Hosensack No 4 Reservoir Report

Last Updated: December 6, 2025

Hosensack No 4, located in Lower Milford Township, Pennsylvania, is a privately owned earth dam that was completed in 1885 for recreational purposes along the Indian Creek.


°F

°F

mph

Wind

%

Humidity

Summary

With a height of 32 feet and a length of 310 feet, the dam has a storage capacity of 45 acre-feet and a surface area of 3 acres. The dam is regulated by the Pennsylvania Department of Environmental Protection, ensuring that it meets state inspection and enforcement standards.

Despite being classified as having a significant hazard potential, Hosensack No 4 is currently assessed to be in fair condition. The dam has an uncontrolled spillway with a width of 175 feet and is regularly inspected every two years, with the last inspection conducted in June 2020. Although it has not undergone any modifications in recent years, the risk assessment for the dam is considered moderate.

Hosensack No 4 serves as a vital recreational resource for the community, providing opportunities for water-based activities and enjoyment along the Indian Creek. With its historical significance dating back to the late 19th century, the dam continues to be a focal point for water resource and climate enthusiasts interested in the preservation and management of Pennsylvania's water infrastructure.

Year Completed

1885

Dam Length

310

Dam Height

32

River Or Stream

INDIAN CREEK

Primary Dam Type

Earth

Surface Area

3

Drainage Area

3.9

Nid Storage

45

Hazard Potential

Significant

Foundations

Unlisted/Unknown

Nid Height

32
       
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.