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Rockfall on eastbound lane of Interstate 70, 2 miles west of Bergen Park interchange (El Rancho). Jefferson County, Colorado.1973.

Dates

Date Taken
1973

Summary

Rockfall on eastbound lane of Interstate 70, 2 miles west of Bergen Park interchange (El Rancho). Failure was along joints (fractures) and foliation planes (layering) in Precambrian gneiss. Rockfall obstructed all of eastbound land and medium and part of westbound lane before cleanup began. Estimated weight of largest boulders exceeded 200 tons. Jefferson County, Colorado. May 8, 1973. Figure 18 in U.S. Geological Survey. Circular 689. 1973.

Contacts

Data Owner :
U.S. Geological Survey
Photographer :
Hansen, Wallace R.

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Identifiers

Type Scheme Key
name photoLibrary hwr00174
number photoLibrary 15345
batch photoLibrary btch209
number_in_book photoLibrary 174

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