The steam in ther Turntable pit could quite likely steam and hot wq2ater from cleaning the Cab Floor and Tender Apron and deck of coal dust and dirt since wet coal dust can be just like a steppingt on a sheet of ice year round.
I have seen several pictures of the Ouray Turn, and one or two of them show the Fireman steam cleaning the floor and deck with the cab steam hose.
The Winter cold would keep that steam floating for a little while.
When I was working aroiund steam we would wash the deck after almost every trip.
Stephen Smith