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Guadalupe River Above Canyon Lake: TMDL, I-Plan, and Reports

The TMDL and its I-Plan are the road maps for activities to make Gilleland Creek safer for recreation.
Project Location and Parameters Guadalupe River Project Navigation TMDL Program Navigation
County: Kerr
Parameter: Bacteria
River Basin: Guadalupe
Segments: 1806, 1806D, 1806E

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Status and Activities

TMDL Projects


Implementation Plan

On August 31, 2011, the commission approved the plan to implement the TMDL for bacteria.

Revised Implementation Plan

In 2018, the stakeholders and the Upper Guadalupe River Authority prepared a revised I-Plan to continue their efforts in improving local water quality.

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On July 25, 2007, the commission adopted the TMDL.

The EPA approved it on September 25, 2007, at which time it became part of the state’s Water Quality Management Plan.

Revisions to the TMDLs

From time to time, it is necessary to revise TMDLs to account for changing conditions in the watershed. Revisions to the load allocations in TMDLs are made via the state’s Water Quality Management Plan (WQMP), which is updated quarterly. Revisions are made to TMDLs in one of two ways:

  • 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.
  • 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.


Additional TMDLs have been added for the watershed by addendum.


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Contact the TMDL Program

Please e-mail us at, and mention the Guadalupe River bacteria project in the subject line. Or call us at 512-239-6682.

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