San Marcos Water Treatment Plant Division
San Marcos Water Treatment PlantThis division operates and manages the City of San Marcos' water treatment plant, recently upgraded to 9 mgd. Raw water from Canyon Reservoir is pumped from Lake Dunlap through a 20-mile pipeline, treated to meet state and federal drinking standards, and delivered to the cities of San Marcos and Kyle for distribution.
The plant is owned by the City of San Marcos, which selected GBRA to be the contract operator of this $7.2 million facility. Operations began in January 2000 with an initial treatment capacity of 6 mgd, and can be expanded to 24 mgd to meet future regional growth requirements.
The plant's water source is stored water from Canyon Reservoir, contracted by the City of San Marcos. GBRA built and owns the pump station at Lake Dunlap that diverts the stored water, and the 24 miles of pipeline that deliver the water to the plant for treatment.
The conversion to surface water has reduced the City of San Marcos' daily pumping from the Edwards Aquifer by an average of 75%. Reduced pumping protects the springflow contributions to the Guadalupe River from the Comal Springs and the San Marcos Springs. Existing city wells can be reserved for use as supplemental resources during peak usage periods.
  • Location: San Marcos, TX
  • Startup Operation Date: January 2000
  • Current Capacity: 21 mgd
  • Service Area: Cities of San Marcos, Kyle and Buda, and unincorporated areas along IH35 in northen Hays county.
  • Service Population: 40,000
Contact
Darel Ball, Division Manager
Phone: 512-353-3888
Fax: 512-353-3127
E-mail:
DROUGHT INFORMATION (more...)
GBRA Water Conservation Plan
GBRA Drought Contingency Plan
Summary of Water Conservation/Drought Plans
Video: The Climate Detective
Video: San Marcos Springs
Video: Comal Springs
CURRENT FLOW & LAKE DATA        (more...)
(+/-0.00) - indicates change in 24 hours
J-17 Well: 675.5 msl (+3.7)
Canyon Reservoir 0.00 msl (+0.00)
Guadalupe @ Sattler 233 cfs (-366)
Comal Springs 1090 cfs (-1320)
San Marcos Springs 227 cfs (-152)
Guadalupe @ Gonzales 4030 cfs (+1880)
Guadalupe @ Victoria 6680 cfs (+4210)
Coleto Reservoir 98.37 msl (+0.10)
Guadalupe @ Tivoli 3410 cfs (+1230)
Sources of Flow at Victoria
Canyon Release 3.49%
San Marcos Springs 3.40%
Comal Springs 16.32%
Natural Base Flow 76.80%
(Percentages reflect sources. Losses and diversions not included.)
RESOURCE LIBRARY (more...)
- Texas E-Flows Process - August 2010
- Land Stewardship - August 2010
- Caldwell County Regional Water and Wastewater Planning Study
- Canyon Gorge
- Canyon Reservoir Fact Sheet
- GBRA River Run
CONSERVING A TEXAS TREASURE
Guadalupe RiverThe Guadalupe-Blanco River Trust was founded in 2001 to conserve land in the Guadalupe River Watershed.
Learn more...