Hi sorry I can't take a direct stab at the basic question as I am out of town and away from maps and photots. I can however tell you that the per AFE materials the tank was jointly owned by SVRy and OLC. Consider that it was only 1 mile or so back to Austin, so SVRy engines heading toward Dixie summit could have watered at the big tank at Austin, would have used very little water in the 1 mile or so of nearly level track before starting up grade on Bridge Crk. I have to wonder why the tank was jointly owned at all.