Lake Shawnee Reservoir Report

Last Updated: December 6, 2025

Lake Shawnee, located in Glenwood, Pennsylvania, is a private water body primarily used for recreation and as a fish and wildlife pond.


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Summary

Built in 1970 by the USDA NRCS, this earth dam stands 25 feet tall and spans a length of 1100 feet, with a storage capacity of 141 acre-feet. The dam overlooks Branch Butler Creek and has a spillway width of 60 feet, contributing to its significant hazard potential.

With a surface area of 16 acres and a drainage area of 0.28 square miles, Lake Shawnee offers a serene escape for outdoor enthusiasts. While its condition assessment is not available, the dam's risk assessment is moderate, signaling the need for ongoing monitoring and risk management measures. Despite its uncontrolled spillway and outlet gates, Lake Shawnee remains a picturesque destination for water resource and climate enthusiasts to enjoy the natural beauty of Susquehanna County.

Year Completed

1970

Dam Length

1100

Dam Height

25

River Or Stream

Branch Butler Creek

Primary Dam Type

Earth

Surface Area

16

Hydraulic Height

25

Drainage Area

0.28

Nid Storage

141

Structural Height

27

Outlet Gates

Uncontrolled

Hazard Potential

Significant

Foundations

Soil

Nid Height

27
       
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.