Johan Vineyard Reservoir H Reservoir Report
Last Updated: December 13, 2025
Johan Vineyard Reservoir H is a private hydroelectric dam located in Polk, Oregon, with a primary purpose of generating hydroelectric power while also serving flood risk reduction, navigation, and recreation purposes.
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Summary
This Earth-type dam has a height of 35 feet and a storage capacity of 65 acre-feet, making it an essential water resource in the region. The dam is regulated by the Oregon Water Resources Department and undergoes regular inspections to ensure its safety and compliance with state regulations.
Despite its low hazard potential, Johan Vineyard Reservoir H plays a vital role in water management and energy production in the area. The dam is equipped with slide gates for water release and has a designated emergency action plan in place, ensuring preparedness in case of any unforeseen events. While the dam's condition is currently not rated, its significance in providing sustainable energy and water resources underscores the importance of ongoing monitoring and maintenance to ensure its continued operation for the benefit of the community and the environment. With its strategic location and multi-purpose design, Johan Vineyard Reservoir H stands as a testament to the integration of water resource management and climate resilience in the region.
Dam Height |
35 |
Primary Dam Type |
Earth |
Nid Storage |
65 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Low |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Willamette River At Salem
|
35800cfs |
South Yamhill River At Mcminnville
|
8310cfs |
Luckiamute River Near Suver
|
3790cfs |
Zollner Creek Near Mt Angel
|
320cfs |
Abiqua Creek At Silverton
|
74cfs |
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.
Johan Vineyard Reservoir H
Keizer Rapids