Does anyone have a copy of the SPINS (Southern Pacific Industry Numbering System) for Casa Grande, AZ in 1985? SPINS is a standard method of identifying industries and switching zones, tracks and consignee loading and unloading spots. By giving zones, tracks and spots certain designated numbers, we are able to print switch lists with the exact location to which a customer's car is to be spotted. A SPINS number contains up to eight digits. The first two digits always indicate the zone to which the car is destine; next two digits, track within the zone and the following two or four digits, actual spot or a range of spots where the car is to be spotted. I would love photo copies/scans
