Long Hollow Dam
Long Hollow Dam is an other dam located in Washington County, Maryland, built in 1940. It carries a Low hazard potential classification and has a poor condition assessment.
About Long Hollow Dam
The primary purpose of Long Hollow Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Md Dnr-public Lands, Engineering & Constr-western (state). It impounds the Potomac River-tr.
The dam stands 25 feet tall and stretches 200 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 16 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1940, the structure is well-established, with more than 75 years of service.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 05/10/2016.
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Location
| State | Maryland |
| County | Washington |
| Nearest City | None |
| River/Stream | Potomac River-tr |
| Coordinates | 39.62609, -78.29366 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 200 ft |
| Year Completed | 1940 (86 years old) |
Storage & Hydraulics
| NID Storage | 16 acre-ft |
| Max Storage | 16 acre-ft |
| Normal Storage | 16 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 200 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | MD DNR-Public Lands, Engineering & Constr-Western |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 05/10/2016 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MD00283 |
| Federal ID | MD00283 |
| More Info | State Dam Safety Program |