Bellevue Lake Dam
Bellevue Lake Dam is a gravity dam located in New Castle County, Delaware, built in 1933. It carries a High hazard potential classification.
About Bellevue Lake Dam
The primary purpose of Bellevue Lake 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 Stoney Creek near Holly Oak.
The dam stands 15 feet tall and stretches 330 feet across, creates a reservoir covering 14 acres, has a maximum storage capacity of 145 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1933, the structure is well-established, with more than 75 years of service.
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.
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 | Holly Oak |
| River/Stream | Stoney Creek |
| Coordinates | 39.78018, -75.48702 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 330 ft |
| Year Completed | 1933 (93 years old) |
Storage & Hydraulics
| NID Storage | 145 acre-ft |
| Max Storage | 145 acre-ft |
| Normal Storage | 125 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 93 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Water Supply |
| Owner | UNIITED WATER DELAWARE |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Not Rated |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | DE00011 |
| Federal ID | DE00011 |
| More Info | State Dam Safety Program |