Riley Dam Reservoir Report
Last Updated: December 6, 2025
Riley Dam, located in Hemphill, Texas, along the TR-Washita River, was completed in 1966 by the USDA NRCS.
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Summary
As a private dam with a primary purpose classified as "Other," Riley Dam stands at a height of 20 feet and has a length of 365 feet. While it does not have a spillway, it does feature one outlet gate. The dam has a storage capacity of 63 acre-feet, with a normal storage level of 51 acre-feet.
Despite its age, Riley Dam's condition is currently not rated, with a high risk assessment of 2 out of 3. The dam has not been inspected recently, and its hazard potential is listed as "Not Available." While it is not under state regulation, it does have state permitting and inspection requirements in place. The dam poses a potential risk, given its condition assessment and lack of recent inspection data, making it a point of interest for water resource and climate enthusiasts looking to understand the maintenance and safety challenges faced by private dam owners in the region.
Year Completed |
1966 |
Dam Length |
365 |
Dam Height |
20 |
River Or Stream |
TR-WASHITA RIVER |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
63 |
Structural Height |
20 |
Outlet Gates |
None - 1 |
Hazard Potential |
Not Available |
Foundations |
Unlisted/Unknown |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Sweetwater Ck Nr Kelton
|
3cfs |
Canadian Rv Nr Canadian
|
44cfs |
Sweetwater Creek Near Sweetwater
|
13cfs |
N Fk Red Rv Nr Shamrock
|
3cfs |
Washita River Near Cheyenne
|
8cfs |
Wolf Ck At Lipscomb
|
1cfs |
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.
Riley Dam