Renner Sibley Creek Reservoir Report

Last Updated: December 6, 2025

Renner Sibley Creek, located in Modoc County, California, is a privately owned earth dam constructed in 1959 primarily for water supply purposes, including irrigation.


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Summary

With a dam height of 28 feet and a storage capacity of 765 acre-feet, this structure plays a vital role in managing the water resources of the area. The dam sits on Sibley Creek, covering a surface area of 95 acres and draining a watershed of 2.18 square miles.

Managed by the California Department of Water Resources (DWR) under the Safety of Dams program, Renner Sibley Creek Dam is regularly inspected and maintained to ensure its structural integrity and safety. The most recent assessment in 2017 deemed the dam to be in satisfactory condition with a low hazard potential. Despite its age, the dam continues to serve its purpose efficiently, showcasing the importance of responsible water resource management in the face of climate variability and increasing demands for water supply in the region.

Renner Sibley Creek Dam stands as a testament to the essential role of infrastructure in sustaining water resources for agricultural and domestic use in California. With its strategic location and reliable performance, the dam exemplifies the importance of proactive regulation, inspection, and maintenance practices in ensuring the resilience of water supply systems amidst changing climatic conditions. As water resource and climate enthusiasts, understanding the significance of structures like Renner Sibley Creek Dam highlights the interconnectedness between human activities, natural resources, and environmental stewardship in building a sustainable future.

Year Completed

1959

Dam Length

1275

Dam Height

28

River Or Stream

Sibley Creek

Primary Dam Type

Earth

Surface Area

95

Hydraulic Height

24

Drainage Area

2.18

Nid Storage

765

Hazard Potential

Low

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.