Summary
Constructed in 1924, this masonry dam stands at a height of 27.6 feet and spans 343 feet in length, with a storage capacity of 600 acre-feet and a maximum discharge rate of 2460 cubic feet per second. The dam serves multiple purposes, including hydroelectric power generation and recreation, and is regulated by the Federal Energy Regulatory Commission.
Situated on the Messalonskee Stream within the Kennebec County, Union Gas plays a vital role in water resource management and climate resilience in the region. Despite its low hazard potential, the dam is subject to regular inspections and emergency preparedness measures to ensure its safe operation. With a very high risk assessment rating, stakeholders are actively involved in risk management strategies to mitigate potential threats and safeguard the surrounding community and environment.
As a significant infrastructure for water resource management and renewable energy production, Union Gas highlights the importance of maintaining and monitoring dams for sustainable development. With its historical significance and modern-day contribution to the local economy, this hydroelectric facility serves as a model for balancing environmental conservation with energy needs. Moving forward, continued collaboration between stakeholders and regulatory agencies will be essential in ensuring the long-term resilience and effectiveness of Union Gas in a changing climate.
Year Completed |
1924 |
Dam Length |
343 |
Dam Height |
27.6 |
River Or Stream |
Messalonskee Stream |
Primary Dam Type |
Masonry |
Surface Area |
25 |
Drainage Area |
207 |
Nid Storage |
600 |
Outlet Gates |
Slide (sluice gate) - 2 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Union Gas
Belgrade Avenue 18, Oakland