A person who labors or furnishes labor, teams, materials, machinery, fixtures or tools in the construction, repair or operation of a railroad, locomotive, car or other equipment, and to whom money or wages are due or owing therefor, and any person who furnishes provisions or supplies of any kind in the construction or repair of a railroad or to a contractor or subcontractor engaged in such construction or repair, for the housing, maintenance or subsistence of humans or animals employed or used in such construction or repair, and to whom any amount is due or owing therefor, shall have a lien upon the railroad and its equipment for the amounts unpaid.