Questions or Comments: tmdl@tceq.texas.gov

I-Plan and TMDLs: Greater Trinity Region

The TMDLs and their I-Plan are the road maps for activities protecting recreation in area water bodies.

fishing at Lower West Oakland LakeTrinity River Segment 0841 at Collins Streetheron on the Trinity River

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Project Location and Parameters Greater Trinity Region Project Navigation TMDL Program Navigation
Watershed County: Dallas
Parameter: Bacteria
River Basin: Trinity
Segments: 0805, 0806E, 0822A, 0822B, 0841, 0841B, 0841C, 0841E, 0841F, 0841G, 0841H, 0841J, 0841K, 0841L, 0841M, 0841N, 0841Q, 0841R, 0841T, 0841U, 0841V

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Status and Activities

Reports and Other Documents

TMDL Projects

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On this page:

Approved I-Plan

On December 11, 2013, the commission approved the I-Plan developed by the stakeholders.

The stakeholders last revised their I-Plan in June 2020. It includes water bodies added by resolution.

By resolution in June 2015, the stakeholder Coordination Committee added four tributary segments (0841F, 0841K, 0841N, and 0841V) of Mountain Creek Lake to this project.

By resolution in June 2018, the stakeholder Coordination Committee added Sycamore Creek, Segment 0806E, to this project.

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Adopted TMDLs

On the date of their approval by the Environmental Protection Agency (EPA), all these TMDLs become part of the state’s Water Quality Management Plan.

Cottonwood Branch and Grapevine Creek

On September 21, 2011, the TCEQ adopted the TMDLs for Cottonwood Branch and Grapevine Creek. The EPA approved them on May 30, 2012.

Updates

Updates are made to account for changing conditions in the watershed, such as new or revised wasteload allocations, permits that have been canceled or have expired, or changed facility names. Updates use the same units of measure as the original TMDL.

  • October 2019, Appendix III, pages 33-49

WQMP updates may be viewed in person at the TCEQ Library, Building A, 12100 Park 35 Circle, Austin, Texas. Electronic versions of updates published from 2014 through the present are available on the Texas State Library and Archives Commission websiteExit the TCEQ.

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Lower West Fork Trinity River

On September 24, 2013, the TCEQ adopted these TMDLs. The EPA approved them on November 7, 2013.

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Mountain Creek Lake Upstream Watersheds

On November 2, 2016, the commission adopted these TMDLs. The EPA approved them on December 7, 2016.

Addenda

Addenda are created to add load allocations for assessment units that are impaired by the same pollutant or condition, within the same watershed as in the original TMDL report. Addenda are added via the state's Water Quality Management Plan.

Segment 0841Q, Assessment Unit 0841Q_01
October 2019 WQMP Update, Approved by EPA March 11, 2020

Segment 0841P, Assessment Unit 0841P_01
April 2022 WQMP Update, Approved by EPA August 11, 2022

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Sycamore Creek

On January 16, 2019, the commission adopted this TMDL. The EPA approved it on March 27, 2019.

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Upper Trinity River

On May 11, 2011, the TCEQ adopted these TMDLs for the Upper Trinity River. The EPA approved them on August 3, 2011.

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Contact the TMDL Program

Please email tmdl@tceq.texas.gov, and mention the Greater Trinity River plan in the subject line. Or call us at 512-239-6682.

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