Edgemoor Reservoir Dam
Edgemoor Reservoir Dam is a gravity dam located in New Castle County, Delaware, built in 1908. It carries a High hazard potential classification.
About Edgemoor Reservoir Dam
The primary purpose of Edgemoor Reservoir 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 Uniited Water Delaware (private). It impounds the Turkey Run-os near Edgemoor.
The dam stands 13 feet tall and stretches 1,820 feet across, creates a reservoir covering 0 acres, has a maximum storage capacity of 82 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1908, the structure is over a century old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. The most recent inspection on record was 10/16/2000. That was 25 years ago — unusually long for a high-hazard dam, which typically requires more frequent inspections.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Delaware dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Delaware |
| County | New Castle |
| Nearest City | Edgemoor |
| River/Stream | Turkey Run-os |
| Coordinates | 39.75724, -75.52087 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 1,820 ft |
| Year Completed | 1908 (118 years old) |
Storage & Hydraulics
| NID Storage | 82 acre-ft |
| Max Storage | 82 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Water Supply |
| Owner | UNIITED WATER DELAWARE |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Last Inspection | 10/16/2000 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | DE00012 |
| Federal ID | DE00012 |
| More Info | State Dam Safety Program |