2

INTRODUCTION

Dissolved oxygen is essential to aquatic organisms for aerobic respiration. DO occurs

between water molecules as microscopic bubbles of oxygen that fish “breathe” through their

gills.

1

Human activities, including biochemical oxygen demand or “BOD” and nutrient

discharge, and natural processes affect DO levels in Illinois waters. The DO general use water

quality standard is critical to many other regulatory programs, including “impairment”

assessments and Total Maximum Daily Load or “TMDL” under Section 303(d) of the federal

Clean Water Act (33 U.S.C. § 1313(d)). By its authority under the Environmental Protection Act

(Act) (415 ILCS 5 (2006)) and to reflect the current science, the Board is updating the existing

DO water quality standard, which was adopted in 1972.

The Board’s responsibility in this rulemaking arises from the Act, which charges the

Board to “determine, define, and implement the environmental control standards applicable in

the state of Illinois.” 415 ILCS 5/5(b) (2006). Under Section 13 of the Act, the Board is granted

specific rulemaking authority to establish water quality standards.

See

415 ILCS 5/13 (2006).

Section 13(a)(1) of the Act specifically addresses dissolved oxygen:

(a)

The Board, pursuant to procedures prescribed in Title VII of this Act, may

adopt regulations to promote the purposes and provisions of this Title.

Without limiting the generality of this authority, such regulations may

among other things prescribe:

(1)

Water quality standards specifying among other things, the

maximum short-term and long-term concentrations of various

contaminants in the waters, the

minimum permissible

concentrations of dissolved oxygen

and other desirable matter in

the waters, and the temperature of such waters. 415 ILCS

5/13(a)(1) (2006) (emphasis added).

As noted, the Board adopted Illinois’ current general use water quality standard for

dissolved oxygen in 1972, at which time the Board found it “essential to an adequate fish

population.” Effluent Criteria, Water Quality Standards, Water Quality Standards Revisions for

Intrastate Waters, R70-8, R71-14, R71-20, slip op. at 3 (Jan. 6, 1972). The standard is presently

set forth at 35 Ill. Adm. Code 302.206 and reads as follows:

1

Sheila F. Murphy, hydrologist/geologist, U.S. Geological Survey

http://bcn.boulder.co.us/basin/data/BACT/info/DO.html

(page last updated April 23, 2007).

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Section 302.206

Dissolved Oxygen

Dissolved oxygen (STORET number 00300) shall not be less than 6.0 mg/l during

at least 16 hours of any 24 hour period, nor less than 5.0 mg/l at any time. 35 Ill.

Adm. Code 302.206.

Accordingly, the current standard permits dissolved oxygen to be less than 6.0 milligrams

per liter (mg/L) no more than 8 hours in any 24-hour period, but at no time is dissolved oxygen

allowed to fall below 5.0 mg/L. Section 302.206 is set forth in Part 302’s Subpart B (“General

Use Water Quality Standards”), which “contains general use water quality standards which must

be met in waters of the State for which there is no specific designation (35 Ill. Adm. Code

303.201).” 35 Ill. Adm. Code 302.101(b);

see also

35 Ill. Adm Code 302.201. Generally, “all

waters of the State must meet the general use standards of Subpart B of Part 302,” except as

otherwise specifically provided in the Board’s regulations, such as for waters designated as

secondary contact and indigenous aquatic life waters.

See

35 Ill. Adm. Code 303.201, 303.204.

2

At first notice, the Board recognized that the State’s current DO standard is outdated and

needs to be amended consistent with USEPA’s 1986 National Criteria Document or “NCD,” as

adapted to Illinois waters. In the NCD, USEPA recommends separate DO criteria for coldwater

and warmwater biota. While the coldwater criteria address the protection of salmonids, the

warmwater criteria are meant to protect nonsalmonids, which include many coldwater and

“coolwater” fish, plus all warmwater fish. Exh. 2 (NCD) at 2. The warmwater criteria protect

the early life stages of warmwater fish as sensitive as channel catfish and other life stages of fish

as sensitive as largemouth bass.

Id.

In addition, the NCD provides for the establishment of

seasonal criteria based on the life stages of aquatic organisms present as long as data is available

to accurately determine the presence or absence of the more sensitive stages.

Id

. at 4. The early

life stages include embryonic and larval stages and all juvenile forms to 30-days after hatching.

Id.

at 34.

The NCD recommends a daily minimum to ensure that no acute mortality of sensitive

species occurs because of low DO concentrations. Exh. 2 (NCD) at 36. For early life stages, the

NCD recommends that the averaging period should not exceed 7 days to adequately protect the

most sensitive life stages of aquatic organisms. A 30-day average is recommended for other life

stages. The NCD also recommends the use of a 7-day mean minimum value for other life stages

to prevent significant episodes of continuous or regularly recurring exposures to DO

concentrations at or near the lethal threshold.

Id.

2

On October 26, 2007, IEPA filed a rulemaking proposal, accepted for hearing by the Board on

November 1, 2007, seeking to amend, among other things, the secondary contact and indigenous

aquatic life DO water quality standards at 35 Ill. Adm. Code 302.405. Public hearings in that

rulemaking are presently scheduled for January 28, 2008, in Chicago and March 10, 2008, in

Joliet.

See

Water Quality Standards and Effluent Limitations for the Chicago Area Waterway

System and the Lower Des Plaines River: Proposed Amendments to 35 Ill. Adm. Code 301, 302,

303 and 304, R08-9.

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4

The current Illinois standard for DO was adopted 14 years before the NCD was issued by

USEPA. Exh. 23 at 7. Not surprisingly then, the NCD’s criteria for DO address several

elements not addressed by Illinois’ current standard: differences in sensitivity to low DO among

types of fish or macroinvertebrates; differences in DO sensitivity depending on the life stages of

fish; and practical considerations to account for occasional natural occurrences of low DO.

Id

. at

5.

Given the wide array of aquatic life and conditions across Illinois, the Board found at first

notice that the current Illinois DO standard is not sufficiently sophisticated. PC 96 at 1, citing

Exh. 23 at 1; PC 101 at 1; PC 102 at 2, 5; PC 103 at 1, 16; Exh. 14 at 1; Exh. 32 at 1-3;

Statement at 4-5. As the Board noted in its first-notice opinion, almost all of the participants

who articulated a position in this rulemaking favored amending the current dissolved oxygen

water quality standard for general use waters. There was also much consensus in the record on

how the current standard should be amended, such as by adopting DO standards that change

seasonally based on the life stages of fish.

The two primary areas of disagreement among the rulemaking participants prior to first

notice were (1) whether to include the month of July in the early life stages timeframe and (2)

whether certain stretches of Illinois streams should have more protective DO standards than the

rest of the general use waters based on the presence of allegedly DO-sensitive aquatic organisms.

At first notice, the Board proposed to include July in the early life stages period and to include

designated stream segments for enhanced DO protection. The Board continued to do so at

second notice. As provided in its final public comment, IAWA ended up supporting the

inclusion of July in the early life stage period but still opposed designating stream segments for

enhanced DO protection.

See

PC 113.

At second notice, the Board replaced “calendar days” with “consecutive 24-hour periods”

for measuring DO-standard attainment, as recommended by IEPA in its final public comment.

Otherwise, the Board’s second-notice proposal remained substantively unchanged from first

notice.

No substantive changes are being made today to the second-notice rule language. The

final amendments should significantly improve the current DO standard. Unlike the current

standard, the amendments take into account the varied DO requirements of aquatic communities

and the diverse range of natural aquatic conditions present across Illinois. The amendments will

also allow both public and private resources to be focused on those waters most impacted by low

DO.

PROCEDURAL HISTORY

On April 19, 2004, IAWA filed its rulemaking proposal to amend Illinois’ general use

water quality standard for dissolved oxygen.

3

The Board issued an order on May 6, 2004,

3

The Board cites IAWA’s “statement of reasons” included in its rulemaking proposal as

“Statement at _.”

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5

accepting the IAWA proposal for hearing. DNR and IEPA filed their joint proposed revisions to

the DO standard on April 4, 2006.

As Toby Frevert, Manager of the Division of Water Pollution Control for IEPA, testified:

Illinois’ general use dissolved oxygen standard carries more significance than

many of our other water quality standards and there is a wide diversity of opinion,

perspective and attitude among the various constituencies participating in the

proceeding. Exh. 14 at 2.

Given the significance of the DO general use water quality standard and the varied views of the

rulemaking participants on how it should be revised, the Board accommodated the wishes of the

participants and allowed this rulemaking to proceed at a pace that would allow for continued

stakeholder discussions. To that end, the hearing officer scheduled hearings only when the

participants stated that they were ready to proceed and only after the hearing officer, at the

participants’ request, conducted six status conferences and received eight status reports over the

course of nearly two years.

The Board held five public hearings over six days in this rulemaking: (1) June 29, 2004,

in Chicago; (2) August 12, 2004, in Springfield; (3) August 25, 2005, in Chicago; (4) April 25,

2006, in Springfield; and (5) November 2-3, 2006, in Springfield. The following 20 persons

testified at the hearings indicated:

•

Dennis Streicher, Director of Water and Wastewater for the City of Elmhurst (first,

second, and third hearings, and fifth hearing);

•

John Callahan, Executive Director of the Bloomington and Normal Water Reclamation

District of McLean County (first and second hearings);

•

Dr. James Garvey, Associate Professor of Zoology and Associate Director of the

Fisheries and Illinois Aquaculture Center at Southern Illinois University (first, second,

and third hearings, and fifth hearing);

•

Roy Harsch, Drinker Biddle Gardner Carton, attorney for IAWA (first, second, and third

hearings, and fifth hearing);

•

Toby Frevert, Manager of the Division of Water Pollution Control for IEPA (all five

hearings);

•

Dr. David Thomas, Chief of the Illinois Natural History Survey, DNR (second and third

hearings);

•

Mark Miller, Senior Policy Advisor for Lieutenant Governor Pat Quinn (second hearing);

•

Stan Yonkauski, Deputy Counsel with DNR’s Office of Legal Counsel (third hearing);

•

Albert Ettinger, attorney for Environmental Law & Policy Center, Prairie Rivers

Network, and Sierra Club (third hearing);

•

Todd Main, Director of Policy and Planning, Friends of the Chicago River (third

hearing);

•

Dr. Thomas Murphy, Professor

Emeritus

of Chemistry, DePaul University (third, fourth,

and fifth hearings);

•

Roy Smogor, a stream biologist in IEPA’s Surface Water Section (fourth and fifth

hearings);

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6

•

Joel Cross, Acting Manager of the Watershed Protection Section within the Office of

Resource Conservation of DNR (fourth and fifth hearings);

•

Matthew Short with the Surface Water Section of IEPA (fourth hearing);

•

Ann Holtrop, Watershed Information Specialist with the Watershed Protection Section of

DNR (fourth hearing);

•

Richard Lanyon, General Superintendent of the Metropolitan Water Reclamation District

of Greater Chicago (fourth and fifth hearings);

•

Thomas Muth, District Manager, Fox Metro Water Reclamation District (fifth hearing);

•

Stephen Pescitelli, stream biologist with DNR (fifth hearing);

•

Louis Kollias, Director of the Department of Research and Development with the

Metropolitan Water Reclamation District of Greater Chicago (fifth hearing); and

•

Cindy Skrukrud, Clean Water Advocate for the Illinois Chapter of the Sierra Club (fifth

hearing).

The Board hearing officer accepted 41 hearing exhibits into the record. The hearing

exhibits are described in Appendix I to this opinion and order. Upon receipt, the transcripts of

the hearings were placed in the Clerk’s Office On Line (COOL) on the Board’s Web site at

www.ipcb.state.il.us

.

4

Many other documents from this rulemaking record are available through

COOL, including Board opinions and orders, hearing officer orders, and public comments.

As required by Section 27(b) of the Act (415 ILCS 5/27(b) (2006)), the Board requested,

in a letter of May 11, 2004, that the Department of Commerce and Economic Opportunity

(DCEO) conduct an economic impact study (EcIS) for this rulemaking. In a letter of June 22,

2004, DCEO declined to perform an EcIS, noting its limited fiscal resources. When provided the

opportunity at hearing, no one testified about DCEO’s response. Tr.2 at 159.

The Board received 110 public comments prior to its first-notice decision.

5

Those public

commenters are listed in Appendix II to this opinion and order. The first-notice public comment

period ended on September 17, 2007, 45 days after publication in the

Illinois Register

of the

proposed rule changes.

See

31 Ill. Reg. 11028 (Aug. 3, 2007). The Board received four

additional public comments during the first-notice public comment period:

•

PC 111 filed by the Metropolitan Water Reclamation District of Greater Chicago

(MWRDGC) on August 30, 2007.

•

PC 112 filed by Dr. Thomas Murphy, Professor

Emeritus

of Chemistry, DePaul

University on September 17, 2007.

•

PC 113 filed by IAWA on September 17, 2007.

•

PC 114 filed by IEPA on September 17, 2007 (received September 19, 2007, but

considered timely-filed under the “mailbox rule” at 35 Ill. Adm. Code 101.300(b)(2)).

4

Hearing exhibits are cited as “Exh. _ at _.” The hearing transcripts are cited as “Tr.1 at _” for

the first hearing, “Tr.2 at _” for the second hearing, “Tr.3 at _” for the third hearing, “Tr.4 at _”

for the fourth hearing, and “Tr.5 at _” for the fifth hearing.

5

Public comments are cited as “PC _ at _.”

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7

The Board issued a second-notice opinion and order on November 15, 2007. On January

9, 2008, JCAR issued a certification of no objection concerning the second-notice amendments.

OVERVIEW OF THE BOARD’S MAIN FINDINGS AT FIRST NOTICE

The following is a brief summary of the main findings made by the Board in its 98-page

first-notice opinion of July 12, 2007. First, the Board found that Illinois’ current general use

water quality standard for dissolved oxygen needs to be amended and that those amendments

should be based primarily on USEPA’s NCD for DO.

See

Proposed Amendments to Dissolved

Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 12-14 (July 12, 2007) (first

notice).

Next, the Board agreed with IAWA’s proposed approach of having a two-season DO

standard, one more protective for the sensitive early life stages of fish and another for other life

stages. Further, the Board proceeded to first notice with IAWA’s proposed numeric DO levels

as follows, at least with respect to the vast majority of general use waters: for early life stages, a

daily minimum DO concentration of 5.0 mg/L and a seven-day mean of 6.0 mg/L DO; for other

life stages, a daily minimum DO concentration of 3.5 mg/L and a seven-day mean minimum of

4.0 mg/L DO. As proposed by DNR and IEPA, and ultimately agreed to by IAWA, the Board

also proposed for first notice a 30-day mean DO standard of 5.5 mg/L for other life stages.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip

op. at 34-35 (July 12, 2007) (first notice).

The Board found that the analyses of several grab and semi-continuous DO monitoring

datasets provided in this record indicate that the current Illinois DO standard does not account

for the seasonal variation and diurnal fluctuations of DO naturally occurring in streams. Beyond

that, however, the Board found that helpful conclusions could not be drawn at that time from the

DO datasets for the purposes of this rulemaking.

See

Proposed Amendments to Dissolved

Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 46-49 (July 12, 2007) (first

notice).

The Board agreed with DNR and IEPA that certain stream segments, approximately 8%

of general use stream miles in Illinois, require incrementally enhanced DO standards based on

the presence of meaningful amounts of DO-sensitive aquatic organisms. Accordingly, the Board

proposed for first notice that these stream segments, identified in Appendix D to Part 302, have

the following DO standards: for early life stages, a daily minimum DO concentration of 5.0

mg/L and a seven-day mean of 6.25 mg/L DO; for other life stages, a daily minimum DO

concentration of 4.0 mg/L, a seven-day mean minimum of 4.5 mg/L DO, and a 30-day mean DO

standard of 6.0 mg/L. The Board noted that if a discharger believes these more protective DO

standards are not warranted for a given stream segment, the discharger may seek site-specific

relief from the Board, such as an adjusted standard or site-specific rule under the Act.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip

op. at 68-74 (July 12, 2007) (first notice).

To protect late spring and summer spawning, the Board found that the month of July

should be included in the early life stages (

i.e.

, March through July), as proposed by DNR and

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8

IEPA, rather than having the early life stages timeframe end on June 30, as IAWA had proposed.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25,

slip op. at 79-81 (July 12, 2007) (first notice).

As proposed by DNR and IEPA, and agreed to by IAWA, the Board also proposed for

first notice a narrative DO standard for quiescent and isolated sectors of general use waters, such

as wetlands and waters below the thermocline in lakes, to ensure that the full array of general use

waters are protected. The numeric DO standards would not apply in these isolated waters where

naturally-occurring DO concentrations cannot reasonably be expected to attain numeric values

set for most general use waters.

See

Proposed Amendments to Dissolved Oxygen Standard 35

Ill. Adm. Code 302.206, R04-25, slip op. at 84-85 (July 12, 2007) (first notice).

At first notice, the Board declined to adopt the following suggestions made during this

proceeding: (1) to express the DO water quality standard as percent saturation rather than as

concentration in mg/L; and (2) to include a minimum DO level of 6.5 mg/L for all general use

waters when water temperature is 10°C or below.

See

Proposed Amendments to Dissolved

Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 87-89 (July 12, 2007) (first

notice). The Board also declined to require that any IEPA “implementation rules” for DO

monitoring or permitting be filed in this docket, but the Board did add language to the

DNR/IEPA proposal, more specifically describing the 7-day mean minimum, the 7-day mean,

and the 30-day mean.

Id

. at 92-94.

Additionally, the Board did not include in its first-notice proposal a “waiver” for urban-

impacted streams or a separate “wet weather standard” based on stormwater runoff. Finally, the

Board found that the first-notice proposal would not have an adverse impact on the People of the

State of Illinois.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code

302.206, R04-25, slip op. at 96-97 (July 12, 2007) (first notice).

OVERVIEW OF THE BOARD’S MAIN FINDINGS AT SECOND NOTICE

The following summarizes the main findings made by the Board in its second-notice

opinion of November 15, 2007.

Designating Stream Segments for Enhanced DO Standards

The Board at second notice welcomed IAWA’s change in position, from opposition to

support for including July in early life stage period. The Board disagreed, however, with

IAWA’s position that requiring the more protective DO standards for designated stream

segments, roughly 8% of Illinois’ general use stream miles, was not based on sound science.

The Board noted that its first-notice opinion addressed in great detail the concerns expressed in

IAWA’s last public comment. At second notice, the Board found that IAWA did not raise any

new issues or present any new information to convince the Board to change its course regarding

the enhanced DO standards for particular stream segments.

See

Proposed Amendments to

Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 9 (Nov. 15, 2007)

(second notice), citing Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code

302.206, R04-25, slip op. at 68-74 (July 12, 2007) (first notice).

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9

The Board found that the process of selecting the stream segments targeted for enhanced

protection was based on extensive stream-specific biological information. DNR and IEPA

established the presence of “meaningful amounts” of DO-sensitive organisms in specified

Illinois streams by relying on extensive fish and macroinvertebrate data from approximately

1,100 stream sites across the State. Further, the State agencies relied on reasonable biological

measures, and threshold values based on data from healthy streams to identify stream sites with

meaningful amounts of DO-sensitive organisms. The Board reiterated its earlier finding that the

biological data and scientific literature on the DO-sensitivity of aquatic life were more helpful

than the limited DO datasets for setting DO water quality standards at levels that meet the needs

of aquatic life.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code

302.206, R04-25, slip op. at 10 (Nov. 15, 2007) (second notice), citing Proposed Amendments to

Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 73 (July 12, 2007)

(first notice)

.

The Board stated that when setting water quality standards, it places significant weight on

adopting a standard that fully protects aquatic life, rather than simply trying to arrive at a

standard that would be met by current stream conditions. If stream segments do not meet the

proposed DO standards upon adoption, the Board stated that it would expect those segments to

be assessed in accordance with the requirements of Section 303(d) of the federal Clean Water

Act. That provision requires states to identify and list waters that do not meet applicable water

quality standards or do not fully support their designated uses. This list of impaired waters,

known as the “303(d) list,” is submitted to USEPA for review and approval. The federal Clean

Water Act also requires that a TMDL be developed for each pollutant of an impaired water body.

A TMDL must consider all potential sources of pollutants, whether point or nonpoint. It also

takes into account a margin of safety, which reflects scientific uncertainty, as well as the effects

of seasonal variation. A new DO general use water quality standard in Illinois, the Board noted,

would impact these federally-driven requirements. Importantly, the new standard should be

better tailored than the current DO standard for identifying waters that are actually DO-impaired.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25,

slip op. at 10-11 (Nov. 15, 2007) (second notice)

.

Technical Feasibility and Economic Reasonableness

The Board noted MWRDGC’s assertions that significant portions of the Des Plaines

River System would immediately be out of compliance upon the effective date of the new DO

water quality standards. The Board reemphasized, however, that it “does not establish an

ambient water quality standard for DO based on whether Illinois waters presently comply with

the standard.” Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code

302.206, R04-25, slip op. at 11 (Nov. 15, 2007) (second notice), quoting Proposed Amendments

to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 96 (July 12, 2007)

(first notice). The Board stated that its primary task in this rulemaking is:

to establish the “minimum permissible concentrations of dissolved oxygen” that

will protect aquatic organisms in general use waters based on the scientific

evidence. [415 ILCS 5/13(a)(1) (2006);

see also

PC 103 at 12.] In doing so, the

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10

Board fulfills its responsibility under the federal Clean Water Act to, in IEPA’s

words, “update outdated standards to reflect the current science.” [PC 103 at 12.]

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code

302.206, R04-25, slip op. at 11 (Nov. 15, 2007) (second notice), quoting Proposed

Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25,

slip op. at 96-97 (July 12, 2007) (first notice).

The Board noted that Section 27(a) of the Act directs the Board to take into account the

“technical feasibility and economic reasonableness of measuring or reducing the particular type

of pollution” when conducting a substantive rulemaking. 415 ILCS 5/27(a) (2006). The new

DO standard, the Board observed, likely would indirectly impact technical and economic issues

for particular pollutants in discharges. Section 27(b) of the Act requires the Board to determine

whether a proposed substantive regulation “has any adverse economic impact on the people of

the State of Illinois.” 415 ILCS 5/27(b) (2006). The Board stated that a new DO standard has

the potential to primarily affect wastewater dischargers (

e.g.

, POTWs, industrial dischargers, and

agricultural point and nonpoint sources) that discharge oxygen-depleting substances, including

BOD and nutrients. Tr.4 at 80-84; Statement at 2. The Board found that the issues described by

MWRDGC, however, would not be caused by this rulemaking.

See

Proposed Amendments to

Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 11 (Nov. 15, 2007)

(second notice).

There is no dispute in this record, the Board noted, that there are Illinois streams not

meeting Illinois’ current DO standard, or that both the IAWA proposal and DNR/IEPA proposal

would “result in some significant (but smaller) number of exceedances [violations].” Proposed

Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 11-

12 (Nov. 15, 2007) (second notice), quoting PC 103 at 14. The Board quoted IEPA:

In nearly every instance, this rulemaking is expected to be less restrictive than the

current [DO] standard and therefore less likely to yield exceedances (violations)

of no environmental significance. PC 103 at 11;

see also

Tr.4 at 161 (Lanyon,

General Superintendent of MWRDGC, conceded on cross-examination that

neither IAWA’s nor DNR/IEPA’s proposal “would impose a stricter DO standard

than we have on the books today”).

IEPA went further, maintaining that because the DNR/IEPA-proposed DO standards more

accurately reflect aquatic community needs, the joint-agency proposal “will actually be

economically beneficial by more accurately focusing environmental management resources” on

waters “in need.” PC 103 at 11. The Board, in its first-notice opinion, agreed with IEPA and

found that the amendments proposed for first notice would not have an adverse impact on the

People of the State of Illinois. At second notice, the Board stated that “[n]othing has since been

provided to the Board that would warrant the Board changing this finding at second notice.”

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip

op. at 12 (Nov. 15, 2007) (second notice).

Moreover, added the Board, the Act provides several ways to seek either temporary or

permanent site-specific relief from rules of general applicability, in the form of petitions for

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11

variances, adjusted standards, and site-specific rules. These mechanisms allow for case-by-case

demonstrations before the Board based on factors such as compliance with the general rule

imposing an “arbitrary and unreasonable hardship” (415 ILCS 5/35(a) (2006)), “factors relating

to that petitioner are substantially and significantly different from the factors relied upon by the

Board in adopting the general regulation” (415 ILCS 5/28.1(c)(1) (2006)), and the factors of

“technical feasibility and economic reasonableness” (415 ILCS 5/27(a) (2006)).

See

Proposed

Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 12

(Nov. 15, 2007) (second notice).

In addition, the Board discussed at second notice that the rules would include a narrative

standard, reflecting the fact that under certain natural conditions unaffected by deleterious human

activities, dissolved oxygen may periodically decline below numeric standards to concentrations

typically considered acutely harmful to aquatic life. To address these unavoidable situations, the

Board stated, one component of the proposed narrative standard required that quiescent and

isolated sectors of general use waters be maintained at sufficient DO concentrations to support

their natural ecological functions and resident aquatic communities. The proposed numeric

standards for DO would not apply in these quiescent and isolated sectors, but rather only in the

main body of streams, in the water above the thermocline of thermally stratified lakes and

reservoirs, and in the entire water column of unstratified lakes and reservoirs.

See

Proposed

Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 12-

13 (Nov. 15, 2007) (second notice).

Implementation Concerns

MWRDGC took issue with proposed Section 302.206(d)(3) requiring that DO attainment

measurements “represent the true daily minima and daily means.” PC 111 at 1. MWRDGC

construed this language as suggesting that “some degree of continuous monitoring will be

required,” adding however that the rule language “does not identify how many daily values

should be captured in order to ‘assure’ they are representative.”

Id

. Dr. Murphy also wanted

implementation rules in the proposal, suggesting a margin of error by adding one or more mg/L

to each of the proposed standards to account for measurement uncertainties. PC 112 at 5.

The Board noted that it had discussed implementation concerns extensively at first notice.

As stated in that opinion, the Board declined to require the filing of implementation rules in this

docket.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206

,

R04-25, slip op. at 90-94 (July 12, 2007) (first notice). At second notice, the Board reiterated

that developing or adopting IEPA implementation “rules” was not necessarily a prerequisite to

USEPA approval of these DO water quality standards and that Frevert, Manager of the Division

of Water Pollution Control for IEPA, does not anticipate IEPA adopting any regulations on DO

sampling.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code

302.206, R04-25, slip op. at 13 (Nov. 15, 2007) (second notice).

The new DO standards, the Board stated, would now include 7- and 30-day averages to

help ensure that aquatic organisms are not subject to chronically low DO. This critical

enhancement to Illinois’ current standard alone was expected to lead to additional monitoring

beyond that presently performed to determine compliance with 6.0 mg/L during 16 hours of any

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12

24-hour period and 5.0 mg/L at any time. In its first-notice opinion, the Board found that

subsection (d) of the DNR/IEPA-proposed Section 302.206 provided a detailed account of how

to assess attainment of daily mean and minimum DO values.

The Board agreed, however, with MWRDGC and the environmental groups that

subsection (d) could benefit from specific language on how to assess attainment of the 7-day

mean minimum, the 7-day mean, and the 30-day mean. The Board at first notice therefore added

language on determining the 7- and 30-day values, and the proposed amendments described how

to assess attainment of the DO mean and minimum values. Those provisions were further

refined at second notice, as discussed below. The Board emphasized that the DO data needed to

make these assessments would doubtlessly inform the eventual monitoring process. The Board

continued to agree with IEPA that the temporal detail and measurement techniques necessary to

determine compliance with the DO standard were “an inherent part of the standard itself, not

separate implementation procedures.” Proposed Amendments to Dissolved Oxygen Standard 35

Ill. Adm. Code 302.206, R04-25, slip op. at 13-14 (Nov. 15, 2007) (second notice), quoting

IEPA Resp. to Mot. to Suspend at 3 (Aug. 6, 2004).

On carrying out a measuring program to determine attainment of the DO standard, the

Board quoted the testimony of Frevert, Manager of the Division of Water Pollution Control for

IEPA:

It is their responsibility to assure that the way they design their monitoring system

and the way they collect their data, it is truly representative, not misrepresentative

of the normal variation. You can’t go out and get three samples at nine at night,

ten o’clock at night and eleven o’clock at night and pretend they represent the full

24-hour period. And I’m not trying to specify how many samples is the minimum

to do it correctly. I think that would be a difficult or impossible task, but you

must -- if you’re collecting data and you’re using it to draw conclusions or make

assertions about compliance with this standard, it’s your responsibility to look at

the representativeness of your monitoring scheme and its statistical reliability.

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code

302.206, R04-25, slip op. at 14 (Nov. 15, 2007) (second notice), quoting Tr.4 at

75-76.

IEPA has stated in this record, added the Board, that DO is not routinely included as a National

Pollutant Discharge Elimination System (NPDES) permit effluent concentration and that even

for dischargers located immediately upstream of stream segments selected for enhanced DO

protection, IEPA did not plan to modify its permit issuance approach.

See

Proposed

Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 14-

15 (Nov. 15, 2007) (second notice), citing Tr.4 at 122-23; Tr.5 at 254-56 (less than 1% of Illinois

NPDES discharge permits have conditions requiring in-stream monitoring to assess DO

attainment; the vast majority of the permits have discharge limits of 10 or 20 mg/L CBOD

5

set

under the deoxygenating wastes rule (35 Ill. Adm. Code 304.120)).

As at first notice, the Board carefully reviewed the record and prior relevant rulemaking

precedent. The Board at second notice found that the participants had not raised any new issues

---

13

or provided any new information to convince the Board that implementation rules must or should

be a part of this docket.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm.

Code 302.206, R04-25, slip op. at 15 (Nov. 15, 2007) (second notice). The Board concluded that

this docket had appropriately developed to the point where the Board could propose for second

notice what the dissolved oxygen condition of Illinois general use waters should be, a task

“fundamentally different [from] . . . day-to-day implementation and management and monitoring

and enforcement decisions.”

Id

., Tr.1 at 142-43 (quoting Frevert).

DO Saturation Versus Concentration

The Board reiterated at second notice that USEPA’s NCD does not appear to contemplate

a temperature-triggered DO standard. The two-concentration criteria structure presented in the

NCD and followed by the Board at first notice represented USEPA’s preferred approach, added

the Board. Although dissolved oxygen concentration, partial pressure, and percent saturation are

all interrelated, the Board found that relying on criteria based on concentration in mg/L is the

more direct and practical approach. As to the supporting body of scientific evidence, currently

most DO monitoring data and the scientific literature regarding fish are based on mg/L.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip

op. at 15-16 (Nov. 15, 2007) (second notice).

IEPA commented that it was unaware of any USEPA Region 5 state (

i.e.

, Indiana,

Michigan, Minnesota, Ohio, and Wisconsin, in addition to Illinois) that had adopted numeric DO

standards with applicability based on water temperature. PC 114 at 4. As with the 6.5 mg/L DO

standard proposed by Dr. Murphy and the environmental groups before first notice for waters at

or below 10°C, the Board found at second notice that there was not enough evidence in this

record to demonstrate that Dr. Murphy’s latest proposal of 5 mg/L at 0°C or 4 mg/L at 5-10°C

was necessary or appropriate to supplement the proposed numeric and narrative standards for

Illinois general use waters.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill.

Adm. Code 302.206, R04-25, slip op. at 15-16 (Nov. 15, 2007) (second notice).

Factors for Site-Specific Relief

IAWA agreed with the Board’s first-notice statement that site-specific relief may be

available to a discharger if enhanced DO standards are not warranted for a given stream segment,

but IAWA argued that the proposed regulations should prescribe the specific factors to be

demonstrated by an affected discharger in order to successfully obtain the relief. The Board

declined to amend the proposed DO water quality rules to address site-specific relief at the

second-notice stage of the rulemaking. IAWA had not proposed any specific factors for Board

consideration. The Board welcomed IAWA or any other person to file a rulemaking proposal

addressing the factors for site-specific relief from the DO standards.

See

Proposed Amendments

to Dissolved Oxygen Standard 35 Ill. Adm. Code 302.206, R04-25, slip op. at 16 (Nov. 15,

2007) (second notice). The Board added that in the meanwhile, it would continue to evaluate

requests for site-specific or adjusted water quality standards by relying on the existing statutory

and regulatory criteria.

Id

., citing 415 ILCS 5/28.1(a), (c) (2006); 35 Ill. Adm. Code 104.406,

104.426.

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14

Calendar Days Versus Consecutive 24-Hour Periods

IEPA proposed amendments to the first-notice rule language regarding assessing

attainment of DO standards. Specifically, IEPA suggested that Section 302.206(d), as proposed

for first notice, be modified to avoid restricting the determination of daily means and daily

minima to a “calendar day.” PC 114 at 2. IEPA explained that limiting measurements to a

calendar day, as opposed to any period of 24 consecutive hours, may unintentionally prevent the

use of otherwise valid DO measurements, where the monitoring period did not begin and end at

midnight. The Board agreed with IEPA that requiring measurements to be based on “calendar

days” was unnecessarily restrictive and could lead to wasting resources. The Board accordingly

amended the language for second notice by replacing “calendar days” with “consecutive 24-hour

periods.” The Board’s second-notice proposal was otherwise substantively unchanged from its

first-notice proposal.

See

Proposed Amendments to Dissolved Oxygen Standard 35 Ill. Adm.

Code 302.206, R04-25, slip op. at 1, 16-18, 20 (Nov. 15, 2007) (second notice).

CONCLUSION

Illinois’ current general use water quality standard for dissolved oxygen, adopted in 1972,

is outdated and too simplistic to account for the natural variability of waters and their aquatic

communities across this State. The final DO standard adopted today is consistent with USEPA’s

NCD as adapted to Illinois waters and reflects the current science. By allowing both public and

private resources to be concentrated on general use waters that are truly impaired by low DO

levels, the final amendments promise to significantly and economically enhance the protection of

Illinois aquatic life.

The Board’s adopted amendments, as at first and second notice, include the essential

elements of IAWA’s proposal, but with critical additions originally proposed by DNR and IEPA.

The IAWA proposal of a two-season DO standard with averaging and DO values consistent with

the NCD “warmwater” criteria is a major step toward modernizing the Illinois standard, but it

does not go far enough. It is true that

most

of Illinois’s aquatic organisms can be characterized

as having the DO-sensitivity of “warmwater” organisms and that

most

spawning is completed in

the spring. As this record shows, however, IAWA’s proposal does not adequately address the

fact that there are significant “intermediate” organisms and “late spring and summer spawners”

in Illinois. The Board accordingly is requiring in the final amendments that designated stream

segments (approximately 8% of Illinois’ 71,394 general use stream miles) have enhanced DO

standards based on the presence of meaningful amounts of DO-sensitive organisms and that the

month of July be included in the sensitive “early life stages” timeframe (

i.e.

, March through

July). The record demonstrates that these additional protections over and above the IAWA

proposal are necessary to fully protect Illinois aquatic life.

The Board agrees with Joel Cross, Acting Manager of DNR’s Watershed Protection

Section, that the rule changes adopted today are not a “lowering of dissolved oxygen standards

within some waters during certain times of the year, but rather [a] focusing [of] needed

protection for most sensitive types and life stages of aquatic life where required.” Tr.4 at 46.

The final amendments provide enhanced DO protection when and where it is most needed.

Further, the narrative standard ensures that the full range of general use waters in Illinois is

---

15

protected against low DO. Based on this record, the Board finds, as it did at first and second

notice, that the amendments will not have an adverse impact on the People of the State of

Illinois.

Additionally, the Board recognizes that after implementation of the final DO standard

adopted in this rulemaking, further study may reveal that regulatory relief is warranted for

specific stream stretches. The Act has mechanisms already in place, such as adjusted standards,

that allow for case-by-case, site-specific relief when the necessary demonstrations are made

before the Board.

The Board thanks all of those who have participated in this proceeding. The rulemaking

record had benefited greatly from the active participation of many individuals and organizations,

including Environmental Law & Policy Center, Prairie Rivers Network, Sierra Club, MWRDGC,

and the Office of Lieutenant Governor Pat Quinn. The Board expresses deep gratitude to IAWA,

DNR, and IEPA for their especially thorough contributions to this record.

ORDER

The Board adopts the following amendments to Illinois’ dissolved oxygen general use

water quality standard (35 Ill. Adm. Code 302.206) and directs the Clerk to submit the

amendments to the Secretary of State for publication in the

Illinois Register

as final rules.

TITLE 35: ENVIRONMENTAL PROTECTION

SUBTITLE C: WATER POLLUTION

CHAPTER I: POLLUTION CONTROL BOARD

PART 302

WATER QUALITY STANDARDS

SUBPART A: GENERAL WATER QUALITY PROVISIONS

Section

302.100

Definitions

302.101

Scope and Applicability

302.102

Allowed Mixing, Mixing Zones and ZIDs

302.103

Stream Flows

302.104

Main River Temperatures

302.105

Antidegradation

SUBPART B: GENERAL USE WATER QUALITY STANDARDS

Section

302.201

Scope and Applicability

302.202

Purpose

302.203

Offensive Conditions

302.204

pH

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16

302.205

Phosphorus

302.206

Dissolved Oxygen

302.207

Radioactivity

302.208

Numeric Standards for Chemical Constituents

302.209

Fecal Coliform

302.210

Other Toxic Substances

302.211

Temperature

302.212

Total Ammonia Nitrogen

302.213

Effluent Modified Waters (Ammonia)(Repealed)

SUBPART C: PUBLIC AND FOOD PROCESSING WATER SUPPLY STANDARDS

Section

302.301

Scope and Applicability

302.302

Algicide Permits

302.303

Finished Water Standards

302.304

Chemical Constituents

302.305

Other Contaminants

302.306

Fecal Coliform

302.207

Radium 226 and 228

SUBPART D: SECONDARY CONTACT AND INDIGENOUS AQUATIC LIFE

STANDARDS

Section

302.401

Scope and Applicability

302.402

Purpose

302.403

Unnatural Sludge

302.404

pH

302.405

Dissolved Oxygen

302.406

Fecal Coliform (Repealed)

302.407

Chemical Constituents

302.408

Temperature

302.409

Cyanide

302.410

Substances Toxic to Aquatic Life

SUBPART E: LAKE MICHIGAN BASIN WATER QUALITY STANDARDS

Section

302.501

Scope, Applicability, and Definitions

302.502

Dissolved Oxygen

302.503

pH

302.504

Chemical Constituents

302.505

Fecal Coliform

302.506

Temperature

302.507

Thermal Standards for Existing Sources on January 1, 1971

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17

302.508

Thermal Standards for Sources Under Construction But Not In Operation on

January 1, 1971

302.509

Other Sources

302.510

Incorporations by Reference

302.515

Offensive Conditions

302.520

Regulation and Designation of Bioaccumulative Chemicals of Concern (BCCs)

302.521

Supplemental Antidegradation Provisions for Bioaccumulative Chemicals of

Concern (BCCs)

302.525

Radioactivity

302.530

Supplemental Mixing Provisions for Bioaccumulative Chemicals of Concern

(BCCs)

302.535

Ammonia Nitrogen

302.540

Other Toxic Substances

302.545

Data Requirements

302.550

Analytical Testing

302.553

Determining the Lake Michigan Aquatic Toxicity Criteria or Values - General

Procedures

302.555

Determining the Tier I Lake Michigan Acute Aquatic Toxicity Criterion

(LMAATC): Independent of Water Chemistry

302.560

Determining the Tier I Lake Michigan Basin Acute Aquatic Life Toxicity

Criterion (LMAATC): Dependent on Water Chemistry

302.563

Determining the Tier II Lake Michigan Basin Acute Aquatic Life Toxicity Value

(LMAATV)

302.565

Determining the Lake Michigan Basin Chronic Aquatic Life Toxicity Criterion

(LMCATC) or the Lake Michigan Basin Chronic Aquatic Life Toxicity Value

(LMCATV)

302.570

Procedures for Deriving Bioaccumulation Factors for the Lake Michigan Basin

302.575

Procedures for Deriving Tier I Water Quality Criteria and Values in the Lake

Michigan Basin to Protect Wildlife

302.580

Procedures for Deriving Water Quality Criteria and Values in the Lake Michigan

Basin to Protect Human Health – General

302.585

Procedures for Determining the Lake Michigan Basin Human Health Threshold

Criterion (LMHHTC) and the Lake Michigan Basin Human Health Threshold

Value (LMHHTV)

302.590

Procedures for Determining the Lake Michigan Basin Human Health

Nonthreshold Criterion (LMHHNC) or the Lake Michigan Basin Human Health

Nonthreshold Value (LMHHNV)

302.595

Listing of Bioaccumulative Chemicals of Concern, Derived Criteria and Values

SUBPART F: PROCEDURES FOR DETERMINING WATER QUALITY CRITERIA

Section

302.601

Scope and Applicability

302.603

Definitions

302.604

Mathematical Abbreviations

302.606

Data Requirements

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18

302.612

Determining the Acute Aquatic Toxicity Criterion for an Individual Substance –

General Procedures

302.615

Determining the Acute Aquatic Toxicity Criterion - Toxicity Independent of

Water Chemistry

302.618

Determining the Acute Aquatic Toxicity Criterion - Toxicity Dependent on Water

Chemistry

302.621

Determining the Acute Aquatic Toxicity Criterion - Procedure for Combinations

of Substances

302.627

Determining the Chronic Aquatic Toxicity Criterion for an Individual Substance -

General Procedures

302.630

Determining the Chronic Aquatic Toxicity Criterion - Procedure for

Combinations of Substances

302.633

The Wild and Domestic Animal Protection Criterion

302.642

The Human Threshold Criterion

302.645

Determining the Acceptable Daily Intake

302.648

Determining the Human Threshold Criterion

302.651

The Human Nonthreshold Criterion

302.654

Determining the Risk Associated Intake

302.657

Determining the Human Nonthreshold Criterion

302.658

Stream Flow for Application of Human Nonthreshold Criterion

302.660

Bioconcentration Factor

302.663

Determination of Bioconcentration Factor

302.666

Utilizing the Bioconcentration Factor

302.669

Listing of Derived Criteria

302.APPENDIX A

References to Previous Rules

302.APPENDIX B

Sources of Codified Sections

302.APPENDIX C

Maximum total ammonia nitrogen concentrations allowable for certain

combinations of pH and temperature

302.TABLE A

pH-Dependent Values of the AS (Acute Standard)

302.TABLE

B

Temperature and pH-Dependent Values of the CS (Chronic

Standard) for Fish Early Life Stages Absent

302.TABLE

C

Temperature and pH-Dependent Values of the CS (Chronic

Standard) for Fish Early Life Stages Present

302.APPENDIX D

Section 302.206(d): Stream Segments for Enhanced Dissolved Oxygen

Protection

AUTHORITY: Implementing Section 13 and authorized by Sections 11(b) and 27 of the

Environmental Protection Act [415 ILCS 5/13, 11(b), and 27]

SOURCE: Filed with the Secretary of State January 1, 1978; amended at 2 Ill. Reg. 44, p. 151,

effective November 2, 1978; amended at 3 Ill. Reg. 20, p. 95, effective May 17, 1979; amended

at 3 Ill. Reg. 25, p. 190, effective June 21, 1979; codified at 6 Ill. Reg. 7818; amended at 6 Ill.

Reg. 11161, effective September 7, 1982; amended at 6 Ill. Reg. 13750, effective October 26,

1982; amended at 8 Ill. Reg. 1629, effective January 18, 1984; peremptory amendments at 10 Ill.

Reg. 461, effective December 23, 1985; amended at R87-27 at 12 Ill. Reg. 9911, effective May

---

19

27, 1988; amended at R85-29 at 12 Ill. Reg. 12082, effective July 11, 1988; amended in R88-1 at

13 Ill. Reg. 5998, effective April 18, 1989; amended in R88-21(A) at 14 Ill. Reg. 2899, effective

February 13, 1990; amended in R88-21(B) at 14 Ill. Reg. 11974, effective July 9, 1990; amended

in R94-1(A) at 20 Ill. Reg. 7682, effective May 24, 1996; amended in R94-1(B) at 21 Ill. Reg.

370, effective December 23, 1996; expedited correction at 21 Ill. Reg. 6273, effective December

23, 1996; amended in R97-25 at 22 Ill. Reg. 1356, effective December 24, 1997; amended in

R99-8 at 23 Ill. Reg. 11249, effective August 26, 1999; amended in R01-13 at 26 Ill. Reg. 3505,

effective February 22, 2002; amended in R02-19 at 26 Ill. Reg. 16931, effective November 8,

2002; amended in R02-11 at 27 Ill. Reg. 166, effective December 20, 2002; amended in R04-21

at 30 Ill. Reg. 4919, effective March 1, 2006; amended in R04-25 at 32 Ill. Reg. ___________,

effective ______________.

SUBPART A: GENERAL WATER QUALITY PROVISIONS

Section 302.100

Definitions

Unless otherwise specified, the definitions of the Environmental Protection Act (Act) [415 ILCS

5] and 35 Ill. Adm. Code 301 apply to this Part. As used in this Part, each of the following

definitions has the specified meaning.

"Acute Toxicity" means the capacity of any substance or combination of

substances to cause mortality or other adverse effects in an organism

resulting from a single or short-term exposure to the substance.

"Adverse Effect" means any gross or overt effect on an organism,

including but not limited to reversible histopathological damage, severe

convulsions, irreversible functional impairment and lethality, as well as

any non-overt effect on an organism resulting in functional impairment or

pathological lesions which may affect the performance of the whole

organism, or which reduces an organism's ability to respond to an

additional challenge.

"Chronic Toxicity" means the capacity of any substance or combination of

substances to cause injurious or debilitating effects in an organism which

result from exposure for a time period representing a substantial portion of

the natural life cycle of that organism, including but not limited to the

growth phase, the reproductive phases or such critical portions of the

natural life cycle of that organism.

"Criterion" means the numerical concentration of one or more toxic

substances derived in accordance with the procedures in Subpart F of this

Part which, if not exceeded, would assure compliance with the narrative

toxicity standard of Section 302.210 of this Part.

“Early Life Stages” of fish means the pre-hatch embryonic period, the

post-hatch free embryo or yolk-sac fry, and the larval period, during which

---

20

the organism feeds. Juvenile fish, which are anatomically similar to

adults, are not considered an early life stage.

"Hardness" means a water quality parameter or characteristic consisting of

the sum of calcium and magnesium concentrations expressed in terms of

equivalent milligrams per liter as calcium carbonate. Hardness is

measured in accordance with methods specified in 40 CFR 136,

incorporated by reference in 35 Ill. Adm. Code 301.106.

"Mixing Zone" means a portion of the waters of the State identified as a

region within which mixing is allowed pursuant to Section 302.102(d) of

this Part.

“Thermocline” means the plane of maximum rate of decrease of

temperature with respect to depth in a thermally stratified body of water.

"Total Residual Chlorine" or "TRC" means those substances which

include combined and uncombined forms of both chlorine and bromine

and which are expressed, by convention, as an equivalent concentration of

molecular chlorine. TRC is measured in accordance with methods

specified in 40 CFR 136, incorporated by reference in 35 Ill. Adm. Code

301.106.

"Toxic Substance" means a chemical substance that causes adverse effects

in humans, or in aquatic or terrestrial animal or plant life. Toxic

substances include, but are not limited to, those substances listed in 40

CFR 302.4, incorporated by reference in 35 Ill. Adm. Code 301.106, or

any "chemical substance" as defined by the Illinois Chemical Safety Act

[430 ILCS 45]

"ZID" or "Zone of Initial Dilution" means a portion of a mixing zone,

identified pursuant to Section 302.102(e) of this Part, within which acute

toxicity standards need not be met.

(Source: Amended at 32 Ill. Reg. __________, effective ________________)

SUBPART B: GENERAL USE WATER QUALITY STANDARDS

Section 302.206

Dissolved Oxygen

General use waters must maintain dissolved oxygen concentrations at or above the values

contained in subsections (a), (b) and (c) of this Section. Dissolved oxygen (STORET number

00300) shall not be less than 6.0 mg/L during at least 16 hours of any 24 hour period, nor less

than 5.0 mg/L at any time.

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21

a)

General use waters at all locations must maintain sufficient dissolved

oxygen concentrations to prevent offensive conditions as required in

Section 302.203 of this Part. Quiescent and isolated sectors of General

Use waters including but not limited to wetlands, sloughs, backwaters and

waters below the thermocline in lakes and reservoirs must be maintained

at sufficient dissolved oxygen concentrations to support their natural

ecological functions and resident aquatic communities.

b)

Except in those waters identified in Appendix D of this Part, the dissolved

oxygen concentration in the main body of all streams, in the water above

the thermocline of thermally stratified lakes and reservoirs, and in the

entire water column of unstratified lakes and reservoirs must not be less

than the following:

1)

During the period of March through July,

A)

5.0 mg/L at any time; and

B)

6.0 mg/L as a daily mean averaged over 7 days.

2)

During the period of August through February,

A)

3.5 mg/L at any time;

B)

4.0 mg/L as a daily minimum averaged over 7 days; and

C)

5.5 mg/L as a daily mean averaged over 30 days.

c)

The dissolved oxygen concentration in all sectors within the main body of

all streams identified in Appendix D of this Part must not be less than:

1)

During the period of March through July,

A)

5.0 mg/L at any time; and

B)

6.25 mg/L as a daily mean averaged over 7 days.

2)

During the period of August through February,

A)

4.0 mg/L at any time;

B)

4.5 mg/L as a daily minimum averaged over 7 days; and

C)

6.0 mg/L as a daily mean averaged over 30 days.

d)

Assessing attainment of dissolved oxygen mean and minimum values.

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22

1)

Daily mean is the arithmetic mean of dissolved oxygen

concentrations in 24 consecutive hours.

2)

Daily minimum is the minimum dissolved oxygen concentration in

24 consecutive hours.

3)

The measurements of dissolved oxygen used to determine

attainment or lack of attainment with any of the dissolved oxygen

standards in this Section must assure daily minima and daily means

that represent the true daily minima and daily means.

4)

The dissolved oxygen concentrations used to determine a daily

mean or daily minimum should not exceed the air-equilibrated

concentration.

5)

“Daily minimum averaged over 7 days” means the arithmetic mean of

daily minimum dissolved oxygen concentrations in 7 consecutive 24-hour

periods.

6)

“Daily mean averaged over 7 days” means the arithmetic mean of daily

mean dissolved oxygen concentrations in 7 consecutive 24-hour periods.

7)

“Daily mean averaged over 30 days” means is the arithmetic mean of daily

mean dissolved oxygen concentrations in 30 consecutive 24-hour periods.

(Source: Amended at 32 Ill. Reg. __________, effective ________________)

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23

302.Appendix D Section 302.206(d): Stream Segments for Enhanced Dissolved Oxygen Protection

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

Illinois

Aux Sable Creek

239

start 41.3982125891033

-88.3307365155966 GRUNDY

end 41.5221610266554

-88.3153074461322 KENDALL

Baker Creek

123

start 41.0993159446094

-87.833779044559 KANKAKEE

end 41.1187483257075

-87.7916507082604 KANKAKEE

Baptist Creek

160

start 40.5172643895406

-90.9781701980636 HANCOCK

end 40.5217773790395

-90.9703232423026 HANCOCK

Barker Creek

170

start 40.4730175690641

-90.3623822544051 FULTON

end 40.4505102531327

-90.423698306895 FULTON

Battle Creek

196

start 41.791467372356

-88.6440656199133 DEKALB

end 41.8454435074814

-88.6580317835588 DEKALB

Big Bureau Creek

209

start 41.2403303426443

-89.3778305139628 BUREAU

end 41.6599418992971

-89.0880711727354 LEE

Big Rock Creek

275

start 41.6325949399571

-88.5379727020413 KENDALL

end 41.7542831812644

-88.5621629654129 KANE

Blackberry Creek

271

start 41.6432480686252

-88.451129393594 KENDALL

end 41.7663693677829

-88.3855968808499 KANE

Boone Creek

284

start 42.3430701828297

-88.2604646456881 MCHENRY

end 42.3116813126792

-88.3284649937798 MCHENRY

Buck Creek

225

start 41.4305449377211

-88.7732713228626 LASALLE

end 41.4508806057478

-88.919966063547 LASALLE

403

start 40.6513984442885

-88.8660496976016 MCLEAN

---

24

end 40.6757825960266

-88.8490439132056 MCLEAN

Camp Creek

116

start 41.0119168530464

-89.7317034650143 STARK

end 41.0202988179758

-89.6817209218761 STARK

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25

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

168

start 40.2936155016035

-90.7791785207262 MCDONOUGH

end 40.3985161419285

-90.5089903510732 MCDONOUGH

Camp Run

115

start 41.0119168530464

-89.7317034650143 STARK

end 41.0575944852479

-89.6822685234528 STARK

Cantway Slough

250

start 41.1654521279715

-87.6179423055771 KANKAKEE

end 41.1204910206261

-87.6018847740212 KANKAKEE

Cedar Creek

164

start 40.4187924503946

-91.0119249544251 HANCOCK

end 40.4320989747514

-90.9816512014458 HANCOCK

Central Ditch

17

start 40.2466345144431

-89.8605138200519 MASON

end 40.259146892407

-89.8331744969958 MASON

Clear Creek

70

start 40.2358631766436

-89.1715114085864 LOGAN

end 40.2817523596784

-89.2105606026356 MCLEAN

Coal Creek

173

start 40.6458316286298

-90.2773695191768 FULTON

end 40.6911917975894

-90.0990104026141 FULTON

Collins Run

243

start 41.4219631544372

-88.3508108111242 GRUNDY

end 41.4172036201222

-88.3955434158999 GRUNDY

Conover Branch

184

start 39.8376993452498

-90.1465720267561 MORGAN

end 39.8696939232648

-90.1234898871846 MORGAN

Coon Creek

60

start 40.1076562155273

-89.0130117597621 DEWITT

end 40.1755351290733

-88.8857086715202 DEWITT

Coop Branch

31

end 39.2042878811665

-90.0972130791043 MACOUPIN

end 39.1194481626997

-89.9878509202749 MACOUPIN

Coopers Defeat Creek

114

start 41.1557502062867

-89.748162019475 STARK

---

26

end 41.1485959333575

-89.6944246708098 STARK

Copperas Creek

88

start 40.4856512052475

-89.8867983078194 FULTON

end 40.549513691198

-89.9011907117391 FULTON

Court Creek

122

---

27

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 40.9184191403691

-90.1108008628507 KNOX

end 40.9349919352638

-90.2673514797552 KNOX

Cox Creek

177

start 40.0231674243157

-90.1158780774246 CASS

end 39.9657957063914

-90.0180644049351 CASS

Crane Creek

174

start 40.1328714038267

-89.9709414534257 MENARD

end 40.2466345144431

-89.8605138200519 MASON

Crow Creek

102

start 40.9323207251964

-89.4264477600798 MARSHALL

end 40.9663161180876

-89.2558617294218 MARSHALL

Deer Creek

59

start 40.117679723776

-89.3801215076251 LOGAN

end 40.1915602627115

-89.1582023776838 LOGAN

Dickerson Slough

421

start 40.3597968706068

-88.3225685158141 CHAMPAIGN

end 40.4568389800294

-88.3442742579475 FORD

Drummer Creek

423

start 40.37389931547 -88.3480753423386 CHAMPAIGN

end 40.479101489993

-88.388698487066 FORD

Dry Fork

35

start 39.1989703827155

-89.9609795725648 MACOUPIN

end 39.1445756951412

-89.8876581181152 MACOUPIN

Du Page River

268

start 41.4988385272507

-88.2166248594859 WILL

end 41.7019525201778

-88.1476209409341 WILL

Eagle Creek

392

start 41.1360015419764

-88.8528525904771 LASALLE

end 41.1291172842462

-88.8664977236647 LASALLE

East Aux Sable Creek

240

start 41.5221610266554

-88.3153074461322 KENDALL

end 41.6231669397764

-88.2938779285952 KENDALL

East Branch Big Rock Creek

277

start 41.7542830239271

-88.5621632556731 KANE

end 41.8161922949561

-88.6002917634599 KANE

---

28

East Branch Copperas Creek

47

start 40.549514632509

-89.901189903351 FULTON

---

29

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

end 40.6583152735498

-89.8516717710553 PEORIA

East Fork La Moine River

167

start 40.3962156185095

-90.9339386121768 HANCOCK

end 40.4506930058171

-90.758703782814 MCDONOUGH

East Fork Mazon River

256

start 41.1872307009926

-88.2731640461448 GRUNDY

end 41.0815161304671

-88.3093601699244 LIVINGSTON

East Fork Spoon River

110

start 41.2158736312898

-89.6870256054763 STARK

end 41.2603216291895

-89.7311074496692 BUREAU

Easterbrook Drain

410

start 40.3687232740908

-88.5787269955356 MCLEAN

end 40.3909243275675

-88.5484031360558 MCLEAN

Exline Slough

252

start 41.1187483257075

-87.7916507082604 KANKAKEE

end 41.3377194296138

-87.674538578544 WILL

Fargo Run

94

start 40.8110626738718

-89.7625906815013 PEORIA

end 40.7936211492847

-89.7147157689809 PEORIA

Ferson Creek

281

start 41.9275380999085

-88.3177738518806 KANE

end 41.9518312998438

-88.3965138071814 KANE

Fitch Creek

131

start 41.0629732421579

-89.9929808862433 KNOX

end 41.1048465021615

-90.0171275726119 KNOX

Forked Creek

265

start 41.312634893655

-88.1518349597477 WILL

end 41.4208599921871

-87.8221168060732 WILL

Forman Creek

129

start 41.0920068762041

-90.1229512077171 KNOX

end 41.061779692349

-90.1373931430424 KNOX

Fourmile Grove Creek

232

start 41.5880621752377

-89.0154533767497 LASALLE

end 41.6281572065102

-89.0480036727754 LEE

Fox Creek

---

30

121

start 41.2158736312898

-89.6870256054763 STARK

end 41.2178841576744

-89.6378797955943 BUREAU

Fox River

270

start 41.6177003859476

-88.5558384703467 KENDALL

end 41.7665361019038

-88.3100243828453 KANE

---

31

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

Friends Creek

56

start 39.9296881580789

-88.7753341828841 MACON

end 40.0511150621524

-88.756810733868 MACON

Furrer Ditch

175

start 40.259146892407

-89.8331744807195 MASON

end 40.256856262248

-89.8235353908665 MASON

Gooseberry Creek

138

start 41.0815161304671

-88.3093601699244 LIVINGSTON

end 41.0229178273291

-88.3433997610298 LIVINGSTON

181

start 41.2273512263311

-88.3737634512576 GRUNDY

end 41.1567969821084

-88.3954921510714 GRUNDY

Grindstone Creek

169

start 40.2936155016035

-90.7791785207262 MCDONOUGH

end 40.3128991202966

-90.6514786739624 MCDONOUGH

Hall Ditch

176

start 40.214043063866

-89.8947856138658 MASON

end 40.1996396083582

-89.8430392085184 MASON

Hallock Creek

101

start 40.9330251540704

-89.523027406387 PEORIA

end 40.9162496002415

-89.5368879858621 PEORIA

Haw Creek

125

start 40.8575772861862

-90.2335091570553 KNOX

end 40.9174343445877

-90.3387634753254 KNOX

Henline Creek

401

start 40.5867014223785

-88.6971328093932 MCLEAN

end 40.6247936449316

-88.6315733675586 MCLEAN

Henry Creek

100

start 40.932455717876

-89.5256512687818 PEORIA

end 40.9472322228041

-89.5711427004422 PEORIA

Hermon Creek

126

start 40.7818347201379

-90.2738699961108 KNOX

end 40.7628476930817

-90.3372052339614 KNOX

Hickory Creek

244

start 41.5038289458964

-88.0990240076033 WILL

---

32

end 41.4935392717868

-87.8108342251738 WILL

Hickory Grove Ditch

87

start 40.4870721779667

-89.7285827911466 TAZEWELL

end 40.4136575635669

-89.7349507058786 MASON

Hickory Run

93

---

33

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 40.8217198390551

-89.7449749384213 PEORIA

end 40.8581447502391

-89.7622130910013 PEORIA

Hillsbury Slough

416

start 40.3453953438371

-88.3035309970523 CHAMPAIGN

end 40.3928682378873

-88.2265028280313 CHAMPAIGN

Hodges Creek

34

start 39.2630316914552

-90.1858200381692 GREENE

end 39.2801974743086

-90.1528766403572 GREENE

Hurricane Creek

44

start 39.449376470161

-90.5400508230403 GREENE

end 39.4781872332274

-90.4508986197452 GREENE

Illinois River

236

start 41.3255740245957

-88.9910230492306 LASALLE

end 41.3986780470527

-88.2686499362959 GRUNDY

Indian Creek

120

start 40.988610901184

-89.8221496834014 STARK

end 41.2003389912185

-89.9349435285117 HENRY

182

start 39.8785447641605

-90.3782080959549 CASS

end 39.8234731084942

-90.103743390331 MORGAN

224

start 41.7480730242898

-88.8741562924388 DEKALB

end 41.7083887626958

-88.9437996894049 LEE

226

start 41.4400734113231

-88.7627018786422 LASALLE

end 41.7377348577433

-88.8557728844589 DEKALB

396

start 40.7701181840118

-88.4858209632899 LIVINGSTON

end 40.6469799222669

-88.4812665778082 LIVINGSTON

Iroquois River

253

start 41.0739205590002

-87.8152251833303 KANKAKEE

end 40.9614905075375

-87.8149010739444 IROQUOIS

447

start 40.7817769095357

-87.7532807121524 IROQUOIS

end 40.8174648935578

-87.5342555764515 IROQUOIS

Jack Creek

109

start 41.1283656948767

-89.7699479168181 STARK

end 41.150467875432

-89.8374616586589 STARK

Jackson Creek

---

34

246

start 41.4325013563553

-88.1725611633353 WILL

end 41.4638503957577

-87.9160301224816 WILL

Joes Creek

33

start 39.2801974743086

-90.1528766403572 GREENE

end 39.3757180969001

-90.0772968234561 MACOUPIN

---

35

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

Johnny Run

258

start 41.2826709079541

-88.3633805819326 GRUNDY

end 41.0807507198308

-88.5801638050665 LIVINGSTON

Jordan Creek

266

start 41.3044458242397

-88.1279087273328 WILL

end 41.3077177643453

-88.1188984685001 WILL

Judd Creek

106

start 41.089645284216

-89.1847595119809 MARSHALL

end 41.0429807674449

-89.1339049242164 MARSHALL

Kankakee River

248

start 41.3923135096469

-88.2590124225285 GRUNDY

end 41.1660752568715

-87.526360971907 KANKAKEE

Kickapoo Creek

57

start 39.9932216924528

-88.8083252484687 MACON

end 39.9987405799186

-88.8205170598483 MACON

65

start 40.1286520491088

-89.4532728967436 LOGAN

end 40.4376592310728

-88.8667409562596 MCLEAN

92

start 40.6548826785105

-89.6134608723157 TAZEWELL

end 40.9170471944911

-89.6577393908301 PEORIA

Kings Mill Creek

83

start 40.4558745105979

-89.1642930044364 MCLEAN

end 40.509184986927

-89.0937965002854 MCLEAN

La Harpe Creek

159

start 40.4678428297867

-91.0424167497572 HANCOCK

end 40.5172643895406

-90.9781701980636 HANCOCK

La Moine River

158

start 40.3320849972693

-90.8997234923388 MCDONOUGH

end 40.5923258750258

-91.0177293656635 HANCOCK

Lake Fork

61

start 40.0837107988142

-89.3969397975165 LOGAN

end 39.9367293000733

-89.2343282851812 LOGAN

Langan Creek

254

start 40.9614905075375

-87.8149010739444 IROQUOIS

end 40.9432018898477

-88.0465558527168 IROQUOIS

---

36

Lime Creek

214

start 41.4515003790233

-89.5271752648714 BUREAU

end 41.4951141474998

-89.456554884734 BUREAU

Little Indian Creek

183

start 39.8355964564522

-90.1231971747256 MORGAN

---

37

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

end 39.8658175367056

-90.0423591294145 MORGAN

227

start 41.5091299863247

-88.7725444056074 LASALLE

end 41.749433980972

-88.8141442269697 DEKALB

Little Kickapoo Creek

67

start 40.3336625070255

-88.9736094275975 MCLEAN

end 40.394785197415

-88.9473142490326 MCLEAN

Little Mackinaw River

82

start 40.4423190352496

-89.4617848276975 TAZEWELL

end 40.4481261917524

-89.4329939054056 TAZEWELL

Little Rock Creek

274

start 41.6345548769785

-88.5384723455853 KENDALL

end 41.7895688619816

-88.6981590581244 DEKALB

Little Sandy Creek

107

start 41.0912632622075

-89.2247552498617 MARSHALL

end 41.125352501365

-89.1758716886846 PUTNAM

Little Senachwine Creek

99

start 40.9533145540839

-89.5292433956921 PEORIA

end 41.0084439145565

-89.5499765139822 MARSHALL

Little Vermilion River

233

start 41.3237602050852

-89.0811945323001 LASALLE

end 41.5760289435671

-89.0829047126545 LASALLE

Lone Tree Creek

418

start 40.3750682121535

-88.3819688457729 CHAMPAIGN

end 40.3145980401842

-88.4738655755984 MCLEAN

Long Creek

163

start 40.4466427913955

-91.0499607552846 HANCOCK

end 40.4297652043359

-91.1507109600489 HANCOCK

Long Point Creek

68

start 40.2755311999445

-89.0786438507327 DEWITT

end 40.2549604211821

-88.9826285651361 DEWITT

394

start 41.038177645276

-88.7908409579793 LIVINGSTON

end 41.0018214714974

-88.8534349418926 LIVINGSTON

Mackinaw River

397

start 40.5796794158534

-89.2813445945626 TAZEWELL

---

38

end 40.5649627479232

-88.478822725546 MCLEAN

Macoupin Creek

32

start 39.1989703827155

-89.9609795725648 MACOUPIN

start 39.2121253451487

-90.2312084410337 JERSEY

Madden Creek

413

---

39

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 40.0943580002069

-88.5400649488702 PIATT

end 40.2109635906658

-88.4943738561926 PIATT

Masters Creek

220

start 41.4976109383336

-89.4125473607076 BUREAU

end 41.5439000049343

-89.421988392756 BUREAU

Masters Fork

217

start 41.4531024225454

-89.4290492805799 BUREAU

end 41.5702310455498

-89.3821188149649 BUREAU

Mazon River

257

start 41.3086768327676

-88.3389845675056 GRUNDY

end 41.1872307009926

-88.2731640461448 GRUNDY

Mendota Creek

234

start 41.5281666288805

-89.1041764154672 LASALLE

end 41.5282367334928

-89.1224368860589 LASALLE

Middle Branch of Copperas Creek

90

start 40.549514632509

-89.901189903351 FULTON

end 40.5980896362772

-89.9368482699851 FULTON

Middle Creek

165

start 40.3957329294144

-90.9741776721721 HANCOCK

end 40.3888894030526

-91.0072502737366 HANCOCK

Mill Creek

494

start 41.8213649020421

-88.3222376599138 KANE

end 41.9231053361497

-88.4419826012614 KANE

Mole Creek

390

start 41.0193910577853

-88.8019375580673 LIVINGSTON

end 40.9109452909954

-88.9263176124884 LIVINGSTON

Morgan Creek

272

start 41.6481172046369

-88.4151168308869 KENDALL

end 41.6530911245692

-88.3631669287476 KENDALL

Mud Creek

449

start 40.637099482441

-87.5885960450541 IROQUOIS

end 40.6100172186722

-87.5261312404789 IROQUOIS

Mud Run

117

start 41.0092425694765

-89.7790957399812 STARK

end 40.9876287937001

-89.6785472090663 STARK

---

40

Murray Slough

259

start 41.2428845425989

-88.3615508333781 GRUNDY

end 41.054741775769

-88.5825975362008 LIVINGSTON

Nettle Creek

237

start 41.3559056532822

-88.4326806825019 GRUNDY

---

41

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

end 41.3989525138118

-88.5519708865374 GRUNDY

Nippersink Creek

285

start 42.403479031235

-88.1904263022916 LAKE

end 42.408321560969

-88.341299199739 MCHENRY

289

start 42.3885864249526

-88.3641081665149 MCHENRY

end 42.4692291197455

-88.4764236384547 MCHENRY

North Branch Crow Creek

103

start 40.9663161180876

-89.2558617294218 MARSHALL

end 41.0005549578781

-89.1943061363378 MARSHALL

North Branch Nippersink Creek

286

start 42.4376632559979

-88.2872504317539 MCHENRY

end 42.4945866793007

-88.3294075716268 MCHENRY

North Creek

119

start 40.9486975483619

-89.7633680090807 PEORIA

end 40.9421533616142

-89.7281078793964 PEORIA

North Fork Lake Fork

62

start 39.9367293000733

-89.2343282851812 LOGAN

end 40.0523211989442

-89.0999303242614 DEWITT

North Fork Salt Creek

71

start 40.2675598120912

-88.7867164044023 DEWITT

end 40.3620541452609

-88.7204600533309 MCLEAN

Otter Creek

171

start 40.2161621556914

-90.164317977292 FULTON

end 40.3182822717998

-90.3860609925548 FULTON

279

start 41.9619670384069

-88.3574449893747 KANE

end 41.9903303640688

-88.3568570687618 KANE

393

start 41.1611802253124

-88.8310854379729 LASALLE

end 41.1541734588026

-88.7148550047115 LASALLE

Panther Creek

178

start 40.0231674243157

-90.1158780774246 CASS

end 39.9411115612757

-90.0607356525317 CASS

405

start 40.6607941387838

-89.196034413193 WOODFORD

end 40.8483817762616

-89.0003562591212 WOODFORD

Paw Paw Run

---

42

231

start 41.6177945875792

-88.8847204360202 LASALLE

end 41.6630271288718

-88.9144064528509 DEKALB

Pike Creek

216

start 41.5121637096396

-89.3366888940457 BUREAU

end 41.5707857354427

-89.2125163729316 BUREAU

---

43

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

388

start 40.8655185113965

-88.7090974772719 LIVINGSTON

end 40.7989226101833

-88.7756316859923 LIVINGSTON

Pond Creek

212

start 41.3494925800361

-89.5685244208084 BUREAU

end 41.3541221673156

-89.6001721270724 BUREAU

Poplar Creek

493

start 42.0127893042098

-88.2799278350546 KANE

end 42.0604682884044

-88.151517184544 COOK

Prairie Creek

69

start 40.2688606116755

-89.1209318708141 DEWITT

end 40.3183618654781

-89.1150133167993 MCLEAN

79

start 40.1610672222447

-89.6159697428554 MASON

end 40.3105388304102

-89.4819788351989 LOGAN

264

start 41.3410818305214

-88.1859963163497 WILL

end 41.4048430210988

-87.9636949110551 WILL

391

start 41.0691920852358

-88.8106812576958 LIVINGSTON

end 41.0162806406811

-89.0122375626521 LASALLE

Prairie Creek Ditch

81

start 40.242940205103

-89.5831738921535 LOGAN

end 40.268603376062

-89.5902703680441 LOGAN

Prince Run

118

start 40.9953442805941

-89.7634490486344 STARK

end 40.9486975483619

-89.7633680090807 PEORIA

Rob Roy Creek

495

start 41.6340658591268

-88.530902327864 KENDALL

end 41.7208669225124

-88.4449822691918 KENDALL

Rock Creek

180

start 39.9533586794244

-89.7717217346798 MENARD

end 39.9192042890665

-89.881417605895 MENARD

251

start 41.2029705333006

-87.9860450524621 KANKAKEE

end 41.2416733683013

-87.9199539652218 KANKAKEE

Rocky Run

221

start 41.2966432755716

-89.5031050607007 BUREAU

---

44

end 41.2892114895079

-89.5271301009319 BUREAU

Rooks Creek

386

start 40.9620056243899

-88.737743684525 LIVINGSTON

end 40.7615433072922

-88.6752675977812 LIVINGSTON

Salt Creek

58

---

45

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 40.1286520491088

-89.4532728967436 LOGAN

end 40.1404369482862

-88.8817439726269 DEWITT

409

start 40.2793653821328

-88.6019348286105 DEWITT

end 40.3687232740908

-88.5787269955356 MCLEAN

Sandy Creek

105

start 41.1083947129797

-89.3471796913242 PUTNAM

end 41.0855613697751

-89.0792291942694 MARSHALL

Sangamon River

408

start 40.0056362283258

-88.6286241506431 PIATT

end 40.4223231153926

-88.67328493366 MCLEAN

Senachwine Creek

96

start 40.929825860388

-89.4632928486271 PEORIA

end 41.0900318754938

-89.5885134178247 MARSHALL

Short Creek

162

start 40.4611057719393

-91.0582083107674 HANCOCK

end 40.4682735975769

-91.0704506789577 HANCOCK

Short Point Creek

389

start 40.9883827214271

-88.7830008925065 LIVINGSTON

end 40.8951301673701

-88.8749997260932 LIVINGSTON

Silver Creek

111

start 41.2185762138697

-89.6793069447094 STARK

end 41.2431713087936

-89.6494927441058 BUREAU

South Branch Crow Creek

104

start 40.9663161180876

-89.2558617294218 MARSHALL

end 40.9410075148431

-89.1948285503851 MARSHALL

South Branch Forked Creek

267

start 41.2631372965881

-88.0315238211836 WILL

end 41.292604367733

-87.9621751169561 KANKAKEE

South Fork Lake Fork

63

start 39.9367293000733

-89.2343282851812 LOGAN

end 39.9674631778105

-89.0884701339793 MACON

South Fork Vermilion River

395

start 40.7701181840118

-88.4858209632899 LIVINGSTON

end 40.7234241258087

-88.355790853647 LIVINGSTON

Spoon River

---

46

3

start 40.883272448156

-90.0994555125119 KNOX

end 41.2158736312898

-89.6870256054763 STARK

Spring Creek

161

start 40.5838583294631

-91.0397056763892 HANCOCK

end 40.595079516268

-91.0572149428165 HANCOCK

---

47

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

166

start 40.4506930058171

-90.758703782814 MCDONOUGH

end 40.5047702003096

-90.7202911238868 MCDONOUGH

223

start 41.3114342012759

-89.1969933188526 BUREAU

end 41.5341774964794

-89.1599030581214 LASALLE

Stevens Creek

55

start 39.833172054334

-89.008501860042 MACON

end 39.8725126750168

-88.9902570309468 MACON

Sugar Creek

76

start 40.1505909949415

-89.6335239996087 MENARD

end 40.3515916252906

-89.1626966142058 MCLEAN

124

start 40.9273148603695

-90.1168866799652 KNOX

end 40.9407150872189

-90.126984172004 KNOX

448

start 40.7817769095357

-87.7532807121524 IROQUOIS

end 40.650106664471

-87.5259225515566 IROQUOIS

Sutphens Run

228

start 41.5813276727649

-88.9196815109252 LASALLE

end 41.5940767755281

-89.0434408697488 LASALLE

Swab Run

127

start 40.8043825531334

-90.0417502151246 KNOX

end 40.8089204046364

-89.9959890937906 KNOX

Tenmile Creek

64

start 40.1166122038468

-89.0605809659338 DEWITT

end 40.1573804135529

-88.9870426654374 DEWITT

Timber Creek

77

start 40.3499903738803

-89.1633832938062 MCLEAN

end 40.3824906556377

-89.0653243216353 MCLEAN

Trim Creek

249

start 41.1679695055755

-87.6275919071884 KANKAKEE

end 41.3235679470585

-87.6273348723156 WILL

Turkey Creek

172

start 40.5312633037562

-90.2784734138591 FULTON

end 40.6100168551688

-90.1683886238592 FULTON

402

start 40.6346912128201

-88.8256051903746 MCLEAN

---

48

end 40.6636296144043

-88.7848217949076 MCLEAN

Tyler Creek

283

start 42.057069434075

-88.2869209701875 KANE

end 42.0886074301339

-88.3939734393445 KANE

Unnamed Tributary

230

---

49

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 41.6008353940091

-88.9239309686064 LASALLE

end 41.6393800996109

-88.95237726256 LEE

406

start 40.8483817762616

-89.0003562591212 WOODFORD

end 40.8446321845668

-88.9879480330159 WOODFORD

Unnamed Tributary of Big Bureau Creek

222

start 41.2923889187328

-89.4849627504116 BUREAU

end 41.2746773653832

-89.4967232161933 BUREAU

Unnamed Tributary of Coopers Defeat Creek

113

start 41.1485959333575

-89.6944246708098 STARK

end 41.1432423938169

-89.6549152326434 STARK

Unnamed Tributary of Dickerson Slough

422

start 40.4068214049304

-88.3388760698826 FORD

end 40.4286849455119

-88.3118606581845 FORD

Unnamed Tributary of Drummer Creek

425

start 40.430183509928

-88.3944923485681 FORD

end 40.4228198536222

-88.4420280012069 FORD

Unnamed Tributary of East Branch of Copperas Creek

89

start 40.59257130763 -89.8385498955685 PEORIA

start 40.59257130763 -89.8385498955685 PEORIA

Unnamed Tributary of East Fork of Spoon River

112

start 41.1911731339471

-89.6948993736812 STARK

end 41.1958777466981

-89.6635132189552 STARK

Unnamed Tributary of Indian Creek

185

start 39.8195431621523

-90.231206997871 MORGAN

end 39.7997709298014

-90.2444898890822 MORGAN

229

start 41.5989641246871

-88.913295513256 LASALLE

end 41.6212302072922

-88.9971274321449 LASALLE

Unnamed Tributary of Jackson Creek

247

start 41.4328713295604

-88.0777949404827 WILL

end 41.4181859202087

-88.0389954976751 WILL

Unnamed Tributary of Johnny Run

261

start 41.1315090714299

-88.5704499691513 GRUNDY

end 41.1211734141418

-88.5813177275807 GRUNDY

Unnamed Tributary of Kickapoo Creek

66

---

50

start 40.4376592310728

-88.8667409562596 MCLEAN

end 40.4499435649154 -88.7941853627565

MCLEAN

95

start 40.843847234267

-89.6598940056171 PEORIA

end 40.8376970553513

-89.655765678658 PEORIA

---

51

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

Unnamed Tributary of Lone Tree Creek

417

start 40.3145980401842

-88.4738655755984 MCLEAN

end 40.3084681821929

-88.4721825603404 MCLEAN

419

start 40.3200878690807

-88.4758169784284 MCLEAN

end 40.3246054213609

-88.502979969789 MCLEAN

420

start 40.3555955038811

-88.4486860730234 CHAMPAIGN

end 40.3553786361326

-88.4890287857383 MCLEAN

Unnamed Tributary of Mackinaw River

398

start 40.5649627479232

-88.478822725546 MCLEAN

end 40.4956570103387

-88.5106552787079 MCLEAN

399

start 40.558742486097

-88.5447290418444 MCLEAN

end 40.532461937187

-88.5550436512012 MCLEAN

400

start 40.5536214693649

-88.6155771894066 MCLEAN

end 40.5386135050112

-88.6150100834316 MCLEAN

Unnamed Tributary of Masters Creek

219

start 41.5407471962821

-89.4154110620948 BUREAU

end 41.5452528261938

-89.4136798690744 BUREAU

Unnamed Tributary of Masters Fork

218

start 41.510430587881

-89.3900507138719 BUREAU

end 41.6181398940954

-89.2965280984998 LEE

Unnamed Tributary of Nettle Creek

238

start 41.4088814108094

-88.5216683950888 GRUNDY

end 41.4186133676397

-88.5339604493093 GRUNDY

Unnamed Tributary of Nippersink Creek

255

start 42.4692291197455

-88.4764236384547 MCHENRY

end 42.4695432978934

-88.5110499918451 MCHENRY

288

start 42.4176539163554

-88.3444740410368 MCHENRY

end 42.4179067763647

-88.3502762821058 MCHENRY

290

start 42.3969278131381

-88.4109784072142 MCHENRY

end 42.3875994074602

-88.4491666706176 MCHENRY

Unnamed Tributary of North Fork of Salt Creek

72

start 40.3598944577027

-88.7302360564635 MCLEAN

end 40.3817246400667

-88.7481607936989 MCLEAN

---

52

73

start 40.3620541452609

-88.7204600533309 MCLEAN

end 40.3690272117515

-88.6961244618476 MCLEAN

75

start 40.2987649882463

-88.7603546124853 MCLEAN

end 40.3051172967471

-88.7525145171727 MCLEAN

Unnamed Tributary of Panther Creek

---

53

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

179

start 39.9411115612757

-90.0607356525317 CASS

end 39.9350887523192

-90.047762075576 CASS

Unnamed Tributary of Pond Creek

211

start 41.3541221673156

-89.6001721270724 BUREAU

end 41.3352313411595

-89.5875580793812 BUREAU

Unnamed Tributary of Prairie Creek

78

start 40.2086608970772

-89.6103029312127 MASON

end 40.2239585519289

-89.638616348402 MASON

80

start 40.3105388304102

-89.4819788351989 LOGAN

end 40.3114851545122

-89.4410508250634 LOGAN

Unnamed Tributary of Rooks Creek

387

start 40.7615433072922

-88.6752675977812 LIVINGSTON

end 40.7348742139519

-88.6985073106457 MCLEAN

Unnamed Tributary of Salt Creek

412

start 40.3090617343957

-88.6002511568763 MCLEAN

end 40.3165662374132

-88.6011454430269 MCLEAN

Unnamed Tributary of Sandy Creek

108

start 41.0816545465891

-89.0921996326175 MARSHALL

end 41.0690044849354

-89.0872784559417 MARSHALL

Unnamed Tributary of Sangamon River

414

start 40.2187198550443

-88.3726776422252 CHAMPAIGN

end 40.207759150969

-88.3556670563292 CHAMPAIGN

415

start 40.2618571248343

-88.3804307110291 CHAMPAIGN

end 40.2604569179243

-88.4076966986332 CHAMPAIGN

Unnamed Tributary of Senachwine Creek

97

start 41.0729094906046

-89.5194162172506 MARSHALL

end 41.1005615839111

-89.5247542292286 MARSHALL

98

start 41.0008160428297

-89.5071527441621 MARSHALL

end 41.0407981005047

-89.5430844273656 MARSHALL

Unnamed Tributary of Walnut Creek

130

start 41.0811500581416

-90.0632765005186 KNOX

end 41.0847653353348

-90.0680765817376 KNOX

132

start 41.0602585608831

-89.9869046205873 KNOX

---

54

end 41.0721601609241

-89.9735120056073 STARK

133

start 41.0262443553352

-89.9515238620326 STARK

end 41.0340788244836

-89.924721175772 STARK

Unnamed Tributary of West Bureau Creek

215

start 41.4606455355906

-89.5251264675481 BUREAU

---

55

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

end 41.4958522845312

-89.5472802493082 BUREAU

Unnamed Tributary of West Fork Sugar Creek

85

start 40.3381506914873

-89.2954898975603 TAZEWELL

end 40.3660114221746

-89.2448498120596 MCLEAN

86

start 40.3105145326502

-89.3291625265707 LOGAN

end 40.3299182729366

-89.3779530037535 TAZEWELL

Valley Run

241

start 41.4172036201222

-88.3955434158999 GRUNDY

end 41.5039796750174

-88.5041976708714 KENDALL

Vermilion Creek

235

start 41.4768291322914

-89.0571044195371 LASALLE

end 41.5338604103044

-89.0473804190906 LASALLE

Vermilion River

385

start 41.3202746199326

-89.067686548398 LASALLE

end 40.8817674383366

-88.6504671722722 LIVINGSTON

Walnut Creek

128

start 40.9597510841493

-89.9769499175619 PEORIA

end 41.12653217294 -90.2059192933585 KNOX

404

start 40.6253040823561

-89.239009045057 WOODFORD

end 40.7670065190601

-89.3054156233977 WOODFORD

Waubonsie Creek

273

start 41.6864691774875

-88.3543291766866 KENDALL

end 41.727653072306

-88.2817226140407 KANE

Waupecan Creek

262

start 41.3345412028515

-88.4648617458928 GRUNDY

end 41.1880870688571

-88.5889392759762 LASALLE

Welch Creek

278

start 41.7390229211455

-88.5133300234389 KANE

end 41.7542282081589

-88.4963865174814 KANE

West Branch Big Rock Creek

276

start 41.7542830239271

-88.5621632556731 KANE

end 41.791467372356

-88.6440656199133 DEKALB

West Branch Drummer Creek

424

start 40.4348513301682

-88.3934764271309 FORD

---

56

end 40.4490333768479

-88.4056995893214 FORD

West Branch Du Page River

269

start 41.7019525201778

-88.1476209409341 WILL

end 41.7799425869794

-88.1712650214772 DUPAGE

West Branch of Easterbrook Drain

411

---

57

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 40.3633709579832

-88.5816306009141 MCLEAN

end 40.3762064931712

-88.5843753634505 MCLEAN

West Branch of Horse Creek

263

start 41.2492485076225

-88.1312055809841 WILL

end 41.0019131557324

-88.1364114459172 KANKAKEE

West Branch of Lamarsh Creek

91

start 40.5615978513207

-89.6991824445749 PEORIA

end 40.640281675188

-89.7388615248892 PEORIA

West Branch Panther Creek

407

start 40.7528335084236

-89.1030067348099 WOODFORD

end 40.7954060105963

-89.1900600098668 WOODFORD

West Bureau Creek

213

start 41.3209910742583

-89.5195916727401 BUREAU

end 41.478267808168

-89.5152211006131 BUREAU

West Fork Mazon River

260

start 41.2530670781541

-88.3508667933585 GRUNDY

end 41.0302502359071

-88.5226194555857 LIVINGSTON

West Fork Salt Creek

74

start 40.317360196629

-88.7559599297755 MCLEAN

end 40.3372561693307

-88.8039670869984 MCLEAN

West Fork Sugar Creek

84

start 40.2844404292499

-89.332075650855 LOGAN

end 40.4558745105979

-89.1642930044364 MCLEAN

Wolf Creek

497

start 41.1540042913791

-88.8612912917747 LASALLE

end 41.1611802253124

-88.8310854379729 LASALLE

Kaskaskia

Bearcat Creek

37

start 39.0121682814832

-89.5317265036074 BOND

end 39.0568357269204

-89.4889786056249 MONTGOMERY

Becks Creek

45

start 39.1565938305703

-88.9491156388975 FAYETTE

end 39.3602481794208

-89.0227919838743 SHELBY

Brush Creek

39

start 39.1385354787129

-89.5805305687638 MONTGOMERY

---

58

end 39.1539913389194

-89.561368040102 MONTGOMERY

Cress Creek

41

start 39.1652709439739

-89.5012992382647 MONTGOMERY

end 39.1962551507602

-89.5131844155481 MONTGOMERY

Dry Fork

---

59

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

43

start 39.036113738887

-89.2488135289512 FAYETTE

end 39.1033131262537

-89.2984242244004 MONTGOMERY

East Fork Shoal Creek

23

start 38.8310032253066

-89.4990300331039 BOND

end 38.9226451880864

-89.4117554251748 BOND

Gerhardt Creek

27

start 38.3445550793694

-90.0600653224456 ST. CLAIR

end 38.367857922464

-90.0997565611344 MONROE

Hurricane Creek

42

start 38.9180334233238

-89.2472989134191 FAYETTE

end 39.2167946546678

-89.2767284135051 MONTGOMERY

Loop Creek

21

start 38.4738791704891

-89.8286629587977 ST. CLAIR

end 38.4996759642082

-89.9058988238884 ST. CLAIR

Middle Fork Shoal Creek

40

start 39.0848984732588

-89.5438724131899 MONTGOMERY

end 39.1868483992515

-89.4798528829252 MONTGOMERY

Mitchell Creek

48

start 39.1565938305703

-88.9491156388975 FAYETTE

end 39.3191569074355

-88.9291931738519 SHELBY

Mud Creek

51

start 39.4078984061571

-88.8964126852371 SHELBY

end 39.4786612118046

-88.9523280946578 SHELBY

Ninemile Creek

30

start 38.0441291788376

-89.9112042263573 RANDOLPH

end 38.0507383485977

-89.8278402421236 RANDOLPH

Opossum Creek

46

start 39.2718719283603

-89.006345202583 SHELBY

end 39.2833737967471

-89.0555186821259 SHELBY

Prairie du Long Creek

24

start 38.2583950460692

-89.9674114204896 MONROE

end 38.3425597902873

-90.0517323138269 ST. CLAIR

Robinson Creek

50

start 39.3519556417502

-88.8434641389225 SHELBY

---

60

end 39.5215530679793

-88.8331635597113 SHELBY

Rockhouse Creek

25

start 38.279441694169

-90.0367398173562 MONROE

end 38.2999005789932

-90.1039357731424 MONROE

Section Creek

49

---

61

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 39.1835497280833

-88.9455894742885 FAYETTE

end 39.1959160048126

-88.961892707007 FAYETTE

Shoal Creek

22

start 38.4831106563982

-89.5775456200079 WASHINGTON

end 38.5557239981111

-89.4968640710432 CLINTON

36

start 38.8310032008922

-89.4990300493802 BOND

end 39.0848755752581

-89.5439018081354 MONTGOMERY

Silver Creek

20

start 38.3369025707936

-89.8753691916515 ST. CLAIR

end 38.5568068204478

-89.8305698867169 ST. CLAIR

Stringtown Branch

53

start 39.7138824796477

-88.6677549810426 MOULTRIE

end 39.7363136714592

-88.6944718913546 MOULTRIE

Unnamed Tributary of Gerhardt Creek

26

start 38.367857922464

-90.0997565611344 MONROE

end 38.3742880966457

-90.1107074126403 MONROE

Unnamed Tributary of Okaw River

54

start 39.734248747064

-88.6620801587617 MOULTRIE

end 39.80990395294 -88.6969360645412 PIATT

Walters Creek

28

start 38.3425597902873

-90.0517323138269 ST. CLAIR

end 38.3445550793694

-90.0600653224456 ST. CLAIR

West Fork Shoal Creek

38

start 39.1385354787129

-89.5805305687638 MONTGOMERY

end 39.1877434015581

-89.6041666305308 MONTGOMERY

West Okaw River

52

start 39.6158126349278

-88.7105522558061 MOULTRIE

end 39.7564321977535

-88.630211952428 MOULTRIE

Mississippi River

Apple River

372

start 42.3210892387922

-90.2520915343109 JO DAVIESS

end 42.5078007598632

-90.1320538371008 JO DAVIESS

Bear Creek

199

start 40.1421908412793

-91.322057103417 ADAMS

end 40.3507607406412

-91.1831593883194 HANCOCK

---

62

Bigneck Creek

205

start 40.1189668648562

-91.2247381726013 ADAMS

end 40.118891177483

-91.1409739765636 ADAMS

Burton Creek

192

---

63

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 39.8643091712617

-91.343323220756 ADAMS

end 39.92393403238 -91.2381482737218 ADAMS

Camp Creek

140

start 41.2607621817314

-90.514303172809 MERCER

end 41.3114464274682

-90.2476056448033 HENRY

142

start 41.2202380211465

-90.895164796358 MERCER

end 41.2787933006746

-90.6950345992843 MERCER

Carroll Creek

349

start 42.1027782814517

-90.0265311556732 CARROLL

end 42.0906369943302

-89.8985337135691 CARROLL

Clear Creek

6

start 37.4821139304798

-89.377768200259 UNION

end 37.5377402977406

-89.331689550578 UNION

381

start 42.4468385101031

-90.0472460146999 JO DAVIESS

end 42.4780763391708

-90.035127804618 JO DAVIESS

Coon Creek

376

start 42.4035528739642

-90.1272819897867 JO DAVIESS

end 42.4347098804951

-90.1169407822902 JO DAVIESS

Copperas Creek

148

start 41.3717279574558

-90.901871458269 ROCK ISLAND

end 41.3616090539824

-90.7468725613692 ROCK ISLAND

Deep Run

155

start 40.7779166934519

-90.9639489255706 HENDERSON

end 40.794076798068

-90.9474772904134 HENDERSON

Dixson Creek

154

start 40.7684181600505

-90.9376123103323 HENDERSON

end 40.7650613473293

-90.9262679175808 HENDERSON

Dutch Creek

4

start 37.4593003249666

-89.3688365937935 UNION

end 37.4147572383786

-89.2744790735331 UNION

East Fork Galena River

383

start 42.450241615252

-90.3876497193745 JO DAVIESS

end 42.4876693698893

-90.286894403861 JO DAVIESS

Edwards River

145

---

64

start 41.1459068953479

-90.9832855425151 MERCER

end 41.2835429634312

-90.1022166001482 HENRY

Eliza Creek

146

start 41.2754465656779

-90.9740195834639 MERCER

end 41.2948140261561

-90.8870757880317 MERCER

Ellison Creek

---

65

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

153

start 40.7615810139869

-91.0723400800456 HENDERSON

end 40.7295594797542

-90.7480413061409 WARREN

Galena River

382

start 42.450241615252

-90.3876497193745 JO DAVIESS

end 42.5068721036534

-90.390459616835 JO DAVIESS

Green Creek

5

start 37.4514943718452

-89.3379244013686 UNION

end 37.4666314694209

-89.3048476846202 UNION

Hadley Creek

188

start 39.7025380326419

-91.1396851101986 PIKE

end 39.7351716794518

-90.9664567571417 PIKE

Hells Branch

378

start 42.3582317355027

-90.185076448587 JO DAVIESS

end 42.4166702490621

-90.1660286242329 JO DAVIESS

Henderson Creek

134

start 41.0518601460692

-90.652709618504 WARREN

end 41.0728998007979

-90.3331881878676 KNOX

150

start 40.8788582366336

-90.9641994146698 HENDERSON

end 40.989888583038

-90.8698875032336 HENDERSON

Hillery Creek

144

start 41.2699394405307

-90.2020116075301 HENRY

end 41.2553101029329

-90.1954503442612 HENRY

Honey Creek

157

start 40.7000823335975

-91.0347691132118 HENDERSON

end 40.7064734203141

-90.8589436695132 HENDERSON

186

start 39.4871465283426

-90.7799240715991 PIKE

end 39.5633421986505

-90.8011460205638 PIKE

207

start 40.1052246871151

-91.2149469620062 ADAMS

end 40.0689996865178

-91.2253825583113 ADAMS

Hutchins Creek

7

start 37.5043385818368

-89.3755380391598 UNION

end 37.58788138261 -89.3917584202331 UNION

Little Bear Creek

194

---

66

start 40.3213003292038

-91.2390256840921 HANCOCK

end 40.302753021887

-91.3102530307924 HANCOCK

Little Creek

200

start 40.1807360433073

-91.2803860136891 ADAMS

end 40.230127123031

-91.3051461065984 HANCOCK

McCraney Creek

---

67

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

189

start 39.7167396162723

-91.1729844320811 PIKE

end 39.8572624790589

-91.0907175471865 ADAMS

Mill Creek

191

start 39.8643091712617

-91.343323220756 ADAMS

end 39.9675786362521

-91.2477003180771 ADAMS

377

start 42.3539782358808

-90.1879698650198 JO DAVIESS

end 42.4518923573772

-90.2485882677025 JO DAVIESS

496

start 38.9472270910927

-90.2956721236088 JERSEY

end 38.9871246152411

-90.3431576290565 JERSEY

Mississippi River

2

end 37.1887629940337

-89.4576720472899 ALEXANDER

29

start 38.8664117755941

-90.1477786925267 MADISON

end 38.327795025976

-90.3709302644266 MONROE

384

start 42.5079432477656

-90.6430378486115 JO DAVIESS

end 41.5746193723759

-90.392321397091 ROCK ISLAND

440

start 39.326689248302

-90.8243988873681 CALHOUN

end 39.8935238218567

-91.4437639810547 ADAMS

Mud Creek

202

start 40.1812148450863

-91.2785060826782 ADAMS

end 40.1852755387137

-91.2660018265735 ADAMS

Nichols Run

156

start 40.7735451176215

-90.9672827833242 HENDERSON

end 40.7648298879037

-90.9675416302885 HENDERSON

North Henderson Creek

136

start 41.0973619647032

-90.7191141378965 MERCER

end 41.119743833988

-90.4494190524502 MERCER

Parker Run

141

start 41.2623500459087

-90.4891341819923 MERCER

end 41.2260011828886

-90.4145431241447 HENRY

Pigeon Creek

190

start 39.7143204171354

-91.2372670411405 PIKE

end 39.8220301600964

-91.2087922935523 ADAMS

Pope Creek

---

68

137

start 41.1401437091914

-90.8116816399802 MERCER

end 41.1394137238591

-90.2877112230995 KNOX

Sixmile Creek

187

start 39.4592604039597

-90.8902507134236 PIKE

end 39.5431657559583

-90.8891598316201 PIKE

---

69

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

Slater Creek

198

start 40.291601584329

-91.2423526162923 HANCOCK

end 40.2822885732908

-91.2189777154329 HANCOCK

Smith Creek

152

start 40.9297989285848

-90.9146232873076 HENDERSON

end 40.9291958384872

-90.7919464822621 HENDERSON

South Edwards River

139

start 41.2656645104853

-90.2611866223557 HENRY

end 41.1927071399434

-90.0393078982573 HENRY

South Fork Apple River

380

start 42.4468385101031

-90.0472460146999 JO DAVIESS

end 42.4176188464167

-89.9845802036023 JO DAVIESS

South Fork Bear Creek

203

start 40.1677973436879

-91.2933473698779 ADAMS

end 40.0950329934447

-91.0607522810856 ADAMS

South Henderson Creek

135

start 41.0188478643653

-90.4811337762604 WARREN

end 41.0121123609019

-90.4338464913801 KNOX

151

start 40.8788582366336

-90.9641994146698 HENDERSON

end 40.8534764362853

-90.8707263659685 HENDERSON

Straddle Creek

301

start 42.0906369943302

-89.8985337135691 CARROLL

end 42.1316680929413

-89.783599495409 CARROLL

Thurman Creek

204

start 40.1277667094818

-91.234525810555 ADAMS

end 40.1580795200863

-91.1501036788115 ADAMS

Tournear Creek

193

start 39.9042285951329

-91.2447718289928 ADAMS

end 39.8738503674823

-91.1658282439773 ADAMS

Unnamed Tributary of Apple River

375

start 42.3613497834653

-90.1603277978963 JO DAVIESS

end 42.3651703478401

-90.1182227692179 JO DAVIESS

Unnamed Tributary of Bear Creek

197

start 40.3187160045841

-91.2379753573306 HANCOCK

---

70

end 40.3220475782343

-91.2218711128768 HANCOCK

201

start 40.2483484763178

-91.2634157983708 HANCOCK

end 40.2576281291385

-91.2420554576986 HANCOCK

Unnamed Tributary of Copperas Creek

149

start 41.3759130587612

-90.8569366994939 ROCK ISLAND

---

71

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

end 41.3735944469795

-90.829794872711 ROCK ISLAND

Unnamed Tributary of Furnace Creek

373

start 42.3419228115146

-90.2583358633166 JO DAVIESS

end 42.3737126096251

-90.2971522307335 JO DAVIESS

374

start 42.3419228115146

-90.2583358633166 JO DAVIESS

end 42.3615209718591

-90.24931703774 JO DAVIESS

Unnamed Tributary of South Edwards River

143

start 41.2011516193172

-90.1850818577344 HENRY

end 41.1943841818099

-90.1839265246101 HENRY

Unnamed Tributary of South Fork of Bear Creek

206

start 40.0797919556019

-91.1461193615862 ADAMS

end 40.0587441356106

-91.1467388825794 ADAMS

West Fork of Apple River

379

start 42.4777531846594

-90.1103501186504 JO DAVIESS

end 42.4739843218597

-90.1321517307332 JO DAVIESS

West Fork of Bear Creek

195

start 40.3385207135212

-91.2203393068898 HANCOCK

end 40.3592824400704

-91.2334357995319 HANCOCK

Yankee Branch

147

start 41.2850778212191

-90.9379823025264 MERCER

end 41.2926277702981

-90.9335620769218 MERCER

Ohio

Big Creek

16

start 37.4366764302436

-88.3127424957005 HARDIN

end 37.5591274535694

-88.3148730216063 HARDIN

Big Grand Pierre Creek

13

start 37.4163002207384

-88.4338876873615 POPE

end 37.5702304746463

-88.4292613661871 POPE

Hayes Creek

10

start 37.4452331751972

-88.7114120959417 JOHNSON

end 37.4559134065693

-88.6286228702431 POPE

Hicks Branch

14

start 37.5432903813926

-88.4245265989312 POPE

end 37.5391971894773

-88.4135144509885 HARDIN

Little Lusk Creek

---

72

12

start 37.4991426291527

-88.5277357332102 POPE

end 37.5247950767618

-88.5017934865946 POPE

Little Saline River

9

start 37.6429893859023

-88.6229273282692 SALINE

---

73

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

end 37.5783125058777

-88.7169929932876 JOHNSON

Lusk Creek

11

start 37.3685952948804

-88.4926140087969 POPE

end 37.5649232438096

-88.5644984122843 POPE

Mississippi River

2

start 36.9810279805712

-89.1311552055554 ALEXANDER

Ohio River

1

start 36.9810279805712

-89.1311552055554 ALEXANDER

end 37.7995447392016

-88.0255709974801 GALLATIN

Simmons Creek

15

start 37.4274681380208

-88.4392381154217 POPE

end 37.4644921054999

-88.4850750109356 POPE

South Fork Saline River

8

start 37.6372646144582

-88.6447143188352 SALINE

end 37.6650992000287

-88.7471054185807 WILLIAMSON

Unnamed Tributary of Big Creek

18

start 37.4816237108967

-88.3412279259479 HARDIN

end 37.4836843600581

-88.3434390004066 HARDIN

Wabash River

488

start 37.7995447392016

-88.0255709974801 GALLATIN

Rock

Beach Creek

302

start 41.8989215290323

-89.121081932608 OGLE

end 41.8637759544565

-89.185844184387 LEE

Beaver Creek

322

start 42.2551087433884

-88.9247700103803 BOONE

end 42.4341346635117

-88.7603784300954 BOONE

Black Walnut Creek

341

start 42.1132080942552

-89.2141520188153 OGLE

end 42.061557908797

-89.2316600156935 OGLE

Brown Creek

335

start 42.3568412672282

-89.4493817584574 STEPHENSON

end 42.3697340053709

-89.4802304815634 STEPHENSON

Buffalo Creek

358

---

74

start 41.9242552302868

-89.6809355972221 WHITESIDE

end 41.9752373833258

-89.6243677263482 OGLE

Cedar Creek

337

start 42.3709196286357

-89.670256711355 STEPHENSON

end 42.3896058186609

-89.5870343171161 STEPHENSON

---

75

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

Coal Creek

208

start 41.3941767873198

-89.8287586795479 BUREAU

end 41.2930847238959

-89.6659810678663 BUREAU

Coon Creek

304

start 42.0365871032824

-89.489365571257 OGLE

end 42.0550520228278

-89.4762995939105 OGLE

326

start 42.254519734978

-88.7945563884938 BOONE

end 42.1336677087989

-88.6039205825106 DEKALB

Crane Grove Creek

371

start 42.2656461748962

-89.6058461735176 STEPHENSON

end 42.2317224844045

-89.5804359629382 STEPHENSON

Deer Creek

307

start 42.1046195671697

-88.7267155451459 DEKALB

end 42.1076541965304

-88.6684575625598 DEKALB

Dry Creek

332

start 42.4322162336943

-89.0509181181504 WINNEBAGO

end 42.4892211712754

-88.9789486331688 WINNEBAGO

East Branch South Branch of Kishwaukee River

306

start 42.0108038948242

-88.7236807475971 DEKALB

end 41.9822037358546

-88.5449399063616 KANE

East Fork Mill Creek

343

start 42.1402053009442

-89.2945061380348 OGLE

end 42.1744627607887

-89.268245093523 OGLE

Elkhorn Creek

350

start 41.8392614813286

-89.6956810578758 WHITESIDE

end 42.0864514128748

-89.636841111792 OGLE

Franklin Creek

303

start 41.8885909580789

-89.4120344682789 OGLE

end 41.830393186845

-89.3092915487959 LEE

Goose Creek

356

start 41.9282951879448

-89.692114617634 WHITESIDE

end 41.9476422569681

-89.6849104470831 OGLE

Green River

359

start 41.6266589513433

-89.5688644755145 LEE

---

76

end 41.8177589430141

-89.1263088319088 LEE

Kilbuck Creek

312

start 42.1838622639314

-89.1301689015062 WINNEBAGO

end 41.9181917577798

-88.9212387567239 DEKALB

Kingsbury Creek

311

---

77

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 42.1077794424363

-88.8726630666396 DEKALB

end 42.1579325310556

-88.8548684690422 BOONE

Kishwaukee River

318

start 42.1866384939252

-89.1320796977525 WINNEBAGO

end 42.2666635150817

-88.5250450377336 MCHENRY

Kyte River

295

start 41.9881250432719

-89.3232327202272 OGLE

end 41.9206998470585

-89.0576692414087 OGLE

Leaf River

345

start 42.093677393629

-89.3249228482157 OGLE

end 42.1545774626081

-89.5725820219443 OGLE

Lost Creek

368

start 42.245723132043

-89.7807765552299 STEPHENSON

end 42.2314500223394

-89.7709518073782 STEPHENSON

Middle Creek

344

start 42.1559584011258

-89.2911997709031 OGLE

end 42.1737499306461

-89.2931763612625 OGLE

Mill Creek

342

start 42.1206847838382

-89.2792143996076 OGLE

end 42.2092574596508

-89.3358557551327 WINNEBAGO

Mosquito Creek

323

start 42.3066628798583

-88.9047855300292 BOONE

end 42.3100003482313

-88.9099328193755 BOONE

327

start 42.246521748985

-88.7802719043895 BOONE

end 42.1906300595167

-88.7849304281662 BOONE

Mud Creek

325

start 42.2592878387497

-88.7503449689069 BOONE

end 42.2805097009077

-88.7381130663589 BOONE

346

start 42.1301628959448

-89.4043328758949 OGLE

end 42.1639762007661

-89.4554911246235 OGLE

North Branch Kishwaukee River

320

start 42.2655855837644

-88.5514660318739 MCHENRY

end 42.4163330454161

-88.5232715616737 MCHENRY

North Branch Otter Creek

292

---

78

start 42.4412940471901

-89.3074016078782 WINNEBAGO

end 42.4570625094589

-89.356265092275 WINNEBAGO

North Fork Kent Creek

333

start 42.2621663352674

-89.0944316410734 WINNEBAGO

end 42.310438304708

-89.1651357273603 WINNEBAGO

Otter Creek

---

79

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

291

start 42.4565457866811

-89.2410171137247 WINNEBAGO

end 42.4412940471901

-89.3074016078782 WINNEBAGO

348

start 42.1345277930786

-89.411492883497 OGLE

end 42.1911608097275

-89.4222625773931 OGLE

Owens Creek

310

start 42.1012605056104

-88.8850996053184 DEKALB

end 41.994362186304

-88.8506687869106 DEKALB

Pine Creek

305

start 41.9113031895505

-89.452879176459 OGLE

end 42.0376146514025

-89.4909007464322 OGLE

Piscasaw Creek

324

start 42.2618063936707

-88.8176068924198 BOONE

end 42.3916885547221

-88.7041339551642 MCHENRY

Raccoon Creek

328

start 42.4479288873423

-89.098286193015 WINNEBAGO

end 42.4829761640917

-89.1400856130022 WINNEBAGO

Reid Creek

353

start 41.8644109921615

-89.5919014348703 LEE

end 41.9135187969506

-89.5728723309406 OGLE

Richland Creek

336

start 42.3456275295301

-89.6832413426115 STEPHENSON

end 42.5047442687577

-89.6477619118761 STEPHENSON

Rock River

294

start 41.9881250432719

-89.3232327202272 OGLE

end 42.4962174640048

-89.0418910839077 WINNEBAGO

Rock Run

490

start 42.3211872463585

-89.4237342452712 STEPHENSON

end 42.4281098959774

-89.4483616268915 STEPHENSON

Rush Creek

321

start 42.2560676137827

-88.7031592940742 MCHENRY

end 42.4031741332744

-88.5930626223964 MCHENRY

Silver Creek

338

start 42.0611717976691

-89.335901928201 OGLE

end 42.0866765435436

-89.3839889015445 OGLE

---

80

Skunk Creek

354

start 41.8794703976699

-89.7072621672884 WHITESIDE

end 41.897582187238

-89.7290746844729 WHITESIDE

South Branch Kishwaukee River

308

start 42.2001609257306

-88.9840657029051 WINNEBAGO

---

81

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

end 41.9015798699947

-88.7706697182685 DEKALB

315

start 42.2627093767756

-88.5609522875415 MCHENRY

end 42.1066209842679

-88.4620443477841 KANE

South Branch of Otter Creek

280

start 42.4412940471901

-89.3074016078782 WINNEBAGO

end 42.4343122756071

-89.3600650183381 WINNEBAGO

South Fork of Leaf River

347

start 42.1296104494647

-89.4546456401589 OGLE

end 42.1085718337046

-89.5037134270228 OGLE

South Kinnikinnick Creek

330

start 42.419961259532

-89.018119476068 WINNEBAGO

end 42.4190921988888

-88.8710507717794 BOONE

Spring Creek

339

start 42.0709215390383

-89.325546679708 OGLE

end 42.0590157098796

-89.3110803788049 OGLE

Spring Run

313

start 42.0402370001041

-89.0065478421579 OGLE

end 42.0507770466662

-88.9858854279893 OGLE

Steward Creek

297

start 41.8903673258897

-89.1021064698423 OGLE

end 41.8259979751563

-88.9624738458404 LEE

Stillman Creek

340

start 42.1259475370515

-89.2319193482332 OGLE

end 42.0372051268587

-89.1542573242497 OGLE

Sugar Creek

352

start 41.8392614813286

-89.6956810578758 WHITESIDE

end 41.8644109921615

-89.5919014348703 LEE

Sugar River

293

start 42.4357992567436

-89.1971727593158 WINNEBAGO

end 42.4982890047043

-89.2624235677856 WINNEBAGO

Sumner Creek

334

start 42.3227762010459

-89.3830042631004 WINNEBAGO

end 42.25195988987 -89.3997975146614 STEPHENSON

Turtle Creek

329

---

82

start 42.4929910323531

-89.0439958173493 WINNEBAGO

end 42.4961371053418

-89.0246519221989 WINNEBAGO

Unnamed Tributary

361

start 41.6608316904842

-89.4728200038511 LEE

end 41.6425311558513

-89.4137140926471 LEE

365

---

83

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 41.7443681625006

-89.168951821186 LEE

end 41.738182745458

-89.1042187039322 LEE

492

start 42.1246069284208

-88.5882544654343 DEKALB

end 42.1028295788327

-88.5105326912596 KANE

Unnamed Tributary of Buffalo Creek

357

start 41.9332348110612

-89.6342816030603 OGLE

end 41.93890647032 -89.6092042883405 OGLE

Unnamed Tributary of Coon Creek

282

start 42.1336677087989

-88.6039205825106 DEKALB

end 42.0754334787177

-88.5442273447775 KANE

491

start 42.150113155436

-88.6091713292612 DEKALB

end 42.1691790844289

-88.5070973943593 MCHENRY

Unnamed Tributary of Elkhorn Creek

355

start 41.9378871254405

-89.7318712136894 CARROLL

end 41.9525180771018

-89.7332762139612 CARROLL

Unnamed Tributary of Green River

360

start 41.8177589430141

-89.1263088319088 LEE

end 41.8012094828667

-89.0296681468724 LEE

362

start 41.66455888603 -89.4729486542104 LEE

end 41.650155479351

-89.4398464027055 LEE

364

start 41.750735979575

-89.2189268880904 LEE

end 41.7278383993539

-89.1577958588247 LEE

366

start 41.7304138832457

-89.2547363744761 LEE

end 41.7421804770435

-89.2683034846455 LEE

367

start 41.7336722733557

-89.2459381167869 LEE

end 41.6996843512729

-89.2025409068097 LEE

489

start 41.7765356433433

-89.1781811586274 LEE

end 41.791148742648

-89.1782543204659 LEE

Unnamed Tributary of Kyte River

298

start 41.969037423435

-89.2727932207785 OGLE

end 41.9423468128644

-89.2676252361535 OGLE

299

start 41.9474122868214

-89.1742920304606 OGLE

end 41.9511979792854

-89.1378721025283 OGLE

---

84

Unnamed Tributary of North Branch

Kishwaukee River

319

start 42.4163330454161

-88.5232715616737 MCHENRY

end 42.4218523642031

-88.5063783493938 MCHENRY

Unnamed Tributary of Rock River

331

start 42.3730089457359

-89.0581319432428 WINNEBAGO

---

85

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

end 42.382841503485

-89.0950184603254 WINNEBAGO

Unnamed Tributary of South Branch Kishwaukee River

309

start 42.1219922946716

-88.9236557341498 DEKALB

end 42.1138208388943

-88.9372243118963 DEKALB

316

start 42.1565644453666

-88.4449935784875 MCHENRY

end 42.1594149792506

-88.4178533576301 MCHENRY

317

start 42.234010247227

-88.5199093723576 MCHENRY

end 42.2225793216803

-88.5259266256801 MCHENRY

Unnamed Tributary of Spring Run

314

start 42.0401565844742

-88.9948863767949 OGLE

end 42.0116835703089

-88.9710672286801 OGLE

Unnamed Tributary of Steward Creek

296

start 41.8444592840822

-89.0070046248547 LEE

end 41.8601589546913

-88.9714244440014 LEE

300

start 41.871719116543

-89.069434926448 LEE

end 41.8792477545579

-89.037635229652 LEE

Unnamed Tributary of Yellow Creek

369

start 42.3067615221991

-89.8535571166391 STEPHENSON

end 42.3493669268537

-89.8275355259147 STEPHENSON

West Fork Elkhorn Creek

351

start 42.0864514128748

-89.636841111792 OGLE

end 42.0924853439498

-89.6474944357754 OGLE

Willow Creek

363

start 41.7653209616214

-89.1943294683724 LEE

end 41.7141851660088

-89.032161004274 LEE

Yellow Creek

370

start 42.2899156684427

-89.5696276563017 STEPHENSON

end 42.3796215769162

-89.9350879560031 JO DAVIESS

Wabash

Bean Creek

437

start 40.2950579779894

-87.7823902126108 VERMILION

end 40.3344744135429

-87.7494458762005 VERMILION

Big Creek

457

start 39.3351439545995

-87.5878012286214 CLARK

---

86

start 39.436126036547

-87.7023848396263 CLARK

Bluegrass Creek

436

start 40.301292752824

-87.7969361668719 VERMILION

end 40.381268589802

-87.8562389558508 VERMILION

Brouilletts Creek

---

87

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

450

start 39.7057649552945

-87.5509615193818 EDGAR

end 39.797449971524

-87.7178559181463 EDGAR

Brush Creek

468

start 38.993072718826

-88.1273817532169 JASPER

end 38.9675510537677

-88.1471375817992 JASPER

Brushy Fork

484

start 39.7161188745587

-88.0853294840712 DOUGLAS

end 39.8111289403664

-87.8839288887749 EDGAR

Buck Creek

435

start 40.3115126234324

-87.9255710854089 VERMILION

end 40.2862675329103

-87.9704593374522 CHAMPAIGN

Cassell Creek

473

start 39.4866434423672

-88.2094970436354 COLES

end 39.4909698054293

-88.207848854172 COLES

Catfish Creek

477

start 39.680891264864

-87.9341744320393 EDGAR

end 39.6581354970801

-87.8937116601235 EDGAR

Clark Branch

483

start 39.8111289403664

-87.8839288887749 EDGAR

end 39.8226610039489

-87.8513747624001 EDGAR

Collison Branch

439

start 40.2351860050982

-87.7725365689525 VERMILION

end 40.2197161120333

-87.803155121171 VERMILION

Cottonwood Creek

469

start 39.2033657707304

-88.2765033266093 CUMBERLAND

end 39.3142137713574

-88.229342077034 CUMBERLAND

Crabapple Creek

452

start 39.7057649552945

-87.5509615193818 EDGAR

end 39.8065708276187

-87.6467768455628 EDGAR

Crooked Creek

465

start 38.9817031629594

-88.066438923761 JASPER

end 39.0356467346919

-88.0923368283887 JASPER

Deer Creek

485

start 39.7053403128076

-88.0850387247647 DOUGLAS

---

88

end 39.7025679945443

-88.2058470030399 DOUGLAS

Donica Creek

479

start 39.6453315324326

-87.9892294370803 COLES

end 39.6172623271272

-87.9782640861296 COLES

Dudley Branch

475

---

89

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 39.5115642227627

-88.0564563693231 COLES

end 39.5068188298145

-88.043669581567 COLES

East Crooked Creek

287

start 39.0356467346919

-88.0923368283887 JASPER

end 39.1659729856615

-88.0610310241876 JASPER

East Fork Big Creek

458

start 39.436126036547

-87.7023848396263 CLARK

end 39.5471103780713

-87.760040304497 EDGAR

Embarras River

460

start 38.9148628762488

-87.9834798036322 JASPER

end 39.7161188745587

-88.0853294840712 DOUGLAS

Feather Creek

432

start 40.1172818042134

-87.8342855159987 VERMILION

end 40.1416543211304

-87.8399367268356 VERMILION

Greasy Creek

480

start 39.6325904592965

-88.0822649850404 COLES

end 39.6182255297223

-88.1320998047424 COLES

Hickory Creek

464

start 38.9714278418083

-87.972721454297 JASPER

end 38.99191464315 -87.989292523907

JASPER

Hickory Grove Creek

478

start 39.6581354970801

-87.8937116601235 EDGAR

end 39.5712873627184

-87.8825676201308 EDGAR

Hurricane Creek

470

start 39.2889007816578

-88.1544749600653 CUMBERLAND

end 39.3793118297358

-88.0668208708762 COLES

Jordan Creek

433

start 40.0794151192358

-87.7990673709556 VERMILION

end 40.0588834821927

-87.8360461636444 VERMILION

443

start 40.3360527696651

-87.6231745570584 VERMILION

end 40.3553265493525

-87.5278198412106 VERMILION

Kickapoo Creek

471

start 39.4379695819539

-88.1681483569976 COLES

end 39.4597583113682

-88.2917593820249 COLES

Knights Branch

---

90

438

start 40.2763499940372

-87.7961879249888 VERMILION

end 40.2520446574291

-87.8336356533235 VERMILION

Little Embarras River

476

start 39.5736361588448

-88.0726889440362 COLES

end 39.680891264864

-87.9341744320393 EDGAR

---

91

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

Little Vermilion River

426

start 39.9463345271443

-87.5536756201362 VERMILION

end 39.9593741043792

-87.6447473681732 VERMILION

Middle Branch

442

start 40.3096675860339

-87.6376716065503 VERMILION

end 40.417753327133

-87.5275419211693 VERMILION

Middle Fork of Vermilion River

428

start 40.1035656386662

-87.7169902321166 VERMILION

end 40.4043343147541

-88.0191381621282 FORD

Mill Creek

487

start 39.2394256838229

-87.6762126527038 CLARK

end 39.3566749194214

-87.7425049309309 CLARK

Muddy Creek

242

start 39.1821395682335

-88.2309155529877 CUMBERLAND

end 39.2033657707304

-88.2765033266093 CUMBERLAND

North Fork of Embarras River

461

start 38.9148628762488

-87.9834798036322 JASPER

end 39.0924749553725

-87.9784039128617 JASPER

North Fork Vermilion River

441

start 40.236054881277

-87.6293326109766 VERMILION

end 40.5010729612407

-87.5261721834388 IROQUOIS

Panther Creek

462

start 39.0924749553725

-87.9784039128617 JASPER

end 39.184289386946

-88.0087906828419 CUMBERLAND

Polecat Creek

474

start 39.5013303165832

-88.1055006912296 COLES

end 39.5162859310237

-88.0338496162262 COLES

Riley Creek

472

start 39.4712869216685

-88.2108945161318 COLES

end 39.5116227820733

-88.2569469311765 COLES

Salt Fork

429

start 40.1035656386662

-87.7169902321166 VERMILION

end 40.0368232483006

-88.0746580039075 CHAMPAIGN

455

start 39.7425080214619

-87.572919448772 EDGAR

---

92

end 39.8018493662144

-87.5775868051385 EDGAR

Snake Creek

454

start 39.7128111863363

-87.6415954465778 EDGAR

end 39.7066978623237

-87.6543043306751 EDGAR

South Fork of Brouilletts Creek

453

---

93

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

start 39.7256495590209

-87.6437626049444 EDGAR

end 39.7319449005729

-87.6951881181821 EDGAR

Stony Creek

431

start 40.0943454186494

-87.8170769835194 VERMILION

end 40.1548847864725

-87.8840063394108 VERMILION

Sugar Creek

456

start 39.4838820536199

-87.5320762217325 EDGAR

end 39.6298164781408

-87.6762882912482 EDGAR

Unnamed Tributary of Big Creek

459

start 39.5047911835054

-87.7121475341945 EDGAR

end 39.5692784693864

-87.7194139533441 EDGAR

Unnamed Tributary of Brouilletts Creek

451

start 39.797449971524

-87.7178559181463 EDGAR

end 39.831592697221

-87.7758036967074 EDGAR

Unnamed Tributary of Brushy Fork

482

start 39.7340344129883

-88.0771406153965 DOUGLAS

end 39.802586616189

-88.0753634663247 DOUGLAS

Unnamed Tributary of Deer Creek

486

start 39.7102184848625

-88.1385435180688 DOUGLAS

end 39.678866903649

-88.1425332064637 DOUGLAS

Unnamed Tributary of Embarras River

467

start 38.9934159067144

-88.129258689394 JASPER

end 39.0034725453128

-88.1210073578163 JASPER

Unnamed Tributary of Greasy Creek

481

start 39.6182255297223

-88.1320998047424 COLES

end 39.621059195964

-88.1538483534688 COLES

Unnamed Tributary of Hickory Creek

210

start 38.99191464315 -87.989292523907

JASPER

end 39.0117394234421

-87.9896104862878 JASPER

Unnamed Tributary of Middle Fork of Vermilion River

434

start 40.3478602982847

-87.9479087836067 CHAMPAIGN

end 40.3408935605508

-87.9885982351498 CHAMPAIGN

Unnamed Tributary of Stony Creek

430

start 40.1548847864725

-87.8840063394108 VERMILION

end 40.1706704853124

-87.9033972187304 VERMILION

---

94

Unnamed Tributary of North Fork of the

Vermilion River

444

start 40.3553498759616

-87.6852979017427 VERMILION

end 40.3665727663496

-87.733231992072 VERMILION

445

start 40.483638183168

-87.5751075709757 VERMILION

end 40.4930209841439

-87.5771391859822 IROQUOIS

---

95

BASIN NAME

Segment Name

Segment No.

End Points

Latitude

Longitude

COUNTY

446

start 40.423223711311

-87.6788932053507 VERMILION

end 40.4280461995299

-87.6895565256772 VERMILION

Vermilion River

427

start 40.0116868805566

-87.5337540394346 VERMILION

end 40.1035656386662

-87.7169902321166 VERMILION

Wabash River

488

end 39.3034266238732

-87.605592332246 CLARK

West Crooked Creek

466

start 39.0356467346919

-88.0923368283887 JASPER

end 39.0545759701349

-88.1009871944535 JASPER

West Fork Big Creek

19

start 39.436126036547

-87.7023848396263 CLARK

end 39.5012337820195

-87.8003199656505 EDGAR

Willow Creek

463

start 39.0191952007294

-87.9402449982878 CRAWFORD

end 39.0529145507759

-87.9280073176635 CRAWFORD

(Source: Added at 32 Ill. Reg. ____________, effective _______________)

IT IS SO ORDERED.

Section 41(a) of the Environmental Protection Act provides that final Board orders may be appealed

directly to the Illinois Appellate Court within 35 days after the Board serves the order. 415 ILCS 5/41(a)

(2006);

see also

35 Ill. Adm. Code 101.300(d)(2), 101.906, 102.706. Illinois Supreme Court Rule 335

establishes filing requirements that apply when the Illinois Appellate Court, by statute, directly reviews

administrative orders. 172 Ill. 2d R. 335. The Board’s procedural rules provide that motions for the Board to

reconsider or modify its final orders may be filed with the Board within 35 days after the order is received. 35

Ill. Adm. Code 101.520;

see also

35 Ill. Adm. Code 101.902, 102.700, 102.702.

I, John Therriault, Assistant Clerk of the Illinois Pollution Control Board, certify that the Board adopted

the above opinion and order on January 24, 2008, by a vote of 4-0.

___________________________________

John Therriault, Assistant Clerk

Illinois Pollution Control Board

---

96

APPENDIX I TO THE OPINION AND ORDER

R04-25

HEARING EXHIBITS

First Hearing: June 29, 2004, Chicago

Exhibit 1: “An Assessment of National and Illinois Dissolved Oxygen Water Quality Criteria”

James E. Garvey and Matt R. Whiles (Apr. 2004)

Exhibit 2: “Ambient Water Quality Criteria for Dissolved Oxygen” USEPA (Apr. 1986)

Exhibit 3: Resume of Dennis Streicher

Exhibit 4

: Copies of letters from Dennis Streicher to various organizations concerning the

proposed rulemaking

Exhibit 5

: Resume of James E. Garvey

Exhibit 6: Resume of Matt R. Whiles

Exhibit 7: From R02-19, written testimony of Robert J. Sheehan & Table 1 “Spawning periods

for fishes in Illinois”

Exhibit 8: “Influences of Hypoxia and Hyperthermia on Fish Species Composition in Headwater

Streams” Martin A. Smale and Chalres F. Rabeni (1995)

Second Hearing: August 12, 2004, Springfield

Exhibit 9: Pre-filed Testimony of Dr. James E. Garvey, with attached July 2004 report entitled

“Long Term Dynamics of Oxygen and Temperature in Illinois Streams” by Dr. Garvey.

Exhibit 10

: Electronic comments by Dr. Gary Chapman in the margins of “An Assessment of

National and Illinois Dissolved Oxygen Water Quality Criteria” James E. Garvey and Matt R.

Whiles (Apr. 2004)

Exhibit 11: One-page hard copy of e-mail sent July 22, 2004 at 8:52 a.m. from Roy M. Harsch

regarding IEPA “implementation rules”

Exhibit 12: Letter entitled “Fight Effort to Lower Fox Oxygen Criteria,” from David J. Horn,

appearing on the Opinion page of the

Daily Herald

Exhibit 13

: Letter dated July 30, 2004 from David L. Thomas, Ph.D, Chief of the Illinois

Natural History Survey to Lieutenant Governor Pat Quinn

---

97

Third Hearing: August 25, 2005

Exhibit 14: Statement of Toby Frevert, Manager of the Division of Water Pollution Control,

IEPA

Exhibit 15: Pre-filed Testimony of Dennis Streicher, Director of Water and Wastewater with the

City of Elmhurst, and President of IAWA

Exhibit 16

: Pre-filed Testimony of Dr. James E. Garvey, with nine attachments

Exhibit 17

: One-page list of streams entitled “Table 2 – Testimony of David L. Thomas, August

2005”

Exhibit 18

: Pre-filed Testimony of Todd Main, Director of Policy and Planning, Friends of the

Chicago River

Exhibit 19

: Pre-filed Testimony of Thomas J. Murphy, Emeritus Professor of Chemistry,

Environmental Science Program, DePaul University

Fourth Hearing: April 25, 2006

Exhibit 20: IEPA/DNR Proposed Rule Language (Attached to 4/4/06 Pre-filed Testimony of

IEPA/DNR)

Exhibit 21: IEPA/DNR Proposed Section 302.Appendix D: Stream Segments for Enhanced

Dissolved Oxygen Protection (Attached to 4/4/06 Pre-filed Testimony of IEPA/DNR)

Exhibit 22: IEPA’s April 24, 2006 Response to Dennis Streicher of IAWA (includes compact

disc of Dissolved Oxygen Results at IEPA Stream Sites (Selected Sites), Grab Samples (1994-

2003), Continuous Monitoring Data (2004-2005))

Exhibit 23

: IEPA/DNR Technical Support Document (Mar. 31, 2006) (Attached to 4/4/06 Pre-

filed Testimony of IEPA/DNR)

Exhibit 24: Compact disc of IEPA/DNR Proposed Streams for Enhanced Dissolved Oxygen

Protection (Attached to 4/4/06 Pre-filed Testimony of IEPA/DNR)

Exhibit 25

: Amended Pre-filed Testimony of Richard Lanyon on behalf of the Metropolitan

Water Reclamation District of Greater Chicago (MWRDGC)

Exhibit 26

: USEPA Method # 360.1, Approved for NPDES (Issued 1971), Oxygen, Dissolved

(Membrane Electrode)

Exhibit 27: Testimony of Thomas J. Murphy, Emeritus Professor of Chemistry, Environmental

Science Program, DePaul University

---

98

Status Conference Call: June 5, 2006

Exhibit 28: Compact disc with May 19, 2006 cover letter from DNR (five copies of disc) (disc

includes the information from Exhibit 24, as well as the following information: stream segments

that IEPA identified in the 2006 Assessment Database as being aquatic life use impaired

(including segments where low dissolved oxygen is identified as a potential cause of

impairment); and National Pollutant Discharge Elimination System (NPDES) discharge points

and associated metadata)

Fifth Hearing: November 2-3, 2006

Exhibit 29: Pre-filed Questions of Environmental Law & Policy Center of the Midwest (ELPC),

Prairie Rivers Network (PRN), and Sierra Club Directed to IEPA/DNR

Exhibit 30: IEPA/DNR Responses to Pre-filed Questions of ELPC, PRN, & Sierra Club

Exhibit 31: Pre-filed Testimony of Thomas J. Murphy, Emeritus Professor of Chemistry,

Environmental Science Program, DePaul University

Exhibit 32: Pre-filed Testimony of Dennis Streicher

Exhibit 33: Certifications of Dissolved Oxygen Sample Collection by the Fox Metro Water

Reclamation District, the City of Naperville, the Greater Peoria Sanitary District, the Village of

Plainfield, the Rock River Water Reclamation District, and the Wheaton Sanitary District

Exhibit 34: Compact disc of IAWA Dissolved Oxygen Sampling Data

Exhibit 35: Pre-filed Testimony of Dr. James E. Garvey

Exhibit 36: Additional Testimony of Dr. James E. Garvey

Exhibit 37

: Abstract of presentation made to the North American Benthological Society entitled

“Effects of hypoxia on brood survival in the freshwater mussel,

Venustaconcha ellipsiformis

,”

B.E. Kaiser, M.C. Barnhart

Exhibit 38: “Anthropogenic Inputs of Nitrogen and Phosphorus and Riverine Export for Illinois,

USA,” Mark B. David, Lowell E. Gentry, reprinted from the

Journal of Environmental Quality

Exhibit 39: “Biological Criteria and Tiered Aquatic Life Uses: Potential Changes to Illinois

Water Quality Standards,” IEPA Bureau of Water (Sept. 2006)

Exhibit 40

: Pre-filed Testimony of Richard Lanyon, MWRDGC

Exhibit 41

: Pre-filed Testimony of Louis Kollias, MWRDGC

---

99

APPENDIX II TO THE OPINION AND ORDER

R04-25

PUBLIC COMMENTS

PC 1 Robert W. Schanzle, President, Illinois Chapter of the American Fisheries Society

PC 2 Nancy Erickson, Director, Natural and Environmental Resources of Illinois Farm Bureau

PC 2.5 Metropolitan Water Reclamation District

PC 3 Thomas E. Tarasiuk

PC 4 Theresa A. Kolady

PC 5 Elaine R. Parnell

PC 6 Donald E. Lupei

PC 7 Justin Czapczyk

PC 8 Gary A. Jannusch

PC 9 Margaret E. Fox

PC 10 Richard A. Hilton

PC 11 Lois Johnson

PC 12 R. Gilkerson

PC 13 Ward P. Schwartz

PC 14 Patrick A. Kimse

PC 15 Jennifer Oviedo

PC 16 Angie Ali

PC 17 The Martlings

PC 18 George W. Carpenter

PC 19 Michele K. Mellor

PC 20 Brandon Zaleiski

PC 21 Edgar Oviedo

PC 22 Paul B. Smith

PC 23 Michael Kirschman

PC 24 The Thrashers

PC 25 The Workman's

PC 26 Alison Richards

PC 27 David J. Horn

PC 28 John E. Mozzocco

PC 29 Jody Strohm

PC 30 Pamela Pesertell

PC 31 The Fishers

PC 32 William H. Holleman

PC 33 Susan Stillinger

PC 34 Linda Gray

PC 35 M. Mey

PC 36 Kris A. Hall

PC 37 A. K. Helland

PC 38 Clifford L. White, Jr.

PC 39 W. H. Brisker

PC 40 Mark Donnelly

PC 41 Lenore G. Lee

---

100

PC 42 John D. McKee

PC 43 Donna Erfort

PC 44 Jyoti Srikishan

PC 45 Patricia Gebhardt

PC 46 Lara Miller

PC 47 Amanda B. Reyes

PC 48 Pat Dieckhoff

PC 49 Mary J. Zaander

PC 50 David H. Arnett

PC 51 Ann Schneck

PC 52 Dawn Rosch

PC 53 Caroline M. Quinlan

PC 54 Rick Maring

PC 55 Kyla Jacobsen

PC 56 The Shroders

PC 57 Ken Schaefer

PC 58 Brad Hoar

PC 59 The Masonicks

PC 60 Dennis Paige

PC 61 Kelley Ann Kepes

PC 62 Danielle Ebersole

PC 63 Christoph Parat

PC 64 Michael Ander

PC 65 Jean Leverenz

PC 66 Judith Boettmer

PC 67 John A. Olson

PC 68 David L. Segel

PC 69 Henry J. Wolf

PC 70 Ann Anderson

PC 71 James O. Breen

PC 72 Robert C. Arnet

PC 73 The Szymanskyj's

PC 74 Nikki Dahlin

PC 75 Gloria Klimek

PC 76 John Webb

PC 77 Mary Robbins

PC 78 Day Waterman

PC 79 Philip W. Cunio

PC 80 Lana M. Haley

PC 81 Jean Flemma, Executive Director, Prairie Rivers Network

PC 82 Dennis Streicher for Illinois Association of Wastewater Agencies

PC 83 Thomas J. Murphy, Ph.D.

PC 84 Todd Main, Policy Director, Friends of the Chicago River

PC 85 Stanton A. Browning, Executive Director, Greater Peoria Sanitary District

PC 86 Gregory J. Brunst, Director, Village of Addison

PC 87 Clifford L. White, Jr., Environmental Services Superintendent, City of St. Charles

---

101

PC 88 Downers Grove Sanitary District

PC 89 Thomas F. Muth, Manager, Fox Metro Water Reclamation District

PC 90 George R. Schillinger, Executive Director, American Bottoms Regional Wastewater

Treatment Facility

PC 91 Michael R. Little, Executive Director, Urbana & Champaign Sanitary District

PC 92 Jane M. Carlson, P.E. and Troy W. Stinson, P.E. of Strand Associates, Inc.

PC 93 Steve Olsen, Plant Foreman of Dekalb Sanitary District

PC 94 Dr. James E. Garvey

PC 95 Chemical Industry Council of Illinois

PC 96 Illinois Department of Natural Resources

PC 97 James L. Daugherty, District Manager, Thorn Creek Basin Sanitary District

PC 98 Metropolitan Water Reclamation District of Greater Chicago

PC 99 Mayor Arthur J. Washkowiak of City of LaSalle

PC 100 Illinois Chapter of the American Fisheries Society

PC 101 Environmental Law & Policy Center, Prairie Rivers Network, and Sierra Club

PC 102 Illinois Association of Wastewater Agencies

PC 103 Illinois Environmental Protection Agency

PC 104 Darrel R. Gavle, P.E. and Pavel Hajda, Ph.D of Baxter & Woodman, Inc. Consulting

Engineers

PC 105 Thomas J. Murphy, Ph.D.

PC 106 James E. Huff, P.E., Vice President, Huff & Huff, Inc.

PC 107 Dennis Streicher of Illinois Association of Wastewater Agencies

PC 108 Robert Fischer, Ph.D, President, ILAFS, Professor of Biology, Associate Chair, Biology,

Eastern Illinois University

PC 109 Dennis Streicher of IAWA and Professor Jim Garvey of IAWA

PC 110 Illinois Environmental Protection Agency’s Response to Dennis Streicher's Public

Comment of April 24, 2007

PC 111 Metropolitan Water Reclamation District of Greater Chicago

PC 112 Dr. Thomas Murphy, Professor

Emeritus

of Chemistry, DePaul University

PC 113 Illinois Association of Wastewater Agencies

PC 114 Illinois Environmental Protection Agency