Seneca State Park Dam, also known as Clopper Lake, is a picturesque recreational spot located in Montgomery County, Maryland.
Wind
Humidity
Built in 1975, this earth dam stands at a height of 64 feet and stretches 580 feet in length, creating a serene 90-acre surface area for visitors to enjoy. The dam serves multiple purposes, including flood risk reduction and recreation, making it a vital asset in the area.
Managed by the Maryland Dam Safety agency, Seneca State Park Dam is subject to regular state inspections and enforcement measures to ensure its structural integrity and safety. With a high hazard potential due to its location on Long Draught Branch, the dam is classified as having a fair condition assessment as of June 2020. Despite its moderate risk assessment, the dam continues to be a popular destination for water resource and climate enthusiasts seeking outdoor activities in the Dawsonville area.
As one of the key features in Seneca Creek State Park, visitors can explore the natural beauty of the surrounding area, participate in water-based activities, or simply relax by the peaceful waters of Clopper Lake. With its rich history, stunning views, and important role in flood risk management, Seneca State Park Dam remains a significant landmark for both locals and tourists alike.
Year Completed |
1975 |
Dam Length |
580 |
Dam Height |
64 |
River Or Stream |
Long Draught Branch |
Primary Dam Type |
Earth |
Surface Area |
90 |
Drainage Area |
2.9 |
Nid Storage |
2792 |
Outlet Gates |
Slide (sluice gate) - 0 |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
64 |
Seneca Creek At Dawsonville
|
74cfs |
Broad Run Near Leesburg
|
61cfs |
Difficult Run Near Great Falls
|
12cfs |
Patuxent River Near Unity
|
14cfs |
Hawlings River Near Sandy Spring
|
10cfs |
Bennett Creek At Park Mills
|
21cfs |
| Location | Reservations | Toilets |
|---|---|---|
Little Bennett Regional Park
|
||
Little Bennett Campground
|
||
Swains Lock Hiker-Biker Campsite
|
||
Horsepen Branch Campsite
|
||
Horsepen Branch
|
||
Turner Farm
|