G. H. Reservoir Reservoir Report
Nearby: Dana Meadows Stephenson
Last Updated: December 5, 2025
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Summary
H. Reservoir, located in Carbon, Wyoming, is a private water storage facility primarily used for fire protection, stock, and as a small fish pond. Built in 1977, this earth dam stands at a height of 17 feet and has a hydraulic height of 12 feet, with a capacity to hold 165 acre-feet of water in its 38-acre surface area. The reservoir is situated along the Middle Ditch Draw and serves as a crucial resource for flood risk reduction in the region.
Despite its low hazard potential, G. H. Reservoir has a poor condition assessment as of May 2021, indicating the need for maintenance and repair. The dam features an uncontrolled spillway with a width of 200 feet and one uncontrolled outlet gate. The surrounding drainage area is 17.4 square miles, with a maximum discharge capacity of 6,772 cubic feet per second. While the reservoir has not undergone significant modifications in recent years, regular inspections are conducted to ensure its structural integrity and safety.
In the event of an emergency, it is essential for the owners of G. H. Reservoir to have an updated Emergency Action Plan (EAP) in place to mitigate risks and protect downstream communities. With a moderate risk assessment rating, there is a need for proactive risk management measures to address any potential issues that may arise in the future. As a vital water resource in the region, G. H. Reservoir plays a crucial role in water storage and flood control, highlighting the importance of ongoing maintenance and oversight to ensure its continued functionality.
Year Completed |
1977 |
Dam Length |
1175 |
Dam Height |
17 |
River Or Stream |
MIDDLE DITCH DRAW |
Primary Dam Type |
Earth |
Surface Area |
38 |
Hydraulic Height |
12 |
Drainage Area |
17.4 |
Nid Storage |
165 |
Structural Height |
17 |
Outlet Gates |
Uncontrolled - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
17 |
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.
G. H. Reservoir