96" installation, the finished job, Iowa Culvert and Pipe Co., Des Moines, Iowa

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Four men standing in an Armco Culvert. 1918 ad about Armco Culverts: "'Armco' Iron Culverts cost less per year than any other type of construction you can use to drain railroad tracks or highways. They have been on the market for years and have been installed in all parts of the country — in all kinds of soils — under all imaginable conditions — and they have made good. They last! Made of the most durable of available culvert metals — rust-resisting 'ARMCO' Iron — light, strong, resilient. Easily and quickly installed with ordinary labor, and once in the ground there to stay." 1931 postmark.