Scs-Chigley Sandy Creek Site-03 Reservoir Report
Last Updated: December 11, 2025
SCS-Chigley Sandy Creek Site-03, located in Garvin County, Oklahoma, is a state-regulated earth dam designed by the USDA NRCS in 1955 for flood risk reduction along the TR-WEST BR CHIGLEY SANDY CR.
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Summary
The dam has a height of 28 feet and a storage capacity of 348 acre-feet, with a maximum discharge of 1110 cubic feet per second. The dam's spillway is controlled, with a width of 1 foot, and it is equipped with a single valve outlet gate.
Despite its age, SCS-Chigley Sandy Creek Site-03 has a low hazard potential and a very high risk assessment rating of 1. The dam's condition has not been rated, and the last inspection took place in 1980. While the dam has not been modified over the years, it is inspected every 5 years for maintenance and safety purposes. The dam's emergency action plan status and risk management measures are currently not specified, but it meets state regulatory requirements for permitting, inspection, and enforcement.
Water resource and climate enthusiasts interested in SCS-Chigley Sandy Creek Site-03 can appreciate the dam's significant role in flood risk reduction for the local community. The dam's design and construction by the Natural Resources Conservation Service demonstrate a commitment to sustainable water management practices. With a controlled spillway and valve outlet gate, the dam is equipped to handle potential flooding events effectively. Ongoing inspections and compliance with state regulations ensure the safety and functionality of this essential water infrastructure in Garvin County, Oklahoma.
Year Completed |
1955 |
Dam Length |
1030 |
Dam Height |
28 |
River Or Stream |
TR-WEST BR CHIGLEY SANDY CR. |
Primary Dam Type |
Earth |
Surface Area |
18 |
Hydraulic Height |
23 |
Nid Storage |
348 |
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
|
335cfs |
Pennington Creek Near Reagan
|
7cfs |
Washita River Near Dickson
|
327cfs |
Walnut Creek At Purcell
|
28cfs |
Canadian River At Purcell
|
204cfs |
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.
R.C. Longmire Lake
Central - Chickasaw National Rec Area
Rock Creek - Chickasaw National Rec Area
Central Campground
Cold Springs - Chickasaw National Rec Area
Pauls Valley City Lake
Scs-Chigley Sandy Creek Site-03