Granger Dam, also known as Granger Lake, is a Federal-owned water supply dam located in Laneport, Williamson County, Texas.
Wind
Humidity
Completed in 1979, this Earth dam serves multiple purposes including fish and wildlife pond, flood risk reduction, recreation, and of course, water supply for the region. With a height of 115 feet and a storage capacity of 650,000 acre-feet, the dam poses a high hazard potential due to its location on the San Gabriel River.
Despite the risks associated with the dam, USACE Fort Worth District has implemented various risk management measures to ensure the safety and stability of Granger Dam. Regular inspections, surveillance, and monitoring are conducted to detect potential concerns, especially during high water levels. Additionally, the district works closely with local emergency managers to develop and update evacuation plans, conduct emergency exercises, and communicate risks to stakeholders. Although the dam reduces flooding risk downstream, the possibility of a breach could have severe consequences for nearby rural communities and cities, emphasizing the importance of continued vigilance and proactive risk mitigation efforts.
Year Completed |
1979 |
Dam Length |
15240 |
Dam Height |
115 |
River Or Stream |
SAN GABRIEL RIVER |
Primary Dam Type |
Earth |
Surface Area |
4400 |
Hydraulic Height |
114 |
Drainage Area |
475 |
Nid Storage |
650000 |
Structural Height |
115 |
Outlet Gates |
Uncontrolled - 0 |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
115 |
San Gabriel Rv At Laneport
|
3cfs |
Willis Ck Nr Granger
|
0cfs |
Little Rv Nr Little River
|
97cfs |
Little Rv Nr Rockdale
|
153cfs |
Berry Ck At Airport Rd Nr Georgetown
|
0cfs |
Salado Ck At Salado
|
8cfs |
| Location | Reservations | Toilets |
|---|---|---|
Wilson Fox - Granger Lake
|
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Taylor - Granger Lake
|
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Willis Creek - Granger Lake
|