1. Supplemental Info NOF and COS.pdf
    2. Response to Information.pdf
      1. PCB 09-38 Ameren's Response to Information Request.pdf
        1. Response to Information.pdf
          1. Response.pdf
        2. Coffeen Signature Page.pdf
          1. Page 1
        3. Supplemental Info Exhibits.pdf
          1. Supplemental Info Exhibits.pdf
        4. Affidavit Shortelle July 2009.pdf

 
BEFORE THE
ILLINOIS POLLUTION CONTROL BOARD
AMEREN ENERGY GENERATING
COMPANY,
Petitioner,
v.
ILLINOIS ENVIRONMENTAL PROTECTION
AGENCY,
Respondent.
)
)
)
)
)
) PCB 09-38
~
(Thermal Demonstration)
)
)
)
NOTICE OF FILING
TO:
John Therriault, Assistant Clerk
Illinois Pollution Control Board
James
R. Thompson Center
Suite 11-500
100 West Randolph
Chicago, Illinois 60601
Joey Logan-Wilkey
Illinois Environmental Protection Agency
Division
of Legal Counsel
1021 North Grand Avenue, East
P .O.Box 19276
Springfield, Illinois 62794-9276
Carol Webb, Hearing Officer
Illinois Pollution Control Board
1021 North Grand Avenue East
P.O.Box 19274
Springfield, Illinois 62794-9274
WebbC@ipcb.state.il.us
PLEASE TAKE
NOTICE that I have electronically filed with the Office
of the Clerk of the
Pollution Control Board,
AMEREN'S RESPONSE TO INFORMATION REQUESTED
DURING PUBLIC HEARING, copies of which are herewith served upon you.
Ameren Energy Generating Company
Electronic Filing - Received, Clerk's Office, July 10, 2009

Dated: July 10, 2009
Amy Antoniolli
SCHIFF HARDIN LLP
233 South Wacker Drive
Suite
6600
Chicago, Illinois 60606
Tel: 312-258-5500
Email: aantoniolli@schitlhardin.com

CERTIFICATE OF SERVICE
I, the undersigned, certify that on this 10
1b
day of July, 2009, I have served electronically
the attached,
AMEREN'S RESPONSE TO INFORMATION REQUESTED DURING
PUBLIC HEARING,
upon the following persons:
John Therriault, Assistant Clerk
Illinois Pollution Control Board
James
R. Thompson Center
Suite 11-500
100 West Randolph
Chicago, Illinois 60601
therriauj@ipcb.state.il.us
Joey Logan-Wilkey
Illinois Environmental Protection Agency
Division
of Legal Counsel
1021 North Grand Avenue, East
P.O.Box 19276
Springfield, Illinois 62794-9276
Joey.logan-wilkey@illinois.gov
July
10, 2009
Amy Antoniolli
SCHIFF HARDIN LLP
233 South Wacker Drive
Suite 6600
Chicago, Illinois 60606
312-258-5500
Carol Webb, Hearing Officer
Illinois Pollution Control Board
1021 North Grand A venue East
P.O.Box 19274
Springfield, Illinois 62794-9274
Webbc@ipcb.state.il.us

 
BEFORE THE
ILLINOIS POLLUTION CONTROL BOARD
AMEREN ENERGY GENERATING
COMPANY,
Petitioner,
v.
ILLINOIS ENVIRONMENTAL PROTECTION
AGENCY,
Respondent.
)
)
)
)
)
)
)
)
)
)
)
PCB 09-38
(Thermal Demonstration)
AMEREN’S RESPONSE TO INFORMATION
REQUESTED DURING PUBLIC HEARING
NOW COMES AMEREN ENERGY GENERATING COMPANY (“Ameren” or “the
Petitioner”), by and through its attorneys, SCHIFF HARDIN, LLP, and submits additional
information. On June 23, 2009, the Illinois Pollution Control Board (“Board”) conducted a
hearing in this matter.
1
During the hearing, additional information was requested by either the
Board or the Illinois Environmental Protection Agency (“Agency”). The Hearing Officer set the
date by which to submit the additional information as July 10, 2009. In response to the
information requests and to complete the record, Ameren submits the following:
A.
Flow Capacity of Ameren’s 48-cell Cooling Tower (Tr. at 69-70):
Ameren
currently utilizes supplemental cooling towers at the Coffeen Power Station with a flow capacity
of 200,000 gallons per minute (gpm). Pet. Exh. 15, pg. 9, Table 3-1. The permit application for
the construction of the cooling towers is attached as Exhibit A.
B.
Economic Analysis of the Proposed 175,000 gpm Cooling Tower (Tr. at 72-
73):
As part of the capital planning and budget process, construction projects are screened and
ranked based upon an internal determination as to whether such projects are economically viable.
1
The transcript of the June 23, 2009 hearing will be cited to as “Tr. at __.”
Electronic Filing - Received, Clerk's Office, July 10, 2009

The company refers to this analysis as an “EVA” which stands for economic viability analysis.
To be viable, a capital project does not necessarily need to generate a “profit.” However, the
project must, at a minimum, be economically neutral over a reasonable cost-recovery period.
Projects necessary to fulfill environmental regulatory requirements such as the $600 million
dollars spent installing scrubbers and SCRs at Coffeen Power Station are exempt from this
requirement due to the mandatory nature of the project.
In the past ten years, Ameren has approved and implemented various capital projects
designed to reduce thermal loading on Coffeen Lake so that Coffeen Power Station could
continue to operate within the constraints of its specific thermal limits without resorting to de-
rates. These capital projects included the development of a 70-acre cooling basin as well as the
construction of a 48-cell cooling tower system. Despite these efforts, de-rates have been
necessary from time to time in the shoulder months of May and October. Ameren retained
Sargent & Lundy to propose and evaluate additional enhancements to the lake’s cooling systems.
Sargent & Lundy evaluated eight alternative capital projects designed to reduce further thermal
loading on the lake. Of these alternatives, the one providing the best economics was identified:
the installation of a 175,000 gpm cooling towers with a capital cost of $18 million dollars.
Ameren analyzed the economic viability of the 175,000 gpm cooling tower in
comparison to the alternative of continuing as-is by using derates to comply with the thermal
limits. That analysis, performed in 2006, estimated that it would take approximately 11.5 years
for the company to recover the costs of its investment in the new cooling tower. Because these
were extraordinary costs with a long payback period, the company concluded that these
investments, added to the initial investments made in the cooling basin and existing cooling
tower, were not justified especially inasmuch as the additional cooling capacity provided by the
175,000 gpm cooling tower would allow Coffeen Station an estimated 185,000 megawatt hours
(MWh) of additional annual generation. Ameren also asked Sargent & Lundy to model the
Electronic Filing - Received, Clerk's Office, July 10, 2009

performance of the existing cooling system under warmer-than-normal summer conditions, but
with the modified thermal limits being requested in this proceeding. Sargent & Lundy concluded
the proposed alternative May and October thermal limits would be able to accommodate the
same rate of generation as any of the other proposed additional cooling system modifications.
Based on these results, the company concluded that the substantial additional investment costs
necessary to meet the existing temperature limits outweighed the marginal benefits to be gained
by having a helper cooling tower at the ready, but that would realistically be deployed an average
of only 31 days per year during time periods when market prices and operating margins are low.
The Company concluded that the proposed project would be uneconomical, particularly when
compared to other capital projects that compete for finite capital dollars and promise greater
benefit per dollar spent.
In preparing for the hearing in this case, and recognizing that the United States is
experiencing economic conditions not seen since the Great Depression, Ameren updated its
analysis. In updating the analysis, two critical assumptions have changed: The future market
prices for power and the likelihood of additional costs in the form of a CO
2
tax or other
compliance cost. When such considerations are taken into account, the costs associated with the
capital investment in the 175,000 gpm cooling towers cannot be recovered before the equipment
itself needs to be replaced. The power generation industry in Illinois now operates in a
deregulated environment and as such capital expenditures are not subject to rate-based regulation
or recovery. Accordingly, capital expenditures must be supported by sales of power and
associated power prices that are the source of cash flow and earnings. Power prices began a
precipitous drop in July 2008 and have continued to be depressed during this prolonged
recession that has resulted in record job losses, bankruptcies and lay offs.
Set forth below is a table depicting futures prices for CinHub Real Time (RT) Around-
The-Clock (ATC) energy, calculated from peak and off-peak settlement prices reported by the

New York Mercantile Exchange (NYMEX), on a per megawatt-hour (MWh) basis. This data
demonstrates the material drop in power prices experienced in the past year, and expected by
market participants over the next few years:
Year
As of June 30,
2008
As of June
30, 2009
Change in
$/MWh
2009
$63.50
$30.83
($32.67)
2010
$58.66
$36.95
($21.71)
2011
$58.69
$41.10
($17.59)
2012
$61.80
$43.86
($17.94)
2013
$62.18
$48.81
($13.37)
In addition, the original analysis of the economic viability of the 175,000 gpm cooling
tower did not consider the cost of compliance with carbon regulation. An energy cost adjustment
for pollution control equipment needed for compliance with carbon regulation beginning in 2014
was factored into the updated economic viability analysis. By changing these two critical
assumptions, the updated analysis demonstrates that despite the increased availability this
alternative would provide, the additional capacity revenues, given the decreasing energy margins
and high costs of compliance with future carbon regulation, Ameren would never recover the
total capital costs required to implement the 175,000 capacity cooling tower. As a result,
Ameren does not consider this technology an economically reasonable alternative.
C.
Phosphorus Loading Calculations (Tr. at 226):
The calculations attached as
Exhibit B are the results Dr. Shortelle relied upon to support her estimate of the amount of
phosphorus that would be fluxed into the hypolimnion of Coffeen Lake during the months of
May and October. Tr. Exh. 3, Attach.2.

D.
2007 Provisional Variance (Tr. at 109):
The Agency requested a signed copy of
the provisional variance granted by the Agency on October 24, 2007 (IEPA-08-14). Hot and
humid weather conditions and lack of precipitation during September and October 2007 led to
Ameren’s request for a provisional variance. By the time the provisional variance was issued,
these weather conditions no longer existed and Ameren did not execute the variance or utilize the
relief granted.
E.
Coffeen Lake Studies (Tr. at 210-216):
Ameren and IDNR have reached an
agreement in principle, a draft memorandum of understanding (“Draft MOU”), to conduct
additional studies of Coffeen Lake and the fishery if the Board grants the requested relief.
See
the Draft MOU, attached as Exhibit C. Ameren believes that the draft MOU is ready for final
execution by IDNR. The Agency has advised Ameren that it has no objections to the agreement.
Assuming relief from the current thermal limits is granted, the MOU provides that
Ameren and IDNR will develop study plans to monitor the status of key fish populations in the
lake and document the long-term effects, if any, of the revised thermal limits for the months of
May and October on these populations. The studies will also investigate the ability of fish to
avoid exposure to stress by seeking preferred temperatures within the Lake’s environment and
will locate available thermal refuges during peak temperatures. The draft MOU sets forth the
conceptual framework for such studies. According to the MOU, the fish population study plan
design will be completed in collaboration with the IDNR and the field work will be done as a
joint effort between IDNR and Ameren field contractors.
The study will include the
representative important species (RIS) identified in this petition as well as new species that might
be introduced. Ameren is not asking that the studies also be made part of the request for relief
before the Board, but Ameren would agree to publish or otherwise make available the results of
the studies.
Electronic Filing - Received, Clerk's Office, July 10, 2009

 
The MOO does not alter IDNR authority or responsibility to investigate and assess fish
kills should they occur.
If investigation shows that a fish kill has resulted from the requested
relief, Ameren agrees to replenish
or replace the impacted resource pursuant to the terms and
conditions
of a Fish Stocking Plan to be developed in consultation with IDNR.
In addition to compliance with the thermal limitations, as well as and restocking and
replenishing fish PQPulations as provi
ded
in the draft MOO, in the event excessive fish mortality
occurs during the summer months, Ameren would also agree
to implement appropriate
mitigation measures. Ameren will set forth proposed mitigation measures in the post-hearing
brief.
Dated: July 10, 2009
Amy Antoniolli
SCHIFF HARDIN LLP
233 South Wacker Drive
Suite 6600
Chicago, Illinois
60606
Tel: 312-258-5500
Email: aantoniolli@schiffuardin.com
Respectfully submitted,
Ameren Energy Generating Company
By:
my Antolllolll
6
Electronic Filing - Received, Clerk's Office, July 10, 2009

 
EXHIBIT A

 
.
.
~r.t.
iJiAmeren
A
m
eren Services
Envin",mental, Safety
&:
Hellltlr
JI4.S54.4S11 (Phone)
JI4.554.4182 (Facsimile)
",jsmllliwood@ameren.com
November 1, 2001
Mr. Thomas G. McSwiggin, P.E.
Industrial Unit, Permit Section
I1Iinois Environmental Protection Agency
Division
of Water Pollution Control
1021 North Grand Avenue East
POBox 19276
Springfield IL 62794-9276
One Amcrt'll Plaza
1901 Chouteau Avenue
PO Box 66149
SI. LOllis. MO 63166.
6149
314.621.3222
RE:
Ameren Energy Generating Company - Coffeen Power Station
Supplemental Cooling Tower Construction Permit Application
Dear Mr. McSwiggin:
Enclosed are permit applications (WPC-PS-I, Schedule J, and Schedule
N)
for the
construction
of supplemental cooling towers at the Coffeen Power Station. The
supplemental cooling towers will enable the Station to have greater flexibility and control
to maintain compliance with condenser cooling water temperature limitations.
The supplemental cooling towers will intercept the circulating discharge, prior to release
at Outfall
020, and divert the water through the cooling towers as necessary to support
plant operation. Water from the cooling towers will be released through a new outfall
directly into Coffeen Lake. With the creation
ofthe new outfall, we recognize our
obligation to modify the existing Station NPDES permit before any releases occur from
the cooling towers. The NPDES modification application will be submitted separately to
the Agency within the next week.
As the Station desires to have the cooling towers operational before April 15, 2002,
Ameren Energy would sincerely appreciate the Agency expediting the review and
approval
of this construction permit application so that construction can begin no later
than December 15, 2001.
Please contact me ifthere are any questions relating to the enclosed construction permit
application.
Sincerely,
/
/ /
tf,4t/
/,J:r;5?~~
Michael J. Smallwood
Senior Environmental Engineer
Ameren Services As Affiliated Agent for Ameren Energy Generating Company
" subsidiary 01 Ameren CorporaflOn
Bcc: JCPfMJS
WQ3 .15.1
Lin(\a Daniels
John Romang
Terri Mackey

(Page 1 of 2)
Illinois Environmental Protection Agency
For IEPA Use:
Permit Section, Division
of Water Pollution Control
P. O. Box 19276
Springfield, Illinois
62794-9276
Application for Permit or Construction Approval
WPC-PS-l
1. Name and Location:
Arreren Energy Generating Corrpany - Coffeen Power Station
Name of project:
Supplemental cooling towers
Municipality
or
Township:
Coffeen
County:
Montgcrnery
----~--~-----------
2.
BriefD •• crlptionofProject:
Installation of 12 Evapco AT 428-1248 induced draft cooling towers,
and construction of all auxiliary corrponents for operation and diSCharge to Coffeen Lake
3.
Documents aeing Submitted: If the project involves any of the items listed below.
submit the
corresponding schedule. and check the appropriate
spaces.
Projoct
Private Sewer Connection/Extension .• . . . . . . . . .. AlB ____ _
Spray Irrigation .. .. .. .. . .. .. .. .. . .... H ____ _
_
Extension
Construct
Onty .................
C=====:
Sewage Treatment WorKs ............. .. ....... D
ExcessFlowTreatment ........... , . . . .. •• • .. .. E ____ _
un Station/Force Main ............... .. .. .... .. F ____ _
Septic
TanI<s .. . .. .. . . .. . . .. . • .. .. .... I
--,X---
Industriaf Treatment or Pretreatment .......
J _--;;;-__
=~=e~~~i~ .: :: ::::: : :::::: :. ~
==X===
Sludge Disposal "",,,,,,,,,,,,,,,,,,,,,,,,,, G _____ _
Trust Disclosure ....•................. T ____ _
Plans:
Tille
See at tached
Number of
Pages: __________ _
Specifications: TiUe
Number of BooksIPages: _______ _
~~mems(P~~S~)
___________________________________ _
4.
Land Trust: Is Ule project identified in item number 1 herein. for which a pennit is requested. to be constructed on land which is the subject of a
trust?
Yes__
No~
If yes, Schedule T (Trust Disclosure) must be completed and item number 7.1.1 must be signed by a beneficiary, trustee or trust officer.
5. This
is
an Application for
(Check Appropriate Una):
___ A.
Joint Construction and Operating Permit
_.:X~_B.
Authorization to Construction (See
Instructions) NPDES
Perm~
No
. lLooOOl08
____ C.
Construct
Only
PenmH (Does
Not
Include Operations)
___ D. Operate Onty Pemrit
(Does
NoI tnctude
Constructlon)
9/28/1998
Issue
Date
6.
Certifications and Approval:
7.
6.
1
Certificate by Design Engineer
(When required; refer to instruclion)
I hereby certify
that
I am familiar with
the
information contained in Ihis
application.
including the attached schedules
indicated
above, and that to
the
best of my knowledge and belief such information is true, complete and accurate. The plans and specifications (specifications other than Standard
Specifications
or
local
specifications
on
file with this Agency) as described above were prepared by me
or
under my direction.
Engineer __
...;T..;;h""Or.1:;;;
.
a::..:s~R,,",
...;~",lh,-,i",t",e
____________________ --,Q<.>6 ..
2~-."04:I;4""4,,,Q,,,2
__________________ _
Nane
Registration Nu.-
Seat
------~--~~~~~~-----------------
F~:,
___
_=~S~a~r~3~e~n~t~~&~L~u~n~d~y~!~L~L~C~----=---~----------------~--------~------~--~~~,,~"~"~'U"~,,~t
----------------
Address:
__
~5.:'.5-:-=E.:..a.:'.S.:'.t_M:..O=-n::.r=-07e=-S7t.:.r:...e=-e=-t=-=_=-___
~\\\\'!'~A.S
R
~"~.,
Ch
'
Ill"
60603
.~
...
O~:······-..Ift~
lcago,
lnOlS
,t~:"062-0444
'~~A'
PhoneNurnber
312-269'"S'!3~'
LICEN
02 \{(\i
Sgnature x ...
~,
,,-R4)~
~
1
PROFESS~g~AL:
.
Phone Number: 312-269-6137
S *\
ENGINEER
.: '
Certifications and Approvals for Permits:
...
'I..
'.
OF
,,*,
..
A
7.
'~tiiNO\'i'
/'4
1
Certificate by Applicant(s)
""'''//",.1/111111
IM/e hereby certify that I/we have read and thoroughly understand the conditions and requirements of this Application, and am/are authorized to
sign this application in accordance with
the
Rules and Regulatoos of the lUinois Poll
ution Control
Board.
I/We hereby agree to oonform with the
Standard Conditions and
with
any other Special Conditions made part of this Permit.

7.
1.
1 Name
of Applicant
fO< Permit
To Construct Ameren Energy Generating Coopany
Str...P1e Ameren
Zip Code 63103
Plaza, 1901 Chouteau Ave
(MC602)
C~
St. Inuis
State~
Signature
X
:z:.-:&
/~"h<'
Printed Name Michael
L.
Menne
Phone
Numbe< 314-554-2816
Tolle
Manager-EnviroMlental, Safety
&
Health Organization __________ _
7.1.2 Name of Applicant for Permit to Own and Operate
Ameren Energy Generating Coopany
State M:)
Zip
Cod. 63103
Stree~~~e~Amer~~en~~p~1~a~z~a~,~1~9~O~1:Ch~o~u~t~e:a:u~A~v~e~(MC:6~0~2~6ty
? -
St.
Louis
Signature
PrintedNameMichael
L.
~Nu~14-554-2816
- Environmental, Safet & Health
7.2
Attested (Required When Applicant Is a Unit of Government)
Signature X. ___________________
Date,_-,=-=....,..=,.....-=....,..-=-TotIe-=:~=:_:_=_:_
(City
CIe<1<.
Vilage CIerl<, SanitaIy
District Cleft<,
Etc.)
7.3
Applicants
from
llOn-9O"emmentai
applicants
which
are net slgned
by
the owner, must be signed
by
a principalexocutive officer of at least.
the
level of vice preSident, or a duty authorized representative.
7.4
Certificate By Intermediate Sewer Owner
I
hereby
certify
lhat (Please
check one):
___ 1
.
The
sewers to whict: this prc;act win be tributary tla'/o
a~~q:"'-lte
roSC!1'\t3
cap~.~ty
to transport the wastewater that wili;".;
c:,,;.Jo::-J
by this project without causing
a
violation
of
the Environmental Protection
Act or
Subtitle C, Chapter t,
or
___ 2
.
The Illinois Pollution
Control Board,
in PCB
dated _______ granted a variance from Subtitle C,
Chapter
I
to allow
construction
facitities that are the
subject
of this appication.
Name and location of sewer system to which this project will
be
tribulary:
______________________ _
Sewer System Owner, _________________________________________________________________ __
Street
C~
State
Zip Code
SignatureX
.
_______________________________________ Dae'--__________________ T4e __________ __
7.4.1 Additional Certificate By Intennediate Sewer Owner
I
hereby
certify
that
(Please check one):
___
1
.
The
sewers to which this project wiN be tributary have adequate reserve capacity to transport the wastewater
that
wi ..
be
added
by this
project withOut
causing a violation of
the
Environmental Protection Act
01'
Subtitle C, Chapter I, or
___
2,
Tho _
PoIution Control
Board,
in
PCB
dated
,granted a variance from Subtitle C,
Chapter I to allow construction and operation of the facilities that are the subject of this appUcation.
Name and toeation of sewer system to which this
project
will be tributary:
SewerSy~emOwner
_______________________________________________________ __
Street
City
State
Zip Code
Signature~X
__________________________
~----------~D~a~ta~--------~---------~~otIe~----------~
7
.
5
Certificate By Waste Treatment Works Owner
I hereby
certify
that (P1ease check one):
___
1
.
The waste b'eatment plant to
which
this proiect will
be
tributary has adequate reserve capacity to treat the wastewater that
wil
be added
by this project without causing a violation of the Environmental Protection Act or SubtiUe C, Chapter I. or
___ 2.
Tho
llioois Polution
Control Board, in
PCB, _____ _
dated _____ _
. granted a variance (rom Subtitle C,
Electronic Filing - Received, Clerk's Office, July 10, 2009

Chapter I to allow construction and operation of the facilities that are the subject of this application.
I also certify that the industrial waste discharges described in
the
appt;cation are capabfe of being treated by the treatment works.
Name and location of waste treatment
works
to which this project will be
fributary: _________________ _
TrealmenlWor1<s
Qwner. ________________________________ _
Street _____________________ ,City
Slale __ ZipCode, __ _
Signature X
Oale, ___________ Title, _____ _
This
IVJercy is
authorized 10 requirelhis information
under illinois
Revised Statules,
1979
,
Chapter
111 112,
Section
1039.
Disclosure 0/ this
information is required under thai Section. Failure 10 do so may prevent this form from being processed and could result in your application being
denied. This foon has been
approved by
the
Fonns
Managemenl
Center
.
WPC-PS-1.APP

ILLINOIS ENVIRONMENTAL PROTECTION AGENCY
DIVISION OF WATER POLLUTION CONTROL
PERMIT SECTION
Springfield, Illinois
62706
FOR IEPA USE:
LOG #
DATE RECEIVED:
SCHEDUlE
J INDUSTRIAL TREATMENT WORKS CONSTRUCTION OR PRETREATMENT WORKS
1.
NAME AND LOCATION:
1.1
NameofprojectAmeren
Enerqy Generating
1.2
Plant Location
cooling towers
Company-Coffeen Power Station - supplemental
1.2.1 NE1I4
&
SE 1/4
11
7N
Quarter Section
Section
Township
1.2.2
Latitude
_-i3i;9 __________
--oo~3;_
1.2.3
Longitude _____________
89
....::.~
23
3W
Range
75
33
PM.
"NORTH
"WEST
1.2.3
Name of USGS Quadrangle Map
(7.5
or
15
minute) __
G"'o::;f:.f:.e"e"n:=.... _____________ _
2.
NARRATIVE DESCRIPTION AND SCHEMATIC WASTE FLOW DIAGRAM: (see instructions)
Three existing supplemental cooling pond pumps will transport cooling water
to
12
induced draft cooling towers for additional supplemental cooling. The
period of cooling tower utilization will be dictated by plant operating conditions.
2.1
PRINCIPAL PRODUCTS:
electrical generation
2.2
PRINCIPALMWMATERIALS:
coal
3. DESCRIPTION OF TREATMENT FACILITIES:
3.1
Submita flow diagram through all treatment units showing size, volumes, detention times, organic loadings, surface settling
rate, weir overflow rate, and oIher pertinent design data. Include hydraulic profiles and description
of monitoring systems.
3.2
Waste Treatment Works is: Batch __ , Continuous __ , No. of Batches/day __ , No. ofShiftsiday __ _
3.3
Submit
plans and specifications for proposed construction.
3.4
Discharge is: Existing
, ; Will begin on
April
17« 2002.
4. DIRECT DISCHARGE IS TO: Receiving Stream
X
Municipal Sanitary Sewer _______ Municipal
storm or municipal combined sewer _____ _
If receiving stream or storm sewer are indicated complete the following:
Name of receiving stream
Coffeen Lake
: tributary to ______ . ____ _
tributary to
; tributary to
____________ _
5.
Is the treatment works subject to flooding? If so, what is the maximum flood elevation of record (in reference to the treatment works
datum) and what prOVisions have been made to eliminate the flooding hazard?
......!NA~
____________ _
6.
APPROXIMATE TIME SCHEDULE: Estimated construction schedule:
Start
of Construction 12/17/2001
; Date of Completion 6/01/2002
Operation Schedule
; Date Operation Begins 4(17/2002
100%
design load to be reached by year....::2:,::0:,::0:,:2=-__________________ _
7.
DESIGN LOADINGS
7.1
Design population equivalent (one population equivalent is
100
galions of wastewater per day, containing
0.17
pounds of
BOD, and
0.20
pounds of suspended solids;
BOD
; Suspended Solids ________ ; Flow __________
~
7
.
2
Design Average Flow Rate __________________________ MGD.
This
Agency is authorized to require trus information under IIWnoisRevised Statutes, 1979.
Chapter 111
112.
Section 1039, Oisdosure of this information is required under that Section.
Failure to
do so may prevent this form from
being
processed and coukj resuh in your
app~cation
being denied. This form has been approved by the Forms Management Center.
Electronic Filing - Received, Clerk's Office, July 10, 2009

7.3 Design Maximum Flow
Rate_----'2~8~8"_:_--------------------------
7.4 Design Minimum Flow Rate_..:
O
________________ --:-_________ _
7.5 Minimum 7-day,
100year low flow _______ _
cfs
________ MGD.
Minimum 7-day, 10-year flow obtained from ______________________ _
7.6
Dilution Ratio
__ ; ___ .
8. FLOW TO TREATMENT WORKS (if existingl:
8.1
Flow (last 12 months)
8.1 .1 AverageFlow _____ MGD
8.1.2 Maximum Flow
MGD
8.2 Equipment used in determining above flows ______________________ _
9. Has a preliminary engineering report for this project been submitted to this Agency for Approval?
Ves
No.JL. If so, when was it submitted and approved. Date Submitted __________ _
Certification
# ___________ _
Dated __ --:-_=====-___ _
10
. List Permits previously issued forthe facility: NPDES
operating pennit
ILOOOO108
MGD.
MGD.
11. Describe provisions for operation during contingencies such as
' power failures. flooding, peak loads, equipment failure,
maintenance shut downs and other emergencies.
Condenser cooling water will be purrped to the
supplemental cooling towers. The towers gravity drain into Coffeen Lake via a
new
outfall. The cooling towers will not be operated continuously. but will
be
utilized on an as-needed basis to supplement the cooling of the condenser cooling
water discharge.
12. Complete and submit Schedule G if sludge disposal will be required by this facility. NA
13
. WASTE CHARACTERISTICS: Schedule N ",us' be s"b'!litt.d.
14. TREAJMENT
WORKS OPERATOR CERTIFICATION: List names and certification numbers of certified operators:
SCHEDJ.APP
Electronic Filing - Received, Clerk's Office, July 10, 2009

This Agency is authorized to require this infonnation under Illinois
Revised Statutes. 1979.
Chapter1111/2.
Section 1039. DisdosUfe
of this information
is
required under thai
section.
Failure to do so
may
prevent this form from being processed and could result in
yoL< application
being
denied.
For IEPA Use:
LOG
#
DATE RECEIVED:
IWNOIS ENVIRONMENTAL PROTECTION AGENCY
DIVISION OF WATER POLLUTION CONTROL
PERMIT SECTION
Springfield. illinois 62794-9276
SCHEDULE N WASTE
CHARACTERISTICS
1.
Name of Project
Ameren
Energy Generating Corrpany - Coffeen Power Station - SUpplemental 0001-
2.
FLOW DATA
2.1
Average Flow (gpd)
2.
2
Maximum Daily Flow (gpd)
EXISTING
NA
NA
PRopoSED-DESIGN
unknown
288 . 000,000
~ng
towers
2.3
TEMPERATURE:
operational.
point.
Actual terrperature reduction fran cooling towers to be determined when
Thermal lirrdts established at edge of mixing zone remains at
the: compli~
Time of
Year
SUMMER
WINTER
Avg.lnlake
Temp. E
Avg. Effluenl
Tero
o
.
F
Max. Inlake
TempE.
2.4 Minimum 7oday. l().year flow: -,NA= ___ cfs _____ MGD.
2.
5 Dilution Ralio:
.....!NA= ___
~
____ _
2.
6 Stream
flow
rate at time of sampling_",NA"",, ___ cts _____ MGD.
Max. Temp.
Max
. Effluent
Outside Mixing
TemoF.
ZonaF
3. CHEMICAL CONSTITUENT EXisting Permitted Conditions __ ; Existing condilions __ ; Proposed Permilled Conditions __ .
Type of sample:
__ grab (time of collection ->
;
__ composite (Number of samples per day -.l
(see instructions for analyses required)
See note following.
RAW WASTE
TREATED EFFLUENT
UPSTREAM
DOWNSTREAM SAMPLES
CONSTITUENT
(mg/l)
Avg.
(mgJI)
Max.
(mgll)
(mgll)
Ammonia Nitrogen (as N)
Arsenic (total)
Barium
Boron
BOD,
Cadmium
Carbon Chloroform Extract
-
Chloride
Chromium (total
hexavalent)
Chromium (tolal
Iribalenl)
Electronic Filing - Received, Clerk's Office, July 10, 2009

Copper
Cyanide (total)
RAW WASTE
TREATED EFFLUENT
UPSTREAM
DOWNSTREAM SAMPLES
(mgJl)
Avg.
(rr9I)
Max.
(mgJ1)
(mg/I)
CONSTITUENT
Cyanide (readily released
@
150. F & pH 4.5)
Dissolved Oxygen
Fecal Coliform
Fluoride
Hardness (as Ca CO.)
Iron (total)
Lead
Manganese
MBAS
Mercury
Nickel
Nitrates (as N)
OU & Grease (hexane
solubles or equivalent)
Organic Nitrogen (as N)
pH
Phenols
Phosphorous
(as P)
Radioactivity
Selenium
Silver
Sulfate
Suspended
Solids
Total Dissolved Solids
Zinc
Others
.
.
l'm'E: Not Applicable. Water is withdrawn from Coffeen Lake and passed through condensers in
the plant. Water terrperature is increased
in
the condensers and the water returned to Coffeen
Lake. The supplemental cooling towers will provide additional heat dissipation prior to water
discharging to lake. No chemical constituents are added to water other than heat.
Electronic Filing - Received, Clerk's Office, July 10, 2009

Ameren Energy Generating Company - Coffeen Power Station
Supplemental Cooling Tower Project
Plans and Drawings
Project Executive Summary
Drawing SK-05102000: Process Flow Diagram
Drawing S-863 : Lake Structures - General Arrangement
Drawing S-887: Cooling Tower Sections
&
Details
Drawing
SK-l: Coffeen Power Station Location
Drawing SK-2: Property Plat, Unit No. 1
&
2, Coffeen Power Station
Drawing SK-3: Lake Structures, General Arrangement

Ameren Energy Generating Company - Coffeen Power Station
Supplemental Cooling Tower Project Executive Summary
General Scope o(Work:
Civil, structural, mechanical and electrical engineering package.
Three of the existing vertical turbine pumps will be used to supply water to twelve new
cooling towers. Each
pump will be dedicated to four towers.
The existing piping will be modified and abandoned in place.
Civil work will
be performed to supply a clear and level area for placement ofthe cooling
towers (approximately 240
ft. long x 150 ft. wide).
New concrete and steel structures will be provided for support ofthe cooling towers.
Flumes will be provided to direct the tempered water toward the lake channel.
A final riprap cascade will
be provided to direct the tempered water to the lake channel.
Installation
of the cooling towers including rigging, assembly, piping and electrical work.
Equipment:
Qty: 12
Evapco AT 428-1248
Induced Draft
Cooling Towers
4 cell / 4 fan arrangement (each tower)
460 volt! 60
hzJ
3 phase
High efficiency totally enclosed fan cooled motors
Heavy duty Power Band Drive System
Ll 0/75,000 hr. pillow block bearings with extended lube lines
G235 Galvanized steel construction
PVC fill, eliminators and water distribution systems
Large orifice distribution nozzles with ant-sludge ring
Beveled and grooved inlet and outlet connections
Motor davit with base
5 year motor and drive warranty
NEMA 4X custom electrical panels to include:
motor starters for each motor
65KAIC circuit breakers for each motor
main on-protecting electrical disconnect with
pad lockable handle
time delay between motor starts
hand-off-auto switches with indicator lights
control power transformer and terminals for remote control
Electrical Consumption:
Each tower has (4) 75 HP motors operating at 460 volts and 54.5 kW.
Each tower will consume 218
kW at full load, or 2,616 kW for all 12 towers at full load.

Civil and Structural Work:
All required excavating and backfill of the proposed cooling tower location is included
(approximately 240
ft. long x 150 ft. wide).
Concrete and steel structures will be furnished to support the cooling towers. A flume consisting
of concrete walls and riprap bottom will be provided to direct the tempered water, toward a riprap
cascade that will deliver the tempered water to the lake channel. Gravel and weed guard will
be
provided in between the cooling towers.
Mechanical Installation:
Included as part of this proposed project is the labor and material required to install and pipe the
proposed cooling towers. This will include:
rigging and setting
of the cooling towers
assembly
of the cooling towers
cutting
of the existing piping
piping and piping supports from the existing piping to the cooling towers
manual shut-off valves at each cooling tower cell
painting
of the new piping
Electrical Installation:
Labor and materials for the electrical installation is provided as follows:
Two new low voltage switchgear, unit substation transformers (2,000 KV A) and medium
voltage switches will
be furnished and installed.
Wiring in conduit to all terminations for cooling tower fans and associated motor control
centers.
Wiring in conduit back to electrical supply in existing pump house.
Control signal wiring to each motor control center.
Proper grounding rods will be provided.
Electronic Filing - Received, Clerk's Office, July 10, 2009

 
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Electronic Filing - Received, Clerk's Office, July 10, 2009

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GENERAL ARRANGEMENT
COFFEEN POWER STATION
UNITS 1 AND 2
AIoIEREN SERvICES. INC
COfFEEN. IllINOIS
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EXHIBIT B
Phosphorus Water Quality Analysis and Internal Loading
Calculations
Electronic Filing - Received, Clerk's Office, July 10, 2009

Seasonal Phosphorus Comparison
Seasonal phosphorus comparisons within Coffeen Lake were made after incorporating additional
phosphorus data used in the 2009 TMDL (Illinois EPA, 2009a) with the Illinois EPA 2007
TMDL dataset (Illinois EPA, 2007). Results were consistent with the 2007 TMDL.
Table A-1. Phosphorus Data Used for Seasonal Comparison Between 1989 and 2008
Station ID
Date Sampled
Characteristic Name
Concentration
(mg/L)
ROG-1
4/27/1989
Total Phosphorus
0.04
ROG-1
4/27/1989
Total Phosphorus
0.06
ROG-1
4/28/1993
Total Phosphorus
0.11
ROG-1
4/28/1993
Total Phosphorus
0.11
ROG-1
4/14/1997
Total Phosphorus
0.08
ROG-1
4/14/1997
Total Phosphorus
0.09
ROG-1
4/18/2002
Total Phosphorus
0.041
ROG-1
4/18/2002
Total Phosphorus
0.066
ROG-2
4/27/1989
Total Phosphorus
0.024
ROG-2
4/28/1993
Total Phosphorus
0.117
ROG-2
4/14/1997
Total Phosphorus
0.077
ROG-2
4/18/2002
Total Phosphorus
0.041
ROG-3
4/27/1989
Total Phosphorus
0.04
ROG-3
4/28/1993
Total Phosphorus
0.12
ROG-3
4/18/2002
Total Phosphorus
0.144
Lake at Cribhouse
4/25/2006
Total Phosphorus
0.18
Lake at Cribhouse
4/18/2007
Total Phosphorus
0.21
Lake at Cribhouse
4/16/2008
Total Phosphorus
0.12
ROG-1
6/23/1977
Total Phosphorus
0.01
ROG-1
6/15/1989
Total Phosphorus
0.04
ROG-1
6/15/1989
Total Phosphorus
0.09
ROG-1
6/16/1993
Total Phosphorus
0.12
ROG-1
6/16/1993
Total Phosphorus
0.08
ROG-1
6/2/1997
Total Phosphorus
0.05
ROG-1
6/19/2002
Total Phosphorus
0.212
ROG-1
6/19/2002
Total Phosphorus
0.098
ROG-2
6/23/1977
Total Phosphorus
0.02
ROG-2
6/15/1989
Total Phosphorus
0.055
ROG-2
6/16/1993
Total Phosphorus
0.066
ROG-2
6/2/1997
Total Phosphorus
0.045
ROG-2
6/19/2002
Total Phosphorus
0.088
ROG-3
6/23/1977
Total Phosphorus
0.09
ROG-3
6/15/1989
Total Phosphorus
0.08
Electronic Filing - Received, Clerk's Office, July 10, 2009

Station ID
Date Sampled
Characteristic Name
Concentration
(mg/L)
ROG-3
6/16/1993
Total Phosphorus
0.06
ROG-3
6/2/1997
Total Phosphorus
0.08
ROG-3
6/19/2002
Total Phosphorus
0.121
Lake at Cribhouse
6/27/2006
Total Phosphorus
0.11
Lake at Cribhouse
6/25/2007
Total Phosphorus
0.1
Lake at Cribhouse
6/18/2008
Total Phosphorus
0.12
ROG-1
7/11/1989
Total Phosphorus
0.19
ROG-1
7/11/1989
Total Phosphorus
0.04
ROG-1
7/8/1993
Total Phosphorus
0.06
ROG-1
7/8/1993
Total Phosphorus
0.06
ROG-1
7/1/1997
Total Phosphorus
0.04
ROG-1
7/1/1997
Total Phosphorus
0.05
ROG-1
7/22/2002
Total Phosphorus
0.096
ROG-1
7/22/2002
Total Phosphorus
0.368
ROG-2
7/11/1989
Total Phosphorus
0.024
ROG-2
7/8/1993
Total Phosphorus
0.055
ROG-2
7/1/1997
Total Phosphorus
0.023
ROG-2
7/22/2002
Total Phosphorus
0.08
ROG-3
7/11/1989
Total Phosphorus
1.52
ROG-3
7/8/1993
Total Phosphorus
0.08
ROG-3
7/1/1997
Total Phosphorus
0.06
ROG-3
7/22/2002
Total Phosphorus
0.087
Lake at Cribhouse
7/24/2006
Total Phosphorus
0.11
Lake at Cribhouse
7/23/2007
Total Phosphorus
0.1
Lake at Cribhouse
7/16/2008
Total Phosphorus
0.1
ROG-1
8/8/1989
Total Phosphorus
0.03
ROG-1
8/8/1989
Total Phosphorus
0.53
ROG-1
8/19/1993
Total Phosphorus
0.26
ROG-1
8/19/1993
Total Phosphorus
0.08
ROG-1
8/4/1997
Total Phosphorus
0.21
ROG-1
8/4/1997
Total Phosphorus
0.04
ROG-1
8/22/2002
Total Phosphorus
0.081
ROG-1
8/22/2002
Total Phosphorus
0.081
ROG-2
8/8/1989
Total Phosphorus
0.024
ROG-2
8/19/1993
Total Phosphorus
0.07
ROG-2
8/4/1997
Total Phosphorus
0.048
ROG-2
8/22/2002
Total Phosphorus
0.065
ROG-3
8/8/1989
Total Phosphorus
0.05
ROG-3
8/19/1993
Total Phosphorus
0.07

Station ID
Date Sampled
Characteristic Name
Concentration
(mg/L)
ROG-3
8/4/1997
Total Phosphorus
0.07
ROG-3
8/22/2002
Total Phosphorus
0.075
Lake at Cribhouse
8/28/2006
Total Phosphorus
0.1
Lake at Cribhouse
8/28/2007
Total Phosphorus
0.1
Lake at Cribhouse
8/19/2008
Total Phosphorus
0.1
ROG-1
10/12/1989
Total Phosphorus
0.28
ROG-1
10/12/1989
Total Phosphorus
0.06
ROG-1
10/14/1993
Total Phosphorus
0.11
ROG-1
10/14/1993
Total Phosphorus
0.1
ROG-1
10/14/1993
Total Phosphorus
0.12
ROG-1
10/2/1997
Total Phosphorus
0.13
ROG-1
10/2/1997
Total Phosphorus
0.04
ROG-1
10/11/2002
Total Phosphorus
0.103
ROG-1
10/11/2002
Total Phosphorus
0.099
ROG-2
10/12/1989
Total Phosphorus
0.064
ROG-2
10/14/1993
Total Phosphorus
0.098
ROG-2
10/2/1997
Total Phosphorus
0.032
ROG-2
10/11/2002
Total Phosphorus
0.068
ROG-3
10/12/1989
Total Phosphorus
0.07
ROG-3
10/2/1997
Total Phosphorus
0.05
ROG-3
10/11/2002
Total Phosphorus
0.063
Lake at Cribhouse
10/31/2006
Total Phosphorus
0.14
Lake at Cribhouse
10/25/2007
Total Phosphorus
0.1
Lake at Cribhouse
10/15/2008
Total Phosphorus
0.1
Data Sources: Illinois EPA (2007). Greenville Lake and Coffeen Lake TMDL. August 2007.
Illinois EPA (2009). Coffeen Lake and East Fork Shoal Creek TMDL Addendum. June 2009.
Table A-2. Regression Statistics for Seasonal Phosphorus Comparisons
Regression Statistics
Multiple R
0.023
R Square
0.0005
Adjusted R Square
-0.010
Standard Error
0.163
Observations
96
Table A-3. ANOVA Summary Statistics for Seasonal Phosphorus Comparisons
Coefficients
Standard
Error
t Stat
P-value
Lower
95%
Upper
95%
Lower
95.0%
Upper
95.0%
Intercept
0.096
0.062
1.553
0.124
-0.027
0.218
-0.027
0.218
X Variable 1
0.002
0.008
0.225
0.822
-0.015
0.019
-0.015
0.019
Electronic Filing - Received, Clerk's Office, July 10, 2009

Comparison of Phosphorus and Chlorophyll-A by Station
Mean phosphorus and chlorophyll-a concentrations were found to be elevated at ROG-3 as
compared to ROG-1 and ROG-2. Chlorophyll-a concentrations at ROG-3 were approximately
68 and 24 percent greater than ROG-1 and ROG-2 respectively. Mean phosphorus
concentrations at ROG-3 measured approximately 28 and 64 percent greater than ROG-1 and
ROG-2 respectively.
Comparison of mean monthly chlorophyll-a concentrations between monitoring stations reveals
that ROG-3 maintains elevated chlorophyll-a concentrations during all summer months,
particularly when compared to ROG-1. During these months, chlorophyll-a concentrations at
ROG-3 were between 37-77 percent greater than ROG-1. Mean phosphorus concentrations were
also highest at ROG-3, which contained the greatest range of phosphorus concentrations (0.04-
2.52 mg/L) of all stations.
Table A-4. Phosphorus Data by Station and Month
Station
Date
Sampled
Parameter
Result (mg/l)
ROG-1
4/27/1989
Total Phosphorus
0.04
ROG-1
4/27/1989
Total Phosphorus
0.06
ROG-1
4/28/1993
Total Phosphorus
0.11
ROG-1
4/28/1993
Total Phosphorus
0.11
ROG-1
4/14/1997
Total Phosphorus
0.08
ROG-1
4/14/1997
Total Phosphorus
0.09
ROG-1
4/18/2002
Total Phosphorus
0.041
ROG-1
4/18/2002
Total Phosphorus
0.066
ROG-1
6/23/1977
Total Phosphorus
0.01
ROG-1
6/15/1989
Total Phosphorus
0.04
ROG-1
6/15/1989
Total Phosphorus
0.09
ROG-1
6/16/1993
Total Phosphorus
0.12
ROG-1
6/16/1993
Total Phosphorus
0.08
ROG-1
6/2/1997
Total Phosphorus
0.05
ROG-1
6/19/2002
Total Phosphorus
0.212
ROG-1
6/19/2002
Total Phosphorus
0.098
ROG-1
7/11/1989
Total Phosphorus
0.19
ROG-1
7/11/1989
Total Phosphorus
0.04
ROG-1
7/8/1993
Total Phosphorus
0.06
ROG-1
7/8/1993
Total Phosphorus
0.06
ROG-1
7/1/1997
Total Phosphorus
0.04
ROG-1
7/1/1997
Total Phosphorus
0.05
ROG-1
7/22/2002
Total Phosphorus
0.096
ROG-1
7/22/2002
Total Phosphorus
0.368
Electronic Filing - Received, Clerk's Office, July 10, 2009

Station
Date
Sampled
Parameter
Result (mg/l)
ROG-1
8/8/1989
Total Phosphorus
0.03
ROG-1
8/8/1989
Total Phosphorus
0.53
ROG-1
8/19/1993
Total Phosphorus
0.26
ROG-1
8/19/1993
Total Phosphorus
0.08
ROG-1
8/4/1997
Total Phosphorus
0.21
ROG-1
8/4/1997
Total Phosphorus
0.04
ROG-1
8/22/2002
Total Phosphorus
0.081
ROG-1
8/22/2002
Total Phosphorus
0.081
ROG-1
10/12/1989
Total Phosphorus
0.28
ROG-1
10/12/1989
Total Phosphorus
0.06
ROG-1
10/14/1993
Total Phosphorus
0.11
ROG-1
10/14/1993
Total Phosphorus
0.1
ROG-1
10/14/1993
Total Phosphorus
0.12
ROG-1
10/2/1997
Total Phosphorus
0.13
ROG-1
10/2/1997
Total Phosphorus
0.04
ROG-1
10/11/2002
Total Phosphorus
0.103
ROG-1
10/11/2002
Total Phosphorus
0.099
ROG-2
4/27/1989
Total Phosphorus
0.024
ROG-2
4/28/1993
Total Phosphorus
0.117
ROG-2
4/14/1997
Total Phosphorus
0.077
ROG-2
4/18/2002
Total Phosphorus
0.041
ROG-2
6/23/1977
Total Phosphorus
0.02
ROG-2
6/15/1989
Total Phosphorus
0.055
ROG-2
6/16/1993
Total Phosphorus
0.066
ROG-2
6/2/1997
Total Phosphorus
0.045
ROG-2
6/19/2002
Total Phosphorus
0.088
ROG-2
7/11/1989
Total Phosphorus
0.024
ROG-2
7/8/1993
Total Phosphorus
0.055
ROG-2
7/1/1997
Total Phosphorus
0.023
ROG-2
7/22/2002
Total Phosphorus
0.08
ROG-2
8/8/1989
Total Phosphorus
0.024
ROG-2
8/19/1993
Total Phosphorus
0.07
ROG-2
8/4/1997
Total Phosphorus
0.048
ROG-2
8/22/2002
Total Phosphorus
0.065
ROG-2
10/12/1989
Total Phosphorus
0.064
ROG-2
10/14/1993
Total Phosphorus
0.098
ROG-2
10/2/1997
Total Phosphorus
0.032
ROG-2
10/11/2002
Total Phosphorus
0.068
Electronic Filing - Received, Clerk's Office, July 10, 2009

Station
Date
Sampled
Parameter
Result (mg/l)
ROG-3
4/27/1989
Total Phosphorus
0.04
ROG-3
4/28/1993
Total Phosphorus
0.12
ROG-3
4/18/2002
Total Phosphorus
0.144
ROG-3
6/23/1977
Total Phosphorus
0.09
ROG-3
6/15/1989
Total Phosphorus
0.08
ROG-3
6/16/1993
Total Phosphorus
0.06
ROG-3
6/2/1997
Total Phosphorus
0.08
ROG-3
6/19/2002
Total Phosphorus
0.121
ROG-3
7/11/1989
Total Phosphorus
1.52
ROG-3
7/8/1993
Total Phosphorus
0.08
ROG-3
7/1/1997
Total Phosphorus
0.06
ROG-3
7/22/2002
Total Phosphorus
0.087
ROG-3
8/8/1989
Total Phosphorus
0.05
ROG-3
8/19/1993
Total Phosphorus
0.07
ROG-3
8/4/1997
Total Phosphorus
0.07
ROG-3
8/22/2002
Total Phosphorus
0.075
ROG-3
10/12/1989
Total Phosphorus
0.07
ROG-3
10/2/1997
Total Phosphorus
0.05
ROG-3
10/11/2002
Total Phosphorus
0.063
Data Source: Illinois EPA (2007)
Table A-5. Chlorophyll-A Data by Station and Month
Station
Date Sampled
Parameter
Result (μg/l)
ROG-1
4/27/1989
CHLOROPHYL-A
7.63
ROG-1
4/28/1993
CHLOROPHYL-A
4.61
ROG-1
4/14/1997
CHLOROPHYL-A
4.26
ROG-1
4/18/2002
CHLOROPHYL-A
26.6
ROG-1
6/15/1989
CHLOROPHYL-A
8.23
ROG-1
6/16/1993
CHLOROPHYL-A
5.36
ROG-1
6/2/1997
CHLOROPHYL-A
4.68
ROG-1
6/19/2002
CHLOROPHYL-A
16.3
ROG-1
7/11/1989
CHLOROPHYL-A
11.3
ROG-1
7/8/1993
CHLOROPHYL-A
5.2
ROG-1
7/1/1997
CHLOROPHYL-A
13.17
ROG-1
7/22/2002
CHLOROPHYL-A
16.2
ROG-1
8/19/1993
CHLOROPHYL-A
10.82
ROG-1
8/4/1997
CHLOROPHYL-A
13.26
ROG-1
8/22/2002
CHLOROPHYL-A
15.3
Electronic Filing - Received, Clerk's Office, July 10, 2009

Station
Date Sampled
Parameter
Result (μg/l)
ROG-1
10/12/1989
CHLOROPHYL-A
7.43
ROG-1
10/14/1993
CHLOROPHYL-A
3.8
ROG-1
10/2/1997
CHLOROPHYL-A
3.01
ROG-1
10/11/2002
CHLOROPHYL-A
7.44
ROG-2
4/27/1989
CHLOROPHYL-A
11.5
ROG-2
4/28/1993
CHLOROPHYL-A
13.6
ROG-2
4/14/1997
CHLOROPHYL-A
2.8
ROG-2
4/18/2002
CHLOROPHYL-A
23.9
ROG-2
6/15/1989
CHLOROPHYL-A
14.5
ROG-2
6/16/1993
CHLOROPHYL-A
11.1
ROG-2
6/2/1997
CHLOROPHYL-A
108.3
ROG-2
6/19/2002
CHLOROPHYL-A
16.8
ROG-2
7/11/1989
CHLOROPHYL-A
22
ROG-2
7/8/1993
CHLOROPHYL-A
11.8
ROG-2
7/8/1993
CHLOROPHYL-A
11.8
ROG-2
7/1/1997
CHLOROPHYL-A
16.8
ROG-2
7/22/2002
CHLOROPHYL-A
24
ROG-2
8/8/1989
CHLOROPHYL-A
15.7
ROG-2
8/19/1993
CHLOROPHYL-A
12.7
ROG-2
8/19/1993
CHLOROPHYL-A
16.4
ROG-2
8/4/1997
CHLOROPHYL-A
17.9
ROG-2
8/22/2002
CHLOROPHYL-A
18.9
ROG-2
10/12/1989
CHLOROPHYL-A
9
ROG-2
10/14/1993
CHLOROPHYL-A
10
ROG-2
10/2/1997
CHLOROPHYL-A
5.2
ROG-2
10/11/2002
CHLOROPHYL-A
17.7
ROG-3
4/27/1989
CHLOROPHYL-A
20.83
ROG-3
4/28/1993
CHLOROPHYL-A
5.78
ROG-3
4/14/1997
CHLOROPHYL-A
26.83
ROG-3
4/18/2002
CHLOROPHYL-A
61.4
ROG-3
6/15/1989
CHLOROPHYL-A
53.12
ROG-3
6/16/1993
CHLOROPHYL-A
27.18
ROG-3
6/2/1997
CHLOROPHYL-A
3.91
ROG-3
6/19/2002
CHLOROPHYL-A
67.4
ROG-3
7/11/1989
CHLOROPHYL-A
29.62
ROG-3
7/8/1993
CHLOROPHYL-A
14.94
ROG-3
7/1/1997
CHLOROPHYL-A
11.02
ROG-3
7/22/2002
CHLOROPHYL-A
16.9
ROG-3
8/8/1989
CHLOROPHYL-A
20.84
ROG-3
8/4/1997
CHLOROPHYL-A
21.71
Electronic Filing - Received, Clerk's Office, July 10, 2009

Station
Date Sampled
Parameter
Result (μg/l)
ROG-3
8/22/2002
CHLOROPHYL-A
20.2
ROG-3
10/12/1989
CHLOROPHYL-A
20.01
ROG-3
10/14/1993
CHLOROPHYL-A
24.52
ROG-3
10/2/1997
CHLOROPHYL-A
7.1
ROG-3
10/11/2002
CHLOROPHYL-A
12.7
Data Source: Illinois EPA (2007)

Comparison of Suspend Solids by Station and Month
The majority of the Total Suspended Solids (TSS) values, a leading contributing factor to
turbidity, reported for Coffeen Lake provided in the 2007 TMDL (Illinois EPA, 2007) were
under 20 mg/L. Comparing between stations, ROG-3 was determined to have statistically higher
concentrations of TSS than ROG-1 and ROG-2.
Table A-6. Total Suspended Solids Data by Station and Month
Station
Date Sampled
Parameter
Value (mg/L)
ROG-1
6/23/1977
TSS
6
ROG-1
4/27/1989
TSS
10
ROG-1
4/27/1989
TSS
4
ROG-1
6/15/1989
TSS
2
ROG-1
6/15/1989
TSS
4
ROG-1
7/11/1989
TSS
13
ROG-1
7/11/1989
TSS
35
ROG-1
8/8/1989
TSS
100
ROG-1
8/8/1989
TSS
7
ROG-1
10/12/1989
TSS
7
ROG-1
10/12/1989
TSS
9
ROG-1
4/28/1993
TSS
5
ROG-1
4/28/1993
TSS
6
ROG-1
6/16/1993
TSS
12
ROG-1
6/16/1993
TSS
6
ROG-1
7/8/1993
TSS
2
ROG-1
7/8/1993
TSS
7
ROG-1
8/19/1993
TSS
11
ROG-1
8/19/1993
TSS
8
ROG-1
10/14/1993
TSS
1
ROG-1
10/14/1993
TSS
4
ROG-1
10/14/1993
TSS
3
ROG-1
4/14/1997
TSS
10
ROG-1
4/14/1997
TSS
12
ROG-1
6/2/1997
TSS
11
ROG-1
7/1/1997
TSS
5
ROG-1
7/1/1997
TSS
7
ROG-1
8/4/1997
TSS
4
ROG-1
8/4/1997
TSS
4
ROG-1
10/2/1997
TSS
6
ROG-1
10/2/1997
TSS
7
ROG-1
4/18/2002
TSS
12
ROG-1
4/18/2002
TSS
8
Electronic Filing - Received, Clerk's Office, July 10, 2009

Station
Date Sampled
Parameter
Value (mg/L)
ROG-1
6/19/2002
TSS
20
ROG-1
6/19/2002
TSS
12
ROG-1
7/22/2002
TSS
9
ROG-1
7/22/2002
TSS
7
ROG-1
8/22/2002
TSS
3
ROG-1
8/22/2002
TSS
3
ROG-1
10/11/2002
TSS
3
ROG-1
10/11/2002
TSS
3
ROG-2
8/19/1993
TSS
10
ROG-2
10/14/1993
TSS
1
ROG-2
4/14/1997
TSS
8
ROG-2
6/2/1997
TSS
8
ROG-2
7/1/1997
TSS
5
ROG-2
8/4/1997
TSS
8
ROG-2
10/2/1997
TSS
5
ROG-2
4/18/2002
TSS
8
ROG-2
6/19/2002
TSS
17
ROG-2
7/22/2002
TSS
6
ROG-2
8/22/2002
TSS
4
ROG-2
10/11/2002
TSS
3
ROG-2
6/23/1977
TSS
6
ROG-2
4/27/1989
TSS
1
ROG-2
6/15/1989
TSS
2
ROG-2
7/11/1989
TSS
4
ROG-2
8/8/1989
TSS
4
ROG-2
10/12/1989
TSS
4
ROG-2
4/28/1993
TSS
16
ROG-2
6/16/1993
TSS
7
ROG-2
7/8/1993
TSS
3
ROG-3
4/27/1989
TSS
4
ROG-3
6/15/1989
TSS
4
ROG-3
7/11/1989
TSS
9
ROG-3
8/8/1989
TSS
10
ROG-3
10/12/1989
TSS
8
ROG-3
4/28/1993
TSS
15
ROG-3
6/16/1993
TSS
13
ROG-3
8/19/1993
TSS
8
ROG-3
4/14/1997
TSS
13
ROG-3
6/2/1997
TSS
17
ROG-3
7/1/1997
TSS
7
Electronic Filing - Received, Clerk's Office, July 10, 2009

Station
Date Sampled
Parameter
Value (mg/L)
ROG-3
8/4/1997
TSS
10
ROG-3
10/2/1997
TSS
12
ROG-3
4/18/2002
TSS
27
ROG-3
6/19/2002
TSS
17
ROG-3
7/22/2002
TSS
12
ROG-3
8/22/2002
TSS
7
ROG-3
10/11/2002
TSS
5
ROG-3
6/23/1977
TSS
47
Data Source: Illinois EPA (2007)
Table A-7. ANOVA Analysis of Total Suspended Solids by Station
ROG-1
ROG-2
ROG-3
ROG-1
1.000
ROG-2
0.493
1.000
ROG-3
0.665
0.203
1.000
Table A-8. ANOVA Analysis of Total Suspended Solids by Month
April
August
July
June
October
April
1.000
August
0.975
1.000
July
0.999
0.911
1.000
June
0.993
1.000
0.958
1.000
October
0.800
0.433
0.922
0.525
1.000
Electronic Filing - Received, Clerk's Office, July 10, 2009

Internal Loading Calculations
Estimates of average depth to anoxia and number of anoxic days per month were made using
water profile data from the Southern Illinois University at Carbondale (SIUC) annual monitoring
reports (SIUC, 2006 and SIUC, 2007).
Table A-9. Water Quality Profile Data by Year from SIUC Reports for Segment 1
Date
Bottom
Depth (m)
Depth <1.0
mg/L O2 (m)
Anoxic Depth (m)
Stratified
?
Depth to thermocline
(m)
1/18/2001
9.5
9.5
0
Y
1.5
1/19/2001
10
10
0
Y
1.5
2/27/2001
9
9
0
Y
1.8
3/30/2001
8.5
8.5
0
Y
1.5
4/25/2001
7.5
7.5
0
Y
2.9
5/9/2001
8
8
0
Y
2.7
5/24/2001
11
11
0
Y
8
6/8/2001
9
9
0
Y
2.7
6/13/2001
9
9
0
Y
4.0
6/19/2001
8.5
8.5
0
Y
2.4
6/25/2001
8.5
7.5
1
Y
2.4
7/3/2001
9
6.5
2.5
Y
3.0
7/10/2001
8.5
6.5
2
Y
2.4
7/19/2001
8.5
6
2.5
Y
2.4
7/24/2001
8.5
5.5
3
Y
2.7
8/8/2001
8.5
6
2.5
Y
2.0
8/15/2001
8.5
4
4.5
Y
3.5
8/22/2001
9.5
8
1.5
Y
2.1
8/29/2001
8.5
6
2.5
Y
2.7
9/5/2001
8
5.5
2.5
Y
2.9
9/19/2001
8.5
6
2.5
Y
2.7
10/22/2001
8
8
0
Y
6
11/27/2001
8
8
0
Y
4.0
12/11/2001
8.5
8.5
0
Y
1.2
6/8/2003
8
7
1
Y
4.3
6/17/2003
10
7
3
Y
2.0
6/23/2003
9.5
5.5
4
Y
1.2
7/1/2003
9.5
7
2.5
Y
7.5
7/8/2003
9.5
6
3.5
Y
7.9
7/15/2003
9.5
6
3.5
Y
8
7/24/2003
11
3.5
7.5
Y
8
7/30/2003
10
3.5
6.5
Y
8
8/6/2003
10
6
4
Y
8

Date
Bottom
Depth (m)
Depth <1.0
mg/L O2 (m)
Anoxic Depth (m)
Stratified
?
Depth to thermocline
(m)
8/13/2003
9.5
4.5
5
Y
8
8/20/2003
9.5
5.5
4
Y
6.7
8/27/2003
9
6.5
2.5
Y
8.0
9/3/2003
9.5
8
1.5
Y
8
9/10/2003
9.5
6
3.5
Y
8.5
9/18/2003
9
6.5
2.5
Y
2.0
9/26/2003
9
4
5
Y
1.3
10/2/2003
8.5
7
1.5
Y
2.0
5/5/2004
10
9.5
0.5
Y
7
5/12/2004
10
7
3
Y
4.0
5/19/2004
10
8.5
1.5
Y
8.0
5/26/2004
10.5
8
2.5
Y
8.0
6/2/2004
10.5
7
3.5
Y
8.5
6/9/2004
10
6.5
3.5
Y
1.5
6/16/2004
10
5.5
4.5
Y
8
6/23/2004
10
4
6
Y
8
6/30/2004
10
4
6
Y
8.5
7/7/2004
10
6
4
Y
8.9
7/14/2004
10
7
3
Y
8.9
7/21/2004
10
6.5
3.5
Y
8.5
7/28/2004
10.5
3
7.5
Y
1.9 & 8.5
8/4/2004
10.5
6
4.5
Y
9
8/11/2004
6
6
0
Y
2
8/18/2004
10.5
6
4.5
Y
9
8/25/2004
11.5
5.5
6
Y
1.8
9/1/2004
10
5.5
4.5
Y
6.7
9/10/2004
9.5
5.5
4
Y
1.5 & 8.5
9/15/2004
10
5.5
4.5
Y
9
9/22/2004
10
6
4
Y
8.5
6/3/2005
11
6.5
4.5
Y
9
6/8/2005
10.5
6
4.5
Y
8
6/16/2005
10
6
4
Y
7.9
6/21/2005
13
6
7
Y
7.9
6/28/2005
10.5
7
3.5
Y
5
7/7/2005
9.5
4
5.5
Y
1.5 & 8
7/13/2005
9.5
4.5
5
Y
7.9
7/20/2005
10
6
4
Y
8
7/27/2005
9.5
6
3.5
Y
6
8/2/2005
10
6
4
Y
7.6
8/9/2005
9.5
6.5
3
Y
7.9

Date
Bottom
Depth (m)
Depth <1.0
mg/L O2 (m)
Anoxic Depth (m)
Stratified
?
Depth to thermocline
(m)
8/18/2005
9.5
6
3.5
Y
8.5
8/23/2005
9
5
4
Y
8
8/31/2005
8.5
5.5
3
Y
2.4
9/8/2005
10
6.5
3.5
Y
8
9/14/2005
9
9
0
Y
8
9/21/2005
9.5
5.5
4
Y
8
9/29/2005
9.5
8
1.5
Y
8
5/4/2006
9
8
1
Y
2
5/11/2006
9.5
8
1.5
Y
3.7
5/18/2006
9.5
8.5
1
Y
8.5
5/25/2006
9.5
8
1.5
Y
1.5
6/1/2006
4
N/A
0
Y
1.8
6/9/2006
9
6
3
Y
8
6/15/2006
9.5
5.5
4
Y
6
6/22/2006
9
6.5
2.5
Y
2.4
6/29/2006
9
4.5
4.5
Y
7.3
7/6/2006
8.5
4.5
4
Y
7.4
7/13/2006
9
5
4
Y
8
7/19/2006
9
6
3
Y
7.6
7/27/2006
9
5.5
3.5
Y
7.6
8/3/2006
8.5
5.5
3
Y
7.6
8/10/2006
9
3.5
5.5
Y
8
8/18/2006
9
5
4
Y
8
8/24/2006
8.5
5
3.5
Y
7.6
8/30/2006
8
4.5
3.5
Y
2
9/6/2006
8.5
5
3.5
Y
1.5
9/12/2006
8.5
5.5
3
Y
7
9/19/2006
8
5
3
Y
3.0
9/28/2006
9
9
0
N
N
Data Source: SIUC 2006 and 2007

Table A-10. Water Quality Profile Data by Year from SIUC Reports for Segment 2
Date
Bottom
Depth (m)
Depth <1.0
mg/L O2 (m)
Anoxic Depth (m)
Stratifie
d?
Depth to thermocline
(m)
1/18/2001
11.5
11.5
0
Y
1.2
1/19/2001
11.5
11.5
0
N
N
2/27/2001
12
12
0
N
N
3/30/2001
12
12
0
Y
4.6
4/25/2001
11.5
11.5
0
Y
2.7
5/9/2001
13
13
0
Y
8.0
5/24/2001
11.5
9.5
2
Y
9.1
6/8/2001
13.5
12
1.5
Y
11.0
6/13/2001
12
12
0
Y
3.0
6/19/2001
9
9
0
Y
6.1
6/25/2001
12
11
1
Y
8.2
7/3/2001
12.5
8
4.5
Y
7.6
7/10/2001
12.5
8.5
4
Y
8.5
7/19/2001
12.5
8.5
4
Y
8.8
7/24/2001
12
8.5
3.5
Y
8.8
8/8/2001
11
6.5
4.5
Y
9.0
8/15/2001
11
9.5
1.5
Y
8.1
8/22/2001
12
10
2
Y
8.8
8/29/2001
11.5
9.5
2
Y
9.0
9/5/2001
12
7
5
Y
8.8
9/19/2001
4.5
4.5
0
N
N
10/22/2001
12
12
0
N
N
11/27/2001
12
12
0
N
N
12/11/2001
12
12
0
Y
2.0
6/8/2003
10.5
10
0.5
Y
3.4
6/17/2003
12.5
7.5
5
Y
1.5
6/23/2003
11
7
4
Y
2.4
7/1/2003
11.5
7.5
4
Y
7.6
7/8/2003
10.5
6
4.5
Y
7.9
7/15/2003
11
7.5
3.5
Y
8.0
7/24/2003
11.5
8.5
3
Y
7.5
7/30/2003
11
7.5
3.5
Y
8.5
8/6/2003
10.5
6.5
4
Y
8.5
8/13/2003
11
8
3
Y
8.1
8/20/2003
11
6
5
Y
7.9
8/27/2003
10
6.5
3.5
Y
8.0
9/3/2003
10
9
1
Y
7.5
9/10/2003
9.5
9
0.5
Y
9.5
9/18/2003
10.5
7
3.5
Y
8.8
Electronic Filing - Received, Clerk's Office, July 10, 2009

Date
Bottom
Depth (m)
Depth <1.0
mg/L O2 (m)
Anoxic Depth (m)
Stratifie
d?
Depth to thermocline
(m)
9/26/2003
10
9.5
0.5
Y
8.5
10/2/2003
10.5
10.5
0
N
N
5/5/2004
12
12
0
Y
1.5
5/12/2004
13.5
10
3.5
Y
5.0
5/19/2004
13
8.5
4.5
Y
7.3
5/26/2004
11.5
8
3.5
Y
7.9
6/2/2004
11.5
8
3.5
Y
7.8
6/9/2004
13
7
6
Y
8.2
6/16/2004
12.5
7
5.5
Y
7.6
6/23/2004
9.5
8
1.5
Y
8
6/30/2004
13
6.5
6.5
Y
9.5
7/7/2004
12.5
7.5
5
Y
9.0
7/14/2004
13
6.5
6.5
Y
9.1
7/21/2004
11.5
7.5
4
Y
8.5
7/28/2004
12
9
3
Y
9
8/4/2004
11.5
6.5
5
Y
9
8/11/2004
10
8
2
Y
8.5
8/18/2004
11
9
2
Y
9
8/25/2004
12
7.5
4.5
Y
7.9
9/1/2004
12.5
6.5
6
Y
9
9/10/2004
12.5
8.5
4
Y
8.5
9/15/2004
11
7
4
Y
9
9/22/2004
12
8
4
Y
8.5
6/3/2005
12.5
7.5
5
Y
8.5
6/8/2005
11.5
6
5.5
Y
8
6/16/2005
11.5
8
3.5
Y
7.6
6/21/2005
11.5
7.5
4
Y
7.9
6/28/2005
10.5
7
3.5
Y
8.0
7/7/2005
10.5
7.5
3
Y
7.9
7/13/2005
10.5
8.5
2
Y
8.5
7/20/2005
10.5
6
4.5
Y
8.5
7/27/2005
10.5
7.5
3
Y
7.6
8/2/2005
11
6
5
Y
8.5
8/9/2005
10.5
6.5
4
Y
8.1
8/18/2005
10
8.5
1.5
Y
7.9
8/23/2005
10
7.5
2.5
Y
8.2
8/31/2005
10
9
1
Y
8.1
9/8/2005
10
8.5
1.5
Y
8.0
9/14/2005
9.5
9.5
0
Y
7.6
9/21/2005
10
8.5
1.5
Y
9.1

Date
Bottom
Depth (m)
Depth <1.0
mg/L O2 (m)
Anoxic Depth (m)
Stratifie
d?
Depth to thermocline
(m)
9/29/2005
10
10
0
Y
9.0
5/4/2006
11.5
8.5
3
Y
5.0
5/11/2006
11
7.5
3.5
Y
3.7
5/18/2006
11
10
1
Y
1.5
5/25/2006
10.5
9.5
1
Y
0.9
6/1/2006
10.5
6.5
4
Y
4.6
6/9/2006
11
8
3
Y
8.1
6/15/2006
10
6
4
Y
8
6/22/2006
10
7.5
2.5
Y
2.0
6/29/2006
10.5
9
1.5
Y
8.1
7/6/2006
11
6.5
4.5
Y
8.1
7/13/2006
10
4.5
5.5
Y
7.6
7/19/2006
10.5
6
4.5
Y
8.1
7/27/2006
10
7
3
Y
7.6
8/3/2006
10
6.5
3.5
Y
7.0
8/10/2006
10
7.5
2.5
Y
7.9
8/18/2006
10
7.5
2.5
Y
8.0
8/24/2006
9.5
7
2.5
Y
8
8/30/2006
10
8
2
Y
8.0
9/6/2006
10
8.5
1.5
Y
8
9/12/2006
9.5
7.5
2
Y
8.0
9/19/2006
10
7
3
Y
7.9
9/28/2006
9
9
0
N
N
Data Source: SIUC 2006 and 2007

Table A-11. Water Quality Profile Data by Year from SIUC Reports for Segment 3
Date
Bottom Depth
(m)
Depth <1.0 mg/L
O2 (m)
Anoxic Depth (m)
Above Seds
Stratified
?
Depth to thermocline
(m)
1/18/2001
7.5
7.5
0
N
N
1/19/2001
7.5
7.5
0
N
N
2/27/2001
7.5
7.5
0
N
N
3/30/2001
7.5
7.5
0
Y
5.5
4/25/2001
7.5
7.5
0
N
N
5/9/2001
8
7.5
0.5
Y
6.7
5/24/2001
7
7
0
N
N
6/8/2001
7.5
7.5
0
Y
3.4
6/13/2001
7.5
7.5
0
Y
4.6
6/19/2001
7.5
7.5
0
Y
5.5
6/25/2001
7.5
7.5
0
Y
6.1
7/3/2001
7.5
7.5
0
N
N
7/10/2001
7
7
0
Y
1.8
7/19/2001
7.5
7.5
0
N
N
7/24/2001
7.5
7.5
0
N
N
8/8/2001
7.5
6.5
1
N
N
8/15/2001
7
7
0
N
N
8/22/2001
7
7
0
N
N
8/29/2001
7
7
0
N
N
9/5/2001
7
7
0
N
N
9/19/2001
7
7
0
N
N
10/22/2001
7
7
0
N
N
11/27/2001
7
7
0
N
N
12/11/2001
7.5
7.5
0
N
N
6/8/2003
6.5
6.5
0
Y
2.1
6/17/2003
7
7
0
Y
4.0
6/23/2003
7
7
0
Y
5.2
7/1/2003
6.5
6.5
0
Y
4.6
7/8/2003
6.5
6.5
0
N
N
7/15/2003
6.5
6.5
0
N
N
7/24/2003
7.5
7
0.5
N
N
7/30/2003
7
7
0
Y
5.5
8/6/2003
6.5
6.5
0
N
N
8/13/2003
7
7
0
Y
5.9
8/20/2003
7
7
0
Y
5.8
8/27/2003
6.5
6.5
0
Y
5.0
9/3/2003
7
7
0
Y
5.5
9/10/2003
6.5
6.5
0
Y
5.5
9/18/2003
6
6
0
Y
5.5

Date
Bottom Depth
(m)
Depth <1.0 mg/L
O2 (m)
Anoxic Depth (m)
Above Seds
Stratified
?
Depth to thermocline
(m)
9/26/2003
6.5
6.5
0
Y
6.0
10/2/2003
6.5
6.5
0
Y
5.5
5/5/2004
7
7
0
Y
4.0
5/12/2004
7.5
7.5
0
Y
6.7
5/19/2004
7.5
7.5
0
Y
4.6
5/26/2004
8
7.5
0.5
Y
4.3
6/2/2004
7
7
0
N
N
6/9/2004
7.5
7.5
0
Y
4
6/16/2004
7.5
7.5
0
Y
5
6/23/2004
8
8
0
Y
6.3
6/30/2004
7
7
0
N
N
7/7/2004
7.5
7.5
0
N
N
7/14/2004
7
4
3
N
N
7/21/2004
7
7
0
Y
5.4
7/28/2004
NO DATA
NO DATA
NO DATA
NO DATA
NO DATA
8/4/2004
6
4
2
N
N
8/11/2004
7.5
7.5
0
Y
6.2
8/18/2004
7
7
0
Y
5
8/25/2004
8
7.5
0.5
Y
6.4
9/1/2004
7.5
7.5
0
Y
5.8
9/10/2004
7.5
7
0.5
Y
6.1
9/15/2004
9
7.5
1.5
Y
6.0
9/22/2004
7
7
0
Y
6.1
6/3/2005
7.5
7.5
0
Y
4.9
6/8/2005
7.5
6.5
1
Y
4.0
6/16/2005
7.5
7.5
0
N
N
6/21/2005
7.5
7
0.5
N
N
6/28/2005
7
6.5
0.5
N
N
7/7/2005
6.5
6
0.5
Y
6.0
7/13/2005
7.5
7.5
0
Y
6.7
7/20/2005
7
7
0
N
N
7/27/2005
7
7
0
N
N
8/2/2005
7
7
0
N
N
8/9/2005
7
7
0
N
N
8/18/2005
6.5
6.5
0
Y
6.0
8/23/2005
6.5
6.5
0
Y
6.0
8/31/2005
6.5
6.5
0
N
N
9/8/2005
6.5
6.5
0
N
N
9/14/2005
7
7
0
Y
5.49
9/21/2005
7
7
0
Y
5.03
Electronic Filing - Received, Clerk's Office, July 10, 2009

Date
Bottom Depth
(m)
Depth <1.0 mg/L
O2 (m)
Anoxic Depth (m)
Above Seds
Stratified
?
Depth to thermocline
(m)
9/29/2005
6
6
0
Y
5
5/4/2006
7
7
0
Y
6.7
5/11/2006
7.5
6.5
1
Y
5.0
5/18/2006
6.5
6.5
0
N
5
5/25/2006
6.5
6.5
0
Y
5
6/1/2006
7
6.5
0.5
Y
4.3
6/9/2006
7
7
0
Y
N
6/15/2006
6.5
6.5
0
Y
5
6/22/2006
6.5
6.5
0
Y
N
6/29/2006
6.5
6.5
0
N
6.0
7/6/2006
7
7
0
Y
1.5
7/13/2006
6.5
6.5
0
N
N
7/19/2006
6.5
6.5
0
N
N
7/27/2006
6.5
6.5
0
N
N
8/3/2006
6
5.5
0.5
N
N
8/10/2006
6
6
0
N
N
8/18/2006
6
6
0
N
N
8/24/2006
6
6
0
N
5.5
8/30/2006
6
6
0
N
5.5
9/6/2006
6
6
0
Y
N
9/12/2006
6
6
0
Y
4.6
9/19/2006
4
4
0
N
N
9/28/2006
5
5
0
N
N
Data Source: SIUC 2006 and 2007

Table A-12. Water Quality Profile Data by Year from SIUC Reports for Segment 4
Date
Bottom
Depth (m)
Depth <1.0 mg/L
O2 (m)
Anoxic Depth (m)
Stratified
?
Depth to thermocline
(m)
1/18/2001
7.5
7.5
0
N
N
1/19/2001
7.5
7.5
0
Y
4.0
2/27/2001
8
8
0
Y
4.0
3/30/2001
7.5
7.5
0
Y
5
4/25/2001
7.5
7.5
0
N
N
5/9/2001
8
8
0
Y
5.2
5/24/2001
8
8
0
N
N
6/8/2001
7.5
7.5
0
Y
2.0
6/13/2001
7.5
7.5
0
Y
4.6
6/19/2001
7.5
7
0.5
Y
4.6
6/25/2001
7.5
7.5
0
Y
7.0
7/3/2001
7.5
7.5
0
N
N
7/10/2001
7.5
7.5
0
N
N
7/19/2001
7
7
0
N
N
7/24/2001
7.5
7.5
0
Y
5
8/8/2001
7.5
7.5
0
N
N
8/15/2001
7.5
7.5
0
N
N
8/22/2001
7.5
7.5
0
N
N
8/29/2001
7
7
0
N
N
9/5/2001
7.5
7.5
0
N
N
9/19/2001
7
7
0
N
N
10/22/2001
7.5
7.5
0
N
N
11/27/2001
7
7
0
N
N
12/11/2001
7.5
7.5
0
N
N
6/8/2003
6
6
0
Y
3.0
6/17/2003
7
7
0
Y
5.0
6/23/2003
6.5
6
0.5
Y
4.9
7/1/2003
6.5
6.5
0
N
N
7/8/2003
6.5
6.5
0
N
N
7/15/2003
6
6
0
N
N
7/24/2003
7
6.5
0.5
N
N
7/30/2003
7
7
0
N
N
8/6/2003
7
6.5
0.5
N
N
8/13/2003
6.5
6.5
0
N
N
8/20/2003
7
7
0
N
N
8/27/2003
6.5
6.5
0
N
N
9/3/2003
6.5
6.5
0
N
N
9/10/2003
6.5
6.5
0
N
N
9/18/2003
6
6
0
N
N
Electronic Filing - Received, Clerk's Office, July 10, 2009

Date
Bottom
Depth (m)
Depth <1.0 mg/L
O2 (m)
Anoxic Depth (m)
Stratified
?
Depth to thermocline
(m)
9/26/2003
6
6
0
N
N
10/2/2003
6.5
6.5
0
N
N
5/5/2004
7
7
0
N
N
5/12/2004
7.5
7.5
0
Y
6
5/19/2004
7
7
0
Y
6
5/26/2004
4.5
4.5
0
Y
4
6/2/2004
8.5
8
0.5
Y
6
6/9/2004
7.5
6.5
1
Y
4.3
6/16/2004
7.5
6.5
1
Y
6
6/23/2004
8
8
0
N
N
6/30/2004
7.5
6
1.5
N
N
7/7/2004
6.5
6.5
0
N
N
7/14/2004
7
6.5
0.5
N
N
7/21/2004
6.5
6.5
0
N
N
7/28/2004
NO DATA
NO DATA
NO DATA
NO
DATA
NO DATA
8/4/2004
7
5.5
1.5
N
N
8/11/2004
7
7
0
N
N
8/18/2004
7.5
6.5
1
N
N
8/25/2004
7
7
0
N
N
9/1/2004
7
7
0
N
N
9/10/2004
8
7.5
0.5
N
N
9/15/2004
8.5
8
0.5
N
N
9/22/2004
7
7
0
N
N
6/3/2005
7.5
7
0.5
Y
5.6
6/8/2005
8
7
1
Y
4.0
6/16/2005
6
6
0
N
N
6/21/2005
6.5
6.5
0
N
N
6/28/2005
6.5
6
0.5
N
N
7/7/2005
6.5
6.5
0
N
N
7/13/2005
8
8
0
N
N
7/20/2005
6.5
6
0.5
N
N
7/27/2005
7
7
0
N
N
8/2/2005
7
6
1
N
N
8/9/2005
6.5
6.5
0
N
N
8/18/2005
7
7
0
N
N
8/23/2005
6.5
6.5
0
N
N
8/31/2005
6
6
0
N
N
9/8/2005
6
6
0
N
N
9/14/2005
7
7
0
N
N
Electronic Filing - Received, Clerk's Office, July 10, 2009

Date
Bottom
Depth (m)
Depth <1.0 mg/L
O2 (m)
Anoxic Depth (m)
Stratified
?
Depth to thermocline
(m)
9/21/2005
7
7
0
N
N
9/29/2005
6.5
6.5
0
N
5.5
5/4/2006
6.5
6.5
0
Y
5.5
5/11/2006
6.5
6.5
0
Y
4.6
5/18/2006
6.5
6.5
0
Y
4.6
5/25/2006
6
6
0
Y
4.0
6/1/2006
6.5
6.5
0
Y
6.1
6/9/2006
6.5
6.5
0
Y
N
6/15/2006
6.5
6.5
0
Y
N
6/22/2006
6
6
0
Y
N
6/29/2006
6.5
6.5
0
N
N
7/6/2006
6.5
6.5
0
N
N
7/13/2006
6.5
6.5
0
N
N
7/19/2006
6.5
6.5
0
N
N
7/27/2006
6
6
0
N
N
8/3/2006
6
6
0
N
N
8/10/2006
6
6
0
N
N
8/18/2006
6
6
0
N
N
8/24/2006
6
6
0
N
N
8/30/2006
6
6
0
N
N
9/6/2006
6
6
0
Y
N
9/12/2006
6
6
0
Y
N
9/19/2006
5
5
0
N
N
9/28/2006
5
5
0
N
N
Data Source: SIUC 2006 and 2007
Electronic Filing - Received, Clerk's Office, July 10, 2009

Table A-13. Summary of Average Depth to Anoxia for Segment 1 by Year
Segment 1
- Average depth to Anoxic conditions (<1mg/L O2) in Meters
JAN
FEB
MAR
APR
MAY JUN JUL
AUG
SEP
OCT
NOV
DEC
2001
N
N
N
N
N
1.00
6.13
6.67
5.75
N
N
N
2002
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2003
NA
NA
NA
NA
NA
6.50
5.20
5.63
6.83
7.00
NA
NA
2004
NA
NA
NA
NA
8.25
5.40
6.50
5.83
5.67
NA
NA
NA
2005
NA
NA
NA
NA
NA
6.30
5.50
5.80
7.25
NA
NA
NA
2006
NA
NA
NA
NA
8.13
5.63
5.25
4.70
6.13
NA
NA
NA
Monthly
Average
NA
NA
NA
NA
8.19
4.97
5.72
5.73
6.33
7.00
NA
NA
Note:
N = no anoxic conditions identified
NA = No data available
Table A-14. Summary of Average Depth to Anoxia for Segment 2 by Year
Segment 2
- Average depth to Anoxic conditions (<1mg/L O2) in Meters
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
2001
N
N
N
N
9.50
11.50
8.38
8.88
*NA
N
N
N
2002
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2003
NA
NA
NA
NA
NA
8.17
7.40
6.75
8.63
10.50
NA
NA
2004
NA
NA
NA
NA
8.83
7.30
7.63
7.75
7.50
NA
NA
NA
2005
NA
NA
NA
NA
NA
7.20
7.38
7.75
8.50
NA
NA
NA
2006
NA
NA
NA
NA
8.88
7.40
6.00
7.30
7.67
NA
NA
NA
Monthly
Average
NA
NA
NA
NA
9.07
8.31
7.36
7.69
8.07
10.50
NA
NA
Note:
N = no anoxic conditions identified
NA = No data available
Table A-15. Summary of Average Depth to Anoxia for Segment 3 by Year
Segment 3
- Average depth to Anoxic conditions (<1mg/L O2) in Meters
JAN
FEB
MAR
APR
MAY JUN JUL
AUG
SEP
OCT
NOV
DEC
2001
N
N
N
N
7.50
N
N
6.50
N
N
N
N
2002
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2003
NA
NA
NA
NA
NA
N
7.00
N
N
N
NA
NA
2004
NA
NA
NA
NA
7.50
N
4.00
5.75
7.25
NA
NA
NA
2005
NA
NA
NA
NA
NA
6.67
6.00
N
N
NA
NA
NA
2006
NA
NA
NA
NA
6.50
6.50
N
5.50
N
NA
NA
NA
Monthly
Average
NA
NA
NA
NA
7.17
6.58
5.67
5.92
7.25
NA
NA
NA
Note:
N = no anoxic conditions identified
NA = No data available
Electronic Filing - Received, Clerk's Office, July 10, 2009

Table A-16. Summary of Average Depth to Anoxia for Segment 4 by Year
Segment 4
- Average depth to Anoxic conditions (<1mg/L O2) in Meters
JAN
FEB
MAR
APR
MAY JUN JUL
AUG
SEP
OCT
NOV
DEC
2001
N
N
N
N
N
1.00
6.13
6.67
5.75
N
N
N
2002
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2003
NA
NA
NA
NA
NA
6.50
5.20
5.63
6.83
7.00
NA
NA
2004
NA
NA
NA
NA
8.25
5.40
6.50
5.83
5.67
NA
NA
NA
2005
NA
NA
NA
NA
NA
6.30
5.50
5.80
7.25
NA
NA
NA
2006
NA
NA
NA
NA
8.13
5.63
5.25
4.70
6.13
NA
NA
NA
Monthly
Average
NA
NA
NA
NA
8.19
4.97
5.72
5.73
6.33
7.00
NA
NA
Note:
N = no anoxic conditions identified
NA = No data available
Table A-17. Summary of Estimated Number of Anoxic Days for Segment 1 by Year
Segment 1
– Estimated Number of Anoxic Days
JAN
FEB
MAR
APR
MAY JUN JUL
AUG
SEP
OCT
NOV
DEC
2001
N
N
N
N
0
5
30
30
30
0
N
N
2002
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2003
NA
NA
NA
NA
NA
22
30
30
30
2
NA
NA
2004
NA
NA
NA
NA
25
30
30
30
22
NA
NA
NA
2005
NA
NA
NA
NA
NA
27
30
30
30
NA
NA
NA
2006
NA
NA
NA
NA
30
30
30
30
19
NA
NA
NA
Monthly
Average
NA
NA
NA
NA
18
23
30
30
26
1
NA
NA
Note:
N = no anoxic conditions identified
NA = No data available
Table A-18. Summary of Estimated Number of Anoxic Days for Segment 2 by Year
Segment 2
– Estimated Number of Anoxic Days
JAN
FEB
MAR
APR
MAY JUN JUL
AUG
SEP
OCT
NOV
DEC
2001
N
N
N
N
6
13
30
30
NA
0
N
N
2002
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2003
NA
NA
NA
NA
NA
26
30
30
26
2
NA
NA
2004
NA
NA
NA
NA
18
30
30
30
24
NA
NA
NA
2005
NA
NA
NA
NA
NA
27
30
30
15
NA
NA
NA
2006
NA
NA
NA
NA
26
30
30
30
19
NA
NA
NA
Monthly
Average
NA
NA
NA
NA
17
25
30
30
21
1
NA
NA
Note:
N = no anoxic conditions identified
NA = No data available

Table A-19. Summary of Estimated Number of Anoxic Days for Segment 3 by Year
Segment 3
– Estimated Number of Anoxic Days
JAN
FEB
MAR
APR
MAY JUN JUL
AUG
SEP
OCT
NOV
DEC
2001
N
N
N
N
15
0
0
7
0
0
N
N
2002
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2003
NA
NA
NA
NA
NA
0
9
0
0
0
NA
NA
2004
NA
NA
NA
NA
6
0
7
8
5
NA
NA
NA
2005
NA
NA
NA
NA
NA
15
7
0
0
NA
NA
NA
2006
NA
NA
NA
NA
7
6
0
7
0
NA
NA
NA
Monthly
Average
NA
NA
NA
NA
9
4
5
4
1
0
NA
NA
Note:
N = no anoxic conditions identified
NA = No data available
Table A-20. Summary of Estimated Number of Anoxic Days for Segment 4 by Year
Segment 4
– Estimated Number of Anoxic Days
JAN
FEB
MAR
APR
MAY JUN JUL
AUG
SEP
OCT
NOV
DEC
2001
N
N
N
N
0
6
0
0
0
0
N
N
2002
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2003
NA
NA
NA
NA
NA
7
6
6
0
0
NA
NA
2004
NA
NA
NA
NA
0
16
6
6
7
NA
NA
NA
2005
NA
NA
NA
NA
NA
10
6
6
0
NA
NA
NA
2006
NA
NA
NA
NA
0
0
0
0
0
NA
NA
NA
Monthly
Average
NA
NA
NA
NA
0
8
4
4
1
0
NA
NA
Note:
N = no anoxic conditions identified
NA = No data available

GIS Calculation of Anoxic Substrate Area
Average monthly depths to anoxia (Tables A-8 through A-11) were used to set as the
area/volume planes in GIS. Because the lake was analyzed within four segments, separate
outputs were generated for each segment. The raw GIS output was in the form of a text (.txt) file
with square and cubic feet as the units. Once conversion of units was performed, data was
provided as a summary of the anoxic substrate surface area by month.
Table A-21. Summary of Lake Areas and Volumes Beneath the Water Surface
Water
Surface
Substrate
Surface
Volume
Depth
Mean
Depth
Max
Segment
km
2
km
2
m
3
m
m
1
0.79
0.80
5,086,066
5.97
16.76
2
1.47
1.48
12,110,289
7.72
16.76
3
0.49
0.49
1,786,325
2.91
10.64
4
1.09
1.09
3,968,561
2.55
9.14
Total
3.84
3.87
22,951,242
5.00
16.76
Table A-22. Summary of GIS Output of Anoxic Substrate Surface Area Under Existing
Conditions By Month (square meters)
MAY
JUN
JUL
AUG
SEP
OCT
Segment 1
252996 418480 382107 381670 297466 280984
Segment 2
726558 771795 834444 809588 786065 522929
Segment 3
63855
68450
96183
89143
63194
0
Segment 4
0
133142 139594 142908 113172
0
Table A-23. GIS Output of Incremental Increase in Substrate Anoxia During May and
October (square meters)
MAY
MAY Proposed OCTOBER OCTOBER Proposed
Segment 1
252996.28
418480
280984
288935
Segment 2
726558.29
771795
522929
626321
CH2\7465677.1

 
EXHIBIT C
Electronic Filing - Received, Clerk's Office, July 10, 2009

 
MEMORANDUM OF UNDERSTANDING
This memorandum of understanding (“
Memorandum
”) is made as of the ___ day of ________,
2009 by and between Ameren Energy Generating Company, an Illinois corporation (“
Ameren
”),
and the State of Illinois, acting by and through the Department of Natural Resources (“
DNR
”).
WHEREAS, Ameren is the fee simple owner of certain real property located in
Montgomery County, Illinois depicted on Exhibit A attached hereto and made a part hereof (the
Property
”);
WHEREAS, Ameren operates the Coffeen Power Generating Station (the “
Coffeen
Station
”) on the Property, and the reservoir located thereon known as Coffeen Lake (the
Lake
”) was constructed for the purpose of providing cooling water for the Coffeen Station and
for other purposes relating to the operation of the Coffeen Station;
WHEREAS, Central Illinois Public Service Company, an Illinois corporation (“
CIPS
”),
as the prior Ameren of the Property, and DNR (formerly known as the Department of
Conservation) entered into that certain Lease Agreement dated July 2, 1986 (commonly referred
to as Lease Agreement No. 416A), as amended by that certain Amendment to Lease dated 1988,
that certain Amendment to Lease dated November 11, 1989, that certain Amendment to Lease
dated June 11, 1991, that certain Amendment #4 dated October 1, 1995, that certain Amendment
#5 dated August 20, 1996, and that certain Amendment #6 dated June 30, 1997 (collectively, the
Lease Agreement
”) relating to DNR’s right to use certain portions of the Property for the
purposes of conservation and public recreation;
WHEREAS, Ameren is the assignee of CIPS’ interest in the Lease Agreement;
WHEREAS, Owner’s primary obligation as an electric and power generating company is
to provide adequate and reliable service to its customers, and Ameren and DNR recognize that
use of the Lake and the adjoining recreational areas by DNR and the public must be restricted in
order that such use shall not conflict or interfere with the present and future operation and use of
the Coffeen Station; and
WHEREAS, Ameren is seeking regulatory relief from the Illinois Pollution Control
Board for certain thermal discharge standards applicable to its cooling water discharge to the
Lake in the months of May and October; and
WHEREAS, the parties desire to promote the continued use of the Lake for recreational
purposes and to identify fish species tolerant of thermal conditions within cooling lakes such as
the Lake; and

NOW, THEREFORE, in consideration of the foregoing premises and the mutual
covenants and agreements set forth in this Memorandum, the parties agree as follows:
1.
Fish Population and Behavior Status Monitoring Studies.
Ameren shall monitor the
status of key fish populations in the Lake and document the long-term effects, if any, of the
revised thermal standards for the months of May and October on these populations. This study
will also investigate the ability of fish to avoid exposure to stress by seeking preferred
temperatures within the Lake’s environment and will locate available thermal refuges during
peak temperatures. IDNR annually monitors six fish species in the Lake and has created an
extensive long-term database. The proposed study will be designed to complement and utilize
IDNR data to the extent possible. A more detailed study design will be completed after review
of IDNR sampling methods and data, followed by a meeting with IDNR personnel to reach
agreement on sampling objectives and methodology. The study may be performed as a joint
study between IDNR and Ameren field contractors. The study plan design will be completed
within one year of execution of this Agreement MOU. Studies will be conducted under strict
quality assurance protocols including Standard Operating Procedures (SOP) to ensure reliable
data collection.
2.
Fish Stocking Pilot Study
. In order to better evaluate suitable fish species for cooling
lakes in Illinois, Ameren will implement, in conjunction with IDNR, a three-year fish stocking
pilot study at the Lake. The stocking study will assess the viability of adding a new fish to the
lake. The fish population study will assess thermal impacts on the existing fish population and
the new species added as well. These studies includes Ameren’s agreement to dedicate up to
$20,000.00 per year for the three-year pilot towards stocking the Lake with suitable species, such
as the blue catfish, to help IDNR better assess the long term nature of maintaining a viable
fishing resource.
3.
The foregoing studies shall include at least the following elements:
a. Collect annual data on the relative abundance, growth, condition, and size structure of
key fish populations such as largemouth bass, white crappie, bluegill, channel catfish, and
species stocked as a result of this agreement, e.g., blue catfish.
b. Compare results to data from previous years to detect long-term trends possibly related to
a changing thermal regime.
c. In vertical and horizontal planes, determine whether fish avoid certain areas and
congregate in others during near-peak water temperatures.
d. Record vertical profiles of water temperatures and dissolved oxygen in areas where fish
are aggregated and compare to other locations in the Lake.
e. In the event of excessive fish mortality, identify key species that are tolerant of thermal
conditions within the Lake.
4.
The studies may incorporate the following methodologies
:
a. Fish Population Study
1.
Study duration—three to five years
2.
Sampling frequency—one survey per year during September or October
Electronic Filing - Received, Clerk's Office, July 10, 2009

3. Sampling stations—stratified design to include all lake zones with stations to be
determined after consultation with IDNR
4. Sampling gear—boat-mounted electrofisher
5.
Sample processing—species identification, length and weight measurements, scale
samples for possible age analysis
b. Fish Behavior
1.
Study duration—one year
2.
Sampling frequency—one survey in mid- or late summer
3.
Sampling stations—zig-zag transects across the lake along the axis of the lake, to
include major embayments (e.g., cemetery bay) and the northern arm above the intake
and railroad bridge
4. Sampling gear—scientific-grade hydroacoustics employing side-scan and down-
looking transducers; variable-mesh gill nets and/or boat-mounted electrofisher for
species/size composition; hand-held CTD (conductivity, temperature, and depth) and
DO meters
5. Sampling procedures—
Run simultaneous, synoptic thermal/DO 3-dimensional
mapping to characterize available habitat at the time of hydroacoustic sampling; run
additional profiles in areas of fish aggregations, as needed
5
.
Deliverables.
Ameren shall provide an
a
nnual summary data report and maintain an
electronic database.
6.
Corrective Action – Fish Mortality.
During summer months, the Lake will be
monitored. In the event of an apparent fish kill, Ameren will investigate whether the fish kill
resulted from the increase in temperature and, specifically, Ameren’s electric generation
activities, resulted in the fish kill. If the fish kill resulted from the increase in thermal limits then
Ameren shall replenish or replace the impacted resource pursuant to the terms and conditions of
a Fish Stocking Plan to be developed in consultation with IDNR.
7.
Ameren recognizes and agrees that IDNR participation in this study effort does not
prejudge or determine responsibility for fish kills in the Lake; IDNR will still be responsible for
investigation and assessment of such kills and for determining the agents and entities responsible
for fish kills. Further, IDNR participation does not commit IDNR to any position on planned or
future regulatory proceedings that might effect operations of the Ameren power plant or the
Lake.
8.
With respect to the Petition to Modify Thermal Standard in Ameren Energy Generating
Company v. IEPA, PCB No. 2009-0038, currently pending before the Board, IDNR has
reviewed the technical support materials and consulted with Ameren’s fish experts, and has
agreed to the above described studies and actions to document and mitigate the effects, if any, of
the revised thermal standards on the lake fishery. Notwithstanding the foregoing, nothing in this
Agreement shall be construed to preclude or inhibit IDNR in any future legal proceeding.

9.
Designated Contacts.
Notices, deliverables and other written communications made
under this Memorandum shall be sent to the persons listed herein, unless a Party designates in
writing another person as its contact:
For AMEREN
:
AMEREN ENERGY GENERATING COMPANY
Coffeen Power Station
134 CIPS Lane
Coffeen, IL 62739
ATTN: Plant Manager
For DNR:
Chief of Fisheries, Illinois Department of Natural Resources
One Natural Resources Way
Springfield, IL 62702-1271
IN WITNESS WHEREOF, the parties have executed this Agreement as of the date first above
written.
OWNER:
Attest:
Ameren Energy Generating Company
, an
Illinois corporation
Name:
Title:
By:
Name:
Its:
DNR:
Attest:
Department of Natural Resources, State of
Illinois
Name:
Title:
By:
Name:
Its:
Electronic Filing - Received, Clerk's Office, July 10, 2009

 
AFFIDA VIT OF ANN 8. SHORTELLE. PH.D.
I, ANN 8. SHORT ELLE, PH .D., ha vin
g fi rs
t been duly sworn,
slate
a
s fo llows:
1.
I am a Chief Scientist with MACTEC Engineerin g and Consu lting, I
nc.
("MACT EC'), I have 24 years of professional experience in lim n
o l
ogy and lake and
r
eservoi r manageme nt, includi ng s
urFace wal
er quality monitoring and analysis.
2.
In May 2009. Ameren Energy Gencnll ing Company ("'Amcren") engaged
MACTEC lO prepare a r
epo rt on the conditi
on
s of Coffee n L
ake wi th regar
d to phosphorus
an
d mercury. M ACTEC eva luated the conditi ons in Coffeen L
ake and th e potenti al fo r
impacts on phosphorus and mercury cycling
frolll
Amcrcn'
s proposed Illodifici.lli on to the
current si
te-specific thermal st
anda
rds. The r
eport is en titled "Evalu atio n of Ef
fects of
Revised Thermal Stand ards on Phosphorus and Mer
cury Cycling in Cof
feen Lake:'
3.
I have read Secti
on C of the preceding Amcr
en's Response to Inf
ormation
Req uest
ed at
Pu blic Hearing.
4.
The statement s of facts contained therei n and the calculations cont ai
ned in
Exh ib i
t H attached to Amer
en '
s Respon se to informat i
on Requested at Pu blic H
earing arc
InlC
and co rrecl l
O the best of my knowledge and belief.
FURTHER, A FFI ANT SA YETH NOT.
An n B. Shorlelle. Ph .D.
Subscribed and sworn t
o befor
e me thi s J
D..f;b.
day 0[-0
3,...,"'
""'-'
1
_'11-
______ . 2009.
C 1I217 166101 I
7
NOTARY PUBLIC
NOTARY PUBUC.STAfE OF FI.ORlDA
~
Karen
L.
G
rubel
Commission #
DD528637
Expires: MAR. 29, 2010
Bonded Thru Atlantic B
onding Co., Inc.

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