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Tunnelling over tunnel makes road job expensive
Description of 200 ft long section of 150 ft wide tunnel that will carry Boston's Central artery under Dewey Square; project involves subway protection, demolition of existing subway roof and construction of new roof, and relocation of utilities and other facilities.
Tunnelling over tunnel makes road job expensive
Description of 200 ft long section of 150 ft wide tunnel that will carry Boston's Central artery under Dewey Square; project involves subway protection, demolition of existing subway roof and construction of new roof, and relocation of utilities and other facilities.
Tunnelling over tunnel makes road job expensive
Eng News-Rec
Engineering News-Record ; 158
1957
3 pages
Aufsatz (Zeitschrift)
Englisch
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