The Wall Reservoir Report

Last Updated: December 13, 2025

The Wall, located in Campbell, Wyoming, is a privately owned earth dam constructed in 2009 for irrigation purposes along the Wall Draw river.


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Summary

Designed by Hugh Lowham, the dam stands at a height of 38 feet with a hydraulic height of 33 feet, and a length of 455 feet. It has a storage capacity of 32 acre-feet and covers a surface area of 1.9 acres, serving as a critical water resource for the surrounding area.

With a low hazard potential and fair condition assessment, The Wall is regularly inspected every 5 years to ensure its safety and functionality. It features an uncontrolled spillway with a width of 30 feet and an outlet gate with a valve. The dam plays a crucial role in providing water for irrigation, fire protection, and stock maintenance, highlighting its importance in sustaining the local ecosystem and economy in Wyoming.

Despite its moderate risk assessment, The Wall demonstrates a commitment to risk management measures and compliance with state regulations. As a key infrastructure for water management in the region, it serves as a reminder of the intricate balance between water resources, climate factors, and human intervention in maintaining a sustainable environment.

Year Completed

2009

Dam Length

455

Dam Height

38

River Or Stream

WALL DRAW

Primary Dam Type

Earth

Surface Area

1.9

Hydraulic Height

33

Drainage Area

0.04

Nid Storage

32

Structural Height

38

Outlet Gates

Valve - 1

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

38
       
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.