Wells Reservoir Report
Nearby: Chelan Chief Joseph Dam
Last Updated: January 7, 2026
Wells, a hydroelectric facility located in Chelan Falls, Washington, harnesses the power of the Columbia River to generate electricity and support various purposes such as fish and wildlife ponds, irrigation, and recreation.
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Summary
Built in 1968 by the Bechtel Corporation, this gravity dam stands at 160 feet tall with a storage capacity of 500,000 acre-feet. Its controlled spillway and 11 other controlled outlet gates ensure the safe release of water, while its high hazard potential and very high risk assessment highlight the importance of effective risk management measures.
With a structural height of 160 feet and a length of 4,300 feet, Wells dam serves as a key player in the region's water resource management and climate resilience efforts. Managed by the Federal Energy Regulatory Commission, the dam plays a crucial role in regulating the flow of the Columbia River, supporting both local ecosystems and communities. Despite its high hazard potential, Wells dam continues to operate efficiently, providing clean energy and water resources to the surrounding areas while maintaining a strong commitment to safety and environmental stewardship.
As water resource and climate enthusiasts continue to monitor and assess the impacts of climate change on water infrastructure, facilities like Wells dam stand as vital assets in ensuring sustainable water management practices. The collaboration between federal agencies, local stakeholders, and the public utility sector is essential in safeguarding these critical resources for future generations. Wells dam's storied history and ongoing contributions underscore the importance of innovative solutions and strategic planning in addressing the challenges of a changing climate.
Year Completed |
1968 |
Dam Length |
4300 |
Dam Height |
160 |
River Or Stream |
Columbia River |
Primary Dam Type |
Gravity |
Surface Area |
9700 |
Hydraulic Height |
144 |
Drainage Area |
85300 |
Nid Storage |
500000 |
Structural Height |
160 |
Outlet Gates |
Other Controlled - 11 |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
160 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Methow River Near Pateros
|
1450cfs |
Chelan River At Chelan
|
1150cfs |
Okanogan River At Malott
|
2410cfs |
Entiat River Near Entiat
|
397cfs |
Entiat River Near Ardenvoir
|
284cfs |
Mad River At Ardenvoir
|
83cfs |
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.
Wells
Lake Chelan At Chelan
Lake Chelan At Purple Point At Stehekin