Rissler Reservoir Report

Last Updated: December 16, 2025

Rissler is a privately owned earth dam located in Natrona County, Wyoming, specifically in the city of Douglas.


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Summary

Built in 1951 for irrigation purposes, this dam stands at a height of 28 feet and has a hydraulic height of 22 feet. With a storage capacity of 203 acre-feet and a maximum discharge of 2497 cubic feet per second, Rissler serves as a crucial water resource for the surrounding area.

Despite being classified as having a low hazard potential, Rissler's condition assessment in 2020 was deemed fair. The dam is equipped with an uncontrolled spillway that has a width of 100 feet and a single valve outlet gate. Regular inspections are conducted with a frequency of 5 years to ensure the safety and stability of the structure. While the risk assessment for Rissler is moderate, there are currently no specific risk management measures in place.

Overall, Rissler plays a vital role in supporting irrigation activities in the region, serving as a reliable water source for agricultural purposes. As water resources and climate enthusiasts, understanding the condition and functionality of dams like Rissler is crucial in ensuring the sustainable management and utilization of water resources in the face of changing environmental conditions.

Year Completed

1951

Dam Length

458

Dam Height

28

River Or Stream

TROUT CANYON CREEK OFFSTREAM

Primary Dam Type

Earth

Surface Area

17

Hydraulic Height

22

Nid Storage

203

Structural Height

28

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

28
       
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.