A & P No. 1 Reservoir Report
Nearby: Higgins No. 1 Higgins No. 2
Last Updated: December 5, 2025
A & P No.
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Summary
1 is a privately owned irrigation dam located on Dry Creek in Converse, Wyoming. Built in 1954, this earth dam stands at a height of 27 feet and has a storage capacity of 358 acre-feet, with a normal storage level of 214 acre-feet. The dam serves the primary purpose of irrigation and spans a length of 646 feet, with a spillway width of 1000 feet. Despite being classified as having a low hazard potential, the condition assessment of the dam is rated as fair, indicating a moderate risk level.
Owned and regulated by private entities in Wyoming, A & P No. 1 undergoes inspections every five years to ensure its structural integrity and safety. The dam's emergency action plan (EAP) status, inundation maps, and risk management measures are not currently available, highlighting potential areas for improvement in emergency preparedness. With its location in a region susceptible to climate variability and water resource challenges, the management and maintenance of A & P No. 1 are crucial for sustaining agricultural activities and mitigating risks associated with dam failure.
As a critical infrastructure supporting irrigation in the area, A & P No. 1 plays a vital role in water resource management in Converse County. With its stone core and soil foundation, the dam's design and construction reflect engineering practices of the time, emphasizing the need for continued monitoring and maintenance to ensure its long-term functionality. Climate enthusiasts and water resource professionals alike can appreciate the complexities involved in managing and safeguarding dams like A & P No. 1 to support sustainable water use and resilience in the face of changing environmental conditions.
Year Completed |
1954 |
Dam Length |
646 |
Dam Height |
27 |
River Or Stream |
DRY CREEK |
Primary Dam Type |
Earth |
Surface Area |
25 |
Hydraulic Height |
22 |
Nid Storage |
358 |
Structural Height |
27 |
Outlet Gates |
Slide (sluice gate) - 0 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Deer Creek In Canyon
|
5cfs |
Box Elder Creek At Boxelder
|
26cfs |
North Platte River At Orin
|
534cfs |
North Platte River Below Glendo Reservoir
|
5710cfs |
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.
A & P No. 1
Canyon
Upper Boxelder Canyon