FAST HORIZONTAL DRILLING SPEEDS I-70 TUNNEL JOB

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:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03620506
• 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:
  • Highways and Heavy Construction
  • Volume: 134
  • Issue Number: 7
  • Publisher: Cahners Publishing Company
  • ISSN: 0362-0506

Subject/Index Terms

• TRT Terms: Rock drilling; Rock excavation; Tunneling
• Old TRIS Terms: Rock drills
• Subject Areas: Bridges and other structures; Construction; Highways; Vehicles and Equipment; I54: Construction of Tunnels;

Filing Info

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