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| How much ballast remains? (1585511) | |||
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How much ballast remains? |
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Posted by gbs on Fri Sep 17 03:20:46 2021 When the IRT subway opened in 1904, ballast was used to secure the underground tracks, and dual contract construction also used ballast, but I believe that much of the original IND trackage was embedded in concrete. Over the years much of the ballast has been replaced with concrete, but even up to a few years ago I recall seeing some switches embedded in ballast. How much underground ballast remains, and where is it located? Of course on outdoor embankments and in open trenches and yards ballast is still used, but is any left underground? (When the Queens Blvd #7 viaduct was first re-hab'ed in the mid-80s, the tracks were embedded in ballast. When it was re-done a few years later, the tracks were embedded in concrete, and they still are today.) |
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