McCook Quarry resumes blasting for first time since November earthquake

March 15, 2014


McCook Quarry is reportedly set to resume blasting on Monday, according to the Chicago Tribune.

The Lehigh Hanson-owned quarry suspended blasting after a 3.2-magnitude earthquake shook parts of Illinois and Wisconsin in November following a routine blast.

Within two weeks of the tremor, officials with the U.S. Geological Survey (USGS) determined that the blast likely caused the earthquake. However, in a Dec. 15 report from The Doings La Grange, a geologist says there is not enough data to connect the earthquake to the blast at the quarry.

The Chicago Tribune report notes that the USGS is working to install a more sensitive seismograph at the quarry, which will allow the agency to better monitor seismic activity at the site. The Illinois Department of Natural Resources (DNR) is installing a second seismograph, according to the report.

Lehigh Hanson spokesman Jeff Sieg told the Chicago Tribune that the company intends to continue cooperating with the USGS.

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