THE PARK AVENUE TUNNEL CAVE-IN. toward the surface. On either side of the rock was 42 340A57 CAVE-IN SHOWING THE METHOD OF REPAIRS BY BULKHEADING AND GROUTING 30. 74\ NNX 200Fr 0 PLAN VIEW OF CAVE-IN SHOWING CRATER AND BULKHEADS. PROFILE OF THE EASTERLY TUNNEL SHOWING PRESENT STATE OF THE WORK. THE NEW BERMUDA FLOATING DOCK. BY H. J. SHEPSTONE. ET CONSTRUCTED, scientific american, 1902-04-05
THE PARK AVENUE TUNNEL CAVE-IN. toward the surface. On either side of the rock was 42 340A57 CAVE-IN SHOWING THE METHOD OF REPAIRS BY BULKHEADING AND GROUTING 30. 74\ NNX 200Fr 0 PLAN VIEW OF CAVE-IN SHOWING CRATER AND BULKHEADS. PROFILE OF THE EASTERLY TUNNEL SHOWING PRESENT STATE OF THE WORK. THE NEW BERMUDA FLOATING DOCK. BY H. J. SHEPSTONE. ET CONSTRUCTED, scientific american, 1902-04-05
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