Selman #1 Reservoir Report
Nearby: Selman Gp1 Champ #2
Last Updated: December 21, 2025
Selman #1 is a private earth dam located on Sand Creek in Harper, Oklahoma.
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Summary
Built in 1963 by the USDA NRCS, this structure stands at 24 feet high and spans 390 feet in length, with a storage capacity of 55 acre-feet. The dam serves a primary purpose that is not specified, but its low hazard potential and moderate risk assessment make it an important asset for managing water resources in the area.
Despite being unregulated by state agencies and lacking inspections or maintenance records, Selman #1 remains in a "Not Rated" condition assessment. The spillway width of 36 feet and uncontrolled spillway type suggest a design that can effectively handle overflow events. With its strategic location in the Tulsa District of the USACE, Selman #1 plays a key role in water management and flood control efforts in the region. For water resource and climate enthusiasts, this dam serves as a notable example of private infrastructure contributing to overall water security and environmental sustainability.
Year Completed |
1963 |
Dam Length |
390 |
Dam Height |
24 |
River Or Stream |
SAND CREEK |
Primary Dam Type |
Earth |
Surface Area |
11 |
Hydraulic Height |
24 |
Drainage Area |
0.39 |
Nid Storage |
55 |
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.
Selman #1