Figure 2.3-1

Number of Tornadoesper County

(1916-1969) 54 Year Period

Legend

N

Not to Scale

9 denotes the number of tornadoesreported in Iroquois County duringthe period 1916-1969

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-2Wind Rose, 10-Meter Level,Clinton Power Station Site,

Period of Record: 4/14/72-4/30/77

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-3

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite JanuaryPeriod of Record: 4/14/72-4/30/77

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-4

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite FebruaryPeriod of Record: 4/14/72-4/30/77

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-5

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite MarchPeriod of Record: 4/14/72-4/30/77

Legend

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Not to Scale

Legend

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-6

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite AprilPeriod of Record: 4/14/72-4/30/77

Not to Scale

Figure 2.3-7

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite MayPeriod of Record: 4/14/72-4/30/77

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-8

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite JunePeriod of Record: 4/14/72-4/30/77

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-9

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite JulyPeriod of Record: 4/14/72-4/30/77

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-10

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite AugustPeriod of Record: 4/14/72-4/30/77

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-11

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite SeptemberPeriod of Record: 4/14/72-4/30/77

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-12

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite OctoberPeriod of Record: 4/14/72-4/30/77

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-13

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite NovemberPeriod of Record: 4/14/72-4/30/77

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-14

Wind Rose, 10-Meter Level,Clinton Power Station Site,

Composite DecemberPeriod of Record: 4/14/72-4/30/77

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-15

Wind Rose, 10-Meter Level,

Clinton Power Station Site,Period of Record: 1/1/00-8/31/02

Legend

Not to Scale

NNNE

NE

ENE

E

ESE

SE

SSES

SSW

SW

WSW

W

WNW

NW

NNW

9% 12% 15%6%3%

3.1 - 8.0

> 8.0

1.0 - 3.0

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

220

225

Legend

Proposed Areas for EGC ESP Facility Structures

Vicinity: 5 mi Around Project Area

Data Sources:USGS, 1984 and 1989

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.3-16Topographic Map Within5 mi of the EGC ESP Site

Will

Pike

Lee Cook

Ogle

McLeanFulton

La Salle

Knox

Iroquois

Henry

Adams

Bureau

Shelby

Ford

Clay

Edgar

Livingston

Wayne

Kane

LoganPiatt

Peoria

Fayette

Lake

Vermilion

Clark

Hancock

Macoupin

Coles

White

Madison

Macon

Champaign

DeKalb

St. ClairMarion

Mason

Perry

Mercer

Sangamon

ChristianMorgan

Cass

Tazewell

Warren

Jasper

Jackson

Greene

Bond

Clinton

Union Pope

Whiteside

Carroll

Kankakee

McHenry

Jefferson

Randolph

Saline

DeWitt

Grundy

Jersey Montgomery

Jo Daviess

Woodford

Stark

Franklin

Monroe

Douglas

Schuyler

Scott

Hamilton

Crawford

McDonough

Brown

Washington

Effingham

Stephenson

Marshall

Winnebago

Gallatin

Boone

Moultrie

Kendall

DuPage

Menard

Richland

JohnsonWilliamson

Rock Island

Lawrence

Henderson

Calhoun

Massac

Cumberland

Pulaski

Wabash

Hardin

Edwards

Alexander

Putnam

0 2 41Miles

Figure 2.3-17Topographical Cross Section as aFunction of the Distance From the

EGC ESP Site

Legend

Not to Scale

Data Source:CPS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

MICROWAVETOWER

METEOROLOGICALTOWER

EXISTINGSTRUCTURE

PROPOSEDSITE

Legend

Proposed Areas for EGC ESP Facility Structures

Figure 2.3-18Topographical Map of the Site Area

Meteorological Tower Location

Will

Pike

Lee Cook

Ogle

McLeanFulton

La Salle

Knox

Iroquois

Henry

Adams

Bureau

Shelby

Ford

Clay

Edgar

Livingston

Wayne

Kane

LoganPiatt

Peoria

Fayette

Lake

Vermilion

Clark

Hancock

Macoupin

Coles

White

Madison

Macon

Champaign

DeKalb

St. ClairMarion

Mason

Perry

Mercer

Sangamon

ChristianMorgan

Cass

Tazewell

Warren

Jasper

Jackson

Greene

Bond

Clinton

Union Pope

Whiteside

Carroll

Kankakee

McHenry

Jefferson

Randolph

Saline

DeWitt

Grundy

Jersey Montgomery

Jo Daviess

Woodford

Stark

Franklin

Monroe

Douglas

Schuyler

Scott

Hamilton

Crawford

McDonough

Brown

Washington

Effingham

Stephenson

Marshall

Winnebago

Gallatin

Boone

Moultrie

Kendall

DuPage

Menard

Richland

JohnsonWilliamson

Rock Island

Lawrence

Henderson

Calhoun

Massac

Cumberland

Pulaski

Wabash

Hardin

Edwards

Alexander

Putnam

0 0.25 0.50.125Miles

Data Sources:USGS, 1984 and 1989

Site Safety Analysis Report forthe EGC Early Site Permit

NorthF

ork

Sal

t Cre

ek

Salt Cre

e k

LakeNormal Pool

EL 690.0'

UltimateHeat Sink

DischargeFlume

PlantSites

ServiceSpillway

AuxiliarySpillway

Dam

220

225

Legend

CPS Facility

Proposed Areas for EGC ESP Facility Structures

Water: Lakes and Rivers

Data Sources:U.S. Census Bureau, 2000USGS, 1984 and 1989

Figure 2.4-1Plant Location

and Clinton Lake Impoundment

Will

Pike

Lee Cook

Ogle

McLeanFulton

La Salle

Knox

Iroquois

Henry

Adams

Bureau

Shelby

Ford

Clay

Edgar

Livingston

Wayne

Kane

LoganPiatt

Peoria

Fayette

Lake

Vermilion

Clark

Hancock

Macoupin

Coles

White

Madison

Macon

Champaign

DeKalb

St. ClairMarion

Mason

Perry

Mercer

Sangamon

ChristianMorgan

Cass

Tazewell

Warren

Jasper

Jackson

Greene

Bond

Clinton

Union Pope

Whiteside

Carroll

Kankakee

McHenry

Jefferson

Randolph

Saline

DeWitt

Grundy

Jersey Montgomery

Jo Daviess

Woodford

Stark

Franklin

Monroe

Douglas

Schuyler

Scott

Hamilton

Crawford

McDonough

Brown

Washington

Effingham

Stephenson

Marshall

Winnebago

Gallatin

Boone

Moultrie

Kendall

DuPage

Menard

Richland

JohnsonWilliamson

Rock Island

Lawrence

Henderson

Calhoun

Massac

Cumberland

Pulaski

Wabash

Hardin

Edwards

Alexander

Putnam

0 1 20.5Miles

Site Safety Analysis Report forthe EGC Early Site Permit

CONCRETECHUTE

2.3.7

OGEE SPILLWAY

CREEK BED ELEVATION 648.0

6

2.3.7

Figure 2.4-2Plan of Main Dam, Spillways,

and Outlet WorksLegend

N

Not to Scale

Data Source:CPS, 1982

Site Safety Analysis Report forthe EGC Early Site Permit

Figure 2.4-3

Lake Elevation-Area Capacity Curves

Legend

Not to Scale

Data Source:CPS, 1982

Site Safety Analysis Report forthe EGC Early Site Permit

Effective Surface Area

Total Surface Area

Total Volume

Figure 2.4-4

Hydrologic NetworkSangamon River Basin

Legend

N

Not to Scale

Data Source:CPS, 1982

Recording Station

Discontinued Station

Cities

Site Safety Analysis Report forthe EGC Early Site Permit

DeerCreek

Lake Fork

Figure 2.4-5

Post-dam Peak FloodMagnitudes and Frequencies for

Salt Creek at Rowell Gauge Station

Not to Scale

Data Source:USGS, 2002

Site Safety Analysis Report forthe EGC Early Site Permit

100

100

1000

10000

100000

1 10

Recurrence Interval (yrs)

Dis

ch

arg

e (cfs

)

Post-dam Peak Floods

NOTE:Based on daily m ean d ischarge va lues.

Figure 2.4-6

Summer and Winter PMPIntensity Duration Curves

Legend

Not to Scale

Site Safety Analysis Report forthe EGC Early Site Permit

Data SourceCPS, 2002