you'd be doing a lot of diverting in Europe if you were looking for a runway cleared to 45m.
The information we have from Airbus is that the minimum runway width of 45m from the AFM applies equally to contaminated runways. It's based on vmcg calculations and x-wind limits etc. They have never issued a Boeing style "snow bank height" chart. 45m (150ft in the US) is the standard runway width to the edge lights but most have quite a large area outside the lights that is weight bearing. It's true that some aerodromes only clear out to 30m to start with although major aerodromes will aim to clear the full 45m during ploughing even if they only clear the centre 30m to blacktop. If they don't you have to consider the remaining contaminant in the take-off or landing calc, if it's out limits i.e. too deep or too slippery then you can't go. Remember that even if you have blacktop on a 30m strip you could still have very shallow snow (dry 15mm or wet 4mm) out to the edge and still consider the runway as just wet for performance purposes.
Apparently we are looking at performance data to allow operations from 30m cleared width but haven’t got it yet, don't know if it's because we are behind the times (quite likely) or if Airbus haven’t issued it. If anyone has got any different info. I would be very interested to hear it.
In conclusion, roll on summer!.