On Aug. 23, 1978, Pittsburg & Midway Coal Mining Co.'s McKinley mine, near Gallup, NM, became the only coal operation in the U.S. to have a certified operable preweighing system for unit-train loading. Coal is automatically bulk preweighed in batches of about 100 tons in a special weigh hopper before it is loaded. High accuracy of preweighing is particularly advantageous in situations where the bulk density of the coal varies from seam to seam.

  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  United States  10036
  • Authors:
    • Jackson, D
  • Publication Date: 1978-12

Media Info

  • Pagination: p. 57-59
  • Serial:
    • Coal Age
    • Volume: 83
    • Issue Number: 12
    • Publisher: McGraw-Hill, Incorporated

Subject/Index Terms

Filing Info

  • Accession Number: 00195102
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jul 31 1979 12:00AM