... Contract Number 75-124-2H consists of tunnels and drop shafts; bid December 14, 1977 at $101,970,680 by the Joint Venture of J.F. Shea Company, Inc. and Peter Kiewit Sons Company. Major items of work are a 7.62 m (25ft) construction shaft, 4,184 m (l3,276.LF) of 9.14 m (30 ft) finished diameter rock tunnel...

... Lining, 6.7 m diameter concrete, August 1979* 17 Drop Shafts, 26 Surface Structures 73-058-BH 19,300,000 161.5 m Clay Seam Tunnel Lining Concrete 8 Drop Shafts, Sept. 1979* 24 Surface Structures 73-D58-CH 15,900,000 96 m Tunnel Stubouts, 113 m Deep Gate Structure, Concrete October 1979* 2 Drop Shafts, 4...

... between exchanges are 2134 mm i.d. and can carry up to 220 cables of up tolOOmm diameter on steel brackets cantilevering from the sides of the tunnels. In some cases tunnels have been driven into which to divert cables which were previously in ducts beneath the pavements and road- ways where extensive...

... Artificial Intelligence model test rock salt Upstream Oil & Gas Thickness anhydrite diameter natural gas storage cavern salt bed salt formation investigation hydrocarbon storage cavern stress rearrangement Reservoir Characterization stope cavern diameter saltdome cavern...

... of separate air intake and exhaust flows for the development and waste-handling systems and to provide an independent waste-handling shaft. These shafts were multiple function facilities ranging in finished diameter from 18-26 ft (5.5-7.9 m). All of the shafts are centrally situated in a manner to reduce...