Chicago : Engineering and Contracting Pub. Co. · leaf 229
S6 17 i I J D •0 … / • I Tunnel Level y Il< 7oo Tunnel -J Fig. 1 — Profile of Sewer Tunnel at Pratt City, Ala. on the line of the sewer necessitated tunnel-ing with deep open cut approaches. The ac-companying profile; Fig. 1, illustrates the sizeof the job and the method of attacking thework. When rock was…
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