The Little Elm and Laterals WS SCS Site 18a Dam, located in Collin County, Texas, serves as a vital flood risk reduction structure along the TR-Little Elm Creek.
Wind
Humidity
Built in 1970 by the USDA NRCS, this earth dam stands at a height of 38 feet and stretches 1446 feet in length. With a storage capacity of 779 acre-feet, it provides essential flood protection for the surrounding area.
Managed by the local government and regulated by the Texas Commission on Environmental Quality (TCEQ), the dam is regularly inspected to ensure its structural integrity and overall condition. Despite being classified as fair in its last assessment in 2015, the dam has a moderate risk rating of 3 due to its age and potential hazards. The spillway width of 102 feet allows for controlled water release during periods of high discharge, reducing the risk of overflow and downstream flooding.
With a history of modifications in 2008 and a designated emergency action plan, the Little Elm and Laterals WS SCS Site 18a Dam remains a crucial piece of infrastructure for flood management in the region. Its strategic design and maintenance efforts underscore the importance of proactive water resource management in mitigating climate-related risks and protecting communities from potential disasters.
Years Modified |
2008 - Other |
Year Completed |
1970 |
Dam Length |
1446 |
Dam Height |
38 |
River Or Stream |
TR-LITTLE ELM CREEK |
Primary Dam Type |
Earth |
Surface Area |
13 |
Hydraulic Height |
38 |
Drainage Area |
1.05 |
Nid Storage |
779 |
Structural Height |
38 |
Outlet Gates |
Slide (sluice gate) - 1, Uncontrolled - 2 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
38 |