 479 281 277 174 19 148 155 167 304 301 1800 992 338 473 277 257 188 20 140 144 172 264 307 1750 927 333 454 281 247 179

21 129 147 185 263 316 1920 876 349 429 264 228 181 22 137 155 180 290 305 2380 822 373 438 252 218 170 23 133 149 185 300 277 2870 781 362 447 243 223 182 24 132 140 206 313 297 3040 759 346 452 254 212 187 25 132 144 199 311 304 2850 723 339 450 259 201 161

26 139 153 187 307 294 2340 710 339 445 235 222 166 27 136 150 177 315 279 1960 697 332 428 243 207 162 28 133 159 206 317 276 1710 663 341 428 241 207 175 29 139 158 184 299 --- 1520 639 328 411 237 199 170 30 136 155 177 305 --- 1470 598 316 414 239 205 163 31 139 --- 203 299 --- 1440 --- 313 --- 259 206 ---

MEAN 136 146 175 328 304 1274 1287 406 392 320 237 183 MAX 148 162 206 579 331 3040 2650 580 495 430 277 205 MIN 116 129 152 251 276 267 598 313 280 235 199 161

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 570 308 289 451 520 791 695 291 235 317 208 165 MAX 1417 618 498 780 868 1274 1287 406 392 511 289 197 (WY) 1999 1999 1999 1999 1999 2001 2001 2001 2001 1999 1999 1999 MIN 136 146 175 244 304 438 361 202 121 121 97.1 114 (WY) 2001 2001 2001 2000 2001 2000 2000 2000 2000 2000 2000 2000

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 212 433 403 HIGHEST ANNUAL MEAN 561 1999 LOWEST ANNUAL MEAN 216 2000 HIGHEST DAILY MEAN 533 Feb 14 3040 Mar 24 4260 Oct 3 1998 LOWEST DAILY MEAN 45 Sep 13 116 Oct 3 45 Sep 13 2000 ANNUAL SEVEN-DAY MINIMUM 73 Aug 18 130 Oct 2 73 Aug 18 2000 MAXIMUM PEAK FLOW 3360 Mar 23 4470 Oct 3 1998 MAXIMUM PEAK STAGE 80.39 Mar 23 81.82 Oct 3 1998 10 PERCENT EXCEEDS 416 914 723 50 PERCENT EXCEEDS 155 287 286 90 PERCENT EXCEEDS 109 142 129102 APALACHICOLA RIVER BASIN

02358000 APALACHICOLA RIVER AT CHATTAHOOCHEE, FL

LOCATION.--Lat 30 ° 42'03", long 84 ° 51'33", in NW 1 ⁄ 4 sec. 32, T.4 N., R.6 W., Jackson County, Hydrologic Unit 03130011, on downstream side of abandoned bridge downstream of U.S. Highway 90, 0.6 mi downstream from Jim Woodruff Dam, 0.6 mi upstream from Mosquito Creek, 1.0 mi west of Chattahoochee, and 106 mi upstream from mouth.

DRAINAGE AREA.--17,200 mi 2 , approximately.

PERIOD OF RECORD.--October 1928 to current year. Monthly discharge only for some periods, published in WSP 1304. Prior to October 1939, published as "near River Junction." Gage-height records collected at site 0.9 mi downstream October 1919 to September 1925, and at site approximately 100 ft downstream October 1925 to December 1958 are contained in reports of National Weather Service.

REVISED RECORDS.--WSP 1906: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (National Weather Service bench mark). Prior to Dec. 16, 1939, water-stage recorder at site 0.9 mi downstream at datum 44.85 ft higher. Dec. 16, 1939 to June 25, 1952, water-stage recorder, June 26, 1952 to June 2, 1954, nonrecording gage, and June 3, 1954 to Oct. 14, 1958, water-stage recorder, at site approximately 100 ft downstream at datum 45.58 ft. Oct. 15, 1958 to Sept. 30, 1987, water-stage recorder a t datum 40.58 ft.

REMARKS.--Records good. Flow regulated by Lake Seminole Reservoir (02357500) 0.6 mi upstream since Feb. 4, 1957, Walter F. George Lake (02343240) since 1962, Bartlett's Ferry Reservoir (02341000) since 1926, West Point Lake (02339400) since Octobe r 1974, and Lake Sidney Lanier Reservoir (02334400) since 1956.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 5640 5810 8000 13200 14200 13800 27800 12800 9810 17500 12700 7950 2 5670 5760 8230 13200 14100 14700 27300 12700 9960 16300 11200 7890 3 5670 5760 7840 13500 14200 16400 27700 11300 10800 15400 11000 7980 4 5660 5770 7300 16300 14100 50700 49600 12200 13300 15400 11100 8010 5 5740 5700 7260 16500 14100 77400 75500 13400 15700 16300 10900 8160

6 5620 5720 7260 14900 14300 81400 85700 13000 16800 17000 10600 7740 7 5590 5710 7320 14800 14500 82600 76300 11400 16900 15400 9290 7840 8 5550 5790 7310 14100 13400 59800 59000 10900 17000 17200 9020 7490 9 5540 5740 7320 11900 11200 51300 48100 10800 17100 15900 8890 7230 10 5570 5800 7340 11400 10700 46300 44900 10900 e20200 12900 9940 7190

11 5630 5790 7120 12800 9140 41400 37700 10500 e26400 13300 10900 7230 12 5750 5720 6860 12800 8670 36800 32600 10100 37100 14800 11100 8410 13 5710 5740 11200 12900 8860 41900 30600 9550 36000 13500 11000 9390 14 5630 5650 17200 12800 9060 50500 24000 8790 32100 10900 10200 8300 15 5620 5620 18900 12800 9060 53000 23200 8320 26400 10700 9890 7330

16 5620 5700 18200 11800 8950 58800 22900 7940 25600 10300 10900 7030 17 5670 5720 16200 11000 8990 75000 21900 7990 25700 8950 11100 6890 18 5690 5730 14600 11100 8890 79500 20700 8110 24600 8270 10700 6910 19 5660 5680 13900 11100 9170 75000 20400 8040 22900 7640 9020 6860 20 5740 5760 12100 11200 10100 68500 18600 11100 19300 7110 8070 6740

21 5710 6690 10600 14400 11000 75200 16200 17500 16900 7080 8300 6300 22 5730 7980 9220 19000 11100 93600 15000 20900 15100 7020 8290 6220 23 5680 7700 9110 21700 12200 98600 14800 19700 14900 6880 8250 6200 24 5620 6840 9150 21500 15000 85100 15100 16000 13900 6050 8170 6180 25 5640 6980 9200 20100 15300 71000 15600 12600 10800 7100 8340 6310

26 5620 7010 8980 19200 15300 61800 15600 11300 10800 7000 8240 6240 27 5690 7640 9150 18100 15300 54900 15400 10700 10800 7010 8200 6330 28 5650 9070 9320 17700 14800 47100 15600 9970 11400 7090 8070 6360 29 5680 7990 9440 15200 --- 45000 14600 9940 13100 7130 8020 6230 30 5740 8250 10700 14200 --- 36500 13500 9960 16600 7190 7880 6240 31 5690 --- 13000 14200 --- 29300 --- 10000 --- 11400 7850 ---

MEAN 5659 6361 10300 14690 11990 57190 30860 11560 18600 11150 9585 7173 MAX 5750 9070 18900 21700 15300 98600 85700 20900 37100 17500 12700 9390 MIN 5540 5620 6860 11000 8670 13800 13500 7940 9810 6050 7850 6180 MED 5660 5760 9150 14100 11700 54900 23000 10900 16800 10700 9290 7110 IN. .38 .41 .69 .98 .73 3.83 2.00 .78 1.21 .75 .64 .47

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1929 - 2001, BY WATER YEAR (WY)

MEAN 12540 13310 20260 27860 33830 41200 34230 21730 16470 16750 14930 12120 MAX 38500 31790 70390 62470 67310 171600 80700 53260 39460 87780 31950 25440 (WY) 1965 1993 1949 1936 1998 1929 1944 1964 1973 1994 1994 1994 MIN 5319 5524 7576 7262 10420 12780 10880 8413 4826 5117 4750 5889 (WY) 1955 1932 2000 1956 1989 1955 1999 2000 2000 2000 1988 2000

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1929 - 2001

ANNUAL MEAN 9341 16300 22050 HIGHEST ANNUAL MEAN 35680 1929 LOWEST ANNUAL MEAN 9107 2000 HIGHEST DAILY MEAN 35100 Apr 6 98600 Mar 23 291000 Mar 20 1929 LOWEST DAILY MEAN 4530 Jul 2 5540 Oct 9 3900 Nov 15 1987 ANNUAL SEVEN-DAY MINIMUM 4580 Jun 28 5610 Oct 5 4530 Aug 10 1988 MAXIMUM PEAK FLOW 100000 Mar 23 293000 Mar 20 1929 MAXIMUM PEAK STAGE 64.88 Mar 23 79.55 Mar 20 1929 INSTANTANEOUS LOW FLOW 5250 Oct 16 2570 Aug 6 1986 ANNUAL RUNOFF (INCHES) 7.39 12.87 17.42 10 PERCENT EXCEEDS 18900 36200 43600 50 PERCENT EXCEEDS 5970 10900 16000 90 PERCENT EXCEEDS 5150 5730 8660

e Estimated103 APALACHICOLA RIVER BASIN

02358000 APALACHICOLA RIVER AT CHATTAHOOCHEE, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 39.48 39.59 40.89 43.54 44.03 43.80 49.55 43.36 41.87 45.47 43.31 40.86 2 39.50 39.56 41.02 43.57 43.97 44.27 49.37 43.30 41.95 44.97 42.60 40.82 3 39.50 39.56 40.79 43.71 44.01 44.98 49.48 42.65 42.36 44.56 42.49 40.88 4 39.49 39.56 40.49 44.97 43.97 56.46 56.44 43.07 43.60 44.58 42.51 40.89 5 39.54 39.52 40.47 45.06 43.96 61.60 61.28 43.62 44.67 44.97 42.45 40.98

6 39.47 39.53 40.46 44.32 44.08 62.21 62.84 43.46 45.18 45.27 42.27 40.74 7 39.45 39.53 40.50 44.31 44.14 62.39 61.43 42.70 45.23 44.57 41.59 40.79 8 39.42 39.57 40.49 43.96 43.64 58.68 58.51 42.41 45.26 45.36 41.45 40.59 9 39.42 39.55 40.50 42.94 42.57 57.10 56.23 42.39 45.32 44.79 41.38 40.45 10 39.44 39.58 40.51 42.66 42.31 55.68 55.23 42.42 --- 43.42 41.93 40.42

11 39.47 39.57 40.38 43.37 41.51 54.14 52.94 42.25 --- 43.59 42.45 40.44 12 39.55 39.53 40.23 43.38 41.26 52.65 51.23 42.02 52.77 44.29 42.51 41.11 13 39.53 39.55 42.48 43.39 41.36 54.28 50.52 41.73 52.40 43.67 42.49 41.65 14 39.48 39.49 45.34 43.38 41.47 56.93 48.12 41.32 51.04 42.42 42.08 41.05 15 39.47 39.47 46.06 43.35 41.47 57.45 47.81 41.06 49.03 42.33 41.90 40.50

16 39.47 39.52 45.78 42.87 41.41 58.49 47.68 40.85 48.71 42.12 42.43 40.33 17 39.50 39.53 44.94 42.49 41.43 61.22 47.29 40.88 48.76 41.41 42.53 40.25 18 39.51 39.54 44.20 42.52 41.38 61.94 46.81 40.95 48.35 41.04 42.35 40.26 19 39.50 39.51 43.87 42.52 41.53 61.22 46.69 40.91 47.66 40.68 41.44 40.23 20 39.54 39.55 43.03 42.56 42.00 60.19 45.96 42.49 46.23 40.38 40.92 40.16

21 39.52 40.12 42.28 44.07 42.49 61.24 44.93 45.47 45.21 40.36 41.05 39.89 22 39.54 40.88 41.55 46.10 42.52 63.96 44.39 46.90 44.41 40.32 41.05 39.84 23 39.51 40.72 41.49 47.21 43.04 64.64 44.28 46.39 44.35 40.24 41.03 39.83 24 39.47 40.22 41.52 47.12 44.36 62.74 44.41 44.81 43.85 39.74 40.98 39.82 25 39.48 40.30 41.55 46.57 44.50 60.58 44.64 43.28 42.39 40.37 41.07 39.90

26 39.47 40.32 41.43 46.20 44.50 59.05 44.65 42.65 42.36 40.31 41.02 39.85 27 39.51 40.67 41.52 45.76 44.52 57.76 44.57 42.33 42.40 40.32 41.00 39.91 28 39.48 41.47 41.61 45.55 44.28 55.90 44.64 41.95 42.69 40.36 40.92 39.93 29 39.51 40.88 41.67 44.46 --- 55.26 44.21 41.94 43.50 40.39 40.90 39.85 30 39.54 41.02 42.31 44.03 --- 52.55 43.71 41.95 45.09 40.42 40.82 39.86 31 39.51 --- 43.46 44.00 --- 50.08 --- 41.98 --- 42.67 40.80 ---

MEAN 39.49 39.91 42.03 44.19 42.92 57.08 49.66 42.69 --- 42.43 41.73 40.40 MAX 39.55 41.47 46.06 47.21 44.52 64.64 62.84 46.90 --- 45.47 43.31 41.65 MIN 39.42 39.47 40.23 42.49 41.26 43.80 43.71 40.85 --- 39.74 40.80 39.82104 APALACHICOLA RIVER BASIN

02358700 APALACHICOLA RIVER NEAR BLOUNTSTOWN, FL

LOCATION.--Lat 30 ° 25'30", long 85 ° 01'53", in NE 1 ⁄ 4 sec.3, T.1 S., R.8 W., Calhoun County, Hydrologic Unit 03130011, on right bank 500 ft upstream from Neal Lumber Company Landing at McNeal, 0.5 mi upstream from Old River cutoff, 1.5 mi southeast of Blountstown, and 78 mi upstream from mouth.

DRAINAGE AREA.--17,600 mi 2 , approximately.

PERIOD OF RECORD.--January 1920 to September 1957 gage-height records collected in this vicinity by the National Weather Servic e are in the files of the Geological Survey. Miscellaneous discharge measurements from some periods August 1938 to August 1957 are in files of the U.S. Army Corps of Engineers, Mobile, Alabama District. October 1957 to current year.

GAGE.--Water-stage recorder. Datum of gage is 26.96 ft above National Geodetic Vertical Datum of 1929 (National Weather Service benchmark). Prior to Sept. 17, 1921, nonrecording gage near present site at different datum. Sept. 17, 1921 to Aug. 28, 1957

, nonrecording gage at several sites within 500 ft of present site at present datum. Since Aug. 26, 1960, auxiliary nonrecording gage at site 2.2 mi upstream at bridge on State Highway 20, at present datum.

REMARKS.--Records good.

COOPERATION.--Records from October 1957 to current year, were collected and computed by the U.S. Army Corps of Engineers and were reviewed by the Geological Survey.

EXTREMES FOR PERIOD OF RECORD.--Maximum daily discharge, 266,000 ft 3 /s, Mar. 13, 1998; maximum gage height, 27.23 ft, Mar. 13, 1998; minimum daily discharge, 4,680 ft 3 /s (estimated), Aug. 3, 1986.

EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum stage since at least 1920, 28.6 ft present datum, Mar. 21, 1929, discharge not determined, from National Weather Service records.

EXTREMES FOR CURRENT YEAR.--Maximum daily discharge, 75,200 ft 3 /s, Mar. 24, gage height, 21.51 ft; minimum daily, 5,400 ft 3 /s, Oct. 29.

MAIN CHANNEL ONLY DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 5520 5450 7180 12000 14200 12200 27400 13400 10900 18500 13700 8160 2 5490 5480 7180 12100 14100 11800 25900 13000 10900 18600 13000 8240 3 5490 5470 7130 12300 13900 12600 25400 12100 11100 17100 12400 8210 4 5500 5460 6800 13600 13900 26400 33100 11800 13000 16800 12100 8260 5 5500 5440 6550 15700 13700 46200 48300 13100 15500 17100 12100 8160

6 5530 5460 6520 14500 13700 58100 63900 13500 17600 18500 13000 8080 7 5510 5450 6550 14000 13800 64700 69200 12300 18200 17400 15200 7970 8 5470 5450 6550 13900 13600 62100 63200 11600 18500 17900 11200 7900 9 5470 5480 6550 12600 11600 52000 52700 11100 18700 18200 10600 7390 10 5490 5500 6570 11000 10700 46000 46800 11200 20600 15600 10600 7150

11 5490 5530 6550 11700 9590 40200 40700 11100 24100 14400 10500 7100 12 5490 5470 6270 12300 8760 35700 34300 10700 39200 15600 12000 7380 13 5510 5440 6880 12400 8480 34600 31200 10300 41800 15900 12200 8700 14 5490 5450 12600 12400 8450 39600 26300 9520 38700 13400 12200 8710 15 5440 5470 16000 12300 8390 43700 23600 9040 32600 12100 11900 7500

16 5450 5490 16700 12200 8280 46000 22800 8540 29900 11800 11100 7050 17 5460 5490 15400 11000 8180 51600 22200 8380 29200 10800 11000 6680 18 5450 5500 13700 10800 8160 58500 20900 8450 28500 9980 11900 6590 19 5460 5510 13200 10900 13100 61000 20400 8540 26900 9280 11900 6550 20 5460 5520 11800 10900 8240 60000 19100 9320 23700 8620 11100 6470

21 5490 5700 10500 11700 9260 58900 17100 15000 20800 8310 9320 6180 22 5470 6740 9220 16500 9520 64400 15200 20500 e19800 8180 8980 5980 23 5480 7030 8540 20000 9600 73600 14700 21300 e18800 8080 8920 5920 24 5440 6630 8480 21200 11800 75200 14600 18600 e17900 8000 8840 5970 25 5430 6490 8510 20400 12900 66300 15200 15100 e16900 8070 8710 6130

26 5430 6470 8540 19700 13000 59000 15500 12800 e16100 8080 8620 6060 27 5420 6380 8460 18400 13000 54100 15400 12100 e15200 8080 8590 5970 28 5410 7530 8670 18000 12800 48000 15400 11100 e14300 8070 8510 5960 29 5400 7410 9010 16500 --- 44500 15200 10900 13500 8050 8420 5950 30 5440 7140 8930 14900 --- 39000 14000 10900 16300 8080 8150 5870 31 5450 --- 11000 14300 --- 31400 --- 10900 --- 10100 8070 ---

MEAN 5469 5901 9243 14200 11240 47660 28990 12140 21310 12540 10800 7075 MAX 5530 7530 16700 21200 14200 75200 69200 21300 41800 18600 15200 8710 MIN 5400 5440 6270 10800 8160 11800 14000 8380 10900 8000 8070 5870 IN. .36 .37 .61 .93 .67 3.12 1.84 .80 1.35 .82 .71 .45

CAL YR 2000 MEAN 9901 MAX 39700 MIN 5190 IN. 7.66 WTR YR 2001 MEAN 15580 MAX 75200 MIN 5400 IN. 12.02

e Estimated105 APALACHICOLA RIVER BASIN

02358700 APALACHICOLA RIVER NEAR BLOUNTSTOWN, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .56 .48 2.06 4.81 5.55 5.63 12.74 5.63 3.47 7.23 4.98 2.23 2 .52 .51 2.06 4.90 5.54 5.43 12.17 5.38 3.45 7.26 4.65 2.30 3 .53 .50 2.02 4.98 5.50 5.93 11.92 4.84 3.54 6.58 4.27 2.31 4 .54 .49 1.76 5.65 5.52 12.14 14.51 4.65 4.60 6.47 4.11 2.37 5 .54 .47 1.55 6.72 5.46 17.47 17.90 5.36 5.92 6.58 4.13 2.32

6 .57 .49 1.53 6.12 5.50 19.33 20.03 5.55 6.90 7.25 4.62 2.29 7 .55 .48 1.55 5.81 5.59 20.18 20.57 4.90 7.15 6.72 5.80 2.23 8 .50 .48 1.55 5.77 5.54 19.91 19.87 4.44 7.25 6.96 3.66 2.20 9 .50 .51 1.55 5.01 4.49 18.60 18.46 4.13 7.33 7.11 3.29 1.85 10 .52 .54 1.57 4.08 3.95 17.63 17.46 4.15 8.11 5.91 3.30 1.70

11 .53 .57 1.55 4.45 3.32 16.49 16.22 4.10 9.52 5.29 3.26 1.68 12 .53 .50 1.32 4.80 2.81 15.42 14.58 3.82 14.22 5.90 4.17 1.91 13 .55 .47 1.80 4.82 2.66 15.16 13.62 3.58 14.80 6.07 4.33 2.88 14 .52 .48 5.49 4.80 2.68 16.49 11.91 3.04 14.11 4.78 4.34 2.91 15 .47 .50 7.26 4.76 2.68 17.40 10.84 2.70 12.47 4.07 4.19 2.07

16 .48 .52 7.57 4.65 2.64 17.88 10.47 2.33 11.64 3.90 3.78 1.75 17 .49 .53 6.94 3.97 2.61 18.87 10.18 2.20 11.40 3.32 3.76 1.48 18 .48 .54 6.04 3.82 2.65 19.87 9.61 2.23 11.17 2.79 4.30 1.43 19 .49 .55 5.74 3.83 5.71 20.23 9.36 2.26 10.57 2.35 4.28 1.41 20 .49 .56 4.92 3.86 2.78 20.14 8.77 2.77 9.39 1.91 3.86 1.38

21 .53 .77 4.17 4.29 3.52 19.97 7.83 5.98 8.17 1.70 2.77 1.15 22 .50 1.71 3.31 6.78 3.73 20.61 6.88 8.49 e7.75 1.61 2.56 1.00 23 .51 1.94 2.84 8.38 3.82 21.43 6.59 8.82 e7.33 1.54 2.55 .97 24 .47 1.62 2.78 8.87 5.18 21.51 6.48 7.66 e6.90 1.49 2.52 1.04 25 .45 1.50 2.78 8.51 5.84 20.73 6.79 5.98 e6.48 1.54 2.45 1.20

26 .45 1.49 2.78 8.18 5.95 19.81 6.86 4.72 e6.06 1.55 2.41 1.13 27 .44 1.41 2.71 7.60 5.99 19.11 6.78 4.28 e5.64 1.56 2.42 1.04 28 .43 2.32 2.83 7.37 5.90 18.11 6.76 3.71 e5.21 1.55 2.38 1.02 29 .42 2.23 3.04 6.67 --- 17.44 6.64 3.58 4.79 1.55 2.34 1.01 30 .46 2.03 2.98 5.84 --- 16.23 5.99 3.54 6.20 1.57 2.18 .93 31 .48 --- 4.27 5.57 --- 14.15 --- 3.51 --- 2.92 2.14 ---

TOTAL 15.50 27.19 100.32 175.67 123.11 529.30 348.79 138.33 241.54 127.03 109.80 51.19 MEAN .50 .91 3.24 5.67 4.40 17.07 11.63 4.46 8.05 4.10 3.54 1.71 MAX .57 2.32 7.57 8.87 5.99 21.51 20.57 8.82 14.80 7.26 5.80 2.91 MIN .42 .47 1.32 3.82 2.61 5.43 5.99 2.20 3.45 1.49 2.14 .93

CAL YR 2000 TOTAL 1024.76 MEAN 2.80 MAX 14.47 MIN .17 WTR YR 2001 TOTAL 1987.77 MEAN 5.45 MAX 21.51 MIN .42

e Estimated106 APALACHICOLA RIVER BASIN

02358784 MUDDY BRANCH NEAR MARIANNA, FL

LOCATION.--Lat 30 ° 49'58", long 85 ° 12'31", in SW 1 ⁄ 4 sec. 14, T. 5N., R. 10W., Jackson County, Hydrologic Unit 03130012, at downstream side of culvert at County Road 167, 1.4 mi west of Marianna Municipal Airport, 1.4 mi north of State Highway 166, 2.4 mi upstream from Chipola River, and 4.2 mi north of Marianna.

DRAINAGE AREA.--10.4 mi 2

. PERIOD OF RECORD.--October 1998 to September 1999, October 1999 to September 2000 (gage heights only), October 2000 to Septembe r 2001.

GAGE.--Water-stage recorder.

REMARKS.--Records poor.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 .00 .00 .00 e.00 .00 .00 2.2 .58 .02 .00 e.25 .01 2 .00 .00 .00 e.00 .00 .00 2.0 .56 .17 .08 e.45 .11 3 .00 .00 .00 e.00 .00 .00 1.9 .54 .00 .26 e.25 .23 4 .00 .00 .00 .00 .00 .34 7.7 .52 .00 .00 e.10 .33 5 .00 .00 .00 .00 .00 .31 4.8 .51 .00 .00 e.05 .31

6 .00 .00 .00 e.00 .00 .00 3.1 .48 .00 .00 e.10 .29 7 .00 .00 .00 e.00 .00 .00 2.4 .46 .00 .49 e.15 .34 8 .00 .00 .00 .00 .00 .00 2.3 .44 .72 1.6 e.25 .22 9 .00 .00 .00 e.00 .00 .00 2.1 .39 2.9 .33 e.20 .09 10 .00 .00 .00 e.00 .00 .00 1.5 .36 2.2 1.8 e.05 .00

11 .00 .00 .00 e.00 .00 .00 1.5 .36 6.7 3.1 e.00 .00 12 .00 .00 .00 e.00 .00 3.0 1.3 .33 8.5 .55 e.00 .07 13 .00 .00 .00 e.00 .00 11 1.2 .29 1.3 .09 e.00 .62 14 .00 .00 .00 e.00 .00 2.6 1.1 .23 .81 .02 e.20 .27 15 .00 .00 .00 .00 .00 21 1.1 .15 .62 .19 e.40 .07

16 .00 .00 .00 .00 .00 6.0 1.0 .00 .39 .24 e.10 .00 17 .00 .00 .00 .00 .00 3.8 .89 .00 .34 e.20 e.00 .00 18 .00 .00 .00 .00 .00 3.7 .82 .00 .18 e.10 e.00 .00 19 .00 .00 .00 .00 .00 3.1 .63 .00 .03 e.00 e.00 .00 20 .00 .00 .00 .00 .00 15 .45 4.1 .00 e.00 e.15 .00

21 .00 .00 e.00 .00 .00 5.6 .41 1.7 .00 e.00 e.20 .00 22 .00 .00 .00 e.00 .00 3.6 .53 .50 .04 e.05 .21 .00 23 .00 .00 .00 e.00 .00 3.3 .69 .29 .19 e.20 .20 .00 24 .00 .00 .00 e.00 .00 3.1 .72 .12 .00 e.30 .15 .00 25 .00 .00 .00 e.00 .00 3.1 .71 .01 .00 e.15 .07 .00

26 .00 .00 .00 .00 .00 2.9 .66 .00 .00 e.10 .01 .00 27 .00 .00 .00 e.00 .00 2.7 .64 .00 .00 e.05 .00 .00 28 .00 .00 .00 .00 .00 2.6 .62 .00 .00 e.00 .00 .00 29 .00 .00 .00 .00 --- 4.0 .60 .00 .00 e.00 .00 .00 30 .00 .00 .00 .00 --- 4.1 .58 .00 .00 e.00 .00 .00 31 .00 --- .00 .00 --- 2.9 --- .00 --- e.10 .00 ---

MEAN .000 .000 .000 .000 .000 3.48 1.54 .42 .84 .32 .11 .099 MAX .00 .00 .00 .00 .00 21 7.7 4.1 8.5 3.1 .45 .62 MIN .00 .00 .00 .00 .00 .00 .41 .00 .00 .00 .00 .00

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 1.64 .51 .23 .87 .55 1.41 .77 .66 .54 .52 .15 .11 MAX 4.50 1.40 .67 1.74 1.06 3.48 1.54 1.58 .84 1.25 .33 .14 (WY) 1999 1999 1999 1999 1999 2001 2001 1999 2001 1999 1999 2000 MIN .000 .000 .000 .000 .000 .31 .38 .000 .001 .005 .001 .099 (WY) 2001 2001 2001 2001 2001 2000 2000 2000 2000 2000 2000 2001

SUMMARY STATISTICS FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN .57 .88 HIGHEST ANNUAL MEAN 1.19 1999 LOWEST ANNUAL MEAN .57 2001 HIGHEST DAILY MEAN 21 Mar 15 25 Oct 1 1998 LOWEST DAILY MEAN .00 Oct 1 .00 Apr 21 1999 ANNUAL SEVEN-DAY MINIMUM .00 Oct 1 .00 Sep 3 1999 MAXIMUM PEAK FLOW 50 Mar 15 50 Mar 15 2001 MAXIMUM PEAK STAGE 5.72 Mar 15 6.70 May 7 1999 INSTANTANEOUS LOW FLOW .00 Oct 1 .00 Apr 21 1999 10 PERCENT EXCEEDS 1.7 1.7 50 PERCENT EXCEEDS .00 .02 90 PERCENT EXCEEDS .00 .00

e Estimated107 APALACHICOLA RIVER BASIN

02358789 CHIPOLA RIVER AT MARIANNA, FL

LOCATION.--Lat 30 ° 46'22", long 85 ° 12'59", in SE 1 ⁄ 4 sec. 3, T.4N., R.10W, Jackson County, Hydrologic Unit 03130012, at bridge on downstream side of U.S. Highway 90, 0.6 mi east of courthouse in Marianna, and 78.5 mi upstream from mouth.

DRAINAGE AREA.--464 mi 2

. PERIOD OF RECORD.--April 1913 to October 1986 (miscellaneous discharge measurements), October 1999 to current year.

GAGE.--Water-stage recorder. Elevation of gage is 56 ft above National Geodetic Vertical Datum of 1929, from Topographic map. Prior to Oct. 1, 1999, nonrecording gage at same site at different datum.

REMARKS.--Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 164 125 465 e1280 538 415 1360 470 293 475 419 377 2 158 125 387 1420 570 474 1460 451 362 587 507 365 3 154 125 347 1350 620 500 1460 428 428 859 577 363 4 151 124 324 1160 628 576 1390 410 455 922 653 397 5 149 125 311 948 587 667 1390 391 496 719 689 460

6 150 125 303 823 543 820 1550 372 465 554 721 462 7 152 125 296 757 512 1350 2170 356 396 482 e759 451 8 156 125 291 718 493 1720 2720 342 375 441 796 433 9 152 131 286 693 477 1730 2740 330 396 400 906 396 10 152 140 284 667 480 1470 2370 321 458 376 1130 359

11 149 145 282 650 490 1130 1890 315 543 375 1200 330 12 147 152 282 645 478 951 1450 307 754 355 1130 309 13 145 158 280 647 470 1070 1190 300 983 344 982 324 14 143 158 282 636 473 1180 1040 294 1220 352 904 329 15 141 158 377 634 470 1750 951 287 1570 363 888 311

16 140 162 523 640 460 2370 880 278 1740 338 837 293 17 138 172 576 631 455 2890 832 268 1720 303 802 274 18 137 183 593 603 445 3440 847 259 1560 282 842 259 19 136 208 675 586 431 3760 959 251 1280 269 749 245 20 135 242 867 608 422 3650 958 271 968 256 646 237

21 134 266 1030 601 412 3160 819 331 744 250 592 232 22 132 276 1050 585 404 2690 703 406 703 252 547 224 23 131 e300 912 584 399 2670 647 477 736 255 500 218 24 130 e360 793 604 392 2920 610 536 716 249 455 223 25 129 e300 e720 588 389 2850 585 515 643 242 413 240

26 128 e305 e680 555 390 2470 558 441 589 258 378 248 27 127 346 e760 528 392 2020 535 383 544 273 356 241 28 126 372 e820 509 394 1620 535 339 495 283 335 232 29 127 445 e840 496 --- 1440 523 316 460 284 325 220 30 126 508 e880 504 --- 1370 496 302 444 288 343 208 31 125 --- e1020 522 --- 1330 --- 291 --- 315 359 ---

MEAN 141 216 566 715 472 1821 1187 356 751 387 669 309 MAX 164 508 1050 1420 628 3760 2740 536 1740 922 1200 462 MIN 125 124 280 496 389 415 496 251 293 242 325 208 CFSM .30 .47 1.22 1.54 1.02 3.92 2.56 .77 1.62 .83 1.44 .67 IN. .35 .52 1.41 1.78 1.06 4.53 2.86 .88 1.81 .96 1.66 .74

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 2000 - 2001, BY WATER YEAR (WY)

MEAN 203 248 420 532 481 1248 794 275 451 268 405 234 MAX 266 280 566 715 490 1821 1187 356 751 387 669 309 (WY) 2000 2000 2001 2001 2000 2001 2001 2001 2001 2001 2001 2001 MIN 141 216 275 349 472 674 400 194 151 149 142 159 (WY) 2001 2001 2000 2000 2001 2000 2000 2000 2000 2000 2000 2000

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 2000 - 2001

ANNUAL MEAN 302 634 464 HIGHEST ANNUAL MEAN 634 2001 LOWEST ANNUAL MEAN 294 2000 HIGHEST DAILY MEAN 1050 Mar 21 3760 Mar 19 3760 Mar 19 2001 LOWEST DAILY MEAN 124 Aug 24 124 Nov 4 124 Aug 24 2000 ANNUAL SEVEN-DAY MINIMUM 125 Oct 31 125 Oct 31 125 Oct 31 2000 MAXIMUM PEAK FLOW 3790 Mar 19 3790 Mar 19 2001 MAXIMUM PEAK STAGE 15.65 Mar 19 15.65 Mar 19 2001 INSTANTANEOUS LOW FLOW 124 Oct 31 120 Aug 25 2000 ANNUAL RUNOFF (CFSM) .65 1.37 1.00 ANNUAL RUNOFF (INCHES) 8.87 18.55 13.57 10 PERCENT EXCEEDS 670 1350 902 50 PERCENT EXCEEDS 192 455 313 90 PERCENT EXCEEDS 132 152 142

e Estimated108 APALACHICOLA RIVER BASIN

02359000 CHIPOLA RIVER NEAR ALTHA, FL

LOCATION.--Lat 30 ° 32'02", long 85 ° 09'55", in NW 1 ⁄ 4 sec. 32, T.2 N., R.9 W., Calhoun County, Hydrologic Unit 03130012, on right downstream bank at State Highway 274, 0.9 mi downstream from Holliman Branch, 3.5 mi southwest of Altha, and 54 mi upstream from mouth.

DRAINAGE AREA.--781 mi 2

.
PERIOD OF RECORD.--November 1912 to December 1913, September 1921 to September 1927, August 1929 to September 1931, March 1943 to current year. Monthly discharge only for some periods published in WSP 1304.

REVISED RECORDS.--WSP 1384: Drainage area. WSP 1504: 1924, 1925 (M), 1926.

GAGE.--Water-stage recorder. Datum of gage is 19.95 ft above National Geodetic Vertical Datum of 1929 (levels by Corps of Engineers). Prior to Jan. 13, 1950, and Mar. 13, 1978 to Mar. 20, 1979, nonrecording gage at same site and datum.

REMARKS.-No estimated daily discharges. Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 440 374 760 1180 799 662 1870 844 667 848 716 734 2 431 374 696 1430 814 696 1860 833 681 900 803 779 3 449 374 639 1570 851 786 1900 812 730 1090 904 795 4 444 371 588 1510 879 901 1940 792 763 1290 934 777 5 438 366 567 1310 861 936 2000 782 782 1200 983 822

6 422 356 554 1140 852 983 1950 742 789 1010 1180 840 7 467 355 548 1050 802 1240 2120 719 726 891 1240 874 8 448 346 587 1000 760 1670 2590 704 681 837 1220 815 9 412 387 578 966 734 1900 2870 691 734 801 1320 776 10 445 448 565 935 778 1880 2860 695 794 764 1550 729

11 432 403 553 911 767 1580 2530 681 1130 789 1730 680 12 405 400 556 914 744 1360 2090 686 2620 755 1740 649 13 391 408 540 910 728 1780 1780 662 1910 726 1640 656 14 383 429 537 901 722 1730 1610 649 1750 718 1430 669 15 375 410 565 893 723 2040 1470 641 1940 722 1350 644

16 377 409 690 895 712 2550 1380 625 2090 709 1280 616 17 432 442 776 893 747 2810 1300 608 2170 659 1210 595 18 416 438 794 876 713 3050 1220 598 2100 618 1270 588 19 388 495 866 880 686 3340 1250 614 1900 609 1210 569 20 376 526 964 952 672 3840 1320 704 1590 616 1070 555

21 385 553 1110 916 658 3860 1270 725 1270 618 993 544 22 364 554 1210 893 649 3480 1090 720 1090 606 936 531 23 348 564 1160 872 644 3120 1020 772 1110 598 885 532 24 355 588 1030 876 671 3060 1030 815 1090 598 826 567 25 342 649 932 874 650 3100 1000 837 1030 583 786 564

26 343 618 870 841 632 2980 957 782 962 591 741 562 27 387 629 838 815 630 2680 908 758 923 608 712 554 28 383 669 912 792 632 2240 909 695 899 621 693 544 29 369 697 977 773 --- 2050 878 661 863 618 673 530 30 354 752 994 783 --- 2030 847 636 852 647 658 501 31 369 --- 1030 788 --- 1950 --- 619 --- 767 696 ---

MEAN 399 479 774 979 732 2138 1594 713 1221 755 1077 653 MAX 467 752 1210 1570 879 3860 2870 844 2620 1290 1740 874 MIN 342 346 537 773 630 662 847 598 667 583 658 501 IN. .59 .69 1.14 1.45 .98 3.16 2.28 1.05 1.75 1.11 1.59 .93

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1913 - 2001, BY WATER YEAR (WY)

MEAN 1089 965 1237 1788 2130 2396 2083 1338 1234 1277 1194 1140 MAX 6000 2763 3617 5936 5687 5465 7200 3890 3636 5353 3273 7642 (WY) 1927 1948 1948 1926 1926 1998 1948 1964 1989 1994 1946 1926 MIN 379 370 394 473 671 540 757 598 462 460 417 397 (WY) 1969 1991 1956 1956 1955 1955 1968 2000 2000 2000 2000 1990

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1913 - 2001

ANNUAL MEAN 660 961 1489 HIGHEST ANNUAL MEAN 2977 1948 LOWEST ANNUAL MEAN 613 1955 HIGHEST DAILY MEAN 1860 Feb 15 3860 Mar 21 21000 Sep 19 1926 LOWEST DAILY MEAN 338 Aug 25 342 Oct 25 312 Jun 18 1972 ANNUAL SEVEN-DAY MINIMUM 348 Aug 25 359 Oct 20 336 Oct 27 1968 MAXIMUM PEAK FLOW 3950 Mar 20 25000 Sep 20 1926 MAXIMUM PEAK STAGE 17.50 Mar 20 33.55 Sep 20 1926 INSTANTANEOUS LOW FLOW 336 Oct 25 309 Nov 18 1990 ANNUAL RUNOFF (INCHES) 11.50 16.71 25.91 10 PERCENT EXCEEDS 1080 1870 2760 50 PERCENT EXCEEDS 553 777 1110 90 PERCENT EXCEEDS 385 430 620109 APALACHICOLA RIVER BASIN

02359051 CHIPOLA RIVER AT COCKRAN LANDING NEAR WEWAHITCHKA, FL

LOCATION.--Lat 30 ° 06'01", long 85 ° 10'53", NE 1 ⁄ 4 sec.30, T.4 S., R.9 W., Gulf County, Hydrologic Unit 03130012, on left bank at Cockran Landing, 2.34 mi downstream from Dead Lake, 1.45 mi southeast of Wewahitchka and 11.5 mi upstream from mouth.

DRAINAGE AREA.--1,206 mi 2 , approximately.

PERIOD OF RECORD.-- October 1987 to current year.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (levels by U.S. Army Corps of Engineers)

. REMARKS.--No estimated daily discharges. Records good. Discharge for main channel only and includes flow diverted from the Apalachicola River through the Chipola Cutoff.

COOPERATION.--Records from October 1987 to current year, were collected and computed by U.S. Army Corps of Engineers and were reviewed by Geological Survey.

EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, not determined, July 12, 1994, gage height 25.16 ft; minimum discharge 2,460 ft 3 /s, Aug. 9, 1988.

EXTREMES OUTSIDE PERIOD OF RECORD.--The flood of January 1978 reached a stage of 25.64 ft.

EXTREMES FOR CURRENT YEAR.--Maximum daily discharge, 14,100 ft 3 /s, Mar. 25, gage height, 20.31 ft; minimum daily discharge, 2,800 ft 3 /s, Oct. 28-29, 31.

MAIN CHANNEL ONLY DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 3210 2890 3720 4450 5530 5000 10900 5830 4530 5970 5400 4240 2 3160 2890 3730 4730 5370 4970 10300 5640 4480 6370 5860 4340 3 3110 2900 3740 4900 5260 4920 9810 5460 4400 6600 5970 4390 4 3070 2900 3690 5050 5190 5120 9510 5230 4360 6660 5980 4430 5 3060 2900 3600 5360 5150 6010 9560 5090 4580 6750 6570 4500

6 3050 2890 3500 5660 5110 7060 9950 5130 4950 6910 7470 4520 7 3070 2900 3440 5710 5090 8150 10800 5150 5350 7010 8070 4500 8 3050 2890 3410 5650 5090 9440 11800 5030 5650 6940 8180 4530 9 3020 2920 3410 5550 5000 11000 12500 4860 5860 6980 7910 4460 10 3000 2950 3410 5260 4760 12000 12400 4720 6040 7020 7490 4320

11 3000 2940 3420 4970 4510 12000 12100 4640 6460 6800 7240 4200 12 2990 2960 3410 4930 4260 11600 13600 4570 7340 6570 7150 4110 13 3000 2940 3350 4910 4030 11400 11100 4500 8710 6580 7060 4120 14 2990 2940 3510 4900 3860 11000 10600 4390 9800 6480 6960 4250 15 2970 2930 4280 4880 3770 10700 10000 4230 10300 6100 6780 4230

16 2950 2920 5090 4860 3720 10800 9410 4070 10300 5770 6530 4050 17 2940 2960 5630 4770 3690 11000 8930 3910 10200 5480 6400 3870 18 2930 2960 5800 4600 3660 11400 8470 3780 9950 5160 6390 3720 19 2930 2990 5760 4490 3640 11800 8100 3720 9730 4880 6380 3630 20 2940 3010 5620 4470 3630 12600 7860 3690 9460 4680 6230 3590

21 2930 3010 5350 4430 3650 13100 7600 3790 9040 4510 5810 3540 22 2930 3080 5040 4630 3780 13000 7230 4400 8440 4390 5470 3430 23 2930 3290 4710 5170 3890 13000 6830 5290 7880 4280 5210 3360 24 2920 3440 4470 5760 3980 13500 6500 5860 7400 4400 5020 3420 25 2900 3570 4320 6210 4260 14100 6320 6070 6920 4500 4840 3520

26 2890 3580 4210 6450 4620 14000 6220 5880 6340 4570 4710 3570 27 2890 3580 4110 6540 4810 13200 6150 5500 5870 4640 4590 3560 28 2880 3580 4070 6440 4920 12700 6100 5130 5600 4680 4500 3500 29 2880 3720 4080 6290 --- 12300 6050 4820 5460 4680 4420 3430 30 2890 3750 4120 6070 --- 11900 5990 4610 5610 4620 4340 3360 31 2880 --- 4180 5760 --- 11400 --- 4560 --- 4780 4260 ---

MEAN 2979 3106 4199 5285 4437 10650 9090 4824 7034 5670 6103 3956 MAX 3210 3750 5800 6540 5530 14100 13600 6070 10300 7020 8180 4530 MIN 2880 2890 3350 4430 3630 4920 5990 3690 4360 4280 4260 3360 IN. 2.85 2.87 4.02 5.05 3.83 10.18 8.41 4.61 6.51 5.42 5.84 3.66

CAL YR 2000 MEAN 4410 MAX 9890 MIN 2880 IN. 49.79 WTR YR 2001 MEAN 5619 MAX 14100 MIN 2880 IN. 63.26110 APALACHICOLA RIVER BASIN

02359051 CHIPOLA RIVER AT COCKRAN LANDING NEAR WEWAHITCHKA, FL--Continued

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 9.75 9.18 10.90 12.32 14.10 13.60 18.60 14.35 12.52 13.97 12.60 11.39 2 9.64 9.18 10.92 12.74 13.90 13.58 18.25 14.11 12.45 14.38 13.13 11.56 3 9.54 9.21 10.93 12.99 13.77 13.52 17.96 13.89 12.32 14.61 13.24 11.66 4 9.47 9.20 10.85 13.21 13.69 13.79 17.76 13.59 12.26 14.64 13.24 11.76 5 9.44 9.20 10.70 13.61 13.64 14.89 17.78 13.41 12.58 14.71 13.86 11.87

6 9.42 9.19 10.50 14.00 13.60 16.00 18.00 13.45 13.09 14.86 14.69 11.92 7 9.46 9.21 10.40 14.06 13.58 16.94 18.44 13.48 13.61 14.93 15.18 11.93 8 9.44 9.20 10.35 14.00 13.59 17.77 19.00 13.32 13.97 14.85 15.24 11.99 9 9.38 9.25 10.34 13.89 13.46 18.65 19.34 13.08 14.22 14.86 15.05 11.91 10 9.34 9.33 10.35 13.54 13.14 19.22 19.30 12.88 14.43 14.87 14.71 11.72

11 9.33 9.32 10.37 13.16 12.80 19.20 19.10 12.75 14.88 14.64 14.51 11.55 12 9.33 9.35 10.36 13.12 12.41 19.02 19.87 12.65 15.74 14.38 14.45 11.43 13 9.34 9.32 10.25 13.10 12.05 18.90 18.58 12.55 16.78 14.37 14.40 11.47 14 9.33 9.32 10.56 13.10 11.79 18.68 18.29 12.38 17.45 14.24 14.33 11.70 15 9.30 9.29 11.88 13.08 11.63 18.56 17.94 12.13 17.70 13.80 14.16 11.69

16 9.25 9.28 13.06 13.07 11.55 18.60 17.57 11.86 17.70 13.40 13.93 11.42 17 9.24 9.37 13.75 12.95 11.50 18.72 17.26 11.60 17.60 13.03 13.82 11.15 18 9.23 9.38 13.96 12.72 11.45 18.95 16.96 11.37 17.45 12.60 13.82 10.90 19 9.23 9.44 13.92 12.57 11.41 19.16 16.70 11.25 17.30 12.20 13.84 10.76 20 9.24 9.47 13.76 12.56 11.40 19.61 16.49 11.19 17.12 11.90 13.70 10.71

21 9.24 9.48 13.44 12.51 11.46 19.84 16.25 11.37 16.84 11.63 13.25 10.64 22 9.24 9.64 13.05 12.80 11.69 19.82 15.91 12.37 16.44 11.43 12.86 10.47 23 9.24 10.07 12.60 13.56 11.89 19.80 15.53 13.60 16.00 11.24 12.56 10.35 24 9.22 10.36 12.27 14.29 12.05 20.03 15.17 14.28 15.56 11.41 12.33 10.49 25 9.18 10.60 12.05 14.82 12.51 20.31 14.97 14.53 15.11 11.53 12.11 10.71

26 9.15 10.63 11.89 15.09 13.06 20.23 14.85 14.31 14.48 11.61 11.94 10.82 27 9.15 10.63 11.74 15.19 13.33 19.83 14.77 13.84 13.94 11.69 11.80 10.79 28 9.14 10.63 11.68 15.10 13.50 19.56 14.70 13.37 13.58 11.73 11.69 10.68 29 9.15 10.89 11.71 14.95 --- 19.38 14.64 12.94 13.39 11.70 11.59 10.54 30 9.16 10.95 11.78 14.72 --- 19.14 14.55 12.65 13.55 11.60 11.49 10.40 31 9.16 --- 11.89 14.37 --- 18.89 --- 12.57 --- 11.80 11.39 ---

MEAN 9.31 9.65 11.68 13.59 12.64 18.20 17.15 12.94 15.00 13.18 13.38 11.21 MAX 9.75 10.95 13.96 15.19 14.10 20.31 19.87 14.53 17.70 14.93 15.24 11.99 MIN 9.14 9.18 10.25 12.32 11.40 13.52 14.55 11.19 12.26 11.24 11.39 10.35

CAL YR 2000 MEAN 11.40 MAX 17.43 MIN 9.14 WTR YR 2001 MEAN 13.17 MAX 20.31 MIN 9.14111 APALACHICOLA RIVER BASIN

02359170 APALACHICOLA RIVER NEAR SUMATRA, FL

LOCATION.--Lat 29 ° 56'57", Long 85 ° 00'56", in SW 1 ⁄ 4 sec.14, T.6 S., R.8 W., Franklin County, Hydrologic Unit 03130011, on left bank at Brickyard Landing, 0.5 mi north of Fort Gadsden, 5.3 mi southwest of Sumatra, and 20.6 mi upstream from mouth.

DRAINAGE AREA.--19,200 mi 2 , approximately.

PERIOD OF RECORD.--September 1977 to current year.

REVISED RECORDS.--WRD FL-98-4: 1994-97.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929 (U.S. Army Corps of Engineers bench mark).

REMARKS.--Records good. Discharges below 15,000 ft 3 /s are tide affected.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 7000 6630 9250 e11500 17200 13400 53500 15800 11500 13200 11000 8810 2 6970 6830 9320 11900 15200 13500 46300 14300 11400 16500 12000 9120 3 6740 6490 9020 12100 13700 13400 40400 13400 11200 18300 13000 9500 4 6970 6200 8860 12400 13400 15600 36200 12900 11100 18900 13300 9770 5 6690 6720 8810 12700 13300 19400 34100 12700 11300 18700 13300 9720

6 6520 7330 8920 13400 13200 25100 33800 12700 12000 18900 28300 9820 7 6170 7950 8890 15100 13200 30400 36300 12800 12800 19600 31300 9920 8 5330 8030 8920 15700 13200 37300 43100 12700 13500 19800 29000 9970 9 4920 8860 8920 13900 13200 46900 54500 12500 15600 19700 26500 9790 10 4860 7570 9040 13200 12700 56500 64400 12300 16800 20200 23500 9200

11 5840 6430 8810 12700 12100 62500 64100 12000 19500 20400 20800 8790 12 6490 6690 8920 12800 11600 61300 58000 11900 23400 19100 19100 8860 13 6600 7000 8530 12600 11000 59700 51200 11700 26200 17900 18200 9200 14 7050 6860 9520 12700 10600 54400 45000 11300 29400 17500 17500 9450 15 6880 5780 10700 12700 10300 50500 40100 11000 32500 16700 17000 8990

16 6630 6690 12300 12600 10200 48600 35900 10500 34900 13300 16000 8810 17 6660 7080 14000 12600 10000 48700 32800 10000 35700 12800 15000 8710 18 6430 6110 15100 12300 9600 51100 30500 9670 35300 12300 14000 8290 19 6460 6720 15200 12200 9650 54800 28700 9570 34700 11700 13900 8240 20 6690 5900 14300 11900 10000 65500 27300 9500 33200 11100 14100 8160

21 6740 5300 e13000 11600 10200 76300 26100 9520 31700 10700 12900 8370 22 6910 5300 e11500 11700 10800 81600 24700 10700 30100 10500 11900 7870 23 6600 6770 e10500 12300 11100 81600 22900 12500 28800 10300 11300 7600 24 6520 8710 e10400 15200 11300 82600 21000 16200 26100 10700 10500 7980 25 6460 11200 e10300 18900 11700 88300 19400 18000 23400 11400 9870 7790

26 6970 9670 e10200 20900 12500 91900 18300 17200 20100 11000 9520 7600 27 7000 8970 e10300 22000 13000 91000 17600 13500 16200 10800 9320 7600 28 6520 8760 e10400 22100 13200 86200 17300 12900 13200 10600 9120 7600 29 6880 9300 e10400 21700 --- 79100 17000 12300 12900 10600 9020 7520 30 6830 9200 e10500 21500 --- 70500 16700 11800 12900 10500 8890 6910 31 6630 --- e11000 19500 --- 61300 --- 11500 --- 10400 8860 ---

MEAN 6515 7368 10510 14660 12040 55450 35240 12430 21580 14650 15420 8665 MAX 7050 11200 15200 22100 17200 91900 64400 18000 35700 20400 31300 9970 MIN 4860 5300 8530 11500 9600 13400 16700 9500 11100 10300 8860 6910 IN. .39 .43 .63 .88 .65 3.33 2.05 .75 1.25 .88 .93 .50

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1978 - 2001, BY WATER YEAR (WY)

MEAN 15050 16020 23830 30260 41110 47210 36260 24170 19390 21180 18970 15900 MAX 40720 32420 52700 62310 71920 95690 78430 46350 29450 81670 42360 33700 (WY) 1995 1978 1993 1998 1998 1998 1980 1991 1980 1994 1994 1994 MIN 6515 6577 9300 10380 10130 16740 15610 10380 6085 5631 5878 7302 (WY) 2001 1982 2000 1981 1989 2000 1999 1999 2000 2000 2000 2000

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1978 - 2001

ANNUAL MEAN 11020 17920 25710 HIGHEST ANNUAL MEAN 38760 1998 LOWEST ANNUAL MEAN 11100 2000 HIGHEST DAILY MEAN 36800 Apr 9 91900 Mar 26 178000 Mar 24 1990 LOWEST DAILY MEAN 4860 Oct 10 4860 Oct 10 4860 Oct 10 2000 ANNUAL SEVEN-DAY MINIMUM 5360 Jul 7 5730 Oct 6 5360 Jul 7 2000 MAXIMUM PEAK FLOW 92400 Mar 26 179000 Mar 24 1990 MAXIMUM PEAK STAGE 10.29 Mar 26 15.36 Mar 15 1998 INSTANTANEOUS LOW FLOW 4860 Oct 10 4860 Oct 10 2000 ANNUAL RUNOFF (INCHES) 7.82 12.67 18.19 10 PERCENT EXCEEDS 23900 36200 48400 50 PERCENT EXCEEDS 7600 12200 19800 90 PERCENT EXCEEDS 5660 6830 9400

e Estimated112 APALACHICOLA RIVER BASIN 02359170 APALACHICOLA RIVER NEAR SUMATRA, FL--Continued

MAIN CHANNEL ONLY DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 7000 6630 9250 e11500 14900 13400 24300 14500 11500 13200 11000 8810 2 6970 6830 9320 11900 14200 13500 23300 13800 11400 14600 12000 9120 3 6740 6490 9020 12100 13600 13400 22100 13400 11200 15200 13000 9500 4 6970 6200 8860 12400 13400 14300 21200 12900 11100 15400 13300 9770 5 6690 6720 8810 12700 13300 15600 20700 12700 11300 15400 13300 9720

6 6520 7330 8920 13400 13200 17400 20600 12700 12000 15400 18300 9820 7 6170 7950 8890 14100 13200 18900 21300 12800 12800 15700 19100 9920 8 5330 8030 8920 14300 13200 20600 22700 12700 13500 15700 18500 9970 9 4920 8860 8920 13700 13200 22700 24400 12500 14300 15700 17800 9790 10 4860 7570 9040 13200 12700 24400 25400 12300 14700 15900 16900 9200

11 5840 6430 8810 12700 12100 25000 25300 12000 15600 15900 16100 8790 12 6490 6690 8920 12800 11600 24900 24800 11900 16900 15500 15500 8860 13 6600 7000 8530 12600 11000 24700 24100 11700 17700 15100 15200 9200 14 7050 6860 9520 12700 10600 24100 23000 11300 18600 15000 15000 9450 15 6880 5780 10700 12700 10300 23500 22100 11000 19500 14700 14800 8990

16 6630 6690 12300 12600 10200 23100 21200 10500 20100 13300 14400 8810 17 6660 7080 13700 12600 10000 23100 20300 10000 20200 12800 14100 8710 18 6430 6110 14100 12300 9600 23600 19600 9670 20200 12300 13700 8290 19 6460 6720 14100 12200 9650 24200 19100 9570 20000 11700 13700 8240 20 6690 5900 13800 11900 10000 25300 18600 9500 19600 11100 13700 8160

21 6740 5300 e13000 11600 10200 26200 18300 9520 19200 10700 12900 8370 22 6910 5300 e11500 11700 10800 26700 17800 10700 18800 10500 11900 7870 23 6600 6770 e10500 12300 11100 26700 17200 12500 18500 10300 11300 7600 24 6520 8710 e10400 14100 11300 26700 16500 14500 17700 10700 10500 7980 25 6460 11200 e10300 15400 11700 27300 15900 15100 16900 11400 9870 7790

26 6970 9670 e10200 16100 12500 27800 15400 14900 15800 11000 9520 7600 27 7000 8970 e10300 16500 13000 27700 15200 13500 14500 10800 9320 7600 28 6520 8760 e10400 16500 13200 27100 15100 12900 13200 10600 9120 7600 29 6880 9300 e10400 16400 --- 26500 15000 12300 12900 10600 9020 7520 30 6830 9200 e10500 16300 --- 25900 14900 11800 12900 10500 8890 6910 31 6630 --- e11000 15600 --- 25100 --- 11500 --- 10400 8860 ---

MEAN 6515 7368 10420 13450 11920 22880 20180 12150 15750 13130 13250 8665 MAX 7050 11200 14100 16500 14900 27800 25400 15100 20200 15900 19100 9970 MIN 4860 5300 8530 11500 9600 13400 14900 9500 11100 10300 8860 6910

CAL YR 2000 MEAN 9686 MAX 20700 MIN 4860 WTR YR 2001 MEAN 12980 MAX 27800 MIN 4860

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 2.06 2.03 2.56 --- 4.95 4.48 8.15 4.83 3.48 4.53 3.43 3.03 2 2.09 2.10 2.62 3.64 4.72 4.52 7.71 4.69 3.44 4.86 3.98 3.13 3 2.05 2.00 2.50 3.79 4.55 4.54 7.33 4.53 3.36 5.08 4.37 3.25 4 2.13 1.81 2.33 3.93 4.48 4.76 7.04 4.33 3.35 5.13 4.45 3.26 5 2.04 1.97 2.35 4.19 4.43 5.19 6.86 4.14 3.55 5.11 4.62 3.26

6 2.07 2.36 2.38 4.55 4.38 5.78 6.84 4.14 3.93 5.14 6.07 3.27 7 1.88 2.52 2.41 4.70 4.39 6.27 7.05 4.21 4.32 5.21 6.35 3.29 8 1.53 2.47 2.48 4.78 4.39 6.84 7.51 4.15 4.59 5.23 6.16 3.32 9 1.20 2.83 2.54 4.67 4.41 7.54 8.20 4.02 4.76 5.22 5.92 3.32 10 1.35 2.35 2.62 4.43 4.23 8.16 8.74 3.88 4.91 5.28 5.62 3.19

11 1.70 1.97 2.54 4.22 3.89 8.52 8.72 3.79 5.20 5.30 5.34 2.99 12 1.89 2.08 2.60 4.23 3.55 8.45 8.40 3.70 5.62 5.16 5.15 3.09 13 1.93 2.21 2.43 4.07 3.23 8.36 8.01 3.57 5.89 5.03 5.06 3.19 14 2.10 2.25 2.74 4.08 3.01 8.03 7.64 3.38 6.19 4.98 4.98 3.22 15 2.12 1.77 3.42 4.06 2.92 7.78 7.31 3.21 6.46 4.89 4.93 2.97

16 2.07 2.02 4.20 4.04 2.93 7.65 7.02 3.04 6.66 4.60 4.81 2.96 17 2.08 2.37 4.67 4.02 2.85 7.66 6.74 2.83 6.72 4.31 4.69 2.87 18 2.00 1.83 4.70 3.90 2.67 7.82 6.52 2.67 6.69 4.05 4.62 2.76 19 2.04 2.07 4.71 3.92 2.70 8.05 6.33 2.62 6.64 3.71 4.64 2.77 20 2.06 1.72 4.60 3.81 2.88 8.69 6.19 2.65 6.52 3.38 4.65 2.77

21 2.10 1.36 --- 3.51 2.94 9.27 6.07 2.84 6.39 3.18 4.39 2.87 22 2.19 1.40 --- 3.60 3.15 9.54 5.91 3.53 6.25 3.08 4.05 2.72 23 1.99 2.01 --- 4.12 3.28 9.54 5.70 4.31 6.13 3.09 3.81 2.61 24 1.81 2.78 --- 4.71 3.40 9.58 5.48 4.83 5.89 3.35 3.59 2.67 25 1.86 3.52 --- 5.14 3.74 9.93 5.28 5.03 5.61 3.46 3.39 2.70

26 2.10 2.88 --- 5.36 4.08 10.24 5.14 4.95 5.27 3.24 3.25 2.55 27 2.16 2.56 --- 5.48 4.26 10.16 5.05 4.64 4.84 3.17 3.17 2.55 28 2.05 2.46 --- 5.48 4.40 9.79 5.02 4.30 4.49 3.09 3.14 2.59 29 2.16 2.59 --- 5.44 --- 9.45 4.99 3.96 4.26 3.06 3.05 2.55 30 2.12 2.62 --- 5.42 --- 9.04 4.95 3.65 4.29 3.02 3.01 2.21 31 2.06 --- --- 5.20 --- 8.58 --- 3.48 --- 3.10 3.01 ---

TOTAL 60.99 66.91 --- --- 104.81 244.21 201.90 119.90 155.70 131.04 137.70 87.93 MEAN 1.97 2.23 --- --- 3.74 7.88 6.73 3.87 5.19 4.23 4.44 2.93 MAX 2.19 3.52 --- --- 4.95 10.24 8.74 5.03 6.72 5.30 6.35 3.32 MIN 1.20 1.36 --- --- 2.67 4.48 4.95 2.62 3.35 3.02 3.01 2.21

e Estimated113 ECONFINA CREEK BASIN

02359315 MARTIN BAYOU AT US 98 AT SPRINGFIELD, FL

LOCATION.--Lat 30 ° 08'06", long 85 ° 36'56", in SE 1 ⁄ 4 sec. 14, T. 4 S., R. 14 W., Bay County, Hydrologic Unit 03140101, at upstream side of concrete weir control structure above U.S. Highway 98, at boundary of Parker and Springfield communities, 0.9 mi wes t of State Road 22-A, and 1.2 mi south of State Highway 22.

DRAINAGE AREA.--3.96 mi 2

.
PERIOD OF RECORD.--October 1998 to current year.

GAGE.--Water-stage recorder and crest-stage gage.

REMARKS.--Records poor.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 3.0 5.1 8.5 e19 14 13 31 13 10 24 18 50 2 2.9 5.4 8.6 28 14 12 26 13 11 21 20 51 3 3.0 5.6 7.9 e24 13 12 24 13 11 22 17 47 4 3.1 5.5 7.6 e20 11 19 26 13 10 19 17 50 5 3.2 e5.5 6.8 e17 11 14 26 12 10 19 40 61

6 3.9 e5.6 7.6 e13 10 10 25 12 9.7 29 107 66 7 4.4 5.6 7.7 9.5 10 8.5 24 12 9.1 29 72 68 8 3.3 6.0 7.7 9.0 9.7 7.7 23 12 9.1 26 39 81 9 1.9 14 7.9 8.2 9.6 15 24 12 10 24 25 59 10 1.8 16 e8.3 7.6 12 23 24 12 14 24 20 47

11 2.2 9.8 8.7 8.7 11 18 26 12 46 40 16 38 12 2.2 7.4 e8.7 10 12 22 26 12 108 36 16 33 13 2.4 6.7 8.7 9.3 12 36 27 12 62 31 19 33 14 2.8 7.9 10 8.9 12 30 28 12 43 e26 23 30 15 3.1 6.2 11 8.9 12 41 29 11 31 e22 24 30

16 3.2 6.6 10 9.3 12 36 29 11 25 17 20 29 17 3.5 19 8.8 8.9 11 28 26 10 21 27 e19 28 18 3.8 15 7.6 8.9 10 32 23 10 19 81 e30 28 19 4.1 14 8.0 13 9.4 34 23 9.9 17 63 e25 28 20 e3.9 12 6.5 17 8.9 55 23 10 16 43 e20 29

21 e3.7 10 8.0 14 9.8 45 e24 10 15 41 e40 32 22 e3.5 9.0 8.4 12 10 37 25 11 17 44 e45 32 23 e3.4 8.6 9.7 11 10 32 25 11 27 36 43 29 24 3.2 16 7.2 9.9 10 28 25 10 23 34 41 71 25 3.4 34 6.9 9.6 11 29 22 10 19 37 40 117

26 3.2 22 6.4 9.1 e13 26 18 10 16 33 39 79 27 3.2 15 6.7 8.9 15 23 16 9.9 16 29 37 60 28 3.6 12 e9.9 9.3 14 22 15 9.9 15 26 32 48 29 4.2 11 13 9.5 --- 40 14 9.6 15 26 29 38 30 4.6 9.4 10 12 --- 40 14 9.2 19 14 31 33 31 4.9 --- 9.5 14 --- 35 --- 9.2 --- 15 32 ---

MEAN 3.31 10.9 8.46 12.2 11.3 26.6 23.7 11.1 22.5 30.9 32.1 47.5

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 20.3 14.9 10.3 15.3 9.08 16.8 12.8 12.0 13.4 15.6 16.7 19.9

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 7.00 20.0 14.8 HIGHEST DAILY MEAN 64 Mar 30 117 Sep 25 e480 Oct 1 1998 LOWEST DAILY MEAN 1.4 Jul 22 1.8 Oct 10 1.4 Jul 22 2000 ANNUAL SEVEN-DAY MINIMUM 2.1 Jul 17 2.3 Oct 9 2.1 Jul 17 2000 MAXIMUM PEAK FLOW 143 Jun 11 e480 Oct 1 1998 MAXIMUM PEAK STAGE 10.92 Jun 11 10.92 Jun 11 2001 INSTANTANEOUS LOW FLOW 1.3 Oct 9 .90 Jul 21 2000 10 PERCENT EXCEEDS 12 40 32 50 PERCENT EXCEEDS 5.6 14 9.1 90 PERCENT EXCEEDS 3.0 5.6 3.9

e Estimated114 ECONFINA CREEK BASIN

02359500 ECONFINA CREEK NEAR BENNETT, FL.

LOCATION.--Lat 30 ° 23'04", long 85 ° 33'24", in SE 1 ⁄ 4 sec. 20, T. 1 S., R. 13 W., Bay County, Hydrologic Unit 03140101, near center of span on downstream side of bridge on State Highway 388, 0.5 mi downstream from Old Mill Branch, 1.6 mi southwest of Bennett, and 11 mi upstream from mouth.

DRAINAGE AREA.--122 mi 2

. PERIOD OF RECORD.--October 1935 to September 1994. Monthly discharge only for October and November 1936, published in WSP1304. October 1998 to current year.

REVISED RECORDS.--WSP 872: 1937. WSP 1906: Drainage area. WRD FL-80-4: 1979. WRD FL-93-4: 1948 (M), 1989 (M).

GAGE.--Water-stage recorder. Datum of gage is 1.03 ft above National Geodetic Vertical Datum of 1929. Nov. 11, 1935 to Jan. 29, 1962, nonrecording gage and Jan. 30, 1962 to June 16, 1966, water-stage recorder at site 150 ft downstream at present datum. June 17, 1966 to Sept. 28, 1966, nonrecording gage and Oct. 1, 1966 to Sept. 30, 1994, water-stage recorder at present site and datum.

REMARKS.--Records good. Flow includes large ground-water inflow.

EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum stage since September 1926, 15.0 ft present datum, from floodmark, discharge not determined.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 321 287 326 342 324 305 411 287 305 405 e350 498 2 317 289 323 334 321 308 364 284 334 434 e400 574 3 314 289 322 330 318 308 348 283 336 437 e450 614 4 311 289 320 327 317 342 371 280 318 416 e550 575 5 310 289 320 326 314 365 406 278 291 380 e700 535

6 307 290 320 326 311 335 389 275 275 450 e900 487 7 311 292 320 324 305 318 355 273 270 379 969 565 8 321 293 320 323 302 301 344 270 268 373 927 667 9 321 306 320 322 300 294 338 269 272 373 763 568 10 314 335 320 320 307 310 333 268 292 347 596 495

11 310 338 320 320 319 309 330 271 384 343 553 472 12 307 324 320 325 318 305 326 314 722 401 509 447 13 304 316 320 329 314 491 324 303 783 367 494 454 14 301 313 320 328 311 566 326 284 550 346 502 453 15 298 310 324 324 310 552 354 273 420 340 517 439

16 298 310 331 321 310 561 365 267 406 335 486 430 17 295 323 332 320 309 476 359 265 412 328 477 421 18 295 330 328 318 305 426 338 263 367 328 489 397 19 294 332 326 321 299 439 328 261 346 328 494 395 20 292 372 326 337 297 583 323 262 340 332 572 406

21 292 353 326 356 295 641 321 267 356 333 511 420 22 292 333 326 339 296 526 320 270 345 330 464 403 23 292 325 326 330 296 444 317 271 339 327 440 410 24 289 324 325 326 291 406 314 266 336 324 427 591 25 289 432 322 322 291 373 311 260 330 323 415 572

26 289 456 320 320 294 357 305 256 324 343 402 486 27 289 374 320 320 295 349 300 253 319 352 393 443 28 288 340 323 317 292 341 298 252 352 344 383 430 29 287 332 451 317 --- 398 296 253 413 347 381 418 30 286 327 449 319 --- 487 292 262 420 345 387 403 31 287 --- 365 322 --- 462 --- 298 --- 363 415 ---

MEAN 301 327 333 326 306 409 337 272 374 360 526 482 MAX 321 456 451 356 324 641 411 314 783 450 969 667 MIN 286 287 320 317 291 294 292 252 268 323 350 395 IN. 2.84 3.00 3.14 3.08 2.61 3.87 3.08 2.57 3.42 3.41 4.98 4.41

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1936 - 2001, BY WATER YEAR (WY)

MEAN 509 501 512 538 547 581 562 506 515 555 574 558 MAX 1261 890 818 780 838 1045 1176 789 958 1005 962 824 (WY) 1995 1948 1948 1993 1986 1991 1948 1946 1989 1994 1939 1937 MIN 301 323 317 326 306 358 332 272 334 337 339 344 (WY) 2001 1956 1956 2001 2001 1956 1956 2001 2000 2000 2000 1955

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1936 - 2001

ANNUAL MEAN 366 363 538 HIGHEST ANNUAL MEAN 1261 1995 LOWEST ANNUAL MEAN 363 2001 HIGHEST DAILY MEAN 647 Feb 15 969 Aug 7 4670 Mar 3 1991 LOWEST DAILY MEAN 286 Oct 30 252 May 28 252 May 28 2001 ANNUAL SEVEN-DAY MINIMUM 288 Oct 26 257 May 24 257 May 24 2001 MAXIMUM PEAK FLOW 982 Aug 8 5850 Mar 3 1991 MAXIMUM PEAK STAGE 7.84 Aug 8 14.37 Mar 3 1991 INSTANTANEOUS LOW FLOW 250 May 28 250 May 28 2001 ANNUAL RUNOFF (INCHES) 40.80 40.41 59.93 10 PERCENT EXCEEDS 450 490 704 50 PERCENT EXCEEDS 342 326 507 90 PERCENT EXCEEDS 301 288 395

e Estimated115 CHOCTAWHATCHEE RIVER BASIN

02365200 CHOCTAWHATCHEE RIVER NEAR PITTMAN, FL

LOCATION.--Lat 30 ° 56'59", long 85 ° 50'35", in NW 1 ⁄ 4 sec. 9, T. 6 N., R. 16 W., Holmes County, Hydrologic Unit 03140203, on downstream side of bridge on State Highway 2, 1.5 mi west of Pittman, 3.8 mi downstream from Florida-Alabama State line, and 84 mi upstream from mouth.

DRAINAGE AREA.--3,209 mi 2

. PERIOD OF RECORD.--May 1957, April 1960 and October 1975 to June 1976 (gage height and discharge measurements only), July 1976 to September 1981, October 1996 to September 1998 (gage height and discharge measurements only), October 1998 to current
year.

GAGE.--Water-stage recorder. Datum of gage is 51.83 ft above National Geodetic Vertical Datum of 1929 (levels by Northwest Florida Water Management District). Apr. 8, 1957 to Sept. 15, 1976, nonrecording gage at same site and datum, July 1, 1976 t o Sept. 30, 1981, water stage recorder, Oct. 1, 1996 to Sept. 30, 1998, nonrecording gage.

REMARKS.-- Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 733 458 1440 10100 4980 3330 8830 2130 1290 2890 2020 1420 2 675 459 1310 9070 4430 3730 8080 2000 e2500 3870 2420 1710 3 630 463 1220 6900 3940 4130 7350 1910 e2000 4190 1810 2140 4 594 465 1140 4970 3510 11100 7380 1840 1540 3550 1420 2390 5 574 466 1090 4010 3180 20600 9600 1720 1370 2970 1190 3300

6 567 469 1060 3380 2890 28900 14800 1650 1200 2550 1870 3200 7 617 471 1040 3010 2600 30800 17100 1580 1100 2350 4600 3390 8 765 486 1020 2760 2410 27000 15900 1490 1070 2000 6390 3270 9 725 710 1010 2610 2300 21900 13300 1450 e1500 1720 5770 2640 10 631 1430 1010 2480 2320 18800 10600 1400 e2500 1520 4850 2160

11 596 2130 1010 2380 2760 15100 8750 1370 e5500 1420 4020 1810 12 575 1670 1010 2400 3040 10900 7260 1360 e8500 2200 4380 1570 13 555 1370 997 2490 2880 13200 6120 1600 12000 1990 3800 1470 14 544 1260 1430 2430 2700 17000 5520 1610 13100 1620 3460 1360 15 526 1250 2370 2330 2540 23100 5170 1490 11400 1380 3240 1260

16 518 1140 2990 2270 2420 23800 5170 1400 e9500 1290 2940 1170 17 513 1180 4910 2350 2340 21800 4980 1290 e7000 1200 2690 1100 18 505 1420 5700 2830 2290 18700 4530 1210 5240 1070 2580 1050 19 502 1870 4830 3300 2200 14500 4040 1130 4170 1020 2580 995 20 496 2500 3750 4410 2070 13300 3700 1150 3530 969 2540 980

21 489 2660 3150 5850 2000 16200 3460 1840 3250 947 2680 946 22 483 2100 2700 5650 1960 20600 3250 2170 2990 1070 2380 948 23 476 1700 2530 4570 2000 20700 3060 1700 3150 1140 1950 903 24 470 1500 2300 3950 2080 18300 2900 1650 3340 1040 1690 936 25 461 2010 2090 3520 2060 15300 3030 1630 3120 955 1550 1220

26 459 2870 1910 3080 2210 12800 2880 1620 2780 1300 1420 1440 27 461 2810 1780 2760 3390 10400 2750 1530 2430 1570 1360 1390 28 458 2210 2280 2560 3440 8720 2580 1510 2110 1840 1270 1310 29 456 1880 5040 2420 --- 8140 2480 1490 1880 1940 1310 1230 30 456 1630 8570 2720 --- 8590 2330 1390 2080 2000 1330 1070 31 460 --- 10300 4130 --- 9100 --- 1310 --- 1900 1420 ---

MEAN 547 1435 2677 3796 2748 15820 6563 1568 4105 1854 2675 1659 MAX 765 2870 10300 10100 4980 30800 17100 2170 13100 4190 6390 3390 MIN 456 458 997 2270 1960 3330 2330 1130 1070 947 1190 903 IN. .20 .50 .96 1.36 .89 5.69 2.28 .56 1.43 .67 .96 .58

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1976 - 2001, BY WATER YEAR (WY)

MEAN 2996 2938 4000 6126 6445 10410 6633 4303 3113 2637 2346 1946 MAX 9492 5727 10700 15520 12730 18540 15910 12040 6725 5871 3933 3777 (WY) 1999 1978 1977 1978 1979 1980 1980 1978 1978 1999 1978 1977 MIN 547 1342 2008 1971 2625 3024 1727 622 534 432 568 747 (WY) 2001 2000 2000 1981 2000 2000 2000 2000 2000 2000 2000 2000

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1976 - 2001

ANNUAL MEAN 1473 3800 4467 HIGHEST ANNUAL MEAN 7220 1978 LOWEST ANNUAL MEAN 1480 2000 HIGHEST DAILY MEAN 10300 Dec 31 30800 Mar 7 64000 Jan 28 1978 LOWEST DAILY MEAN 327 Jul 21 456 Oct 29 327 Jul 21 2000 ANNUAL SEVEN-DAY MINIMUM 355 Jul 17 458 Oct 26 355 Jul 17 2000 MAXIMUM PEAK FLOW 31300 Mar 7 64700 Jan 28 1978 MAXIMUM PEAK STAGE 24.49 Mar 7 28.56 Jan 28 1978 INSTANTANEOUS LOW FLOW 440 Oct 29 308 Jul 21 2000 ANNUAL RUNOFF (INCHES) 6.25 16.08 18.91 10 PERCENT EXCEEDS 3130 9260 9900 50 PERCENT EXCEEDS 949 2200 2660 90 PERCENT EXCEEDS 398 696 1090

e Estimated116 CHOCTAWHATCHEE RIVER BASIN

02365470 WRIGHTS CREEK AT SH 177A NEAR BONIFAY, FL

LOCATION.--Lat 30 ° 51'25", long 85 ° 45'44", in NW 1 ⁄ 4 sec. 8, T. 5 N., R. 17 S., Holmes County, Hydrologic Unit 03140203, on downstream side of bridge on U.S. Highway 177A, 0.4 mi above Caney Branch, 7.3 mi upstream of mouth, and 7.6 mi northwest of Bonifay.

DRAINAGE AREA.--148 mi 2

. PERIOD OF RECORD.--March 1983 to September 1987, discharge measurements and annual maximum discharge, October 1998 to current
year.

GAGE.--Water-stage recorder. Datum of gage is 42.94 ft above National Geodetic Vertical Datum of 1929. Mar. 23, 1983 to Sept. 30, 1987, nonrecording gage and crest-stage gage at same site and datum.

REMARKS.--No estimated daily discharges. Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 34 24 95 511 286 90 484 61 43 107 277 97 2 34 24 86 374 241 147 394 59 283 113 322 125 3 32 24 80 303 199 220 327 56 300 99 267 169 4 30 25 76 264 176 389 354 55 221 83 174 192 5 29 25 73 239 161 1000 555 52 121 76 118 212

6 29 25 70 220 149 1200 739 50 82 74 343 168 7 36 25 68 202 138 667 652 47 68 66 853 147 8 46 25 67 190 130 438 474 47 65 60 780 126 9 40 36 66 179 130 328 375 45 93 57 698 106 10 36 47 66 166 133 278 318 44 184 54 568 96

11 34 65 65 158 149 261 274 44 299 61 460 93 12 32 52 64 191 152 309 242 43 890 78 453 90 13 31 43 63 226 138 849 214 42 982 79 461 111 14 30 39 123 210 129 1590 191 41 790 76 444 99 15 29 40 305 181 124 1710 180 40 646 63 423 82

16 29 39 391 163 120 1930 181 38 532 56 355 73 17 28 41 547 156 118 1790 224 38 351 50 392 67 18 27 50 597 150 115 1090 202 36 251 48 402 64 19 27 77 511 155 108 738 157 35 185 46 384 61 20 27 127 405 216 101 790 134 40 187 45 307 60

21 27 132 319 261 96 1020 119 41 181 47 287 58 22 26 85 274 244 95 1110 108 42 174 50 246 56 23 26 66 254 194 95 859 99 42 361 46 190 54 24 26 71 227 163 94 615 93 41 338 43 152 57 25 25 181 199 146 91 489 87 39 226 48 127 60

26 25 331 178 133 90 430 82 36 159 57 108 58 27 25 346 164 125 95 376 87 35 121 54 95 56 28 25 234 258 122 91 335 74 34 113 52 85 54 29 25 137 589 119 --- 372 69 35 107 65 81 51 30 24 109 670 154 --- 503 64 34 98 96 79 50 31 24 --- 667 263 --- 528 --- 33 --- 168 75 ---

MEAN 29.6 84.8 246 206 134 724 252 42.7 282 68.3 323 93.1 MAX 46 346 670 511 286 1930 739 61 982 168 853 212 MIN 24 24 63 119 90 90 64 33 43 43 75 50 IN. .23 .64 1.91 1.60 .94 5.64 1.90 .33 2.12 .53 2.52 .70

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 105 91.0 150 206 150 377 130 40.8 170 154 139 57.0 MAX 249 150 246 351 223 724 252 51.0 282 365 323 93.1 (WY) 1999 1999 2001 1999 1999 2001 2001 1999 2001 1999 2001 2001 MIN 29.6 38.0 44.1 60.5 94.6 202 67.9 28.5 31.6 29.8 21.5 38.4 (WY) 2001 2000 2000 2000 2000 2000 1999 2000 2000 2000 2000 2000

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 78.2 208 148 HIGHEST ANNUAL MEAN 208 2001 LOWEST ANNUAL MEAN 57.9 2000 HIGHEST DAILY MEAN 670 Dec 30 1930 Mar 16 1930 Mar 16 2001 LOWEST DAILY MEAN 16 Aug 18 24 Oct 30 16 Aug 18 2000 ANNUAL SEVEN-DAY MINIMUM 17 Aug 15 24 Oct 28 17 Aug 15 2000 MAXIMUM PEAK FLOW 2120 Mar 16 7200 Mar 6 1984 MAXIMUM PEAK STAGE 10.02 Mar 16 13.73 Mar 6 1984 INSTANTANEOUS LOW FLOW 24 Oct 31 15 Aug 21 2000 ANNUAL RUNOFF (INCHES) 7.19 19.08 13.57 10 PERCENT EXCEEDS 192 495 337 50 PERCENT EXCEEDS 42 111 70 90 PERCENT EXCEEDS 22 34 28117 CHOCTAWHATCHEE RIVER BASIN

02365500 CHOCTAWHATCHEE RIVER AT CARYVILLE, FL

LOCATION.--Lat 30 ° 46'32", long 85 ° 49'40", in NW 1 ⁄ 4 sec.10, T.4 N., R.16 W., Holmes County, Hydrologic Unit 03140203, near right bank on downstream side of bridge on U.S. Highway 90, 300 ft downstream from Louisville and Nashville Railroad bridge, 0.8 m i west of Caryville, 1.8 mi downstream from Wrights Creek, and 64 mi upstream from mouth.

DRAINAGE AREA.--3,499 mi 2

. PERIOD OF RECORD.--August 1929 to September 1994, October 1994 to September 1996(gage height only), October 1996 to September 1997, October 1997 to September 1998(gage height only), October 2000 to September 2001. Gage-height records collected at sam e site from 1928 to August 1929 are contained in reports of U.S. Weather Bureau.

GAGE.--Water-stage recorder. Datum of gage is 39.02 ft above National Geodetic Vertical Datum of 1929. Aug. 17 to Oct. 11, 1929

, nonrecording gage at same site and datum; Oct. 12, 1929 to Sept. 11, 1951, water-stage recorder at same site and datum; Sept

. 12, 1951 to Aug.11, 1976, nonrecording gage at same site and datum.

REMARKS.--Records good, except for estimated daily discharges, which are fair.

EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum stage since 1850 (from information furnished by U.S. Army Corps of Engineers, Mobil e District) 27.1 ft Mar. 17, 1929, from National Weather Service records and floodmarks; discharge, 206,000 ft 3 /s from rating curve extended above 160,000 ft 3 /s on basis of slope-area determination of peak flow.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 858 506 1790 e10000 e4000 e3600 e9500 2440 1560 2730 2290 1820 2 782 508 1590 e9800 e5000 e3800 e9100 2320 2150 3380 2670 2170 3 724 508 1460 e9000 e4500 e4100 e8000 2210 2840 3970 2660 2540 4 679 510 1360 e7000 e4000 e4600 e7200 2120 2430 4020 2200 2770 5 646 510 1300 e5000 e3500 e13000 6980 2040 1990 3630 1790 3200

6 640 515 e1280 e4000 e3250 e21000 9320 1960 1670 3150 1940 3680 7 654 519 e1260 e3300 e3000 e28500 13300 1870 1440 2820 3350 3840 8 696 526 e1240 e3000 e2700 e30000 18000 1810 1380 2600 5230 3980 9 802 580 e1220 e2800 e2500 e26000 17300 1750 1440 2300 5950 3640 10 744 890 e1200 e2700 e2300 e22000 14000 1710 1770 2060 5770 3060

11 673 1620 e1180 e2500 e2400 e19000 11600 1660 2440 1940 5180 2590 12 642 1950 e1160 e2300 e2800 e17000 9240 1620 4970 2160 4770 2280 13 620 1590 e1140 e2400 e3200 e15000 7130 1650 7960 2510 4700 2130 14 603 1380 e1120 e2500 e2900 e18500 5900 1870 11000 2270 4330 2000 15 589 1290 e1750 e2400 e2800 22300 5340 1810 13000 1950 4030 1840

16 575 1260 e2500 e2350 e2600 e27300 5060 1710 12100 1730 3760 1670 17 566 1200 e3500 e2300 e2500 e28000 4920 1600 9790 1610 3450 1550 18 559 1300 e4800 e2400 e2400 e23000 4760 1470 7450 1490 3290 1450 19 554 1650 e5700 e2800 e2300 e20000 4400 1370 5680 1390 3280 1360 20 549 2160 e5000 e3250 e2250 e16000 4020 1380 4590 1310 3260 1300

21 544 2710 e4000 e4500 e2200 e15000 3750 1490 4010 1260 3180 1260 22 536 2610 e3300 e5700 e2100 e17000 3520 2220 3680 1260 3110 1240 23 529 2110 e2800 e5600 e2000 e20800 3310 2160 3680 1410 2710 1200 24 523 1790 e2700 e4500 e2100 e21000 3140 1920 3850 1380 2330 1180 25 515 1900 e2500 e4000 e2200 e19000 3070 1870 3820 1310 2050 1280

26 507 2560 e2300 e3500 e2300 e16000 3050 1880 3500 1390 1870 1580 27 505 3200 e2100 e3000 e2500 e13000 2950 1820 3120 1760 1700 1690 28 505 2980 e2000 e2800 e3400 e11000 2810 1710 2770 1940 1590 1600 29 504 2470 e2500 e2600 --- e9000 2680 1760 2520 2200 1560 1540 30 503 2070 e5500 e2500 --- e8100 2560 1690 2400 2260 1560 1430 31 506 --- e8000 e3000 --- e8800 --- 1590 --- 2380 1630 ---

MEAN 607 1512 2556 3984 2846 16820 6864 1822 4367 2180 3135 2096 MAX 858 3200 8000 10000 5000 30000 18000 2440 13000 4020 5950 3980 MIN 503 506 1120 2300 2000 3600 2560 1370 1380 1260 1560 1180 IN. .20 .48 .84 1.31 .85 5.54 2.19 .60 1.39 .72 1.03 .67

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1930 - 2001, BY WATER YEAR (WY)

MEAN 3084 3414 5324 7436 8450 10150 8569 4820 3776 4220 3907 3114 MAX 17160 11790 24150 23510 16190 29190 22900 15700 12450 42530 17120 16650 (WY) 1999 1990 1954 1936 1982 1998 1975 1946 1989 1994 1939 1937 MIN 607 992 1395 1925 2846 1777 2343 1618 1107 1187 856 905 (WY) 2001 1932 1956 1956 2001 1955 1967 1941 1988 1986 2000 1954

SUMMARY STATISTICS FOR 2001 WATER YEAR WATER YEARS 1930 - 2001

ANNUAL MEAN 4080 5481 HIGHEST ANNUAL MEAN 9163 1946 LOWEST ANNUAL MEAN 2714 1955 HIGHEST DAILY MEAN e30000 Mar 8 162000 Jul 9 1994 LOWEST DAILY MEAN 503 Oct 30 503 Oct 30 2000 ANNUAL SEVEN-DAY MINIMUM 505 Oct 26 505 Oct 26 2000 MAXIMUM PEAK FLOW e30000 Mar 8 164000 Jul 9 1994 MAXIMUM PEAK STAGE 23.85 Jul 9 1994 INSTANTANEOUS LOW FLOW 500 Oct 30 500 Oct 30 2000 ANNUAL RUNOFF (INCHES) 15.83 21.28 10 PERCENT EXCEEDS 9390 11400 50 PERCENT EXCEEDS 2400 3620 90 PERCENT EXCEEDS 736 1420

e Estimated118 CHOCTAWHATCHEE RIVER BASIN

02365769 BRUCE CREEK AT SH 81 NEAR REDBAY, FL

LOCATION.--Lat 30 ° 37'28", long 85 ° 56'33", in NE 1 ⁄ 4 sec. 33, T. 3 N., R. 17 W., Walton County, Hydrologic Unit 03140203, on downstream side of bridge on State Highway 81, 0.6 mi north of Bruce Creek School, 1.4 mi south of Knox Hill, and 2.4 mi north of Redbay.

DRAINAGE AREA.--82.4 mi 2

.
PERIOD OF RECORD.--October 1998 to current year.

GAGE.--Water-stage recorder.

REMARKS.--Records good, except for estimated daily discharges, which are fair.

REVISIONS.--Daily, monthly discharges, and extremes for water year 2000 were revised.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 41 36 17 34 51 45 59 21 5.0 37 45 8.6 2 33 104 17 35 47 40 48 18 4.9 25 55 24 3 29 82 16 35 44 38 43 16 4.8 15 44 25 4 29 46 16 35 41 36 42 15 5.0 13 37 21 5 37 37 17 40 39 34 41 15 4.9 10 28 15

6 40 33 20 43 37 32 36 17 5.0 8.1 21 13 7 35 31 25 36 36 31 33 15 8.0 6.8 16 34 8 30 29 26 34 36 30 31 14 7.2 5.8 24 96 9 28 28 24 32 35 29 29 13 5.7 5.1 34 59 10 44 27 23 39 34 29 28 12 5.2 5.3 26 37

11 143 27 24 101 33 31 27 11 4.8 11 24 29 12 123 26 24 68 33 62 26 11 4.6 6.4 22 25 13 57 25 25 50 35 83 26 10 4.7 6.1 16 25 14 51 25 30 50 271 49 33 9.5 4.6 11 13 26 15 43 24 35 48 366 40 60 8.9 4.7 18 9.4 23

16 36 24 29 42 167 53 52 8.5 5.5 11 7.7 33 17 32 23 26 37 85 228 38 8.1 14 7.4 6.6 26 18 29 22 25 35 80 213 31 7.7 15 5.8 5.9 17 19 27 21 37 34 77 97 28 7.6 12 4.8 5.4 13 20 25 21 79 34 65 192 25 7.4 8.7 4.3 5.1 11

21 25 22 70 34 52 177 24 7.1 6.8 4.0 5.0 18 22 24 23 196 32 44 95 22 7.0 6.0 4.0 4.8 106 23 24 26 166 34 41 74 19 6.8 6.2 3.9 5.1 361 24 23 24 69 172 39 73 27 6.7 11 3.9 5.1 382 25 21 24 57 284 38 70 49 6.3 15 5.0 4.8 178

26 20 24 50 138 36 65 45 6.1 13 5.7 4.7 144 27 20 24 43 75 37 76 32 6.0 13 24 4.6 181 28 20 23 39 70 59 88 27 5.6 16 55 4.9 77 29 20 21 37 69 60 64 27 5.4 31 28 5.4 53 30 21 19 35 65 --- 71 24 5.2 35 19 5.4 43 31 21 --- 34 56 --- 75 --- 5.1 --- 25 6.5 ---

MEAN 37.1 30.7 42.9 61.0 69.6 74.8 34.4 10.1 9.58 12.7 16.2 70.1 MAX 143 104 196 284 366 228 60 21 35 55 55 382 MIN 20 19 16 32 33 29 19 5.1 4.6 3.9 4.6 8.6 IN. .52 .42 .60 .85 .91 1.05 .47 .14 .13 .18 .23 .95

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2000, BY WATER YEAR (WY)

MEAN 271 89.7 113 146 98.0 167 41.2 32.6 97.1 153 77.0 51.7 MAX 504 149 184 231 127 260 48.0 55.2 185 292 138 70.1 (WY) 1999 1999 1999 1999 1999 1999 1999 1999 1999 1999 1999 2000 MIN 37.1 30.7 42.9 61.0 69.6 74.8 34.4 10.1 9.58 12.7 16.2 33.2 (WY) 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 1999

SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1999 - 2000

ANNUAL MEAN 124 39.0 112 HIGHEST ANNUAL MEAN 185 1999 LOWEST ANNUAL MEAN 39.0 2000 HIGHEST DAILY MEAN 1100 Mar 10 382 Sep 24 e4550 Oct 1 1998 LOWEST DAILY MEAN 16 Dec 3 3.9 Jul 23 3.9 Jul 23 2000 ANNUAL SEVEN-DAY MINIMUM 17 Nov 30 4.3 Jul 19 4.3 Jul 19 2000 MAXIMUM PEAK FLOW 429 Sep 24 e4550 Oct 1 1998 MAXIMUM PEAK STAGE 15.16 Sep 24 18.73 Mar 10 1999 INSTANTANEOUS LOW FLOW 3.7 Jul 23 3.7 Jul 23 2000 ANNUAL RUNOFF (INCHES) 20.41 6.44 18.46 10 PERCENT EXCEEDS 296 74 259 50 PERCENT EXCEEDS 69 27 46 90 PERCENT EXCEEDS 23 5.5 9.6

e Estimated119

CHOCTAWHATCHEE RIVER BASIN

02365769 BRUCE CREEK AT SH 81 NEAR REDBAY, FL--Continued

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 38 8.2 47 e295 122 75 217 28 32 92 244 88 2 34 8.2 44 e211 100 82 184 26 174 107 260 105 3 32 7.9 41 e183 95 69 167 25 97 68 190 238 4 29 8.0 39 e164 90 158 162 23 41 50 114 287 5 27 7.9 37 e150 84 262 203 21 27 43 86 285

6 25 8.1 36 e138 75 170 206 20 20 45 907 244 7 26 8.5 35 e129 66 203 170 19 17 48 2540 174 8 34 8.9 34 e121 61 353 191 19 15 34 1090 141 9 32 13 34 e114 58 459 227 18 16 27 528 157 10 26 84 36 e108 72 431 230 17 38 30 723 180

11 24 68 37 e105 112 354 209 16 91 64 500 108 12 22 37 35 e136 87 299 181 16 923 173 494 82 13 20 29 34 e160 72 630 152 14 1070 296 452 90 14 19 25 46 e138 67 947 138 14 371 202 485 83 15 17 23 140 e123 65 544 171 13 249 92 357 64

16 17 21 180 e115 63 628 336 12 199 58 288 53 17 15 21 e260 e110 60 525 325 11 210 42 217 e48 18 14 30 e295 e107 55 456 180 11 163 35 191 e46 19 14 54 e230 e126 49 410 119 11 131 32 489 e45 20 13 133 e167 e170 47 541 99 10 107 29 1510 e44

21 13 85 e138 e193 46 795 84 10 89 45 974 e44 22 13 47 e135 e180 56 480 71 11 71 54 372 e43 23 13 38 e112 e153 66 314 61 11 62 42 229 e43 24 12 37 e90 e130 55 316 53 11 56 30 170 e49 25 12 237 e82 115 50 318 48 10 45 40 133 e53

26 11 385 e76 101 65 294 43 9.3 40 256 108 e48 27 9.8 217 e94 89 72 259 38 8.8 35 225 92 e47 28 9.3 87 e150 82 59 228 34 8.6 28 306 80 e46 29 8.8 62 e460 78 --- 249 32 8.2 27 384 81 e45 30 8.4 53 e550 104 --- 353 30 8.6 46 344 102 e44 31 8.4 --- e540 158 --- 297 --- 11 --- 256 109 ---

MEAN 19.2 61.7 137 138 70.3 371 145 14.6 150 114 455 101 MAX 38 385 550 295 122 947 336 28 1070 384 2540 287 MIN 8.4 7.9 34 78 46 69 30 8.2 15 27 80 43 IN. .27 .84 1.91 1.93 .89 5.19 1.97 .20 2.03 1.60 6.37 1.37

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 187 80.4 121 144 88.9 235 75.9 26.6 115 140 203 68.1 MAX 504 149 184 231 127 371 145 55.2 185 292 455 101 (WY) 1999 1999 1999 1999 1999 2001 2001 1999 1999 1999 2001 2001 MIN 19.2 30.7 42.9 61.0 69.6 74.8 34.4 10.1 9.58 12.7 16.2 33.2 (WY) 2001 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000 1999

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 47.9 149 124 HIGHEST ANNUAL MEAN 185 1999 LOWEST ANNUAL MEAN 39.0 2000 HIGHEST DAILY MEAN 550 Dec 30 2540 Aug 7 e4550 Oct 1 1998 LOWEST DAILY MEAN 3.9 Jul 23 7.9 Nov 3 3.9 Jul 23 2000 ANNUAL SEVEN-DAY MINIMUM 4.3 Jul 19 8.1 Oct 31 4.3 Jul 19 2000 MAXIMUM PEAK FLOW 2970 Aug 7 e4550 Oct 1 1998 MAXIMUM PEAK STAGE 18.27 Aug 7 18.73 Mar 10 1999 INSTANTANEOUS LOW FLOW 7.6 Nov 3 3.7 Jul 23 2000 ANNUAL RUNOFF (INCHES) 7.92 24.57 20.50 10 PERCENT EXCEEDS 95 353 289 50 PERCENT EXCEEDS 29 75 54 90 PERCENT EXCEEDS 5.5 13 11

e Estimated120 CHOCTAWHATCHEE RIVER BASIN

02366500 CHOCTAWHATCHEE RIVER NEAR BRUCE, FL

LOCATION.--Lat 30 ° 27'03", long 85 ° 53'54", in NE 1 ⁄ 4 sec. 36, T. 1 N., R. 17 W., Walton County, Hydrologic Unit 03140203, near center of main channel on upstream side of bridge on State Highway 20, 4.0 mi southeast of Bruce, 5.8 mi downstream from Holmes Creek, and 21 mi upstream from mouth.

DRAINAGE AREA.--4,384 mi 2

. PERIOD OF RECORD.--October 1930 to March 1983; Apr. 1983 to May 1984 (discharge measurements only); June 1984 to current year.

REVISED RECORDS.--WSP 872: 1937. WSP 1384: Drainage area. WSP 1504: 1931-34.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929. Apr. 1, 1983 to May 14, 1999, nonrecording gage at same site and datum. Apr. 6, 1934 to Mar. 31, 1983, water-stage recorder at same site at datum 3.94 ft lower. Oct. 1, 1930 to Apr. 5, 1934, nonrecording gage at site 1.0 mi downstream at datum 4.19 ft lower.

REMARKS.--No estimated daily discharges. Records good.

EXTREMES OUTSIDE OF PERIOD OF RECORD.--Flood of March 1929 reached a stage of 25.0 ft at former site and datum, from floodmarks

, discharge, 220,000 ft 3 /s, from rating curve extended above 145,000 ft 3 /s.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 1870 1250 3400 5540 4080 3510 12500 3440 2410 3700 3740 2810 2 1770 1250 3080 6100 4230 3790 11300 3310 2510 3720 3940 3020 3 1680 1240 2760 7150 4530 3940 10800 3170 2670 3830 4140 3380 4 1610 1230 2530 8480 4870 4200 10800 3040 2940 3960 4260 3750 5 1540 1230 2390 9560 5050 4420 10400 2920 3060 4150 4190 4010

6 1510 1240 2270 9760 5030 4780 9860 2810 2890 4280 4660 4160 7 1460 1310 2180 9030 4820 5540 9350 2720 2610 4240 5410 4400 8 1430 1310 2130 7750 4520 8650 9640 2640 2360 4010 6090 4630 9 1420 1380 2100 6500 4210 21000 12000 2550 2230 3730 6750 4800 10 1480 1470 2070 5470 3990 28800 16200 2480 2270 3460 7610 4930

11 1500 1600 2050 4840 3840 29400 18100 2420 2530 3560 8900 4910 12 1460 1940 2030 4440 3740 27500 17300 2370 3070 3460 10100 4610 13 1430 2300 2010 4270 3760 25400 15300 2330 3830 3400 10100 4170 14 1420 2380 2050 4130 3830 23000 13200 2310 4700 3580 9510 3760 15 1400 2240 2180 4030 3890 20800 11300 2360 5740 3530 8810 3470

16 1390 2120 2530 3950 3850 19800 9640 2400 7680 3190 8140 3230 17 1380 2120 3160 3880 3770 22800 8440 2360 10400 2870 7420 2980 18 1370 2070 3730 3780 3640 28000 7480 2300 12000 2650 6830 2770 19 1360 2110 4160 3780 3530 29900 6770 2200 11800 2450 6280 2610 20 1340 2360 4600 3910 3440 29200 6190 2120 10600 2330 5980 2490

21 1320 2640 4990 4150 3360 26600 5730 2100 9060 2250 5870 2390 22 1310 2910 5380 4440 3270 23600 5310 2110 7660 2150 5810 2310 23 1310 3070 5530 4770 3180 21600 4920 2370 6310 2100 5510 2260 24 1270 3090 5300 5150 3110 21800 4600 2580 5360 2140 5090 2600 25 1260 3230 4880 5480 3080 24200 4310 2550 4810 2250 4580 2670

26 1270 3290 4450 5620 3130 25100 4080 2480 4550 2350 4030 2530 27 1280 3420 4080 5450 3110 23700 3910 2420 4420 2490 3570 2510 28 1280 3590 3910 5070 3200 21500 3800 2400 4260 2690 3220 2580 29 1270 3690 4290 4640 --- 19000 3710 2350 4050 2920 2980 2550 30 1270 3620 4870 4320 --- 16600 3580 2350 3830 3230 2840 2470 31 1260 --- 5220 4120 --- 14300 --- 2330 --- 3510 2790 ---

MEAN 1417 2223 3429 5470 3859 18790 9017 2525 5087 3167 5779 3325 MAX 1870 3690 5530 9760 5050 29900 18100 3440 12000 4280 10100 4930 MIN 1260 1230 2010 3780 3080 3510 3580 2100 2230 2100 2790 2260 IN. .37 .57 .90 1.44 .92 4.94 2.30 .66 1.29 .83 1.52 .85

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1931 - 2001, BY WATER YEAR (WY)

MEAN 4480 4346 6336 9092 10490 12370 10790 6317 5127 5617 5830 4529 MAX 24890 13870 25970 29400 20460 31510 27220 20870 18080 48020 26770 24000 (WY) 1999 1931 1954 1936 1978 1998 1975 1946 1973 1994 1939 1937 MIN 1399 1742 1945 2344 3859 2534 3476 1774 1430 1368 1420 1626 (WY) 1969 1955 1956 1956 2001 1955 2000 2000 2000 2000 2000 1968

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1931 - 2001

ANNUAL MEAN 2579 5358 7094 HIGHEST ANNUAL MEAN 11620 1948 LOWEST ANNUAL MEAN 2711 2000 HIGHEST DAILY MEAN 6710 Mar 27 29900 Mar 19 164000 Jul 11 1994 LOWEST DAILY MEAN 1100 Jul 23 1230 Nov 4 1100 Jul 23 2000 ANNUAL SEVEN-DAY MINIMUM 1120 Jul 20 1240 Oct 31 1120 Jul 20 2000 MAXIMUM PEAK FLOW 30200 Mar 19 165000 Jul 11 1994 MAXIMUM PEAK STAGE 15.56 Mar 19 26.76 Jul 11 1994 INSTANTANEOUS LOW FLOW 1210 Nov 6 1070 Jul 23 2000 ANNUAL RUNOFF (INCHES) 8.01 16.59 21.99 10 PERCENT EXCEEDS 4820 10700 14000 50 PERCENT EXCEEDS 2000 3720 4960 90 PERCENT EXCEEDS 1240 1530 2300121 ALAQUA CREEK BASIN

02366996 ALAQUA CREEK NEAR PLEASANT RIDGE, FL

LOCATION.--Lat 30 ° 40'08", long 86 ° 11'12" in SW 1 ⁄ 4 sec. 18, T. 2 N., R. 19 W., Walton County, Hydrologic unit 03140102, at bridge on Nelson Road, 0.3 mi downstream from Cosson Mill Creek, 0.6 mi upstream from Oakie Creek, 1.5 mi southwest of Sconiers Mill, and 1.9 mi south of Pleasant Ridge.

DRAINAGE AREA.--39.1 mi 2

.
PERIOD OF RECORD.--October 1998 to current year.

GAGE.--Water-stage recorder. Elevation of gage is National Geodetic Vertical Datum of 1929, from topographic map.

REMARKS.--Records good, except for estimated daily discharges, which are fair.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 34 26 45 94 e110 e65 88 55 73 71 65 121 2 33 26 44 88 e95 e75 83 54 60 54 55 88 3 32 26 44 84 e90 e90 81 53 46 62 48 120 4 31 26 43 82 e85 e250 103 52 41 48 45 109 5 31 26 43 80 e80 73 123 51 39 55 45 152

6 35 28 42 77 e75 65 88 51 37 58 289 84 7 54 28 42 75 e72 61 82 50 37 46 200 77 8 36 29 41 76 e70 59 79 53 44 47 109 79 9 33 113 41 72 e78 72 77 51 53 43 168 78 10 32 107 41 70 e90 100 75 50 55 45 83 67

11 32 46 42 74 e93 68 72 49 269 57 82 64 12 31 40 41 101 e85 76 70 48 376 60 97 74 13 30 38 39 77 e80 e210 69 47 122 51 147 84 14 29 39 119 72 e79 108 83 45 115 44 139 66 15 29 35 73 70 e78 456 92 45 77 41 193 60

16 29 36 109 74 e78 247 132 44 62 39 90 58 17 28 77 279 73 e79 115 80 44 56 38 90 56 18 28 61 83 69 e75 126 73 43 51 39 123 55 19 28 136 93 147 e70 127 70 44 48 38 226 54 20 29 79 76 152 e65 568 68 51 49 44 311 54

21 30 54 69 86 e63 246 66 46 63 54 115 53 22 29 49 106 79 e62 143 64 47 52 43 86 51 23 28 47 74 74 e65 114 63 48 56 39 77 51 24 28 62 67 72 e62 99 62 44 47 37 72 54 25 28 247 63 e71 e61 97 62 43 44 58 69 58

26 27 75 60 e70 e70 92 60 42 43 57 66 52 27 27 58 74 e70 e64 88 58 42 42 71 64 52 28 27 52 694 e71 e60 86 57 42 44 73 64 51 29 27 49 310 e73 --- 176 56 42 55 68 67 49 30 27 46 131 e160 --- 138 55 41 56 86 75 48 31 27 --- 102 e170 --- 95 --- 40 --- 89 67 ---

MEAN 30.6 58.7 101 87.2 76.2 141 76.4 47.0 73.7 53.4 111 70.6 MAX 54 247 694 170 110 568 132 55 376 89 311 152 MIN 27 26 39 69 60 59 55 40 37 37 45 48 IN. .90 1.68 2.98 2.57 2.03 4.17 2.18 1.39 2.10 1.57 3.26 2.02

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 201 90.1 106 101 80.3 123 67.7 51.3 70.3 75.0 81.9 66.4 MAX 491 151 137 139 96.3 156 79.7 73.9 102 140 111 79.7 (WY) 1999 1999 1999 1999 1999 1999 1999 1999 1999 1999 2001 1999 MIN 30.6 58.7 79.2 77.3 68.7 70.5 47.1 33.0 35.7 32.1 31.1 48.7 (WY) 2001 2001 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 52.9 77.3 93.1 HIGHEST ANNUAL MEAN 147 1999 LOWEST ANNUAL MEAN 55.4 2000 HIGHEST DAILY MEAN 694 Dec 28 694 Dec 28 e4400 Oct 1 1998 LOWEST DAILY MEAN 22 Aug 13 26 Nov 1 22 Aug 13 2000 ANNUAL SEVEN-DAY MINIMUM 23 Aug 13 26 Oct 30 23 Aug 13 2000 MAXIMUM PEAK FLOW 838 Dec 28 e4400 Oct 1 1998 MAXIMUM PEAK STAGE 52.48 Dec 28 52.48 Dec 28 2000 INSTANTANEOUS LOW FLOW 25 Nov 1 21 Aug 18 2000 ANNUAL RUNOFF (INCHES) 18.40 26.85 32.35 10 PERCENT EXCEEDS 76 121 157 50 PERCENT EXCEEDS 41 63 67 90 PERCENT EXCEEDS 27 35 32

e Estimated122 YELLOW RIVER BASIN

02367900 YELLOW RIVER NEAR OAK GROVE, FL

LOCATION.--Lat 30 ° 55'34", long 86 ° 33'34" in SE 1 ⁄ 4 sec. 17, T. 5 N., R. 23 W., Okaloosa County, Hydrologic Unit 03140103, at bridge on downstream side at State Highway 2, 0.7 mi east of Oak Grove, and 58 mi above mouth.

DRAINAGE AREA.--525 mi 2 , approximately.

PERIOD OF RECORD.--September 1966 to October 1968, (annual maximum and gage height only), October 1998 to current year.

GAGE.--Water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929. Prior to Oct. 1, 1968, nonrecording gag e at same site and datum.

REMARKS.--No estimated daily discharges. Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 113 86 284 1010 1040 638 1910 359 307 590 660 444 2 108 86 266 751 882 899 1440 343 265 520 611 513 3 104 86 254 634 710 1080 1150 328 234 464 460 838 4 100 87 249 575 610 2760 1140 315 212 407 370 1020 5 97 87 247 540 555 7010 2040 302 195 373 312 1010

6 101 93 244 517 519 10900 2960 290 184 374 788 1130 7 125 111 237 510 494 8380 2780 279 178 323 1620 1120 8 110 135 231 499 476 4380 1940 270 177 299 1970 1910 9 115 204 230 482 462 1960 1310 265 216 277 2180 2000 10 132 210 229 472 526 1350 1090 275 274 269 1880 1220

11 128 220 229 462 622 1340 956 259 730 272 1110 877 12 118 236 227 470 665 1600 864 254 2270 279 911 658 13 110 215 224 482 615 2960 791 248 3290 331 836 547 14 108 207 417 472 557 4160 752 308 4470 307 797 480 15 104 189 504 458 521 5930 775 286 4250 270 804 433

16 101 200 789 456 501 5910 869 256 2670 250 699 393 17 99 293 948 510 499 4640 808 234 1130 230 595 361 18 96 282 818 620 499 3320 750 219 760 212 606 338 19 94 444 672 684 495 2040 639 232 595 199 855 322 20 94 485 599 853 464 2370 570 436 494 189 1450 313

21 94 443 535 1040 442 4010 530 316 498 226 1720 304 22 92 380 509 946 437 6210 501 305 468 762 1410 295 23 91 323 511 769 435 6410 475 277 454 722 813 286 24 91 297 484 646 429 4430 456 249 536 442 581 282 25 91 397 442 576 420 2370 456 235 520 340 478 281

26 91 461 407 533 431 1590 503 222 427 324 413 273 27 90 489 381 504 731 1410 473 212 370 339 370 270 28 89 424 517 484 731 1260 431 210 338 334 357 263 29 89 357 980 472 --- 1490 403 281 320 400 434 254 30 87 312 1340 608 --- 2090 377 355 395 587 455 244 31 86 --- 1300 985 --- 2210 --- 340 --- 676 451 ---

MEAN 102 261 494 614 563 3455 1005 283 908 374 871 623 MAX 132 489 1340 1040 1040 10900 2960 436 4470 762 2180 2000 MIN 86 86 224 456 420 638 377 210 177 189 312 244 IN. .23 .57 1.12 1.39 1.15 7.81 2.20 .64 1.99 .85 1.97 1.36

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 2155 542 596 842 583 1741 620 364 636 627 468 324 MAX 6104 1093 901 1385 668 3455 1005 632 908 1391 871 623 (WY) 1999 1999 1999 1999 1999 2001 2001 1999 2001 1999 2001 2001 MIN 102 261 394 528 520 558 405 176 157 117 136 140 (WY) 2001 2001 2000 2000 2000 2000 2000 2000 2000 2000 2000 2000

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 299 799 796 HIGHEST ANNUAL MEAN 1286 1999 LOWEST ANNUAL MEAN 305 2000 HIGHEST DAILY MEAN 1420 Feb 16 10900 Mar 6 66100 Oct 1 1998 LOWEST DAILY MEAN 86 Oct 31 86 Oct 31 86 Oct 31 2000 ANNUAL SEVEN-DAY MINIMUM 86 Oct 30 86 Oct 30 86 Oct 30 2000 MAXIMUM PEAK FLOW 11300 Mar 6 66100 Oct 1 1998 MAXIMUM PEAK STAGE 92.53 Mar 6 108.42 Sep 30 1998 INSTANTANEOUS LOW FLOW 84 Oct 31 84 Oct 31 2000 ANNUAL RUNOFF (INCHES) 7.98 21.27 21.20 10 PERCENT EXCEEDS 567 1780 1420 50 PERCENT EXCEEDS 210 456 414 90 PERCENT EXCEEDS 99 127 135123 YELLOW RIVER BASIN

02368000 YELLOW RIVER AT MILLIGAN, FL

LOCATION.--Lat 30 ° 45'10", long 86 ° 37'45" in SE 1 ⁄ 4 sec. 15, T.3 N., R.24 W., Okaloosa County, Hydrologic Unit 03140103, near center on downstream side of bridge on U.S. Highway 90, 0.5 mi east of Milligan, 0.5 mi upstream from Trammel Creek, 6.7 mi upstream from Shoal River, and 40 mi upstream from mouth.

DRAINAGE AREA.--624 mi 2

PERIOD OF RECORD.--July 1938 to September 1993, October 1996 to current year.

REVISED RECORDS.--WSP 892: 1938-39. WSP 1384: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 45.00 ft above National Geodetic Vertical Datum of 1929. Prior to Dec. 6, 1939, nonrecording gage at same site and datum.

REMARKS.--Records good, except for water year 1999, which are fair.

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of 1929 reached a stage of 26.2 ft, from information by local residents, discharge 137,000 ft 3 /s, from rating extended above 46,000 ft 3 /s.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 71700 787 891 914 1150 681 1050 577 984 2640 837 439 2 44600 777 854 929 1250 732 1060 502 934 2480 696 407 3 25600 911 829 1230 1370 772 1030 449 770 1800 612 e400 4 13200 893 811 1490 1400 696 924 413 630 1070 548 e390 5 7260 825 806 1700 1240 677 806 392 635 858 511 e410

6 4530 790 784 1730 1060 773 727 392 576 748 495 393 7 3090 762 789 1430 951 1000 682 1840 679 797 546 331 8 2500 739 845 1100 887 843 651 3200 560 834 562 326 9 2560 725 865 1130 848 1490 629 2310 540 864 526 317 10 2590 715 892 1430 827 1900 600 1660 565 773 e950 345

11 2430 1020 918 1700 808 1850 572 1420 496 764 e1000 343 12 2240 1660 892 1790 786 1690 541 836 558 1060 587 314 13 1950 1640 1040 1730 762 1380 510 676 620 1680 532 298 14 1710 1380 1170 1500 732 1620 489 747 721 2200 492 284 15 1560 1270 1250 e1450 705 1920 469 790 895 1950 457 273

16 1450 1340 1180 e1400 685 2150 448 687 1070 1690 459 260 17 1350 1590 1000 1300 673 2290 433 585 1200 1450 529 251 18 1280 1820 870 1240 674 2770 430 509 1350 1100 454 248 19 1220 1750 801 1160 677 2850 426 592 1520 1070 457 246 20 1170 1460 769 1070 684 1850 416 687 1520 1240 412 250

21 1130 1180 766 1000 698 1270 408 585 951 1330 392 258 22 1080 1090 954 957 675 1080 398 525 663 1430 401 259 23 1020 1170 1080 1170 654 978 393 482 616 1380 390 265 24 971 1390 1230 1460 658 912 385 461 595 1030 394 262 25 931 1510 1140 1670 645 868 388 496 625 1420 565 257

26 896 1550 1170 1860 645 852 403 475 817 1760 782 253 27 871 1440 1230 1870 641 834 438 808 1370 1840 816 258 28 855 1220 1260 1570 674 811 561 1270 1730 2100 626 269 29 840 1050 1250 1200 --- 763 597 1450 2110 2280 510 284 30 817 949 1150 1070 --- 725 629 1220 2410 2050 461 285 31 800 --- 1020 1040 --- 813 --- 1180 --- 1240 452 ---

MEAN 6587 1180 984 1364 838 1285 583 910 957 1449 563 306 MAX 71700 1820 1260 1870 1400 2850 1060 3200 2410 2640 1000 439 MIN 800 715 766 914 641 677 385 392 496 748 390 246 IN. 12.17 2.11 1.82 2.52 1.40 2.38 1.04 1.68 1.71 2.68 1.04 .55

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1938 - 1999, BY WATER YEAR (WY)

MEAN 723 742 1172 1461 1667 2058 1698 1068 905 861 939 847 MAX 6587 2737 6232 3375 3066 6380 5322 4173 3733 3191 5434 4305 (WY) 1999 1990 1954 1990 1979 1998 1975 1978 1970 1940 1975 1975 MIN 153 201 286 371 567 405 456 317 211 265 237 179 (WY) 1955 1955 1955 1955 1950 1955 1967 1967 1988 1968 1954 1972

SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1938 - 1999

ANNUAL MEAN 2323 1429 1174 HIGHEST ANNUAL MEAN 2206 1975 LOWEST ANNUAL MEAN 231 1994 HIGHEST DAILY MEAN 71700 Oct 1 71700 Oct 1 71700 Oct 1 1998 LOWEST DAILY MEAN 268 Jul 2 246 Sep 19 136 Jun 23 1967 ANNUAL SEVEN-DAY MINIMUM 283 Jun 27 253 Sep 16 146 Oct 22 1954 MAXIMUM PEAK FLOW 82600 Oct 1 82800 Sep 30 1998 MAXIMUM PEAK STAGE 24.09 Oct 1 24.09 Oct 1 1998 INSTANTANEOUS LOW FLOW 244 Sep 19 131 Jun 23 1967 ANNUAL RUNOFF (INCHES) 50.54 31.10 25.57 10 PERCENT EXCEEDS 3020 1830 2270 50 PERCENT EXCEEDS 1050 854 762 90 PERCENT EXCEEDS 350 401 318

e Estimated124 YELLOW RIVER BASIN

02368000 YELLOW RIVER AT MILLIGAN, FL--Continued

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 269 314 273 405 673 542 1090 327 156 240 244 169 2 266 496 265 396 671 555 931 309 152 213 310 301 3 288 441 262 389 632 499 772 297 149 199 403 264 4 311 502 262 383 573 443 667 285 145 192 330 216 5 337 518 261 382 525 414 611 274 141 178 328 215

6 312 436 267 378 492 398 574 267 140 165 321 214 7 297 372 279 379 466 429 574 261 138 154 357 333 8 299 344 272 387 442 404 545 254 138 145 309 381 9 298 316 273 373 425 374 500 248 135 162 269 316 10 332 302 287 362 414 355 457 231 132 177 253 285

11 428 296 297 523 405 345 428 222 128 154 238 269 12 442 288 290 880 398 349 407 215 125 180 249 251 13 480 279 290 1050 392 387 393 208 124 203 235 232 14 454 277 374 1050 411 394 388 211 123 186 208 240 15 398 275 411 872 566 396 400 207 168 168 188 270

16 356 267 380 627 881 360 435 211 243 147 174 230 17 327 262 408 527 1280 402 780 246 320 144 167 234 18 305 262 394 472 1400 519 932 243 292 138 155 201 19 287 262 379 441 953 602 715 223 400 149 149 183 20 277 265 735 426 697 617 547 206 378 143 154 173

21 266 285 734 436 598 698 459 197 367 161 170 183 22 262 288 1010 432 535 889 408 198 303 177 172 295 23 257 298 1200 411 492 1020 371 199 262 187 168 333 24 253 317 1150 453 455 873 344 190 236 173 149 259 25 250 315 1030 673 427 642 356 185 212 173 141 247

26 251 307 807 1000 408 518 396 180 232 189 137 233 27 248 303 615 1160 396 478 401 174 355 190 144 213 28 241 295 519 1100 420 633 451 168 364 169 167 206 29 237 284 467 817 489 973 406 214 321 148 178 198 30 237 280 434 677 --- 1270 358 185 289 139 155 186 31 240 --- 415 637 --- 1310 --- 164 --- 181 138 ---

MEAN 307 325 485 597 583 583 537 226 222 172 218 244 MAX 480 518 1200 1160 1400 1310 1090 327 400 240 403 381 MIN 237 262 261 362 392 345 344 164 123 138 137 169 IN. .57 .58 .90 1.10 1.01 1.08 .96 .42 .40 .32 .40 .44

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1938 - 2000, BY WATER YEAR (WY)

MEAN 716 735 1160 1446 1649 2033 1678 1053 894 850 927 837 MAX 6587 2737 6232 3375 3066 6380 5322 4173 3733 3191 5434 4305 (WY) 1999 1990 1954 1990 1979 1998 1975 1978 1970 1940 1975 1975 MIN 153 201 286 371 567 405 456 226 211 172 218 179 (WY) 1955 1955 1955 1955 1950 1955 1967 2000 1988 2000 2000 1972

SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1938 - 2000

ANNUAL MEAN 783 374 1161 HIGHEST ANNUAL MEAN 2206 1975 LOWEST ANNUAL MEAN 231 1994 HIGHEST DAILY MEAN 3200 May 8 1400 Feb 18 71700 Oct 1 1998 LOWEST DAILY MEAN 237 Oct 29 123 Jun 14 123 Jun 14 2000 ANNUAL SEVEN-DAY MINIMUM 243 Oct 25 129 Jun 8 129 Jun 8 2000 MAXIMUM PEAK FLOW 1460 Feb 18 82800 Sep 30 1998 MAXIMUM PEAK STAGE 5.25 Feb 18 23.92 Sep 30 1998 INSTANTANEOUS LOW FLOW 120 Jun 13 120 Jun 13 2000 ANNUAL RUNOFF (INCHES) 17.04 8.17 25.28 10 PERCENT EXCEEDS 1640 672 2250 50 PERCENT EXCEEDS 620 304 750 90 PERCENT EXCEEDS 271 165 312125 YELLOW RIVER BASIN

02368000 YELLOW RIVER AT MILLIGAN, FL--Continued

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 176 126 406 1460 1140 738 2020 459 453 568 859 968 2 167 126 377 1140 1140 758 1910 437 385 644 736 933 3 158 127 354 860 939 1030 1620 420 329 566 634 928 4 152 129 334 745 770 1350 1360 405 295 501 481 1140 5 148 129 322 685 676 1930 1420 390 270 447 390 1250

6 152 145 315 644 618 4280 1770 376 249 437 557 1280 7 183 167 309 612 578 8400 e2580 363 239 403 1130 1330 8 182 207 303 593 548 6870 e2390 360 236 360 1520 1510 9 158 332 300 566 527 4050 e1960 355 251 348 1760 1850 10 175 366 297 546 583 2290 1500 387 314 362 1900 1910

11 189 313 295 539 683 1630 1200 371 636 357 1880 1480 12 182 320 295 561 756 1670 1050 343 1430 368 1460 1020 13 167 321 290 556 740 2120 951 332 1900 404 1190 796 14 157 316 451 556 676 2480 893 339 2330 409 1070 666 15 153 288 693 542 617 4340 935 382 3020 362 1150 579

16 149 274 884 537 580 5330 1100 345 3200 328 1040 514 17 146 457 1230 560 559 4910 1080 318 2430 306 882 464 18 144 494 1200 651 551 3920 964 296 1470 283 783 434 19 140 641 1030 778 555 2890 850 281 869 264 1050 412 20 139 757 888 959 533 2340 743 437 674 250 1190 395

21 139 655 784 1100 506 2270 678 505 596 253 1500 384 22 138 564 744 1170 509 2860 639 397 682 451 1680 371 23 135 483 704 1040 494 4410 607 383 740 807 1510 360 24 132 452 678 840 481 4860 579 337 623 638 932 366 25 131 653 631 722 470 3680 569 312 651 463 679 381

26 132 660 574 650 462 2340 577 296 570 406 567 358 27 131 667 538 604 585 1790 597 284 487 399 493 344 28 130 616 909 574 808 1560 550 278 425 432 469 335 29 129 530 1170 550 --- 1610 514 302 389 482 826 322 30 128 456 1340 665 --- 1820 482 392 385 606 712 308 31 127 --- 1490 909 --- 1980 --- 423 --- 753 671 ---

MEAN 151 392 650 739 646 2984 1136 365 884 441 1023 780 MAX 189 757 1490 1460 1140 8400 2580 505 3200 807 1900 1910 MIN 127 126 290 537 462 738 482 278 236 250 390 308 IN. .28 .70 1.20 1.37 1.08 5.51 2.03 .67 1.58 .81 1.89 1.39

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1938 - 2001, BY WATER YEAR (WY)

MEAN 707 729 1152 1435 1632 2049 1669 1042 894 843 929 836 MAX 6587 2737 6232 3375 3066 6380 5322 4173 3733 3191 5434 4305 (WY) 1999 1990 1954 1990 1979 1998 1975 1978 1970 1940 1975 1975 MIN 151 201 286 371 567 405 456 226 211 172 218 179 (WY) 2001 1955 1955 1955 1950 1955 1967 2000 1988 2000 2000 1972

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1938 - 2001

ANNUAL MEAN 380 851 1156 HIGHEST ANNUAL MEAN 2206 1975 LOWEST ANNUAL MEAN 231 1994 HIGHEST DAILY MEAN 1490 Dec 31 8400 Mar 7 71700 Oct 1 1998 LOWEST DAILY MEAN 123 Jun 14 126 Nov 1 123 Jun 14 2000 ANNUAL SEVEN-DAY MINIMUM 127 Oct 29 127 Oct 29 127 Oct 29 2000 MAXIMUM PEAK FLOW 8810 Mar 7 82800 Sep 30 1998 MAXIMUM PEAK STAGE 10.27 Mar 7 23.92 Sep 30 1998 INSTANTANEOUS LOW FLOW 124 Oct 31 120 Jun 13 2000 ANNUAL RUNOFF (INCHES) 8.30 18.53 25.17 10 PERCENT EXCEEDS 707 1800 2250 50 PERCENT EXCEEDS 310 566 746 90 PERCENT EXCEEDS 144 183 310

e Estimated126 YELLOW RIVER BASIN

02368500 SHOAL RIVER NEAR MOSSY HEAD, FL

LOCATION.--Lat 30 ° 47'45", long 86 ° 18'25" in SW sec. 36, T.4 N., R.21 W., Walton County, Hydrologic Unit 03140103, near center span on dowstream side of bridge on County Road 1087, about 200 ft downstream from Machine Branch, 3.9 miles north of Mossy Head, and 34 miles upstream from mouth.

DRAINAGE AREA.--123 mi 2

.
PERIOD OF RECORD.--March 1951 to September 1978, May 2000 to current year.

GAGE.--Water-stage recorder. Datum of gage is 105.59 ft National Geodetic Vertical Datum of 1929. Prior to July 24, 1956, at site 300 ft north at same datum.

REMARKS.--Records good, except for estimated daily discharges, which are fair.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 58 39 84 177 133 90 256 81 68 160 123 324 2 56 39 82 163 132 102 228 79 73 166 114 411 3 54 39 80 154 124 102 207 76 57 133 100 326 4 52 39 78 148 121 431 231 73 54 116 87 282 5 50 38 77 144 110 285 321 70 54 112 81 277

6 58 41 76 141 104 151 269 69 54 109 592 289 7 83 43 75 138 102 117 220 66 54 116 639 285 8 64 44 73 137 101 104 199 65 54 126 521 250 9 55 154 74 131 100 108 186 64 73 106 409 202 10 52 202 72 125 130 147 175 66 72 102 258 185

11 52 111 74 126 129 121 163 63 284 110 237 161 12 52 82 72 155 111 336 154 59 707 109 279 157 13 50 69 69 141 105 1390 157 56 472 105 306 269 14 49 78 324 129 102 721 161 e54 447 94 262 233 15 48 71 309 124 101 1570 181 e53 355 87 278 156

16 47 71 350 126 102 1600 279 e52 235 82 198 138 17 46 183 591 127 100 698 193 e52 155 79 177 128 18 44 162 264 123 93 497 152 e52 127 78 179 123 19 43 270 212 147 90 466 138 56 116 77 e225 117 20 42 228 182 227 89 1560 129 60 113 79 e285 113

21 43 134 155 177 90 1290 123 58 115 92 e350 110 22 41 99 196 142 97 662 116 56 116 84 215 104 23 40 88 167 130 93 487 112 e54 149 75 164 101 24 40 99 146 122 88 389 109 e53 118 75 146 115 25 40 307 133 117 87 324 106 e52 103 82 138 131

26 40 207 125 112 89 285 100 e52 98 105 137 114 27 42 128 124 111 88 253 95 e54 95 95 127 104 28 42 103 524 110 84 237 91 56 106 148 123 98 29 42 94 671 110 --- 346 87 55 143 122 130 94 30 41 89 331 155 --- 402 83 54 123 108 157 90 31 40 --- 212 154 --- 303 --- 54 --- 141 139 ---

MEAN 48.6 112 194 139 103 502 167 60.1 160 106 231 183 MAX 83 307 671 227 133 1600 321 81 707 166 639 411 MIN 40 38 69 110 84 90 83 52 54 75 81 90 IN. .46 1.01 1.82 1.31 .88 4.71 1.52 .56 1.45 .99 2.17 1.66

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1951 - 2001, BY WATER YEAR (WY)

MEAN 188 166 247 280 311 312 306 206 199 188 215 217 MAX 963 556 890 652 649 739 837 630 582 499 831 708 (WY) 1976 1976 1954 1974 1974 1978 1964 1978 1959 1975 1975 1975 MIN 48.6 67.3 67.1 103 103 78.3 90.3 48.1 46.2 46.7 49.6 52.4 (WY) 2001 1956 1956 1955 2001 1955 1967 2000 2000 2000 2000 1972

SUMMARY STATISTICS FOR 2001 WATER YEAR WATER YEARS 1951 - 2001

ANNUAL MEAN 168 240 HIGHEST ANNUAL MEAN 399 1978 LOWEST ANNUAL MEAN 126 1955 HIGHEST DAILY MEAN 1600 Mar 16 8250 Jul 31 1975 LOWEST DAILY MEAN 38 Nov 5 29 Jun 26 2000 ANNUAL SEVEN-DAY MINIMUM 39 Oct 30 34 Jun 20 2000 MAXIMUM PEAK FLOW 2290 Mar 15 10500 Apr 27 1964 MAXIMUM PEAK STAGE 14.69 Mar 15 23.64 Apr 27 1964 INSTANTANEOUS LOW FLOW 35 Nov 5 27 Jun 26 2000 ANNUAL RUNOFF (INCHES) 18.53 26.50 10 PERCENT EXCEEDS 314 429 50 PERCENT EXCEEDS 114 162 90 PERCENT EXCEEDS 52 74

e Estimated127 YELLOW RIVER BASIN

02369000 SHOAL RIVER NEAR CRESTVIEW, FL

LOCATION.--Lat 30 ° 41'50", long 86 ° 34'15" in SW 1 ⁄ 4 sec. 5, T. 2 N., R. 23 W., Okaloosa County, Hydrologic Unit 03140103, near center of bridge on downstream side of southbound lane on State Highway 85, 3.5 mi downstream from Titi Creek, 4.2 mi south of Crestview, and 7 mi upstream from mouth.

DRAINAGE AREA.--474 mi 2

.
PERIOD OF RECORD.--July 1938 to current year.

REVISED RECORDS.--WSP 1274: 1939-40, 1944, 1947, 1950. WSP 1384: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 47.21 ft above National Geodetic Vertical Datum of 1929. Prior to Feb. 12, 1939, June 12, 1972 to Aug. 22, 1973, and July 8, 1994 to Oct. 6, 1995, nonrecording gage at same site and datum.

REMARKS.--No estimated daily discharges. Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 306 222 415 848 692 412 1330 480 503 574 814 834 2 292 223 405 742 601 432 1020 469 575 724 696 1530 3 282 222 397 686 564 462 930 459 464 715 524 2040 4 275 221 386 656 537 817 900 448 393 625 453 1650 5 269 220 378 637 518 1440 1060 435 354 574 413 1370

6 298 232 379 621 493 1500 1410 425 330 552 769 1400 7 426 245 382 606 477 768 1160 416 318 493 1980 1350 8 370 254 374 601 466 596 940 433 319 537 3250 1880 9 308 382 369 588 459 563 859 436 337 500 2420 2170 10 286 674 366 564 565 707 808 594 402 498 1480 1210

11 279 551 364 560 654 692 764 503 653 503 1150 929 12 272 384 362 667 598 745 740 441 2070 507 1170 828 13 267 331 351 666 530 2020 704 411 2790 529 1500 856 14 261 358 537 602 502 3620 693 390 2230 471 1520 910 15 256 339 968 563 488 5590 777 375 1870 455 1700 825

16 252 325 1030 563 480 5670 985 365 1360 396 1370 703 17 250 656 1060 582 474 6080 1120 356 872 366 1000 648 18 247 793 1430 566 455 4260 902 349 657 356 1040 618 19 243 853 975 603 435 2130 739 345 555 359 1210 600 20 241 936 820 927 427 2560 677 371 507 429 1440 588

21 241 778 710 944 438 4480 648 401 539 623 2030 573 22 240 562 730 774 497 5570 624 395 589 607 1640 551 23 236 478 741 650 480 3640 601 381 667 463 968 532 24 231 470 649 598 447 1960 584 358 651 408 794 573 25 228 774 584 565 432 1460 574 343 522 591 712 685

26 228 884 544 540 434 1210 553 332 463 577 662 656 27 226 691 522 528 430 1040 533 329 440 530 633 578 28 225 536 952 520 414 978 516 328 427 566 625 539 29 224 473 1990 510 --- 1090 502 359 450 646 768 516 30 223 441 2250 610 --- 1730 489 362 580 601 881 495 31 222 --- 1300 753 --- 1820 --- 345 --- 635 807 ---

MEAN 265 484 733 640 500 2130 805 401 763 529 1175 955 MAX 426 936 2250 944 692 6080 1410 594 2790 724 3250 2170 MIN 222 220 351 510 414 412 489 328 318 356 413 495 MED 252 456 544 603 480 1460 752 390 530 530 1000 764 IN. .64 1.14 1.78 1.56 1.10 5.18 1.89 .98 1.80 1.29 2.86 2.25

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1938 - 2001, BY WATER YEAR (WY)

MEAN 865 844 1016 1232 1371 1515 1298 979 995 1083 1116 1062 MAX 4097 2252 3601 2606 2974 3327 3056 2752 4421 5436 4385 4370 (WY) 1999 1996 1954 1978 1982 1948 1960 1978 1989 1994 1975 1998 MIN 265 331 345 417 500 365 396 254 309 265 261 301 (WY) 2001 1955 1956 1939 2001 1955 2000 2000 2000 2000 2000 1972

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1938 - 2001

ANNUAL MEAN 423 784 1114 HIGHEST ANNUAL MEAN 1781 1978 LOWEST ANNUAL MEAN 470 2000 HIGHEST DAILY MEAN 2250 Dec 30 6080 Mar 17 55500 Sep 30 1998 LOWEST DAILY MEAN 186 Jun 11 220 Nov 5 186 Jun 11 2000 ANNUAL SEVEN-DAY MINIMUM 190 Jun 8 222 Oct 30 190 Jun 8 2000 MAXIMUM PEAK FLOW 6210 Mar 17 59100 Sep 30 1998 MAXIMUM PEAK STAGE 8.43 Mar 17 21.40 Sep 30 1998 INSTANTANEOUS LOW FLOW 220 Nov 4 183 Jun 12 2000 ANNUAL RUNOFF (INCHES) 12.15 22.46 31.93 10 PERCENT EXCEEDS 676 1450 2020 50 PERCENT EXCEEDS 354 565 833 90 PERCENT EXCEEDS 222 307 424128 BLACKWATER RIVER BASIN

02370000 BLACKWATER RIVER NEAR BAKER, FL

LOCATION.--Lat 30 ° 50'00", long 86 ° 44'05", in SW 1 ⁄ 4 sec. 22, T. 4 N., R. 25 W., Okaloosa County, Blackwater River State Forest, Hydrologic Unit 03140104, near left bank on downstream side of bridge on State Highway 4, 0.3 mi downstream from Red Wash Branch, 3.8 mi northwest of Baker, and 35 mi upstream from mouth.

DRAINAGE AREA.--205 mi 2

PERIOD OF RECORD.--March 1950 to September 1992, October 1996 to current year.

REVISED RECORDS.--WSP 1704: 1950 (M), 1951-52.

GAGE.--Water-stage recorder. Datum of gage is 60.5 ft above National Geodetic Vertical Datum of 1929 (from design datum of bridge curb furnished by Florida Department of Transportation).

REMARKS.--No estimated daily discharges. Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 72 59 156 355 378 152 376 134 113 165 182 368 2 70 58 143 305 308 162 308 131 111 149 143 365 3 68 59 136 273 265 204 264 128 104 134 116 358 4 67 59 130 251 239 1470 262 125 100 124 101 310 5 66 59 125 236 220 1920 541 121 98 121 94 368

6 67 64 122 223 206 1090 601 118 98 124 141 321 7 71 73 121 210 196 633 464 116 99 119 190 252 8 71 92 116 202 189 469 351 114 99 114 184 257 9 69 195 113 196 182 392 289 113 100 110 174 233 10 68 238 110 188 216 379 252 124 108 104 166 190

11 67 168 109 185 290 350 227 139 306 107 143 165 12 66 122 107 199 260 632 207 123 1520 104 145 150 13 65 104 105 200 227 1810 193 113 1420 115 190 143 14 65 105 162 189 209 1370 195 108 662 111 171 135 15 64 109 289 182 199 1430 224 105 488 100 233 127

16 63 104 615 185 192 1320 348 103 373 94 190 121 17 63 179 716 215 189 874 290 101 281 89 155 116 18 62 225 493 228 184 631 221 99 223 87 158 112 19 62 361 408 237 174 514 193 99 184 85 319 109 20 61 414 385 505 166 914 178 148 164 84 721 108

21 61 291 327 571 165 1020 169 324 156 94 826 105 22 61 213 327 436 176 808 160 250 161 99 485 102 23 60 176 320 339 173 593 153 180 170 95 296 102 24 60 174 281 290 164 456 147 152 159 88 213 123 25 60 426 253 258 159 383 169 131 145 90 171 118

26 60 410 230 236 159 337 207 120 134 108 147 107 27 60 293 216 222 159 308 173 114 128 110 132 101 28 59 225 388 210 154 287 155 110 123 126 125 98 29 58 189 698 200 --- 380 144 110 127 160 186 96 30 58 170 601 313 --- 571 138 114 165 140 279 94 31 58 --- 446 464 --- 468 --- 110 --- 164 284 ---

MEAN 63.9 180 282 268 207 720 253 132 271 113 228 178 MAX 72 426 716 571 378 1920 601 324 1520 165 826 368 MIN 58 58 105 182 154 152 138 99 98 84 94 94 IN. .36 .98 1.59 1.51 1.05 4.05 1.38 .74 1.47 .64 1.28 .97

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1950 - 2001, BY WATER YEAR (WY)

MEAN 210 231 357 444 513 564 438 305 305 247 281 306 MAX 941 1142 2029 1200 1158 1661 1223 1438 1845 958 1772 1954 (WY) 1976 1990 1954 1978 1962 1990 1975 1978 1970 1975 1975 1998 MIN 63.9 67.8 74.2 96.8 154 86.1 100 91.4 78.0 71.7 75.6 65.9 (WY) 2001 1956 1956 1955 1951 1955 1968 1968 1968 2000 1954 1954

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1950 - 2001

ANNUAL MEAN 138 242 350 HIGHEST ANNUAL MEAN 738 1975 LOWEST ANNUAL MEAN 131 2000 HIGHEST DAILY MEAN 716 Dec 17 1920 Mar 5 23900 Sep 29 1998 LOWEST DAILY MEAN 58 Oct 29 58 Oct 29 58 Oct 29 2000 ANNUAL SEVEN-DAY MINIMUM 58 Oct 28 58 Oct 28 58 Oct 28 2000 MAXIMUM PEAK FLOW 1990 Mar 5 26500 Sep 29 1998 MAXIMUM PEAK STAGE 8.53 Mar 5 25.68 Sep 29 1998 INSTANTANEOUS LOW FLOW 57 Oct 29 57 Oct 29 2000 ANNUAL RUNOFF (INCHES) 9.19 16.02 23.18 10 PERCENT EXCEEDS 237 464 659 50 PERCENT EXCEEDS 114 165 200 90 PERCENT EXCEEDS 65 72 95129 BLACKWATER RIVER BASIN

02370500 BIG COLDWATER CREEK NEAR MILTON, FL

LOCATION.--Lat 30 ° 42'30", long 86 ° 58'20", in SW 1 ⁄ 4 sec.5, T.2 N., R.27 W., Santa Rosa County, Hydrologic Unit 03140104, near center channel on downstream side of bridge on State Highway 191, 3 mi upstream from mouth, and 6.5 mi northeast of Milton.

DRAINAGE AREA.--237 mi 2

PERIOD OF RECORD.--October 1938 to June 1979, October 1979 to September 1980 (gage heights and discharge measurements only), October 1980 to September 1991, October 1997 to August 1999, May 2000 to current year. Monthly discharge only for some periods, published in WSP 1304. Records published as "Coldwater Creek near Milton" prior to October 1956, and "Big Coldwater River near Milton" October 1956 to September 1957.

REVISED RECORDS.--WSP 892: 1939. WSP 1384: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 9.10 ft above National Geodetic Vertical Datum of 1929. Prior to Dec. 2, 1938, nonrecording gage at same site and datum.

REMARKS.--Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 218 198 336 428 481 262 415 260 334 455 338 359 2 216 199 320 375 397 262 375 257 275 381 281 380 3 215 200 306 346 355 279 350 253 246 339 249 397 4 213 199 292 326 333 1320 346 250 232 306 235 373 5 211 202 283 315 316 2220 442 245 222 298 228 349

6 211 208 275 306 302 970 441 242 215 317 230 404 7 219 213 270 297 293 588 386 240 214 301 252 359 8 213 223 267 291 287 472 354 238 212 270 292 398 9 207 288 262 286 282 426 335 247 224 256 280 350 10 206 473 259 277 325 426 322 268 259 247 254 358

11 206 321 255 276 395 400 312 256 618 261 249 329 12 205 263 250 290 351 608 303 249 2540 264 325 288 13 204 249 242 291 322 2010 298 239 3080 259 408 268 14 202 256 267 281 307 2170 321 233 1020 253 438 254 15 202 257 343 276 301 1470 401 230 841 240 441 243

16 201 248 326 295 297 1750 453 228 634 e229 384 235 17 201 355 321 346 290 959 424 225 461 e223 402 230 18 201 391 315 348 278 682 352 223 385 e220 370 225 19 201 582 315 380 269 605 320 223 345 232 510 224 20 203 660 336 801 266 741 302 226 318 223 1320 227

21 204 449 315 851 269 858 293 224 304 230 1640 223 22 204 352 334 567 299 672 287 222 320 265 692 218 23 202 316 345 443 296 547 278 226 462 236 454 216 24 200 432 315 388 280 477 279 225 452 225 367 234 25 200 1330 296 356 273 440 416 218 349 258 329 257

26 199 1610 282 333 274 418 411 216 309 262 302 243 27 199 756 277 322 270 391 320 215 287 265 282 228 28 200 491 453 317 265 373 292 217 273 260 270 223 29 199 409 913 311 --- 434 276 239 347 259 297 218 30 199 367 846 437 --- 550 266 248 476 269 348 215 31 201 --- 542 604 --- 477 --- 264 --- 352 327 ---

MEAN 205 417 347 379 310 782 346 237 542 273 413 284 MAX 219 1610 913 851 481 2220 453 268 3080 455 1640 404 MIN 199 198 242 276 265 262 266 215 212 220 228 215 IN. 1.00 1.96 1.69 1.85 1.36 3.81 1.63 1.15 2.55 1.33 2.01 1.34

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1939 - 2001, BY WATER YEAR (WY)

MEAN 412 450 521 606 641 754 620 485 570 529 542 556 MAX 1325 1278 1383 1422 1159 2240 1330 1209 2526 1404 2476 2435 (WY) 1976 1976 1954 1978 1962 1990 1961 1991 1989 1940 1975 1988 MIN 178 206 207 273 308 253 261 223 216 227 208 195 (WY) 1969 1956 1956 1956 1957 1955 1968 1956 1968 2000 1956 1968

SUMMARY STATISTICS FOR 2001 WATER YEAR WATER YEARS 1939 - 2001

ANNUAL MEAN 378 555 HIGHEST ANNUAL MEAN 861 1976 LOWEST ANNUAL MEAN 307 1968 HIGHEST DAILY MEAN 3080 Jun 13 29700 Mar 17 1990 LOWEST DAILY MEAN 198 Nov 1 158 Jun 10 1956 ANNUAL SEVEN-DAY MINIMUM 199 Oct 26 171 Oct 28 1968 MAXIMUM PEAK FLOW 4410 Jun 13 36900 Mar 17 1990 MAXIMUM PEAK STAGE 9.32 Jun 13 22.98 Mar 17 1990 INSTANTANEOUS LOW FLOW 196 Oct 29 156 Jun 10 1956 ANNUAL RUNOFF (INCHES) 21.67 31.83 10 PERCENT EXCEEDS 548 890 50 PERCENT EXCEEDS 292 412 90 PERCENT EXCEEDS 215 260

e Estimated130 BLACKWATER RIVER BASIN

02370700 POND CREEK NEAR MILTON, FL

LOCATION.--Lat 30 ° 40'50", long 87 ° 07'55", in SE 1 ⁄ 4 sec. 15, T.2 N., R.29 W., Santa Rosa County, Hydrologic Unit 03140104, near center of span on upstream side of bridge on State Highway 191, 0.6 mi downstream from Reader Creek, 6.4 mi northwest of Milton, and 10 mi upstream from mouth.

DRAINAGE AREA.--58.7 mi 2

. PERIOD OF RECORD.--January 1958 to July 1978; August 1978 to October 1983, 1992, 1993, 1997, 1998 (discharge measurements only) ; November 1999 to current year.

GAGE.--Water-stage recorder. Datum of gage is 47.45 ft above National Geodetic Vertical Datum of 1929.

REMARKS.--No estimated daily discharges. Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 31 28 38 40 40 36 42 35 39 45 59 43 2 30 28 38 39 39 36 41 34 35 37 38 39 3 30 28 37 38 38 40 40 34 33 35 34 42 4 30 28 37 38 37 95 40 34 32 34 33 50 5 29 29 37 38 37 52 41 34 32 35 32 43

6 35 29 37 37 36 41 40 34 32 35 32 42 7 36 30 37 37 36 38 39 33 32 33 36 56 8 31 30 37 38 36 37 38 33 32 33 40 53 9 30 44 37 37 36 39 38 35 34 32 40 45 10 30 48 36 36 51 41 38 46 33 33 39 37

11 30 33 36 38 45 38 37 37 128 44 46 35 12 29 31 36 41 39 77 37 34 269 47 50 34 13 29 31 35 39 38 149 37 33 83 49 49 33 14 29 35 39 38 38 61 37 33 62 36 53 33 15 29 32 40 37 38 150 39 33 46 33 45 32

16 29 33 39 41 37 102 51 33 39 32 38 32 17 29 64 40 41 37 54 41 32 36 32 41 32 18 29 51 38 38 35 52 37 32 34 38 36 32 19 29 75 40 52 35 50 37 32 33 38 46 32 20 29 52 40 85 35 73 36 32 33 33 114 34

21 29 38 38 48 38 60 36 32 34 35 48 32 22 29 35 42 42 46 48 35 32 35 35 37 31 23 29 34 39 40 40 44 35 32 40 32 34 31 24 29 103 37 39 37 43 37 32 35 36 34 32 25 28 258 36 38 37 42 46 32 33 43 33 32

26 28 118 36 37 38 41 38 32 33 43 32 31 27 28 49 37 37 37 40 36 32 32 37 32 31 28 28 43 110 37 36 40 36 32 33 35 38 31 29 28 41 86 37 --- 57 35 32 36 37 42 31 30 28 39 47 56 --- 60 34 33 54 51 37 30 31 28 --- 42 47 --- 46 --- 35 --- 73 36 ---

TOTAL 915 1517 1304 1286 1072 1782 1154 1039 1462 1191 1304 1091 MEAN 29.5 50.6 42.1 41.5 38.3 57.5 38.5 33.5 48.7 38.4 42.1 36.4 MAX 36 258 110 85 51 150 51 46 269 73 114 56 MIN 28 28 35 36 35 36 34 32 32 32 32 30 AC-FT 1810 3010 2590 2550 2130 3530 2290 2060 2900 2360 2590 2160 CFSM .50 .86 .72 .71 .65 .98 .66 .57 .83 .65 .72 .62 IN. .58 .96 .83 .81 .68 1.13 .73 .66 .93 .75 .83 .69

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1958 - 2001, BY WATER YEAR (WY)

MEAN 69.2 66.1 72.3 80.0 80.9 84.7 82.5 68.5 84.6 70.6 79.9 77.8 MAX 151 158 130 189 143 145 166 149 275 127 224 212 (WY) 1976 1976 1962 1978 1961 1977 1960 1978 1970 1978 1975 1960 MIN 27.6 30.8 41.2 39.0 38.3 48.9 38.5 32.1 35.9 32.7 31.9 28.6 (WY) 1969 1969 1969 1969 2001 1968 2001 2000 1968 2000 1968 1968

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1958 - 2001

ANNUAL TOTAL 14735 15117 ANNUAL MEAN 40.3 41.4 78.2 HIGHEST ANNUAL MEAN 125 1978 LOWEST ANNUAL MEAN 41.4 2001 HIGHEST DAILY MEAN 258 Nov 25 269 Jun 12 2460 Sep 16 1960 LOWEST DAILY MEAN 27 Jul 20 28 Oct 25 26 Sep 10 1968 ANNUAL SEVEN-DAY MINIMUM 28 Jul 18 28 Oct 25 26 Sep 9 1968 MAXIMUM PEAK FLOW 329 Jun 12 4580 Jun 3 1970 MAXIMUM PEAK STAGE 6.58 Jun 12 12.97 Jun 3 1970 INSTANTANEOUS LOW FLOW 28 Oct 25 26 Sep 9 1968 ANNUAL RUNOFF (AC-FT) 29230 29980 56630 ANNUAL RUNOFF (CFSM) .69 .71 1.33 ANNUAL RUNOFF (INCHES) 9.34 9.58 18.09 10 PERCENT EXCEEDS 50 51 116 50 PERCENT EXCEEDS 36 37 65 90 PERCENT EXCEEDS 29 31 39131 ESCAMBIA RIVER BASIN

02375500 ESCAMBIA RIVER NEAR CENTURY, FL

LOCATION.--Lat 30 ° 57'54", long 87 ° 14'03", in NW 1 ⁄ 4 sec. 10, T. 5 N., R. 30 W., Santa Rosa County, Hydrologic Unit 03140305, on left bank 16 ft downstream from bridge on State Highway 4, 1.2 mi downstream from Escambia Creek, 1.7 mi east of Century, an d 52 mi upstream from mouth.

DRAINAGE AREA.--3,817 mi 2

.
PERIOD OF RECORD.--October 1934 to current year.

REVISED RECORDS.-- WSP 1384: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 28.34 ft above National Geodetic Vertical Datum of 1929 (Florida Department of Transportation bench mark). Prior to Jan. 13, 1940, nonrecording gage at same site and datum.

REMARKS.--Records good. Some gage-height fluctuation during periods of low flow are attributed to regulation by power plants at Point-A Dam, 85.4 mi and Gnatt Dam, 90.1 mi upstream from the gaging station.

EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum stage since 1850, 37.8 ft, March 1929, present datum, discharge not determined, fro m information by U.S. Army Corps of Engineers, Mobile District.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 659 455 2080 7590 8540 5560 12000 3420 4690 4070 2830 2690 2 698 456 1920 6770 8240 7530 10900 3160 3940 4670 2470 3210 3 593 455 1790 6550 7100 13200 9850 3000 3070 4610 2380 3820 4 543 458 1660 6580 6290 39800 9400 2840 2710 e4550 2050 4840 5 522 463 1600 6050 5560 53800 12000 2580 2130 4770 1810 6640

6 519 476 1550 5240 5150 50200 16500 2610 1800 5460 1790 6050 7 650 563 1480 4060 4500 45400 19600 2430 1710 5900 2900 5060 8 729 721 1460 3480 3970 49500 20300 2380 1710 4880 4720 7260 9 712 1240 1330 3120 3530 56300 20600 2290 1860 3710 5640 7760 10 667 1790 1330 2800 3770 60100 21500 2180 2430 3210 6640 7560

11 662 1790 1340 2710 4820 54800 21800 2350 5880 2720 7450 6550 12 595 1450 1330 2750 5470 46800 18500 2290 11100 2890 8010 4980 13 597 1210 1390 2610 5020 40600 12500 2180 15200 2660 8620 3880 14 565 1350 1580 2560 4580 35400 10200 2090 18300 2480 8150 3170 15 527 1320 2280 2450 4250 36000 9340 1980 20100 2310 7210 2950

16 512 1220 3070 2720 4070 37300 7940 1900 21400 2020 6100 2500 17 507 1500 3260 3940 3700 36900 7050 1840 21400 1960 4890 2280 18 580 1830 3410 4920 3440 35800 6330 1710 18100 1860 4810 2120 19 700 2730 3300 5220 3240 33300 5540 1770 13300 1800 6290 2090 20 562 2790 3150 8010 2950 32300 5290 1670 8630 1660 8280 2250

21 507 2430 3060 10000 2960 31800 4770 1760 6350 1880 8440 2410 22 493 2110 2760 10100 2980 31700 4510 1920 6550 2490 6520 2270 23 484 1720 2780 8980 2900 31400 4310 1810 6120 3030 4500 2070 24 473 1910 2800 7400 2750 30500 4110 1790 6230 2210 3700 2000 25 469 4450 2560 6530 2770 28900 3980 1850 5100 1850 3050 1970

26 468 4310 2300 5850 3300 28100 4520 1660 4710 1830 2800 1910 27 465 3620 2380 5250 4760 28200 4100 1570 4080 1960 2450 1830 28 461 2970 2640 4550 5590 26700 4150 1640 3760 2120 2420 1730 29 460 2510 5370 3960 --- 22600 4220 2100 3700 2130 2970 1650 30 460 2210 7140 5340 --- 16500 3970 2130 3530 2120 2880 1590 31 457 --- 7730 7680 --- 13400 --- 3070 --- 2440 2580 ---

MEAN 558 1750 2640 5347 4507 34210 9993 2193 7653 2976 4689 3570 MAX 729 4450 7730 10100 8540 60100 21800 3420 21400 5900 8620 7760 MIN 457 455 1330 2450 2750 5560 3970 1570 1710 1660 1790 1590 IN. .17 .51 .80 1.62 1.23 10.33 2.92 .66 2.24 .90 1.42 1.04

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1935 - 2001, BY WATER YEAR (WY)

MEAN 2976 3201 5556 8462 10130 12910 11000 5791 4412 4010 3981 3127 MAX 24310 14740 24600 31530 21160 34210 31430 19520 22500 20850 23560 12010 (WY) 1999 1949 1954 1936 1965 2001 1980 1978 1970 1994 1975 1975 MIN 558 1033 1157 1895 2596 1783 2068 890 828 687 775 693 (WY) 2001 1955 1955 1956 1989 1955 2000 2000 2000 2000 2000 1968

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1935 - 2001

ANNUAL MEAN 1694 6701 6277 HIGHEST ANNUAL MEAN 11690 1975 LOWEST ANNUAL MEAN 1820 2000 HIGHEST DAILY MEAN 7730 Dec 31 60100 Mar 10 106000 Sep 30 1998 LOWEST DAILY MEAN 455 Nov 1 455 Nov 1 455 Nov 1 2000 ANNUAL SEVEN-DAY MINIMUM 457 Oct 29 457 Oct 29 457 Oct 29 2000 MAXIMUM PEAK FLOW 60800 Mar 10 117000 Sep 30 1998 MAXIMUM PEAK STAGE 20.46 Mar 10 24.35 Mar 18 1990 INSTANTANEOUS LOW FLOW 452 Oct 31 452 Oct 31 2000 ANNUAL RUNOFF (INCHES) 6.04 23.84 22.34 10 PERCENT EXCEEDS 3410 18200 14300 50 PERCENT EXCEEDS 1180 3070 3670 90 PERCENT EXCEEDS 561 707 1340

e Estimated132 ESCAMBIA RIVER BASIN

02376033 ESCAMBIA RIVER NEAR MOLINO, FL

LOCATION.--Lat 30 ° 40'12", long 87 ° 16'00", in SE 1 ⁄ 4 sec. 20, T. 2 N., R. 20 W., Escambia County, Hydrologic Unit 03140305, near right bank on downstream side of bridge on State Highway 184, 4.1 mi northeast of Cottage Hill, and 5.5 mi southeast of Molino.

DRAINAGE AREA.--4,147 mi 2

. PERIOD OF RECORD.--April 1960 to September 1981 (gage heights and discharge measurements only). October 1983 to September 1987 (Daily discharges not computed for days with instantaneous gage heights below 1.5 ft), October 1987 to September 1994, October 1996 to current year.

GAGE.--Water-stage and water-current meter recorders. Elevation of gage is National Geodetic Vertical Datum of 1929. Since May 17, 2000, water-current meter.

REMARKS.--No estimated daily discharges. Records fair. Flow generally affected by tide when discharge is less than 5,000 ft 3 /s.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 932 627 3110 6310 5680 5100 18800 4380 2580 4500 2700 3670 2 938 663 2780 8550 7950 5530 16600 4070 3440 4280 3010 3610 3 989 681 2460 10400 9900 6410 15100 3670 4050 4490 2950 3990 4 879 649 2270 10700 10600 9790 14000 3370 3780 4850 2720 4280 5 817 672 2040 9220 10100 18600 12900 3070 3070 5060 2480 4760

6 824 581 1910 8640 9070 40600 12300 2730 2470 5220 2160 5520 7 864 863 1870 7880 6790 49100 13200 2620 1880 5260 2200 6530 8 905 863 1810 5440 5560 45300 15800 2510 1680 5480 2870 7200 9 955 1580 1690 4710 5300 41600 18400 2340 1670 5580 4090 6360 10 951 2140 1620 4220 4970 46100 19500 2310 1830 5270 5010 7800

11 933 2340 1540 3620 4780 53700 20000 2180 2870 4950 5670 10200 12 938 2380 1570 3340 4880 54800 20600 2180 5050 4550 6840 11100 13 838 2110 1470 3310 5460 49700 20700 2270 7650 3910 9710 10100 14 838 1970 1810 3180 5620 41200 19600 2050 11300 3490 11500 6840 15 780 1960 2100 3020 5470 35200 17300 1930 15400 3050 12000 4880

16 743 1980 2600 3100 5320 31200 15000 1800 18900 2770 11700 4090 17 751 2310 3390 3110 4930 30500 12900 1730 20900 2360 10800 3310 18 724 2550 3590 3650 4850 30500 10900 1660 21900 2240 9430 2780 19 806 3110 3970 4600 4500 30100 9130 1530 22100 2140 7090 2560 20 914 3680 4010 5330 4170 29400 6840 1620 21200 2060 6770 2450

21 845 3880 3840 5970 3960 28000 5530 1550 18800 1950 7360 2480 22 723 3570 3850 9330 3900 26900 5060 1590 15100 2230 9340 2670 23 717 3110 3740 11100 3940 26200 4910 1670 11500 2540 10300 2590 24 667 2890 3540 12600 3780 25900 4650 1680 9640 3030 9840 2460 25 623 4140 3470 12500 3720 25600 4730 1620 7420 3090 6050 2410

26 636 4970 3200 11200 3600 25000 4910 1660 6150 2780 4570 2240 27 659 5270 2970 9780 3760 24200 4640 1480 5580 2430 3740 2100 28 656 5180 3570 8070 4350 23700 4530 1390 5160 2490 3300 2010 29 670 4540 4000 5990 --- 24000 4380 1490 4790 2640 3380 1970 30 663 3740 4590 5100 --- 23300 4400 1840 4590 2680 3480 1840 31 701 --- 5450 5040 --- 21300 --- 2120 --- 2670 3600 ---

MEAN 803 2500 2898 6742 5604 29950 11910 2197 8748 3550 6021 4493 MAX 989 5270 5450 12600 10600 54800 20700 4380 22100 5580 12000 11100 MIN 623 581 1470 3020 3600 5100 4380 1390 1670 1950 2160 1840 IN. .22 .67 .81 1.87 1.41 8.33 3.21 .61 2.35 .99 1.67 1.21

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1988 - 2001, BY WATER YEAR (WY)

MEAN 4836 4267 5927 9946 10460 16130 8264 5114 5739 6504 3633 3641 MAX 32570 8956 18920 24210 19080 37410 13870 14530 19160 22110 9523 9067 (WY) 1999 1993 1993 1998 1992 1990 1989 1991 1989 1994 1994 1988 MIN 803 1961 2212 3126 2650 4462 2785 1444 1357 1168 1266 1335 (WY) 2001 1991 1991 1989 1989 2000 2000 2000 2000 2000 2000 2000

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1988 - 2001

ANNUAL MEAN 2259 7133 7019 HIGHEST ANNUAL MEAN 10680 1990 LOWEST ANNUAL MEAN 2433 2000 HIGHEST DAILY MEAN 6950 Mar 30 54800 Mar 12 111000 Mar 22 1990 LOWEST DAILY MEAN 581 Nov 6 581 Nov 6 581 Nov 6 2000 ANNUAL SEVEN-DAY MINIMUM 653 Oct 24 653 Oct 24 653 Oct 24 2000 MAXIMUM PEAK FLOW 55800 Mar 12 113000 Mar 23 1990 MAXIMUM PEAK STAGE 11.63 Mar 12 15.72 Mar 23 1990 INSTANTANEOUS LOW FLOW 581 Nov 6 581 Nov 6 2000 ANNUAL RUNOFF (INCHES) 7.42 23.35 23.00 10 PERCENT EXCEEDS 4120 18800 16200 50 PERCENT EXCEEDS 1810 3940 3980 90 PERCENT EXCEEDS 938 946 1870133 BAYOU MARCUS CREEK BASIN

02376100 BAYOU MARCUS CREEK NEAR PENSACOLA, FL

LOCATION.--Lat 30 ° 26'53", long 87 ° 17'26", in SE 1 ⁄ 4 sec.13, T.2 S., R.30 W., Escambia County, Hydrologic Unit 03140107, near mid channel on downstream side of eastbound bridge on U.S. Highway 90, 0.3 mi upstream from Turner's Creek, 4.5 mi upstream, and 5.3 mi northwest of City Hall in Pensacola.

DRAINAGE AREA.--10.8 mi 2

.
PERIOD OF RECORD.--February 1958 to March 1960, October 1987 to September 1991, October 1998 to current year.

REVISED RECORDS.--WDR FL-88-4: Drainage area.

GAGE.--Water-stage recorder. Datum of gage is 11.21 ft above National Geodetic Vertical Datum of 1929. Feb. 12, 1958 to Mar. 17

, 1960, water-stage recorder 100 ft upstream at present datum.

REMARKS.--Records good.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 e9.7 7.7 12 12 11 11 14 8.7 15 12 55 18 2 e9.6 7.7 12 11 11 11 12 8.4 10 14 27 16 3 e9.5 7.8 12 11 10 13 12 8.0 7.9 12 17 23 4 e9.4 7.7 11 11 9.9 17 12 7.7 6.5 9.9 13 26 5 e10 9.0 12 11 9.8 13 12 7.4 6.1 12 12 17

6 11 13 12 11 9.9 11 11 6.9 5.7 12 12 14 7 13 11 11 11 10 9.8 11 6.4 5.9 10 14 12 8 11 12 12 12 12 9.4 11 6.6 6.6 9.3 30 15 9 e10 37 12 11 12 19 11 7.1 9.2 10 22 15 10 9.8 20 11 10 16 22 10 6.9 12 18 15 15

11 e9.6 13 11 12 12 15 10 6.7 63 13 17 15 12 9.4 11 12 14 11 43 9.7 6.5 42 26 18 19 13 9.0 13 10 12 11 42 9.3 6.4 20 47 15 15 14 9.1 15 18 11 10 23 9.0 5.9 16 19 42 12 15 8.9 11 15 11 10 150 9.2 5.8 13 12 26 11

16 8.7 18 14 14 10 33 10 5.7 11 11 17 9.8 17 8.7 26 12 13 11 20 9.4 5.5 9.5 9.2 16 9.5 18 8.6 20 11 12 8.6 22 8.5 5.3 8.4 8.3 19 9.4 19 8.7 23 16 33 8.6 19 8.3 5.7 8.3 7.7 41 9.9 20 8.7 17 12 28 9.3 21 8.7 6.3 7.7 7.6 34 11

21 8.5 13 13 16 24 17 8.8 5.7 9.2 13 20 10 22 9.2 12 13 13 30 16 8.9 6.0 14 15 15 9.3 23 8.9 12 12 12 16 14 8.8 5.3 15 10 13 8.4 24 8.4 68 11 11 13 14 11 5.2 11 7.9 12 9.8 25 7.8 56 11 11 13 14 14 5.2 8.8 36 11 10

26 7.6 22 10 10 14 13 10 4.9 8.4 24 11 8.8 27 7.7 17 13 11 12 12 8.3 4.9 7.8 18 11 8.9 28 7.7 15 35 11 11 13 8.3 5.4 8.3 22 11 8.6 29 7.7 15 20 11 --- 23 8.5 6.7 8.9 14 11 8.5 30 7.7 13 14 18 --- 21 8.4 6.7 10 11 11 8.2 31 7.8 --- 12 13 --- 16 --- 8.8 --- 109 15 ---

MEAN 9.08 18.1 13.3 13.2 12.4 22.5 10.1 6.41 12.8 18.1 19.5 12.8 MAX 13 68 35 33 30 150 14 8.8 63 109 55 26 MIN 7.6 7.7 10 10 8.6 9.4 8.3 4.9 5.7 7.6 11 8.2 IN. .97 1.87 1.42 1.41 1.19 2.40 1.04 .68 1.33 1.93 2.08 1.32

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1958 - 2001, BY WATER YEAR (WY)

MEAN 31.2 29.3 27.1 29.6 28.3 33.0 27.2 26.4 28.2 30.8 29.0 31.0 MAX 49.9 48.6 39.5 40.8 51.5 46.3 49.2 43.6 46.9 55.4 50.1 61.8 (WY) 1959 1959 1959 1959 1988 1958 1959 1991 1989 1958 1988 1988 MIN 9.08 14.9 13.3 13.2 12.4 13.4 10.1 6.41 11.5 7.95 9.78 12.8 (WY) 2001 1991 2001 2001 2001 2000 2001 2001 2000 2000 2000 2001

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1958 - 2001

ANNUAL MEAN 13.6 14.0 27.6 HIGHEST ANNUAL MEAN 41.8 1959 LOWEST ANNUAL MEAN 14.0 2001 HIGHEST DAILY MEAN 310 Sep 8 150 Mar 15 310 Sep 8 2000 LOWEST DAILY MEAN 4.7 Jul 19 4.9 May 26 4.7 Jul 19 2000 ANNUAL SEVEN-DAY MINIMUM 5.0 Jun 8 5.3 May 22 5.0 Jun 8 2000 MAXIMUM PEAK FLOW 260 Mar 15 701 Mar 16 1990 MAXIMUM PEAK STAGE 4.36 Mar 15 5.51 Mar 16 1990 INSTANTANEOUS LOW FLOW 4.4 May 26 4.1 Jul 19 2000 ANNUAL RUNOFF (INCHES) 17.10 17.64 34.66 10 PERCENT EXCEEDS 20 22 47 50 PERCENT EXCEEDS 11 11 26 90 PERCENT EXCEEDS 6.4 7.7 11

e Estimated134 ELEVENMILE CREEK BASIN

02376115 ELEVENMILE CREEK NEAR PENSACOLA, FL

LOCATION.--Lat 30 ° 29'53", long 87 ° 20'09", in SE 1 ⁄ 4 sec. 22, T. 1 S., R. 31 W., Escambia County, Hydrologic Unit 03140107, near left bank on downstream side of bridge on U.S. Highway 90, 1.8 mi upstream from Eightmile Creek, 4.0 mi upstream from mouth, and 5.6 mi northwest of Pensacola High School in West Pensacola.

DRAINAGE AREA.--27.8 mi 2

.
PERIOD OF RECORD.--October 1987 to current year.

GAGE.--Water-stage recorder. Datum of gage is 10.00 ft above National Geodetic Vertical Datum of 1929.

REMARKS.--No estimated daily discharges. Records good. Discharges are increased by about 30 ft 3 /s from a paper mill located about 10 mi upstream.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 52 51 61 65 65 70 68 49 78 66 329 66 2 50 52 60 61 60 70 63 52 60 68 118 65 3 52 51 59 61 60 98 62 51 51 65 87 76 4 54 54 59 59 57 219 60 50 49 75 78 93 5 53 55 58 60 56 93 60 50 49 92 68 72

6 74 59 57 56 57 71 63 51 45 73 64 69 7 79 58 56 58 56 70 63 49 49 62 116 66 8 59 62 57 59 55 68 62 45 64 58 110 64 9 56 150 57 57 56 80 58 48 62 58 89 66 10 47 85 56 56 72 84 61 51 54 91 73 70

11 46 62 60 62 63 73 59 47 609 73 169 69 12 45 60 55 68 63 226 59 48 351 146 192 78 13 46 64 55 62 62 344 59 46 538 228 132 68 14 50 72 66 60 63 119 57 46 447 83 219 62 15 49 61 61 59 70 930 57 47 135 69 373 60

16 50 72 62 69 67 249 55 47 95 61 127 59 17 53 122 56 70 59 137 53 46 79 59 104 59 18 51 103 53 69 55 133 54 46 68 64 154 59 19 51 134 66 109 53 107 52 48 67 66 307 60 20 53 94 59 159 54 130 54 50 64 57 222 60

21 52 80 59 84 395 101 55 47 69 63 110 57 22 54 73 64 69 396 89 54 47 75 72 83 57 23 53 64 58 67 129 76 52 47 79 58 77 56 24 52 190 59 63 95 74 55 48 63 73 73 56 25 49 341 56 59 90 72 58 46 60 382 69 56

26 49 103 53 59 84 68 49 46 61 268 64 54 27 49 80 58 59 77 65 49 47 58 129 63 53 28 52 73 244 60 75 65 52 48 59 102 65 52 29 50 66 139 58 --- 113 52 47 60 88 65 54 30 51 63 85 83 --- 97 49 50 70 78 64 53 31 51 --- 71 73 --- 75 --- 64 --- 481 68 ---

MEAN 52.6 88.5 68.4 68.2 90.9 138 56.8 48.5 122 110 127 63.0 MAX 79 341 244 159 396 930 68 64 609 481 373 93 MIN 45 51 53 56 53 65 49 45 45 57 63 52

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1988 - 2001, BY WATER YEAR (WY)

MEAN 86.6 99.9 89.4 115 105 143 93.5 78.7 105 112 95.5 114 MAX 223 311 199 239 153 332 246 168 323 252 183 457 (WY) 1996 1996 1996 1998 1997 1998 1996 1991 1989 1994 1995 1998 MIN 52.5 47.4 53.6 67.5 56.4 71.5 56.8 48.5 57.6 50.4 58.8 53.1 (WY) 1991 1991 1991 1989 2000 2000 2001 2001 1988 2000 1990 1990

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1988 - 2001

ANNUAL MEAN 66.7 86.1 103 HIGHEST ANNUAL MEAN 160 1998 LOWEST ANNUAL MEAN 66.4 2000 HIGHEST DAILY MEAN 609 Sep 8 930 Mar 15 8000 Sep 28 1998 LOWEST DAILY MEAN 44 Jul 26 45 Oct 12 33 Aug 24 1989 ANNUAL SEVEN-DAY MINIMUM 46 Jul 23 47 May 12 42 Nov 2 1990 MAXIMUM PEAK FLOW 1510 Mar 15 12800 Sep 28 1998 MAXIMUM PEAK STAGE 9.71 Mar 15 16.94 Sep 28 1998 INSTANTANEOUS LOW FLOW 41 May 14 29 Aug 25 1989 10 PERCENT EXCEEDS 84 129 142 50 PERCENT EXCEEDS 56 62 72 90 PERCENT EXCEEDS 49 49 56135 PERDIDO RIVER BASIN

02376293 BRUSHY CREEK NEAR BRATT, FL

LOCATION.--Lat 30 ° 58'42", long 87 ° 31'41", in SE 1 ⁄ 4 sec. 3, T. 5 N., R. 5 E., Escambia County, Hydrologic Unit 03140106, at bridge on Nokomis Road, 0.8 mi downstream from Rocky Creek, 1.4 mi below Alabama-Florida State Line, 2.1 mi upstream from Reedy Creek, and 6.0 mi west of Bratt.

DRAINAGE AREA.--26.5 mi 2

.
PERIOD OF RECORD.--October 1998 to current year.

GAGE.--Water-stage recorder. Elevation of gage is National Geodetic Vertical Datum of 1929, from topographic map.

REMARKS.--Records good.

EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge measured, 3,070 ft 3 /s, Sept. 29, 1998, gage height, 184.11 ft.

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 12 12 17 19 24 18 28 16 15 23 26 27 2 12 12 17 18 21 18 26 16 13 20 21 26 3 12 12 16 18 20 e490 26 16 11 26 19 32 4 12 12 16 18 18 e210 62 16 10 43 17 57 5 12 12 16 18 18 e108 132 15 11 48 18 30

6 12 13 16 17 18 e48 44 14 11 83 22 24 7 12 20 16 16 18 e45 33 14 18 32 21 23 8 12 17 16 17 18 e41 28 15 26 23 104 28 9 12 28 16 17 18 e49 26 19 26 20 103 36 10 12 18 16 17 30 e54 25 25 17 20 36 36

11 12 14 16 17 23 e48 24 17 231 24 61 33 12 12 13 16 18 20 e88 23 15 177 25 131 27 13 12 14 16 17 19 e320 26 14 46 45 92 22 14 12 18 44 16 19 89 51 13 31 26 58 20 15 12 15 27 18 19 507 42 13 27 20 79 19

16 12 18 22 28 18 181 42 13 23 18 42 18 17 12 28 22 31 18 71 31 12 20 18 38 18 18 12 37 20 24 17 51 25 12 19 18 30 20 19 12 50 24 40 17 44 23 12 20 18 28 20 20 12 23 21 74 17 52 21 11 21 17 32 20

21 12 19 20 26 23 50 20 11 20 23 26 19 22 12 18 23 23 24 41 18 12 48 25 24 18 23 12 17 19 21 20 36 18 12 29 18 22 17 24 12 48 18 20 19 32 19 12 21 17 21 21 25 12 79 18 19 18 34 20 12 18 19 20 20

26 12 23 17 18 18 31 19 11 18 52 19 19 27 12 20 18 18 18 30 18 11 18 56 19 18 28 12 19 66 18 18 38 17 11 21 41 25 18 29 11 18 51 19 --- 49 16 13 70 32 23 17 30 12 18 24 65 --- 37 16 12 29 24 22 16 31 12 --- 21 29 --- 32 --- 14 --- 24 23 ---

MEAN 12.0 22.2 22.1 23.7 19.6 94.9 30.6 13.8 35.5 29.0 39.4 24.0 MAX 12 79 66 74 30 507 132 25 231 83 131 57 MIN 11 12 16 16 17 18 16 11 10 17 17 16 IN. .52 .93 .96 1.03 .77 4.13 1.29 .60 1.50 1.26 1.72 1.01

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1999 - 2001, BY WATER YEAR (WY)

MEAN 38.3 35.7 31.3 36.3 27.0 68.9 28.0 19.4 44.5 36.1 26.9 21.6 MAX 74.6 59.7 43.3 60.1 35.8 94.9 30.6 28.6 82.6 64.1 39.4 26.7 (WY) 1999 1999 1999 1999 1999 2001 2001 1999 1999 1999 2001 1999 MIN 12.0 22.2 22.1 23.7 19.6 20.3 23.0 13.8 15.5 15.2 13.1 14.2 (WY) 2001 2001 2001 2001 2001 2000 2000 2001 2000 2000 2000 2000

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1999 - 2001

ANNUAL MEAN 18.6 30.7 34.6 HIGHEST ANNUAL MEAN 52.3 1999 LOWEST ANNUAL MEAN 20.8 2000 HIGHEST DAILY MEAN 136 Feb 14 507 Mar 15 871 Mar 14 1999 LOWEST DAILY MEAN 11 Oct 29 10 Jun 4 10 Jun 4 2001 ANNUAL SEVEN-DAY MINIMUM 12 Oct 23 12 May 20 12 May 20 2001 MAXIMUM PEAK FLOW 1270 Mar 3 2060 Jun 26 1999 MAXIMUM PEAK STAGE 182.52 Mar 3 183.39 Jun 26 1999 INSTANTANEOUS LOW FLOW 10 May 27 10 May 27 2001 ANNUAL RUNOFF (INCHES) 9.57 15.72 17.73 10 PERCENT EXCEEDS 24 49 51 50 PERCENT EXCEEDS 16 19 23 90 PERCENT EXCEEDS 12 12 13

e Estimated136 PERDIDO RIVER BASIN

02376500 PERDIDO RIVER AT BARRINEAU PARK, FL

LOCATION.--Lat 30 ° 41'25", long 87 ° 26'25", in NW 1 ⁄ 4 sec. 23, T. 4 S., R. 6 E., Baldwin County, Ala., Hydrologic Unit 03140106, on right bank 25 ft downstream from bridge on county road, 1,000 ft downstream from Alligator Creek, 0.5 mi southwest of Barrineau Park, and 27 mi upstream from mouth.

DRAINAGE AREA.--394 mi 2

.
PERIOD OF RECORD.--June 1941 to current year.

REVISED RECORDS.--WSP 1384: Drainage area. WRD FL-76-4: 1973-75 (M).

GAGE.--Water-stage recorder. Datum of gage is 25.77 ft above National Geodetic Vertical Datum of 1929. Prior to Aug. 22, 1949, nonrecording gage at same site and datum.

REMARKS.--Records good.

EXTREMES OUTSIDE PERIOD OF RECORD.--Flood of Mar. 15,1929, reached a stage of 25.7 ft present datum, from information by local resident (discharge not determined).

DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 202 174 490 668 676 324 556 259 248 298 624 492 2 198 175 440 609 616 327 511 255 241 272 539 457 3 195 175 405 538 567 417 475 254 223 273 468 479 4 192 176 381 479 504 2290 457 254 208 313 378 668 5 192 180 364 442 436 3800 446 250 200 332 329 756

6 196 188 351 417 386 4770 499 245 195 330 306 741 7 223 225 343 397 355 2670 439 238 202 327 310 681 8 210 274 337 389 334 1280 401 233 209 285 325 579 9 200 346 333 379 322 878 376 232 240 258 368 683 10 196 381 329 368 401 714 360 245 266 254 493 826

11 196 345 324 364 477 606 348 257 e650 312 579 816 12 194 293 319 372 470 1060 337 252 e1420 497 1470 723 13 192 270 313 368 429 2760 327 238 1400 731 1660 600 14 190 304 368 359 408 2320 336 227 1010 532 1340 484 15 189 334 497 356 394 2730 422 220 762 389 1380 406

16 187 316 546 405 375 3330 478 216 555 324 902 362 17 186 445 517 495 349 3100 439 213 431 294 769 335 18 185 536 469 570 325 2320 394 210 356 276 690 317 19 185 913 474 636 307 1370 361 208 314 269 985 308 20 184 1030 486 1040 296 1020 343 208 303 257 1240 306

21 184 814 473 1000 310 888 328 205 295 289 767 301 22 184 666 490 846 479 781 316 210 290 344 572 291 23 182 559 490 719 470 695 303 218 371 351 471 285 24 180 660 462 594 417 626 298 209 372 303 417 359 25 177 1470 432 503 395 577 314 204 306 330 380 421

26 177 1270 407 437 410 550 307 202 278 393 350 375 27 177 917 407 395 376 525 301 201 261 515 331 332 28 176 770 831 371 343 500 288 200 256 634 331 306 29 175 662 1080 359 --- 552 276 204 259 587 457 290 30 175 568 919 571 --- 622 266 209 315 632 443 278 31 174 --- 765 726 --- 596 --- 249 --- 560 441 ---

MEAN 189 515 479 522 415 1452 377 227 415 379 649 475 MAX 223 1470 1080 1040 676 4770 556 259 1420 731 1660 826 MIN 174 174 313 356 296 324 266 200 195 254 306 278 IN. .55 1.46 1.40 1.53 1.10 4.25 1.07 .66 1.17 1.11 1.90 1.35

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1941 - 2001, BY WATER YEAR (WY)

MEAN 513 614 715 948 967 1130 1010 706 664 696 706 735 MAX 2519 1865 2084 2636 2364 2791 3179 2402 2394 2023 2938 3460 (WY) 1996 1990 1954 1998 1990 1990 1983 1991 1989 1997 1975 1998 MIN 189 246 302 339 343 269 283 227 238 210 217 213 (WY) 2001 1956 1955 1957 1957 1955 1968 2001 1968 2000 2000 1968

SUMMARY STATISTICS FOR 2000 CALENDAR YEAR FOR 2001 WATER YEAR WATER YEARS 1941 - 2001

ANNUAL MEAN 322 509 782 HIGHEST ANNUAL MEAN 1372 1998 LOWEST ANNUAL MEAN 339 2000 HIGHEST DAILY MEAN 1470 Nov 25 4770 Mar 6 40800 Sep 29 1998 LOWEST DAILY MEAN 171 Aug 27 174 Oct 31 171 Aug 27 2000 ANNUAL SEVEN-DAY MINIMUM 175 Oct 28 175 Oct 28 175 Oct 28 2000 MAXIMUM PEAK FLOW 5300 Mar 6 44000 Sep 29 1998 MAXIMUM PEAK STAGE 12.89 Mar 6 26.30 Sep 29 1998 INSTANTANEOUS LOW FLOW 173 Oct 30 171 Aug 27 2000 ANNUAL RUNOFF (INCHES) 11.14 17.54 26.97 10 PERCENT EXCEEDS 483 837 1420 50 PERCENT EXCEEDS 300 368 508 90 PERCENT EXCEEDS 185 200 294

e Estimated

# ELEVATION OF LAKES138 SUWANNEE RIVER BASIN

304356082321700 JONES CREEK POND NEAR FARGO, GA

LOCATION.--Lat 30 ° 43'56", long 82 ° 32'17", Clinch County, Hydrologic Unit 03110201, attached to wooden post of walkway on upstream side of dam on Williamsburg Road in Superior Forest (private property), and 3.5 mi northeast of Fargo.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD.--February 1999 to current year.

GAGE.--Nonrecording gage.

REMARKS.--Records good. Weekly staff gage readings furnished by Suwannee Forest employees.

EXTREMES FOR PERIOD OF RECORD.--Maximum observed gage height, 6.04 ft, June 25, 2001; minimum observed gage height, 3.06 ft, July 10, 2000.

EXTREMES FOR CURRENT YEAR.--Maximum observed gage height, 6.04 ft, June 25; minimum observed gage height, 4.28 ft, June 4.

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 --- --- --- 5.04 --- --- --- --- --- --- --- --- 2 --- --- --- --- --- --- 5.52 --- --- 5.76 --- --- 3 --- --- --- --- --- --- --- --- --- --- --- --- 4 5.22 --- 4.96 --- --- --- 5.48 --- 4.28 --- --- 5.10 5 --- --- --- --- --- 5.08 --- --- --- --- --- ---

6 --- 5.00 4.94 --- --- --- --- --- --- --- 5.54 --- 7 --- --- --- --- --- --- --- 4.88 --- --- --- --- 8 --- --- --- --- --- --- --- 4.86 --- --- --- --- 9 5.18 --- --- 5.16 --- --- 5.40 --- --- 5.70 --- --- 10 --- --- --- --- --- --- --- --- --- --- --- 5.06

11 --- --- 4.94 --- --- --- --- --- 4.38 --- --- --- 12 --- --- --- --- 5.08 5.08 --- --- --- --- --- --- 13 --- 4.94 --- --- --- --- --- --- --- --- --- --- 14 --- --- --- --- --- --- --- 4.74 --- --- --- --- 15 --- --- --- 5.16 --- --- --- --- --- --- --- ---

16 5.12 --- --- --- 5.06 --- 5.26 --- --- 5.58 5.42 --- 17 5.12 --- --- --- --- --- --- --- --- --- --- --- 18 --- --- 4.90 --- --- --- --- --- 5.48 --- --- 5.00 19 --- --- --- --- --- 5.32 --- --- --- --- --- --- 20 --- 4.94 --- --- --- --- --- --- --- --- 5.34 ---

21 --- --- --- --- 5.08 --- --- 4.56 --- --- --- --- 22 --- --- --- 5.12 --- --- --- --- --- --- --- --- 23 5.08 --- --- --- --- --- 5.08 --- --- 5.34 --- --- 24 --- --- --- --- --- --- --- --- --- --- --- 5.04 25 --- --- --- --- --- --- --- --- 6.04 --- --- ---

26 --- --- 4.86 --- --- 5.48 --- --- --- 5.38 --- --- 27 --- 5.00 --- --- --- --- --- --- --- --- 5.18 --- 28 --- --- --- --- --- --- --- --- --- --- --- --- 29 --- --- --- 5.12 --- --- --- 4.32 --- --- --- --- 30 5.04 --- --- --- --- --- 5.00 --- --- 5.34 --- --- 31 --- --- --- --- --- --- --- --- --- --- --- ---139 SUWANNEE RIVER BASIN

304553082295000 GATOR CREEK DAM NEAR FARGO, GA

LOCATION.--Lat 30 ° 45'53", long 82 ° 29'50", Clinch County, Hydrologic Unit 03110201, attached to metal post on upstream side of concrete dam abutment on River Road in Superior Forest (private property), and 6.5 mi northeast of Fargo.

DRAINAGE AREA.--Not determined.

PERIOD OF RECORD.--February 1999 to current year.

GAGE.--Nonrecording gage.

REMARKS.--Records good. Weekly staff gage readings furnished by Suwannee Forest employees.

EXTREMES FOR PERIOD OF RECORD.--Maximum observed gage height, 6.34 ft, June 25, 2001, July 9, 2001; minimum observed gage height, 3.84 ft, July 10, 2000.

EXTREMES FOR CURRENT YEAR.--Maximum observed gage height, 6.34 ft, June 25, July 9; minimum observed gage height, 4.16 ft, Dec. 26.

GAGE HEIGHT, FEET, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 --- --- --- 4.44 --- --- --- --- --- --- --- --- 2 --- --- --- --- --- --- 6.00 --- --- 6.30 --- --- 3 --- --- --- --- --- --- --- --- --- --- --- --- 4 4.84 --- 4.26 --- --- --- 6.00 --- 4.98 --- --- 5.76 5 --- --- --- --- --- 4.56 --- --- --- --- --- ---

6 --- 4.30 4.24 --- --- --- --- --- --- --- 6.16 --- 7 --- --- --- --- --- --- --- 5.50 --- --- --- --- 8 --- --- --- --- --- --- --- 5.50 --- --- --- --- 9 4.78 --- --- 4.40 --- --- 5.96 --- --- 6.34 --- --- 10 --- --- --- --- --- --- --- --- --- --- --- 5.68

11 --- --- 4.24 --- --- --- --- --- 5.30 --- --- --- 12 --- --- --- --- 4.50 4.54 --- --- --- --- --- --- 13 --- 4.20 --- --- --- --- --- --- --- --- --- --- 14 --- --- --- --- --- --- --- 5.40 --- --- --- --- 15 --- --- --- 4.38 --- --- --- --- --- --- --- ---

16 4.64 --- --- --- 4.40 --- 5.82 --- --- 6.10 6.00 --- 17 4.60 --- --- --- --- --- --- --- --- --- --- --- 18 --- --- 4.22 --- --- --- --- --- 5.92 --- --- 5.66 19 --- --- --- --- --- 5.70 --- --- --- --- --- --- 20 --- 4.24 --- --- --- --- --- --- --- --- 5.90 ---

21 --- --- --- --- 4.44 --- --- 5.20 --- --- --- --- 22 --- --- --- 4.40 --- --- --- --- --- --- --- --- 23 4.52 --- --- --- --- --- 5.66 --- --- 5.90 --- --- 24 --- --- --- --- --- --- --- --- --- --- --- 5.64 25 --- --- --- --- --- --- --- --- 6.34 --- --- ---

26 --- --- 4.16 --- --- 5.78 --- --- --- 5.98 --- --- 27 --- 4.30 --- --- --- --- --- --- --- --- 5.78 --- 28 --- --- --- --- --- --- --- --- --- --- --- --- 29 --- --- --- 4.34 --- --- --- 4.98 --- --- --- --- 30 4.42 --- --- --- --- --- 5.62 --- --- 5.90 --- --- 31 --- --- --- --- --- --- --- --- --- --- --- ---140 OCHLOCKONEE RIVER BASIN

02329200 LAKE JACKSON NEAR TALLAHASSEE, FL

LOCATION.--Lat 30 ° 31'43", long 84 ° 21'30", in SW 1 ⁄ 4 sec. 32, T. 2 N., R. 1 W., Leon County, Hydrologic Unit 03120003, on southwest side of lake, east of U.S. Highway 27, and 6.0 mi northwest of Tallahassee.

SURFACE AREA.--4,001 acres (6.25 mi 2 ), at elevation 87.00 ft National Geodetic Vertical Datum of 1929.

DRAINAGE AREA.--43.2 mi 2

. PERIOD OF RECORD.--March 1950 to January 1953, March 1954 to August 1956, September 1956 to August 1958 (fragmentary), Septembe r 1958 to May 1990. June 1990 to current year (fragmentary). Records of elevation prior to October 1960 are available in file of the Geological Survey.

GAGE.--Nonrecording gage. Datum of gage is National Geodetic Vertical Datum of 1929.

REMARKS.-Lake has no surface outlet. Some outflow from lake through sinkhole to ground water.

EXTREMES FOR PERIOD OF RECORD.--Maximum daily elevation, 96.16 ft, June 18, 1966 (from recorded range in stage); minimum observed, 75.68 ft, Jan. 4, 1957.

EXTREMES FOR CURRENT YEAR.--Maximum observed elevation, 81.46 ft, Sept. 6; minimum observed, below 76.20 ft, elevations unknown

, many days from October to March.

ELEVATION (FEET NGVD), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY INSTANTANEOUS VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 --- --- <76.20 --- --- --- --- --- --- --- --- --- 2 --- --- --- --- --- --- 77.38 --- --- --- --- --- 3 --- <76.20 --- 76.35 --- --- --- --- --- --- --- --- 4 --- --- --- --- --- --- --- --- --- --- --- --- 5 --- --- --- --- 76.35 <76.20 --- --- --- --- --- ---

6 76.58 --- --- --- --- --- --- --- --- --- --- 81.46 7 --- --- --- --- --- --- --- --- 76.31 --- --- --- 8 --- --- <76.20 --- --- --- --- --- --- --- --- --- 9 --- --- --- --- --- --- --- --- --- --- --- --- 10 --- <76.20 --- <76.20 --- --- --- --- --- --- 81.39 ---

11 --- --- --- --- --- --- --- --- --- --- --- --- 12 --- --- --- --- 76.30 --- --- --- --- --- --- --- 13 <76.20 --- --- --- --- --- --- --- 77.28 --- --- --- 14 --- --- --- --- --- --- --- 76.65 --- --- --- --- 15 --- --- <76.20 --- --- --- --- --- --- --- --- ---

16 --- --- --- --- --- --- --- --- --- --- --- --- 17 --- <76.20 --- 76.31 --- --- --- --- --- --- --- --- 18 --- --- --- --- --- --- --- --- --- --- --- 81.30 19 --- --- --- --- --- --- --- --- --- --- --- --- 20 <76.20 --- --- --- --- --- --- --- --- --- --- ---

21 --- --- --- --- --- --- --- --- --- --- --- --- 22 --- --- <76.20 --- --- --- --- --- --- --- 81.40 --- 23 --- --- --- --- <76.20 --- --- --- --- --- --- --- 24 --- <76.20 --- <76.20 --- --- --- --- --- --- --- --- 25 --- --- --- --- --- --- --- 76.50 --- --- --- ---

26 --- --- --- --- --- --- --- --- 79.08 --- --- --- 27 <76.20 --- --- --- --- 77.20 --- --- --- --- --- --- 28 --- --- --- --- --- --- --- --- --- --- --- --- 29 --- --- <76.20 <76.20 --- --- --- --- --- --- --- --- 30 --- --- --- --- --- --- 76.90 --- --- --- --- --- 31 --- --- --- --- --- --- --- --- --- --- --- ---

< Actual value is known to be less than the value shown.141 OCHLOCKONEE RIVER BASIN

02329900 LAKE TALQUIN NEAR BLOXHAM, FL

LOCATION.--Lat 30 ° 23'15", long 84 ° 38'45", in SW 1 ⁄ 4 sec. 16, T.1 S., R.4 W., Leon County, Hydrologic Unit 03120003, at left upstream end of C.H. Corn Hydroelectric Dam on Ochlockonee River, 1.0 mi northwest of Bloxham, and 3.5 mi downstream from Oklawaha Creek.

SURFACE AREA.--6,850 acres (10.7 mi 2 ), at elevation 60.0 ft National Geodetic Vertical Datum, from data provided by Florida Power Corporation.

DRAINAGE AREA.--1,700 mi 2

. PERIOD OF RECORD.--January 1930 to September 1950 (month-end contents only, published only in WSP 1304); October 1951 to September 1960 (month-end elevations and contents); October 1960 to September 1982, March 1985 to September 30 1992 (month-end elevations, contents and daily elevations); October 1,1992 to current year, daily elevations.

REVISED RECORDS.--WSP 1905, WRD FL-76-4: Drainage area.

GAGE.--Nonrecording gage and water-stage recorder. Datum of gage is National Geodetic Vertical Datum of 1929.

REMARKS.--Reservoir is formed by concrete dam with riprapped earth embankments. Spillway is equipped with seven taintor gates, each 16ft high by 25 ft wide. Storage began in June 1929; water in lake first reached minimum operating level January 1930. Usable capacity, 69,800 acre-ft between elevations, 60.0 ft, minimum operating level, and 68.5 ft, top of closed taintor gates. Dead storage is unknown. Contents are available by request.

EXTREMES FOR PERIOD OF RECORD.--Maximum daily contents, 99,400 acre-ft, Sept. 22, 1969, elevation, 71.16 ft; maximum instantaneous elevation, 71.60 ft, Sept. 22, 1969; minimum daily elevation after January 1930, 48.70 ft, Oct. 22,23, 1957 (earth embankment breached).

EXTREMES FOR CURRENT YEAR.--Maximum daily contents, 73,900 acre-ft, Dec. 29, elevation, 68.91 ft; minimum daily contents, 65,60 0 acre-ft, Aug. 8, elevation, 68.06 ft.

ELEVATION (FEET NGVD), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 68.48 68.50 68.44 68.75 68.72 68.69 68.44 68.52 68.20 68.65 68.78 68.55 2 68.49 68.49 68.48 68.71 68.66 68.70 68.55 68.54 68.20 68.71 68.68 68.66 3 68.51 68.48 68.53 68.68 68.64 68.69 68.49 68.56 68.20 68.66 68.40 68.71 4 68.50 68.48 68.55 68.67 68.62 68.77 68.53 68.56 68.21 68.60 68.35 68.72 5 68.47 68.47 68.55 68.67 68.63 68.71 68.60 68.56 68.20 68.43 68.25 68.69

6 68.46 68.46 68.58 68.69 68.69 68.66 68.68 68.57 68.19 68.41 68.11 68.48 7 68.53 68.45 68.60 68.69 68.71 68.65 68.52 68.58 68.17 68.55 68.22 68.57 8 68.52 68.44 68.64 68.68 68.71 68.71 68.45 68.56 68.18 68.67 68.06 68.51 9 68.50 68.43 68.67 68.66 68.71 68.73 68.59 68.53 68.23 68.66 68.06 68.55 10 68.44 68.44 68.71 68.64 68.72 68.77 68.59 68.51 68.32 68.49 68.17 68.55

11 68.44 68.43 68.64 68.65 68.73 68.70 68.52 68.49 68.53 68.51 68.20 68.51 12 68.47 68.42 68.53 68.69 68.75 68.71 68.45 68.48 68.62 68.46 68.34 68.51 13 68.50 68.41 68.48 68.72 68.71 68.86 68.50 68.48 68.17 68.43 68.56 68.48 14 68.52 68.43 68.48 68.74 68.71 68.86 68.56 68.47 68.17 68.38 68.59 68.46 15 68.53 68.43 68.58 68.75 68.71 68.79 68.51 68.43 68.33 68.34 68.56 68.46

16 68.54 68.43 68.62 68.76 68.71 68.60 68.48 68.40 68.23 68.44 68.48 68.43 17 68.55 68.47 68.66 68.71 68.71 68.44 68.43 68.36 68.19 68.54 68.51 68.42 18 68.56 68.51 68.73 68.66 68.74 68.49 68.46 68.34 68.34 68.61 68.55 68.45 19 68.57 68.55 68.74 68.60 68.74 68.51 68.43 68.31 68.50 68.68 68.54 68.48 20 68.58 68.58 68.74 68.68 68.72 68.59 68.42 68.32 68.61 68.76 68.49 68.51

21 68.58 68.60 68.68 68.77 68.72 68.68 68.45 68.34 68.63 68.77 68.43 68.54 22 68.58 68.63 68.64 68.79 68.71 68.64 68.49 68.33 68.63 68.60 68.50 68.55 23 68.58 68.66 68.61 68.76 68.72 68.51 68.53 68.34 68.61 68.51 68.55 68.57 24 68.56 68.68 68.57 68.73 68.72 68.45 68.54 68.31 68.50 68.48 68.52 68.59 25 68.55 68.61 68.61 68.75 68.70 68.53 68.57 68.27 68.49 68.51 68.50 68.57

26 68.54 68.52 68.65 68.76 68.70 68.53 68.57 68.26 68.45 68.53 68.50 68.57 27 68.53 68.51 68.67 68.76 68.69 68.52 68.50 68.21 68.41 68.59 68.47 68.55 28 68.52 68.49 68.80 68.77 68.65 68.48 68.43 68.18 68.37 68.62 68.46 68.51 29 68.51 68.47 68.91 68.76 --- 68.43 68.46 68.17 68.35 68.63 68.44 68.49 30 68.51 68.44 68.84 68.78 --- 68.42 68.51 68.19 68.49 68.64 68.45 68.42 31 68.50 --- 68.80 68.77 --- 68.42 --- 68.19 --- 68.67 68.48 ---

MEAN 68.52 68.50 68.64 68.72 68.70 68.62 68.51 68.40 68.36 68.57 68.43 68.54 MAX 68.58 68.68 68.91 68.79 68.75 68.86 68.68 68.58 68.63 68.77 68.78 68.72 MIN 68.44 68.41 68.44 68.60 68.62 68.42 68.42 68.17 68.17 68.34 68.06 68.42

CAL YR 2000 MEAN 68.36 MAX 68.91 MIN 67.44 WTR YR 2001 MEAN 68.54 MAX 68.91 MIN 68.06142143



# WELL DESCRIPTIONS AND GROUND-WATER DATA144



## Figure 13. Location of wells in Wakulla County. Location of Wakulla County SITE NUMBER WELL AND MAP NUMBER
300740084293001 

## 1

1 EXPLANATION

0 5 10 MILES

G U

L



### F 

## O 

## F 

## M 

## E 

## X I C O 

## WAKULLA

375 369 319

319

319 98 98 98

St Marks Shadev ille
Crawfordville

Sopchoppy
Panacea145 WELL DESCRIPTIONS AND WATER LEVEL MEASUREMENTS WAKULLA COUNTY

WELL NUMBER.--300740084293001. USGS Observation Well near Crawfordville, FL.

LOCATION.--Lat 30 ° 07'40", long 84 ° 29'30", in NW 1 ⁄ 4 NE 1 ⁄ 4 NW 1 ⁄ 4 sec.24, T.4 S., R.3 W., Hydrologic Unit 03120003, 400 ft east of Sopchoppy River, 6.6 mi southwest of intersection of Forest Road 365 and State Highway 368, and 7.8 mi west of Crawfordville.

AQUIFER.--Hawthorne Limestone aquifer of the Miocene System, Geologic Unit 122 HTRNN.

WELL CHARACTERISTICS.--Drilled, bench mark, artesian well, diameter 6 in., depth 127 ft, cased to 121 ft.

INSTRUMENTATION.--Water-level recorder.

DATUM.--Land-surface datum is 46.91 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of recorder shelf, 2.90 ft above land-surface datum.

PERIOD OF RECORD.--January 1967 to September 1998, March to September 2000. Records of water levels prior to January 1974 are available in files of the Geological Survey.

EXTREMES FOR PERIOD OF RECORD.--Highest water level, 36.91 ft NGVD, July 31, 1975; lowest, 24.42 ft NGVD, Sept. 14, 1966.

ELEVATION (FEET NGVD), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MAXIMUM VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 33.87 31.84 32.07 --- 31.90 31.54 33.61 31.79 30.62 --- 34.08 32.62 2 33.67 31.81 32.06 --- 31.95 31.58 33.50 31.76 30.67 --- 34.28 32.74 3 33.48 31.77 32.04 32.04 31.97 31.59 33.41 31.68 30.68 33.27 34.38 32.88 4 33.34 31.75 31.98 32.05 31.99 31.69 33.34 31.61 30.66 33.25 34.38 33.02 5 33.20 31.75 31.97 32.08 31.98 31.73 33.29 31.56 30.63 --- 34.33 33.07

6 33.10 31.72 31.97 32.05 31.95 31.78 33.24 31.52 30.61 33.22 35.08 33.12 7 33.17 31.67 31.95 32.01 31.89 31.78 33.20 31.45 30.59 33.24 35.78 33.15 8 33.22 31.63 31.92 32.02 31.85 31.77 33.14 31.37 30.57 33.24 35.80 33.15 9 33.21 31.67 31.89 31.91 31.83 31.91 33.07 31.35 30.58 33.24 35.77 33.15 10 33.17 31.63 31.86 31.86 31.82 32.04 33.02 31.28 30.61 33.30 35.48 33.15

11 33.11 31.62 31.84 31.90 31.77 32.14 32.94 31.25 30.88 33.44 35.08 33.10 12 33.02 31.59 31.83 31.94 31.75 32.37 32.83 31.21 31.33 33.58 34.83 33.14 13 32.93 31.59 31.78 31.97 31.72 32.81 32.75 31.17 31.86 33.62 34.62 33.16 14 32.84 31.58 31.78 32.00 31.71 33.20 32.67 31.13 32.20 33.62 34.48 33.16 15 32.77 31.51 31.86 32.01 31.71 33.58 32.64 31.06 32.30 33.53 34.38 33.14

16 32.71 31.53 31.93 32.00 31.70 33.74 32.62 31.04 32.33 33.41 34.24 33.03 17 32.62 31.53 31.93 31.99 31.70 33.76 32.56 30.98 32.33 33.32 34.12 32.91 18 32.55 31.46 31.92 31.98 31.59 33.80 32.46 30.92 32.29 33.18 34.02 32.80 19 32.48 31.51 31.96 31.99 31.56 33.90 32.40 30.86 32.30 33.10 33.94 32.70 20 32.40 31.48 31.89 31.96 31.56 34.00 32.35 30.83 32.29 33.04 33.81 32.61

21 32.33 31.46 31.89 31.92 31.55 34.17 32.28 30.82 32.29 33.03 33.72 32.53 22 32.27 31.46 31.87 31.96 31.56 34.25 32.23 30.77 32.48 33.03 33.61 32.49 23 32.20 31.47 31.81 31.96 31.53 34.21 32.20 30.74 32.87 32.99 33.48 32.49 24 32.15 31.59 31.80 31.95 31.50 34.06 32.17 30.69 33.00 33.08 33.38 32.52 25 32.13 31.82 31.77 31.91 31.49 33.88 32.12 30.64 33.02 33.26 33.27 32.60

26 32.09 31.96 31.74 31.86 31.47 33.75 32.07 30.61 33.02 33.31 33.17 32.65 27 32.04 32.03 31.77 31.85 31.46 33.57 32.01 30.56 32.98 33.33 33.12 32.69 28 31.99 32.06 31.93 31.83 31.45 33.44 31.96 30.52 32.93 33.33 33.03 32.69 29 31.94 32.07 31.97 31.83 --- 33.58 31.91 30.47 32.85 33.39 32.89 32.66 30 31.89 32.07 32.00 31.87 --- 33.61 31.83 30.48 32.76 33.41 32.80 32.56 31 31.86 --- 32.01 31.89 --- 33.62 --- 30.51 --- 33.65 32.70 ---

MEAN 32.70 31.69 31.90 --- 31.71 33.00 32.66 31.05 31.82 --- 34.13 32.86 MAX 33.87 32.07 32.07 --- 31.99 34.25 33.61 31.79 33.02 --- 35.80 33.16 MIN 31.86 31.46 31.74 --- 31.45 31.54 31.83 30.47 30.57 --- 32.70 32.49

1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 28 30 32 34 36 38ELEVATION, IN FEET Gap indicates missing record146



## Figure 14. Location of wells in Washington County. 0 10 MILES 

# WASHINGTON



# 1

SITE NUMBER WELL AND MAP NUMBER
303025085350501 

# 1 EXPLANATION Greenhead Location of Washington

County147 WELL DESCRIPTIONS AND WATER LEVEL MEASUREMENTS W A SH I NGT O N C O UNTY

WELL NUMBER.--303025085350501. Local Number 422A. USGS Observation Well near Wausau, Fl.

LOCATION.--Lat 30 ° 30'25", long 85 ° 35'05", in SE 1 ⁄ 4 NW 1 ⁄ 4 NW 1 ⁄ 4 sec. 7, T. 1 N., R. 13 W., Hydrologic Unit 03140101, 0.6 mi east of road to Deadening Cemetery, 4.2 mi east of State Highway 77, and 8.6 mi south of Wausau.

AQUIFER.--Floridan aquifer of the Tertiary system, Geologic Unit 120 FLRD.

WELL CHARACTERISTICS.--Drilled, observation, artesian well, diameter 4 in., depth 150 ft, cased to 110 ft.

INSTRUMENTATION.--Water-level recorder.

DATUM.--Land-surface datum is 66.11 ft above National Geodetic Vertical Datum of 1929. Measuring point: Top of casing, 2.90 ft above land-surface datum.

PERIOD OF RECORD.--October 1962 to September 1989, October 1997 to current year.

EXTREMES FOR PERIOD OF RECORD.--Highest water level, 65.75 ft NGVD, Oct. 1,2, 1979; lowest, 47.33 ft NGVD, June 10, 2001.

ELEVATION (FEET NGVD), WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MAXIMUM VALUES

DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP

1 51.91 50.74 50.17 49.46 48.73 48.04 48.95 48.46 47.54 47.97 48.15 52.45 2 51.88 50.71 50.16 49.43 48.72 47.99 48.95 48.44 47.51 47.97 48.19 52.56 3 51.84 50.67 50.13 49.40 48.68 47.99 48.95 48.35 47.48 47.98 48.30 52.62 4 51.81 50.66 50.08 49.40 48.68 47.93 48.97 48.33 47.45 47.99 48.33 52.66 5 51.76 50.63 50.07 49.38 48.67 47.91 48.97 48.30 47.42 47.99 48.57 52.69

6 51.73 50.58 50.07 49.35 48.63 47.90 48.98 48.27 47.41 47.98 51.63 52.72 7 51.66 50.53 50.03 49.32 48.61 47.90 48.97 48.23 47.40 47.98 51.23 52.76 8 51.62 50.50 49.96 49.31 48.57 47.86 48.97 48.19 47.38 47.98 51.20 52.77 9 51.57 50.49 49.93 49.23 48.56 47.84 48.97 48.19 47.34 47.98 51.24 52.77 10 51.56 50.47 49.90 49.21 48.55 47.82 48.96 48.15 47.33 47.98 51.45 52.77

11 51.52 50.44 49.88 49.23 48.50 47.77 48.95 48.12 47.45 48.00 51.55 52.80 12 51.49 50.42 49.86 49.23 48.50 47.77 48.91 48.09 47.57 48.05 51.66 52.79 13 51.44 50.38 49.81 49.17 48.46 47.77 48.88 48.07 47.69 48.08 51.77 52.80 14 51.40 50.35 49.80 49.15 48.44 47.97 48.88 48.02 47.76 48.08 51.88 52.80 15 51.38 50.31 49.78 49.14 48.44 48.00 48.87 47.98 47.83 48.08 51.92 52.78

16 51.35 50.30 49.79 49.12 48.38 48.01 48.87 47.96 47.91 48.08 52.04 52.74 17 51.27 50.26 49.77 49.06 48.38 48.11 48.83 47.93 47.94 48.07 52.12 52.73 18 51.24 50.21 49.72 49.04 48.27 48.18 48.79 47.89 47.96 48.07 52.15 52.73 19 51.21 50.21 49.72 49.04 48.27 48.32 48.77 47.86 47.98 48.06 52.17 52.71 20 51.16 50.19 49.65 48.98 48.27 48.40 48.74 47.83 48.00 48.06 52.21 52.71

21 51.13 50.17 49.65 48.94 48.25 48.52 48.72 47.79 48.02 48.06 52.23 52.70 22 51.09 50.13 49.63 48.93 48.24 48.61 48.70 47.75 48.03 48.05 52.25 52.68 23 51.04 50.13 49.59 48.92 48.20 48.66 48.70 47.72 48.06 48.03 52.27 52.65 24 51.01 50.15 49.58 48.91 48.14 48.71 48.67 47.69 48.02 48.01 52.29 52.71 25 50.98 50.15 49.55 48.88 48.14 48.75 48.65 47.66 48.00 47.96 52.29 52.71

26 50.94 50.17 49.52 48.84 48.08 48.77 48.62 47.64 47.99 47.95 52.30 52.69 27 50.90 50.17 49.52 48.84 48.07 48.80 48.57 47.62 47.97 47.95 52.32 52.70 28 50.86 50.17 49.56 48.84 48.06 48.87 48.54 47.60 47.97 47.95 52.30 52.69 29 50.84 50.17 49.49 48.82 --- 48.97 48.52 47.57 47.97 47.97 52.30 52.66 30 50.80 50.17 49.48 48.82 --- 48.93 48.46 47.54 47.97 48.01 52.31 52.62 31 50.75 --- 49.47 48.78 --- 48.95 --- 47.53 --- 48.09 52.32 ---

MEAN 51.33 50.35 49.78 49.10 48.41 48.26 48.81 47.96 47.74 48.01 51.39 52.71 MAX 51.91 50.74 50.17 49.46 48.73 48.97 48.98 48.46 48.06 48.09 52.32 52.80 MIN 50.75 50.13 49.47 48.78 48.06 47.77 48.46 47.53 47.33 47.95 48.15 52.45

O N D 1997 J F M A M J J A S O N D 1998 J F M A M J J A S O N D 1999 J F M A M J J A S O N D 2000 J F M A M J J A S 2001 45 50 55 60 65ELEVATION, IN FEET Gap indicates missing record148

# MISCELLANEOUS WATER LEVEL MEASUREMENTS

## 150 MISCELLANEOUS WATER LEVEL MEASUREMENTS OCTOBER 2000 TO SEPTEMBER 2001

STATION NUMBER STATION NAME DATE OF SAMPLE DEPTH BELOW LAND SURFACE (WATER LEVEL) (FEET)

CLINCH, GA

304738082265001 Perimeter Road Well near Fargo 10-17-00 7.63

12-06-00 10.21

01-29-01 9.17

03-05-01 8.70

04-04-01 6.59

05-08-01 8.19

06-04-01 9.74

07-26-01 7.03

304741082263101 Bay Creek Well near Fargo 10-17-00 3.77

12-06-00 5.34

01-29-01 4.52

03-05-01 3.13

04-04-01 2.19

05-08-01 5.35

06-04-01 6.15

07-26-01 3.07

304825082290401 Steedley Field Well near Fargo 10-17-00 3.68

12-06-00 4.84

01-29-01 3.94

03-05-01 1.97

04-04-01 1.44

05-08-01 4.37

06-04-01 7.56

07-26-01 1.33

## INDEX 151



## A Alapaha River near Jennings, FL

. . . . . . . . . . . . . . . . . . . . . . 57 Alaqua Creek near Pleasant Ridge, FL. . . . . . . . . . . . . . . . . . . . 121 Alligator Creek near Fargo, GA . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Apalachicola River at Chattahoochee, FL . . . . . . . . . . . . . . . . . 102 Apalachicola River near Blountstown, FL . . . . . . . . . . . . . . . . . 104 Apalachicola River near Sumatra, FL. . . . . . . . . . . . . . . . . . . . . 111 Aucilla River at Lamont, FL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86



## B Bay Creek near Fargo, GA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Bayou Marcus Creek near Pensacola, FL. . . . . . . . . . . . . . . . . . 133 Big Coldwater Creek near Milton, FL . . . . . . . . . . . . . . . . . . . . 129 Blackwater River near Baker, FL . . . . . . . . . . . . . . . . . . . . . . . . 128 Bruce Creek at SH 81 near Redbay, FL . . . . . . . . . . . . . . . . . . . 118 Brushy Creek near Bratt, FL. . . . . . . . . . . . . . . . . . . . . . . . . . . . 135



## C Chipola River at Cockran Landing near Wewahitchka, FL

. . . 109 Chipola River at Marianna, FL . . . . . . . . . . . . . . . . . . . . . . . . . . 107 Chipola River near Altha, FL . . . . . . . . . . . . . . . . . . . . . . . . . . . 108 Choctawhatchee River near Bruce, FL . . . . . . . . . . . . . . . . . . . . 120 Choctawhatchee River near Caryville, FL . . . . . . . . . . . . . . . . . 117 Choctawhatchee River near Pittman, FL . . . . . . . . . . . . . . . . . . 115 Cypress Creek near Edith, GA . . . . . . . . . . . . . . . . . . . . . . . . . . . 52



## E Econfina Creek near Bennett, FL . . . . . . . . . . . . . . . . . . . . . . . . 114 Econfina River near Perry, FL . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Elevenmile Creek near Pensacola, FL . . . . . . . . . . . . . . . . . . . . 134 Escambia River near Century, FL. . . . . . . . . . . . . . . . . . . . . . . . 131 Escambia River near Molino, FL . . . . . . . . . . . . . . . . . . . . . . . . 132



## F Fenholloway River near Foley, FL . . . . . . . . . . . . . . . . . . . . . . . . 83 Fenholloway River near Perry, FL . . . . . . . . . . . . . . . . . . . . . . . . 84



## G Gator Creek Dam near Fargo, GA . . . . . . . . . . . . . . . . . . . . . . . 139



## J Jones Creek Pond near Fargo, GA . . . . . . . . . . . . . . . . . . . . . . . 138



## L Lake Jackson near Tallahassee, FL. . . . . . . . . . . . . . . . . . . . . . . 140 Lake Talquin near Bloxham, FL. . . . . . . . . . . . . . . . . . . . . . . . . 141 Little River near Midway, FL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 Lost Creek at Arran, FL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91



## M Martin Bayou at US 98 at Springfield, FL

. . . . . . . . . . . . . . . 113 Muddy Branch near Marianna, FL . . . . . . . . . . . . . . . . . . . . . . . 106 Miscellaneous Water-level measurements . . . . . . . . . . . . . . . . . 150 

## N New River near Lake Butler, FL

. . . . . . . . . . . . . . . . . . . . . . 69 New River near Sumatra, FL . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 North Fork Suwannee River at Sill near Fargo, GA. . . . . . . . . . . 50



## O Ochlockonee River near Bloxham, FL . . . . . . . . . . . . . . . . . . . . . 97 Ochlockonee River near Concord, FL . . . . . . . . . . . . . . . . . . . . . 93 Ochlockonee River near Havana, FL . . . . . . . . . . . . . . . . . . . . . . 94 Ochlockonee River near Smith Creek, FL . . . . . . . . . . . . . . . . . . 99



## P Perdido River at Barrineau Park, FL

. . . . . . . . . . . . . . . . . . 136 Pond Creek near Milton, FL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130



## S Santa Fe River at US HWY 441 near High Springs, FL

. . . . . . 72 Santa Fe River at Worthington Springs, FL . . . . . . . . . . . . . . . . . 70 Santa Fe River near Fort White, FL . . . . . . . . . . . . . . . . . . . . . . . 73 Santa Fe River near Hildreth, FL . . . . . . . . . . . . . . . . . . . . . . . . . 74 Shoal River near Crestview, FL . . . . . . . . . . . . . . . . . . . . . . . . . 127 Shoal River near Mossy Head, FL . . . . . . . . . . . . . . . . . . . . . . . 126 Sopchoppy River near Sopchoppy, FL. . . . . . . . . . . . . . . . . . . . . 92 Spring Creek near Reynoldsville, GA . . . . . . . . . . . . . . . . . . . . 101 St. Marks River near Newport, FL . . . . . . . . . . . . . . . . . . . . . . . . 90 Steinhatchee River near Cross City, FL . . . . . . . . . . . . . . . . . . . . 82 Suwannee River above Gopher River near Suwannee, FL. . . . . . 78 Suwannee River at Branford, FL . . . . . . . . . . . . . . . . . . . . . . . . . 67 Suwannee River at Dowling Park, FL . . . . . . . . . . . . . . . . . . . . . 63 Suwannee River at Ellaville, FL. . . . . . . . . . . . . . . . . . . . . . . . . . 61 Suwannee River at Luraville, FL . . . . . . . . . . . . . . . . . . . . . . . . . 65 Suwannee River at Sill near Fargo, GA . . . . . . . . . . . . . . . . . . . . 48 Suwannnee River at White Springs, FL . . . . . . . . . . . . . . . . . . . . 55 Suwannee River near Bell, FL . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Suwannee River near Benton, FL. . . . . . . . . . . . . . . . . . . . . . . . . 53 Suwannee River near Wilcox, FL. . . . . . . . . . . . . . . . . . . . . . . . . 76



## T Telogia Creek near Bristol, FL . . . . . . . . . . . . . . . . . . . . . . . . . . . 98



## W Waccassassa River near Gulf Hammock, FL . . . . . . . . . . . . . . . . 45 Ward Creek bl Mitchell Pond near Metcalf, GA . . . . . . . . . . . . . 89 Well Descriptions and Ground-Water Data Wakulla County

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 Washington County . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147 Withlacoochee River near Lee, FL. . . . . . . . . . . . . . . . . . . . . . . . 60 Withlacoochee River near Pinetta, FL . . . . . . . . . . . . . . . . . . . . . 59 Wrights Creek at SH 177A near Bonifay, FL. . . . . . . . . . . . . . . 116



## Y Yellow River at Milligan, FL . . . . . . . . . . . . . . . . . . . . . . . . . . . 123 Yellow River near Oak Grove, FL

. . . . . . . . . . . . . . . . . . . . 122 

## INDEX

### 152