Wyoming DEQ

Content taken from: http://deq.state.wy.us/wqd/watershed/TMDL/TMDL.htm

Total Maximum Daily Load (TMDL) Development Program

David Waterstreet

If you have any questions, please contact David Waterstreet at (307) 777-6709.

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) requires 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 are keys to a successful project. The TMDL program values and seeks out participation from stakeholders throughout the watershed to restore 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.
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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 the 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 (EPA) is required to perform these activities.

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

The 305(b) Integrated Report

Excerpt from the Integrated Report – the 2012 303(d) List

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.

Completed Projects

This page contains a list of TMDL project documents that have been completed, including the project name, previous impediment, and EPA approval date.

Bear River – Sediment – TMDLs – 2014 (PDF) (2019-02-28)
Bear River – Sediment – TMDLs – 2014 – Appendix (PDF) (2019-02-28)
Belle Fourche River – Watershed – TMDLs – 2013 (PDF) (2019-02-28)
Big Horn and Greybull Rivers – E. coli – TMDLs – 2014 (PDF) (2019-02-28)
Bitter Creek – E. coli – TMDLs – 2018 (PDF) (2019-02-28)
Crow Creek – E. coli – TMDL – 2014 (PDF) (2019-02-28)
Crow Creek – Selenium – TMDL – 2013 (PDF) (2019-02-28)
Gillette Fishing Lake – Watershed – TMDLs – 2013 (PDF) (2019-02-28)
Goose Creek – Watershed – TMDLs – 2010 (PDF) (2019-02-28)
Goose Creek – Watershed – TMDLs – 2010 – Appendices (PDF) (2019-02-28)
Haggarty Creek – Watershed – TMDLs – 2011 (PDF) (2019-02-28)
Middle Fork Crow Creek – E. coli – TMDL – 2016 (PDF) (2019-02-28)
Ocean Lake – Sediment – TMDL – 2009 (PDF) (2019-02-28)
Prairie Dog Creek – E. coli – TMDLs – 2018 (PDF) (2019-02-28)
Salt River – E. coli – TMDLs – 2015 (PDF) (2019-02-28)
Shoshone River – E. coli – TMDLs – 2013 (PDF) (2019-02-28)

Completed TMDL Projects

Project Name	Previous Impairment	EPA Approval Date	Documents	Water Body Identifiers
Ocean Lake	Sediment	12-03-2009	TMDL Document	WYBH100800050202_01
Goose Creek	Fecal Coliforms and 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 and West Fork Battle Creeks	Copper, Cadmium, and Silver	9/28/2011	TMDL Document	WYLS140500030109_01 WYLS140500030109_02
Gillette Fishing Lake	Phosphorus and Sediment	07-11-2013	TMDL Document	WYBF101202010601_01
Crow Creek - Selenium	Selenium	08-07-2013	TMDL Document	WYSP101900090107_02
Belle Fourche	E. coli, Ammonia, and 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
Bighorn and Greybull Rivers	E. coli and Fecal Coliforms	4/30/2014	TMDL Document	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

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_Middle Subwatershed Load Duration Curves C_Dutch Creek Subwatershed Load Duration Curves

Page Last Updated: 6/10/2014