Clemens Reservoir Reservoir Report
Nearby: Willow Reservoir Willow-Skull Dam
Last Updated: December 13, 2025
Clemens Reservoir, also known as Yellowjacket Reservoir, is a picturesque water body located in Harney County, Oregon.
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Summary
Managed by the state and regulated by the Oregon Water Resources Department, this reservoir is a popular spot for recreational activities such as boating, fishing, and wildlife watching. With a dam height of 35 feet and a storage capacity of 450 acre-feet, Clemens Reservoir offers a tranquil escape for water resource and climate enthusiasts.
Constructed in 1967, the reservoir spans 603 feet in length and covers a surface area of 33.4 acres, with a drainage area of 8.4 square miles. The dam, primarily designed for recreational purposes, features an earth structure and a slide-type outlet gate. Despite its low hazard potential, the reservoir is inspected every six years to ensure its safety and integrity. Located along Yellowjacket Creek, Clemens Reservoir serves as a vital water resource for the surrounding area, supporting diverse ecosystems and providing a scenic backdrop for outdoor adventures.
In the care of the state and monitored for compliance with regulatory standards, Clemens Reservoir represents a harmonious balance between human recreation and environmental stewardship. Whether you're interested in exploring the waterways of Oregon or studying the intersection of water management and climate change, this reservoir offers a fascinating case study in sustainable reservoir management and the importance of preserving our natural resources for future generations.
Year Completed |
1967 |
Dam Length |
603 |
Dam Height |
35 |
River Or Stream |
YELLOWJACKET CREEK |
Primary Dam Type |
Earth |
Surface Area |
33.4 |
Hydraulic Height |
33 |
Drainage Area |
8.4 |
Nid Storage |
450 |
Structural Height |
41 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Low |
Nid Height |
41 |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Yellowjacket
|
||
Emigrant
|
||
Emigrant Campground
|
Clemens Reservoir