Cannon Ranch Reservoir Report

Last Updated: December 5, 2025

Cannon Ranch, also known as Cannon Reservoir, is a privately owned water supply dam located in Butte, California.


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Summary

This earth dam, completed in 1870, stands at a height of 18 feet and has a storage capacity of 176 acre-feet. Situated along the Tr Oregon Gulch stream, the reservoir serves as a vital source of water for the surrounding area, covering a surface area of 33 acres and draining a 0.52 square mile watershed.

Managed by the California Department of Water Resources and regulated by the Safety of Dams agency, Cannon Ranch is subject to regular inspections to ensure its structural integrity and safety. The dam has been deemed to have a significant hazard potential but is assessed to be in satisfactory condition as of September 2017. Emergency action plans and risk assessments are integral components in the ongoing management of this essential water resource infrastructure, although specific details on these aspects are not provided in the available data.

With its historical significance, essential role in water supply, and regulatory oversight to ensure public safety, Cannon Ranch represents a key piece of California's water resource infrastructure. Its presence along the Tr Oregon Gulch stream highlights the importance of maintaining and monitoring such structures to safeguard against potential hazards and ensure reliable water access for the local community.

Year Completed

1870

Dam Length

310

Dam Height

18

River Or Stream

Tr Oregon Gulch

Primary Dam Type

Earth

Surface Area

33

Hydraulic Height

13

Drainage Area

0.52

Nid Storage

176

Hazard Potential

Significant

Nid Height

18
       
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.