Scs-Chigley Sandy Creek Site-01 Reservoir Report
Last Updated: December 18, 2025
SCS-Chigley Sandy Creek Site-01, located in Murray County, Oklahoma, is a state-regulated Earth dam designed by the USDA NRCS and completed in 1955 for Flood Risk Reduction along the TR-Chigley Sandy Creek.
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Summary
The dam stands at a height of 28 feet with a hydraulic height of 23 feet and a length of 875 feet, providing a storage capacity of 194 acre-feet. Despite its low hazard potential, the dam has a very high risk assessment rating, indicating the need for careful monitoring and maintenance.
Owned by the state of Oklahoma and regulated by the OWRB, SCS-Chigley Sandy Creek Site-01 features a controlled spillway and a single valve outlet gate for water release. The dam has not been rated for condition assessment, and its last inspection dates back to 1980, with an inspection frequency of 5 years. While the dam serves its primary purpose of Flood Risk Reduction effectively, its risk management measures and emergency action plan are not clearly documented, raising concerns for potential hazards and the need for updated safety protocols.
For water resource and climate enthusiasts, SCS-Chigley Sandy Creek Site-01 presents an intriguing case study of a historic dam in need of modern risk assessment and management practices. With its location in a high-risk area and limited maintenance history, this dam serves as a reminder of the importance of proactive monitoring and emergency preparedness in ensuring the safety and sustainability of our water infrastructure in the face of changing climate conditions.
Year Completed |
1955 |
Dam Length |
875 |
Dam Height |
28 |
River Or Stream |
TR-CHIGLEY SANDY CREEK |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
23 |
Nid Storage |
194 |
Structural Height |
28 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Rock Creek At Sulphur
|
8cfs |
Washita River Near Pauls Valley
|
327cfs |
Washita River Near Dickson
|
319cfs |
Pennington Creek Near Reagan
|
57cfs |
Blue River Near Connerville
|
49cfs |
Walnut Creek At Purcell
|
28cfs |
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.
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Scs-Chigley Sandy Creek Site-01