Prepared in cooperation with the 

City of Brunswick and Glynn County 

U.S. Geological Survey Georgia Water Science Center 

and City of Brunswick– Glynn County Cooperative 

Water Program—Summary of Activities, 

July 2005 through June 2006 

Open-File Report 2006-1368


U.S. Department of the Interior 

U.S. Geological Survey 
Cover photograph: Sydney Lanier Bridge, Brunswick, Glynn County, Georgia

Photograph by Alan M. Cressler, U.S. Geological Survey, 2005
U.S. Geological Survey Georgia Water Science Center 

and City of Brunswick–Glynn County Cooperative 

Water Program—Summary of Activities, 

July 2005 through June 2006

By Gregory S. Cherry

Prepared in cooperation with the 

City of Brunswick and Glynn County

U.S. Department of the Interior

U.S. Geological Survey

Open-File Report 2006-1368
U.S. Department of the Interior

DIRK KEMPTHORNE, Secretary

U.S. Geological Survey

Mark D. Myers, Director

U.S. Geological Survey, Reston, Virginia: 2007

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Suggested citation:

Cherry, G.S., 2007, U.S. Geological Survey Georgia Water Science Center and City of Brunswick–Glynn County 

Cooperative Water Program—Summary of Activities, July 2005 through June 2006: U.S. Geological Survey 

Open-File Report 2006-1368, 64 p., Web-only publication at http://pubs.usgs.gov/ofr2006/1368/. 
Contents

Abstract..................................................................................................................................................... 1

Introduction............................................................................................................................................... 1

Purpose and Scope ........................................................................................................................ 2

Related Studies ............................................................................................................................... 2

Progress and Significant Technical Findings during Fiscal Year 2006............................................ 2

Ground-Water-Level and Chloride Monitoring .......................................................................... 2

Geophysical Logging...................................................................................................................... 2

Reports and Technical Presentations ......................................................................................... 3

Reports..................................................................................................................................... 3

Technical Presentations ....................................................................................................... 3

Coastal Sound Science Initiative ................................................................................................. 3

Hydrologic Conditions............................................................................................................................. 6

Precipitation..................................................................................................................................... 6

Ground-Water Pumpage................................................................................................................ 6

Ground-Water Levels ..................................................................................................................... 6

Chloride and Sulfate Concentration ............................................................................................ 6

Upper Floridan aquifer.......................................................................................................... 7

Surficial and Brunswick Aquifer Systems......................................................................... 7

References Cited...................................................................................................................................... 8

Appendix A. Records of Geophysical Logs from Well 34G003 Collected during 

October 2005.............................................................................................................................. 25

Appendix B. Georgia Environmental Protection Division/MACTEC Saltwater Intrusion 

Monitoring Program Report.................................................................................................... 27

Appendix C. Hydrographs and Water-Level Statistics for Selected Wells in the 

City of Brunswick–Glynn County, Georgia, Area ................................................................ 33

iii
iv

Figures

1. Map showing location of study and continuous ground-water-level 

monitoring network in the Brunswick–Glynn County area, Georgia ............................. 4

2. Graphs showing cumulative departure from normal precipitation and total 

daily precipitation at Coastal Georgia Community College, Georgia, 1999–2006....... 12

3. Bar graphs showing major ground-water pumpage from the Upper Floridan 

aquifer in the Brunswick–Glynn County area, Georgia, 1980–2005.............................. 13

4–7. Maps showing ground-water levels in the—

4. Surficial aquifer system in coastal Georgia, 2005...................................................14

5. Brunswick aquifer system in coastal Georgia, 2005...............................................15

6. Upper Floridan aquifer in the Brunswick area, Georgia, 2004–2005....................16

 7. Lower Floridan aquifer in the central and southern coastal areas, 

Georgia, 2005 .................................................................................................................17

8. Map showing chloride-monitoring network in the Brunswick–Glynn County 

area, Georgia, June 2005; chloride-monitoring network in the Brunswick 

area, Georgia, June 2005..................................................................................................... 18

9–10. Graphs showing chloride concentration in water for selected wells in the—

9. Southern Brunswick area, Georgia, 1968–2005.......................................................20

10. Northern Brunswick area, Georgia, 1966–2005.......................................................21

11. Maps showing chloride concentration in the Upper Floridan aquifer in the 

Brunswick area, Georgia, June 2004 and June 2005...................................................... 22

12. Graphs showing chloride concentration in observation wells in the surficial 

and Brunswick aquifer systems, in the Brunswick area, Georgia, 1983–2005........... 23

A1. Examples of geophysical logs collected from an unused irrigation well, located 

near the access road to Jekyll Island, using a multiparameter logging tool.............. 26

Tables

1. Brunswick–Glynn County, Georgia, monitoring network, fiscal year 2006................... 5

2. Chloride and sulfate concentrations of water samples collected during 

June 2003, 2004, and 2005 and specific conductance of water samples 

collected during June 2005 ................................................................................................. 10
Conversion Factors and Datum

Multiply By To obtain

Length

inch (in.) 2.54 centimeter (cm)

foot (ft) 0.3048 meter (m)

mile (mi) 1.609 kilometer (km)

Area

square foot (ft2

) 0.09290 square meter (m2)

square mile (mi2

) 2.590 square kilometer (km2) 

Volume

gallon (gal) 3.785 liter (L) 

million gallons (Mgal) 3,785 cubic meter (m3

)

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:

°F = (1.8×°C)+32

Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:

°C = (°F–32)/1.8

Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).

Altitude, as used in this report, refers to distance above the vertical datum.

Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (μS/cm at 25 °C).

Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L) or 

micrograms per liter (μg/L).

Abstract

Since 1959, the U.S. Geological Survey has conducted 

a cooperative water resources program (CWP) with the City 

of Brunswick and Glynn County in the Brunswick, Georgia, 

area. Since the late 1950s, the salinity of ground water in the 

Upper Floridan aquifer near downtown Brunswick, Georgia, 

has been increasing, and its occurrence has been detected 

across an area of increasing size. Pumping of the Upper Floridan aquifer near downtown Brunswick has lowered water levels in the aquifer and resulted in an upward hydraulic gradient 

between the highly saline parts of the Lower Floridan aquifer 

and the normally fresh Upper Floridan aquifer. Saltwater 

likely enters the Upper Floridan aquifer through localized, 

vertically oriented conduits of relatively high permeability 

and moves laterally in response to the distribution of stresses 

within the aquifer.

The Brunswick–Glynn County CWP for fiscal year 2006 

includes the operation and maintenance of 12 continuous 

water-level recorders. In addition, water-level data were collected from 52 wells and water from 70 wells was analyzed 

for chloride concentration during June 2005. Geophysical 

logs were obtained from one well to assess whether the cause 

of elevated chloride concentration could be due to leaky well 

casing. A summary of the Georgia Department of Natural 

Resources, Environmental Protection Division (GaEPD) 

Georgia Coastal Sound Science Initiative (CSSI) activities 

that directly benefit the CWP–Brunswick–Glynn County is 

included in this report. The GaEPD CSSI is a program of 

scientific and feasibility studies to support development of 

a final strategy to protect the Upper Floridan aquifer from 

saltwater contamination. These data presented in this report 

are needed by State and local authorities to manage water 

resources effectively in the coastal area of Georgia.

Introduction

In the Brunswick, Georgia, area, saltwater has been 

contaminating the Upper Floridan aquifer for more than 

50 years, so that presently (2006) within an area of several 

square miles (mi2) in downtown Brunswick, the aquifer 

yields water that has a chloride concentration greater than 

2,000 milligrams per liter (mg/L) and is above the 250 mg/L 

State and Federal secondary drinking-water standard (Georgia 

Environmental Protection Division, 1997; U.S. Environmental 

Protection Agency, 2000). Saltwater contamination has constrained further development of the Upper Floridan aquifer in 

the Brunswick area, prompting interest in the development 

of alternative sources of water supply, primarily from the 

shallower surficial and Brunswick aquifer systems.

The Federal-State Cooperative Water Program (CWP) is 

a partnership between the U.S. Geological Survey (USGS) and 

State and local agencies that provides information that forms 

the foundation for many of the Nation’s water-resource management and planning activities. The Brunswick–Glynn County 

CWP between the USGS, the City of Brunswick, and Glynn 

County has been in existence since 1959. Current cooperating 

entities are the City of Brunswick, Glynn County, the Jekyll 

Island Authority, Sea Island Corporation, Hercules–Pinova, 

and Georgia–Pacific Cellulose. The Brunswick–Glynn County 

CWP was initiated in response to concern about chloride contamination of the Upper Floridan aquifer, which first became 

evident during the 1940s and 1950s. Since inception, the 

Brunswick–Glynn County CWP has placed emphasis on providing the necessary information about the Floridan aquifer 

system to manage saltwater intrusion and evaluate waterresources data. During fiscal year 2006 (FY 2006), the monitoring program was continued, including continuous water-level 

recording and mapping of the potentiometric surface and chloride 

concentration of the Upper Floridan aquifer. Additional well and 

borehole-geophysical data also were collected during FY 2006. 

U.S. Geological Survey Georgia Water Science Center 

and City of Brunswick–Glynn County Cooperative 

Water Program—Summary of Activities, 

July 2005 through June 2006

By Gregory S. Cherry

Introduction 
Purpose and Scope

Hydrologic, geologic, and water-quality data are needed 

to manage water resources effectively in the coastal area of 

Georgia. The Georgia Department of Natural Resources, 

Environmental Protection Division (GaEPD) capped permitted withdrawals from the Upper Floridan aquifer at 1997 levels 

in Glynn County; therefore, an understanding of the available 

water supply and potential alternative water sources has grown 

in importance. During FY 2006, 12 continuous water-level 

recorders were maintained under the Brunswick–Glynn 

County CWP. In addition, water levels were collected from 

52 wells and water from 70 wells was analyzed for chloride 

concentration during June 2005. Geophysical logs were 

obtained from Jekyll Tower well (34G003) to assess whether 

the cause of elevated chloride concentration could be due to 

leaky well casing.

Related Studies

The GaEPD Georgia Coastal Sound Science Initiative 

(CSSI) is a program of scientific and feasibility studies to 

support development of a final strategy to protect the Upper 

Floridan aquifer from saltwater contamination. In support of 

the GaEPD CSSI CWP, the USGS is working on a comprehensive program to evaluate ground-water conditions in the 

coastal area of Georgia and adjacent parts of South Carolina 

and Florida. Other participants in the program include other 

Federal and State agencies, academic institutions, and private 

consulting firms. Many of the activities of the GaEPD CSSI 

CWP directly benefit the Brunswick–Glynn County CWP.

Progress and Significant Technical 

Findings during Fiscal Year 2006

Progress and significant technical findings of the 

cooperative water-resources program during the State 

FY 2006 (July 1, 2005–June 30, 2006) are summarized 

below. Ground-water levels and chloride concentrations in the 

Brunswick–Glynn County area have been monitored for 

several decades as part of the Brunswick–Glynn County 

CWP. These data are used to guide water-management 

decisions by State and local authorities.

Ground-Water-Level and Chloride Monitoring

During FY 2006, ground-water levels in the Brunswick–

Glynn County area were continuously monitored in 28 wells; 

the Brunswick–Glynn County CWP funded 12, and 

GaEPD– CSSI CWP funded 16 as part of its Statewide network (fig. 1, table 1). Of the 12 continuous water-level recorders funded through the Brunswick–Glynn County CWP, four 

are completed in the Upper Floridan aquifer, four in the Lower 

Floridan aquifer, three in the Brunswick aquifer system, and 

one in the surficial aquifer system. During 2006, a recently 

abandoned production well at Jekyll Island and a new test well 

at Lawrence Road, St. Simons Island, were incorporated into 

the GaEPD – CSSI CWP statewide monitoring network. The 

well at Jekyll Island (33G033) will provide information on 

water-level changes in the Upper Floridan aquifer on the barrier island in the southern part of the county, and the well on 

St. Simons Island (35H077) will provide water-level monitoring in the lower Brunswick aquifer (fig. 1, table 1). In addition 

to continuous recorders, synoptic water-level measurements 

were collected in 28 wells completed in the Upper Floridan 

aquifer during June 2005 and a potentiometric-surface map 

was prepared using the data. 

The high chloride plume and saltwater intrusion were 

monitored via sampling during June 2005 and analysis of 

dissolved chloride in water from 70 wells. The chloride 

plume at Brunswick during June 2005 was mapped and is 

included herein. Summaries of ground-water conditions in the 

Brunswick–Glynn County area are provided in the reports, 

“Water resources data for Georgia, 2004,” by Peck and others 

(2005a), and “Ground-water conditions and studies in Georgia, 

2002–03,” by Leeth and others (2005). Description of waterlevels and chloride concentrations in the project area are provided in the sections, “Ground-Water Levels” and “GroundWater Quality of the Upper and Lower Floridan Aquifers.”

Geophysical Logging

Geophysical logging was of limited scope during 

FY 2006, largely because of a lack of new wells in the area. 

However, an existing 592-ft-deep well (34G003) located along 

State Highway 520 and State Highway 17 near the Jekyll 

Towers was logged during November 2005 to check for 

possible construction flaws as a possible explanation for the 

elevated chloride concentrations (see Appendix A for records 

of logs from this well).

   USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Reports and Technical Presentations

The USGS prepared several reports and technical presentations on coastal Georgia during FY 2006: The USGS has 

been attending Glynn County Water Resources Management 

Advisory Committee (WRMAC) meetings, keeping members 

posted on the Coastal Sound Science Initiative, presenting 

results from the most recent aquifer tests for the Brunswick 

and surficial aquifer systems and other hydrologically significant information (such as the impacts of the Durango Paper 

Company shutting down its paper mill).

Reports

USGS scientific investigations report (SIR) completed 

as part of the coastal Sound Science Initiative titled, 

“Simulation of saltwater movement in the Upper Floridan aquifer in the Savannah, Georgia–Hilton Head 

Island, South Carolina, area, Predevelopment–2004, 

and projected movement for 2000 pumping conditions,” by Alden M. Provost, Dorothy F. Payne, and 

Clifford I. Voss (http://pubs.usgs.gov/sir/2006/5058/)

USGS SIR completed as part of the CSSI titled, 

“Application of ground-water flow and solutetransport models to simulate selected ground-water 

management scenarios in coastal Georgia and adjacent 

parts of South Carolina and Florida, 2000–2100,” by 

Dorothy F. Payne, Alden M. Provost, Jaime A. Painter, 

Malek Abu Rumman, and Gregory S. Cherry

(http://pubs.usgs.gov/sir/2006/5077/)

USGS SIR completed as part of the CSSI titled, 

“Hydrogeology, water quality and saltwater intrusion 

in the Upper Floridan aquifer in the offshore area 

near Hilton Head Island, South Carolina, and Tybee 

Island, Georgia, 1999–2002,” by W. Fred Falls, 

Camille Ransom, James Landmeyer, Eric Reuber, and 

Lucy Edwards (http://pubs.usgs.gov/sir/2005/5134/)

USGS SIR completed as part of the CSSI titled, “Hydrogeology, water quality, and water-supply potential of the 

Lower Floridan aquifer, coastal Georgia, 1999–2002,” 

by W. Fred Falls, Larry Harrelson, Kevin Conlan, Matthew Petkewich (http://pubs.usgs.gov/sir/2005/5124/)

USGS open-file report completed for the U.S. Army 

at Fort Stewart titled, “Simulation of selected 

ground-water pumping scenarios at Fort Stewart and 

Hunter Army Airfield, Bryan, Liberty, Evans, and 

Chatham Counties, Georgia,” by Gregory S. Cherry

(http://pubs.usgs.gov/of/2006/1148/)

USGS fact sheet titled “Helping solve Georgia’s water 

problems—The USGS Cooperative Water Program” 

by John S. Clarke (http://pubs.usgs.gov/fs/2006/3032/), 

includes a feature on the Brunswick–Glynn County CWP.

•

•

•

•

•

•

USGS fact sheet titled “Georgia’s ground-water 

resources and monitoring network, 2006” 

(http://pubs.usgs.gov/fs/2006/3077/) describes 

the current ground-water monitoring network in 

Georgia and its importance

Technical Presentations

Presentation by John S. Clarke at the GaEPD, 

August 2–11, 2005, public meetings titled “Georgia 

Coastal Sound Science Initiative 2005–What have 

we learned?” (http://www.gadnr.org/cws/)

Presentation by Dorothy F. Payne at the Georgia 

Association of Water Professionals 2006 Spring 

Conference & Expo held in Callaway Gardens, 

Georgia, on April 4–5, 2006, titled “Saltwater 

intrusion in Coastal Georgia—What have we 

learned from the models?”

Poster presented by Jaime A. Painter at the USGS 

Geographic Information System workshop held in 

Denver titled “Chloride concentrations in the Upper 

Floridan aquifer, City of Brunswick, Glynn County, 

Georgia, 1957–2005.”

Coastal Sound Science Initiative

Coastal Sound Science Initiative activities, as part of the 

GaEPD–CSSI CWP during the past fiscal year, have involved 

completion of the project database and calibration of groundwater flow and solute transport models. The USGS has kept 

the Glynn County WRMAC informed of progress and results 

related to modeling, including the development of pumping scenarios to be evaluated by the calibrated models. The 

WRMAC has made recommendations to the technical advisory committee of the GaEPD–CSSI regarding appropriate 

scenarios for the Brunswick–Glynn County area. 

The GaEPD–CSSI has maintained a saltwater monitoring program near the Brunswick chloride plume at the well 

sites monitored by MACTEC Engineering and Consulting, 

Inc. The program consists of monitoring the upper and lower 

water-bearing zones in the Upper Floridan aquifer in the north 

Brunswick (wells 33H324 and 33H325) and south Brunswick 

(wells 34H504 and 34H505) areas (see figure 1 for locations). 

Each well is equipped with probes that continuously record 

specific conductance and water levels in an effort to correlate these parameters. The most recent report by MACTEC 

is reproduced as Appendix B. The MACTEC program 

ended during January 2006, and the USGS will take over the 

program as part of the GaEPD–CSSI CWP. The USGS will 

upgrade the specific conductance and water-level probes to 

enable monitoring on a real-time basis.

•

•

•

•

Progress and Significant Technical Findings during Fiscal Year 2006 
Figure 1. Location of study and continuous ground-water-level monitoring network in the Brunswick–Glynn County 

area, Georgia. [CWP, Cooperative Water Program; GaDNR/EPD, Georgia Department of Natural Resources, 

Environmental Division; CCSI, Coastal Sound Science Initiative]

95

341

17

82

33J065

35H077

33J062

34J077

34H436

34H437

34H438

34H515

34H125 

34H334

33J044

33G028

33H188

33H207

33H208

33H206

33H127

33H133

34H495

34H500

34J080

34J081

34J082

(was deleted

July 2005)

(Added to

GaEPD network

in fiscal year 2006)

34H504

34H505

33H325

33H324

34H492

34H391

34H371

34G033

WAYNE

BRANTLEY

GLYNN

St Simons

Island

Jekyll

Island

CAMDEN

MCINTOSH

Brunswick

Well in Brunswick–Glynn County CWP network for fiscal year 2006

Climatic monitoring site, Coastal Georgia Community College

EXPLANATION

34G033

34J077

Atlantic

Ocean

Base modified from U.S. Geological Survey 

1:100,000-scale digital data

Well in GaDNR/EPD–CCSI–CWP network for fiscal year 2006

N

0 5 10 MILES

0 5 10 KILOMETERS

GEORGIA

Glynn

County

 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Table 1. Brunswick–Glynn County, Georgia, monitoring network, fiscal year 2006.

[do., ditto]

Well 

identification Description Aquifer or system Subunit

33G028 GPA-3 Lower Brunswick None

33H127 U.S. Geological Survey test well 3 Upper Floridan Lower water-bearing zone

33H133 U.S. Geological Survey test well 6 do. Upper water-bearing zone

33H188 U.S. Geological Survey test well 26 Lower Floridan Fernandina permeable zone

33J044 U.S. Geological Survey test well 27 do. Undifferentiated

34H334 U.S. Geological Survey test well 4 Upper Floridan Lower water-bearing zone

34H371 U.S. Geological Survey test well 11 do. Upper water-bearing zone

34H391 U.S. Geological Survey test well 16 Lower Floridan Brackish water zone

34H436 Coffin Park test well 1 do. do.

34H437 Coffin Park test well 2 Upper Brunswick None

34H438 Coffin Park test well 3 Surficial aquifer system Deeper (confined) zone

*34H515 Coffin Park surficial replacement well do. do.

34J077 Golden Isle test well 1S Upper Brunswick None

Additional Wells (funded by Georgia Environmental Protection Division)

33H206 Georgia Pacific S test well 1 Lower Floridan Brackish water zone

33H207 Georgia Pacific S test well 2 Upper Floridan Upper water-bearing zone

33H208 Georgia Pacific S test well 3 Surficial aquifer system Deeper (confined) zone

**33H324 Georgia Pacific UWBZ Upper Floridan Upper water-bearing zone

**33H325 Georgia Pacific LWBZ do. Lower water-bearing zone

33J062 Georgia Forestry Commission GB-1 Lower Brunswick None

33J065 Georgia Forestry Commission GB-4 Upper Brunswick None

34G033 Jekyll No. 9 Upper Floridan None

34H492 Coastal Georgia Community College P-17 Surficial aquifer system Water-table zone

34H495 Georgia Ports Authority Fernandina test well Lower Floridan Fernandina permeable zone

34H500 Georgia Ports Authority Lower Floridan test well do. Fresh water-bearing zone

**34H504 Southside Baptist Church UWBZ Upper Floridan Upper water-bearing zone

 **34H505 Southside Baptist Church LWBZ do. Lower water-bearing zone

34J080 Ebenezer Bend AR-2 Lower Brunswick None

34J081 Ebenezer Bend AR-3 Upper Brunswick None

34J082 Ebenezer Bend AR-4 Surficial aquifer system None

35H077 St. Simons Lower Brunswick 2 Lower Brunswick None

 *Replaces 34H438

**See MACTEC report (Appendix B)

Progress and Significant Technical Findings during Fiscal Year 2006   
Hydrologic Conditions

Ground-water levels and chloride concentrations in the 

Brunswick–Glynn County area have been monitored for 

several decades as part of the Brunswick–Glynn County CWP. 

These data are used to guide water-management decisions by 

State and local authorities.

Precipitation

A real time climatic site was established as part of the 

GaEPD–CSSI CWP at the Coastal Georgia Community College campus at Brunswick. Daily value graphs for this site are 

accessible on the Brunswick–Glynn County CWP project Web 

page at http://ga.water.usgs.gov/projects/brunswick/. 

Precipitation data and cumulative departure from normal 

from 1999–2006 are shown in figure 2. The cumulative departure from normal precipitation for the period of record can be 

used to evaluate trends in precipitation, which typically relate 

to recharge of the water-table aquifer. Cumulative departure 

describes the long-term surplus or deficit of precipitation 

during a designated period and is derived by adding successive values of departures from normal precipitation. In this 

report, normal precipitation for a given day is defined as the 

average of total daily precipitation during the period of record 

(1999–2006).

Cumulative departure data show a below-normal rainfall 

from 1999 to mid-2002, corresponding to a drought period that 

generally is accepted to have begun during 1998. Since early 

2004, precipitation has been largely above normal (fig. 2).

Ground-Water Pumpage

During 2005, about 50 million gallons per day (Mgal/d) 

were withdrawn from the Upper Floridan aquifer in Glynn 

County, of which 8.9 Mgal/d was for public supply and 

41.1 Mgal/d was for industry (Julia L. Fanning, U.S. Geological Survey, written commun., 2006). According to Payne and 

others (2005), pumpage from the Upper Floridan aquifer in 

Glynn County decreased from 95.4 Mgal/d during 1980 to 

61.1 Mgal/d during 2000, reflecting increased water conservation by local industry. During 2000–2005, pumpage from the 

Upper Floridan aquifer at the Georgia–Pacific Cellulose plant 

decreased by nearly 4 Mgal/d, while pumpage at the Hercules–

Pinova plant remained at about 8 Mgal/d and for public supply 

(City of Brunswick, Sea Island, St. Simons Island, and Jekyll 

Island) remained at about 9 Mgal/d (fig. 3). During 1980–2005, 

water use by local industries (Georgia–Pacific Cellulose, and 

Hercules–Pinova) decreased by nearly half, from 78.3 Mgal/d 

during 1980 to 41.1 Mgal/d during 2005 (Julie L. Fanning, 

U.S. Geological Survey, written commun., 2006). The reduction in pumpage had a pronounced affect on ground-water 

levels in the area.

Ground-Water Levels

During 2005, water levels in the surficial aquifer system were above normal in the two of three wells monitored 

in Brunswick–Glynn County, reflecting continued recovery 

from the 1998–2002 drought (fig. 4). A similar recovery was 

observed in the Brunswick aquifer system, with water levels 

at or above normal in the five wells monitored (fig. 5). In 

well 34J077 at the Golden Isles development, the water level 

was in the normal range, reflecting the possible influence of 

pumping in that area. Since pumping from the Brunswick 

aquifer system at the Golden Isles production well began 

during 1999, the water level has dropped about 12 feet (see 

hydrograph for well 34J077, Appendix C).

Water levels in the Upper Floridan aquifer were above 

normal during 2005 in the five of six wells monitored at 

Brunswick (fig. 6), reflecting the continued coastalwide recovery from the 1998–2002 drought. In the Lower Floridan aquifer, water levels in four of six wells in the Brunswick–Glynn 

County area also were above normal during 2005, reflecting 

continued recovery from the 1998–2002 drought (fig. 7). The 

other two wells had water levels within the normal range for 

the period of record.

The Durango Paper Company, which was shutdown 

during 2002, probably contributed in part to the elevated 

water levels observed in the Floridan aquifer system in Glynn 

County. The paper mill is located in the St. Marys area, about 

30 miles south of Brunswick, and while in operation pumped 

35.5 Mgal/d from the Upper Floridan aquifer. Following closure of the Durango Paper Company during 2002, water levels 

at the center of the cone of depression at St. Marys had risen 

200 ft, and in outlying areas of Camden County rose from 4 to 

10 ft (Peck and others, 2005).

Chloride and Sulfate Concentration

Water supply in the Brunswick, Georgia, area primarily is 

obtained from wells completed in the Upper Floridan aquifer. 

Pumping has reduced pressure in the aquifer and resulted in 

saltwater intrusion locally at Brunswick. The current chloride 

monitoring network is shown in figure 8 and listed in 

table 2. Chloride concentrations have been monitored in the 

Brunswick area since the late 1950s, when saltwater was first 

detected in the southernmost part of Brunswick (Wait, 1965). 

Saltwater has migrated upward from deep saline zones through 

breaches in confining units as a result of reduced pressure in the 

aquifer. By the 1960s, a plume had migrated northward toward 

two major industrial pumping centers. During June 2005, chloride concentration in water from the Upper Floridan aquifer was 

above the 250-mg/L State and Federal secondary drinking-water 

standard (Georgia Environmental Protection Division, 1997; 

U.S. Environmental Protection Agency, 2000) in a 2-mi2

 area, 

and exceeds 2,250 mg/L in part of the plume area (fig. 8). 

   USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Upper Floridan aquifer

Graphs of chloride concentration in water samples from 

wells in the upper and lower water-bearing zones of the Upper 

Floridan aquifer are shown for the south Brunswick area 

(graphs for wells 34H393 and 34H403, fig. 9) and north Brunswick area (graphs for wells 33H127 and 33H133, fig. 10). 

Chloride concentration in water from the Lower Floridan 

aquifer is shown for well 34H391 in the south Brunswick area 

(fig. 9). More information on the Brunswick area monitoring 

can be accessed at http://ga.water.usgs.gov/projects/brunswick/. 

Maps showing the concentration of dissolved chloride 

in the Upper Floridan aquifer at Brunswick were prepared for 

June 2004 and June 2005. The June 2005 map is similar to the 

previously published map for 2003 (Leeth and others, 2005) 

and shows that areas of highest concentration are near the two 

industrial pumping centers in the northern part of the city, as 

well as the original area of contamination in the southern part 

of the city. The decreases in chloride concentration observed 

between 2003 and 2004 were temporary because the values 

during 2005 closely approximated those of 2003 (table 2).

During 2004–2005, chloride concentration within the 

plume area generally increased in the western and southern part 

of the contaminated area, and decreased in the eastern part 

(toward Hercules–Pinova plant; fig. 11). In the south Brunswick area, the greatest increase was 180 mg/L at well 34H403 

(figs. 8B, 9, and 11; table 2). In the northwestern part of the 

Brunswick area, chloride concentrations also generally 

increased, with a maximum increase of 230 mg/L in well 33H130 

(figs. 8B and 11, table 2). Chloride-concentration trends in 

the north Brunswick area are illustrated in the graphs shown 

in figure 10. In the central Brunswick area, chloride concentrations generally rose, with increases ranging from 10 to 

490 mg/L (fig. 11). Well 34H401, which showed a decrease in 

chloride concentration of 410 mg/L during the previous year 

(2003–2004), had the largest increase of 490 mg/L (figs. 8B

and 11; table 2). In parts of the area, concentrations in wells 

located next to each other varied significantly—for example, 

in the northeastern plume area, concentrations in well 33H221 

decreased by 296 mg/L, whereas concentrations in well 

33H227, located about 700 ft southwest of the well increased 

by 122 mg/L (figs. 8B and 12, table 2). The reason for this variation is unknown; however, previous investigators have reported 

the presence of fractures and solution openings in the Brunswick area that could produce highly variable flow conditions in 

the area (Maslia and Prowell, 1990; Jones and others, 2002).

Outside the plume area, chloride concentrations are 

below the 250 mg/L drinking-water standard. However, in 

local areas, chloride concentrations exceed 50 mg/L, which 

is considered to be above background levels. This includes 

wells 33H227, 34G002, 34G003, 34H075, and 34H398 (see 

locations, fig. 8A,B). The reason for elevated chloride concentrations in these wells remains unclear, but could be related 

to failed or improper well casing seal (Hall and Peck, 2005). 

During FY 2006, borehole geophysical and TV-camera data 

were collected from well 34G003 to assess well construction 

(see geophysical logs, Appendix A). Results of this effort were 

inconclusive; there were no apparent flaws in the well construction, so the source of the saltwater remains unclear.

The Perry Park well (34H368) is also outside the plume 

area, with chloride concentrations that fluctuate in response 

to pumping changes. This City of Brunswick production well 

is currently (2006) out of service and is planned for incorporation into the Brunswick–Glynn County CWP monitoring 

network during FY 2007. This well is a valuable and important 

site for continuous water-level and specific-conductance monitoring because this is the only known area where the chloride 

plume appears to fluctuate in horizontal position.

Surficial and Brunswick Aquifer Systems

Historically, water-quality data-collection efforts in the 

Glynn County area have focused on the Floridan aquifer 

system. However, Clarke and others (1990) recognized that 

locally, water-quality problems do exist in the surficial and 

Brunswick aquifer systems, and that these problems typically 

can be associated with (1) saltwater encroachment in shallow 

wells near the coast, tidal rivers, and estuaries; (2) upward 

leakage of water from underlying aquifers through semiconfining units or fractures as a result of natural or pumping-induced 

head gradients; or (3) failed well casing. Localized saltwater 

contamination has been recognized in a number of areas along 

the coast, including Vernonburg in Chatham County (Hall and 

Peck, 2005) and Sea Island (Julie Vann, Georgia Environmental Protection Division, written commun., July 2005).

Data suggest that the water quality of these shallower 

aquifer systems can be maintained with careful management. 

Figure 12 presents chloride concentration data from three wells 

completed in the semiconfined portion of the surficial aquifer 

and one well completed in the lower Brunswick aquifer. Well 

34H428 (fig. 12) represents freshwater in the surficial aquifer 

system, with chloride concentrations below 14 mg/L, varying 

less than 2 mg/L. On the other hand, well 34H438 is completed 

in the surficial aquifer system and recently has been impacted 

by saltwater. In the past, it was surmised that the increase in 

chloride concentration was the result of poor well construction. 

However, recently conducted borehole geophysical and television surveys indicated no apparent well construction problems, 

and a replacement well (34H515) drilled during December 2004 

had specific conductance values consistent with high chloride 

concentrations. These data suggest that the high concentrations 

are unlikely to be associated with well construction flaws.

Wells 34H446 and 34H448 are a well “cluster,” with the 

former completed in the Brunswick aquifer system and the 

latter in the surficial aquifer. These wells also represent the 

result of careful use of best management practices. Because of 

an increase in chloride concentration in the Brunswick aquifer 

system well, a replacement well into the confined surficial 

aquifer was completed during May 1989. This resulted in a 

decrease in chloride concentration of more than 2,000 mg/L 

in well 34H446—likely because the head gradient that was 

causing saltwater leakage or encroachment was reduced or 

eliminated after pumping from the well ceased.

Hydrologic Conditions 
References Cited

Cherry, G.S., 2006, Simulation of selected ground-water 

pumping scenarios at Fort Stewart and Hunter Army 

Airfield, Georgia: U.S. Geological Survey Open-File 

Report 2006–1148, 16 p., accessed July 25, 2006, at 

http://pubs.usgs.gov/of/2006/1148/.

Clarke, J.S., 2006, Helping solve Georgia’s water problems—

The USGS Cooperative Water Program: U.S. Geological 

Survey Fact Sheet 2006–3032, 4 p., accessed September 25, 

2006, at http://pubs.usgs.gov/fs/2006/3032/.

Clarke, J.S., Hacke, C.M., and Peck, M.F., 1990, Geology 

and ground-water resources of the coastal area of Georgia: 

Georgia Geologic Survey Bulletin 113, 106 p.

Falls, W.F., Ransom, Camille, Landmeyer, J.E., Reuber, E.J., 

and Edwards, L.E., 2005, Hydrogeology, water quality, 

and saltwater intrusion in the Upper Floridan aquifer in the 

offshore area near Hilton Head Island, South Carolina, and 

Tybee Island, Georgia, 1999–2002: U.S. Geological Survey 

Scientific Investigations Report 2005–5134, 48 p., accessed 

April 30, 2006, at http://pubs.usgs.gov/sir/2005/5134/.

Falls, W.F., Harrelson, L.G., Conlon, K.J., and Petkewich, M.D., 

2005, Hydrogeology, water quality, and water-supply 

potential of the Lower Floridan aquifer, coastal Georgia, 

1999–2002: U.S. Geological Survey Scientific Investigations Report 2005–5124, 89 p., 1 pl., accessed April 30, 

2006, at http://pubs.usgs.gov/sir/2005/5124/.

Georgia Environmental Protection Division, 1997, Secondary 

maximum contaminant levels for drinking water: Environmental Rule 391-3-5-19, revised October 1997: Official 

Code of Georgia Annotated Statutes, Statute 12-5-170 

(Georgia Safe Drinking Water Act), variously paginated.

Hall, M.E., and Peck, M.F., 2005, Saltwater contamination 

due to well construction problems—A case study from 

Vernonburg, Georgia, in Proceedings of the 2005 Georgia 

Water Resources Conference, held April 25–27, 2005, at 

The University of Georgia, Athens, Georgia, K.J. Hatcher, 

ed., Institute of Ecology, The University of Georgia, Athens, 

Georgia, accessed November 10, 2005, at http://ga.water.

usgs.gov/pubs/other/gwrc2005/pdf/GWRC05_Hall_Peck.pdf

Jones, L.E., Prowell, D.C., and Maslia, M.L., 2002, Hydrogeology and water quality (1978) of the Floridan aquifer 

system at U.S. Geological Survey TW-26, on Colonels 

Island, near Brunswick, Georgia: U.S. Geological Survey 

Water-Resources Investigations Report 02-4020, 44 p., 

accessed July 25, 2005, at http://pubs.usgs.gov/wri/2002/

wri02-4020/.

Leeth, D.C., Clarke, J.S., Wipperfurth, C.J., and Craigg, S.D., 

2005, Ground-water conditions and studies in Georgia, 

2002–03: U.S. Geological Survey Scientific Investigations 

Report 2005-5065, 128 p., accessed April 30, 2005, at 

http://pubs.usgs.gov/sir/2005/5065/.

Maslia, M.L., and Prowell, D.C., 1990, Effect of faults on 

fluid flow and chloride contamination in a carbonate aquifer 

system: Journal of Hydrology, no. 115, p. 1–49.

Payne, D.F, Provost, A.M., Painter, J.A., Abu Rumman, Malek, 

and Cherry, G.S., 2006, Application of ground-water flow and 

solute-transport models to simulate selected ground-water 

man­agement scenarios in coastal Georgia and adjacent parts of 

South Carolina and Florida, 2000–2100: U.S. Geological Survey, Scientific Investigations Report 2005-5077, 86 p., accessed 

on April 30, 2006, at http://pubs.usgs.gov/sir/2006/5077/.

Payne, D.F., Abu Rumman, Malek, and Clarke, J.S., 2005, 

Simulation of ground-water flow in coastal Georgia and 

adjacent parts of South Carolina and Florida––Predevelopment, 1980, and 2000: U.S. Geological Survey, Scientific 

Investigations Report 2005-5089, 91 p., accessed January 18, 2006, at http://pubs.usgs.gov/sir/2005/5089/.

Peck, M.F., Cressler. A.M., and Painter, J.A., 2005a, Continuous ground-water-level data and periodic ground-waterquality data, Calendar Year 2004, v. 2, in McCallum, B.E., 

and Alhadeff, D.V. (compilers), Water resources data—

Georgia, 2004: U.S. Geological Survey Water-Data 

Report GA-04-02, 241 p., accessed April 30, 2006, at 

http://pubs.usgs.gov/wdr/wdr-ga-04-2/.

Peck, M.F., McFadden, K.W., and Leeth, D.C., 2005b, Effects 

of decreased ground-water withdrawal on ground-water levels and chloride concentrations in Camden County, Georgia, 

and ground-water levels in Nassau County, Florida, from 

September 2001 to May 2003: U.S. Geological Survey 

Scientific Investigations Report 2004-5295, 36 p., accessed 

January 18, 2006, at http://pubs.usgs.gov/sir/2004/5295/.

Peck, M.F., McFadden, K.W., and Leeth, D.C., 2005c, Impact of 

a major industrial shutdown on groundwater flow and quality 

in the St. Marys area, southeastern Georgia and northeastern 

Florida, in Proceedings of the 2005 Georgia Water Resources 

Conference, held April 25–27, 2005, at The University of Georgia, 

Athens, Georgia, K.J. Hatcher, ed., Institute of Ecology, The University of Georgia, Athens, Georgia, accessed August 16, 2006, at 

http://ga.water.usgs.gov/pubs/other/gwrc2005/pdf/GWRC05_Peck.pdf .

Provost, A.M., Payne, D.F., and Vost, C.I., 2006, Simulation of 

saltwater movement in the Upper Floridan aquifer in the 

Savannah, Georgia–Hilton Head Island, South Carolina, 

area, predevelopment–2004, and projected movement for 

2000 pumping conditions: U.S. Geological Survey Scientific Investigations Report 2006–5058, 132 p., accessed 

April 30, 2006, at http://pubs.usgs.gov/sir/2006/5058/.

U.S. Environmental Protection Agency, 2000 revised, Maximum contaminant levels (Part 143, National Secondary 

Drinking-water Regulations): U.S. Code of Federal Regulations, Title 40, parts 100–149. 

Wait, R.L., 1965, Geology and occurrence of fresh and brackish ground water in Glynn County, Georgia: U.S. Geological Survey Water-Supply Paper 1613-E, 94 p.

 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Table 2 and Figures 2–12

Table 2 and Figures 2–12 
Table 2. Chloride and sulfate concentrations of water samples collected during June 2003, 2004, and 2005 and specific conductance of 

water samples collected during June 2005.—Continued

[Well locations shown in figure 8A,B; mg/L, milligrams per liter; specific conductance at 25 degrees Celsius; —, no data]

Well

identification

Aquifer 

or 

system

June 2003 June 2004 June 2005 June 2005

Chloride Sulfate Chloride Sulfate Chloride Sulfate Specific conductance

mg/L mg/L mg/L Field Lab

33G001 Lower Floridan aquifer 34.9 119.0 32.7 125.0 33.2 137.0 613 614

33G002 Upper Floridan aquifer — — 70.5 130 72.8 137 730 731

33G003 Floridan aquifer system — — 68.1 0.9 27.4 99.0 527 528

33G008 Upper Floridan aquifer — — 24.1 97 23.7 98.0 518 518

33G024 Upper Floridan aquifer 18.6 90 16.8 96 14.7 95.2 485 485

33G028 Brunswick aquifer system — — 14.0 0.5 12.4 2.1 192 193

34G002 Upper Floridan aquifer 37.1 100 79.1 124 77.3 128 731 726

34G003 Upper Floridan aquifer 136 150 150 154 153 176 1,013 1,011

34G005 Upper Floridan aquifer — — — — 22.9 97.9 — —

34G036 Lower Floridan aquifer 305 89.1 438 199 453 323 2,160 2,136

32H001 Upper Floridan aquifer 30.2 83.2 25.3 80.3 24.8 80.3 488 481

33H113 Upper Floridan aquifer — — 381 197 — — — —

33H120 Upper Floridan aquifer 23.0 89.3 19.3 89.1 17.5 85.3 462 461

33H127 Floridan aquifer system 879 346 907 389 906 353 3,330 3,284

33H130 Upper Floridan aquifer 3,010 851 2,460 730 2,690 780 8,790 8,670

33H133 Upper Floridan aquifer 2,050 631 1,950 629 2,160 670 7,280 7,180

33H154 Floridan aquifer system 1,970 541 2,060 590 2,210 571 7,440 7,380

33H177 Upper Floridan aquifer 28.7 121 24.2 122 22.4 126 558 560

33H183 Upper Floridan aquifer 25.4 104 23.7 106 31.1 110 560 557

33H188 Lower Floridan aquifer — — 8,170 2,920 10,285 3,120 30,100 38,520

33H190 Upper Floridan aquifer 25.2 84.6 20.8 83.8 19.1 80.8 465 465

33H206 Lower Floridan aquifer 357 253 404 197 416 257 1,834 1,805

33H207 Upper Floridan aquifer 21.0 85.9 15.5 100 15.9 82.7 409 408

33H211 Upper Floridan aquifer 15.6 83.6 14.2 84.1 16.1 80.4 450 447

33H212 Floridan aquifer system 1,210 540 1,130 516 1,160 488 4,490 4,450

33H213 Upper Floridan aquifer 58.1 125 48.4 120 35.0 112 613 606

33H221 Upper Floridan aquifer 1,180 411 1,130 430 834 375 4,350 3,400

33H222 Upper Floridan aquifer 595 249 303 162 626 277 2,560 2,544

33H227 Upper Floridan aquifer 35.8 108 125 125 247 173 1,260 1,267

34H012 Upper Floridan aquifer — — 26 98 — — — —

34H075 Floridan aquifer system 29.0 92.1 42.8 93.9 51.3 97.9 593 590

34H078 Floridan aquifer system 222 125 334 154 — — — —

34H095 Upper Floridan aquifer — — 26 90 27.1 81.2 485 490

34H112 Upper Floridan aquifer 1,660 472 1,580 501 1,620 464 5,550 5,520

34H117 Upper Floridan aquifer 527 206 497 175 499 222 2,170 2,159

34H125 Upper Floridan aquifer 605.0 280.0 496.0 188.0 479.0 256.0 2,180 2,171

10 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Table 2. Chloride and sulfate concentrations of water samples collected during June 2003, 2004, and 2005 and specific conductance of 

water samples collected during June 2005.—Continued

[Well locations shown in figure 8A,B; mg/L, milligrams per liter; specific conductance at 25 degrees Celsius; —, no data]

Well

identification

Aquifer 

or 

system

June 2003 June 2004 June 2005 June 2005

Chloride Sulfate Chloride Sulfate Chloride Sulfate Specific conductance

mg/L mg/L mg/L Field Lab

34H128 Upper Floridan aquifer 727 341 682 349 706 349 2,920 2,906

34H134 Floridan aquifer system 46.7 88.0 38.9 86.7 45.3 86.9 552 550

34H334 Upper Floridan aquifer 1,120 269 1,080 288 1,070 347 3,900 3,862

34H344 Upper Floridan aquifer 26.9 86.5 25.7 86.1 18.6 84.8 460 459

34H354 Floridan aquifer system 1,360 502 1,360 513 1,330 460 4,870 4,900

34H355 Upper Floridan aquifer 237 129 313 147 321 168 1,510 1,504

34H371 Upper Floridan aquifer 17.0 91.8 14.5 91.8 12.7 90.0 447 449

34H373 Upper Floridan aquifer 381 217 402 185 387 239 1,810 1,815

34H374 Upper Floridan aquifer 959 339 985 382 1,040 387 3,910 3,874

34H391 Lower Floridan aquifer 3,030 717 2,340 621 2,470 608 8,160 8,090

34H393 Upper Floridan aquifer 2,130 585 1,820 536 1,980 518 6,560 6,520

34H398 Floridan aquifer system 126 169 135 163 140 197 1,008 1,007

34H399 Lower Floridan aquifer 6,590 1,290 5,910 1,410 6,440 1,450 18,280 21,640

34H400 Upper Floridan aquifer 425 190 412 170 422 210 1,880 1,882

34H401 Upper Floridan aquifer 2,200 703 1,790 609 2,280 750 6,580 6,530

34H402 Floridan aquifer system 2,740 851 2,020 669 2,210 702 7,470 7,370

34H403 Floridan aquifer system 1,310 244 1,240 395 1,420 399 4,790 4,790

34H413 Upper Floridan aquifer 623 254 587 256 471 244 2,110 2,099

34H426 Lower Floridan aquifer — — 854 315 881 327 3,430 3,432

34H427 Upper Floridan aquifer 1,470 497 1,520 520 1,520 465 5,510 5,190

34H428 Surficial aquifer system 13.9 81.8 12.8 77.8 11.3 82.7 480 483

34H434 Upper Floridan aquifer 2,040 679 1,740 616 1,840 583 6,330 6,320

34H436 Lower Floridan aquifer 22.9 103 20.2 105 18.9 104 495 493

34H438 Surficial aquifer system 2,870 285 2,540 304 — — — —

34H445 Upper Floridan aquifer 17.6 87.8 16.4 87.7 15.9 85.9 452 449

34H446 Lower Brunswick aquifer 285 189 285 170 297 208 1,470 1,486

34H448 Surficial aquifer system 20.7 85.5 18.3 87.0 15.3 87.4 520 520

34H449 Upper Floridan aquifer 31.0 94.7 24.9 95.3 24.0 94.7 499 499

34H450 Upper Floridan aquifer 21.7 85.6 17.9 84.5 15.3 81.9 448 442

34H469 Upper Floridan aquifer 1,350 174 1,140 450 — 117 4,090 4,070

34H507 Upper Floridan aquifer — — — — 24.9 96.9 — —

34H514 Upper Floridan aquifer — — 242 118 — — 1,190 1,400

34H515 Surficial aquifer system — — — — 5,370 665 — —

Table 2 and Figures 2–12  11
Figure 2. (A) Cumulative departure from normal precipitation and (B) total daily precipitation at 

Coastal Georgia Community College, Georgia, 1999–2006 (see figure 1 for location).

1999 2000

B.

A.

2001 2002 2003 2004 2005 2006

7

6

5

4

3

2

1

0

15

10

5

0

–5

–10

–15

–20

–25

–30

–35

PRECIPITATION, IN INCHES CUMULATIVE DEPARTURE FROM NORMAL PRECIPITATION, IN INCHES

12 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Figure 3. Major ground-water pumpage from the Upper Floridan aquifer in the Brunswick–Glynn County 

area, Georgia, 1980–2005.

19801981

1982

1983

1984

1985

1986

1987

1988

1989

1990

1991

1992

1993

1994

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

20

30

0

10

40

60

50

PUMPAGE, IN MILLION GALLONS PER DAY

Paper mill

Chemical plant

Major public suppliers (Sea Island,

 St. Simons Island, Jekyll Island,

 and City of Brunswick) for

 Glynn County

Table 2 and Figures 2–12  13
Figure 4. Ground-water levels in the surficial aquifer system in coastal Georgia, 2005.

GEORGIA

Atlantic

Ocean

Site name County

33D072

32R003

Camden

Bulloch

35P094 Chatham

37P116 Chatham

38Q208 Chatham

38Q209 Chatham

39Q029 Chatham

Chatham

33H208 Glynn

34H438 Glynn

34H492 Glynn

32L017 Wayne

39Q025

Fort Pulaski, Savannah Harbor Expansion, monitoring well 3, COE

Tybee, Savannah Harbor Expansion, monitoring well 1, COE

Fort Pulaski, Savannah Harbor Expansion, monitoring well 4, 

 U.S. Army Corps of Engineers (COE)

Georgia Department of Natural Resources, 

 Environmental Protection Division, St Marys, test well 3

Georgia Department of Natural Resources, 

 Environmental Protection Division, Coffin Park, test well 3

Georgia Department of Natural Resources, 

 Environmental Protection Division, Gardi, test well 3

Georgia Department of Natural Resources, 

 Environmental Protection Division, Tybee Island, test well 2

Georgia-Pacific, south, test well 3

Coastal Georgia Community College P-17

Bulloch South test well 2

University of Georgia, Bamboo Farm well 

Georgia Department of Natural Resources, 

 Environmental Protection Division, Skidaway Institute, test well 4

Surficial aquifer system

Other identifier

Base from U.S. Geological Survey

1:100,000-scale digital data

20 MILES

0 10 20 KILOMETERS

0 10

EXPLANATION

Above normal—Above 75th percentile

 water level for period of record

Normal—Between 25th and 75th

 percentile water level for 

 period of record

Observation well, site name, and 

 comparison of monthly mean water 

 level during 2005 to period-of-record

 water level

N

No data

Map

area

( )

( )

( )

( ) 35P094

37P116

32R003

33H208

34H438

34H492

33D072

32L017

32L017

39Q025

38Q209

38Q208

39Q029

33H208

EFFINGHAM

EVANS

BRYAN

BULLOCH

CHATHAM

LIBERTY

APPLING LONG

TOOMBS

TATTNALL

WAYNE

GLYNN

BRANTLEY

MCINTOSH

PIERCE

WARE

BACON

CHARLTON CAMDEN

CANDLER

14  USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Figure 5. Ground-water levels in the Brunswick aquifer system in coastal Georgia, 2005.

GEORGIA

Base from U.S. Geological Survey

1:100,000-scale digital data

Atlantic

Ocean

20 MILES

0 10 20 KILOMETERS

0 10

EXPLANATION

Approximate extent of Brunswick

 aquifer system

Above normal—Above 75th percentile

 water level for period of record

Below normal—Below 25th percentile

 water level for period of record

Normal—Between 25th and 75th

 percentile water level for 

 period of record

Observation well, site name, and 

 comparison of monthly mean water 

 level during 2005 to period-of-record

 water level

Site name Water-bearing

unit1 County

36N012 L

31U009 UX Bulloch Georgia Department of Natural Resources, 

 Environmental Protection Division, Hopeulikit, test well 2

Georgia Department of Natural Resources, 

 Environmental Protection Division, Coffin Park, test well 2

Georgia Department of Natural Resources, 

 Environmental Protection Division, Gardi, test well 2

Georgia Department of Natural Resources, 

 Environmental Protection Division, St Simons lower Brunswick 2

Georgia Department of Natural Resources, 

 Environmental Protection Division, St Marys, test well 2

Bryan Genesis Point

Georgia Forestry Commission, test well CB-1

Georgia Forestry Commission, test well GB-1

Georgia Forestry Commission, test well GB-4

33D071 U Camden

35Q050 B Chatham

39Q026 UX Chatham Tybee Island, test well 3

Golden Isle, test well 1S

39Q028 UX Chatham Tybee, Savannah Harbor Expansion, monitoring well 2, 

 U.S. Army Corps of Engineers (COE)

34S008 LX Effingham Pineora test well EB-1

35S008 LX Effingham Effingham County, Georgia Geologic Survey, corehole

35T005 UX Effingham Springfield, Georgia, Miocene well

33G028 B Glynn Georgia Ports Authority, well 3

33J062 L Glynn

33J065 U Glynn

34H437 U Glynn

34J077 U Glynn

35H077 L Glynn

32L016 U Wayne

N

No data

Map

area

Other identifier

1

B, Brunswick aquifer system; L, lower Brunswick aquifer; U, upper Brunswick aquifer; UX, undifferentiated, low-permeability 

 equivalent to the upper Brunswick aquifer; LX, undifferentiated, low-permeability equivalent to the lower Brunswick aquifer

34J077

35H077

36N012

31U009

31U009

35T005

34S008

35S008

39Q026

39Q026

35Q050

39Q028

39Q028

33D071

33J062

33J065

34H437

32L016

33G028

EFFINGHAM

EVANS

BRYAN

BULLOCH

CHATHAM

LIBERTY

APPLING LONG

TOOMBS

TATTNALL

WAYNE

GLYNN

BRANTLEY

MCINTOSH

PIERCE

WARE

BACON

CHARLTON CAMDEN

CANDLER

Table 2 and Figures 2–12  15
Figure 6. Ground-water levels in the Upper Floridan aquifer in the Brunswick area, Georgia, 2004–2005.

Oglethorpe Bay

Stonewall St

TURTLE

RIVER

Newcastle St

East River

East River

Oglethorpe Bay

Stonewall St

Norwich St

TURTLE

RIVER

Newcastle St

East River

Stonewall St

Norwich St

4th St

4th St

4th St

TURTLE

RIVER

ANDREWS

ISLAND

ANDREWS

ISLAND

ANDREWS

ISLAND Oglethorpe Bay

Newcastle St

Norwich St

34H334

34H125

33H207

34H371

33H127

33H133

33H207

l l l l

l l

l l l l l l l l l l l l l l l l

20

15

10

5

0

5

5

5

0

10

15

20

25

10

June 2004 June 2005

Area of 

enlarged

map

GEORGIA

Above normal—Above 75th percentile water level

 for period of record

Upper Floridan aquifer

City of Brunswick area

Observation well, site name, and comparison of

 mean annual water level during 2005

 to period-of-record water level

 EXPLANATION

Site name County Other identifier

33H127 Glynn

Glynn

Glynn

Glynn

Glynn

Glynn

U.S. Geological Survey, test well 3

U.S. Geological Survey, test well 11

U.S. Geological Survey, test well 4

U.S. Geological Survey, test well 1

Georgia-Pacific, south, test well 2

33H133 U.S. Geological Survey, test well 6

33H207

34H125

34H334

34H371

No data

Glynn County

B R U N S W I C K

B R U N S W I C K B R U N S W I C K

0

0

0.5

0.5 1 KILOMETER

1 MILE

N

Base from U.S. Geological Survey 

1:100,000-scale digital data

General direction of ground-water flow

Observation well

EXPLANATION

15 Potentiometric contour—Shows altitude at which water 

level would have stood in tightly cased wells in the 

upper Floridan aquifer. Dashed where approximately 

located. Hachures indicate depression. Contour 

interval 5 feet. Datum is NAVD 88.

16 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
EXPLANATION

Lower Floridan aquifer

Coastal area

Above normal—Above 75th percentile

 water level for period of record

Below normal—Below 25th percentile

 water level for period of record

Southern

Central

Normal—Between 25th and 75th 

 percentile water level for period 

 of record

Observation well, site name, and 

 comparison of monthly mean 

 water level during 2005 to 

 period-of-record water level

Base from U.S. Geological Survey

1:100,000-scale digital data

20 MILES

0 10 20 KILOMETERS

0 10

Atlantic

Ocean

Site name Water-bearing

unit 1 County

35P109 LF

33D073 LF Camden

Bryan Richmond Hill, test well

St Marys, test well (deep)

Hutchinson Island, test well 2

Georgia Department of Natural Resources, 

 Environmental Protection Division, Fort Pulaski, test well 

Georgia Department of Natural Resources, 

 Environmental Protection Division, Coffin Park, test well 1

Georgia Department of Natural Resources, 

 Environmental Protection Division, Tybee Island, test well 1

37Q186 P Chatham

38Q201 P Chatham

39Q024 LF Chatham

33H188 F Glynn U.S. Geological Survey, test well 26

U.S. Geological Survey, test well 27

Georgia Department of Natural Resources, 

 Environmental Protection Division, test well 30

McIntosh County, test well 1

Hopkins No. 2

U.S. Geological Survey, test well 16

33H206 LF Glynn Georgia-Pacific, south, test well 1

33J044 LF Glynn

34H391 LF Glynn

34H436 LF Glynn

34H500 LF Glynn

35L085 LF McIntosh

32L005 LF Wayne

1

LF, Lower Floridan aquifer; P, Paleocene unit of lower permeability; F, Fernandina permeable zone

Other identifier

Map

area

N

33H206

35P109

33D073

37Q186

37Q186

35L085

32L005

32L005

33J044

33H188

33H188

34H436

34H391

34H500

39Q024

38Q201

EFFINGHAM

EVANS BRYAN

BULLOCH

CHATHAM

LIBERTY

LONG APPLING

TOOMBS

TATTNALL

WAYNE

GLYNN

BRANTLEY

MCINTOSH

PIERCE

WARE

BACON

CHARLTON CAMDEN

CANDLER

GEORGIA

Figure 7. Ground-water levels in the Lower Floridan aquifer in the central and southern coastal areas, 

Georgia, 2005.

Table 2 and Figures 2–12  17
34H012

33H190

33H188

33G024

33G001

33G002

33G008

33G003 34G036

33G028

33G028

34G003

Well 34G005 is located 0.5 miles

 south of this map coverage

33H177

81°35' 81°30'

31°5'

31°10'

31°15'

Area of figure 8b

G LYNN C O UNTY

C AMDEN CO U

NTY

South Brunswick River

Turtle River

Brunswick River

GLYNN

COUNTY

Area of

enlarged

map

Base from U.S. Geological Survey 

1:100,000-scale digital orthophotos for Glynn County

Well with chloride concentration data and site name

EXPLANATION

0 0.5 1 KILOMETER

0 0.5 1 MILE

Figure 8A. Chloride-monitoring network in the Brunswick–Glynn County area, Georgia, June 2005.

A.

Figure 8. (A) Chloride-monitoring network in the Brunswick–Glynn County area, Georgia, June 2005; 

(B) chloride-monitoring network in the Brunswick area, Georgia, June 2005.

18  USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
81°30'

31°7'30"

31°10'

34H134

33H222 33H120

34H449

33H211

33H221 33H130

33H154 33H227 34H469

34H427

33H183 33H133

33H127

33H213

33H212

34H075

34H450

33H113 34H374

34H413 34H078

34H402

34H401

34H373 34H426 34H344 34H400 34H334

34H514

33H207

33H206 34H355

34H354

34H434

34H125 34H445

34H438

34H515

34H436

34H117

34H112

34H448

34H446 34H393

34H403

34H128

34H391 34H371

34H428

34H399

34H398

34H095 34G002

34G002

Brunswick River

Turtle

River

East River

Base from U.S. Geological Survey 

1:100,000-scale digital orthophotos for Glynn County

Well with chloride concentration data and site name

EXPLANATION

0 0.25 0.5 KILOMETER

0 0.25 0.5 MILE

B.

Figure 8. (A) Chloride-monitoring network in the Brunswick–Glynn County area, Georgia, June 2005; 

(B) Chloride-monitoring network in the Brunswick area, Georgia, June 2005.—Continued

Table 2 and Figures 2–12  19
CHLORIDE CONCENTRATION, IN MILLIGRAMS PER LITER

Well 34H393

Interval tapped, 615–723 feet

Upper water-bearing zone,

Upper Floridan aquifer

Well 34H403

Interval tapped, 788–982 feet

Upper water-bearing zone,

Upper Floridan aquifer

Well 34H391

Interval tapped, 1,070–1,159 feet

Brackish-water zone,

Lower Floridan aquifer

3,500

3,000

2,500

2,000

1,500

1,000

500

3,500

3,000

2,500

2,000

1,500

1,000

500

3,500

3,000

2,500

2,000

1,500

1,000

500

1965 1970 1975 1980 1985 1990 1995 2000 2005

Figure 9. Chloride concentration in water for selected wells in the southern Brunswick area, Georgia, 

1968–2005 (see figure 8B for well location).

20 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Well 33H127

Interval tapped, 823–925 feet

Lower water-bearing zone,

Upper Floridan aquifer

Well 33H133

Interval tapped, 520–790 feet

Upper water-bearing zone,

Upper Floridan aquifer

2,500

2,000

1,500

1,000

500

0

2,500

2,000

1,500

1,000

500

0

CHLORIDE CONCENTRATION, IN MILLIGRAMS PER LITER

1965 1970 1975 1980 1985 1990 1995 2000 2005

Figure 10. Chloride concentration in water for selected wells in the northern Brunswick area, Georgia, 

1966–2005 (see figure 8B for well location).

Table 2 and Figures 2–12 21
East River

Oglethorpe Bay

Newcastle St

Norwich St

TURTLE

RIVER

Stonewall St

Newcastle St

Oglethorpe Bay

Stonewall St

Norwich St

4th St

4th St

4th St

TURTLE

RIVER

0

0

0.5

0.5 1 KILOMETER

1 MILE

N

East River

Oglethorpe Bay

Newcastle St

Norwich St

TURTLE

RIVER

Stonewall St

ANDREWS

ISLAND

ANDREWS

ISLAND

ANDREWS

ISLAND

East River

250

750

1,250

1,750

2,250

2,690

Change in chloride concentra-

 tion in water from the upper 

 water-bearing zone of the 

 Upper Floridan aquifer—

In milligrams per liter

 EXPLANATION

Base from U.S. Geological Survey 

1:100,000-scale digital data

Area of 

enlarged

map

GEORGIA

Glynn County Glynn

County

Change in chloride concentration from 2004 to 2005

Chloride concentration, June 2004 Chloride concentration, June 2005

Chloride concentration in 

 water from the upper 

 water-bearing zone of the 

 Upper Floridan aquifer—

 In milligrams per liter

–20 to 0

1 to 50

51 to 150

151 to 490

–116 to –21

B R U N S W I C K B R U N S W I C K

B R U N S W I C K

Observation well

Figure 11. Chloride concentration in the Upper Floridan aquifer in the Brunswick area, Georgia, June 2004 and June 2005.

22 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
CHLORIDE CONCENTRATION, IN MILLIGRAMS PER LITER

0

5

10

15

20

25

30

35

0

1,000

4,000

5,000

6,000

2,000

3,000

12.5

13.0

13.5

14.0

14.5

0

500

1,000

(Has been destroyed or plugged) 2005 sample from

replacement

well 34H515

1,500

2,000

2,500

3,000

Brunswick aquifer system,

well 34H446

Surficial aquifer, well 34H448

Surficial aquifer, well 34H438

Surficial aquifer, well 34H428

1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003 2005

Figure 12. Chloride concentration in observation wells in the surficial and Brunswick aquifer systems, in the 

Brunswick area, Georgia, 1983–2005 (see figure 8B for well location).

Table 2 and Figures 2–12 23

Appendix A. Records of Geophysical Logs from 

Well 34G003 Collected during October 2005

Appendix A 25
Bottom of 4-inch steel casing

Cavernous zones within the 

lower Brunswick aquifer

0 200 400 600 800 1,000 1,200

0 200 400 600 800 1,000 1,200

250

300

350

400

450

500

550

600

650

0 5 10 15

NATURAL GAMMA, IN AMERICAN CALIPER, IN INCHES 

PETROLEUM INSTITUTE UNITS

SPECIFIC CONDUCTANCE, IN

MICROSIEMENS PER CENTIMETER

AT 25 DEGREES CELSIUS

DEPTH, BELOW LAND SURFACE

20

Natural

gamma

Specific

conductance

A-marker

B-marker

C-marker

Upper Brunswick

aquifer

Lower Brunswick

aquifer

Upper Floridan

aquifer

Figure A1. Examples of geophysical logs collected from an unused irrigation well, located 

near the access road to Jekyll Island, using a multiparameter logging tool. The naturalgamma logs are used to determine different water-bearing units, the specific conductance 

log indicates water with higher conductivity entering the well from the Upper Floridan aquifer, 

and the caliper log indicates good water-producing zones within the lower Brunswick aquifer.

26 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Appendix B. Georgia Environmental Protection Division/

MACTEC Saltwater Intrusion Monitoring Program Report

Appendix B 27
28  USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program

February 6, 2006 

Ms. Sue Grunwald 

Program Manager 

Water Resources Branch 

Environmental Protection Division 

Georgia Department of Natural Resources 

19 Martin Luther King, Jr. Drive, Suite 400 

Atlanta, Georgia 30334 

Mr. John S. Clarke 

Assistant District Chief 

U.S. Geological Survey 

3039 Amwiler Road, Suite 130 

Atlanta, Georgia 30360 

Subject: Fourth Quarter Monitoring Report – Year 2005 

Salt-Water Monitoring of the Upper Floridan Aquifer 

Brunswick, Georgia 

MACTEC Project Number 12000-1-0071

Dear Ms. Grunwald and Mr. Clarke: 

MACTEC Engineering and Consulting, Inc. (MACTEC), is pleased to present you with the 

results of the fourth quarter 2005 salt-water monitoring conducted in Brunswick, Georgia. This is 

the final report to be prepared under the current contract. 

Monitoring System 

The monitoring system is comprised of an array of electronic water quality and water level probes 

installed within two dual-zone monitoring wells – TW34H504/505 (Southside Baptist Church 

site) and TW33H324/325 (Georgia Pacific site). Identical sets of instruments were installed in 

each well. In a single installation, the dual zone monitoring well design facilitates monitoring the 

two higher-permeable zones within the Upper Floridan aquifer at Brunswick, Georgia. 

Each zone has been instrumented with electronic water level and conductivity recorders, although 

not all are currently functional. The Hydrolab Diver® water level recorders installed in each zone 

consist of a self-contained temperature-compensated pressure transducer and datalogger 

programmed to collect water level data on an hourly basis. To eliminate the need for vented 

cables, one Hydrolab Baro-Diver® has been deployed at the TW34H504/TW34H505 wellhead to 

provide barometric data for barometric compensation of the recorded water levels. The Hydrolab 

Diver® originally installed in the lower zone of the Georgia Pacific site (TW33H325) was installed 

in the upper zone of the Southside Baptist Church site 
Appendix B 29

(TW34H504) on July 1, 2004 to replace the failing probe located there. A new pressure 

transducer/data logger probe was installed in the lower zone of the Georgia Pacific site on June 2, 

2004. This probe is a Solinst Levelogger® and is similar to the Hydrolab Diver® employed in the 

other zones, but is rated at approximately 30 psi instead of 15 psi. The increased pressure rating 

is better suited to measure the large intermittent fluctuations noted in this zone. 

The varying deployment depths and the down-hole annular space restrictions require usage of 

different specific conductivity probes in each zone. The conductivity probe deployed in the upper 

permeable zone is the dedicated Solinst ReeLogger®. This unit, which has a smaller diameter 

probe that can be used in the limited annular space of the upper zone, uses a transmission cable 

between probe and datalogger, is rated to operate at depths of up to 2,000 feet, and has a 

measuring range from 40 to 60,000 μS/cm. The lower permeable zones are monitored using the 

Hydrolab MiniSonde® 4A, a self-contained measuring and recording unit rated to operate at 

depths up to 980 feet with a measuring range of 0 to 100,000 μS/cm. The temperature and 

conductivity probes are programmed to record data on an hourly basis at a minimum, and are 

retrieved to land surface for data recovery and recalibration. 

Water Elevations 

The Hydrolab Baro-Diver® deployed at the TW34H504/TW34H505 wellhead to provide 

barometric data failed early in the second quarter of 2005. Therefore, the water elevations could 

not be corrected for barometric pressure. A review of historical barometric corrections showed the 

corrected water levels to be about three feet lower than the uncorrected water levels for both 

zones at well TW33H324/325. 

At well TW33H324/325, water levels in the upper zone for the period were recorded on an hourly 

basis between October 1 and December 31 (Figure 1) with the exception of two hours on October 

25 when the probe was recovered to attempt a download of the data. MACTEC was unable to 

recover the data from the probe; therefore, the probe was sent to the manufacturer (Solinst®) for 

assistance in the data retrieval upon final removal from the well on January 6, 2006. The data 

was received via email from Solinst® on February 3, 2006. The water levels recorded during this 

quarter showed similar daily variability not seen in the data since early in the third quarter of 2004. 

However, the variability was much greater during the fourth quarter 2005. The average for this 

quarter was 7.0 ft. below land surface (bls), with the maximum and minimum of 24.5 above land 

surface (als) and 20.4 ft bls respectively. It is unclear why the probe started showing large daily 

fluctuations in the water levels following its redeployment in October 2005. 
30 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program

At well TW33H324/325, water levels for the lower zone during the period were recorded on an 

hourly basis between October 1, 2005 and December 31, 2005 (Figure 1), and were similar to 

water levels observed in this zone during the third quarter of 2005. The average for this quarter 

was 56.9 ft. bls, with the maximum and minimum of 57.3 and 55.8 ft. bls respectively. This 

probe was replaced in June 2004 and it is not expected to be failing. 

At well TW34H504/505, water levels in the upper zone and lower zone were not recorded during 

the fourth quarter of 2005 due to the previous failures of the probes located in these zones. The 

probe in the lower zone (TW34H505) failed between the second and the third quarter of 2004 as 

first noted in the third quarter of 2004 report. The probe in the upper zone (TW34H504), 

previously installed in the lower zone well at the Georgia Pacific site (TW33H325), failed 

between the third and fourth quarter as first noted in the fourth quarter of 2004 report. Although 

no data were collected from the probes during the fourth quarter, flowing conditions were 

observed at this well indicating the water level was above land surface for this reporting period. 

This is consistent with the data from the previous quarter and historic trends for this well. 

Conductivity/Temperature

As approved by Georgia EPD, the requirement to record hourly conductivity/temperature 

measurements is waived during any time period that the water level is at or above ground surface. 

Water levels in the upper zone at well TW34H504/505 have remained above land surface since 

instrumentation in December 2001 and are known to be free flowing as of January 6, 2005. 

Accordingly, specific conductance and temperature (SCT) data from the upper zone at this well 

were not reported for this period. At well TW33H325 (lower zone), SCT data will not be 

reported for this and subsequent periods since MACTEC’s contracted initial 6-month monitoring 

period for this zone has expired. 

At well TW33H324 (upper zone), SCT for the period were recorded hourly between October 1, 

2005 and December 31, 2005 (Figure 2). The temperature appears stable throughout the period 

with an average of 27.0o Celsius. The conductivity also appeared stable and ranged from 8,986.8 

to 9,163.1 μS/cm with an average of 9,046.3 μS/cm during the fourth quarter. This is similar to 

the previous quarter (average), but greater then the Georgia EPD laboratory tested sample (7,960 

μS/cm) collected from the zone on January 4, 2002. However, it should be noted that the sample 

reflected the entire zone, whereas the probe readings are from the discrete depth of 630 ft. bls. 
Appendix B  31

MACTEC appreciates the opportunity to submit this report of Fourth Quarter Monitoring for the 

Year 2005. This report represents the final quarterly report due under the contract. We value our 

future relationship with you and Georgia EPD, and look forward to our continuing assistance on 

other projects. 

Respectfully yours, 

MACTEC ENGINEERING AND CONSULTING, INC. 

David W. Knaub Nils W. Thompson, P.G., CPG 

Staff Scientist II Principal Geologist / Project 

Manager 

cc: File 

 James R. Wallace, Sc.D., P.E. 
FIGURE 1: TW33H324/325 Water Levels (Fourth Quarter 2005)

Upper Zone

Lower Zone

Land Surface

-70.0

-60.0

-50.0

-40.0

-30.0

-20.0

-10.0

0.0

10.0

20.0

9/30/2005 0:00 10/13/2005 0:00 10/26/2005 0:00 11/8/2005 0:00 11/21/2005 0:00 12/4/2005 0:00 12/17/2005 0:00 12/30/2005 0:00

Date/Time

Date/Time

Water Level (feet below land surface)

FIGURE 2: TW33H324 Temperature and Specific Conductivity

(Fourth Quarter 2005)

Upper Zone Temperature

Upper Zone Speci fic Conductivi ty

5000

5500

6000

6500

7000

7500

8000

8500

9000

9500

9/30/05 0:00 10/14/05 0:00 10/28/05 0:00 11/11/05 0:00 11/25/05 0:00 12/9/05 0:00 12/23/05 0:00

Specific Conductivity (umhos/cm)

25

27

29

Temperature (Celsius)

32 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Appendix C. Hydrographs and Water-Level Statistics for Selected 

Wells in the City of Brunswick–Glynn County, Georgia, Area

Appendix C  33
1983

19851987198919911993199519971999

20012003

12.0

Surficial aquifer system 

2005 Calendar Year

310925081312203 Site Name: 33H208

o Latitude: 31o 09' 25" Longitude: 081 31' 22" GLYNN Period of Record: 1983 – 2005 

Well Depth: 155 feet Datum: 7.00 feet NGVD29 Well Diameter: 4.00 inches

Daily Mean Water Level 1.0

WATER LEVEL BELOW WATER LEVEL BELOW

LAND SURFACE , IN FEET LAND SURFACE, IN FEET

0

2

4

6

8

10

12

2005

1.5

2.0

2.5

3.0

3.5

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1983 – 2005

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

Monthly Water Level Statistics

Mean 2.42 2.24 2.01 1.83 2.44 1.98 1.66 1.98 1.94 

Max 2.79 2.77 2.66 2.45 2.82 2.53 2.21 2.82 2.43

Min 1.75 1.53 1.20 1.35 2.05 1.54 1.08 1.57 1.47 

1983 – 2005 

Mean 4.42 4.37 4.24 4.31 4.77 5.25 5.26 4.86 4.47 4.08 4.25 4.27 

Max 9.44 9.93 9.38 8.96 8.74 9.56 9.97 10.04 9.12 8.92 8.92 9.16 

Min 1.75 1.24 0.77 1.31 1.21 2.16 2.44 2.05 1.54 1.08 1.57 1.47 

Monthly Mean Water Level1983 – 2005 - 2.0

0.0

2005

WATER LEVEL BELOW

LAND SURFACE, IN FEET

2.0

4.0

6.0

8.0

10.0

Negative value indicates water level above land surface

34  USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Surficial aquifer system 

2005 Calendar Year

311059081285702 Site Name: 34H492

o Latitude: 31o 10' 59" Longitude: 081 28' 57" GLYNN Period of Record: 1999 – 2005 

Well Depth: 48.5 feet Datum: 12.54 feet NAVD88 Well Diameter: 2 inches

Daily Mean Water Level 0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

W

OLEB LEVEL RETA W

TEEF NI , ECAFRUS DNAL

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1999 – 2005

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

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

Monthly Water Level Statistics

WATER LEVEL BELOW

LAND SURFACE, IN FEET

2005

Mean 2.92 2.90 1.82 1.48 1.95 2.64 1.86 2.02 2.14 1.58 2.04 1.84

Max 3.17 3.23 2.24 2.04 2.33 3.13 2.70 2.68 3.41 3.44 2.35 2.46

Min 2.67 2.03 1.21 0.91 1.51 1.81 0.82 0.93 1.11 0.91 1.56 1.29

1999 – 2005 

Mean 3.81 3.63 3.05 3.21 3.93 4.24 4.09 3.88 3.13 2.98 3.50 3.44

Max 4.90 4.69 4.91 4.65 5.51 5.95 6.54 6.62 5.38 4.51 4.85 4.84

Min 2.36 2.03 0.78 0.91 1.51 1.81 0.82 0.93 1.03 0.91 1.56 1.29

Monthly Mean Water Level1999 -- 2005 - 2.0

0.0

2.0

4.0

6.0

8.0

W

OLEB LEVEL RETA W

TEEF NI , ECAFRUS DNAL

1999 2000 2001 2002 2003 2004 2005

Negative value indicates water level above land surface

Appendix C  35
Surficial aquifer system

2005 Calendar Year

310902081284201 Site Name: 34H515

" o Latitude: 31 ' o 09' 02 Longitude: 081 28 42" GLYNN Period of Record: 2005 – 2005

Well Depth: 205 feet Datum: 9 feet NGVD29 Well Diameter: 2 inches

Daily Mean Water Level 1.0

1.5

2.0

2.5

3.0

3.5

4.0

WATER LEVEL BELO

W

LAND SURFACE , IN FEET

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 2005 – 2005

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

Monthly Water-Level Statistics

0.0

1.0

2.0

3.0

4.0

WATER LEVEL BELO

W

LAND SURFACE, IN FEET 2005

Mean 3.12 2.83 2.31 1.84 2.26 2.40

Max 3.43 3.20 2.55 2.17 2.68 2.60

Min 2.89 2.44 1.82 1.43 1.81 2.17

2005 – 2005

Mean 3.03 3.12 2.83 2.31 1.84 2.26 2.40

Max 3.11 3.43 3.20 2.55 2.17 2.68 2.60

Min 2.98 2.89 2.44 1.82 1.43 1.81 2.17

Monthly Mean Water Level 2005 – 2005 - 2.0

0.0

2.0

4.0

6.0

WATER LEVEL BELO

W

LAND SURFACE, IN FEET

2005

Negative value indicates water level above land surface

36 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Surficial aquifer system 

2005 Calendar Year

311909081281103 Site Name: 34J082

o Latitude: 31o 19 ' 09" Longitude: 081 28' 11" GLYNN Period of Record: 2002 – 2005 

Well Depth: 160 feet Datum: 15.90 feet NGVD29 Well Diameter: 4 inches

Daily Mean Water Level 4.0

4.5

5.0

5.5

6.0

6.5

7.0

7.5

W

OLEB LEVEL RETA W

TEEF NI , ECAFRUS DNAL

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 2002 – 2005

0.0

2.0

4.0

6.0

8.0

10.0

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

Monthly Water Level Statistics

WATER LEVEL BELOW

LAND SURFACE, IN FEET

2005

Mean 7.04 7.00 6.51 5.73 6.09 6.23 6.02 6.69 6.05 4.93 5.48 5.44

Max 7.15 7.31 6.80 6.19 6.28 6.34 6.87 7.11 6.29 6.19 5.85 5.82

Min 6.89 6.66 6.10 5.27 5.91 5.93 5.56 6.21 5.80 4.44 5.06 5.17

2002 – 2005 

Mean 7.11 7.06 6.36 6.38 7.27 7.41 7.47 7.33 6.62 6.20 6.56 6.66

Max 7.45 7.37 7.18 8.02 9.26 9.41 8.99 9.17 8.50 7.08 7.28 7.31

Min 6.76 6.49 5.25 5.27 5.91 5.89 5.56 5.79 5.80 4.44 5.06 5.17

Monthly Mean Water Level 2002 – 2005 4.0

6.0

8.0

10.0

12.0

W

OLEB LEVEL RETA W

TEEF NI , ECAFRUS DNAL

2002 2003 2004 2005

Negative value indicates water level above land surface

Appendix C  37
1983

19851987198919911993199519971999200120032005

Upper Brunswick aquifer 

2005 Calendar Year

310901081284402 Site Name: 34H437

o Latitude: 31o 09' 01" Longitude: 081 28 ' 44" GLYNN Period of Record: 1983 – 2005 

Well Depth: 328 feet Datum: 7.00 feet NGVD29 Well Diameter: 10.00 inches

Daily Mean Water Level - 5.0

- 4.5

- 4.0

- 3.5

- 3.0

- 2.5

- 2.0

WOLEBLEVELRETAW

TEEFNI,ECAFRUSDNAL

-10

- 5

0

5

10

WOLEBLEVELRETAW

TEEFNI,ECAFRUSDNAL

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1983 – 2005

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

Monthly Water Level Statistics 2005

Mean -4.28 -4.21 -4.07 -3.95 -4.06 -4.15 -3.70 -2.98 -3.30

Max -3.97 -3.61 -3.88 -3.73 -3.79 -3.84 -3.06 -2.75 -2.82

Min -4.67 -4.79 -4.33 -4.24 -4.40 -4.31 -4.12 -3.14 -3.65

1983 – 2005

Mean 0.14 -0.19 -0.35 -0.31 0.08 0.86 1.38 1.81 1.36 1.02 0.68 0.41 

Max 6.15 5.64 5.58 5.60 5.72 5.90 7.32 7.80 7.74 6.53 5.97 6.12

Min -4.67 -5.08 -5.21 -5.11 -4.40 -4.31 -4.12 -3.14 -3.65 -3.62 -3.38 -4.29

Monthly Mean Water Level1983 – 2005 - 8.0

- 6.0

10.0

WATER LEVEL BELOW

LAND SURFACE, IN FEET

- 4.0

- 2.0

0.0

2.0

4.0

6.0

8.0

Negative value indicates water level above land surface

38  USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Upper Brunswick aquifer 

2005 Calendar Year

311530081363904 Site Name: 33J065

o Latitude: 31o 15' 30" Longitude: 081 36' 39" GLYNN Period of Record: 2001 – 2005

Well Depth: 412 feet Datum: 12 feet NGVD29 Well Diameter: 6 inches

- 3.0

- 2.8

- 2.6

- 2.4

- 2.2

- 2.0

- 1.8

- 1.6

- 1.4

- 1.2

- 1.0

WATER LEVEL BELO

W

LAND SURFACE , IN FEET

Daily Mean Water Level

WATER LEVEL BELOW

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 2001 – 2005

- 3.0

- 2.0

- 1.0

0.0

1.0

2.0

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

Monthly Water-Level Statistics 2005 LAND SURFACE, IN FEET

Mean -1.29 -1.47 -1.71 -1.85 -1.97 -2.04 -2.02 -1.89 -1.97 -2.15 -2.04 -2.08

Max -1.18 -1.37 -1.60 -1.75 -1.85 -1.97 -1.87 -1.79 -1.90 -1.87 -1.96 -1.93

Min -1.43 -1.74 -1.87 -1.98 -2.10 -2.14 -2.19 -2.05 -2.04 -2.36 -2.17 -2.22

2001 – 2005

Mean -0.12 -0.27 -0.54 -0.61 -0.53 -0.25 -0.23 -0.17 -0.24 -0.32 -0.31 -0.39

Max 1.31 1.23 1.13 0.93 1.21 1.31 1.44 1.58 1.43 1.26 1.26 1.33

Min -1.43 -1.74 -1.87 -1.98 -2.10 -2.14 -2.19 -2.05 -2.04 -2.36 -2.17 -2.22

Monthly Mean Water Level 2001 – 2005 - 4.0

- 2.0

0.0

2.0

4.0

WATER LEVEL BELO

W

LAND SURFACE, IN FEET

2001 2002 2003 2004 2005

Negative value indicates water level above land surface

Appendix C  39
Upper Brunswick aquifer 

2005 Calendar Year

311711081283002 Site Name: 34J077 

o Latitude: 31o 17 ' 11" Longitude: 081 28' 30" GLYNN Period of Record: 1998 – 2005 

Well Depth: 390 feet Datum: 15 feet NGVD29 Well Diameter: 4 inches

Daily Mean Water Level 19.0

WATER LEVEL BELOW WATER LEVEL BELOW

LAND SURFACE , IN FEET LAND SURFACE, IN FEET

20.0

21.0

22.0

23.0

24.0

25.0

26.0

27.0

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1998 – 2005

0

5

10

15

20

25

30

35

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

Monthly Water Level Statistics 2005

Mean 21.41 20.93 20.65 20.55 21.93 22.57 23.00 24.27 23.60 

Max 21.97 21.50 21.79 22.07 23.68 23.92 25.70 25.96 24.55

Min 20.91 20.48 19.81 19.77 20.76 21.39 21.04 23.11 22.93 

1998 – 2005

Mean 17.96 17.46 17.46 18.71 22.02 22.33 21.50 22.00 20.54 

Max 22.5 22.5 23.9 27.5 29.6 30.0 28.1 27.5 26.33 

Min 9.40 8.91 8.87 9.30 9.66 9.53 9.62 9.70 9.77 

Monthly Mean Water Level 1998 – 2005 8.0

10.0

12.0

14.0

16.0

18.0

20.0

22.0

24.0

26.0

28.0

30.0

32.0

1998 1999 2000 2001 2002 2003 2004 2005

WATER LEVEL BELOW

LAND SURFACE, IN FEET

21.76 22.23 21.11

23.31 23.11 21.88

21.27 21.07 20.19

20.35 19.95 18.85

26.29 25.10 23.65

9.71 9.81 9.78

Negative value indicates water level above land surface

40 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Upper Brunswick aquifer 

2005 Calendar Year

311909081281102 Site Name: 34J081

o Latitude: 31 o

19 ' 09" Longitude: 081 28 ' 11" GLYNN Period of Record: 2002 – 2005 

Well Depth: 435 feet Datum: 14.68 feet NGVD29 Well Diameter: 4 inches

Daily Mean Water Level 11.0

11.5

12.0

12.5

13.0

13.5

14.0

14.5

W

OLEB LEVEL RETA W

TEEF NI , ECAFRUS DNAL

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 2002 – 2005

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

Monthly Water Level Statistics 2005

0.0

5.0

10.0

15.0

20.0

W

OLEB LEVEL RETA W

TEEF NI , ECAFRUS DNAL Mean 13.55 13.04 12.69 12.19 12.60 12.94 12.99 13.67 13.63 12.97 12.95 12.63

Max 13.86 13.25 12.89 12.45 12.83 13.17 13.44 13.89 13.76 13.57 13.09 12.91

Min 13.25 12.64 12.32 11.91 12.31 12.81 12.85 13.46 13.55 12.77 12.76 12.26

2002 – 2005 

Mean 13.62 13.10 12.65 12.85 13.77 14.43 14.92 15.12 14.82 14.39 14.14 13.72

Max 14.24 13.97 13.46 14.83 16.49 16.85 16.49 16.38 16.04 15.48 15.04 14.84

Min 12.89 12.54 11.90 11.91 12.31 12.81 12.85 13.46 13.55 12.77 12.76 12.26

Monthly Mean Water Level 2002 – 2005 8.0

10.0

12.0

14.0

16.0

18.0

W

OLEB LEVEL RETA W

TEEF NI , ECAFRUS DNAL

2002 2003 2004 2005

Negative value indicates water level above land surface

Appendix C  41
Lower Brunswick aquifer 

2005 Calendar Year

311530081363901 Site Name: 33J062 

" o Latitude: 31 ' o 15' 30 Longitude: 081 36 39" GLYNN Period of Record: 2001 – 2005

Well Depth: 500 feet Datum: 12.00 feet NGVD29 Well Diameter: 6.00 inches

Daily Mean Water Level -18.0

-17.5

-17.0

-16.5

-16.0

-15.5

-15.0

-14.5

-14.0

WATER LEVEL BELO

W

LAND SURFACE , IN FEET

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 2001 – 2005

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

Monthly Water-Level Statistics 2005

-20

-15

-10

- 5

0

WATER LEVEL BELO

W

LAND SURFACE, IN FEET Mean -14.56 -15.30 -15.93 -16.68 -17.18 -16.85 -16.36 -16.07 -16.30 -16.36 -16.14 -16.25

Max -14.02 -14.70 -15.59 -16.28 -16.90 -16.40 -15.91 -15.91 -16.10 -16.02 -16.01 -15.93

Min -15.12 -15.88 -16.37 -17.03 -17.57 -17.41 -16.63 -16.34 -16.53 -16.66 -16.30 -16.58

2001 – 2005

Mean -12.28 -12.82 -13.35 -13.56 -12.80 -11.22 -11.00 -11.49 -11.70 -11.82 -12.32 -12.85

Max -8.67 -8.94 -9.62 -9.23 -7.17 -6.89 -6.76 -6.77 -7.00 -7.90 -8.65 -8.64

Min -15.12 -15.88 -16.37 -17.03 -17.57 -17.41 -16.63 -16.34 -16.53 -16.66 -16.30 -16.58

Monthly Mean Water Level 2001 – 2005 -20

-16

-12

- 8

- 4

0

4

WATER LEVEL BELO

W

LAND SURFACE, IN FEET

2001 2002 2003 2004 2005

Negative value indicates water level above land surface

42 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Lower Brunswick aquifer 

2005 Calendar Year

311909081281101 Site Name: 34J080

o Latitude: 31o 19' 09" Longitude: 081 28' 11" GLYNN Period of Record: 2002 – 2005 

Well Depth: 555 feet Datum: 13.66 feet NGVD29 Well Diameter: 4 inches

Daily Mean Water Level - 1.0

- 0.5

0.0

0.5

1.0

1.5

2.0

W

OLEB LEVEL RETA W

TEEF NI , ECAFRUS DNAL

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 2002 – 2005

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

Monthly Water Level Statistics 2005

- 2

0

2

4

6

8

W

OLEB LEVEL RETA W

TEEF NI , ECAFRUS DNAL Mean 1.10 0.34 0.25 0.02 0.17 0.30 0.68 1.37 1.32 0.80 0.81 0.58

Max 1.63 0.59 0.41 0.21 0.31 0.68 1.14 1.53 1.70 1.23 0.96 0.89

Min 0.52 -0.06 0.06 -0.25 -0.01 0.07 0.48 1.16 1.14 0.58 0.65 0.16

2002 – 2005 

Mean 1.43 1.12 0.84 1.04 2.57 3.38 3.49 3.60 3.18 2.54 2.29 1.65

Max 2.65 2.84 2.44 2.04 6.41 6.85 6.89 6.78 6.57 5.74 4.94 3.85

Min 0.52 -0.13 -0.17 -0.25 -0.01 0.07 0.48 1.16 1.14 0.58 0.65 0.16

Monthly Mean Water Level 2002 – 2005 - 2.0

0.0

2.0

4.0

6.0

8.0

W

OLEB LEVEL RETA W

TEEF NI , ECAFRUS DNAL

2002 2003 2004 2005

Negative value indicates water level above land surface

Appendix C  43
Lower Brunswick aquifer 

2005 Calendar Year

311456081210504 Site Name: 35H077

o Latitude: 31o 14' 56" Longitude: 081 21' 05" GLYNN Period of Record: 2005 – 2005

Well Depth: 537 feet Datum: 20 feet NAVD88 Well Diameter: 6 inches

Daily Mean Water Level 10

Apr May Jun Jul Aug Sep Oct Nov Dec

2005 and Max, Mean, and Min Monthly Mean for 2005 – 2005

Apr May Jun Jul Aug Sep Oct Nov Dec 

Monthly Water Level Statistics

WATER LEVEL BELOW WATER LEVEL BELOW

LAND SURFACE , IN FEET LAND SURFACE, IN FEET

12

14

16

18

20

22

Jan Feb Mar

Monthly Mean for

0

5

10

15

20

25

Jan Feb Mar

2005

Mean 16.66 15.76 17.14 16.96 

Max 21.17 20.63 19.75 19.14

Min 10.83 12.18 13.96 13.12 

2005 – 2005

Mean 18.30 14.94 16.66 15.76 17.14 16.96 

Max 19.21 17.92 21.17 20.63 19.75 19.14

Min 16.99 13.39 10.83 12.18 13.96 13.12 

Monthly Mean Water Level 2005 – 2005 10.0

12.0

WATER LEVEL BELOW

LAND SURFACE, IN FEET

14.0

16.0

18.0

20.0

22.0

24.0

2005

Negative value indicates water level above land surface

44  USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Brunswick aquifer system

2005 Calendar Year

310629081323301 Site Name: 33G028

" o Latitude: 31 ' o 06' 29 Longitude: 081 32 33" GLYNN Period of Record: 1998 – 2005

Well Depth: 475 feet Datum: 10 feet NGVD29 Well Diameter: 6 inches

Daily Mean Water Level -17.0

-16.5

-16.0

-15.5

-15.0

-14.5

-14.0

WATER LEVEL BELO

W

LAND SURFACE , IN FEET

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1998 – 2005

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

Monthly Water-Level Statistics 2005

-20

-15

-10

- 5

0

WATER LEVEL BELO

W

LAND SURFACE, IN FEET Mean -15.70 -15.88 -15.75 -15.90 -16.21 -15.52 -15.03 -14.98 -15.48 -15.71 -15.39 -15.57

Max -15.27 -15.72 -15.59 -15.57 -15.96 -14.99 -14.66 -14.73 -15.29 -15.35 -15.20 -15.36

Min -16.30 -16.22 -16.07 -16.11 -16.54 -16.25 -15.22 -15.36 -15.72 -15.97 -15.68 -15.77

1998 2005 –

Mean -11.91 -12.54 -12.64 -12.35 -11.48 -10.45 -10.26 -10.37 -11.05 -11.65 -11.74 -12.09

Max -8.27 -9.66 -9.64 -8.64 -7.85 -6.89 -6.59 -6.79 -7.29 -8.18 -8.30 -8.35

Min -16.30 -16.84 -16.50 -16.11 -16.54 -16.25 -15.22 -15.36 -15.72 -15.97 -15.68 -15.77

Monthly Mean Water Level 1998 – 2005 -18

-14

-10

- 6

WATER LEVEL BELO

W

LAND SURFACE, IN FEET

1998 1999 2000 2001 2002 2003 2004 2005

Negative value indicates water level above land surface

Appendix C  45
1962

19651970

197519801985

19901995

2000

2005

Upper Floridan aquifer

2005 Calendar Year 

311007081301701 Site Name: 33H127 

o Latitude: 31o 10' 06" Longitude: 081 30' 16" GLYNN Period of Record: 1962 – 2005 

Well Depth: 952 feet Datum: 6.15 feet NGVD29 Well Diameter: 7.00 inches

Daily Mean Water Level -15

WATER LEVEL BELOW WATER LEVEL BELOW

LAND SURFACE , IN FEET LAND SURFACE, IN FEET

-14

-13

-12

-11

-10

- 9

- 8

- 7

- 6

-20

-15

-10

- 5

0

5

10

15

2005

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1962 – 2005

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

Monthly Water Level Statistics

Mean -9.10 -8.07 -8.38 -8.34 -9.60 -7.69 -7.57 -7.15 -7.81 -7.70 -8.04 -8.42 

Max -7.41 -7.18 -6.96 -7.27 -7.88 -6.83 -6.56 -6.29 -7.17 -6.89 -7.23 -7.77

Min -14.02 -9.36 -10.53 -9.36 -12.11 -9.93 -8.36 -8.66 -8.73 -9.43 -9.84 -9.02 

1962 – 2005 

Mean 0.99 1.13 0.99 1.41 2.08 3.57 3.64 3.21 2.77 2.12 1.75 1.25 

Max 9.58 9.88 8.78 9.46 10.00 12.38 13.22 12.74 12.64 10.10 9.80 10.03

Min -14.02 -11.80 -10.53 -10.50 -12.11 -9.93 -8.36 -12.70 -13.60 -14.00 -13.00 -15.00 

Monthly Mean Water Level1962 – 2005 -16.0

-12.0

16.0

WATER LEVEL BELOW

LAND SURFACE, IN FEET

- 8.0

- 4.0

0.0

4.0

8.0

12.0

Negative value indicates water level above land surface

46 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Upper Floridan aquifer

2005 Calendar Year

311007081301702 Site Name: 33H133

" o Latitude: 31 ' o 10' 06 Longitude: 081 30 16" GLYNN Period of Record: 1964 – 2005


Well Depth: 790 feet Datum: 6.71 feet NGVD29 Well Diameter: 4.00 inches


Daily Mean Water Level - 6.0

- 5.0

- 4.0

- 3.0

- 2.0

- 1.0

0.0

1.0

WATER LEVEL BELO

W

LAND SURFACE , IN FEET

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1964 – 2005

-15

-10

- 5

0

5

10

15

20

25

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

Monthly Water-Level Statistics 2005

WATER LEVEL BELOW

LAND SURFACE, IN FEET

Mean -2.34 -1.83 -0.75 -0.80 -2.72 -1.50 -0.59 -0.54 -1.19 -1.68 -1.28 -1.35 

Max -0.66 -1.12 0.45 0.01 -1.29 -0.68 0.96 0.42 -0.69 -0.97 -0.53 -0.65

Min -5.57 -2.34 -1.94 -2.17 -4.25 -3.21 -1.98 -1.54 -1.95 -2.57 -3.11 -2.10 

1964 – 2005

Mean 9.01 9.19 8.78 9.27 9.97 11.34 11.74 10.91 10.85 10.24 9.92 8.82

Max 20.37 19.40 19.79 20.20 21.25 21.50 21.87 21.63 20.97 21.28 20.71 21.30

Min -5.57 -7.45 -3.25 -3.96 -4.25 -3.21 -2.10 -1.56 -3.44 -2.57 -5.61 -9.07

Monthly Mean Water Level 1964 – 2005 -12

- 8

24

1964 1965197019751980198519901995

2000

2005

WATER LEVEL BELOW

LAND SURFACE, IN FEET

- 4

0

4

8

12

16

20

Negative value indicates water level above land surface

Appendix C  47
1983

19851987198919911993199519971999

20012003

18.0

Upper Floridan aquifer 

2005 Calendar Year

310925081312202 Site Name: 33H207

o Latitude: 31o 09' 25" Longitude: 081 31' 22" GLYNN Period of Record: 1983 – 2005 

Well Depth: 720 feet Datum: 7.00 feet NGVD29 Well Diameter: 4.00 inches

Daily Mean Water Level -12.0

-11.0

-10.0

- 9.0

- 8.0

- 7.0

- 6.0

- 5.0

- 4.0

WOLEBLEVELRETAW

TEEFNI,ECAFRUSDNAL

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1983 – 2005

-15

-10

- 5

0

5

10

15

20

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

Monthly Water Level Statistics 2005

WATER LEVEL BELOW

LAND SURFACE, IN FEET

Mean -8.12 -7.77 -6.41 -6.72 -8.58 -7.40 -6.58 -6.61 -7.32 -7.58 -7.00 -6.93 

Max -6.11 -6.45 -4.30 -5.77 -7.48 -6.74 -5.26 -5.32 -6.81 -6.86 -5.66 -6.09

Min -11.26 -8.33 -7.84 -8.03 -9.79 -8.83 -7.80 -7.55 -7.99 -8.52 -8.65 -7.98 

1983 – 2005 

Mean 2.12 1.43 1.13 1.38 2.09 4.34 5.00 4.89 4.03 2.56 2.48 2.10 

Max 13.30 13.78 11.14 11.90 13.27 15.68 16.42 14.67 16.57 14.79 13.49 13.47

Min -11.26 -13.19 -8.81 -8.95 -9.79 -8.83 -7.80 -7.55 -7.99 -9.22 -9.86 -8.34 

Monthly Mean Water Level1983 – 2005 -16.0

-12.0

WATER LEVEL BELOW

LAND SURFACE, IN FEET

- 8.0

- 4.0

0.0

4.0

8.0

12.0

16.0

2005

Negative value indicates water level above land surface

48  USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Upper Floridan aquifer

2005 Calendar Year

310418081244701 Site Name: 34G033

" o Latitude: 31 ' o

04 ' 23 Longitude: 081 24 51" GLYNN Period of Record: 2004 – 2005

Well Depth: 751 feet Datum: 13.00 feet NGVD29 Well Diameter: 8.00 inches 

Daily Mean Water Level -24.0

-23.5

-23.0

-22.5

-22.0

-21.5

-21.0

-20.5

-20.0

WATER LEVEL BELO

W

LAND SURFACE , IN FEET

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 2004 – 2005

WATER LEVEL BELOW

-25.0

-24.0

-23.0

-22.0

-21.0

-20.0

-19.0

LAND SURFACE, IN FEET

2005 Monthly Water-Level Statistics

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

Mean –23.13 -23.32 -23.11 -22.98 -22.58 -21.88 -21.66 -21.91 -22.37 -22.87 -22.75 -23.17

Max –22.40 -22.81 -22.83 -22.56 -22.21 -20.72 -20.74 -20.89 -21.19 -22.42 -22.44 -22.73

Min –23.65 -23.79 -23.48 -23.59 -22.88 -22.80 -22.13 -22.54 -22.95 -23.20 -23.09 -23.58

2004 2005 –

Mean -23.13 -23.32 -23.11 -22.98 -22.58 -21.88 -21.66 -21.91 -22.37 -22.81 -22.53 -22.92

Max -22.40 -22.81 -22.83 -22.56 -22.21 -20.72 -20.74 -20.89 -21.19 -22.24 -22.13 -22.39

Min -23.65 -23.79 -23.48 -23.59 -22.88 -22.80 -22.13 -22.54 -22.95 -23.20 -23.09 -23.58

Monthly Mean Water Level 2004 – 2005 -26.0

-24.0

-22.0

-20.0

WATER LEVEL BELO

W

LAND SURFACE, IN FEET

2004 2005

Negative value indicates water level above land surface

Appendix C  49
1962

19651970

197519801985

19901995

2000

2005

Upper Floridan aquifer 

2005 Calendar Year

310938081285301 Site Name: 34H334

Latitude: 31o 09' 38" o Longitude: 081 28 ' 53" GLYNN Period of Record: 1962 – 2005 

Well Depth: 980 feet Datum: 8.33 feet NGVD29 Well Diameter: 4.00 inches

Daily Mean Water Level -12.0

-11.5

-11.0

-10.5

-10.0

- 9.5

- 9.0

- 8.5

- 8.0

- 7.5

- 7.0

W

OLEB LEVEL RETA W

TEEF NI , ECAFRUS DNAL

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1962 – 2005

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

Monthly Water Level Statistics 2005

-15

-10

- 5

0

5

10

WATER LEVEL BELO

W

LAND SURFACE, IN FEET Mean -9.47 -9.30 -9.08 -9.18 -9.98 -9.04 -8.78 -8.47 -9.07 -9.44 -9.11 -9.39 

Max -8.73 -9.05 -8.52 -8.62 -9.22 -8.57 -7.93 -7.90 -8.66 -8.67 -8.79 -8.84

Min -11.28 -9.60 -10.02 -9.64 -10.90 -10.13 -9.34 -9.08 -9.58 -10.10 -9.68 -9.77 

1962 – 2005 

Mean -3.49 -3.93 -3.91 -3.59 -2.10 -0.82 -0.38 -0.19 -1.10 -2.50 -2.85 -3.28 

Max 6.17 5.50 5.74 6.58 7.70 8.65 8.62 8.44 8.19 7.25 6.59 7.51

Min -11.28 -12.10 -10.27 -9.92 -10.90 -10.13 -9.34 -9.08 -9.58 -10.10 -9.68 -9.81 

Monthly Mean Water Level1962 – 2005 -14.0

-12.0

10.0

WATER LEVEL BELOW

LAND SURFACE, IN FEET

-10.0

- 8.0

- 6.0

- 4.0

- 2.0

0.0

2.0

4.0

6.0

8.0

Negative value indicates water level above land surface

50 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
1967

1970

6

Upper Floridan aquifer

2005 Calendar Year

310818081293701 Site Name: 34H371

" o Latitude: 31 ' o 08 ' 18 Longitude: 081 29 36" GLYNN Period of Record: 1967 – 2005

Well Depth: 700 feet Datum: 9.49 feet NGVD29 Well Diameter: 2.00 inches 

Daily Mean Water Level -12.0

-11.5

-11.0

-10.5

-10.0

- 9.5

- 9.0

- 8.5

- 8.0

WATER LEVEL BELO

W

LAND SURFACE , IN FEET

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1967 – 2005

-15

-10

- 5

0

5

10

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

Monthly Water-Level Statistics 2005

WATER LEVEL BELOW

LAND SURFACE, IN FEET

Mean -10.16 -10.01 -9.69 -9.72 -10.39 -9.45 -9.11 -8.91 -9.49 -9.85 -9.52 -9.79 

Max -9.51 -9.57 -9.20 -9.17 -9.78 -8.72 -8.37 -8.32 -9.13 -9.17 -9.19 -9.14 

Min -11.79 -10.35 -10.50 -10.15 -11.06 -10.36 -9.73 -9.42 -9.90 -10.54 -9.96 -10.29

1967 – 2005

Mean -3.32 -3.39 -3.89 -3.41 -2.59 -1.50 -1.27 -1.63 -1.89 -2.53 -2.75 -3.45 

Max 2.47 2.58 2.54 2.71 3.90 4.64 5.40 5.36 5.64 4.09 3.62 3.49 

Min -11.79 -12.49 -10.86 -10.49 -11.06 -10.36 -9.73 -9.42 -9.90 -10.54 -10.09 -10.44

Monthly Mean Water Level 1967 – 2005

WATER LEVEL BELOW

LAND SURFACE, IN FEET

-14

-10

- 6

- 2

2

1975198019851990199520002005

Negative value indicates water level above land surface

Appendix C 51
Lower Floridan aquifer

2005 Calendar Year

310810081323501 Site Name: 33H188

" o Latitude: 31 ' o 08 ' 09 Longitude: 081 32 35" GLYNN Period of Record: 1978 – 2005

Well Depth: 2,720 feet Datum: 9.37 NGVD29 Well Diameter: 10.00 inches

Daily Mean Water Level -15.0

-14.0

-13.0

-12.0

-11.0

-10.0

- 9.0

- 8.0

- 7.0

WATER LEVEL BELO

W

LAND SURFACE , IN FEET

WATER LEVEL BELOW

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1978 – 2005

-20

-15

-10

- 5

0

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

Monthly Water-Level Statistics 2005 LAND SURFACE, IN FEET

Mean -13.62 -13.82 -13.76 -14.03 -13.82 -11.84 -8.11 -8.55 -8.92 -9.23 -9.32 -9.51

Max -13.23 -13.49 -13.46 -13.73 -13.63 -7.63 -7.71 -8.33 -8.66 -9.00 -9.15 -9.14

Min -14.03 -14.07 -14.12 -14.35 -14.00 -13.66 -8.44 -8.79 -9.14 -9.54 -9.58 -9.93

1978 – 2005

Mean -8.84 -9.12 -9.18 -8.38 -7.88 -7.41 -7.25 -7.72 -8.21 -8.79 -8.61 -8.74

Max -3.30 -3.73 -3.74 -2.99 -1.74 -1.46 -2.12 -2.73 -3.61 -4.75 -2.80 -2.92

Min -14.57 -15.18 -14.93 -14.64 -14.00 -13.66 -13.00 -13.49 -13.94 -14.11 -14.03 -17.20

Monthly Mean Water Level1978 – 2005 -18

-14

-10

- 6

- 2

2

WATER LEVEL BELO

W

LAND SURFACE, IN FEET

1978 1981 1984 1987 1990 1993 1996 1999 2002 2005

Negative value indicates water level above land surface

52 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
1983

6

Lower Floridan aquifer

2005 Calendar Year

310925081312201 Site Name: 33H206

" o Latitude: 31 ' o 09' 25 Longitude: 081 31 22" GLYNN Period of Record: 1983 – 2005

Well Depth: 1,100 feet Datum: 7.00 feet NGVD29 Well Diameter: 10.00 inches

Daily Mean Water Level -15.0

-14.5

-14.0

-13.5

-13.0

-12.5

-12.0

-11.5

-11.0

-10.5

-10.0

WATER LEVEL BELOW

LAND SURFACE , IN FEET

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1983 – 2005

-20

-15

-10

- 5

0

5

10

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

Monthly Water-Level Statistics 2005

WATER LEVEL BELOW

LAND SURFACE, IN FEET

Mean -12.40 -12.20 -11.80 -12.05 -12.98 -11.84 -11.43 -11.22 -11.85 -11.98 -11.79 -11.85 

Max -11.69 -11.82 -11.10 -11.33 -12.13 -11.21 -10.65 -10.52 -11.43 -11.44 -11.38 -11.40

Min -14.42 -12.56 -12.91 -12.66 -14.06 -13.07 -12.06 -11.89 -12.37 -12.77 -12.59 -12.49 

1983 – 2005

Mean -5.30 -5.57 -5.87 -5.55 -4.78 -3.07 -2.44 -2.79 -3.39 -4.65 -4.87 -5.28 

Max 3.17 3.37 0.99 3.68 2.30 5.04 5.93 5.36 5.89 4.27 3.31 3.27 

Min -14.42 -15.45 -13.17 -12.66 -14.06 -13.07 -12.06 -11.89 -12.37 -12.80 -12.59 -15.23 

Monthly Mean Water Level 1983 – 2005 -18

WATER LEVEL BELOW

LAND SURFACE, IN FEET

-14

-10

- 6

- 2

2

19851987198919911993199519971999200120032005

Negative value indicates water level above land surface

Appendix C 53
1979

1980

Lower Floridan aquifer

2005 Calendar Year

311633081324001 Site Name: 33J044

Latitude: 31 16 o ' 33" Longitude: 081 32 o ' 40" GLYNN Period of Record: 1979 – 2005 

Well Depth: 1,910 feet Datum: 20 feet NGVD29 Well Diameter: 9.00 inches

Daily Mean Water Level - 5.0

- 4.5

- 4.0

- 3.5

- 3.0

- 2.5

- 2.0

WOLEBLEVELRETAW

TEEFNI,ECAFRUSDNAL

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1979 -- 2005

-10

- 5

0

5

10

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

Monthly Water Level Statistics 2005

WATER LEVEL BELOW

LAND SURFACE, IN FEET

Mean -3.39 -3.57 -3.58 -3.82 -4.36 -3.89 -3.55 -3.33 -3.65 -3.74 -3.50 -3.67

Max -2.84 -3.34 -3.35 -3.51 -3.87 -3.48 -3.10 -3.12 -3.41 -3.32 -3.32 -3.25

Min -4.36 -3.86 -4.09 -4.10 -4.99 -4.49 -3.88 -3.67 -3.93 -4.18 -3.76 -4.06

1979 – 2005

Mean 0.48 0.29 0.03 0.12 0.77 1.84 2.30 2.52 2.12 1.34 1.10 0.77

Max 6.31 6.14 4.87 4.63 5.39 7.52 8.23 8.09 8.44 7.82 6.79 6.53

Min -4.36 -4.41 -5.09 -4.56 -4.99 -4.49 -3.88 -3.67 -3.93 -4.18 -3.76 -4.06

Monthly Mean Water Level 1979 – 2005 - 8.0

- 6.0

10.0 1985

1990199520002005

WATER LEVEL BELOW

LAND SURFACE, IN FEET

- 4.0

- 2.0

0.0

2.0

4.0

6.0

8.0

Negative value indicates water level above land surface

54  USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Appendix C 55

Lower Floridan aquifer

2005 Calendar Year

310818081294201 Site Name: 34H391

" o Latitude: 31 ' o 08 ' 18 Longitude: 081 29 42" GLYNN Period of Record: 1975 – 2005

Well Depth: 1,158 feet Datum: 7.13 feet NGVD29 Well Diameter: 4.00 inches

Daily Mean Water Level -13.0

-12.5

-12.0

-11.5

-11.0

-10.5

-10.0

- 9.5

- 9.0

WATER LEVEL BELO

W

LAND SURFACE , IN FEET

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1975 – 2005

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

Monthly Water-Level Statistics 2005

-15

-10

- 5

0

5

WATER LEVEL BELO

W

LAND SURFACE, IN FEET Mean -11.37 -11.28 -11.05 -11.22 -11.89 -10.70 -10.21 -10.15 -10.76 -11.05 -10.87 -11.17

Max -10.73 -11.03 -10.65 -10.71 -11.25 -9.08 -9.62 -9.65 -10.43 -10.46 -10.58 -10.65

Min -12.96 -11.52 -11.89 -11.62 -12.71 -11.91 -10.62 -10.71 -11.16 -11.52 -11.31 -11.54

1975 – 2005

Mean -5.64 -5.75 -5.93 -5.53 -4.67 -3.57 -3.36 -3.77 -4.23 -4.89 -4.88 -5.52

Max 0.33 0.55 0.72 0.86 1.93 2.83 2.96 2.83 2.90 1.96 1.44 1.45

Min -12.96 -11.71 -12.85 -12.34 -12.71 -11.91 -10.64 -10.79 -11.26 -11.65 -11.31 -11.54

Monthly Mean Water Level 1975 – 2005 -14

-10

- 6

- 2

2 WATER LEVEL BELO

W

LAND SURFACE, IN FEET

1975 1978 1981 1984 1987 1990 1993 1996 1999 2002 2005

Negative value indicates water level above land surface
1983

19851987198919911993199519971999200120032005

4

Lower Floridan aquifer

2005 Calendar Year

310901081284401 Site Name: 34H436

" o Latitude: 31 ' o 09' 01 Longitude: 081 28 44" GLYNN Period of Record: 1983 – 2005

Well Depth: 1,103 feet Datum: 6.62 feet NGVD29 Well Diameter: 4.00 inches

Daily Mean Water Level

-17.0

-16.5

-16.0

-15.5

-15.0

-14.5

-14.0

-13.5

-13.0

-12.5

-12.0

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 1983 – 2005

-20

-15

-10

- 5

0

5

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

Monthly Water-Level Statistics 2005

WATER LEVEL BELOW

LAND SURFACE, IN FEET

Mean -14.56 -14.40 -14.16 -14.26 -14.89 -13.88 -13.61 -13.42 -13.98 -14.20 -13.93 -14.23

Max -13.87 -14.13 -13.74 -13.77 -14.25 -12.95 -12.92 -12.91 -13.58 -13.58 -13.65 -13.71

Min -16.16 -14.68 -15.02 -14.60 -15.71 -14.90 -14.12 -13.97 -14.43 -14.71 -14.35 -14.63

1983 – 2005

Mean -9.37 -9.66 -9.66 -9.15 -8.12 -6.86 -6.44 -6.26 -6.87 -8.15 -8.55 -9.30

Max -2.70 -2.90 -4.10 -3.10 -2.70 0.30 0.90 1.10 1.30 -0.40 -1.30 -2.50

Min -16.16 -17.48 -15.97 -15.28 -15.71 -14.90 -14.12 -13.97 -14.43 -18.79 -14.95 -17.00

Monthly Mean Water Level 1983 – 2005 -20

WATER LEVEL BELOW

LAND SURFACE, IN FEET

-16

-12

- 8

- 4

0

Negative value indicates water level above land surface

WATER LEVEL BELOW

LAND SURFACE, IN FEET

56 USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Lower Floridan aquifer

2005 Calendar Year

310835081294501 Site Name: 34H495

" o Latitude: 31 ' o 08 ' 35 Longitude: 081 29 45" GLYNN Period of Record: 2001 – 2005

Well Depth: 2,720 feet Datum: 10 feet NGVD29 Well Diameter: 8 inches

Daily Mean Water Level -21.0

-20.5

-20.0

-19.5

-19.0

-18.5

-18.0

WATER LEVEL BELO

W

LAND SURFACE , IN FEET

WATER LEVEL BELOW

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 2001 – 2005

-25

-20

-15

-10

- 5

0

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

Monthly Water-Level Statistics 2005 LAND SURFACE, IN FEET

Mean -19.10 -19.24 -19.13 -19.36 -19.10 -18.72 -19.12 -19.29 -19.42 -19.55 -19.50 -19.62

Max -18.74 -18.90 -18.85 -19.06 -18.89 -18.61 -18.81 -19.20 -19.25 -19.31 -19.33 -19.28

Min -19.50 -19.47 -19.47 -19.69 -19.27 -18.93 -19.38 -19.45 -19.66 -19.82 -19.76 -20.00

2001 2005 –

Mean -15.14 -13.96 -14.15 -14.54 -13.98 -12.62 -13.42 -13.65 -15.21 -16.93 -16.10 -15.68

Max -8.92 -6.16 -7.42 -7.74 -5.44 -5.61 -6.26 -6.87 -7.54 -10.33 -7.26 -8.08

Min -19.50 -19.47 -19.47 -19.69 -19.27 -18.93 -19.38 -19.45 -19.66 -19.82 -19.76 -20.00

Monthly Mean Water Level 2001 – 2005 -22

-18

-14

-10

- 6

- 2

WATER LEVEL BELO

W

LAND SURFACE, IN FEET

2001 2002 2003 2004 2005

Negative value indicates water level above land surface

Appendix C 57
Lower Floridan aquifer

2005 Calendar Year

310835081294502 Site Name: 34H500

" o Latitude: 31 ' o 08' 35 Longitude: 081 29 45" GLYNN Period of Record: 2001 – 2005

Well Depth: 1,400 feet Datum: 10 feet NGVD29 Well Diameter: 8.0 inches

Daily Mean Water Level -19.0

-18.5

-18.0

-17.5

-17.0

-16.5

-16.0

-15.5

-15.0

-14.5

-14.0

WATER LEVEL BELO

W

LAND SURFACE , IN FEET

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

Monthly Mean for 2005 and Max, Mean, and Min Monthly Mean for 2001 – 2005

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

Monthly Water-Level Statistics 2005

-20

-15

-10

- 5

0

WATER LEVEL BELO

W

LAND SURFACE, IN FEET Mean -17.15 -16.88 -16.45 -16.38 -16.70 -15.56 -15.14 -14.91 -15.36 -15.48 -15.17 -15.34

Max -16.62 -16.58 -16.11 -16.03 -16.18 -14.96 -14.49 -14.50 -15.01 -14.97 -14.94 -14.88

Min -18.48 -17.18 -17.10 -16.62 -17.35 -16.57 -15.57 -15.35 -15.72 -15.91 -15.52 -15.69

2001 – 2005

Mean -14.45 -13.53 -13.50 -13.73 -13.34 -11.45 -11.69 -12.05 -13.64 -14.78 -14.43 -14.48

Max -8.73 -5.93 -6.20 -5.75 -4.33 -4.71 -6.02 -6.72 -7.68 -11.41 -8.07 -8.27

Min -18.48 -18.37 -18.26 -17.95 -17.35 -16.57 -16.08 -15.35 -16.45 -16.23 -16.52 -16.99

Monthly Mean Water Level 2001 – 2005 -20

-16

-12

- 8

- 4

WATER LEVEL BELO

W

LAND SURFACE, IN FEET

2001 2002 2003 2004 2005

Negative value indicates water level above land surface

58  USGS Georgia WSC and City of Brunswick–Glynn County Cooperative Water Program
Manuscript approved for publication, December 4, 2006

Prepared by USGS Georgia Water Science Center

Edited by Patricia L. Nobles

Graphics by Bonnie J. Turcott

For more information concerning the research in this report, contact 

USGS Georgia Water Science Center, Atlanta, 

telephone: 770-903-9100