Long Reservoir Report

Last Updated: December 14, 2025

Long is a privately owned dam located in Wheeler, Oregon, with a low hazard potential and a height of 30 feet.


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Summary

Built in 2003, Long has a storage capacity of 120 acre-feet and is regulated by the Oregon Water Resources Department. This earth dam serves a primary purpose that is not specified, and its condition is currently not rated.

Despite being privately owned, Long is subject to state regulations, inspections, and enforcement. The dam is situated in Congressional District 02 of Oregon and falls under the jurisdiction of the Portland and Walla Walla Districts of the US Army Corps of Engineers. With a latitude of 44.627013 and a longitude of -120.335136, Long plays a role in water resource management in the region.

Water resource and climate enthusiasts may find Long to be an intriguing structure due to its modest size and regulatory oversight. While the dam's specific purposes and associated structures are not detailed, its presence in Wheeler County, Oregon, adds to the diverse landscape of water management infrastructure in the area. As a privately owned entity with state permitting and inspection requirements, Long represents a piece of the larger puzzle of water resource management in the region.

Year Completed

2003

Dam Height

30

Primary Dam Type

Earth

Hydraulic Height

30

Nid Storage

120

Hazard Potential

Low

Nid Height

30
       
Seasonal Comparison

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Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.