@ Romeo Oscar Golf ... I think you may be "pulling the plonker", as I have no recollection of a snow plan at Tengah.
@ Uncle Ginsters ... yes, Urea could create havoc with the local water supplies, IIRC. Limited usage only ...
and elderly gentlemen, now abed, would have a midnight 'urge' to pee 
Bottom line, snow-clearing is a
bloody complicated exercise.