Muhs Quarry Dam Reservoir Report
Nearby: Patsys Pond Oregon Pride Nursery Dam
Last Updated: December 13, 2025
Muhs Quarry Dam, located in Yamhill, Oregon, serves as a crucial water supply structure with a storage capacity of 202.5 acre-feet.
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Summary
This private dam, standing at a height of 40 feet on a rock foundation, is regulated by the Oregon Water Resources Department and undergoes regular inspections and enforcement measures to ensure its safety and functionality. With its primary purpose being water supply, Muhs Quarry Dam plays a vital role in managing water resources in the region.
Despite its significant hazard potential, Muhs Quarry Dam has a moderate risk assessment rating. While not currently rated for its condition, the dam is inspected every three years to monitor its integrity. The spillway type is classified as uncontrolled, indicating the need for careful management during times of high water flow. The dam's risk management measures and emergency preparedness plans are areas that could potentially be improved to enhance the overall safety and resilience of the structure.
With Congresswoman Suzanne Bonamici representing the district, stakeholders and enthusiasts in water resource and climate management can monitor Muhs Quarry Dam as an essential component of the local water infrastructure. As a privately owned dam with state jurisdiction, its role in supplying water to the community highlights the importance of sustainable water resource management practices. The dam's location on the unnamed tributary south of Yamhill River underscores its significance in the region's water supply network, making it a key focal point for ongoing monitoring and maintenance efforts.
Dam Height |
40 |
River Or Stream |
UNNAMED; TRIB SOUTH YAMHILL |
Primary Dam Type |
Other |
Nid Storage |
202.5 |
Hazard Potential |
Significant |
Foundations |
Rock |
Nid Height |
40 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
South Yamhill River At Mcminnville
|
8310cfs |
Willamette River At Newberg
|
52600cfs |
Tucca Creek Near Blaine
|
123cfs |
Tualatin River Near Dilley
|
1130cfs |
Willamette River At Salem
|
35800cfs |
Pudding River Near Woodburn
|
4380cfs |
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.
Muhs Quarry Dam
Rm 47 To Rm 52 (Upper End Of Nestucca River)
County Boudary (Confluence With Wsr) To Rm 47 (Lower End Mcguire Reservoir)