Located in Sullivan, New York, the Gossweyler Lake Dam stands as a vital structure along the Callicoon Creek, serving as a recreational hub for water resource and climate enthusiasts. Built in 1931, this earth dam spans 150 feet in length and reaches a height of 10 feet, with a maximum storage capacity of 68 acre-feet. The dam's primary purpose is for recreation, offering a serene surface area of 9 acres for outdoor activities.

Managed by a private owner, the Gossweyler Lake Dam is regulated by the New York State Department of Environmental Conservation (NYS DEC), ensuring its state jurisdiction, permitting, inspection, and enforcement. The dam's spillway, categorized as uncontrolled, has a width of 20 feet and a maximum discharge capacity of 94 cubic feet per second. With a significant hazard potential and a moderate risk assessment rating of 3, the dam underscores the importance of proper risk management measures and emergency preparedness.

In 2017, the Gossweyler Lake Dam underwent its last inspection, with a frequency of every 4 years. While its condition assessment remains unrated, the dam's operational status and compliance with guidelines continue to be monitored to uphold safety standards. As a cornerstone of recreation and water conservation in the region, the Gossweyler Lake Dam exemplifies the intersection of human ingenuity and environmental stewardship for sustainable resource management.