Jackson Creek Spillway Reservoir Report

Last Updated: December 5, 2025

Jackson Creek Spillway, also known as Jackson Creek Dam, is a significant water resource structure located in Buena Vista, California.


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Summary

Operated by a Public Utility, this dam is crucial for water supply purposes and serves various other functions like Fish and Wildlife Pond, Hydroelectric, Recreation, and Water Supply. With a height of 37 feet and a storage capacity of 198,000 acre-feet, Jackson Creek Spillway plays a vital role in managing water resources in the region.

Managed by the Federal Energy Regulatory Commission, Jackson Creek Spillway has a high hazard potential and is subject to state regulations for safety. The dam, primarily made of earth with concrete elements, spans a length of 1360 feet and covers a surface area of 2200 acres. While it does not have a spillway, the dam is designed to withstand high water pressures and ensure the safety of the surrounding areas in case of emergencies.

Despite lacking recent condition assessments, Jackson Creek Spillway remains a critical infrastructure for water management in Amador County. With its high risk assessment rating and the absence of detailed risk management measures, ongoing monitoring and maintenance are essential to ensure the safety and efficiency of this important water resource structure.

Dam Length

1360

Dam Height

37

River Or Stream

Mokelumne River

Primary Dam Type

Earth

Surface Area

2200

Nid Storage

198000

Hazard Potential

High

Foundations

Rock

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.