After checking on a nearby mark that we'd heard might be missing (it wasn't), Rich and I enjoyed a peaceful drive along the Lackawaxen. The coordinates for this mark were stored in his GPSr, so we decided to take a look even though we didn't have the datasheet. The mark, set into the south end of the west abutment of a small bridge, was an easy find. It is in fair condition, one edge of the disk having been pried up. The disk is still solid in its setting.
Mark found in good condition, with the following updates to the description: the railroad is now the Lackawaxen-Stourbridge Railroad, and the creek is named Mill Creek. The mark is 6 inches below the top of the rail, 5.9 feet southeast of the centerline of the tracks and 84 feet east-northeast of the centerline of Rowland Road.
Handheld GPS WAAS-corrected coordinates for the mark are: 41 28 29.16(N) 075 02 4.62(W).