Clearwater No 2 Forebay Reservoir Report

Last Updated: December 5, 2025

Clearwater No 2 Forebay is a privately-owned hydroelectric facility located in Douglas County, Oregon.


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Summary

Built in 1953, this earth dam structure stands at 13 feet high and spans 4100 feet in length. With a maximum storage capacity of 76 acre-feet and a normal storage level of 71 acre-feet, this facility plays a crucial role in generating hydroelectric power in the region.

Managed by the Federal Energy Regulatory Commission, Clearwater No 2 Forebay has a spillway width of 100 feet and a hazard potential rated as high. Despite its age, the condition assessment of the dam is currently listed as "Not Available." The emergency action plan was last revised in April 2021, and the risk assessment for the facility is categorized as moderate. With its location in the Clearwater No. 2 Canal and close oversight by federal agencies, this dam serves as a key component in the region's water resource infrastructure.

Water resource and climate enthusiasts will be intrigued by the structural details and operational significance of Clearwater No 2 Forebay. As a key hydroelectric facility in Oregon, this dam's impact on the surrounding environment and water management practices is substantial. With ongoing federal oversight and risk management measures in place, Clearwater No 2 Forebay continues to play a vital role in the region's energy production and water resource management efforts.

Year Completed

1953

Dam Length

4100

Dam Height

13

River Or Stream

Clearwater No. 2 Canal

Primary Dam Type

Earth

Surface Area

8.6

Hydraulic Height

10

Nid Storage

76

Structural Height

13

Hazard Potential

High

Foundations

Soil

Nid Height

13
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.