Lower Morgan Reservoir Report
Nearby: Enl. West Pearson Stock Nw Pearson
Last Updated: December 9, 2025
Lower Morgan is a privately owned earth dam located in Campbell, Wyoming, along the Morgan Draw.
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Summary
Built in 2001 by designer Russ Dahlgren, it stands at an impressive structural height of 88 feet and has a storage capacity of 338 acre-feet, primarily used for irrigation purposes. The dam is regulated by the Wyoming State Engineer's Office and undergoes regular inspections to ensure its safety and functionality.
With a hazard potential classified as significant and a moderate risk assessment, Lower Morgan plays a crucial role in providing water for irrigation, fire protection, stock watering, and fish and wildlife habitats in the area. Its uncontrolled spillway, with a width of 100 feet, can handle a maximum discharge of 2940 cubic feet per second. The dam's condition is regularly assessed, with the last inspection conducted in April 2021, and emergency action plans are in place to mitigate any potential risks associated with the dam.
Located in Congressional District 00 of Wyoming, Lower Morgan serves as a key water resource infrastructure in the region, managed by private owners with state regulatory oversight. Its strategic location along the Morgan Draw contributes to the conservation and utilization of water resources for various purposes, highlighting the intersection of water management, climate resilience, and agricultural sustainability in the area.
Year Completed |
2001 |
Dam Length |
839 |
Dam Height |
70 |
River Or Stream |
MORGAN DRAW |
Primary Dam Type |
Earth |
Surface Area |
12.77 |
Hydraulic Height |
62 |
Drainage Area |
0.57 |
Nid Storage |
338 |
Structural Height |
88 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Significant |
Foundations |
Rock, Soil |
Nid Height |
88 |
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.
Lower Morgan