Dober Reservoir Reservoir Report
Last Updated: December 13, 2025
Dober Reservoir, located in Orenco, Oregon, is a privately owned water resource managed by the Natural Resources Conservation Service.
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Summary
Built in 1954 for irrigation purposes, this earth dam stands at a height of 23.5 feet and has a storage capacity of 106 acre-feet, with a maximum discharge of 70 cubic feet per second. The reservoir spans an area of 12.25 acres and is fed by Davis Creek, serving as a vital source of water for the surrounding region.
Despite its significant hazard potential, Dober Reservoir is regularly inspected and regulated by the Oregon Water Resources Department to ensure its structural integrity and safety. The dam features a slide gate outlet for water management and has not been rated for its current condition. The last inspection took place in November 2020, with a frequency of every three years to monitor any potential risks or issues. As a key component of the local water infrastructure, Dober Reservoir plays a crucial role in supporting agricultural activities and water supply in the region.
With its strategic location and essential role in irrigation, Dober Reservoir serves as a cornerstone for water resource management in Washington County, Oregon. As climate change continues to impact water availability and usage patterns, the reservoir's efficient operation and maintenance are crucial for ensuring sustainable water supply for agricultural and community needs. Enthusiasts of water resources and climate resilience will find Dober Reservoir to be a fascinating example of how man-made structures can contribute to environmental sustainability and resource management in a changing climate.
Year Completed |
1954 |
Dam Length |
430 |
Dam Height |
23 |
River Or Stream |
DAVIS CREEK |
Primary Dam Type |
Earth |
Surface Area |
12.25 |
Hydraulic Height |
21 |
Drainage Area |
1.33 |
Nid Storage |
106 |
Structural Height |
23.5 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Significant |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Tualatin River Near Dilley
|
1360cfs |
Willamette River At Newberg
|
64600cfs |
Fanno Creek At Durham
|
49cfs |
Fanno Creek At 56th Ave
|
4cfs |
East Fork Dairy Creek Near Meacham Corner
|
21cfs |
Tryon Creek Blw Nettle Creek
|
15cfs |
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.
Dober Reservoir