Lake Jane Reservoir Report

Last Updated: December 5, 2025

Lake Jane, located in Madera, California, is a privately owned reservoir with a primary purpose of water supply for irrigation and other uses.


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Summary

The earth dam, completed in 1961, stands at a height of 37 feet and has a maximum storage capacity of 182 acre-feet. The reservoir covers an area of 21 acres and is fed by the Tr Hildreth Creek.

Managed by the California Department of Water Resources and regulated by the Safety of Dams division, Lake Jane has a low hazard potential and is deemed to be in satisfactory condition as of the last assessment in September 2017. The dam is inspected annually to ensure its safety and compliance with state regulations. Although there are no associated structures or locks, the reservoir serves as a vital water resource for the surrounding area.

With its tranquil waters and essential role in water supply, Lake Jane is a notable feature of the Bonadelle Ranchos community. Enthusiasts of water resources and climate will appreciate the careful management and oversight that ensures the safety and reliability of this important reservoir. As climate change continues to impact water resources, the sustainable management of reservoirs like Lake Jane will be crucial in ensuring water security for the region.

Year Completed

1961

Dam Length

361

Dam Height

37

River Or Stream

Tr Hildreth Cr

Primary Dam Type

Earth

Surface Area

21

Hydraulic Height

30

Drainage Area

3.2

Nid Storage

182

Hazard Potential

Low

Nid Height

37
       
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.