Chevron Clearwater Reservoir Report
Last Updated: December 13, 2025
Chevron Clearwater, located in Rock Springs, Wyoming, is a privately owned earth dam completed in 1986 with a primary purpose of water storage on the Raj.
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Summary
Draw river. This dam stands at 50 feet in height with a hydraulic height of 44 feet, contributing to a storage capacity of 156 acre-feet and a drainage area of 0.9 square miles. Despite its age, the dam is in fair condition with a low hazard potential and a moderate risk assessment rating.
With a spillway width of 5 feet and two valve outlet gates, Chevron Clearwater is equipped to handle a maximum discharge of 102 cubic feet per second. The dam's design by John E. Garlanger ensures structural integrity through stone core and soil foundation materials, providing stability for its 1100-foot length. While the dam has not undergone significant modifications since its completion, it is subject to regular inspections every five years, with the last assessment conducted in October 2017.
In the event of an emergency, Chevron Clearwater has an established Emergency Action Plan (EAP) and emergency contacts, though the specifics of these measures are not readily available. Despite its relatively low hazard potential, the dam's risk assessment remains moderate, indicating a need for continued monitoring and risk management measures. As a crucial component of water resource management in Sweetwater County, Wyoming, Chevron Clearwater serves as a testament to the importance of maintaining and assessing the safety of our water infrastructure in the face of changing climate conditions.
Year Completed |
1986 |
Dam Length |
1100 |
Dam Height |
50 |
River Or Stream |
RAJ. DRAW |
Primary Dam Type |
Earth |
Surface Area |
9 |
Hydraulic Height |
44 |
Drainage Area |
0.9 |
Nid Storage |
156 |
Structural Height |
50 |
Outlet Gates |
Valve - 2 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
50 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Green River Near Green River
|
884cfs |
Blacks Fork Near Little America
|
14cfs |
Pacific Creek Near Farson
|
3cfs |
Henrys Fork Near Manila
|
49cfs |
Green River Near Greendale
|
847cfs |
Big Sandy River Near Farson
|
13cfs |
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.
Chevron Clearwater