Richey Reservoir Report
Nearby: C.H. Smith Settling Basin
Last Updated: December 15, 2025
Richey is a privately owned earth dam located in Cokeville, Wyoming, along Twin Creek.
°F
°F
mph
Wind
%
Humidity
Summary
Built in 1917 for irrigation purposes, this structure stands at 25 feet high and stretches 843 feet in length, with a storage capacity of 194 acre-feet. Despite its age, Richey has a low hazard potential but is currently assessed as being in poor condition, last inspected in July 2018. The dam features an uncontrolled spillway with a width of 20 feet and an outlet gate consisting of a single valve.
While Richey poses a moderate risk rating of 3, it remains under state jurisdiction and regulation by the Wyoming State Engineer's Office. Although the dam has not undergone significant modifications in recent years, it is subject to regular inspections every five years. As a crucial water resource for the area, maintaining the structural integrity of Richey is essential for ensuring continued irrigation supply and protection against potential hazards. Enthusiasts interested in water resource management and climate adaptation efforts may find Richey's historical significance and current condition intriguing for further study and monitoring.
Year Completed |
1917 |
Dam Length |
843 |
Dam Height |
25 |
River Or Stream |
TWIN CREEK |
Primary Dam Type |
Earth |
Surface Area |
27 |
Hydraulic Height |
20 |
Nid Storage |
194 |
Structural Height |
25 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
25 |
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.
Richey