Belknap Creek No. 1 Reservoir Report

Last Updated: December 5, 2025

Belknap Creek No.


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Summary

1 is a historic earth dam located in Cody, Wyoming, completed in 1917 for the primary purpose of irrigation. This offstream structure stands at a height of 20 feet and has a hydraulic height of 15 feet, storing up to 151 acre-feet of water for agricultural use. Despite its age, the dam has a low hazard potential but has been assessed as being in poor condition as of June 2020.

Owned privately, this dam is regulated by the State Engineer's Office of Wyoming, with inspection, enforcement, and permitting responsibilities falling under the state's jurisdiction. With a drainage area of zero and a small surface area of 9 acres, Belknap Creek No. 1 plays a crucial role in water supply for the surrounding area. Although the dam's condition is less than ideal, its historical significance and importance for irrigation make it a noteworthy structure for water resource and climate enthusiasts to monitor and potentially support in maintenance and rehabilitation efforts to ensure its continued functionality and safety.

Year Completed

1917

Dam Length

410

Dam Height

20

River Or Stream

BELKNAP CREEK OFFSTREAM

Primary Dam Type

Earth

Surface Area

9

Hydraulic Height

15

Nid Storage

151

Structural Height

20

Hazard Potential

Low

Nid Height

20
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.