Zoglmann Reservoir Reservoir Report
Last Updated: December 13, 2025
Zoglmann Reservoir, located in Harney County, Oregon, is a privately owned earth dam constructed in 1963 primarily for irrigation purposes.
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Summary
The reservoir has a maximum storage capacity of 3000 acre-feet and a normal storage capacity of 2533 acre-feet, serving the agricultural needs of the region. Situated in the Gumboot Canyon along the Gumboot Creek, the reservoir covers an area of 228.8 acres and has a drainage area of 25.3 square miles.
With a dam height of 27.7 feet and a hydraulic height of 23 feet, Zoglmann Reservoir is considered to have a low hazard potential. The dam features outlet gates in the form of slide (sluice gate) mechanisms for controlled water release. The last inspection of the reservoir took place in July 2009, with a scheduled inspection frequency of 6 years. While the condition assessment of the dam is listed as "Not Rated," the reservoir is under state regulation and inspection by the Oregon Water Resources Department (OWRD), ensuring compliance with safety standards and enforcement measures.
Water resource and climate enthusiasts can appreciate Zoglmann Reservoir for its role in sustaining agricultural activities in the region and its contribution to water management in the Gumboot Canyon area. The reservoir's strategic location and design highlight the importance of efficient irrigation infrastructure in optimizing water resources for sustainable development. As a key component of the local water supply system, Zoglmann Reservoir showcases the intersection of human intervention and natural hydrological processes in maintaining water security for the community.
Year Completed |
1963 |
Dam Length |
237 |
Dam Height |
27.7 |
River Or Stream |
GUMBOOT CANYON |
Primary Dam Type |
Earth |
Surface Area |
228.8 |
Hydraulic Height |
23 |
Drainage Area |
25.3 |
Nid Storage |
3000 |
Structural Height |
28 |
Outlet Gates |
Slide (sluice gate) |
Hazard Potential |
Low |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
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.
Zoglmann Reservoir