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To: Sam who wrote (14977)	2/19/1999 12:08:00 PM
From: maintenance	Read Replies (1) \| Respond to of 26850

The key to building the ice road is to clear the snow. The snow acts as insulation and thus the depth of freeze is less. If I remember correctly six inches of ice is sufficient to carry a car. There is quite a technology that has built up regarding ice roads but I think the main thing is to keep the ice clear of snow. One interesting phenomena is where the fresh water meets salt water you get hills in the ice road. On the ocean you also get large pressure ridges that form and hence the road must be re-routed around them. Cheers

To: Sam who wrote (14977)	2/19/1999 1:15:00 PM
From: Walt	Respond to of 26850

Its pretty mild today -15C. To build an ice road you can either pack the snow or plough it to the side to let the cold penetrate. You can drive a snowmobile or pick up across a few inches of ice. the more weight the more ice you need. At some river crosses etc they will actually flood the ice with water to build it up that way. The bigger trucks have to go slow on the ice roads otherwise they create an ice wave which breaks the ice when it hits shore so on lakes the trucks go only 30 or 40 Kilometers I believe. hope that helps Regards Walt