Hi Mayhemers,
Intrigued by the news report that they have shifted 100,000 tonnes of snow at Gatwick Airport, I wondered how much snow was in our garden.
I filled a 500ml measuring cylinder with some snow, making a point to keep it at the same density and not to pack it down, then, after it had melted, I was was left with 80ml of water. Knowing the depth of the snow at 381mm (15inches) and the approximate 25x25 metre size of the back garden, this gave me a figure of 38 tonnes.
On that basis, the front drive, at a rough estimate (I'm going out to measure it this weather!), must have about 15 tonnes laying on it! - I think I shall let it melt.
I've told my wife and now she's worried that the roof might collapse!
Ian.