Norton No. 2 Reservoir Report

Last Updated: December 5, 2025

Norton No.


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Summary

2 is a privately owned dam located in Healdsburg, California, along the Tr Dry Creek. Built in 1956, this earth dam stands at 28 feet high and spans 430 feet in length, providing a storage capacity of 102 acre-feet for irrigation and water supply purposes. The dam is regulated and inspected by the California Department of Water Resources, ensuring its safety and compliance with state regulations.

Despite its satisfactory condition assessment, Norton No. 2 is classified with a high hazard potential, highlighting the importance of regular inspections and emergency preparedness. Located in Sonoma County, this dam plays a crucial role in water management and supply for the region. With a hazard potential rating of high, it is essential for stakeholders to stay vigilant and ensure the proper maintenance and management of this vital water resource infrastructure.

Managed by the Natural Resources Conservation Service, Norton No. 2 serves as a key component in the water supply infrastructure of the area. With its strategic location and significant storage capacity, this dam contributes to the sustainable management of water resources in Sonoma County. As water resource and climate enthusiasts, it is crucial to monitor and support the continued maintenance and operation of Norton No. 2 to safeguard its role in ensuring water security for the community.

Year Completed

1956

Dam Length

430

Dam Height

28

River Or Stream

Tr Dry Creek

Primary Dam Type

Earth

Surface Area

12

Hydraulic Height

22.2

Drainage Area

0.22

Nid Storage

102

Hazard Potential

High

Nid Height

28
       
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.