The Hagerstown Municipal Power Plant Dam, also known as the Mt Aetna Dam, is a privately owned structure located in Washington County, Maryland.
Wind
Humidity
This earth dam was completed in 1950 and serves primarily as a water supply source, with a storage capacity of 60 acre-feet and a normal storage level of 48 acre-feet. The dam spans a length of 250 feet and has a height of 10 feet, impounding water from the Antietam Creek.
Managed by the Maryland Dam Safety agency, the Hagerstown Municipal Power Plant Dam has a low hazard potential and is currently rated in fair condition. The spillway, with a width of 250 feet, is uncontrolled, allowing excess water to safely flow downstream. The dam's drainage area is 176.2 square miles, with a maximum discharge capacity of 775 cubic feet per second. Despite its moderate risk assessment, the dam has not been significantly modified since its construction, highlighting the importance of regular inspections and maintenance to ensure its continued safety and functionality for water resource and climate enthusiasts in the region.
Year Completed |
1950 |
Dam Length |
250 |
Dam Height |
10 |
River Or Stream |
Antietam Creek |
Primary Dam Type |
Earth |
Surface Area |
12 |
Drainage Area |
176.2 |
Nid Storage |
60 |
Outlet Gates |
Needle - 0 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
10 |
Antietam Creek Near Waynesboro
|
38cfs |
Conococheague Creek At Fairview
|
151cfs |
Marsh Run At Grimes
|
6cfs |
Antietam Creek Near Sharpsburg
|
114cfs |
Potomac River At Shepherdstown
|
982cfs |
Catoctin Creek Near Middletown
|
25cfs |