Many more photos here:

Photos: Colorado floods devastate Boulder, Lyons, Longmont, Front Range communities

The amount of destruction for a relatively small geographical area is astonishing. It's probably something like an area of 50 x 50 miles where the storm stayed centered, pouring down on to very steep terrain. If the storm had occurred 50 miles to the east, it would have come down on pretty flat land where the damage would have been minimal. But the way the canyons concentrated that water into narrow river beds wrought havoc.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13