Westbrook Dam Reservoir Report
Last Updated: December 13, 2025
Westbrook Dam, located in Marion County, Oregon, is a private-owned structure that serves as a fish and wildlife pond.
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Summary
With a dam height of 25 feet and a storage capacity of 141.2 acre-feet, the primary purpose of the dam is to support the local ecosystem and provide a habitat for diverse aquatic species. This earth-type dam is regulated by the Oregon Water Resources Department, ensuring that it meets state requirements for safety and environmental protection.
Despite its low hazard potential, Westbrook Dam is inspected every 6 years to assess its condition and ensure its continued functionality. The dam features a slide (sluice gate) outlet gate and is situated on Weaver Gulch, which is a tributary of Miller Creek. The surrounding area is not densely populated, reducing the risk of significant damage in the event of a breach. Overall, Westbrook Dam plays a crucial role in supporting wildlife and maintaining ecological balance in the region.
Dam Height |
25 |
River Or Stream |
WEAVER GULCH, TRIB/MILLER CREEK |
Primary Dam Type |
Earth |
Nid Storage |
141.2 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Low |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Santiam River At Jefferson
|
13800cfs |
North Santiam River Near Jefferson
|
7220cfs |
Luckiamute River Near Suver
|
3790cfs |
Willamette River At Salem
|
35800cfs |
Willamette River At Albany
|
13800cfs |
Thomas Creek Near Scio
|
743cfs |
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.
Westbrook Dam
Santiam Rest Area (Old Ramp)