Larry is right on target. Just compass east (rr west) of Moscow ID - you can see the town in the right background. Charles, perhaps your dad had business at the University of Idaho in Moscow?

BN's ex NP Palouse & Lewiston branch ran south from Marshall (9 mi west of Spokane) to Arrow Jct, on the Camas Prairie east of Lewiston. 1753 was former NP 315, GP9 built 8/1957 and part of the group 302-316 originally assigned to the Idaho division. It held the unofficial record for the most tonnage dragged up Sunshine hill, between Pullman and Moscow. 1753 eventually wound up on POVA as their 102 and is still there, rebuilt without the dynamic brakes.

The single unit in the picture implies that it is either the Kendrick local or perhaps the Pullman switcher heading to the Joel grain elevator. The Moscow to Arrow line went out of service in the mid 1980s and was finally torn up after the P&L was sold to Watco in 1996. Big mistake, in MHO. What is left of the P&L is now owned by the state of Washington and operated by the Washington and Idaho RR.