Experiment Station Reservoir Report

Last Updated: December 5, 2025

Experiment Station, also known as Round Top, is a crucial local government-owned irrigation structure located in Laramie, Wyoming.


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Summary

Built in 1932, this earth dam stands at 23 feet in height and stretches 711 feet in length, with a storage capacity of 320 acre-feet. Serving as a vital water resource for the area, Experiment Station regulates the flow of Crow Creek Offstream and plays a significant role in supporting agricultural activities in the region.

Despite being classified as having a low hazard potential and fair condition assessment, Experiment Station undergoes regular inspections every five years to ensure its continued safety and functionality. With a maximum discharge of 400 cubic feet per second and an uncontrolled spillway width of 50 feet, this structure is equipped to handle moderate risk levels. The dam's valve outlet system and surrounding stone core and soil foundation further enhance its resilience to potential challenges.

Located just 4 miles from Cheyenne, Experiment Station is a testament to the intersection of water resource management and climate resilience. With its historical significance and ongoing impact on the local ecosystem, this irrigation structure serves as a key example of infrastructure designed to navigate challenges and support sustainable water use in Wyoming.

Year Completed

1932

Dam Length

711

Dam Height

23

River Or Stream

CROW CREEK OFFSTREAM

Primary Dam Type

Earth

Surface Area

17

Hydraulic Height

18

Drainage Area

0.4

Nid Storage

320

Structural Height

23

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

23
       
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.