Rumford Falls Middle Dam Reservoir Report
Nearby: Rumford Falls Upper Dam Mount Zircon
Last Updated: December 18, 2025
Rumford Falls Middle Dam, also known as Middle Dam, is a privately owned structure located in Rumford, Maine along the Androscoggin River.
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Summary
Completed in 1892, this timber crib dam stands at a height of 20 feet and has a length of 428 feet, with a primary purpose of hydroelectric power generation. With a maximum discharge capacity of 75,000 cubic feet per second and a storage capacity of 141 acre-feet, this dam plays a significant role in the region's water resource management.
Managed by the Federal Energy Regulatory Commission, Rumford Falls Middle Dam is classified as having a significant hazard potential and moderate risk level. The dam has an uncontrolled spillway with a width of 328 feet, serving to regulate water flow and prevent flooding downstream. Although the condition assessment is not available, regular inspections are conducted to ensure the safety and integrity of the structure. With its historical significance and vital role in hydroelectric power generation, Rumford Falls Middle Dam stands as a testament to the intersection of water resource management and sustainable energy production in the region.
Water resource and climate enthusiasts will find Rumford Falls Middle Dam to be a fascinating example of early 20th-century engineering and its continued relevance in modern water management practices. The dam's location in the scenic landscape of Oxford County, Maine adds to its appeal, making it a site of interest for those interested in the intersection of human infrastructure with natural resources. As conversations around renewable energy and sustainable water use continue to evolve, Rumford Falls Middle Dam serves as a tangible reminder of the ongoing importance of responsible water resource management in a changing climate.
Year Completed |
1892 |
Dam Length |
428 |
Dam Height |
20 |
River Or Stream |
Androscoggin River |
Primary Dam Type |
Timber Crib |
Surface Area |
21 |
Drainage Area |
2080 |
Nid Storage |
141 |
Hazard Potential |
Significant |
Foundations |
Rock |
Nid Height |
20 |
Seasonal Comparison
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Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Rumford Falls Middle Dam