The Stevenson Dam Hydroelectric Plant is a hydroelectric power plant located on the Housatonic River at the boundary between the towns of Monroe and Oxford, Connecticut. The plant was built in 1917 and was listed on the National Register of Historic Places in 2000. The site includes three contributing structures: the Stevenson Dam, the Stevenson Dam Bridge, and the Stevenson Powerhouse. The impounding of the Housatonic River by the Stevenson Dam created Lake Zoar, a lake with 27 miles of shoreline. The plant was covered in a Historic American Engineering Record (HAER) study, record CT-183.