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Watershed Data Management (WDM) Database for Salt 

Creek Streamflow Simulation, DuPage County, Illinois

By Elizabeth A. Murphy and Audrey L. Ishii

Prepared in cooperation with the 

DuPage County Department of Engineering, Stormwater Management Division

Open-File Report 2006–1248

U.S. Department of the Interior

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

DIRK KEMPTHORNE, Secretary

U.S. Geological Survey

Mark D. Myers, Director

U.S. Geological Survey, Reston, Virginia: 2006

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Suggested citation:

Murphy, E.A., and Ishii, A.L., 2006, Watershed Data Management (WDM) database for Salt Creek streamflow simulation, DuPage County, Illinois: U.S. Geological Survey Open-File Report 2006–1248, 34 p.
Contents

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

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

Watershed Data Management (WDM) Database....................................................................................1

Database Numbering Scheme ...........................................................................................................3

Precipitation Data.................................................................................................................................4

Water Years 1997−2000 ...............................................................................................................4

Water Years 2001−04 ...................................................................................................................8

Other Meteorologic Data.....................................................................................................................8

Hydrologic Data.....................................................................................................................................8

Summary..........................................................................................................................................................8

References Cited............................................................................................................................................9

Appendix 1. Dataset attributes for the SEP04.WDM Watershed Data Management database.....12

Appendix 2. Descriptions of estimated data periods in the SEP04.WDM Watershed Data 

Management database .................................................................................................................24

Figure

1. Map showing location of the Salt Creek watershed and data-collection sites in and 

near DuPage County, Illinois.......................................................................................................2

Tables

1. Description of dataset numbering system for the data in the SEP04.WDM Watershed 

Data Management database. .....................................................................................................3

2. List of datasets in the SEP04.WDM Watershed Data Management database...................5

3. Characteristics of selected meteorologic data observed in and near DuPage County, 

Ill., stored in quality-assured/quality-controlled SEP04.WDM Watershed Data Management database...............................................................................................................................7

4. Characteristics of hydrologic data observed in DuPage County, Ill., stored in SEP04.

WDM Watershed Data Management database......................................................................9

iii
Conversion Factors, Abbreviations, and Datums

Multiply By To obtain

Length

inch (in.) 25.4 millimeter (mm)

foot (ft) 0.3048 meter (m)

mile (mi) 1.609 kilometer (km)

Area

square mile (mi2) 2.590 square kilometer (km2) 

Flow rate

cubic foot per second (ft3/s) 0.02832 cubic meter per second (m3/s)

inch per hour (in/h) 0.0254 meter per hour (m/h)

Energy flux density

Langleys per hour (Lg/h) 11.63 Watts per square meter (W/m2)

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

 °C=(°F-32)/1.8

iv
Abstract

The U.S. Geological Survey (USGS), in cooperation 

with DuPage County Department of Engineering, Stormwater 

Management Division, maintains a database of hourly meteorologic and hydrologic data for use in a near real-time streamflow simulation system, which assists in the management and 

operation of reservoirs and other flood-control structures in the 

Salt Creek watershed in DuPage County, Illinois. The majority of the precipitation data are collected from a tipping-bucket 

rain-gage network located in and near DuPage County. The 

other meteorologic data (wind speed, solar radiation, air temperature, and dewpoint temperature) are collected at Argonne 

National Laboratory in Argonne, Illinois. Potential evapotranspiration is computed from the meteorologic data. The 

hydrologic data (discharge and stage) are collected at USGS 

streamflow-gaging stations in DuPage County. These data are 

stored in a Watershed Data Management (WDM) database.

This report describes a version of the WDM database that 

was quality-assured and quality-controlled annually to ensure 

the datasets were complete and accurate. This version of the 

WDM database contains data from January 1, 1997, through 

September 30, 2004, and is named SEP04.WDM. This report 

provides a record of time periods of poor data for each precipitation dataset and describes methods used to estimate the data 

for the periods when data were missing, flawed, or snowfallaffected. The precipitation dataset data-filling process was 

changed in 2001, and both processes are described. The other 

meteorologic and hydrologic datasets in the database are fully 

described in the annual U.S. Geological Survey Water Data 

Report for Illinois and, therefore, are described in less detail 

than the precipitation datasets in this report.

Introduction

The U.S. Geological Survey (USGS), in cooperation 

with DuPage County Department of Engineering, Stormwater 

Management Division, maintains a database of hourly meteorologic and hydrologic data for use in a near real-time streamflow simulation system, which assists in the management and 

operation of reservoirs and other flood-control structures in the 

Salt Creek watershed in DuPage County, Illinois. The Hydrological Simulation Program-FORTRAN (HSPF) hydrologic 

model (Bicknell and others, 2000) and Full Equations (FEQ) 

hydraulic model (Franz and Melching, 1997) are currently 

(2006) used by the USGS and DuPage County to develop 

simulations of the watershed rainfall runoff and routed streamflow, respectively, at a 1-hour time step. The meteorologic 

and hydrologic data are collected at various sites (fig.1). The 

precipitation data are from a watershed- and county-wide 

network of real-time tipping-bucket rain gages maintained by 

the USGS and DuPage County. The other meteorologic data 

(wind speed, solar radiation, air temperature, and dewpoint 

temperature) are from the Argonne National Laboratory 

located in Argonne, Illinois. Potential evapotranspiration is 

computed from the meteorologic data according to the method 

described in Murphy (2005). The hydrologic data are from 

both USGS stage and discharge gages and DuPage County 

stage gages. These data, which are provisional and subject to 

change, are stored in a Watershed Data Management (WDM) 

database that is updated at least weekly by USGS staff. The 

provisional data may be missing or flawed because of equipment malfunctions or other problems, so the WDM database 

is updated and corrected with quality-assured and qualitycontrolled (QA/QC) data annually. This update is done to 

maintain a record of the data in a model-compatible format 

and for studying historical storms. Although this database 

was compiled for the Salt Creek watershed, the data could be 

used in other hydrologic models in northeastern Illinois or for 

scientists studying rain distribution or climate in the area. 

This report describes the data sources and data organization used to create the QA/QC version of the WDM database. 

The estimation of missing or inaccurate precipitation data is 

described. The QA/QC procedures for the other meteorologic 

and hydrologic data are given in the annual USGS Water 

Data Report (WDR) for Illinois (Cutshaw and others, 2004) 

and will not be repeated in this report. The QA/QC database 

discussed in this document encompasses the period from 

January 1, 1997, through September 30, 2004, and is named 

the SEP04.WDM. 

Watershed Data Management (WDM) 

Database

The Watershed Data Management database is a binary, 

direct-access electronic file (Flynn and others, 1995). It was 

Watershed Data Management (WDM) Database for Salt 

Creek Streamflow Simulation, DuPage County, Illinois

By Elizabeth A. Murphy and Audrey L. Ishii
West

Spring

Salt

Creek

Brook

Sugar Cr

East

Kress Creek

River

Branch

Branch

DuPage

0

Base from U.S. Geological Survey 1:100,000 digital data

Albers Equal-Area projection, standard parallels 33° and 45°, central meridian -89° 1 2 3 4 5 KILOMETERS

0 1 2 3 4 5 MILES

88o22’30”

42o07’30”

42o52’30”

42o45’30”

42o

88o15’ 88o07’30” 88o 87o52’30”

Area

shown on map

Illinois

Index

map

U.S. Geological Survey stream gage and identifier

Du Page County stream gage and identifier

U.S. Geological Survey stand-alone rain gage and identifier

Argonne National Latoratory

O’Hare International Airport

St. Charles

St. Charles

Argonne

O’Hare

A

70 B

C

50 23

29

E D

28

14 F

87 G

64

85

I J

H

86

45

Lake County

Cook County

Kane County Du Page County

Kendall County Will County

Boundary

of watershed

EXPLANATION

Figure 1. Location of the Salt Creek watershed and data-collection sites in and near DuPage County, Illinois.

 Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois
developed by the USGS to be used with hydrologic and waterquality models and analyses. Data within the WDM is stored 

in datasets. WDM databases can be accessed with the ANNIE 

computer program (Flynn and others, 1995) or with the 

GenScn (Generation and Analysis of Model Simulation 

Scenarios) computer program (Kittle and others, 1998). The 

SEP04.WDM database contains meteorologic and hydrologic 

data collected in and near DuPage County, Illinois. The data 

organization, sources, and QA/QC procedures are discussed 

below. The precipitation data are described in the most 

detail because the other meteorologic and hydrologic data are 

described in the Illinois WDR (Cutshaw and others, 2004). 

Database Numbering Scheme

To aid in identifying the contents of WDM datasets, dataset numbers (DSNs) are assigned in a systematic order. The 

DSNs are limited to four digits in the Hydrological Simulation 

Program-FORTRAN (HSPF), which uses the WDM. Up to 

32,000 datasets are allowed in the WDM, but access to these 

datasets requires a direct-access computer program such as 

ANNIE (Flynn and others, 1995). In the SEP04.WDM, all 

DSNs are between 1 and 7019.

The data are numbered in the WDM according to data 

type and location. Generally, the different data types are 

grouped into series with the last two digits used to indicate 

location (table 1). For meteorologic data, the last two digits indicate the station identification of the data source. For 

example, the dataset numbers from 100 to 199 are for precipitation. The last two digits are based on the DuPage County 

local site identifier for the rain gages (fig. 1). In addition to 

the hourly meteorologic data, the SEP04.WDM contains data 

flags describing the meteorologic data. The last two digits 

of the flag files are 10. These data flags are described in the 

WDR (Cutshaw and others, 2004). 

Table 1. Description of dataset numbering system for the data in the SEP04.WDM Watershed Data 

Management database. 

[IDCON, identification of data type; ELEV, elevation; PREC, precipitation; EVAP, evapotranspiration; TEMP, temperature; DEWP, dewpoint; SRAD, solar radiation; NEXRAD, Next Generation Radar; --, not used to store data; ISUR, 

impervious runoff; PERO, pervious runoff; The impervious and pervious runoff datasets are available for calculations 

made by the hydrologic model but do not contain data.]

Dataset numbers Data type IDCON attribute

General data

1–10 Datums ELEV

11–99 -- --

Meteorologic data

100–199 Precipitation from tipping-bucket gages PREC

200–299 Potential evapotranspiration EVAP

300–399 Wind WIND

400–499 Temperature TEMP

500–599 Dewpoint DEWP

600–699 Solar radiation SRAD

700–799 Open for temporary analysis datasets various

800–899 Computed NEXRAD precipitation PREC

900–1099 -- --

1100–1199 Precipitation from weighing-bucket gages PREC

Hydrologic data

2000–3999 Discharge FLOW

4000–4999 Water-surface elevation from USGS gages ELEV

5000–5999 Water-surface elevation from DuPage County gages ELEV

6000–6999 Hydrologic model output ISUR/PERO

7000–7999 Simulated flow components various

8000–9999 -- --

Watershed Data Management (WDM) Database 
 For hydrologic data, the first two digits of the DSN 

indicate the type and location of the data, and the third and 

fourth digits are 00 if the data are observed. There are a few 

exceptions to the observed data label of 00. One exception is 

data recorded from multiple gages at the same location. Currently (2006), there are two locations with data from multiple 

gages—the DuPage County admittance and the ultrasonic 

water-surface elevation gages at Irving Park Road and Harger 

Road. The last two digits for these datasets are 00 for the 

admittance gages and 99 for the ultrasonic gages. Another 

exception is two gages that have data stored at a 15-minute 

time step in addition to the hour time step dataset. The datasets for these two gages have 01 as the last two digits. The 

complete list of datasets in SEP04.WDM is given in table 2, 

and a list of dataset attributes is given in Appendix 1.

As can be seen from table 2, the SEP04.WDM contains 

many datasets that are not part of the annual QA/QC process. These datasets have been created in the WDM for data 

analyses or for convenience of data processing. Datasets 2–5 

contain a constant arithmetic value used to generate a datum 

for the water-surface elevations. Datasets 107, 707, 801–809, 

and 1107 are used in comparisons of precipitation data. 

Datasets 4600–5699 are for stage data collected by DuPage 

County, and datasets 6107–7019 are for model simulation 

outputs for reviewing model operations. 

Precipitation Data

The source of precipitation data in the QA/QC WDM is 

the USGS/DuPage County real-time flood-warning rain-gage 

network. The real-time flood-warning rain-gage network 

contains seven rain gages in the Salt Creek watershed (14, 

28, 29, 45, 50, 64, and 70; fig. 1) and two gages (23 and 85; 

fig.1) located on the periphery of the watershed. The real-time 

flood-warning rain-gage network consists of 6-, 8-, and 12-in. 

diameter tipping-bucket rain gages. A tipping-bucket rain 

gage is set to tip when 0.01 in. of rain has been collected in the 

gage. Some of the gages in the network are heated allowing 

them to record snowfall amounts (table 3). The rain gages 

have radio telemetry, which transmits the data to a DuPage 

County facility at a 5-minute time step. Two additional rain 

gages (86 and 87; fig.1) in the watershed are run as basic data 

network gages. These gages do not have radio telemetry and, 

instead, transmit data over a telephone line.

Most of the radio-telemetered rain gages also have an 

onsite datalogger that records the data. Files from the datalogger are downloaded during quarterly site visits. Data collected 

with a datalogger are generally more reliable because transmission failures are avoided. Since water year 2001, the data 

published in the annual WDR (Cutshaw and others, 2004) 

and stored in the QA/QC WDM have been based primarily on 

the data collected with the datalogger. When the datalogger 

is missing data, radio-transmitted data are used as a backup 

record at the gages. Missing data are filled with data from a 

nearby gage if there is no backup record available at the gage. 

The rain gage at Spring Creek Reservoir near Bloomingdale, 

Ill. (number 50; fig. 1) transmits data through the radio only 

and has no datalogger. Missing data from this gage must be 

estimated from nearby gages. 

The rain-gage network data were checked for accuracy 

and processed for publication in the WDR. As part of the 

annual data-checking process, missing data were estimated 

from nearby gages and snowfall-affected data were flagged. 

Snowfall-affected data were flagged for both heated and 

unheated rain gages. Snowfall-affected data were flagged 

because rain gages inaccurately record precipitation data at 

temperatures below freezing. Frozen precipitation, usually in 

the form of snow, accumulates in the funnel of unheated rain 

gages. This frozen precipitation is measured when it melts. 

Wind can blow snow out of the rain gage before it can melt, 

leaving some precipitation unmeasured. The determination 

of which data were snowfall-affected took into consideration 

air temperature at the O’Hare meteorologic station (fig. 1), 

gage placement, and the amount of precipitation observed at 

heated gages in the network. In addition to the documentation 

published in the WDR, Appendix 2 contains detailed records 

of which data were used for the missing data estimation 

(table 2–1) and to fill the snowfall-affected periods (tables 2–2 

and 2–3). 

After the precipitation data were checked, missing data 

estimated, and snowfall-affected data flagged, a unit-value file 

was created. The unit-value (uv) files contain the date, time, 

and amount of rain recorded. The data are recorded when 

there is a tip at the gage, so there can be consecutive minutes 

with tips recorded and large periods of time when no tips are 

recorded. This time-step irregularity of the uv files made 

reading these data directly into the WDM difficult. A program 

developed by the USGS, unitvaluesummation.exe, was used to 

create a data file at a uniform hourly time step from the raw uv 

files (Tim Straub, U.S. Geological Survey, written commun., 

2004). 

Water Years 1997–2000

For water years1 1997–2000, the radio-transmitted data 

were used as the basis for the QA/QC WDM and, when available, the backup datalogger data were substituted for missing 

hourly data in the WDM. When no backup data were available, the dataset was filled with data from a nearby gage. The 

record of missing periods for the gages and the gage used to 

fill in the missing period is given in table 2–1 (Appendix 2). 

In the WDM, for the water years 1997–2000, the snowfall-affected data were replaced with data from heated gages 

outside the DuPage network, specifically, the O’Hare and 

Argonne heated gages. The days with snowfall-affected 

data usually were determined by which days had snow at the 

O’Hare gage (U.S. Department of Commerce, 1997–2000). A 

record of periods with snowfall for 1997–2000 can be found in 

table 2–2 (Appendix 2). 

1

A water year (WY) is the 12-month period from October 1 through September 30 and is designated by the calendar year in which it ends and includes 

9 of 12 months. For example, WY 2004 is from October 1, 2003, through 

September 30, 2004.

 Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois
Watershed Data Management (WDM) Database 

Table 2. List of datasets in the SEP04.WDM Watershed Data Management database.

[DSN, dataset number; STANAM, station name; TSTYPE, type of data; ft, feet; ELEV, elevation; in., inch; PREC, precipitation; WWTF, wastewater-treatment facility; EVAP, evapotranspiration; deg F, degrees Fahrenheit; TEMP, temperature; 

DEWP, dewpoint; SRAD, solar radiation; cfs, cubic feet per second; ADMT, admittance sensor; ULTR, ultrasonic sensor; 

ISUR, impervious runoff; in/h, inch per hour; mi2, square mile; PERO, pervious runoff; SURO, surface outflow; IFWO, interflow outflow; PET, potential evapotranspiration; in/d, inch per day; ET, evapotranspiration; TAET, simulation evapotranspiration; UZS, upper zone storage; LZS, lower zone storage; AGWS, ground-water storage at start]

DSN STANAM TSTYPE

2 Dummy datum (600 ft) ELEV

3 Dummy datum (600 ft) ELEV

4 Oakbrook datum (600 ft) 15 minutes ELEV

5 Elmhurst datum (652.65 ft) 15 minutes ELEV

107 Argonne tipping-bucket prec (0.01 in.) PREC

114 Elmhurst Quarry at Elmhurst (0.01 in.) PREC

123 Bloomingdale Lift Station (0.01 in.) PREC

128 Addison WWTF (0.01 in.) PREC

129 Wood Dale WWTF at Wood Dale (0.01 in.) PREC

145 Busse Woods at Elk Grove Village (0.01 in.) PREC

150 Spring Creek Reservoir near Bloomingdale PREC

164 Oak Brook Well at Oakbrook (0.01 in.) PREC

170 Schaumburg Public Works at Schaumburg PREC

185 Westmont Water Department at Westmont PREC

186 22nd Street at Oak Brook (05531410) PREC

187 Elmhurst Prairie Path (05531300) PREC

207 Argonne evap-unadjusted wind (0.001 in.) EVAP

307 Unadjusted argonne hourly wind (miles) WIND

310 Argonne hourly wind flag FLAG

407 Argonne hourly temp (deg F) TEMP

410 Argonne hourly temp flag FLAG

507 Argonne hourly dewpoint (deg F) DEWP

510 Argonne dewpoint flag FLAG

607 Argonne hourly solar radiation (Langleys) SRAD

610 Argonne hourly solar radiation flag FLAG

707 Disaggregated precipitation (daily to hourly) PREC

801 NEXRAD hourly average for Lower Salt PREC

802 NEXRAD hourly average for Upper Salt PREC

803 Upper Salt PREC

804 Lower Salt PREC

805 NEXRAD hourly average for Spring Brook PREC

806 NEXRAD hourly average for Neck of Lower Salt PREC

807 NEXRAD hourly average Neck of Lower Salt and Spring Brook PREC

808 NEXRAD hourly average Upper Salt—gage 170 PREC

 
 Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

Table 2. List of datasets in the SEP04.WDM Watershed Data Management database.—Continued

[DSN, dataset number; STANAM, station name; TSTYPE, type of data; ft, feet; ELEV, elevation; in., inch; PREC, precipitation; WWTF, wastewater-treatment facility; EVAP, evapotranspiration; deg F, degrees Fahrenheit; TEMP, temperature; 

DEWP, dewpoint; SRAD, solar radiation; cfs, cubic feet per second; ADMT, admittance sensor; ULTR, ultrasonic sensor; 

ISUR, impervious runoff; in/h, inch per hour; mi2, square mile; PERO, pervious runoff; SURO, surface outflow; IFWO, interflow outflow; PET, potential evapotranspiration; in/d, inch per day; ET, evapotranspiration; TAET, simulation evapotranspiration; UZS, upper zone storage; LZS, lower zone storage; AGWS, ground-water storage at start]

DSN STANAM TSTYPE

809 NEXRAD hourly average Upper Salt—gage 145 PREC

1107 Argonne hourly precipitation (hundredths) PREC

2100 Discharge at Western Springs (cfs) FLOW

2107 Discharge at Western Springs (simulated) FLOW

2500 Discharge at Elmhurst Prairie Path (cfs) FLOW

2800 Discharge at Elk Grove Village (cfs) FLOW

2900 Discharge at Rolling Meadows (cfs) FLOW

4100 Water-surface elevation at Western Springs ELEV

4200 Water-surface elevation at Oak Brook ELEV

4201 Oakbrook 15-minute water-surface elevation ELEV

4500 Water-surface elevation at Elmhurst ELEV

4501 Elmhurst 15-minute water-surface elevation ELEV

4600 Water-surfurce elevation at Wood Dale ELEV

4800 Water-surface elevation nr Elk Grove Village ELEV

4900 Water-surface elevation at Rolling Meadows ELEV

5300 Water-surface elevation at Harger Road ADMT ELEV

5399 Water-surface elevation at Harger Road ULTR ELEV

5400 Water-surface elevation at Quarry ELEV

5600 Water-surface elevation at Irving Pk Rd ADMT ELEV

5699 Water-surface elevation at Irving Pk Rd ULTR ELEV

6107 Impervious runoff ISUR

6207 Flat grass runoff (in/h*mi2

) PERO

6307 Moderate grass runoff (in/h*mi2

) PERO

6407 Steep grass runoff (in/h*mi2

) PERO

6507 Forest runoff (in/h*mi2

) PERO

6607 Agriculture runoff (in/h*mi2

) PERO

7012 Surface outflow (in/h*mi2

) SURO

7013 Interflow outflow (in/h*mi2

) IFWO

7014 PET (in/d*mi2

) PET

7015 Simulated ET (in/d*mi2

) TAET

7016 Upper zone storage (in.*mi2

) UZS

7017 Lower zone storage (in.*mi2

) LZS

7018 Ground-water storage at start (in.) AGWS

7019 Simulated snow depth (in.) Snow

 
Watershed Data Management (WDM) Database 



Table 3. Characteristics of selected meteorologic data observed in and near DuPage County, Ill., stored in quality-assured/quality-controlled SEP04.WDM Watershed Data Management database.[USGS, U.S. Geological Survey; Lat, latitude and Long, longitude, in degrees ( o ) minutes (’) seconds (”); --, not applicable; o F, degrees Fahrenheit; WDM, Watershed Data Management; WWTF, wastewater-treatment facility]

Site identifier 

(fig.1) Data type USGS station number Units of measurement Location of gage Dataset number

Period of record in 

SEP04.WDM database 

(month/day/year)

Argonne Precipitation

Wind

----

0.01 inchesmiles per hour

Argonne National LaboratoryLat: 41o42’06” Long: 87o59’46”

107307

01/01/96–09/30/04

Temperature -- o F 407Dewpoint -- o F 507

Solar radiation -- Langleys per hour 607

14 Precipitation 415356087575000 0.01 inches Elmhurst Quarry at Elmhurst, Ill. 

Lat: 41o53’56” Long: 87o57’50”

114 07/18/97–09/30/04 

Heated since 10/07/03

23 Precipitation 415651088051900 0.01 inches Bloomingdale Lift Station at Bloomingdale, Ill.

Lat: 41o56’51” Long: 88o05’19”

123 10/01/00–09/30/04 

Heated since 10/06/03

28 Precipitation 415518087583000 0.01 inches Addison WWTF at Addison, Ill.

Lat: 41o55’18” Long: 87o58’30”

128 08/01/98–09/30/04 

Not heated

29 Precipitation 415751087591000 0.01 inches Wood Dale WWTF at Wood Dale, Ill.

Lat: 41o57’51” Long: 87o59’10”

129 07/01/97–09/30/04 

Heated since 05/20/03

45 Precipitation 420057088001700 0.01 inches Busse Woods at Elk Grove Village, Ill.

Lat: 42o00’57” Long: 88o00’17”

145 07/18/97–09/30/04 

Not heated

50 Precipitation 415737088031100 0.01 Inches Spring Creek Reservoir near Bloomingdale, Ill.

Lat: 41o57’37” Long: 88o03’11”

150 07/18/97–09/30/04 

Not heated

64 Precipitation 415037087581700 0.01 inches Oak Brook Well at Oak Brook, Ill.

Lat: 41o50’37” Long: 87o58’17”

164 07/18/97–09/30/04 

Heated since 10/29/99

70 Precipitation 420052088034200 0.01 inches Schaumburg Public Works at Schaumburg, Ill.

Lat: 42o00’52” Long: 88o03’42”

170 07/18/97–09/30/04 

Heated since 11/14/01

85 Precipitation 414747087582700 0.01 inches Westmont Water Department at Westmont, Ill.

Lat: 41o47’47” Long: 87o58’27”

185 10/01/00–09/30/04 

Not heated

86 Precipitation 05531410 0.01 inches Salt Creek at 22nd Street at Oak Brook, Ill.

Lat: 41o50’50” Long: 87o56’13”

186 07/18/97–09/30/04 

Not heated

87 Precipitation 05531300 0.01 inches Salt Creek at Elmhurst, Ill.

Lat: 41o53’10” Long: 87o57’33”

187 07/18/97–09/30/04 

Not heated
Water Years 2001–04

For water years 2001–04, the DuPage rain-gage network 

data stored on the dataloggers were used as the basis for the 

QA/QC WDM and any missing unit values of precipitation 

(one value every 5 minutes) were estimated (David Fazio, U.S. 

Geological Survey, oral commun., 2004). For water years 

2001–04, the estimated values were included in the hourly 

summations stored in the WDM. As a result, the precipitation data in the WDM for these water years include estimated 

values. Because estimated data in the WDM are not flagged, 

it is necessary to refer to table 2–1 to determine the periods for 

which data are estimated. 

In the WDM, for water years 2001–04, the snowfallaffected data values were left as recorded at the gage, not 

filled with data from the O’Hare and Argonne heated gages as 

they had been in previous years. As a result, the data in the 

WDM for these water years include snowfall-affected data 

values from both heated and unheated gages (see table 3 for 

which gages are heated). The snowfall-affected data are given 

in table 2–3 for all but two basic-data rain gages; Salt Creek 

at 22nd Street at Oakbrook, Ill. (number 86 in figure 1) and 

Salt Creek at Elmhurst, Ill. (number 87 in figure 1) (David 

Fazio, U.S. Geological Survey, oral commun., 2004). These 

two gages are operated as part of the regular data-collection 

network; consequently, no determination of snowfall-affected 

data has been made.

Other Meteorologic Data

The Department of Energy (DOE) facility, Argonne 

National Laboratory (Argonne), was the main source of 

meteorologic data other than precipitation (fig. 1). The temperature, dewpoint temperature, wind speed, and solar radiation data were obtained from the Argonne Web site (Argonne 

National Laboratory, 2005). Any missing data were estimated to provide a full and accurate data record in the WDM 

database. The data through the end of water year 2004 were 

quality-controlled by Argonne staff (Argonne National Laboratory, 2005). These data were then adjusted to account for 

different data-collection methods at the Argonne station over 

the period of record, and missing values were estimated from 

adjusted data derived from the St. Charles and O’Hare meteorologic stations (Tom Over, U.S. Geological Survey, written 

commun., 2004). To make the adjustment, the meteorologic 

data from 1989–95 at Argonne were compared to the data 

for the same period at O’Hare, and a relation was established 

between the two datasets. This relation was used as a guide to 

adjust the Argonne data from 1949–88 using the O’Hare data 

for the same period. The filled and adjusted meteorologic data 

were used to compute potential evapotranspiration with the 

Lamoreux Potential Evapotranspiration (LXPET) program as 

described by Murphy (2005).

Hydrologic Data

In addition to the meteorologic data used as inputs to the 

HSPF model, the WDM contains observed hydrologic data 

(table 4). These data are observed discharge and water-surface 

elevation (stage) datasets used to compare with the simulated 

discharges and water-surface elevations generated by HSPF 

and FEQ, respectively. These datasets include some interpolated values. Periods of interpolated values are documented 

in the annual WDR (Cutshaw and others, 2004). Discharge 

data measured at four USGS gages are stored in the WDM. 

The water-surface elevation was measured at four locations 

by USGS gages, at three locations by DuPage County gages, 

and at one location by both USGS and DuPage County gages. 

DuPage County has two types of sensors, admittance and 

ultrasonic, at each of their gage locations (Chris Vonhamme, 

DuPage County Department of Engineering, Stormwater 

Management Division, oral commun., 1997). The data from 

the DuPage County-maintained gages were not qualityassured or quality-controlled by the USGS. These data were 

not published in the WDR, and the raw data were archived 

in the SEP04.WDM only as a reference for DuPage County. 

Although the WDM contains a dataset for discharge at Salt 

Creek at Elk Grove Village, discharge data were not qualityassured and published prior to water year 2005. Prior to water 

year 2005, these discharge data were computed with a provisional rating and used for operational purposes only.

Summary

The U.S. Geological Survey (USGS), in cooperation 

with DuPage County Department of Engineering, Stormwater 

Management Division, maintains a database of hourly meteorologic and hydrologic data for use in a near real-time streamflow simulation system, which assists in the management and 

operation of reservoirs and other flood-control structures in the 

Salt Creek watershed in DuPage County, Illinois. The precipitation data are from a watershed- and county-wide, network of 

real-time tipping-bucket rain gages maintained by the USGS 

and DuPage County. The other meteorologic data (wind 

speed, solar radiation, air temperature, and dewpoint temperature) are from the Argonne National Laboratory located in 

Argonne, Illinois. Potential evapotranspiration is computed 

from the meteorologic data according to the method described 

in Murphy (2005). The hydrologic data are from both USGS 

stage and discharge gages and DuPage County stage gages. 

Even though this database was compiled for the Salt Creek 

watershed, the data could be used in other hydrologic models 

in northeastern Illinois or for scientists studying rain distribution or climate in the area.

This database is updated annually with quality-assured 

and quality-controlled (QA/QC) data. A version of the 

database that contains QA/QC data for the period January 1, 

1997, through September 30, 2004, is described in this report 

 Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois
and is named SEP04.WDM. As part of the QA/QC process, 

the SEP04.WDM precipitation datasets were filled when data 

were missing and corrected during periods of snowfall. The 

missing data were most often filled from backup datalogger 

records but sometimes were filled with data from a nearby 

rain gage. Periods of snowfall were flagged using records 

from heated gages and air temperature observations at O’Hare 

Airport. Snowfall-affected data were processed two different ways in the database; for water years 1997–2000, the 

snowfall-affected data were replaced with data from a heated 

gage outside the network, and for water years 2001–04, the 

snowfall-affected data were left as recorded at the gage. 

The treatment of missing and snow-affected data in the 

precipitation datasets is the focus of this report; the other 

meteorologic and hydrologic datasets were fully described 

in the annual USGS Water Data Report and, therefore, are 

described in less detail in this report. The non-precipitation 

meteorologic data (wind speed, solar radiation, air temperature, and dewpoint temperature) in the database are collected 

at Argonne National Laboratory located in Argonne, Illinois, 

and missing data are filled from meteorologic stations at St. 

Charles, Illinois, and O’Hare Airport, Chicago, Illinois. The 

water-surface elevation (stage) and discharge data for Salt 

Creek are collected by the USGS at four locations, and the 

stage is collected by DuPage County at two additional locations. 

References Cited

Argonne National Laboratory, 2005, Meteorologic data, 

accessed on September 15, 2005, at URL http://gonzalo.

er.anl.gov/ANLMET/ 

Bicknell, B.R., Imhoff, J.C., Kittle, J.L., Jr., Jobes, T.H., and 

Donigian, A.S., Jr., 2000, Hydrological simulation program–FORTRAN (HSPF)—user’s manual for release 12: 

U.S. Environmental Protection Agency Research Laboratory, Athens, Ga., variously paginated.

Cutshaw, S.R., Mills, P.C., Hogan, J.L., and Fazio, D.J., 2004, 

Water resources data Illinois water year 2004 (includes 

historical data): U.S. Geological Survey Water-Data 

Report IL–04, CD ROM.

Flynn, K.M., Hummel, P.R., Lumb, A.M., and Kittle, J.L., 

Jr., 1995, User’s manual for ANNIE, version 2, a computer 

program for interactive hydrologic data management: U.S. 

Geological Survey Water-Resources Investigations 

Report 95–4085, 211 p.

References Cited 

Table 4. Characteristics of hydrologic data observed in DuPage County, Ill., stored in SEP04.WDM Watershed Data Management 

database.

[USGS, U.S. Geological Survey; IDCON, constituent identification attribute in Water Data Management (WDM) database; --, not applicable; ELEV, watersurface elevation; FLOW, discharge]

Site map 

identifier 

(fig. 1) 

Source of data Agency USGS station 

number Data type Period of record in SEP04.WDM

WDM database 

dataset number and 

IDCON

A Salt Creek at Rolling Meadows, Ill. 

(Algonquin Road)

USGS 05530990 Stage 

Discharge

01/01/1997–09/30/2004

01/01/1997–09/30/2004

4900-ELEV

2900-FLOW

B Salt Creek near Elk Grove Village, 

Ill. (Busse Woods Dam)

USGS 05531044 Stage 

Discharge

01/01/1997–09/30/2004

01/01/1997–09/30/2004

4800-ELEV

2800-FLOW

D Irving Park Road DuPage County -- Stage1

Stage

07/10/1997–09/30/2004

09/20/2001–09/30/2004

5600-ADMT

5699-ULTR

E Salt Creek at Wood Dale, Ill.

 (Irving Park Road)

USGS 05531175 Stage 01/01/1997–09/30/2004 4600-ELEV

F Elmhurst Quarry Road DuPage County -- Stage 07/10/1997–09/30/2004 5400-ELEV

G Salt Creek at Elmhurst, Ill.

 (Prairie Path)

USGS 05531300 Stage 

Discharge

01/01/1997–09/30/2004 4500-ELEV

2500-FLOW

H Harger Road DuPage County -- Stage 

Stage

07/10/1997–09/30/2004

09/20/2001–09/30/2004

5300-ADMT

5399-ULTR

I Salt Creek at 22nd Street at Oak 

Brook, Ill.

USGS 05531410 Stage 01/01/1997–09/30/2004 4200-ELEV

J Salt Creek at Western Springs

 (Wolf Road)

USGS 05531500 Stage

Discharge

01/01/1997–09/30/2004

01/01/1989–09/30/2004

4100-ELEV

2100-FLOW

1

DuPage County stage gages have both admittance and ultrasonic sensors. These sensors are designated by the IDCON attribute, ADMT and ULTR, respectively.
Franz, D.D., and Melching, C.S., 1997, Full Equations (FEQ) 

model for the solution of the full, dynamic equations of 

motion for one-dimensional unsteady flow in open channels and through control structures: U.S. Geological Survey 

Water-Resources Investigations Report 96–4240, 207 p., 

plus appendixes.

Kittle, J.L., Jr., Lumb, A.M., Hummel, P.R., Duda, P.B., and 

Gray, M.H., 1998, A tool for the generation and analysis 

of model simulation scenarios for watersheds (GenScn): 

U.S. Geological Survey Water-Resources Investigations 

Report 98–4134, 152 p.

Murphy, E.A., 2005, Comparison of potential evapotranspiration calculated by the LXPET (Lamoreux Potential 

Evapotranspiration) Program and by the WDMUtil (Watershed Data Management Utility) Program: U.S. Geological 

Survey Open-File Report 2005–1020, 20 p.

U.S. Department of Commerce, National Oceanic and Atmospheric Administration, 1997–2000, Climatological data, 

Illinois: Asheville, N.C., Environmental Data and Information Service (published monthly).

10 Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois
Appendixes
Appendix 1. Dataset attributes for the SEP04.WDM Watershed Data Management database

More information about these Watershed Data Management database attributes can be found in the following reference:

Flynn, K.M., Hummel, P.R., Lumb, A.M., and Kittle, J.L., Jr., 1995, User’s manual for ANNIE, version 2, a computer program 

for interactive hydrologic data management: U.S. Geological Survey Water-Resources Investigations Report 95–4085, 211 p.

12  Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

ATTRIBUTE DESCRIPTION

DATCRE Date the dataset was created (year, month, day, hour, and minute)

DATMOD Date the dataset was modified (year, month, day, hour, and minute)

TSTYPE Category of data; PREC, EVAP, WIND, ELEV, FLOW, etc. 

TGROUP Manner in which data are grouped in database

6 YEARS

5 MONTHS

Affects the speed of data access 

COMPFG 1 No compression

2 Compression—Should be used for precipitation data.

TSFORM Manner in which the data are assigned to the time step

1 MEAN

2 TOTAL

3 INSTANTANEOUS AT END OF TIME STEP 

TCODE Time step of the data

1 SECONDS

2 MINUTES

3 HOURS

4 DAYS

5 MONTHS

6 YEARS

TSSTEP 1 Time step in TCODE units

VBTIME 1 Time step is constant

TSBYR Base year- dataset can extend 100 years beyond the base year 

IDSCEN Scenario identification; ‘OBSERVED’ is used for observed data. 

IDCONS FLOW, ELEV, PREC, and others. Generally, the same as TSTYPE.

IDLOCN Location identifier-- The attribute must correspond exactly to a node on the map for the 

dataset to be available through the map. Datasets 2 and 3 do not have a location associated 

with them and are assigned <UNK> for unknown.

STAID Identification number, usually the gage number

STANAM Station name and information about the units used. The maximum width is 48 characters.

TSFILL 0.00 default value for periods between data—Reset to a large negative value for better definition of missing value.
Appendix 1 13

Attributes of DSN 2

 DATCRE : 20030407114739

 DATMOD : 20050915133508

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : <UNK>

 STANAM : dummy datum (600ft)

Attributes of DSN 3

 DATCRE : 20050621145813

 DATMOD : 20050915133508

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 1

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : <UNK>

 STANAM : dummy datum (600ft)

Attributes of DSN 4

 DATCRE : 20040805124234

 DATMOD : 20050915133457

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 1

 TSFORM : 3

 TCODE : 2

 TSSTEP : 15

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : OAKBROOK

 STANAM : Oakbrook datum (600ft) 15 min

Attributes of DSN 5

 DATCRE : 20040805124836

 DATMOD : 20050915133457

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 2

 TSSTEP : 15

 VBTIME : 2

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : ELMHURST

 STANAM : Elmhurst datum (652.65ft) 15 min

Attributes of DSN 107

 DATCRE : 20030407115257

 DATMOD : 20050915133456

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : ARGONNE

 STANAM : ARGONNE TIPPING BUCKET PREC (.01 IN)

Attributes of DSN 114

 DATCRE : 20030211085348

 DATMOD : 20050915133456

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : D45

 STANAM : ELMHURST QUARRY AT ELMHURST (.01 IN)

Attributes of DSN 123

 DATCRE : 20030106152802

 DATMOD : 20050915133456

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : BLOOMING

 STANAM : BLOOMINGDALE LIFT STATION (.01 IN)

 TSFILL : -9990.0

 STAID : 23

Attributes of DSN 128

 DATCRE : 20030211093407

 DATMOD : 20050915133456

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 2

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : ADDISON

 STANAM : ADDISON WWTP (.01 IN)

 STAID : 28

 TSFILL : -9990.0
14  Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

Attributes of DSN 129

 DATCRE : 20050113081137

 DATMOD : 20050915133456

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : WOODDALE

 STANAM : WOOD DALE WWTP AT WOOD DALE 

(0.01 IN)

 STAID : 29

Attributes of DSN 145

 DATCRE : 20020503151909

 DATMOD : 20050915133455

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 2

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : BUSSE WO

 STANAM : BUSSE WOODS AT ELK GROVE 

VILLAGE (.01 IN)

 ISTAID : 45

 TSFILL : -9990.0

 STAID : 45

Attributes of DSN 150

 DATCRE : 20020503151916

 DATMOD : 20050915133456

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 2

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : SPRINGCR

 STANAM : SPRING CREEK RESERVOIR NEAR

BLOOMINGDALE

 STAID : 50

 TSFILL : -9990.0

Attributes of DSN 164

 DATCRE : 20030211095023

 DATMOD : 20050915133455

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 2

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : OAKBROOK

 STANAM : OAK BROOK WELL AT OAKBROOK (.01 IN)

 STAID : 64

 TSFILL : -9990.0

Attributes of DSN 170

 DATCRE : 20020503151932

 DATMOD : 20050915133455

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 2

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : SCHAUMBU

 STANAM : SCHAUMBURG PUBLIC WORKS AT SCHAUMBURG

 ISTAID : 70

 TSFILL : -9990.0

 STAID : 70

Attributes of DSN 185

 DATCRE : 20020503152233

 DATMOD : 20050915133455

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 2

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : WESTMONT

 STANAM : WESTMONT WATER DEPT. AT WESTMONT

 ISTAID : 85

 TSFILL : -9990.0

 STAID : 85

Attributes of DSN 186

 DATCRE : 20030407142146

 DATMOD : 20050915133454

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : U84

 STANAM : 22ND STREET AT OAK BROOK (05531410)
Appendix 1 15

Attributes of DSN 187

 DATCRE : 20030407142242

 DATMOD : 20050915133454

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : D57

 STANAM : ELMHURST PRAIRIE PATH (05531300)

Attributes of DSN 207

 DATCRE : 20050113091003

 DATMOD : 20050915135005

 TSTYPE : EVAP

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1940

 IDSCEN : COMPUTED

 IDCONS : EVAP

 IDLOCN : ARGONNE

 STANAM : ARGONNE EVAP-UNADJUSTED WIND 

(0.001 in)

Attributes of DSN 307

 DATCRE : 20030204105557

 DATMOD : 20050915133452

 TSTYPE : WIND

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1940

 IDSCEN : OBSERVED

 IDCONS : WIND

 IDLOCN : ARGONNE

 STANAM : UNADJUSTED ARGONNE HOURLY 

WIND (MILES)

 TSFILL : -99.900

 STAID : ARGONNE

Attributes of DSN 310

 DATCRE : 20040303090812

 DATMOD : 20050915133508

 TSTYPE : FLAG

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1940

 IDSCEN : FLAG

 IDCONS : WIND

 IDLOCN : ARGONNE

 STANAM : ARGONNE HOURLY WIND FLAG

 TSFILL : -99.900

 STAID : WINDFLAG

Attributes of DSN 407

 DATCRE : 20030204105742

 DATMOD : 20050915133449

 TSTYPE : TEMP

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1940

 IDSCEN : OBSERVED

 IDCONS : TEMP

 IDLOCN : ARGONNE

 STANAM : ARGONNE HOURLY TEMP (DEG F)

 TSFILL : -99.900

 STAID : ARGONNE

Attributes of DSN 410

 DATCRE : 20040303090734

DATMOD : 20050915133508

 TSTYPE : FLAG

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1940

 IDSCEN : FLAG

 IDCONS : TEMP

 IDLOCN : ARGONNE

 STANAM : ARGONNE HOURLY TEMP FLAG

 TSFILL : -99.900

 STAID : TEMPFLAG

Attributes of DSN 507

 DATCRE : 20030204105819

 DATMOD : 20050915133446

 TSTYPE : DEWP

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1940

 IDSCEN : OBSERVED

 IDCONS : DEWP

 IDLOCN : ARGONNE

 STANAM : ARGONNE HOURLY DEWPOINT (deg F)

 TSFILL : -99.900

 STAID : ARGONNE

Attributes of DSN 510

 DATCRE : 20040303090851

 DATMOD : 20050915133508

 TSTYPE : FLAG

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1940

 IDSCEN : FLAG

 IDCONS : DEWP

 IDLOCN : ARGONNE

 STANAM : ARGONNE DEWPOINT FLAG
16  Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

 TSFILL : -99.900

 STAID : DEWPFLAG

Attributes of DSN 607

 DATCRE : 20030204110021

 DATMOD : 20050915133444

 TSTYPE : SRAD

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1940

 IDSCEN : OBSERVED

 IDCONS : SRAD

 IDLOCN : ARGONNE

 STANAM : ARGONNE HOURLY SOLAR RADIATION (LANGLEYS

 TSFILL : -99.900

 STAID : ARGONNE

Attributes of DSN 610

 DATCRE : 20040303090641

 DATMOD : 20050915133508

 TSTYPE : FLAG

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1940

 IDSCEN : FLAG

 IDCONS : SRAD

 IDLOCN : ARGONNE

 STANAM : ARGONNE HOURLY SOLAR RADIATION FLAG

 TSFILL : -99.900

 STAID : SRADFLAG

Attributes of DSN 707

 DATCRE : 20030116143614

 DATMOD : 20050915133507

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : COMPUTED

 IDCONS : PREC

 IDLOCN : ARGONNE

 STANAM : disaggregated precipitation (daily to hourly)

Attributes of DSN 801

 DATCRE : 20030501144051

 DATMOD : 20050915133502

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

IDSCEN : NEXRAD

 IDCONS : PREC

 IDLOCN : 801

 STANAM : NEXRAD HOURLY AVG FOR LOWSALT

 ISTAID : 4

 TSFILL : -99.900

 STAID : CELL01

Attributes of DSN 802

 DATCRE : 20030703114536

 DATMOD : 20050915133502

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : NEXRAD

 IDCONS : PREC

 IDLOCN : 802

 STANAM : NEXRAD HOURLY AVG FOR UPSALT

 ISTAID : 4

 TSFILL : -99.900

 STAID : CELL01

Attributes of DSN 803

 DATCRE : 20030501144056

 DATMOD : 20050915133502

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : NEXRAD

 IDCONS : PREC

 IDLOCN : 803

 STANAM : UPPERSALT

 ISTAID : 4

 TSFILL : -99.900

 STAID : CELL01

Attributes of DSN 804

 DATCRE : 20030501144100

 DATMOD : 20050915133502

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : NEXRAD

 IDCONS : PREC

 IDLOCN : 804

 STANAM : LOWSALT

 ISTAID : 4

 TSFILL : -99.900

 STAID : CELL01
Appendix 1 17

Attributes of DSN 805

 DATCRE : 20030501160137

 DATMOD : 20050915133502

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : NEXRAD

 IDCONS : PREC

 IDLOCN : 805

 STANAM : NEXRAD HOURLY AVG FOR SPRING 

BROOK

 ISTAID : 4

 TSFILL : -99.900

 STAID : CELL01

Attributes of DSN 806

 DATCRE : 20030501144104

 DATMOD : 20050915133503

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : NEXRAD

 IDCONS : PREC

 IDLOCN : 806

 STANAM : NEXRAD HOURLY AVG FOR NECK OF

LOWER SALT

 ISTAID : 4

 TSFILL : -99.900

 STAID : CELL01

Attributes of DSN 807

 DATCRE : 20030709124049

 DATMOD : 20050915133502

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : NEXRAD

 IDCONS : PREC

 IDLOCN : 807

 STANAM : NEXRAD HOURLY AVG- NECK L.

SALT & SPRING BRK

 ISTAID : 4

 TSFILL : -99.900

 STAID : CELL01

Attributes of DSN 808

 DATCRE : 20030501153238

 DATMOD : 20050915133502

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : NEXRAD

 IDCONS : PREC

 IDLOCN : 808

 STANAM : NEXRAD HOURLY AVG- UPPER SALT-gage170

 ISTAID : 4

 TSFILL : -99.900

 STAID : CELL01

Attributes of DSN 809

 DATCRE : 20030501153242

 DATMOD : 20050915133503

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : NEXRAD

 IDCONS : PREC

 IDLOCN : 809

 STANAM : NEXRAD HOURLY AVG- UPPER SALT -gage 145

 ISTAID : 4

 TSFILL : -99.900

 STAID : CELL01

Attributes of DSN 1107

 DATCRE : 20020423170605

 DATMOD : 20050915133507

 TSTYPE : PREC

 TGROUP : 6

 COMPFG : 1

 TSFORM : 2

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1940

 IDSCEN : OBSERVED

 IDCONS : PREC

 IDLOCN : ARGONNE

 STANAM : ARGONNE HOURLY PRECIPITATION 

(HUNDREDTHS)

 STAID : 07

 TSFILL : -9990.0

Attributes of DSN 2100

 DATCRE : 20020507102813

 DATMOD : 20050915133458

 TSTYPE : FLOW

 TGROUP : 6

 COMPFG : 1

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1980

 IDSCEN : OBSERVED

 IDCONS : FLOW

 IDLOCN : D108

 STANAM : DISCHARGE AT WESTERN SPRINGS (CFS)

 STAID : 05531500

 ISTAID : 5531500

 TSFILL : -99.900
18  Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

Attributes of DSN 2107

 DATCRE : 20020507131103

 DATMOD : 20050915133457

 TSTYPE : FLOW

 STAID : 05531500

 STANAM : DISCHARGE AT WESTERN SPRINGS 

(SIMULATED)

 TCODE : 3

 TGROUP : 5

 TSFORM : 3

 VBTIME : 1

 COMPFG : 2

 TSSTEP : 1

 TSBYR : 1989

 TSFILL : -99.900

 IDSCEN : COMPUTED

 IDLOCN : D108

 IDCONS : FLOW

Attributes of DSN 2500

 DATCRE : 20020507102902

 DATMOD : 20050915133459

 TSTYPE : FLOW

 TGROUP : 6

 COMPFG : 1

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : FLOW

 IDLOCN : D57

 STANAM : DISCHARGE AT ELMHURST PRAIRIE 

PATH (CFS)

 STAID : 05531300

 ISTAID : 5531300

 TSFILL : -99.900

Attributes of DSN 2800

 DATCRE : 20020507102957

 DATMOD : 20050915133457

 TSTYPE : FLOW

 STAID : 05531044

 STANAM : DISCHARGE AT ELK GROVE VILLAGE

(CFS)

 TCODE : 3

 TGROUP : 5

 TSFORM : 3

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1983

 IDSCEN : OBSERVED

 IDLOCN : D126

 IDCONS : FLOW

 ISTAID : 5531044

 TSFILL : -99.900

Attributes of DSN 2900

 DATCRE : 20020507103004

 DATMOD : 20050915133459

 TSTYPE : FLOW

 TGROUP : 6

 COMPFG : 1

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : FLOW

 IDLOCN : U141

 STANAM : DISCHARGE AT ROLLING MEADOWS (CFS)

 STAID : 05530990

 ISTAID : 5530990

 TSFILL : -99.900

Attributes of DSN 4100

 DATCRE : 20020507103016

 DATMOD : 20050915133459

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 2

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : D108

 STANAM : WATER-SURFACE ELEV AT WESTERN SPRINGS

 STAID : 05531410

 TSFILL : 0.000

Attributes of DSN 4200

 DATCRE : 20020507103025

 DATMOD : 20050915133500

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 2

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : U84

 STANAM : WATER-SURFACE ELEV AT OAK BROOK

 STAID : 05531410

 TSFILL : 0.000

Attributes of DSN 4201

 DATCRE : 20050114103547

 DATMOD : 20050915133504

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 2

 TSSTEP : 15

 VBTIME : 2

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : U84

 STANAM : OAKBROOK 15 MIN WATER SURFACE ELEV
Appendix 1 19

Attributes of DSN 4500

 DATCRE : 20020507103047

 DATMOD : 20050915133500

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 2

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : D57

 STANAM : WATER SURFACE ELEV AT

ELMHURST 

 STAID : 05531300

 TSFILL : 0.000

Attributes of DSN 4501

 DATCRE : 20050114103721

 DATMOD : 20050915133506

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 1

 TSFORM : 1

 TCODE : 2

 TSSTEP : 15

 VBTIME : 2

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : D57

 STANAM : ELMHURST 15 MIN WATER SURFACE 

ELEV

Attributes of DSN 4600

 DATCRE : 20020507120526

 DATMOD : 20050915133500

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 2

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : U22

 STANAM : WATER-SURF. ELEV AT WOOD DALE 

 STAID : 5531175

 TSFILL : 0.000

Attributes of DSN 4800

 DATCRE : 20020507103121

 DATMOD : 20050915133501

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 2

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : D126

 STANAM : WATER-SURF. ELEV NR ELK GROVE VILLAGE 

 STAID : 05531044

 TSFILL : 0.000

Attributes of DSN 4900

 DATCRE : 20020507103128

 DATMOD : 20050915133501

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 2

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : D141

 STANAM : WATER-SURF. ELEV AT ROLLING MEADOWS

 STAID : 05530990

 TSFILL : 0.000

Attributes of DSN 5300

 DATCRE : 20030409142644

 DATMOD : 20050915133501

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 2

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ADMT

 IDLOCN : D80

 STANAM : WATER-SURF. ELEV AT HARGER ROAD ADMT 

 STAID : HARGER-ADM

 TSFILL : 0.000

Attributes of DSN 5399

 DATCRE : 20030409143350

 DATMOD : 20050915133501

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 2

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 2000

 IDSCEN : OBSERVED

 IDCONS : ULTR

 IDLOCN : D80

 STANAM : WATER SURF. ELEV AT HARGER ROAD ULTR 

 STAID : HARGER-ULT

 TSFILL : 0.000

Attributes of DSN 5400

 DATCRE : 20030409144031

 DATMOD : 20050915133502

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 2

 TSFORM : 3

 TCODE : 3
20 Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ELEV

 IDLOCN : D45

 STANAM : WATER SURFACE ELEV AT QUARRY

 STAID : QUARRY

 TSFILL : 0.000

Attributes of DSN 5600

 DATCRE : 20030409143601

 DATMOD : 20050915133502

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 2

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 1990

 IDSCEN : OBSERVED

 IDCONS : ADMT

 IDLOCN : U22

 STANAM : WATER-SURF. ELEV AT IRVING PK RD 

ADMIT

 STAID : IRVING-ADM

 TSFILL : 0.000

Attributes of DSN 5699

 DATCRE : 20030409143701

 DATMOD : 20050915133502

 TSTYPE : ELEV

 TGROUP : 6

 COMPFG : 2

 TSFORM : 3

 TCODE : 3

 TSSTEP : 1

 VBTIME : 1

 TSBYR : 2000

 IDSCEN : OBSERVED

 IDCONS : ULTR

 IDLOCN : U22

 STANAM : WATER SURF. ELEV AT IRVING PK RD 

ULTR

 STAID : IRVING-ULT

 TSFILL : 0.000

Attributes of DSN 5700

 DATCRE : 20020507103335

 DATMOD : 20020507103335

 TSTYPE : ELEV

 STAID : THORNDALE

 STANAM : WATER-SURF. ELEV AT THORNDALE 

AV

 TCODE : 3

 TGROUP : 5

 TSFORM : 3

 VBTIME : 1

 COMPFG : 2

 TSSTEP : 1

 TSBYR : 1991

 TSFILL : 0.000

 IDSCEN : none

 IDLOCN : none

 IDCONS : none

Attributes of DSN 6207

 DATCRE : 20020507094540

 DATMOD : 20020507094540

 TSTYPE : PERO

 STAID : 05551700

 STANAM : FLAT GRASS RUNOFF (IN/HOUR*SQ MI)

 TCODE : 3

 TGROUP : 6

 TSFORM : 2

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDSCEN : COMPUTED

 IDLOCN : GENERIC

 IDCONS : PERO

 ISTAID : 5551700

 TSFILL : -99.900

Attributes of DSN 6307

 DATCRE : 20020507094540

 DATMOD : 20020507094540

 TSTYPE : PERO

 STAID : 05551700

 STANAM : MODERATE GRASS RUNOFF (IN/HOUR*SQ MI)

 TCODE : 3

 TGROUP : 6

 TSFORM : 2

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDSCEN : COMPUTED

 IDLOCN : GENERIC

 IDCONS : PERO

 ISTAID : 5551700

 TSFILL : -99.900

Attributes of DSN 6407

 DATCRE : 20020507094540

 DATMOD : 20020507094540

 TSTYPE : PERO

 STAID : 05551700

 STANAM : STEEP GRASS RUNOFF (IN/HOUR*SQ MI)

 TCODE : 3

 TGROUP : 6

 TSFORM : 2

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDSCEN : COMPUTED

 IDLOCN : GENERIC

 IDCONS : PERO

 TSFILL : -99.900

Attributes of DSN 6507

 DATCRE : 20020507094540

 DATMOD : 20020507094540

 TSTYPE : PERO

 STAID : 05551700

 STANAM : FOREST RUNOFF (IN/HOUR*SQ MI)

 TCODE : 3

 TGROUP : 6

 TSFORM : 2

 VBTIME : 1
Appendix 1  21

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDSCEN : COMPUTED

 IDLOCN : GENERIC

 IDCONS : PERO

 TSFILL : -99.900

Attributes of DSN 6607

 DATCRE : 20020507094751

 DATMOD : 20020507094751

 TSTYPE : PERO

 STAID : 05551700

 STANAM : AGRICULTURE RUNOFF (IN/HOUR*SQ

MI)

 TCODE : 3

 TGROUP : 6

 TSFORM : 2

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDSCEN : COMPUTED

 IDLOCN : GENERIC

 IDCONS : PERO

 TSFILL : -99.900

Attributes of DSN 7012

 DATCRE : 20020501154409

 DATMOD : 20020501154409

 TSTYPE : SURO

 STAID : 05551700

 STANAM : SURFACE OUTFLOW (IN/HR*SQ MI)

 TCODE : 3

 TGROUP : 6

 TSFORM : 2

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDLOCN : GENERIC

 IDSCEN : COMPUTED

 IDCONS : SURO

 TSFILL : -99.900

Attributes of DSN 7013

 DATCRE : 20020501154427

 DATMOD : 20020501154427

 TSTYPE : IFWO

 STAID : 05551700

 STANAM : INTERFLOW OUTFLOW (IN/HR *SQ MI)

 TCODE : 3

 TGROUP : 6

 TSFORM : 2

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDLOCN : GENERIC

 IDSCEN : COMPUTED

 IDCONS : IFWO

 TSFILL : -99.900

Attributes of DSN 7014

 DATCRE : 20020501154504

 DATMOD : 20020501154504

 TSTYPE : PET

 STAID : 05551700

 STANAM : PET (IN/DAY*SQ MI)

 TCODE : 4

 TGROUP : 6

 TSFORM : 2

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDLOCN : GENERIC

 IDSCEN : COMPUTED

 IDCONS : PET

 TSFILL : -99.900

Attributes of DSN 7015

 DATCRE : 20020501154514

 DATMOD : 20020501154514

 TSTYPE : TAET

 STAID : 05551700

 STANAM : SIMULATED ET (IN/DAY*SQ MI)

 TCODE : 4

 TGROUP : 6

 TSFORM : 2

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDLOCN : GENERIC

 IDSCEN : COMPUTED

 IDCONS : TAET

TSFILL : -99.900

Attributes of DSN 7016

 DATCRE : 20020501154523

 DATMOD : 20020501154523

 TSTYPE : UZS

 STAID : 05551700

 STANAM : UPPER ZONE STORAGE (IN*SQ MI)

 TCODE : 4

 TGROUP : 6

 TSFORM : 1

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDLOCN : GENERIC

 IDSCEN : COMPUTED

 IDCONS : UZS

 TSFILL : -99.900

Attributes of DSN 7017

 DATCRE : 20020501154531

 DATMOD : 20020501154531

 TSTYPE : LZS

 STAID : 05551700

 STANAM : LOWER ZONE STORAGE (IN*SQ MI)

 TCODE : 4

 TGROUP : 6

 TSFORM : 1

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDLOCN : GENERIC

 IDSCEN : COMPUTED

 IDCONS : LZS

 TSFILL : -99.900
22  Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

Attributes of DSN 7018

 DATCRE : 20020501154541

 DATMOD : 20020501154541

 TSTYPE : AGWS

 STAID : 05551700

 STANAM : GW STORAGE AT START (IN)

 TCODE : 3

 TGROUP : 6

 TSFORM : 2

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDLOCN : GENERIC

 IDSCEN : COMPUTED

 IDCONS : AGWS

 TSFILL : -99.900

Attributes of DSN 7019

 DATCRE : 20020501154650

 DATMOD : 20020501154650

 TSTYPE : Snow

 STAID : 05551700

 STANAM : SIMULATED Snow DEPTH (IN)

 TCODE : 3

 TGROUP : 6

 TSFORM : 1

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDLOCN : GENERIC

 IDSCEN : COMPUTED

 IDCONS : Snow

 TSFILL : -99.900

Attributes of DSN 6107

 DATCRE : 20020430172517

 DATMOD : 20020430172517

 TSTYPE : ISUR

 STAID : 05551700

 STANAM : IMPERVIOUS RUNOFF

 TCODE : 3

 TGROUP : 6

 TSFORM : 2

 VBTIME : 1

 COMPFG : 1

 TSSTEP : 1

 TSBYR : 1940

 IDSCEN : COMPUTED

 IDLOCN : GENERIC

 IDCONS : ISUR

 ISTAID : 5551700

 TSFILL : 
Appendix 2. Descriptions of estimated data periods in the SEP04.WDM 

Watershed Data Management database

Appendix 2  23

Table 2–1. Estimated data periods for real-time network of rain gages in and near 

DuPage County, Ill., water years 1997–2004 in the SEP04.WDM Watershed Data 

Management database for DuPage County data.

[WDM, watershed data management; WWTF, wastewater-treatment facility; site numbers correspond to figure 1; Do., ditto]

Station data used to fill missing period (site number)

Missing period 

(month/day/year)

Addison WWTF at Addison (site 28)

Bloomingdale Lift Station at Bloomingdale (site 23) 08/03/97–08/04/97

Salt Creek at Elmhurst (site 87) 08/11/97–08/12/97

Do. 08/15/97–08/16/97

Bloomingdale Lift Station at Bloomingdale (site 23) 08/18/97

Salt Creek at Elmhurst (site 87) 08/23/97

Do. 09/08/97

Bloomingdale Lift Station at Bloomingdale (site 23) 10/09/97

Salt Creek at Elmhurst (site 87) 11/28/97–12/01/97

Do. 02/10/98–02/12/98

Do. 02/16/98–02/17/98

Do. 06/26/98–06/29/98

Do. 08/23/99

Elmhurst Quarry at Elmhurst (site 14) 10/03/00

Wood Dale WWTF at Wood Dale (site 29) 10/04/00

Elmhurst Quarry at Elmhurst (site 14) 10/05/00–10/07/00

Do. 10/23/00

Wood Dale WWTF at Wood Dale 9site 29) 11/02/00–11/06/00

Elmhurst Quarry at Elmhurst (site 14) 08/24/01

Do. 09/09/01

Do. 09/17/01–09/23/01

Do. 10/04/01–10/05/01

Do. 12/05/01

Do. 12/12/01

Wood Dale WWTF at Wood Dale (site 29) 12/13/01

Do. 08/04/02

Elmhurst Quarry at Elmhurst (site 14) 09/02/02

Do. 09/10/02

Do. 09/18/02–09/20/02

Do. 09/22/02

Do. 10/02/02–10/04/02

Do. 01/25/03–06/30/03

Do. 09/12/03–09/15/03

Bloomingdale Lift Station at Bloomingdale (site 23)

Spring Creek Reservoir near Bloomingdale (site 50) 10/01/02–10/05/02
24  Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

Table 2–1. Estimated data periods for real-time network of rain gages in and near 

DuPage County, Ill., water years 1997–2004 in the SEP04.WDM Watershed Data 

Management database for DuPage County data.—Continued

[WDM, watershed data management; WWTF, wastewater-treatment facility; site numbers correspond to figure 1; Do., ditto]

Station data used to fill missing period (site number) Missing period

(month/day/year)

Busse Woods at Elk Grove Village (site 45)

Bloomingdale Lift Station at Bloomingdale (site 23) 08/03/97–08/04/97

Do. 08/11/97–08/12/97

Do. 08/15/97–08/17/97

Do. 08/23/97

Do. 09/08/97

Do. 10/09/97

Do. 11/27/97

Salt Creek at Elmhurst (site 87) 11/28/97–12/01/97

Bloomingdale Lift Station at Bloomingdale (site 23) 02/10/98–02/11/98

Do. 02/16/98–02/17/98

Do. 09/30/98

Do. 10/02/98–10/03/98

Do. 10/05/98–10/06/98

Do. 04/04/99

Wood Dale WWTF at Wood Dale (site 29) 04/05/99

Schaumburg Public Works at Schaumburg (site 70) 10/04/01

Do. 10/22/01–10/24/01

Do. 11/01/01

Do. 11/14/01

Do. 12/16/01–12/17/01

Do. 12/19/01

Do. 12/22/01

Do. 03/29/02

Elmhurst Quarry at Elmhurst (site 14)

Salt Creek at 22nd Street at Oakbrook (site 86) 08/03/97–08/04/97

Salt Creek at Elmhurst (site 87) 08/12/97

Do. 08/15/97–08/17/97

Salt Creek at 22nd Street at Oakbrook (site 86) 08/18/97

Salt Creek at Elmhurst (site 87) 08/23/97

Salt Creek at 22nd Street at Oakbrook (site 86) 10/09/97

Salt Creek at Elmhurst (site 87) 11/28/97–12/01/97

Do. 02/01/98

Do. 02/16/98

Do. 03/30/98–03/31/98

Do. 05/07/98–05/08/98

Do. 05/12/98–05/13/98

Do. 05/24/98

Wheaton 05/25/98
Appendix 2  25

Table 2–1. Estimated data periods for real-time network of rain gages in and near 

DuPage County, Ill., water years 1997–2004 in the SEP04.WDM Watershed Data 

Management database for DuPage County data.—Continued

[WDM, watershed data management; WWTF, wastewater-treatment facility; site numbers correspond to figure 1; Do., ditto]

Station data used to fill missing period (site number)

Missing period

(month/day/year)

Elmhurst Quarry at Elmhurst (site 14)—Continued

Salt Creek at Elmhurst (site 87) 06/26/98–06/29/98

Do. 07/31/98

Oak Brook Well at Oak Brook (site 64) 08/01/00–08/02/00

Do. 08/05/00–08/06/00

Do. 10/04/00

Do. 11/02/00–11/06/00

Addison WWTF at Addison (site 28) 10/22/01–10/24/01

Do. 10/30/01

Do. 11/14/01

Do. 11/25/01–11/26/01

Oak Brook Well at Oak Brook (site 64) 12/13/01–12/22/01

Addison WWTF at Addison (site 28) 03/26/02–03/31/02

Do. 04/01/02–04/02/02

Oak Brook Well at Oak Brook (site 64)

Salt Creek at 22nd Street at Oakbrook (site 86) 11/28/97–11/29/97

Salt Creek at Elmhurst (site 87) 11/30/97–12/01/97

Salt Creek at 22nd Street at Oakbrook (site 86) 02/16/98

Do. 04/07/98

Do. 06/11/99–06/13/99

Salt Creek at Elmhurst (site 87)

Elmhurst Quarry at Elmhurst (site14) 07/18/97

Do. 07/22/97

Do. 07/26/97

Do. 08/03/97–08/04/97

Do. 08/10/97

Do. 10/10/97

Do. 10/13/97

Do. 10/24/97

Do. 09/28/99–09/29/99

Salt Creek at 22nd at Oak Brook (site 86)

Oak Brook Well at Oak Brook (site 64) 08/05/98

Do. 08/07/98–08/08/98

Do. 09/28/99–09/29/99

Do. 05/08/00–05/09/00

Schaumburg Public Works at Schaumburg (site 70)

Bloomingdale Lift Station at Bloomingdale (site 23) 08/03/97–08/04/97

Do. 08/11/97–08/12/97

Do. 08/15/97–08/18/97
26  Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

Table 2–1. Estimated data periods for real-time network of rain gages in and near 

DuPage County, Ill., water years 1997–2004 in the SEP04.WDM Watershed Data 

Management database for DuPage County data.—Continued

[WDM, watershed data management; WWTF, wastewater-treatment facility; site numbers correspond to figure 1; Do., ditto]

Station data used to fill missing period (site number)

Missing period

(month/day/year)

Schaumburg Public Works at Schaumburg (site 70)—Continued

Bloomingdale Lift Station at Bloomingdale (site 23) 08/23/97

Do. 09/08/97

Do. 10/09/97

Wood Dale WWTF at Wood Dale (site 29) 11/27/97

Salt Creek at Elmhurst (site 87) 11/28/97–12/01/97

Bloomingdale Lift Station at Bloomingdale (site 23) 02/10/98–02/11/98

Do. 02/16/98–02/17/98

Do. 06/26/98–06/29/98

Do. 09/12/99

Do. 09/27/99–09/29/99

Busse Woods at Elk Grove Village (site 45) 03/24/2003–04/10/2003

Spring Creek Reservoir near Bloomingdale (site 50)

Bloomingdale Lift Station at Bloomingdale (site 23) 08/03/97–08/04/97

Do. 08/11/97–08/12/97

Do. 08/15/97–08/18/97

Do. 08/23/97

Do. 09/08/97

Do. 10/09/97

Salt Creek at Elmhurst (site 87) 11/27/97–12/01/97

Bloomingdale Lift Station at Bloomingdale (site 23) 02/10/98–02/11/98

Do. 02/16/98–02/17/98

Do. 06/26/98–06/29/98

Do. 07/03/98–07/04/98

Do. 07/19/98

Do. 08/04/98–08/07/98

Do. 08/22/98

Do. 08/24/98

Do. 09/06/98–09/07/98

Salt Creek at Elmhurst (site 87) 09/14/98

Bloomingdale Lift Station at Bloomingdale (site 23) 09/15/98

Do. 09/20/98

Do. 09/29/98–09/30/98

Do. 10/02/98–10/03/98

Do. 10/05/98–10/06/98

Do. 10/08/98

Do. 10/15/98–10/19/98

Do. 11/10/98

Do. 01/16/99–01/17/99
Appendix 2  27

Table 2–1. Estimated data periods for real-time network of rain gages in and near 

DuPage County, Ill., water years 1997–2004 in the SEP04.WDM Watershed Data 

Management database for DuPage County data.—Continued

[WDM, watershed data management; WWTF, wastewater-treatment facility; site numbers correspond to figure 1; Do., ditto]

Station data used to fill missing period (site number)

Missing period

(month/day/year)

Spring Creek Reservoir near Bloomingdale (site 50)—Continued

Bloomingdale Lift Station at Bloomingdale (site 23) 01/21/99

Do. 01/23/99–01/24/99

Do. 06/10/99–06/13/99

Do. 06/22/99–06/23/99

Do. 06/27/99–06/28/99

Do. 07/01/99

Do. 07/03/99

Do. 07/09/99

Salt Creek at Elmhurst (site 87) 07/17/99

Do. 07/19/99–07/21/99

Bloomingdale Lift Station at Bloomingdale (site 23) 07/22/99

Salt Creek at Elmhurst (site 87) 07/23/99

Do. 07/26/99

Bloomingdale Lift Station at Bloomingdale (site 23) 08/07/99

Do. 08/09/99

Do. 08/12/99–08/13/99

Do. 08/18/99–08/19/99

Do. 11/19/99

Do. 11/22/99–11/24/99

Do. 11/26/99

Schaumburg Public Works at Schaumburg (site 70) 07/10/00

Bloomingdale Lift Station at Bloomingdale (site 23) 10/04/00

Do. 12/01/00–02/24/01

Do. 05/06/01–06/11/01

Do. 06/14/01–06/21/01

Do. 09/18/01–09/23/01

Do. 10/04/01–10/05/01

Do. 10/22/01–10/24/01

Do. 11/01/01

Do. 11/14/01

Do. 11/25/01

Do. 12/16/01–12/22/01

Do. 03/29/02

Do. 04/01/02

Do. 04/28/02

Do. 05/23/02–05/25/02

Do. 08/04/02

Do. 10/17/02–06/09/03
28  Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

Table 2–1. Estimated data periods for real-time network of rain gages in and near 

DuPage County, Ill., water years 1997–2004 in the SEP04.WDM Watershed Data 

Management database for DuPage County data.—Continued

[WDM, watershed data management; WWTF, wastewater-treatment facility; site numbers correspond to figure 1; Do., ditto]

Station data used to fill missing period (site number)

Missing period

(month/day/year)

Spring Creek Reservoir near Bloomingdale (site 50)—Continued

Bloomingdale Lift Station at Bloomingdale (site 23) 08/08/03–09/30/03

Do. 10/03/03

Do. 10/11/03

Do. 10/13/03–10/14/03

Do. 10/24/03–10/25/03

Do. 10/28/03–10/29/03

Do. 11/01/03–11/04/03

Do. 11/15/03–11/18/03

Do. 11/23/03

Do. 12/04/03–12/05/03

Do. 12/09/03–12/10/03

Do. 12/14/03

Do. 12/28/03

Do. 01/04/04–01/05/04

Do. 01/11/04

Do. 01/17/04

Do. 02/02/04–02/03/04

Do. 02/20/04

Do. 02/22/04

Do. 03/01/04

Do. 03/03/04–03/05/04

Do. 03/07/04

Do. 03/25/04–03/26/04

Do. 03/28/04

Do. 04/17/04

Do. 05/10/04–05/14/04

Do. 05/17/04–05/18/04

Do. 05/20/04–05/23/04

Do. 05/25/04

Do. 05/30/04

Do. 06/24/04

Do. 06/28/04

Do. 07/03/04–07/04/04

Do. 07/06/04–07/07/04

Do. 07/09/04

Do. 07/11/04

Do. 07/21/04–07/22/04

Do. 07/26/04
Appendix 2  29

Table 2–1. Estimated data periods for real-time network of rain gages in and near 

DuPage County, Ill., water years 1997–2004 in the SEP04.WDM Watershed Data 

Management database for DuPage County data.—Continued

[WDM, watershed data management; WWTF, wastewater-treatment facility; site numbers correspond to figure 1; Do., ditto]

Station data used to fill missing period (site number)

Missing period

(month/day/year)

Spring Creek Reservoir near Bloomingdale (site 50)—Continued

Bloomingdale Lift Station at Bloomingdale (site 23) 08/25/04–08/28/04

Do. 09/06/04

Westmont Water Department at Westmont (site 85)

Oak Brook Well at Oak Brook (site 64) 11/18/03

Do. 11/23/03

Wood Dale WWTF at Wood Dale (site 29)

Bloomingdale Lift Station at Bloomingdale (site 23) 08/03/97–08/04/97

Do. 08/11/97–08/12/97

Do. 08/15/97–08/18/97

Do. 08/23/97

Do. 09/08/97

Do. 10/09/97

Do. 11/27/97

Salt Creek at Elmhurst (site 87) 11/28/97–12/01/97

Bloomingdale Lift Station at Bloomingdale (site 23) 02/10/98–02/11/98

Do. 02/16/98–02/17/98

Do. 06/26/98–06/27/98

Do. 06/29/98

Do. 07/03/98

Salt Creek at Elmhurst, Ill (site 87) 07/19/99–07/21/99

Do. 07/23/99

Do. 07/26/99

Bloomingdale Lift Station at Bloomingdale (site 23) 08/07/99

Do. 08/09/99

Do. 08/12/99–08/13/99
30 Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

Date (month/

day/year) Gage used to determine snowfall

Type 

precipitation

11/07/97 OAK; filled with Argonne S

11/08/97 OAK; filled with Argonne S

11/09/97 OAK S

11/10/97 OAK S

11/11/97 OAK S

11/12/97 OAK; filled with Argonne S

11/13/97 OAK S

11/14/97 OAK S

11/15/97 OAK S

11/16/97 OAK S

11/17/97 OAK; filled with Argonne S

11/18/97 OAK; filled with Argonne S

12/04/97 OAK S

12/05/97 OAK S

12/06/97 OAK S

12/07/97 OAK S

12/08/97 OAK S

12/09/97 OAK S

12/10/97 OAK S

12/23/97 OAK; filled with Argonne S

12/24/97 OAK S

12/25/97 OAK S

12/26/97 OAK S

01/08/98 WHT S

01/09/98 WHT S

01/13/98 WHT S

01/15/98 WHT S

01/22/98 WHT S

01/23/98 WHT S

11/04/98 ORD T

11/07/98 ORD T

11/08/98 ORD S

11/11/98 ORD T

12/20/98 ORD T

12/21/98 ORD S

12/29/98 ORD S

12/30/98 ORD S

12/31/98 ORD T

Date (month/

day/year) Gage used to determine snowfall

Type 

precipitation

01/01/99 ORD S

01/02/99 ORD S

01/03/99 ORD S

01/05/99 ORD S

01/06/99 ORD S

01/08/99 ORD S

01/09/99 ORD T

01/10/99 ORD T

01/11/99 ORD S

01/12/99 ORD S

01/13/99 ORD S

01/14/99 ORD T

01/15/99 ORD T

01/18/99 ORD S

01/20/99 ORD S

01/23/99 ORD S

01/24/99 ORD T

02/05/99 ORD T

02/12/99 ORD S

02/16/99 ORD T

02/17/99 ORD T

02/19/99 ORD T

02/20/99 ORD S

02/21/99 ORD T

02/24/99 ORD S

02/28/99 ORD T

03/03/99 ORD T

03/05/99 ORD S

03/06/99 ORD S

03/07/99 ORD S

03/08/99 ORD S

03/09/99 ORD S

03/10/99 ORD S

03/25/99 ORD T

12/05/99 ORD S

12/16/99 ORD S

12/17/99 ORD S

12/20/99 ORD T

Table 2–2. Rain gages used to determine and fill snow periods at real-time network of rain gages in and near DuPage County, Ill., for 

calendar years 1997–2000 in the SEP04.WDM Watershed Data Management database.

[Records from the NOAA monthly Climatological Data Publication for Illinois for the period July 1, 1997, through December 31, 2000. The O’Hare precipitation data were used to fill the datasets on snowfall-affected days except as noted. OAK, Oakbrook; WHT, Wheaton; ORD, O’Hare; S, snowfall; T, trace 

snowfall] 
Appendix 2  31

Date (month/

day/year) Gage used to determine snowfall

Type 

precipitation

12/22/99 ORD S

12/23/99 ORD S

12/24/99 ORD T

12/27/99 ORD S

12/28/99 ORD T

01/03/00 ORD S

01/04/00 ORD T

01/05/00 ORD T

01/11/00 ORD T

01/13/00 ORD S

01/14/00 ORD T

01/15/00 ORD T

01/16/00 ORD T

01/17/00 ORD S

01/19/00 ORD S

01/20/00 ORD T

01/22/00 ORD S

01/25/00 ORD S

01/26/00 ORD T

01/27/00 ORD S

01/29/00 ORD S

01/30/00 ORD S

01/31/00 ORD T

02/02/00 ORD T

02/03/00 ORD T

02/04/00 ORD S

02/06/00 ORD T

02/13/00 ORD S

02/14/00 ORD T

02/18/00 ORD S

02/19/00 ORD T

03/09/00 ORD T

03/10/00 ORD T

03/15/00 ORD T

03/16/00 ORD T

03/17/00 ORD T

03/18/00 ORD T

03/19/00 ORD T

Date (month/

day/year) Gage used to determine snowfall

Type 

precipitation

03/28/00 ORD T

04/04/00 ORD T

04/07/00 ORD S

04/08/00 ORD T

04/10/00 ORD T

10/07/00 ORD T

11/13/00 ORD T

11/14/00 ORD T

11/16/00 ORD S

11/17/00 ORD T

11/18/00 ORD T

11/19/00 ORD T

11/20/00 ORD T

11/29/00 ORD T

11/30/00 ORD T

12/01/00 ORD S

12/05/00 ORD T

12/06/00 ORD T

12/07/00 ORD S

12/08/00 ORD T

12/09/00 ORD T

12/10/00 ORD S

12/11/00 ORD S

12/13/00 ORD S

12/14/00 ORD T

12/15/00 ORD T

12/17/00 ORD T

12/18/00 ORD S

12/19/00 ORD T

12/20/00 ORD S

12/21/00 ORD S

12/22/00 ORD T

12/23/00 ORD T

12/26/00 ORD S

12/27/00 ORD S

12/28/00 ORD S

12/29/00 ORD S

12/30/00 ORD S

Table 2–2. Rain gages used to determine and fill snow periods at real-time network of rain gages in and near DuPage County, Ill., for 

calendar years 1997–2000 in the SEP04.WDM Watershed Data Management database.—Continued

[Records from the NOAA monthly Climatological Data Publication for Illinois for the period July 1, 1997, through December 31, 2000. The O’Hare precipitation data were used to fill the datasets on snowfall-affected days except as noted. OAK, Oakbrook; WHT, Wheaton; ORD, O’Hare; S, snowfall; T, trace 

snowfall]
32  Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

Table 2–3. Snowfall-affected periods for water years 2001–04 for the realtime network of rain gages in and near DuPage County, Ill., in the SEP04.WDM 

Watershed Data Management database.

[WWTF, wastewater-treatment facility; site numbers correspond to figure 1]

Snowfall-affected period 

(month/day/year)

Snowfall-affected period 

(month/day/year)

Addison WWTF at Addison (site 28)

12/11/00 12/23/01

01/05/01–01/07/01 12/04/02–12/05/02

02/04/01 12/26/02–01/30/03

02/06/01–02/07/01 03/06/03–03/07/03

02/12/01 01/17/04

02/15/01 02/08/04

02/23/01 02/17/04–02/18/04

Bloomingdale Lift Station at Bloomingdale (site 23)

12/07/00 02/07/01

12/11/00 12/03/02–12/04/02

12/13/00–12/15/00 01/04/03–01/29/03

12/18/00 01/05/04

12/20/00–12/21/00 01/17/04

12/29/00–12/30/00 01/23/04

01/26/01 02/02/04–02/03/04

01/28/01 02/06/04–02/07/04

02/04/01

Busse Woods at Elk Grove Village (site 45)

11/21/00 01/17/02

12/14/00 02/27/02–02/28/02

12/25/00–12/26/00 12/03/02–12/07/02

01/01/01 12/21/02–01/29/03

01/05/01–01/07/01 02/24/03–02/27/03

01/10/01 12/22/03

01/26/01–01/27/01 01/17/04

02/07/01 01/24/04

02/10/01 01/31/04

02/12/01 02/01/04–02/02/04

02/15/01 02/11/04

02/22/01 02/13/04

Elmhurst Quarry at Elmhurst (site 14)

01/05/01 12/14/03

02/04/01 01/11/04

02/06/01–02/07/01 01/17/04

02/12/01 01/23/04–01/24/04

01/19/02 01/26/04

12/27/02–01/04/03 02/02/04–02/03/04

03/06/03–03/07/03 02/05/04–02/07/04
Appendix 2  33

Table 2–3. Snowfall-affected periods for water years 2001–04 for the realtime network of rain gages in and near DuPage County, Ill., in the SEP04.WDM 

Watershed Data Management database.— Continued

[WWTF, wastewater-treatment facility; site numbers correspond to figure 1]

Snowfall-affected period 

(month/day/year)

Snowfall-affected period 

(month/day/year)

Oak Brook Well at Oak Brook (site 64)

01/05/01–01/06/01 01/22/03–01/25/03

01/11/01–01/12/01 02/23/03–02/24/03

01/27/01 03/06/03–03/07/03

02/01/2001 01/11/04

02/04/01 01/17/04

02/06/01–02/07/01 01/23/04

02/12/01 02/02/04–02/04/04

12/03/02–12/04/02 02/09/04

12/28/02–01/06/03 02/11/04

Schaumburg Public Works at Schaumburg (site 70)

11/17/00 01/16/02

12/22/00 03/03/02

12/25/00 12/02/02–12/03/02

01/05/01–01/06/01 01/04/03–01/29/03

01/11/01–01/12/01 01/17/04

01/27/01 01/23/04

02/04/01–02/05/01 01/25/04

02/07/01 02/02/04–02/03/04

02/12/01 02/06/04

02/26/01

Spring Creek Reservoir near Bloomingdale (site 50)

12/03/02–12/04/02 03/05/03–03/07/03

01/05/03–01/29/03

Westmont Water Department at Westmont (site 85)

12/14/00 03/06/03–03/07/03

12/25/00 03/13/03–03/14/03

02/04/01 01/17/04

02/06/01 02/01/04

02/12/01 02/04/04

12/03/02–12/04/02 02/06/04–02/07/04

01/05/03–01/31/03 02/11/04

Wood Dale WWTF at Wood Dale (site 29)

12/14/00 03/05/03–03/07/03

01/05/01–01/07/01 03/13/03–03/14/03

01/27/01 12/14/03–12/15/03

02/03/01–02/04/01 01/11/04

02/06/01–02/07/01 01/17/04

02/15/01 02/02/04

12/26/02–12/27/02 02/11/04

01/03/03–01/31/03 02/18/04
34  Watershed Data Management (WDM) Database for Salt Creek Streamflow Simulation, DuPage County, Illinois

For more information concerning the research described in this report, 

contact:

U.S. Geological Survey

1201 West University Avenue, Suite 100

Urbana, IL 61801–2347

(217) 344–0037

http://il.water.usgs.gov

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