John C Youngman, also known as Mosquito Creek Reservoir, is a vital water supply infrastructure in Limestone Township, Pennsylvania. Owned and regulated by the local government, this earth dam stands tall at a height of 100.5 feet and was completed in 1951. With a storage capacity of 2581 acre-feet, it serves the primary purpose of water supply for the surrounding area.

Situated along the Mosquito Creek in Lycoming County, Pennsylvania, the John C Youngman dam plays a crucial role in managing water resources in the region. Despite its fair condition assessment and high hazard potential, the dam has been inspected regularly, with the last inspection conducted in October 2020. The Pennsylvania Department of Environmental Protection oversees its permitting, inspection, and enforcement, ensuring its safety and reliability for water supply.

Climate and water resource enthusiasts will be intrigued by the engineering and environmental aspects of the John C Youngman dam, as well as its impact on the local ecosystem. With a surface area of 61 acres and a drainage area of 2.12 square miles, this dam not only provides water storage but also contributes to flood control and water quality management along the Mosquito Creek. Its historical significance and ongoing maintenance efforts make it a noteworthy site for those interested in sustainable water resource management and climate resilience.