Wageman Reservoir Report
Last Updated: December 13, 2025
Wageman, located in Tenmile, Oregon, is a privately owned earth dam completed in 1971 primarily for irrigation purposes.
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Summary
It stands at 42 feet high, with a maximum storage capacity of 70 acre-feet and a normal storage capacity of 50 acre-feet. The dam spans 500 feet in length and covers a surface area of 3.8 acres, serving the drainage area of 0.2 square miles.
Despite its crucial role in water resource management, Wageman has been flagged with a high hazard potential and poor condition assessment. The dam has a history of state regulation and inspection, with the Oregon Water Resources Department overseeing its permitting, inspection, and enforcement. The most recent inspection took place in November 2021, indicating a need for attention and potential safety improvements to mitigate risks associated with its condition.
Wageman's presence on Ten Mile Creek, a tributary to the larger river system, underscores its significance in the local water infrastructure. Given its outdated infrastructure and high hazard potential, stakeholders and climate enthusiasts may closely monitor updates on its safety measures and risk management strategies to ensure the sustainable utilization of its water resources for irrigation purposes.
Year Completed |
1971 |
Dam Length |
500 |
Dam Height |
40 |
River Or Stream |
TEN MILE CREEK, TRIB TO |
Primary Dam Type |
Earth |
Surface Area |
3.8 |
Hydraulic Height |
38 |
Drainage Area |
0.2 |
Nid Storage |
70 |
Structural Height |
42 |
Hazard Potential |
High |
Nid Height |
42 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
South Umpqua River Near Brockway
|
386cfs |
North Umpqua River At Winchester
|
1480cfs |
Cow Creek Near Riddle
|
86cfs |
West Fork Cow Creek Near Glendale
|
19cfs |
Little Wolf Creek Near Tyee
|
4cfs |
Cow Creek Near Azalea
|
37cfs |
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.
Wageman
Hult Mill