The Highland Lakes were created to manage floods and capture water when it rains to ensure the region has a reliable water supply during dry times. Lakes Buchanan and Travis – the region's water supply reservoirs – provide water for more than a million users, including communities, industries, businesses, agriculture and the environment in the lower Colorado River basin. Together, lakes Buchanan and Travis can hold about 2 million acre-feet of water. It's important to note that none of the Highland Lakes are constant-level lakes.
Inflows and lake level projections
Lakes Travis and Buchanan began 2019 as essentially full after widespread rains the last four months of 2018. LCRA's six-month projections for Lake Travis and Lake Buchanan show lake levels are expected to remain above normal, even if conditions turn very dry.
At 118,381 acre-feet, inflows into the lakes in January were about 188 percent of the historic monthly average and continued the trend of above-average inflows that began in September 2018. Inflows are the amount of water flowing into the lakes estimated from measurements at four gauges upstream. (An acre-foot is 325,851 gallons.)