North Prong No. 1 Reservoir Report
Nearby: T55nr76w31sese Robinson
Last Updated: December 5, 2025
North Prong No.
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Summary
1 is a privately owned Earth dam located on N. Prong Wild Horse Creek in Sheridan, Wyoming. Built in 2002 for Fish and Wildlife Pond purposes, this structure stands at 26 feet high with a hydraulic height of 18 feet and a length of 262 feet. It has a storage capacity of 312 acre-feet and covers a surface area of 40.9 acres, serving multiple functions such as fire protection, stock, recreation, and fish and wildlife habitat.
Despite its fair condition assessment and low hazard potential, North Prong No. 1 is regulated, permitted, inspected, and enforced by the Wyoming State regulatory agency, ensuring its safety and compliance with state standards. The dam features an uncontrolled spillway with a width of 50 feet and a slide (sluice gate) outlet gate. Its last inspection in 2017 deemed it to be in satisfactory condition, with a moderate risk assessment rating of 3. This structure plays a crucial role in supporting the local ecosystem and providing recreational opportunities in the area.
Managed by private owners, North Prong No. 1 exemplifies the importance of sustainable water resource management and climate resilience. With its strategic location and design, this Earth dam contributes to the conservation of fish and wildlife habitats, while also offering recreational benefits to the community. Its adherence to state regulations and maintenance practices ensure the safety and longevity of this essential water infrastructure for future generations to come.
Year Completed |
2002 |
Dam Length |
262 |
Dam Height |
23 |
River Or Stream |
N. PRONG WILD HORSE CREEK |
Primary Dam Type |
Earth |
Surface Area |
40.9 |
Hydraulic Height |
18 |
Drainage Area |
25 |
Nid Storage |
312 |
Structural Height |
26 |
Outlet Gates |
Slide (sluice gate) - 1 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
26 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Powder River At Arvada
|
156cfs |
Wild Horse Creek Near Arvada
|
0cfs |
Clear Creek Near Arvada
|
256cfs |
Powder River At Moorhead Mt
|
60cfs |
Piney Creek At Kearny
|
113cfs |
Little Powder River Ab Dry Creek
|
1cfs |
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.
North Prong No. 1