COST ANALYSIS AND COMMENTS ON THE GRAVITY VACUUM TRANSIT SYSTEM TUNNEL CONSTRUCTION - NEW YORK CITY AND SAN FRANCISCO BAY AREAS

THE PROPOSED GVT SYSTEM FOR NEW YORK WOULD COVER SOME 92.9 MILES OF TUNNELS AND STATION FACILITIES. IN AN OVERVIEW OF THEIR COST ESTIMATES, THE AUTHORS NOTE THAT ONLY 84.5 MILES CAN BE CONSTRUCTED USING CURRENT TECHNOLOGY; THE REMAINDER WOULD REQUIRE TUNNELING IN "SOFT GROUND" AT DEPTHS IN EXCESS OF 100 FEET, WHICH IS NOT DEEMED FEASIBLE WITH AVAILABLE METHODS. THE COST PROJECTIONS WERE BASED ON THE ASSUMPTION OF A SINGLE TUNNEL ENCASING TWO GRAVITY-VACUUM TUBES CONSTRUCTED USING CONVENTIONAL DRILL AND BLAST TECHNOLOGY. REVISION OF THE PLANS TO INCLUDE TWO SMALLER-DIAMETER TUNNELS OR THE ADVENT OF NEW BORING TECHNIQUES WOULD THEREFORE ALTER THE ESTIMATES SUBSTANTIALLY. COST ASSESSMENTS WERE DEVELOPED FOR ALL ASPECTS OF THE TUNNEL CONSTRUCTION INCLUDING: LABOR, EXCAVATION, EQUIPMENT, MUCK DISPOSAL, LINING AND SUPPORT MATERIALS, AND ADDITIONAL COST ORIGIN AND DESTINATION MODE. THE BASIC SUBSYSTEMS ARE MILLION AS CONTRASTED WITH APPROXIMATELY $300 MILLION ESTIMATED BY JACOBS ASSOCIATES. INCLUDED IN THE ANALYSIS IS A DETAILED GEOLOGICAL PROFILE OF THE NEW YORK CITY AREA AND A BRIEF DISCUSSION OF POTENTIAL PROBLEM AREAS IN GVT CONSTRUCTION. THE REPORT ALSO EXAMINES THE FEASIBILITY OF A GVT SYSTEM FOR SAN FRANCISCO BASED ON THE COST ESTIMATES DERIVED FOR NEW YORK. THE AUTHORS NOTE, HOWEVER, THAT AT LEAST ONE MAJOR COMPONENT OF THE OVERALL PROPOSED NETWORK WOULD NOT BE FEASIBLE BECAUSE OF SOFT GROUND CONDITIONS. THE REPORT INCLUDES GEOLOGICAL DATA FOR THE BAY AREA AND MAPS OF THE PROPOSED ROUTINGS. /UMTA/

  • Supplemental Notes:
    • PROJ NO TRD-85
  • Corporate Authors:

    Tube Transit Corporation

    P.O. Box 11335
    Palo Alto, CA  USA  94306

    Fenix and Scisson Incorporated

    Tulsa, OK  USA 
  • Authors:
    • Koomanoff, F A
  • Publication Date: 1970-7

Subject/Index Terms

Filing Info

  • Accession Number: 00242136
  • Record Type: Publication
  • Source Agency: Urban Mass Transportation Administration
  • Files: TRIS, USDOT
  • Created Date: Jan 17 1973 12:00AM