File:Taborian Hospital.jpg

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Description

Subsidence in the median of I-70, shown here, occurred while the mine was being backfilled with grout (a mix of cement, fly ash, and water) to protect the roadway. In the background are two drill rigs used to drill holes down to the mine void to place the grout.

Source

U.S. Department of Transportation; Federal Highway Administration

Date

7/30/2009 13:22

Author
Permission
(Reusing this file)

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