Map showing alpine debris flows triggered by a July 28, 1999 thunderstorm in the central Front Range of Colorado: Debris-flow polygons

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Description On July 28, 1999, about 480 debris flows were triggered by an afternoon thunderstorm along the Continental Divide in Clear Creek and Summit counties in the central Front Range of Colorado. This cover shows the outlines of debris-flow source areas, travel
Originators Godt, Jonathan W. and Coe, Jeffrey A.
Publication U.S. Geological Survey Open-File Report 03-050

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States or counties


boundary line

Label Definition
BOUND indicates whether the arc encloses the study area boundary


debris flow or othe polygonal area of interest

Label Definition
SURFACE indicates feature type