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by Stratigraphy.net
New from Snet: Lithologs, a new tool to create lithological/sedimentological logs online..

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Calgary pipe - the legacy of 70's concrete

 I lived through a lot of this, and I looked it up as an engineer doing tunnels and such.  The same issue that hit Calgary, has been hitting northern bridges.  I have a feeling they will have to replace the whole water main, and that this repair will only last a few months before another section goes.In the 60's we built with a lot of concrete and little steel.  You still see

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