Looking through Ron Findley’s collection, I came across a few photo prints of three of the ALCO model RS1 locomotives that the Louisiana Midland Railway owned during its final life. Shown below is the #1107, a former Gulf, Mobile and Ohio locomotive of the same number. It appears that a crew member is adding water to the unit’s radiator via the top filler during its servicing routine. The photographer noted that the engine had overheated while pulling 54 cars.

She had been acquired in 1974, and I understand that she led a rather short life on the road due to an engine failure.
Photographed by Louis Saillard in July of 1975. Thanks to Tony Howe for providing this, and other information.
I’ve updated the post, adding the photographer’s name, and additional information about the locomotive provided by Tony Howe.
-Jack