Upper Little Falls
Upper Little Falls is a concrete dam located in Washington County, Maine, built in 1950. It carries a Significant hazard potential classification and has a poor condition assessment.
About Upper Little Falls
The primary purpose of Upper Little Falls is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Ifw/state Of Maine (state). It impounds the Pennamaquan.
The dam stands 20 feet tall and stretches 120 feet across, creates a reservoir covering 1,209 acres, has a maximum storage capacity of 5,600 acre-feet, and collects water from a drainage area of 40 square miles. Completed in 1950, the structure is well-established, with more than 75 years 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 poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 08/07/2025.
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Location
| State | Maine |
| County | Washington |
| River/Stream | Pennamaquan |
| Coordinates | 44.98507, -67.19737 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 120 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 5,600 acre-ft |
| Max Storage | 5,600 acre-ft |
| Normal Storage | 5,600 acre-ft |
| Surface Area | 1,209 acres |
| Drainage Area | 40 sq mi |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | IFW/State of Maine |
| Owner Type | State |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 08/07/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | ME00396 |
| Federal ID | ME00396 |
| More Info | State Dam Safety Program |