New Hogan Lake Reservoir Report

Last Updated: December 5, 2025

New Hogan Lake is a reservoir located in Calaveras County, California.


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Summary

The lake was created in 1963 by the construction of the New Hogan Dam, which was built as a part of the Central Valley Project. The lake is primarily used for irrigation, flood control, and recreation purposes. It has a capacity of 337,000 acre-feet and covers an area of 4,400 acres. The hydrology of the lake is mainly attributed to the Calaveras River and the Bear Creek watersheds. Surface flow from these watersheds feeds the lake, as well as the snowpack during winter. The water from the lake is used for agricultural purposes in the surrounding area. The lake also provides recreational activities like hiking, fishing, camping, and boating.

Reservoir Details

Storage 24hr Change -0.25%
Percent of Normal 193%
Minimum 23,499.0 acre-ft
2015-12-18
Maximum 311,058.0 acre-ft
2006-04-05
Average 112,489 acre-ft
Nid_Height 210
Hydraulic_Height 195
Drainage_Area 363
Year_Completed 1963
Dam_Height 155
Structural_Height 210
River_Or_Stream CALAVERAS RIVER
Primary_Dam_Type Rockfill
Surface_Area 4400
Hazard_Potential High
Nid_Storage 317100
Dam_Length 1960
       
Seasonal Comparison
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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.