Unexpected Flood Debris

Once storm sewers filled with sediment and debris, flooding on the streets got worse.

After the flood waters subsided, plows were brought in to clear the streets. Mounds of sandy soil and rocks lined the streets throughout Boulder and in many areas, the sediment was piled more than a foot deep on the right-of-way between the street and sidewalk.

Pine logs washed down from the mountains above Boulder were stripped of bark and deeply scarred by the time they wound up on the city’s streets.

Lines of wooden flotsam mark what had been the edge of the floodwaters.

Debris that floated was left piled wherever it reached a barrier that kept it from flowing any farther.

Sidewalks had to be shoveled to make them passable.

Formerly lush green lawns were buried with sandy soil and strewn with rocks washed out of nearby creek beds.

Part of this yard was filled with sand a full foot deep which gave the appearance that deciduous trees were growing on a beach.

This apartment house was right in the active floodway and was pummeled with rocks tumbled along by strong water currents.

This urban alleyway was deeply filled with sediment, even after a plow went through.

A section of this mountainside gave way in a mudslide after the soil was oversaturated with record amounts of rainfall. It’s not clear whether soil from the slide inundated the nearest residential property a few hundred yards below or if an adjacent irrigation ditch was to blame.

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