Scs-Timber Creek Site-7 Reservoir Report
Last Updated: December 19, 2025
SCS-Timber Creek Site-7, also known as Ralph Hartman Lake, is a state-owned dam located in Beckham County, Oklahoma.
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Summary
Built in 1963 by USDA NRCS, this earth dam stands at a height of 49 feet and serves the primary purpose of flood risk reduction along the TR-Timber Creek. With a storage capacity of 2046 acre-feet and a normal storage of 491 acre-feet, this dam plays a crucial role in protecting the surrounding area from potential flooding events.
Managed by the Oklahoma Water Resources Board, SCS-Timber Creek Site-7 has a significant hazard potential and is rated as having a very high risk level. Despite its fair condition assessment, the dam has a controlled spillway and a single valve outlet gate. The last inspection took place in July 2011, with a scheduled inspection frequency of every 3 years. With a maximum discharge capacity of 5569 cubic feet per second, this dam is designed to withstand high water flow during extreme weather events.
As a key infrastructure for flood risk reduction in the region, SCS-Timber Creek Site-7 plays a crucial role in protecting the local community from potential water-related disasters. With its strategic location and design features, this dam exemplifies the importance of water resource management and climate resilience in safeguarding communities against the impacts of extreme weather events.
Year Completed |
1963 |
Dam Length |
1750 |
Dam Height |
49 |
River Or Stream |
TR-TIMBER CR |
Primary Dam Type |
Earth |
Surface Area |
36 |
Hydraulic Height |
44 |
Nid Storage |
2046 |
Structural Height |
49 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
49 |
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.
Scs-Timber Creek Site-7