River Street is a concrete dam located in York County, Maine, built in 1870. It carries a Significant hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 17 ft17 ft tall and 410 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About River Street
The primary purpose of River Street is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Sanford (local government). It impounds the Mousam near Sanford.
The dam stands 17 feet tall and stretches 410 feet across, creates a reservoir covering 66 acres, has a maximum storage capacity of 516 acre-feet, and collects water from a drainage area of 39 square miles. Completed in 1870, the structure is one of the older dams in the region, with over a century and a half of service.
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. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 12/20/2016.
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Location
| State | Maine |
| County | York |
| Nearest City | Sanford |
| River/Stream | Mousam |
| Coordinates | 43.45767, -70.78149 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 410 ft |
| Year Completed | 1870 (156 years old) |
Storage & Hydraulics
| NID Storage | 516 acre-ft |
| Max Storage | 516 acre-ft |
| Normal Storage | 240 acre-ft |
| Surface Area | 66 acres |
| Drainage Area | 39 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Sanford |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 12/20/2016 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ME00184 |
| Federal ID | ME00184 |
| More Info | State Dam Safety Program |