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. 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.