Menardi & White Reservoir Report

Last Updated: December 5, 2025

Menardi & White is a privately owned irrigation dam located in Sheridan, Wyoming, along the South Piney Creek.


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Summary

Constructed in 1951 by designer Clyde R. Wood, this earth dam stands at a height of 37 feet and has a storage capacity of 281 acre-feet. With a primary purpose of irrigation, the dam also serves for fire protection, stock watering, and small fish pond purposes. Its spillway type is uncontrolled, with a width of 8 feet, and it is equipped with a slide (sluice gate) outlet gate.

Despite being classified as having a low hazard potential and fair condition assessment, Menardi & White poses a moderate risk level. The dam has a history of consistent state regulation, inspection, and enforcement to ensure its safe operation. The last inspection conducted in September 2021 revealed that the dam meets guidelines, with an inspection frequency set at every 5 years. With Liz Cheney (R) representing the Congressional District 00 in Wyoming where the dam is located, Menardi & White remains a vital infrastructure for water resource management in the region, attracting climate enthusiasts and water resource experts alike.

Year Completed

1951

Dam Length

855

Dam Height

37

River Or Stream

SOUTH PINEY CREEK

Primary Dam Type

Earth

Surface Area

10

Hydraulic Height

30

Nid Storage

281

Structural Height

35

Outlet Gates

Slide (sluice gate) - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

37
       
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.