![](http://www.alamy.com/thumbs/6/A6C1A6D6-0C57-40FC-B94B-BFF5668EFEA4/DCR9P8.jpg)
Top-arch form in position under portal of diversion tunnel No. 2. Forms of trashrack structure abutment are seen. - - 293691
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Photo credit: © nsf / Alamy / Afripics
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Keywords: -, ., 2., 293691, abutment, archives, bygone, diversion, form, forms, historic, history, portal, position, structure, top-arch, trashrack, tunnel, usa, vintage