Dulles Airport Dam
Dulles Airport Dam is an earth dam located in Loudoun County, Virginia. It carries a Significant hazard potential classification.
About Dulles Airport Dam
The primary purpose of Dulles Airport Dam is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Metro-washington Airport Authority (public utility). It impounds the Tr-horsepen Run.
The dam stands 11 feet tall and stretches 650 feet across, creates a reservoir covering 28 acres, has a maximum storage capacity of 259 acre-feet, and collects water from a drainage area of 1 square miles.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam.
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Location
| State | Virginia |
| County | Loudoun |
| River/Stream | Tr-horsepen Run |
| Coordinates | 38.96300, -77.44470 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 650 ft |
Storage & Hydraulics
| NID Storage | 259 acre-ft |
| Max Storage | 259 acre-ft |
| Normal Storage | 102 acre-ft |
| Surface Area | 28 acres |
| Drainage Area | 1 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Metro-Washington Airport Authority |
| Owner Type | Public Utility |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | VA107008 |
| Federal ID | VA107008 |
| More Info | State Dam Safety Program |