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Railroading on the Southern Pacific Coast

SPINS

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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.

The following SPINS documents have been scanned into PDF files:

San Jose Zones 01 to 10 (PDF 18Mb)
San Francisco
Mulford to Alviso

A SPINS number contains up to eight digits. The first two digits always indicate the zone to which the car is destined; the next two digits, track within a zone and the following two or four digits, actual spot or a range of spots where a car is to be placed.

Example:

SPINS code 082501 means car is for zone 8, track 25 and is ordered to spot 1 on that track.
SPINS code 08250105 means zone 8, track 25 and car will be placed to any open spot from 1 to 5.

Zone/Track numbers appear on switch targets. Spot signs appear where customers normally load or unload cars. Spot signs are 6"x6" green metal signs with four-inch reflectorized numbers. These signs are placed about 12 inches above ground, at the center of a car spot for spotting from the opposite side of the car.

(*) Asterick before and after a spot number indicates preferred spots.

Where it is not practical to place signs, one of the following spotting codes will appear on your printed lists in place of the actual spot number:

90: team track
91: Storage track with no assigned spots
92: end of spur track spotting
93: for placement under a mobile crane
94: Hopper dump spotting
95: Platform spotting
96: Piggyback ramp spotting
97: Auto ramp spotting
98: Cattle chute spotting
99: Open area, or random spotting, where it is not possible to place a spot sign.
00: Foreman code for when a car is left on the proper track but not on the correct spot.

Example:

SPINS Zone 01 is part of San Francisco downtown
Tracks 82-90 are for United Fruit Company
Each track has room for between 2 and 6 cars; one track is for storage
Thus, SPINS codes for United Fruit could be any of
01820102
01830106
01840106
01850106
01860106
01870106
01880106
01890106
019091