Leon Creek, Segment 1906 TMDL For dissolved Oxygen and Bacteria Impairments

Leon Creek, Segment 1906 TMDL For dissolved Oxygen and Bacteria Impairments

The draft 2008 TCEQ 303(d) List (March 19, 2008) identified several assessment units in the Lower Leon Creek as being impaired based on the state’s contact recreation (bacteria) and high aquatic life (dissolved oxygen) use criterion. In response to these conditions, the TCEQ Total Maximum Daily Load Program in partnership with the San Antonio River Authority (SARA)initiated a project to verify depressed dissolved oxygen and develop information necessary to support a bacterial (E. coli) Total Maximum Daily Load (TMDL) in the Lower Leon Creek, Segment 1906. The specific objectives of the Leon Creek Segment 1906 TMDL for Dissolved Oxygen and Bacteria Impairments, TCEQ contract number 582-8-80193 were to: (1) Collect targeted 24 hour dissolved oxygen data in order to verify the water quality impairment and overall organic loading; (2) Collect targeted bacterial data in order to establish source of impairment and over loading; (3) Conduct modeling and assessment activities required to allocate loading; (4) Provide technical assistance to the TCEQ in the evaluation of actions necessary to achieve the recommended loading allocations, and; (5) Document, compile, and summarize technical analyses in reports to the TCEQ. There were two phases to this project; Phase I addressed dissolved oxygen deficiencies in Leon Creek, Phase II addressed excessive bacteria concentrations.

Project Details:



Related Projects

This project will assess the long-term space needs of the River Authority and evaluate various options regarding new building designs for the property located at…
This project will begin design and construction on Mann’s Crossing Park on the Medina River, Hendrick Arnold Park (Straus medina), Trueheart Ranch, and Espada Park.…
The San Antonio River Authority is collaborating with the US Army Corps of Engineers to restore portions of the Westside Creeks, including portions of San…


Acequia Trail Notice

The Acequia trail will have heavy traffic near MROC starting May 22nd until further notice. The SAWS Acequia project will be bringing in crews to work on the lift station site and across the street. There will have flaggers to stop traffic, please use caution. 

SASPAMCO Paddling Trail

The SASPAMCO paddling trail is open from River Crossing Park to Helton Nature Park.
*Please Note: Paddling Trail from Helton Nature Park to HWY 97 is still closed due to blockages. 

River Reach Newsletter and Blog Signup

River Reach is offered as a printed, physical mailing to your residence or business. The Blog is a weekly electronic email with news and updates in order to be more environmentally conscious. Please fill out the form below and indicate your preferred method of delivery.

By submitting this form, you are consenting to receive marketing materials from: San Antonio River Authority, 100 East Guenther St., San Antonio, TX, 78204, US. You can revoke your consent to receive emails at any time by using the SafeUnsubscribe® link, found at the bottom of every email. Emails are serviced by Constant Contact. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.