Barlow No. 1 Reservoir Report
Last Updated: December 8, 2025
Barlow No.
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Summary
1 is a private irrigation dam located in Campbell, Wyoming, along the Antelope Draw river. Built in 1956, this earth dam stands at 24 feet high and spans 727 feet in length, with a storage capacity of 80 acre-feet. The primary purpose of Barlow No. 1 is irrigation, with additional benefits for fire protection, stock watering, and small fish ponds.
Despite its relatively low hazard potential and fair condition assessment, Barlow No. 1 is regulated and inspected by the State of Wyoming, with enforcement and permitting responsibilities falling under the State Engineer's Office. The dam features an uncontrolled spillway with a width of 78 feet and has no outlet gates. The last inspection in June 2018 rated the dam's risk as moderate, prompting a five-year inspection frequency to ensure its continued safe operation.
Overall, Barlow No. 1 serves as a vital water resource for the surrounding area, showcasing the importance of proper maintenance and regulatory oversight for irrigation infrastructure in Wyoming. With its historical significance and ongoing role in water management, this dam represents a key component of the regional water supply system.
Year Completed |
1956 |
Dam Length |
727 |
Dam Height |
24 |
River Or Stream |
ANTELOPE DRAW |
Primary Dam Type |
Earth |
Surface Area |
7 |
Hydraulic Height |
19 |
Nid Storage |
80 |
Structural Height |
24 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
24 |
Seasonal Comparison
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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.
Barlow No. 1