Guadalupe-Blanco River Authority The Guadalupe-Blanco River Authority or GBRA was formed in 1933 by the Texas legislature. Its main concerns are water supply and water conservation in the Guadalupe River Basin, which includes the Blanco, Comal, and San Marcos rivers. The authority extends over ten counties. The general offices of the authority are located at 933 East Court Street in Seguin. Dams and reservoirs The GBRA currently operates dams that form seven reservoirs along the Guadalupe River in Texas: Lake Dunlap Lake Gonzales Lake McQueeney Meadow Lake Lake Placid Lake Wood Other reservoirs managed by the GBRA include: Coleto Creek Reservoir References See also Upper Guadalupe River Authority List of Texas river authorities Category:Public utilities established in 1933 Category:Guadalupe River (Texas) Category:River authorities of Texas Category:Water companies of the United States