Dick Week Reservoir Report

Last Updated: December 5, 2025

Dick Week, also known as Weeks Lake, is a privately owned dam located in Napa, California.


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Summary

Built in 1955, this earth dam stands at 70 feet tall and serves primarily for water supply purposes, including irrigation. Managed by the Department of Water Resources and Safety of Dams, Dick Week is state-regulated, inspected, and enforced to ensure its structural integrity and safety.

With a storage capacity of 3,140 acre-feet and a surface area of 129 acres, Dick Week plays a crucial role in water management for the surrounding area. Situated on Tr Pope Creek and overseen by the Natural Resources Conservation Service, this dam holds significant hazard potential but has been assessed as satisfactory in condition. Despite its age, regular inspections and emergency preparedness measures are in place to mitigate any potential risks and ensure the safety of the community in case of any emergencies.

The presence of Dick Week highlights the importance of sustainable water resource management in the face of changing climate conditions. As water supply becomes increasingly crucial in the region, the proper maintenance and regulation of dams like Dick Week are essential to safeguarding this vital resource for current and future generations.

Year Completed

1955

Dam Length

1050

Dam Height

70

River Or Stream

Tr Pope Creek

Primary Dam Type

Earth

Surface Area

129

Hydraulic Height

66

Nid Storage

3140

Hazard Potential

Significant

Nid Height

70
       
Seasonal Comparison

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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.