Fleets Loop Reservoir Report
Last Updated: December 13, 2025
Located in Union, Oregon, Fleets Loop is a privately owned irrigation dam on the Grande Ronde River that was completed in 1967.
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Summary
With a height of 18 feet and a storage capacity of 246 acre-feet, this earth dam serves the primary purpose of irrigation in the region. The dam has a low hazard potential and has not been rated for its condition assessment.
Although Fleets Loop is regulated by the Oregon Water Resources Department and undergoes regular inspections, its emergency action plan status and risk management measures are currently unknown. The dam features slide gates for outlet control and has a maximum discharge capacity of 40 cubic feet per second. Despite its small drainage area of 0.6 square miles, the dam plays a crucial role in providing water for agricultural activities in the area.
Fleets Loop is a key infrastructure for water resource management in the region, ensuring a stable water supply for irrigation purposes. While the dam has a low hazard potential, its maintenance and emergency preparedness remain important factors for ensuring the safety and effectiveness of its operations. As climate change continues to impact water resources, the role of structures like Fleets Loop in sustainable water management will become increasingly significant for the community and the environment.
Year Completed |
1967 |
Dam Length |
120 |
Dam Height |
18 |
River Or Stream |
GRANDE RONDE RIVER |
Primary Dam Type |
Earth |
Surface Area |
27.5 |
Hydraulic Height |
12 |
Drainage Area |
0.6 |
Nid Storage |
246 |
Structural Height |
18 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Low |
Nid Height |
18 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Minam River Near Minam
|
340cfs |
Meacham Creek At Gibbon
|
444cfs |
Umatilla River Above Meacham Creek
|
266cfs |
Mill Creek Near Walla Walla
|
102cfs |
Grande Ronde River At Troy
|
3000cfs |
Umatilla R At W Reservation Bndy Nr Pendleton
|
573cfs |
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.
Fleets Loop