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FAIRMONT CITY, NEW RIVER CROSSING ISGS #53POTENTIAL WETLAND COMPENSATION SITEFAP 999Saint Clair County, near Fairmont City, IllinoisPrimary Project Manager: Steven E. BentonSecondary Project Manager: not assigned

SITE HISTORY

C August 1999: The ISGS conducted an initial site evaluation. The results were reported toIDOT by letter in November.

C June 2000: IDOT requested that the ISGS perform a Level II investigation.

C September 2000: ISGS began monitoring ground- and surface-water levels.

C March 2003: A Level II report was submitted to IDOT (ISGS Open-File Series 2003–04).

WETLAND HYDROLOGY CALCULATION FOR 2007

The area of the site that satisfied wetland hydrology criteria (Environmental Laboratory 1987) formore than 5% of the 2007 growing season was estimated to be 10.9 ha (27.0 ac) out of a totalarea of 32.4 ha (80.0 ac). The area that satisfied wetland hydrology criteria for more than 12.5%of the 2007 growing season was estimated to be 10.6 ha (26.2 ac). These estimates are basedon the following factors:

C According to the MRCC, the median date that the growing season begins in nearbyBelleville, Illinois, is April 6 and the season lasts 199 days; 5% of the growing season is10 days and 12.5% of the growing season is 25 days.

C Total precipitation recorded at the Belleville, Illinois weather station during the monitoring

period was 91% of normal. Precipitation was at or above normal in October andDecember 2006, and in January, February, and May 2007. Total precipitation in the springwas 99% of normal.

C In 2007, wetland hydrology occurred for more than 5% of the growing season at wells 3S,4S, 5S, 9S, 13S, 15S, 17SR, 25S, and 26S. Wetland hydrology occurred for more than12.5% of the growing season at wells 3S, 4S, 5S, 9S, 13S, 15S, 17SR, and 26S.

C Inundation occurred in two areas of the site. In the southwest pond (Global) and thedrainage ditch along the base of the terrace (gauges AR, B, and BR) surface-waterelevation was at or above 121.90 m for both 5% and 12.5% of the growing season. Atgauges D and F, on the east side of the site, surface-water elevation was at or above122.35 m (401.43 ft) for both 5% and 12.5% of the growing season.

PLANNED FUTURE ACTIVITIES

C Monitoring will continue at this site until notified otherwise by IDOT.

Colli

nsville

Rd.

Inte

rsta

te55/7

0

IL-1

11

Cahokia Canal

studyarea

Fairmont City, New River Crossing Potential Wetland Compensation Site(FAP 999)

General Study Area and Vicinityfrom the USGS Topographic Series, Monks Mound, IL 7.5-minute Quadrangle (USGS 1993)

0

0

2000 ft

500m

11S10S

E

18S,U19S,U

6S,U,M,L

7S,M,L

14L

16M,L

15M,L

13L

9S

monitoring well

staff gauge

surface-water logger

rain gauge

Fairmont City Potential Wetland Compensation Site

(FAP 999)

Estimated Areal Extent of 2007 Wetland Hydrology

based on data collected between September 1, 2006 and September 1, 2007

Map based on USGS digital orthophotograph, Monks Mound SW quarter quadrangle

produced from 04/08/1999 aerial photography (ISGS 2001)

monitoring well, staff gauge and data logger locations from GPS survey

0 500 ft

0 100m

16S

12S

23S

13M24S

14M

D

4S

8S

17S

BR

14S

15SAR

Global

3S

13S

2007 Wetland Hydrology

>5% of growing

season

>12.5% of growing

season

5S,M,L26S25S

F

Fairmont City, New River Crossing Potential Wetland Compensation Site September 1, 2006 to September 1, 2007

Water-Level Elevationsin Soil-Zone and Upper Wells

120.0

120.5

121.0

121.5

122.0

122.5

123.0

Aug

2006

Sep

2006

Oct

200

6

Nov

200

6

Dec

200

6

Jan

2007

Feb

2007

Mar

200

7

Apr 2

007

May

200

7

Jun

2007

Jul 2

007

Aug

2007

Sep

2007

Elev

atio

n (in

m re

fere

nced

to N

AVD

, 198

8)

Well 3SWell 4SWell 5SWell 6SWell 6UWell 7SWell 8SWell 9SWell 10SWell 11SWell 12SWell 13SWell 14SWell 15SWell 16SWell 17SRWell 18SWell 18UWell 19SWell 19UWell 23SWell 24SWell 25SWell 26SWell 4S (Global)Well 6S (Global)Well 25S (Global)

Fairmont City, New River Crossing Potential Wetland Compensation Site September 1, 2006 to September 1, 2007

Depth to Waterin Soil-Zone and Upper Wells

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

Aug

2006

Sep

2006

Oct

200

6

Nov

200

6

Dec

200

6

Jan

2007

Feb

2007

Mar

200

7

Apr 2

007

May

200

7

Jun

2007

Jul 2

007

Aug

2007

Sep

2007

Dep

th (i

n m

refe

renc

ed to

land

sur

face

)

Well 3SWell 4SWell 5SWell 6SWell 6UWell 7SWell 8SWell 9SWell 10SWell 11SWell 12SWell 13SWell 14SWell 15SWell 16SWell 17SRWell 18SWell 18UWell 19SWell 19UWell 23SWell 24SWell 25SWell 26SWell 4S (Global)Well 6S (Global)Well 25S (Global)

Fairmont City, New River Crossing Potential Wetland Compensation Site September 1, 2006 to September 1, 2007

Water-Level Elevationson Stage Gauges and Data Loggers in the Fairmont City 1 Site

121.5

122.0

122.5

Aug

2006

Sep

2006

Oct

200

6

Nov

200

6

Dec

200

6

Jan

2007

Feb

2007

Mar

200

7

Apr 2

007

May

200

7

Jun

2007

Jul 2

007

Aug

2007

Sep

2007

Elev

atio

n (in

m re

fere

nced

to N

AVD

, 198

8)

Gauge AR

Gauge B

Gauge BR

Gauge D

Gauge E

Gauge F

Southwest Pond(Global)

Fairmont City, New River Crossing Potential Wetland Compensation Site September 1, 2006 to September 1, 2007

Water-Level Elevationsin Middle and Lower Wells

120.0

120.5

121.0

121.5

122.0

122.5

Aug

2006

Sep

2006

Oct

200

6

Nov

200

6

Dec

200

6

Jan

2007

Feb

2007

Mar

200

7

Apr 2

007

May

200

7

Jun

2007

Jul 2

007

Aug

2007

Sep

2007

Elev

atio

n (in

m re

fere

nced

to N

AVD

, 198

8)

Well 5MWell 5LWell 6MWell 6LWell 7MWell 7LWell 13MWell 13LWell 14MWell 14LWell 15MWell 15LWell 16MWell 16L

Fairmont City, New River Crossing Potential Wetland Compensation Site September 1, 2006 to September 1, 2007

Depth to Waterin Middle and Lower Wells

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

Aug

2006

Sep

2006

Oct

200

6

Nov

200

6

Dec

200

6

Jan

2007

Feb

2007

Mar

200

7

Apr 2

007

May

200

7

Jun

2007

Jul 2

007

Aug

2007

Sep

2007

Dep

th (i

n m

refe

renc

ed to

land

sur

face

)

Well 5MWell 5LWell 6MWell 6LWell 7MWell 7LWell 13MWell 13LWell 14MWell 14LWell 15MWell 15LWell 16MWell 16L

Fairmont City, New River CrossingPotential Wetland Compensation Site

September 2006 through August 2007

0

1

2

3

4

5

6

7

8

9

10

11

12

Sep

200

6

Oct

200

6

Nov

200

6

Dec

200

6

Jan

2007

Feb

200

7

Mar

200

7

Apr

200

7

May

200

7

Jun

2007

Jul 2

007

Aug

200

7

Pre

cipi

tatio

n (in

ches

)

monthly precipitation recorded at weather station (Midwestern Regional Climate Center)

monthly precipitation recorded on site by ISGS

1971-2000 monthly 30% above average threshold (National Water and Climate Center)

1971-2000 monthly average precipitation (National Water and Climate Center)

1971-2000 monthly 30% below average threshold (National Water and Climate Center)

data incomplete

Total Monthly Precipitation Recorded On Site and at theBelleville, IL SIU Research Center Weather Station

Graph last updated October 10, 2007

on-site rain gaugeremoved 12/28/2006 installed 03/21/2007