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Why Detroit has 100 Miles of Secret Tunnels Below the City

109K views · Jul 9, 2026 · Education

Comments · 109

  • @mikedownes4782 · 2 months ago

    I live in Windsor, Ontario which is directly across from Detroit and we have a successful salt mine and also share the automotive industry. Love my Detroit friends and family.

    22

  • @matthewjohns201 · 2 months ago

    It is funny that Ryan worried about pronouncing "Pontchartrain" and got ir right but messed up "Rouge".

    47

  • @Awsom47Merc · 2 months ago (edited)

    Back in the early sixties our Cub Scout Den  went on a tour of the mine. It was a sight to behold ! 👊😎👍

    16

  • @jdmb03 · 2 months ago

    Just imagine if the permit for industrial waste was approved. The mines would be contaminated and never used for salt again. That would have been a shame.

    19

  • @joegordon5117 · 2 months ago

    So, I guess KISS should have sung about "Detroit, Rock Salt City"?? 😁

    37

  • @shadowpulpfan1 · 2 months ago

    The salt mine below Detroit is pretty well known to history buffs in the area. <br><br>The whole area has large salt deposits under it. Saline, Michigan, south of Detroit was named for historically significant salt springs. North of Detroit was a salt spring on that inspired the name of the Salt River. That salt spring has dried up, but the name and the river are still there. Goderich, Ontario, further north of Detroit and across Lake Huron from Michigan, sits above a huge salt deposit and has a very productive salt mine. <br><br>There are probably other salt springs and or mines that I&apos;m not aware of.

    9

  • @MrNigel1340 · 2 months ago

    A very interesting and well laid out video Ryan, I wonder how many people myself included didn,t know there was a salt mine below Detroit, would be an interesting place to visit, regards Nigel from England.

    15

  • @TheHawk--oe8iq · 2 months ago

    Native suburban Detroiter for over fifty years. Forgotten? This salt mine still has over sixty TRILLION tons of unmined salt. Knowing this, makes me laugh whenever I hear about a Detroit suburb suffering from a (road) salt shortage during the winter. Of various types and ways of refining salt, road salt refining has got to have the minimum requirements. Now, a budget shortfall to purchase road salt is just poor budgeting practice.

    9

  • @jeffh7663 · 2 months ago

    The first geologist was basically guessing. The original river bank where the city is now was basically a small salt marsh. There were salt springs around and driven wells frequently were salty. The salt formation also curves upwards, along with the other bedrock formations, right to the surface. You could see salt right on the ground very close to where the first shaft was sunk. So it was a pretty safe assumption a large formation existed underground somewhere.

    1

  • @Detroit_LO · 2 months ago

    Take a ride on i-75 going south bound, you can see the piles of salt in the industrial area near ecorse

    3

  • @93xcr440 · 2 months ago

    My grandpa drove semi and I&apos;ve been in the Salt Mines under Lake Huron in the early 1990s it was a awesome experience

    1

  • @AngryQuokka · 2 months ago

    Yet another informative and enjoyable episode.

    3

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