Enl. Perry Reservoir Report

Last Updated: January 10, 2026

Enl.


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Summary

Perry, a privately owned earth dam located in Sheridan, Wyoming, serves multiple purposes including fire protection, stock watering, and small fish pond creation. Constructed in 2007, this dam stands at a height of 29 feet with a hydraulic height of 22 feet and a structural height of 36 feet. With a storage capacity of 339 acre-feet and a normal storage of 246 acre-feet, Enl. Perry covers a surface area of 16.47 acres and has a drainage area of 0.65 square miles.

Situated on Reed Draw, Enl. Perry features an uncontrolled spillway with a width of 86 feet and an outlet gate consisting of one valve. The dam has a low hazard potential and is rated as being in fair condition as of the last inspection in August 2017. With a moderate risk assessment rating of 3, Enl. Perry is regulated and inspected by the Wyoming State Engineer's Office and Department of Environmental Quality, ensuring its compliance with state regulations and permitting requirements.

Enl. Perry, known also as Perry Stock, is a notable structure in the water resource management and climate preservation realm. Its strategic location, purposeful design, and regulatory oversight make it a key asset for fire protection, livestock maintenance, and ecological conservation in the region, contributing significantly to the sustainable management of water resources in Sheridan County, Wyoming.

Year Completed

2007

Dam Length

675

Dam Height

29

River Or Stream

REED DRAW

Primary Dam Type

Earth

Surface Area

16.47

Hydraulic Height

22

Drainage Area

0.65

Nid Storage

339

Structural Height

36

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

36
       
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.