Pennsylvania enjoys abundant freshwater resources with more than 84,000 miles of streams, 76.6 miles of Great Lakes shoreline, many inland lakes and 57 miles of tidal coastline. These resources are shared with many other states and Canada. With a multitude of concerns, including: urban and suburban sprawl, agricultural and residential runoff, emerging contaminants, abandoned mines and wells, and new drilling in the Marcellus and Utica Shale, Pennsylvania also shares many challenges. Pennsylvania Sea Grant (Pennsylvania Sea Grant) takes a collaborative watershed approach to examine the impact of these threats, which do not recognize political boundaries, and seeks solutions. Major Geographic Focus Areas include the Lake Erie, the Delaware River, and the Susquehanna River watersheds.