Re: Dry-stack walls on the DSP&P

Posted by ke0azq on
URL: http://c-sng-discussion-forum.254.s1.nabble.com/Dry-stack-walls-on-the-DSP-P-tp14641p14653.html

Essential to hydraulic performance of a dry-stack wall is backfill with heartings, which compare to ballast. Oh no. The DSP&P did not use ballast at Como, or on Boreas Pass. Luckily, the stacks at The Palisades had all the heartings they needed thanks to the Alpine Tunnel. [Thanks to John Meixel]
So this wall and this wall don't look a lot alike but they were within a milepost of each other. Why so different?