Little Seneca Dam, located in Germantown, Maryland, is a critical piece of infrastructure managed by the local government for water supply and flood risk reduction purposes.
Wind
Humidity
Built in 1984 by Black and Veatch, this earth dam stands at a height of 99 feet and stretches 628 feet in length, holding a maximum storage capacity of 24,185 acre-feet of water from the Little Seneca Creek. The dam's spillway, with a width of 340 feet, is uncontrolled, allowing for the release of excess water during periods of high discharge.
Despite being classified as having a high hazard potential, the dam is currently in fair condition, as assessed in April 2021. Regular inspections, with the last one conducted in November 2021, ensure the safety and integrity of the structure. The dam's emergency action plan (EAP) status and risk management measures are not specified in the data, but its moderate risk assessment indicates the need for vigilant monitoring and maintenance to mitigate any potential risks. Little Seneca Dam plays a vital role in safeguarding water resources and communities downstream, highlighting the importance of ongoing regulatory oversight and maintenance efforts to ensure its long-term functionality.
Year Completed |
1984 |
Dam Length |
628 |
Dam Height |
99 |
River Or Stream |
Little Seneca Creek |
Primary Dam Type |
Earth |
Surface Area |
505 |
Drainage Area |
20.8 |
Nid Storage |
24185 |
Outlet Gates |
Slide (sluice gate) - 0 |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
99 |
Seneca Creek At Dawsonville
|
74cfs |
Bennett Creek At Park Mills
|
21cfs |
Broad Run Near Leesburg
|
61cfs |
Limestone Branch Near Leesburg
|
1cfs |
Patuxent River Near Unity
|
14cfs |
Cattail Creek Near Glenwood
|
12cfs |
| Location | Reservations | Toilets |
|---|---|---|
Little Bennett Regional Park
|
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Little Bennett Campground
|
||
Turner Farm
|
||
Indiant Flats Campsite
|
||
Horsepen Branch Campsite
|
||
Horsepen Branch
|