Day 10

Cross Bronx Expressway

January 9th, 2012

An oft-reviled road


  1. tna says:

    More of that NYC bedrock. Is NYC built on a really big rock?

    • Alisa11 says:

      “Geologically, a predominant feature of the substrata of Manhattan is that the underlying bedrock base of the island rises considerably closer to the surface near the midtown district, dips down lower between 29th street and Canal street, then rises towards the surface again under the Financial district; this feature is the underlying reason for the clustering of skyscrapers in the Midtown and Financial district areas, and their absence over the intervening territory between these two areas, as their foundations can be sunk more securely into solid bedrock.”

      But other parts of Manhattan are landfill. The bedrock is probably why the island survived the erosion of the Hudson and East Rivers.

  2. tna says:

    Thanks Alisa11!

  3. Joisy Jeff says:

    I love to see this when driving in the city.

  4. Dennis Harper says:

    Buried in the rock above the highway is the D train subway line. Above the subway is the Grand Concourse, one of the larger roads in the Bronx. As a kid I watched all this being built. I remember not being able to comprehend why my neighborhood was being torn up for some kind of wacky underground highway.

    I never though it possible to go under the Concourse, the subway and Jerome Ave which carries an El subway. It still seems crazy that they simply drew a line from the GW bridge to what was then the Bruckner Circle. There were a few deviations but not much considering how many people were displaced and the need to undo millions of years of serious geology. Look at it with Bing maps Bird’s Eye View. The idea behind this and many other city projects that required brute force was a single man, Robert Moses…he didn’t even drive a car!!

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