Buchanan & Wirtz Dam Instrumentation

Project Location: Austin, Texas
Owner: Lower Colorado River Authority
Contract Value: $383,944
Completed: 2017

LCRA desired to install 14 vibrating wire piezometers in the Buchanan and Wirtz Dams on the Lower Colorado River. The piezometers were to be installed through the buttresses into the hard underlying rock.  Access was very limited for equipment and personnel on top of the narrow buttresses.  Working as a subcontractor to Freese and Nichols, work platforms were constructed and small equipment was utilized to drill through 70 feet of concrete and 20 feet of quartzite rock.  Instruments were installed and grouted in place.  The project was environmentally sensitive and all drilling fluids had to be filtered and recycled.