Portland and Western Railroad Locomotives

PWRR Locomotives 3003 and 2303 parked on a siding caught my eye this afternoon.
3003 is an EMD GP-40 that was built in 1967; 2303 is an EMD GP-39 built in 1974.
Both of these locomotives are very actively used for hauling freight on the Portland and Western Railroad.
I see often see them individually rolling along pulling a mixed freight train.
It is the first time I've caught them parked on a siding together.