Chamberlain No. 1 Reservoir Report

Last Updated: December 5, 2025

Chamberlain No.


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Summary

1 is a privately owned irrigation dam located in Converse, Wyoming, along Laprele Creek. Built in 1965 by designer John A Lambert, this earth dam stands at a height of 27 feet and has a storage capacity of 727 acre-feet. The dam's primary purpose is irrigation, serving the surrounding agricultural community in Douglas.

With a significant hazard potential and fair condition assessment, Chamberlain No. 1 is under state regulation and inspection in Wyoming. The dam features an uncontrolled spillway with a width of 125 feet and a maximum discharge of 3688 cubic feet per second. The dam's emergency action plan status and risk assessment indicate a moderate risk level, highlighting the need for ongoing monitoring and maintenance to ensure public safety and water resource sustainability.

Overall, Chamberlain No. 1 plays a crucial role in water management along Laprele Creek, providing irrigation water for agricultural activities in the region. As a key infrastructure asset, the dam requires regular inspections and risk management measures to mitigate potential hazards and ensure its continued operation for the benefit of the local community and the environment.

Year Completed

1965

Dam Length

2100

Dam Height

27

River Or Stream

LAPRELE CREEK

Primary Dam Type

Earth

Surface Area

40

Hydraulic Height

22

Drainage Area

0.2

Nid Storage

727

Structural Height

27

Outlet Gates

Slide (sluice gate) - 1

Hazard Potential

Significant

Foundations

Soil

Nid Height

27
       
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.