Bowman No.1 Reservoir Report
Nearby: South Ricketts Flat Sg Palo
Last Updated: December 12, 2025
Bowman No.1 is a privately owned irrigation dam located in Johnson, Wyoming, along the Bowman Draw river.
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Summary
Constructed in 2004 by designer Shawn Higley, this earth dam stands at a height of 23 feet and serves multiple purposes including fire protection, stock, small fish pond, and fish and wildlife pond in addition to irrigation. With a storage capacity of 33 acre-feet, the dam covers a surface area of 3 acres and has a drainage area of 0.1 square miles.
Despite being classified as having a low hazard potential and fair condition assessment, Bowman No.1 is subject to state regulation, inspection, and enforcement by the SEO agency in Wyoming. In case of emergencies, the dam is equipped with a single valve outlet gate for controlled water release. With a spillway width of 20 feet and a maximum discharge capacity of 480 cubic feet per second, the dam is designed to handle moderate risk levels, as assessed by the regulatory authorities.
Located within Congressional District 00 of Wyoming, Bowman No.1 plays a vital role in water management for agricultural purposes in the region. With its strategic positioning and impact on the local ecosystem, this dam serves as an essential piece of infrastructure for sustaining water resources and climate resilience in the area.
Year Completed |
2004 |
Dam Length |
426 |
Dam Height |
23 |
River Or Stream |
BOWMAN DRAW |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
19 |
Drainage Area |
0.1 |
Nid Storage |
33 |
Structural Height |
28 |
Outlet Gates |
Valve - 1 |
Hazard Potential |
Low |
Foundations |
Rock, Soil |
Nid Height |
28 |
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.
Bowman No.1