7/19/2018 - Cambria Cave Site

Cambria Cave Site

Check the Williamson County website for current updates.

Fifth Chamber Extends under Ephraim Drive

August 8, 2018 (Williamson County, Texas) -- Williamson County’s environmental consultants went back into the fifth chamber of the cave under Cambria Drive on Tuesday to pinpoint its location relative to Ephraim Road. The fifth chamber’s lower level is found to extend approximately eight feet into Ephraim Road and does not stop at the curb as previously estimated. The lower level of the fifth chamber is located about 20 feet below the road, so structural engineers do not feel there is any immediate danger for vehicles passing over the road due to the depth of the cave. In an abundance of caution, however, heavy construction vehicles will not be allowed to park over portions of the upper level of the fifth chamber.

Williamson County is working with the Texas Commissioner on Environmental Quality (TCEQ) to determine how to handle any remediation work for the fifth chamber. Until this has been determined, all remediation work at the cave has stopped. 


Background: On February 8, 2018, a cave under Cambria Drive was discovered when the cave roof collapsed, and a water pipe was broken affecting water service to nearby homes. The cave starts at approximately the middle of the Cambria Drive 20 feet west of the curb and heads east approximately 200 feet and north approximately 45 feet. The cave has five chambers. The height of the cave varies reaching a height of approximately 22 feet near the entrance down to only three feet high in the fourth chamber and lower level of the fifth chamber.