Mccoy Reservoir Reservoir Report
Nearby: Simms Reservoir Bryant Mt. Dam
Last Updated: December 5, 2025
McCoy Reservoir, located in Malin, Oregon, is a private-owned water resource managed for irrigation purposes.
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Summary
Built in 1915, this Earth dam stands at a height of 15 feet and has a storage capacity of 1,245 acre-feet. The reservoir covers a surface area of 117 acres and is fed by Mills Creek, serving as a vital source of water for agricultural activities in the region.
Despite its age, McCoy Reservoir remains in good condition with a low hazard potential and a scheduled inspection frequency of 6 years. The dam features a slide gate as its outlet structure and has a maximum discharge capacity of 333 cubic feet per second. While not currently rated for its condition, McCoy Reservoir plays a critical role in water management and irrigation practices in Klamath County, Oregon.
With its historical significance and operational efficiency, McCoy Reservoir stands as a testament to the importance of sustainable water resource management in the face of climate challenges. As a regulated and inspected structure, it continues to provide essential water supply for agricultural needs while maintaining a low-risk profile in terms of potential hazards.
Year Completed |
1915 |
Dam Length |
300 |
Dam Height |
15 |
River Or Stream |
MILLS CREEK |
Primary Dam Type |
Earth |
Surface Area |
117 |
Hydraulic Height |
15 |
Drainage Area |
4.2 |
Nid Storage |
1245 |
Structural Height |
24 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Low |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
North Canal At Highway 97
|
104cfs |
Link River At Klamath Falls
|
928cfs |
Ady Canal At Highway 97
|
39cfs |
Klamath Straits Drain Near Worden
|
1cfs |
Klamath River At Keno
|
698cfs |
Klamath River Blw John C.Boyle Pwrplnt
|
902cfs |
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.
Mccoy Reservoir