Interlocking Walkthrough: STONY

In today’s interlocking walkthrough, we’re gonna take a look at STONY interlocking which is located on both ends of Stony Brook on the Port Jefferson Branch. STONY 1 and STONY 2 are two interlockings that make up an interlocking that is very similar to the other Port Jefferson Branch interlockings. Instead of having a passing siding to either side of the station like at stations such as Mastic-Shirley, the station itself is the passing siding.

The two switches that make up the interlocking, that’s simple and very similar to the other Port Jefferson Branch interlockings. Instead of having a passing siding like at stations such as Mastic-Shirley, they turned the station into the passing station itself.

The tracks around here are on a pretty steep angle, making it tough to get a good diagram. But, down below is a satellite image of the interlocking.

Western side of the interlocking

Eastern side of the interlocking

STONY interlocking is roughly about 53 miles away from Long Island City. STONY 1 is west/compass south of the station, and splits the tracks into 2 tracks, and on the other side of the platforms, STONY 2 contains one switch that merges the 2 tracks into 1.

This simple interlocking also doesn’t have much history. Unlike the other Port Jefferson Branch interlockings, this interlocking wasn’t two separate interlockings combined into one. This interlocking is also considerably newer then other Port Jefferson Branch interlockings (both STONY 1 and STONY 2 went into service in 1992.)

In the early 1990s, signals were extended to include the Port Jefferson Branch, and in 1992, both STONY and JEFF interlockings came online.

This interlocking still houses the position-light signals installed in the early 90s.

Photo: Wikimedia Commons

The nearest interlockings are the POST interlocking to the west in Smithtown, and the JEFF interlocking in Port Jefferson.