Spruce Run Reservoir Reservoir Report

Last Updated: December 10, 2025

Spruce Run Reservoir, located in White Deer Township, Pennsylvania, is a vital water supply reservoir with a capacity of 1,860 acre-feet and a surface area of 64 acres.


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Summary

The reservoir was completed in 1957 and primarily serves as a source of water for the surrounding area. With a drainage area of 13.5 square miles, Spruce Run Reservoir plays a crucial role in providing water for various purposes, including domestic, agricultural, and industrial use.

This Earth dam structure stands at a height of 46 feet and spans a length of 4,900 feet, with a core type of Buttress. The reservoir underwent structural modifications in 2005 to ensure its continued functionality and safety. Despite being rated as having a high hazard potential, the dam is currently assessed to be in fair condition. Regular inspections are conducted, with the last inspection taking place in June 2020, to monitor the dam's integrity and address any maintenance needs promptly.

Managed by a private entity and regulated by the Pennsylvania Department of Environmental Protection, Spruce Run Reservoir is a critical water resource in Union County, Pennsylvania. Its strategic location and significant storage capacity make it an essential component of the region's water infrastructure, ensuring a reliable supply of water for the community while also contributing to the area's environmental sustainability efforts.

Years Modified

2005 - Structural

Year Completed

1957

Dam Length

4900

Dam Height

46

River Or Stream

SPRUCE RUN

Primary Dam Type

Earth

Surface Area

64

Drainage Area

13.5

Nid Storage

1860

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

46
       
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.