Located in Hays, Texas, the Upper San Marcos River WS SCS Site 3 is a vital flood risk reduction infrastructure managed by the local government.
Wind
Humidity
Built in 1991 by the USDA NRCS, this earth dam stands at a height of 60 feet and spans 988 feet along Sink Creek. With a storage capacity of 4323 acre-feet, this structure plays a crucial role in managing floodwaters and protecting the surrounding area from potential inundation.
With a drainage area of 5.6 square miles and a maximum discharge capacity of 79,912 cubic feet per second, the dam's uncontrolled spillway, measuring 306 feet wide, ensures the safe release of excess water during high flow events. Regularly inspected and deemed to be in satisfactory condition, this structure is equipped with slide and uncontrolled gates for efficient water management. Despite its moderate risk rating, the Upper San Marcos River WS SCS Site 3 serves as a reliable barrier against flooding, showcasing the importance of strategic infrastructure in safeguarding water resources and communities in the face of climate variability.
Year Completed |
1991 |
Dam Length |
988 |
Dam Height |
60 |
River Or Stream |
SINK CREEK |
Primary Dam Type |
Earth |
Surface Area |
20 |
Hydraulic Height |
60 |
Drainage Area |
5.6 |
Nid Storage |
4323 |
Structural Height |
60 |
Outlet Gates |
Slide (sluice gate) - 1, Uncontrolled - 2 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
60 |
San Marcos Rv At San Marcos
|
82cfs |
Blanco Rv At San Marcos
|
0cfs |
Blanco Rv Nr Kyle
|
0cfs |
Blanco Rv At Halifax Rch Nr Kyle
|
5cfs |
San Marcos Rv Nr Martindale
|
89cfs |
Blanco Rv At Wimberley
|
8cfs |