Lake Travis is considered "full" (at maximum desired capacity) when the lake's water level is at 681 feet (208 m) above mean sea level (msl).
Above 681 feet (208 m), flood control gates at Mansfield Dam are opened under the direction of the U.S. Army Corps of Engineers.
The level of the lake can vary dramatically—with an over 96-foot range between its historical high and low—depending on the amount of rainfall in the Colorado River basin upstream.
 The historic high level on the lake was 710.4 feet (216.5 m) above msl on December 25, 1991, a little less than four feet below the dam's top/spillway at 714 feet (218 m) above msl.
The historic low was 614.2 feet (187.2 m) above msl on August 14, 1951.
Lake Travis is considered "full" (at maximum desired capacity) when the lake's water level is at 681 feet (208 m) above mean sea level (msl). Above 681 feet (208 m), flood control gates at Mansfield Dam are opened under the direction of the U.S. Army Corps of Engineers. The level of the lake can vary dramatically—with an over 96-foot range between its historical high and low—depending on the amount of rainfall in the Colorado River basin upstream.  The historic high level on the lake was 710.4 feet (216.5 m) above msl on December 25, 1991, a little less than four feet below the dam's top/spillway at 714 feet (218 m) above msl. The historic low was 614.2 feet (187.2 m) above msl on August 14, 1951.
Lake Travis