Greater Trinity Region

On this page:

• Approved I-Plan
• Adopted TMDLs
• Contact the TMDL Program

Approved I-Plan

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

•  Implementation Plan for the Greater Trinity River Region
•  Response to Public Comment on the I-Plan

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

•  Revised Implementation Plan, 2020

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.

•  Resolution Supporting the Addition of the Mountain Creek Lake Tributary Segments to the Implementation Plan

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

•  Resolution Supporting the Addition of the Sycamore Creek to the Implementation Plan

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.

•  Two TMDLs for Indicator Bacteria in Cottonwood Branch and Grapevine Creek
  Segments 0822A and 0822B; Assessment Units 0822A_02 and 0822B_01
•  Response to Public Comment on the TMDLs for Cottonwood Branch and Grapevine Creek

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 website .

Lower West Fork Trinity River

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

•  Thirteen Total Maximum Daily Loads for Bacteria in Lower West Fork Trinity River and Tributaries
  Segments 0841, 0841B, 0841C, 0841E, 0841G, 0841H, 0841J, 0841L, 0841M, 0841R, 0841T, and 0841U; Assessment Units 0841_01, 0841_02, 0841B_01, 0841C_01, 0841E_01, 0841G_01, 0841H_01, 0841J_01, 0841L_01, 0841M_01, 0841R_01, 0841T_01, and 0841U_01
•  Response to Public Comment on the TMDLs for the Lower West Fork Trinity River and Tributaries

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.

• Addendum One: One TMDL for Indicator Bacteria in Dry Branch Creek 
  

  Segment 0841I, Assessment Unit 084I_01
  October 2023 WQMP Update, Approved by EPA Jan. 22, 2024

Mountain Creek Lake Upstream Watersheds

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

•  Four Total Maximum Daily Loads for Indicator Bacteria in the Cottonwood Creek, Fish Creek, Kirby Creek, and Crockett Branch Watersheds Upstream of Mountain Creek Lake
  Segments 0841F, 0841K, 0841N, and 0841V; Assessment Units 0841F_01, 0841K_01, 0841N_01, and 0841V_01
• No public comments were received.

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.

•  Addendum One: One TMDL for Bacteria in North Fork Fish Creek

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

•  Addendum Two: One TMDL for Indicator Bacteria in North Fork Cottonwood Creek

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

Sycamore Creek

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

•  One Total Maximum Daily Load for Bacteria in Sycamore Creek
  Segment 0806E; Assessment Unit 0806E_01
•  Response to Public Comment on the TMDL for Sycamore Creek 

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.

•  Two Total Maximum Daily Loads for Indicator Bacteria in the Upper Trinity River
  Segment 0805; Assessment Units 0805_03 and 0805_04
•  Response to Public Comment on the TMDLs for the Upper Trinity River

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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