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Pipes - other/unique materials (3) (Click on thumbnails to enlarge image) |
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Pipes - other/unique materials (3) (Click on thumbnails to enlarge image) |
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Hill Avenue Interceptor Viaduct NW, August 4, 1938. Superior, Wisconsin. Sanitary sewer built into viaduct's mortared rock structure. Superior, Wisconsin. Source: Dan Romans, Superior Public Works Department, Superior, Wisconsin. |
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