Lake County Sanitation District 2 Reservoir Report

Last Updated: December 5, 2025

Lake County Sanitation District 2, located in Lake Port, California, is a vital water resource infrastructure managed by the local government.


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Summary

This earth dam was completed in 1976 and serves primarily as a water supply source, with a storage capacity of 870 acre-feet. Situated on Tr Lyons Creek, the dam stands at a height of 77 feet and spans a length of 650 feet, with a surface area of 34 acres and a drainage area of 0.3 square miles.

Maintaining a high hazard potential, Lake County Sanitation District 2 is regulated by the California Department of Water Resources and the Safety of Dams agency. The dam is subject to regular state inspections, with the most recent assessment in March 2021 deeming its condition as satisfactory. Despite its age, the dam continues to fulfill its flood risk reduction, irrigation, and water supply purposes for the surrounding area, showcasing its importance in water resource management and climate resilience efforts.

With its strategic location and critical role in water supply management, Lake County Sanitation District 2 exemplifies the intersection of infrastructure, environmental stewardship, and public safety. As an essential component of the local water infrastructure, this dam underscores the importance of proactive maintenance, regulatory oversight, and emergency preparedness in safeguarding water resources and communities against potential risks and hazards.

Year Completed

1976

Dam Length

650

Dam Height

77

River Or Stream

Tr Lyons Creek

Primary Dam Type

Earth

Surface Area

34

Hydraulic Height

72

Drainage Area

0.3

Nid Storage

870

Hazard Potential

High

Nid Height

77
       
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.