York Haven Main Dam, located in Pennsylvania along the Susquehanna River, was completed in 1904 and serves multiple purposes including hydroelectric power generation, recreation, and water supply. This concrete dam stands at a height of 10 feet with a length of 7970 feet, providing a storage capacity of 7800 acre-feet and covering a surface area of 1490 acres. With a maximum discharge capacity of 362,500 cubic feet per second, the dam plays a crucial role in managing the flow of the river and ensuring water availability for various needs.

Owned by a Public Utility and regulated by the Federal Energy Regulatory Commission, York Haven Main Dam has a low hazard potential and a moderate risk assessment rating. Despite its age, the dam remains structurally sound and well-maintained, as evidenced by regular inspections and an emergency action plan in place. The dam also features an uncontrolled spillway with a width of 4970 feet, further enhancing its capacity to manage excess water and prevent flooding downstream. Overall, York Haven Main Dam stands as a vital infrastructure for sustainable water resource management and climate resilience in the region.

In addition to its functional importance, York Haven Main Dam also provides opportunities for recreational activities and contributes to the local economy. The dam's association with the Susquehanna River adds to its ecological significance, supporting diverse wildlife habitats and enhancing the natural beauty of the surrounding area. With its long-standing history and continued relevance in modern water management practices, York Haven Main Dam represents a testament to the enduring impact of hydroelectric infrastructure on both the environment and society.