Beside the crew from the Sappi Mill in Hinkley, there are two or three switchers, a daily train to Rigby, and usually Bangor as well. This is also one of the major repair facilities with a dead engine line and engine pool.
Videos
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MEC 606 WAPO gets help from WA-1 after stalling at Monmouth Maine on March 6th of 2020. Video by John Erickson. See this video on YouTube and subscribe.
MEC 3401, 619, 606, 507, and 604 bring WAPO through Hackets in Auburn ME on March 12th of 2020. Video by John Erickson.
PanAm MEC engines 515, 619, & 600 bring WAPO through Deering Junction in Portland on November 7th of 2020. Video by John Erickson.
PanAm MEC engines 7535, 7797, 7594, 5976, & 7541 bring WAPO through Lewiston on December 4th of 2020. Video by John Erickson.
PanAm used a four character symbol to refer to each train that could tell you where the train started from and where it ended up. Long distance trains got four letters, the first two for the origin, and the last two for the destination. Switchers got two letters a dash and a number. The nicknames used could confuse this though (Sappi-3 was actually SP-3, I believe). The OCS (Officer and Crew Special) was a passenger train used to reward employees for good service and give dispatchers, company officers, and prospective customers a look at the lines. It usually consisted of three former parlor service cars pulled by two FP9 locomotives built in 1954. And the Oil Extra was a train that ran as a stop-gap measure during the Lac-Mégantic accident and Montreal, Maine and Atlantic Railway bankruptcy and sale to the Central Maine and Quebec Railway.
I will list the symbols I know with their end point city or town.