Kiewit Acme Ditch No. 1 Reservoir Report

Last Updated: December 5, 2025

Kiewit Acme Ditch No.


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Summary

1, located in Wyoming, is a privately owned irrigation structure that was completed in 1969. This earth dam, standing at 42 feet tall with a hydraulic height of 33 feet, serves the primary purpose of providing water for irrigation in the region. The dam has a storage capacity of 49 acre-feet, with normal storage levels at 34 acre-feet.

The dam is situated on the West Pass or Cave Creek river or stream, with a spillway width of 12 feet and an uncontrolled spillway type. Despite its age, the dam is in fair condition, with a low hazard potential. It is inspected every 5 years, with the last inspection conducted in September 2019. The structure has a moderate risk assessment rating of 3, indicating the need for ongoing monitoring and management measures to ensure its safety and continued functionality.

While Kiewit Acme Ditch No. 1 may not have a high risk level, its importance in providing water for irrigation highlights the critical role it plays in sustaining agriculture in the area. With its significant storage capacity and strategic location, this dam serves as a vital resource for the community and underscores the importance of maintaining and managing water resources in a changing climate.

Year Completed

1969

Dam Length

1156

Dam Height

42

River Or Stream

WEST PASS OR CAVE CREEK

Primary Dam Type

Earth

Surface Area

3

Hydraulic Height

33

Nid Storage

49

Structural Height

42

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

42
       
Seasonal Comparison

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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.