Lockett Reservoir Reservoir Report
Nearby: Pole Creek Morrison Dam
Last Updated: December 13, 2025
Lockett Reservoir, located in Malheur, Oregon, is a private-owned Earth dam constructed in 1917 primarily for irrigation purposes.
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Summary
The reservoir has a capacity of 44 acre-feet and covers a surface area of 4.45 acres, serving as a vital water resource for the surrounding area. Situated on Gum Creek, the dam stands at 25 feet in height with a hydraulic height of 22 feet, ensuring a steady supply of water for agricultural needs.
Despite its age, Lockett Reservoir boasts a low hazard potential and is currently not rated for its condition assessment. The outlet gates are designed as Needle gates, providing controlled water release when needed. The reservoir's location in a remote area with no downstream settlements minimizes the potential risks associated with dam failure. While the dam has not been inspected recently, it is regulated by the Oregon Water Resources Department, ensuring compliance with state permitting, inspection, and enforcement requirements.
Overall, Lockett Reservoir serves as a crucial infrastructure for irrigation in the region, supporting agricultural activities with its reliable water supply. Its historic significance as a water management structure reflects the importance of sustainable water resource management in Oregon. The reservoir's design, coupled with state regulation and oversight, highlights a commitment to ensuring the safety and efficiency of water storage and distribution for the community's benefit.
Year Completed |
1917 |
Dam Length |
345 |
Dam Height |
25 |
River Or Stream |
GUM CREEK |
Primary Dam Type |
Earth |
Surface Area |
4.45 |
Hydraulic Height |
22 |
Drainage Area |
2.23 |
Nid Storage |
44 |
Structural Height |
25 |
Outlet Gates |
Needle |
Hazard Potential |
Low |
Nid Height |
25 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Malheur River Below Nevada Dam Near Vale Or
|
109cfs |
Snake River At Weiser Id
|
10700cfs |
Payette River Nr Payette Id
|
1970cfs |
North Fork Malheur River At Beulah Or
|
1cfs |
Snake River At Nyssa Or
|
7810cfs |
Crane Creek At Mouth Nr Weiser Id
|
6cfs |
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.
Lockett Reservoir