Figure 2.3-1 Plant Location and Clinton Lake Impoundment

Environmental Report for the EGC Early Site Permit
Figure 2.3-1
Plant Location
and Clinton Lake Impoundment
Legend
CPS Facility
Proposed Areas for EGC ESP Facility Structures
Site Boundary: Fenceline
Fork
Sa l
t
C
r e ek
Water: Lakes and Rivers
rt h
Ultimate
Heat Sink
No
5
22
Plant
Sites
Discharge
Flume
Service
Spillway
Data Sources:
U.S. Census Bureau, 2000
USGS, 1984 and 1989
0
22
k
Dam
S
alt
Cr
ee
Lake
Normal Pool
EL 690.0'
Boone
Jo DaviessStephenson
McHenryLake
Winnebago
Carroll Ogle
DeKalbKane
DuPageCook
Whiteside Lee
Rock Island
Henry
Auxiliary
Spillway
Kendall
Bureau
La Salle
Will
Grundy
Putnam
Kankakee
Stark
Marshall
Knox
Livingston
HendersonWarren
PeoriaWoodford
Iroquois
McDonough
Ford
Tazewell
McLean
Fulton
Hancock
Mercer
Mason
Schuyler
Logan DeWittChampaignVermilion
Adams Brown Cass Menard
Piatt
Macon
Douglas
MorganSangamon
Pike
Edgar
Scott
Christian MoultrieColes
Greene
Shelby
Clark
Calhoun Macoupin
EffinghamCumberland
Jersey Montgomery
Fayette
JasperCrawford
Bond
Madison
ClayRichlandLawrence
Clinton Marion
St. Clair
Wayne Wabash
Monroe WashingtonJefferson
Edwards
Hamilton
Perry
Randolph
White
Franklin
Jackson
SalineGallatin
Williamson
Johnson Hardin
Union
Pope
AlexanderPulaskiMassac
0
0.5
Miles
1
2
Environmental Report for the EGC Early Site Permit
Figure 2.3-2
Hydrologic Network
Sangamon River Basin
Legend
Recording Station
Discontinued Station
Cities
Deer
Creek
Lake
Fork
Data Source:
CPS, 1982
N
Not to Scale
Environmental Report for the
EGC Early Site Permit
Figure 2.3-3
Post-dam Peak Flood
Magnitudes and Frequencies for
Salt Creek at Rowell Gauge Station
100,000
10,000
Post-dam Peak Floods
NOTE:
Based on daily mean discharge values.
1,000
Data Source:
USGS, 2004
100
1
10
100
Recurrence Interval (yrs)
Not to Scale
Environmental Report for the EGC Early Site Permit
Figure 2.3-4
Postdam 1-Day Duration,
Low-Flow Magnitudes and
Frequencies for Salt Creek at
Rowell Gauge Station
100.0
Discharge (cfs)
10.0
Postdam Low Flow
1.0
Data Source:
USGS, 2002
0.1
1
10
100
Recurrence Interval (yrs)
Not to Scale
Environmental Report for the EGC Early Site Permit
Figure 2.3-5
Lake ElevationArea Capacity Curves
Legend
Effective Surface Area
Total Surface Area
Total Volume
Data Source:
CPS, 1982
Not to Scale
Environmental Report for the EGC Early Site Permit
Figure 2.3-6
Plan of Main Dam, Spillways,
and Outlet Works
OGEE SPILLWAY
CONCRETE
CHUTE
CREEK BED ELEVATION 648.0
6
Data Source:
CPS, 1982
2.3.7
2.3.7
N
Not to Scale
Environmental Report for the EGC Early Site Permit
Figure 2.3-7
Water Surface Profiles
Salt Creek
Data Source:
CPS, 1982
Not to Scale
Environmental Report for the EGC Early Site Permit
Figure 2.3-8
Water Surface Profiles
of North Fork Salt Creek
Data Source:
CPS, 1982
Not to Scale
Environmental Report for the EGC Early Site Permit
Figure 2.3-9
Flood Prone Area
Legend
CPS Facility
Proposed Areas for EGC ESP Facility Structures
Site Boundary: Fenceline
100-year Flood Zone Boundary
Probable Maximum Flood Zone Boundary (709.8 ft)
Clinton Lake
Note: The Probable Maximum Flood Zone Boundary and the 100-year Flood Zone Boundary
were derived form USGS National Digital Elevation Model Data. The Probable Maximum
Flood Elevation is 709.8 ft (216 m). The 100-year flood is 697 ft (212 m). Variations in
mapping accuracy between the map base and the flood boundaries derived from the
USGS Digital Elevation Model are apparent in locations on the map.
Data Sources:
USGS, 1984 and 1989
USGS, 1999
ISWS, 1996
CPS, 2002
Boone
Jo DaviessStephenson
McHenryLake
Winnebago
Carroll
Ogle
DeKalbKane
DuPageCook
Kendall
Rock Island
Will
Bureau
Henry
La SalleGrundy
Mercer
Putnam
Kankakee
Stark
Marshall
Knox
Livingston
HendersonWarren
PeoriaWoodford
Iroquois
McDonough
Ford
Tazewell
McLean
Fulton
Hancock
DeWitt
Mason
Schuyler
ChampaignVermilion
Logan
AdamsBrown Cass Menard
Piatt
Macon
Douglas
MorganSangamon
Pike
Edgar
Scott
Christian MoultrieColes
Greene
Shelby
Clark
Macoupin
Calhoun
Cumberland
Effingham
Jersey Montgomery
Fayette
JasperCrawford
MadisonBond
ClayRichlandLawrence
Clinton Marion
St. Clair
Wayne Wabash
MonroeWashingtonJefferson
Edwards
Hamilton
RandolphPerry
White
Franklin
Whiteside Lee
Clinton Lake
Jackson
SalineGallatin
Williamson
Johnson Hardin
Union
Pope
AlexanderPulaskiMassac
0
1,000
Feet
2,000
4,000
Environmental Report for the EGC Early Site Permit
Figure 2.3-10
Lake Area Capacity Curves
Before and After 50 Years
of Sedimentation
Data Source:
CPS, 1982
Not to Scale
10/12/64
6/21/65
2/28/66
11/7/66
7/17/67
3/26/68
12/3/68
8/12/69
4/21/70
12/29/70
9/8/71
5/17/72
1/24/73
10/3/73
6/12/74
2/20/75
10/30/75
7/8/76
3/17/77
11/24/77
8/4/78
4/13/79
12/21/79
8/29/80
5/8/81
1/16/82
9/25/82
6/4/83
2/11/84
10/20/84
6/30/85
3/9/86
11/16/86
7/26/87
4/3/88
12/12/88
8/21/89
4/30/90
1/7/91
9/16/91
5/26/92
2/2/93
10/12/93
6/21/94
2/28/95
11/8/95
7/17/96
3/26/97
Temperature ( F)
Environmental Report for the EGC Early Site Permit
Figure 2.3-11
Salt Creek Temperature at
Rowell Gauge Station
(October 12, 1964 - April 1, 1997)
90
80
70
60
50
40
30
10
Pre CPS
Predam
Post CPS
20
Postdam
0
Data Source:
USGS, 2002
Date
Not to Scale
Environmental Report for the EGC Early Site Permit
Figure 2.3-12
Area-Capacity of
Submerged Ultimate Heat Sink
Data Source:
CPS, 1982
Not to Scale