Mysterious West shore spur.

I spotted this spur while looking at sanborn maps online. I do not have much information about what I do know: It came off of the West shore RR. It was used by the Nobles Gypsum co Or the American Gypsum Co. I attached the two images of maps that have it, a Topo map from 1944 and a sanborn from 1923. It is located about 2.5 miles North east of Akron NY near Tesnow road. I was wondering if anyone has any information on this spur, or the company. Did they use their own power?

1910 to 1976. Plymouth, Whitcomb, and Cincinnati Car locos. Lasted a long time. No mystery.

The spur on the map goes backwards from what was in place during later years. The diagonal road must be Bloomingdale Rd so the line is correct until it crosses. Then, it proceeded east along the north side of the dead end road until it reached the structure at the end shown just over the word "copyright". This would be the gypsum plant. Don't believe they used any locomotives of there own until sometime in the 1950's when NYC declined to run up the spur anymore. The plant still exists as a storage facility but the tracks are long gone. The tracks on the map curve in the opposite direction and go along the steep ridge which runs through Akron all the way to Clarence. Gypsum was extracted at places along the ridge in the very early days when this resource was beginning to be used. Gypsum could have been hauled to somewhere else from the mines indicated . The West Peanut line ran further up the ridge but the line further down has been farmed for years and I have never noticed any trace of the spur. The map looks modern but is obviously from an earlier time. Does it have a date?

Some corrections here. The map is correct for the original laid out plant and railroad. Later, new buildings and track were built heading east.

The plant employed its own 24" gauge track and power starting in 1913. Standard gauge power arrived in 1936. They certainly did their own switching.

Lineage of plant is:

American Gypsum Company before 1909-4/1923
Noble Gypsum Company 4/1923-6/1924
Universal Gypsum and Lime Co. 6/1924-1935
National Gypsum Company 1935-1965
National Gypsum Company Gold Bond Building Products Division 1966-1976

Here is a 1949 map with the tracks shifted east:

The map is from 1944, does this mean there was ever track in the location listed on the map? Or was it never there and they put track in to the east later?

Yes, the first map on this page is how the spur was originally and then it was changed to the map I posted. The first map reflects basic mining, crushing and shipping of gypsum to be use in Buffalo. The second map, with the new line and large footprint building, reflects the mining, crushing, and MANUFACTURING of end product onsite (Wallboard I think is what Gold Bond made).

Did the abandonment of the railroad kill the plant, or the other way around

I think lack of rail service killed it.