North Antelope Shop Reservoir Report
Last Updated: December 8, 2025
North Antelope Shop, located in Campbell, Wyoming, is a privately owned earth dam constructed in 1983 for purposes other than water storage.
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Summary
This dam, standing at 29 feet in height with a hydraulic height of 23 feet, is situated on Porcupine Creek and serves to control the flow of water in the area. With a low hazard potential and fair condition assessment, the dam is regularly inspected by state authorities to ensure its safety and functionality.
Despite its relatively small size, North Antelope Shop plays a crucial role in managing water resources in the region, with a drainage area of 0.3 square miles and a maximum discharge capacity of 64 cubic feet per second. The dam's spillway, of uncontrolled type and 12 feet wide, helps regulate water flow during periods of high precipitation. Additionally, the dam has a storage capacity of 18 acre-feet and covers an area of 2 acres.
As climate change continues to impact water resources, structures like North Antelope Shop become increasingly important for mitigating potential risks and ensuring water security. With its moderate risk assessment rating and state-regulated status, this dam serves as a key component of the region's water infrastructure, highlighting the critical role of effective dam management in adapting to changing environmental conditions.
Year Completed |
1983 |
Dam Length |
200 |
Dam Height |
29 |
River Or Stream |
PORCUPINE CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
23 |
Drainage Area |
0.3 |
Nid Storage |
18 |
Structural Height |
29 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
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.
North Antelope Shop