State Police HQ Rain Garden. Andy Gavin, Chief of the Restoration Section at the Susquehanna River Basin Commission, talks about the installation of a rain garden project at the State Police Headquarters Building in Harrisburg. The project is part of several in the Paxton Creek Watershed aimed at encouraging stormwater infiltration, reducing stormwater and nutrient runoff. Homeowners and farmers can use the same technique on water from downspouts around their buildings. Visit the Paxton Creek Stormwater Project webpage for more information.