Horsch Stockwater Reservoir Report

Last Updated: December 14, 2025

Horsch Stockwater, located in Natrona County, Wyoming, is a privately owned earth dam completed in 1952 for fire protection, stock, or small fish pond purposes.


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Summary

The dam stands at a height of 30 feet with a hydraulic height of 25 feet, providing a storage capacity of 48 acre-feet. It is situated on Wright Creek in Casper, about 3 miles away from the city, and falls under the jurisdiction of the Wyoming State Engineer's Office for regulation, inspection, and enforcement.

The dam has a spillway width of 10 feet and an uncontrolled spillway type, with a low hazard potential and fair condition assessment as of the last inspection in August 2018. With a moderate risk assessment rating of 3, the dam is subject to inspections every 5 years and has an outlet gate for water release. The surrounding area covers approximately 4 acres with a drainage area of zero, making it essential for maintaining water resources and climate stability in the region.

Despite being privately owned, Horsch Stockwater plays a crucial role in providing water resources for fire protection, livestock, and recreational activities in the area. Its strategic location on Wright Creek and its moderate risk assessment highlight the importance of proper maintenance and management to ensure the safety and sustainability of this vital water resource for both the local community and the environment.

Year Completed

1952

Dam Length

511

Dam Height

30

River Or Stream

WRIGHT CREEK

Primary Dam Type

Earth

Surface Area

4

Hydraulic Height

25

Nid Storage

48

Structural Height

30

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Soil

Nid Height

30
       
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.