The U.S. Geological Survey records the lake levels of all lakes in Texas on a daily basis. Its website provides current gauge levels and the discharge rate in cubic feet per second. As of August 2014, the deepest lake is Lake Travis, with a maximum depth of 210 feet.
Sheldon Lake is listed as the most shallow lake in Texas as of August 2014, with an average depth of only 10 feet. The U.S Geological Survey also monitors stream flow, ground water tables, precipitation rates and water quality of all Texas lakes, groundwater and streams. Its website also offers customization for a wide range of factors to monitor Texas waterways.