Army Corps Of Engineers Grants GBRA Request For Seasonal Pool Deviation

At the request of Guadalupe-Blanco River Authority (GBRA) officials, the U.S. Army Corps of Engineers (USACE) granted a seasonal pool deviation of one foot at Canyon Reservoir. The normal conservation pool elevation for Canyon Reservoir is 909 mean sea level (msl), which is the level at which GBRA begins to control releases for water supply purposes. With the seasonal pool deviation, GBRA will control releases from Canyon at 910 msl.

Canyon Reservoir’s elevation today is 909.60 msl with the inflow at Spring Branch indicating 630 cubic feet per second (cfs) while flow releases at the Sattler gauge indicate 400 cfs.

Because of contractual obligations under the current conditions, GBRA is required to release at about 200 cfs from Canyon. With the seasonal pool deviation, GBRA will add 100 cfs for a total release rate of 300 cfs. Beginning at 6 p.m., Monday, July 6, GBRA staff will reduce Canyon Reservoir flow releases from 400 cfs down to 300 cfs.

“Having the one foot seasonal deviation should make for excellent recreational opportunities for as long as the water will last,” GBRA General Manager Bill West, Jr., said.

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The GBRA was established by the Texas Legislature in 1933 as a water conservation and reclamation district. GBRA provides stewardship for the water resources in its 10-county statutory district, which begins near the headwaters of the Guadalupe and Blanco rivers, ends at San Antonio Bay, and includes Kendall, Comal, Hays, Caldwell, Guadalupe, Gonzales, DeWitt, Victoria, Calhoun, and Refugio counties.