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New floodgate test on Wirtz Dam, Tuesday, June 30

Wirtz Dam

The floodgates of Wirtz Dam, which separates Lake LBJ from Lake Marble Falls. Photo courtesy of LCRA

The Lower Colorado River Authority will test a newly-completed floodgate at Wirtz Dam on the morning of Tuesday, June 30, as part of a larger, $76 million renovation of the dam.

According to the LCRA, an alert siren warning of the floodgate’s opening will sound for approximately 15 minutes on Tuesday morning leading up to the test. Downstream flows from the dam in Lake Marble Falls are expected to be higher and faster than typical during and shortly after the test. Wirtz Dam separates Lake LBJ from Lake Marble Falls.

Once the test is completed, the LCRA will update its online notice found here.

The test is part of a broader initiative to modernize the Wirtz Dam to ensure it will operate safely in the future. The initiative, projected to cost a total of $76 million, will replace each of the dam’s 10 floodgates with new, modern ones. The first of those replacements was completed in March 2024.

The LCRA also plans to upgrade the dam’s hoists and hoist bridge, which help to lift the floodgates.

The project is currently estimated to be completed in 2026. For more information, visit the Wirtz Dam Project website.

caden@thepicayune.com

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