Dusky Marsh Dam Reservoir Report
Nearby: Cackler Marsh Dam Taverner Marsh Dam
Last Updated: December 13, 2025
Dusky Marsh Dam, located in Polk, Oregon, is a federal structure managed by the U.S.
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Summary
Fish and Wildlife Service. Built in 1998, the dam serves as a Fish and Wildlife Pond on the Baskett Slough stream. Standing at a height of 10 feet and stretching 3350 feet in length, the dam has a storage capacity of 299 acre-feet and covers an area of 87 acres.
Despite its low hazard potential, the dam is rated as having poor condition as of the last inspection in August 2017. With a very high risk assessment score of 1, there is a need for enhanced risk management measures to ensure the safety and integrity of the structure. The dam's controlled spillway and other controlled outlet gates contribute to its functionality, but ongoing maintenance and inspections are crucial to address the identified issues and ensure its long-term sustainability for the surrounding environment and wildlife.
Year Completed |
1998 |
Dam Length |
3350 |
Dam Height |
10 |
River Or Stream |
Baskett Slough |
Primary Dam Type |
Earth |
Surface Area |
87 |
Hydraulic Height |
10 |
Drainage Area |
8.27 |
Nid Storage |
299 |
Structural Height |
10 |
Outlet Gates |
Other Controlled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Willamette River At Salem
|
43700cfs |
Luckiamute River Near Suver
|
5830cfs |
South Yamhill River At Mcminnville
|
11800cfs |
Santiam River At Jefferson
|
14700cfs |
North Santiam River Near Jefferson
|
6380cfs |
Silver Creek At Silverton
|
52cfs |
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.
Dusky Marsh Dam
Luckiamute River