Pine Reservoir Report

Last Updated: December 5, 2025

Pine is a captivating hydroelectric dam located in Florence, Wisconsin, along Pine Creek.


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Summary

Built in 1922 by Mead & Seastone, this concrete dam stands at a height of 41 feet and serves multiple purposes, including hydroelectric power generation and recreation. With a storage capacity of 1483 acre-feet and a maximum discharge of 15400 cubic feet per second, Pine plays a crucial role in managing water resources in the region.

Managed by the Federal Energy Regulatory Commission, Pine Dam is considered to have a low hazard potential but a very high risk rating. Despite not having a recent condition assessment available, the dam is inspected every three years to ensure its structural integrity and safety. The spillway is controlled with a width of 98 feet, and the dam features seven Tainter (radial) outlet gates. Pine Dam's location in the Detroit District and its proximity to Niagara make it a significant landmark for water resource and climate enthusiasts to explore and learn about the intersection of hydroelectric power and environmental conservation in Wisconsin.

Year Completed

1922

Dam Length

647

Dam Height

41

River Or Stream

Pine Creek

Primary Dam Type

Concrete

Surface Area

170

Hydraulic Height

35.1

Drainage Area

520

Nid Storage

1483

Structural Height

41.9

Outlet Gates

Tainter (radial) - 7

Hazard Potential

Low

Foundations

Soil

Nid Height

42
       
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.