OPR meaning in Regional ?

The New York and Ottawa Railway was a railway connecting Tupper Lake in northeastern New York to Ottawa, Ontario, via Ramsayville, Russell, Embrun, Finch and Cornwall. It became part of the New York Central Railroad system in 1913, although it was under the larger company's possession since the end of 1904. It had started-out as the Northern Adirondack Railroad and evolved into the Northern New York Railroad, the New York and Ottawa Railroad, and was last known as the New York and Ottawa Railway before being merged into the New York Central and Hudson River Railroad. Other lines that were a part of this route are described below.