GBRA Changes Lake Dunlap Dam Maintenance

USACE Changes Releases Affecting River Flow

Posted: April 20, 2010

For more information
LaMarriol Smith, Guadalupe-Blanco River Authority, (830) 379-5822 or email

SEGUIN - Guadalupe-Blanco River Authority officials have delayed the lowering of the water level at Lake Dunlap until climatic conditions and releases from Canyon Reservoir permit. Initially, GBRA planned to lower Lake Dunlap approximately 18 to 24 inches beginning Sunday, April 18, so that GBRA hydroelectric crews could perform routine maintenance to the dam.

The U.S. Army Corps of Engineers (USACE) served notice of changes in the rate of release of water from Canyon Reservoir on April 20, 2010. USACE officials indicated both service gates would be opened to 2 feet from their current setting of 1 foot, producing a flow of about 1,600 cubic feet per second (cfs). USACE officials said the 1,600 cfs flow would remain until the USACE lake control directs a change.

In the meantime, conditions and releases from Canyon Reservoir are not conducive for the type of work planned. In order to conduct the work, GBRA crews need two weeks with total flows at Lake Dunlap at about 800 cfs. It will take crews approximately three days to mobilize to start the work.

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.

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© 1998 Guadalupe-Blanco River Authority

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