Snyder No. 1 Reservoir Report

Last Updated: December 5, 2025

Snyder No.


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Summary

1 is a private irrigation dam located in Greybull, Wyoming, with a primary purpose of providing water for agricultural use. Completed in 1995, this Earth-type dam stands at a height of 21 feet and has a storage capacity of 597 acre-feet. Situated on the Emblem Drive tributary of the Greybull River, this dam plays a crucial role in water management in the region, with a maximum discharge capacity of 186 cubic feet per second.

Despite its low hazard potential and fair condition assessment, Snyder No. 1 is subject to regular state inspection, regulation, and enforcement to ensure its safety and functionality. With a spillway width of 50 feet and a drainage area of 3.1 square miles, this dam has a surface area of 35 acres and a normal storage capacity of 333 acre-feet. The surrounding area benefits from the water resources provided by Snyder No. 1, contributing to the agriculture and ecosystem of Big Horn County.

As a vital component of the water infrastructure in Wyoming, Snyder No. 1 serves as a testament to the importance of sustainable water resource management in the face of climate challenges. With its strategic location and efficient design, this dam plays a key role in supporting the local community and economy by ensuring reliable access to water for irrigation purposes.

Year Completed

1995

Dam Length

1200

Dam Height

21

River Or Stream

EMBLEM DR, TRIB. GREYBULL RIV.

Primary Dam Type

Earth

Surface Area

35

Hydraulic Height

15

Drainage Area

3.1

Nid Storage

597

Structural Height

21

Hazard Potential

Low

Nid Height

21
       
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.