Clementia Reservoir Report

Last Updated: December 5, 2025

Located in Rancho Murieta, California, Clementia is a significant earth dam completed in 1976 primarily for water supply purposes.


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Summary

With a height of 33 feet and a hydraulic height of 27 feet, the dam has a storage capacity of 850 acre-feet and spans 1300 feet in length. It is situated on the Tr Cosumnes River, within the Sacramento County, making it a crucial resource for water management in the region.

Managed by a public utility, Clementia is under state regulation and jurisdiction, with the Department of Water Resources and Safety of Dams overseeing its permitting, inspection, and enforcement processes. Despite being classified as having a significant hazard potential, the dam's condition assessment in 2017 deemed it satisfactory. The last inspection in February 2021 highlighted its operational reliability and safety measures, ensuring its resilience in the face of potential risks and emergencies.

With its strategic location and vital role in water supply and recreation, Clementia serves as a key asset in ensuring water resource sustainability in California. Its efficient design, satisfactory condition assessment, and adherence to state regulations make it a valuable infrastructure for climate enthusiasts and water resource experts to study and appreciate in the ongoing efforts to mitigate the impacts of climate change on water management systems.

Year Completed

1976

Dam Length

1300

Dam Height

33

River Or Stream

Tr Cosumnes Rv

Primary Dam Type

Earth

Surface Area

70

Hydraulic Height

27

Drainage Area

2.35

Nid Storage

850

Hazard Potential

Significant

Nid Height

33
       
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.