Rendering of the finished dam
Old Lampasas Dam Modernization
April 2025 Construction Update
Excavation for the Old Lampasas Dam Modernization continues this month. Excavated material is being transported for reuse in other construction projects around the City. Communities are advised to expect increased noise in the area during regular construction hours.
Completed Tasks:
- Over 10,000 cubic yards of rock material to date have been transported for reuse in various City facilities and projects.
- A temporary cofferdam has been installed to keep the project site dry during excavation
Upcoming Work:
- Excavation for the dam as well as the principal and auxiliary spillways will continue through the end of the month
Project Background
Built in 1984, the Old Lampasas Dam is a high-risk dam that is in poor condition and was significantly damaged during Tropical Storm Hermine in 2010. This project will repair the dam, bring it into compliance with Texas Commission on Environmental Quality (TCEQ) safety regulations, reduce flood risks in the neighborhood, and improve water quality in Bull Creek. Construction for the Old Lampasas Dam Modernization project began in October 2024 and is anticipated to reach substantial completion by spring 2026, weather permitting.
Reminders and Timeline
- The construction site is for authorized personnel only
- City of Austin permitted construction hours are:
- Monday – Friday, 7 a.m. – 7 p.m.
- Saturday, 8 a.m. – 7 p.m.
- The project team will notify neighborhoods in advance of any weekend work
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