other · 1946
Air Entrained Concrete Markings
Caption says, "5-AL-465. Specifications No. 1179. Completed siphon transition showing air entrained concrete markings. Station 530+50, West Canal."
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Caption says, "5-AL-465. Specifications No. 1179. Completed siphon transition showing air entrained concrete markings. Station 530+50, West Canal."