Weeks Dam Reservoir Report

Last Updated: December 5, 2025

Weeks Dam, also known as Weeks Lake Dam, is a private structure located in Santa Rosa, Florida, along the Cobb Branch river.


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Summary

Built in 1968 by the USDA NRCS, this earth dam stands at a height of 22 feet and stretches 484 feet in length. Its primary purpose is for recreation, specifically for fish and wildlife pond activities.

With a storage capacity of 73 acre-feet and a surface area of 3 acres, Weeks Dam plays a crucial role in managing water resources in the area. Although the dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment, it is regulated and inspected by the state authorities to ensure its safety and functionality. The spillway, which is uncontrolled, has a width of 90 feet to manage maximum discharges of up to 190 cubic feet per second.

Despite being a private structure, Weeks Dam contributes to the conservation and recreational efforts in the region, providing a valuable resource for both wildlife and visitors. Its moderate risk assessment and moderate risk management measures highlight the importance of continued monitoring and maintenance to ensure the integrity of the dam and the safety of the surrounding community. As a focal point for outdoor activities and water management, Weeks Dam stands as a testament to the intersection of human engineering and environmental stewardship in the face of a changing climate.

Year Completed

1968

Dam Length

484

Dam Height

22

River Or Stream

COBB BRANCH

Primary Dam Type

Earth

Surface Area

3

Drainage Area

0.39

Nid Storage

73

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Soil

Nid Height

22
       
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.