Campbell No. 2 Reservoir Report
Nearby: Anderson No. 1 Robber's Roost
Last Updated: December 7, 2025
Campbell No.
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Summary
2 is a privately owned earth dam located in Niobrara, Wyoming, along the Miller Draw river. The dam, completed in 1963, serves multiple purposes including fire protection, stock watering, and creating a small fish pond. With a height of 23 feet and a storage capacity of 240 acre-feet, the dam covers a surface area of 21 acres and has a spillway width of 10 feet.
Despite its low hazard potential, Campbell No. 2 is currently assessed to be in poor condition as of the last inspection in August 2019. The dam has one uncontrolled outlet gate and a hydraulic height of 18 feet. While the risk assessment for the dam is moderate, there are no updated emergency action plans or inundation maps prepared, raising concerns about the safety and management of potential risks associated with the structure.
With Liz Cheney representing Congressional District 00, Wyoming, where Campbell No. 2 is located, water resource and climate enthusiasts should take note of this dam's condition and the need for improved risk management measures. As a vital infrastructure for water storage and fire protection in the region, addressing the poor condition assessment and lack of updated emergency plans for Campbell No. 2 is crucial to ensuring the safety and sustainability of this important water resource.
Year Completed |
1963 |
Dam Length |
1550 |
Dam Height |
23 |
River Or Stream |
MILLER DRAW |
Primary Dam Type |
Earth |
Surface Area |
21 |
Hydraulic Height |
18 |
Nid Storage |
240 |
Structural Height |
23 |
Outlet Gates |
Uncontrolled - 1 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
23 |
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.
Campbell No. 2