Like many parts of Providence, the athletic fields beside Hope High School are built on fill, but unlike buildings along the old waterfront or over marshy ponds, these fields are built over a former man-made reservoir that served an important role in…

At 43 Camp Street, passers-by see a school playground, shaded by a stand of pine trees and surrounded by a chain link fence. During recess, children's excited shouts reach the sidewalk. The adjoining playing field is flat and grassy, belying the fact…