East Branch Dam, also known as East Branch-Clarion River Lake, is a federal-owned structure located in Johnsonburg, Pennsylvania.
Wind
Humidity
Completed in 1952 by the US Army Corps of Engineers, this earth-type dam stands at a structural height of 184 feet and spans 1725 feet across the Clarion River. With a maximum storage capacity of 103,000 acre-feet and a surface area of 1160 acres, the dam primarily serves the purpose of flood risk reduction while also supporting fish and wildlife habitats, recreation, and other purposes.
Despite its high hazard potential, East Branch Dam is equipped with an uncontrolled spillway and eight slide gates for water release and management. The US Army Corps of Engineers actively manages the dam-related flood risks through regular inspections, maintenance, and engagement with local emergency managers and the public. The dam's emergency action plan, updated regularly, ensures preparedness and response readiness in case of a dam-related emergency. While the dam faces inherent risks during severe weather events, its risk management measures prioritize safety, risk reduction, and community awareness to safeguard against potential flooding incidents.
Year Completed |
1952 |
Dam Length |
1725 |
River Or Stream |
CLARION RIVER |
Primary Dam Type |
Earth |
Surface Area |
1160 |
Hydraulic Height |
173 |
Drainage Area |
72 |
Nid Storage |
103000 |
Structural Height |
184 |
Outlet Gates |
Slide (sluice gate) - 8 |
Hazard Potential |
High |
Foundations |
Rock |
Nid Height |
184 |
| Location | Reservations | Toilets |
|---|---|---|
East Branch Lake
|
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Twin Lakes Rec Area
|
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Red Mill
|