Cambria Cavern to be shut up

Williamson County

In February, it was unearthed — but soon the cave that opened up in a neighborhood west of Round Rock will be filled in and closed off.

Cambria Cavern was originally measured about 200 feet long and 20 feet deep. As researchers dug core samples, they also discovered another chamber.

The hole in the ground and what was underneath fascinated those living in the Brushy Creek neighborhood, who gathered around when it first opened to try to sneak a peek inside, and as subsequent work was being done. Someone even illegally entered the cave at the beginning of April, prompting heightened security.

However, homeowners also had concerns about how it would affect their foundations.

There isn’t a specific timeline yet, but soon the cave will have more construction as the Texas Commission on Environmental Quality approved a plan Tuesday to close it. The move would help protect the water quality and keep the cave connected to the area aquifer, but it will also allow Williamson County to reopen Cambria Drive and Ephraim Road.

First, the county will remove the material that fell when the cave ceiling collapsed, then fill it with free-draining gravel topped with a filter fabric and layers of concrete. The only portion of the cave that will be filled will be under the county’s right-of-way. Utilities will then be re-established and the road reconstructed.

The county is accepting bids in the next few weeks and expects to begin repairs in about a month. “The County is committed to completing the work as quickly as possible,” it said in a statement.

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