Belknap Creek No. 4 Reservoir Report

Last Updated: December 5, 2025

Belknap Creek No.


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Summary

4 is a private irrigation structure located in Cody, Wyoming, along the Belknap Creek. Built in 1917, this earth dam stands at 23 feet in height and has a storage capacity of 99 acre-feet, with a normal storage level of 74 acre-feet. The dam is primarily used for irrigation purposes, providing essential water supply to the surrounding area.

Despite its age, Belknap Creek No. 4 is assessed to be in fair condition with a low hazard potential. The dam features an uncontrolled spillway with a width of 20 feet and an outlet gate for water regulation. Regular inspections are conducted, with the last assessment taking place in June 2020. The risk assessment for this structure is rated as moderate, indicating a need for ongoing monitoring and potential risk management measures.

Overall, Belknap Creek No. 4 serves as a vital water resource for the region, supporting agricultural activities and water supply needs. With its historical significance and functional purpose, this dam continues to play a crucial role in water management along the Belknap Creek, contributing to the resilience and sustainability of the local ecosystem.

Year Completed

1917

Dam Length

240

Dam Height

23

River Or Stream

BELKNAP CREEK

Primary Dam Type

Earth

Surface Area

7

Hydraulic Height

10

Nid Storage

99

Structural Height

15

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

23
       
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.