The blue track from Grants Pass is the connection to the NP. At Medford (staging) dashed lines, electrically isolated. Orange tracks are in the port, electrically isolated. Red tracks are the Waldo logging branch, electrically isolated. The towns of Grants Pass and O'Brien are also electrically isolated and use a BPBT switch to select power from the appropriate direction of travel. Because of the gaps at O'Brien, the mainline is divided into 2 sections. All of the gaps are for block control operation.
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