Rock excavation is running two to three months ahead of schedule at the $67.7 million Hanging Lake tunnel project, which will carry I-70 through the Rockies at Glenwood Canyon, Colorado. With twin bores 3900 ft long, requiring 290,000 cu yd of hard rock to be drilled and shot, Hanging Lake is one of the world's largest tunneling projects now underway. The key to the job's rapid progress is the use, for blasthole drilling, of two twin-boomed H245 rock drills made by Atlas Copco Roctec Inc. This article provides further details of the excavation, which is scheduled for completion in 1992.

  • Availability:
  • Corporate Authors:

    Cahners Publishing Company

    275 Washington Street
    Newton, MA  United States  02158-1630
  • Authors:
    • Brown, D C
  • Publication Date: 1991-6

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 46-47
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00608664
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 31 1991 12:00AM