Smyth S Creek Dam Reservoir Report
Nearby: Round Barn Reservoir Mahon Reservoir
Last Updated: December 13, 2025
Smyth S Creek Dam, located in Harney, Oregon, is a private-owned structure primarily used for irrigation purposes.
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Summary
Constructed in 1955, this earth dam stands at a height of 23.5 feet and has a storage capacity of 160 acre-feet. The dam spans 480 feet in length and is situated on Smyth S Creek, with a drainage area of 10.6 square miles.
This low-hazard dam has not been rated for its condition assessment, but it undergoes inspections every 6 years to ensure its integrity and safety. While it has not experienced any modifications over the years, Smyth S Creek Dam plays a crucial role in providing water for irrigation in the surrounding area. Despite being privately owned, the state of Oregon regulates and permits the dam, ensuring that it meets required standards for operation.
With a low hazard potential and no downstream settlements to worry about, Smyth S Creek Dam remains a vital piece of infrastructure for water resource management in the region. Its purpose of irrigation, combined with its consistent storage capacity and structural stability, make it a key asset for the local community and agricultural practices in the area.
Year Completed |
1955 |
Dam Length |
480 |
Dam Height |
23.5 |
River Or Stream |
SMYTH S CREEK |
Primary Dam Type |
Earth |
Surface Area |
26.2 |
Hydraulic Height |
23 |
Drainage Area |
10.6 |
Nid Storage |
160 |
Structural Height |
24 |
Hazard Potential |
Low |
Nid Height |
24 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Smyth S Creek Dam
Mccoy Creek