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160:, is the time, during the construction of a tunnel built from both ends, when the ends meet, and the accuracy of the survey work becomes evident. Many tunnels report breakthroughs with an error of only a few inches, for example:
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Please help to demonstrate the notability of the topic by citing
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When the two sections of a tunnel under construction meet
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257:"ASCE Metropolitan Section - Holland Tunnel"
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175:replacement – 4 feet (1.2 m) - 1944
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141:10 days after the hole-through on the
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352:. You can help Knowledge by
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36:general notability guideline
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43:reliable secondary sources
32:The topic of this article
34:may not meet Knowledge's
168:– 6 inches (150 mm)
261:www.ascemetsection.org
180:Lötschberg Base Tunnel
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139:tunnel boring machine
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70:"Tunnel hole-through"
404:Rail transport stubs
143:Gotthard Base Tunnel
399:Tunnel construction
154:Tunnel hole-through
226:. October 11, 1972
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354:expanding it
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230:January 24,
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206:References
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55:redirected
171:the 1944
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111:May 2014
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189:- 1 cm
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