Full Moon Reservoir Report
Last Updated: December 8, 2025
Full Moon, located in Campbell, Wyoming, is a privately owned earth dam with a primary purpose of irrigation.
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Summary
Built in 1945 by designer Hugh Lowham, this dam stands at a height of 20 feet and has a maximum storage capacity of 155 acre-feet. With a surface area of 13.77 acres and a drainage area of 0.81 square miles, Full Moon serves the Reynolds Draw stream for irrigation, fire protection, stock, and small fish pond purposes.
Despite its low hazard potential and fair condition assessment, Full Moon has a moderate risk rating of 3. The dam features an uncontrolled spillway with a width of 50 feet and a valve outlet gate. With a history of inspection and maintenance, Full Moon is equipped to handle a maximum discharge of 1782 cubic feet per second. For water resource and climate enthusiasts, Full Moon offers a glimpse into the intersection of human infrastructure and natural ecosystems in managing water resources for agricultural and ecological needs in Wyoming.
Year Completed |
1945 |
Dam Length |
653 |
Dam Height |
20 |
River Or Stream |
REYNOLDS DRAW |
Primary Dam Type |
Earth |
Surface Area |
13.77 |
Hydraulic Height |
15 |
Drainage Area |
0.81 |
Nid Storage |
155 |
Structural Height |
22 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
22 |
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.
Full Moon