Bernsens 810 Reservoir Dam No 1 Reservoir Report
Last Updated: December 14, 2025
Bernsens 810 Reservoir Dam No 1, located in Mesa, Franklin County, Washington, is a state-owned earth dam completed in 1979 primarily for irrigation purposes.
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Summary
With a hydraulic and structural height of 15 feet and a length of 140 feet, the dam has a storage capacity of 165 acre-feet and covers a surface area of 8.5 acres. The dam is regulated, permitted, inspected, and enforced by the Washington Department of Ecology, ensuring its safety and compliance with state regulations. Despite being classified as having a low hazard potential, the dam's condition assessment is currently not rated.
The dam's offstream location along the unnamed river or stream, in S34 T13 R30E, makes it an important water resource infrastructure in the region, serving the irrigation needs of the surrounding agricultural lands. The dam is situated within the Walla Walla District of the US Army Corps of Engineers and falls under Congressional District 04, represented by Dan Newhouse. While the dam does not have a spillway or outlet gates listed, it meets the guidelines for emergency action preparedness, although specific details regarding emergency contacts, inundation maps, and risk management measures are not provided.
Overall, Bernsens 810 Reservoir Dam No 1 is a vital component of the water resource infrastructure in Franklin County, Washington. With its low hazard potential and state-regulated status, the dam plays a crucial role in supporting irrigation activities in the region. Its completion in 1979 and ongoing state oversight ensure its continued operation and contribution to the local agricultural economy.
Year Completed |
1979 |
Dam Length |
140 |
River Or Stream |
Offstream |
Primary Dam Type |
Earth |
Surface Area |
8.5 |
Hydraulic Height |
15 |
Drainage Area |
0.03 |
Nid Storage |
165 |
Structural Height |
15 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
15 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yakima River At Kiona
|
27000cfs |
Columbia River Below Priest Rapids Dam
|
123000cfs |
Walla Walla River Near Touchet
|
1330cfs |
Crab Creek Near Beverly
|
160cfs |
Palouse River At Hooper
|
574cfs |
Crab Creek Near Moses Lake
|
28cfs |
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.
Bernsens 810 Reservoir Dam No 1