Total Maximum Daily Load (TMDL) Development Program

TMDL Program Principal:

Kevin Hyatt

307-777-8582

kevin.hyatt@wyo.gov

 

 

Go to:    Current TMDL Projects    Completed TMDL Projects    Watershed-Based Plans

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What is a Total Maximum Daily Load (TMDL) Project?

Basis of all TMDL projects: Section 303(d) of the Clean Water Act and the US EPA’s Water Quality Planning and Management Regulations (40 CFR Part 130) require states to develop TMDLs for waterbodies which are not meeting applicable water quality standards.

Major components of a TMDL project: TMDL projects are based upon the calculation of the total allowable pollutant load for a surface water in order for it to meet the State's Water Quality Standards (this is also referred to as the "assimilative capacity" of the waterbody).  The TMDL project then allocates this allowable load between point sources (waste load allocations or WLAs) and nonpoint sources (load allocations or LAs) while incorporating a margin of safety.

What does a TMDL project "do"?: Based on these waste load and load allocations (WLAs and LAs), point source permits are evaluated and critical areas for implementation of best management practices for nonpoint sources are identified. 

Local stakeholders and public participation is key to a successful project: The TMDL program values and seeks out participation from stakeholders throughout the watershed to restore a surface water so that it meets water quality standards and fully-supports its designated uses.  To achieve this, local stakeholders are asked to participate throughout the project so that assumptions, calculations, and restoration measures are reasonable and accurate.  Public involvement and outreach are critical components for a TMDL project's success.

■  Click here to visit the EPA's website for additional information on impaired surface waters and TMDLs.

■  Receive important public announcements from Wyoming DEQ - sign-up for Listserve.  Select "waterqualitygeneralinfoandrulemaking@ewyoming.gov" (the last option on the list)

Find out which watershed you live in!


The 305(b) Integrated Report and the 303(d) List of Impaired Waterbodies

Section 303(d) of the Clean Water Act requires states to:

1) Identify all waters of the state which are impaired--i.e. they contain pollutants which adversely affect the water quality (and associated designated uses) of the water.

2) Prioritize all impaired waterbodies for development of TMDLs. Prioritization is to take into consideration public health and environmental risk.

3) Establish and adopt TMDLs for all impaired waterbodies or for waterbodies which would be impaired if a TMDL was not established.

If a state does not comply with Section 303(d), the Environmental Protection Agency is required to perform these activities.

Every two years, the state must evaluate it's water quality data, and submit an updated impaired waterbody list to the Environmental Protection Agency (EPA) for approval. This list is generated from the Statewide Water Quality Assessment (also known as the 305(b) Report) which also must be submitted every two years.

  • ■  The 2012 305(b) Integrated Report: PDF file

  • ■  Excerpt from the 2012 Integrated Report - the 2012 303(d) List: PDF file

Wyoming's Nonpoint Source Program

In 1989, the State adopted a Nonpoint Source Management Plan to address nonpoint sources of pollution. Under this voluntary program, the state provides Clean Water Act Section 319 funds to local entities for projects which address nonpoint source pollution.

  • ■  Visit the State of Wyoming Nonpoint Source Program here.

  • ■  What are the 9 Key Elements of Watershed-Based Planning?  Find out here.

 

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TMDL Projects Currently Under Development

Note: The EPA fiscal year (FY) is from October 1st to September 30th

Project Name

County

Impairment(s)

Target Completion Date

Conservation District(s)

Notes

Water Body Identifiers

Bighorn & Greybull Rivers

Park, Bighorn, Washakie, Hot Springs

E. coli and fecal coliforms

FY2013

Hot Springs, Washakie County, Meeteetse, South Bighorn, Powell-Clarks Fork, Shoshone

Draft TMDL Document

Draft Implementation Plan

WYBH100800070305_01
WYBH100800070500_01
WYBH100800070809_01
WYBH100800070909_01
WYBH100800071000_01
WYBH100800071000_02
WYBH100800071001_01
WYBH100800071001_02
WYBH100800080607_01
WYBH100800080705_01
WYBH100800090405_01
WYBH100800100102_01
WYBH100800100204_01
WYBH100800100206_01
WYBH100800100301_01
WYBH100800110204_01

North Platte

Natrona

Selenium

FY2012

Natrona County

Phased TMDL

WYNP101800070300_01
WYNP101800070302_01
WYNP101800070302_02
WYNP101800070302_03
WYNP101800070303_01
WYNP101800070406_01
WYNP101800070406_02
WYNP101800070406_03
WYNP101800070503_01
WYNP101800070504_01
WYNP101800070703_01

Hams Fork

Lincoln, Sweetwater

pH

FY2014

Lincoln County, Sweetwater County

 

WYGR140401070701_01

Bitter & Killpecker Creeks

Sweetwater

E.coli & Chloride

FY2016

Sweetwater

 

WYGR140401050506_01
WYGR140401050808_01

Crow Creek

Laramie

Sediment

FY2012

Laramie County

 Selenium & E.coli TMDL Reports Approved

WYSP101900090107_01
WYSP101900090107_02
WYSP101900090107_03

Shoshone River

Clark & Big Horn

E.coli

FY2013

Cody, Powell-Clarks Fork, & Shoshone

 Shoshone Project Page

WYBH100800140504_00
WYBH100800140408_02
WYBH100800140408_01
WYBH100800140407_01
WYBH100800140107_01
WYBH100800140206_01
WYBH100800140303_01
WYBH100800140307_01

Bear River

Uinta

Sediment

FY2014

Uinta County

Bear River Project Page

WYBR160101010303_01

Blacks Fork & Smiths Fork

Uinta

E.coli & Habitat Degradation

FY2014

Uinta County

 Blacks Fork & Smiths Fork Project Page

WYGR140401070106_01
WYGR140401070208_00
WYGR140401070208_01
WYGR140401070208_01
WYGR140401070403_01

Willow Creek Uinta Habitat Degradation FY2016 Uinta County Willow Creek Information WYGR140401070205_01
Salt River Watershed Lincoln E.coli FY2015 Star Valley Salt River Watershed Webpage WYSR170401050203_01
WYSR170401050309_01

 

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Completed TMDL Projects

Project Name

Previous Impairment

EPA Approval Date

Documents

Water Body Identifiers

Ocean Lake

Sediment

12/3/2009

TMDL Document

WYBH100800050202_01

Goose Creek

Fecal Coliforms & Sediment

9/28/2010

 TMDL Document and the Appendices

WYTR100901010204_01
WYTR100901010204_02
WYTR100901010205_01
WYTR100901010205_02
WYTR100901010207_01
WYTR100901010207_02
WYTR100901010208_01
WYTR100901010208_02
WYTR100901010208_03
WYTR100901010209_01
WYTR100901010209_02

Haggarty & West Fork Battle Creeks

Copper, Cadmium, & Silver

9/28/2011

 TMDL Document

WYLS140500030109_01
WYLS140500030109_02

Gillette Fishing Lake

Phosphorus & Sediment

7/11/2013

TMDL Document

WYBF101202010601_01

Crow Creek - Selenium

Selenium

8/7/2013

TMDL Document

WYSP101900090107_02

Belle Fourche
E. coli, Ammonia, & Chloride 12/30/2013 TMDL Document WYBF101202010501_01
WYBF101202010504_00
WYBF101202010600_01
WYBF101202010602_01
WYBF101202010904_00
Crow Creek - E.coli E.coli 2/14/2014 TMDL Document WYSP101900090107_01
WYSP101900090107_02
WYSP101900090107_03
WYSP101900090107_04
WYSP101900090107_05
WYSP101900090203_01

 

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Watershed-Based Plans

Project Name

County

Documents

Prairie Dog Creek Watershed-Based Plan

Sheridan

 Report
Appendices
A_Subwatersheds
A_Priority Reaches
A_Land Cover
A_Land Ownership
A_Irrigated Lands
B_Water Quality Data
C_Upper Subwatershed Load Duration Curves
C_Middle Subwatershed Load Duration Curves
C_Lower Subwatershed Load Duration Curves
C_Dutch Creek Subwatershed Load Duration Curves

 

Page Last Updated: 4/17/2014