Interlaken, located in Lackawanna, Pennsylvania, is a privately owned dam regulated by the Pennsylvania Department of Environmental Protection. Built in 1928 for recreational purposes, this earth dam stands at 10 feet high and spans 425 feet in length, creating a storage capacity of 61 acre-feet. The dam's primary source of water is the TR Summit Lake Creek, with a drainage area of 0.4 square miles.

With a spillway width of 30 feet and an uncontrolled spillway type, Interlaken poses a high hazard potential but is currently rated as satisfactory in condition. The dam has undergone modifications in 2000 for both hydraulic and structural improvements. Despite its moderate risk level, the dam is regularly inspected and meets state permitting and enforcement requirements to ensure public safety and water resource management. For water resource and climate enthusiasts, Interlaken offers a fascinating glimpse into the intersection of human infrastructure and natural ecosystems in the Pennsylvania landscape.