I don't know any specs or details but here in Winnipeg the winters get down to minus 30 c and we have construction all year round - house basements and commercial construction. All you need is heaters and hoarding. The ground down below 3 or 4 ft is never frozen anyways.
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"But a city can be smothered by too much reverence for its past. The skyline must keep acquiring new peaks, because the day we consider it complete and untouchable is the day the city begins to die." - Justin Davidson - May 2010 Issue of New York
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