Spackman Brothers Dam Reservoir Report

Last Updated: December 5, 2025

Spackman Brothers Dam, located in Cache, Utah, is a privately owned structure that plays a crucial role in irrigation for the surrounding area.


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Summary

Built in 1982, this earth dam stands at a hydraulic height of 10 feet and a structural height of 11 feet, with a length of 1651 feet. It has a normal storage capacity of 430 acre-feet and is situated on the Cub River, operating offstream.

Managed by the Utah Division of Water Rights, Spackman Brothers Dam is regulated, inspected, and enforced by the state to ensure its safety and functionality. With a significant hazard potential, the dam has a regular inspection frequency of 2 years to assess its condition and address any maintenance needs. Although its condition is currently marked as "Not Rated," the dam remains a vital resource for water management and agricultural purposes in the region.

As part of the irrigation infrastructure in the area, Spackman Brothers Dam serves as a key component in water resource management for agricultural activities. With its strategic location and capacity, the dam contributes to the efficient distribution of water for irrigation purposes, supporting the local farming community. The dam's role in water storage and delivery highlights its importance in sustaining agricultural productivity and promoting efficient water use in the region.

Year Completed

1982

Dam Length

1651

River Or Stream

CUB RIVER - OFFSTREAM

Primary Dam Type

Earth

Hydraulic Height

10

Drainage Area

0.5

Nid Storage

430

Structural Height

11

Hazard Potential

Significant

Nid Height

11
       
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.