ZAPATA — This small South Texas border community 200 miles southwest of San Antonio hugs one of the largest reservoirs in Texas, along what was once one of the nation’s mightiest rivers. But on a hot summer day in mid-August, Zapata was dangerously close to running out of water.
Joe Rathmell, the Zapata County judge, remembers getting the call from a worried water plant manager. It wasn’t good. The only thing flowing into the county’s intake station seemed to be mud. The pumps were failing as they struggled to suck the silty water from Falcon Lake.