Wading River was the end of the extension just north of what state highway on Long Island?
New York State Route 25A New York State Route 25A (NY 25A) is a state highway on Long Island in New York in the United States. It serves as the main east–west route for most of the North Shore of Long Island, running for 73 mi from Interstate 495 (I-495) at the Queens–Midtown Tunnel in the New York City borough of Queens to NY 25 in Calverton, Suffolk County. The highway is a northern alternate route of NY 25, which follows a more inland routing along Jericho Turnpike.
Swan River (New York) The Swan River flows south from Swan Lake into the mouth of Patchogue Bay, Long Island, New York, which then becomes the Great South Bay. Originally however, the headwaters reached as far north as Medford, New York, near the vicinity of Medford Station. Swan River is a relatively clean, cold, free flowing, freshwater stream, generally less than 15 feet wide, with a sandy substrate. This segment of the river flows through much undeveloped forested wetland, but has also been encroached upon by residential development, road construction, and a commercial sand mining operation. Below Montauk Highway, the river is tidal, and is bordered by undeveloped marshland and limited development of boat docking facilities. The fish and wildlife habitat encompasses the entire river, including an approximate one and one-half mile tidal segment, and an approximate two and one-half mile freshwater segment, which extends from Swan Lake, above Montauk Highway, to the headwaters of the stream, above Swan Lake, flowing southward into Patchogue Bay.