how above sea level high could a navigable river go? could it remain navigable up to 1000m if its long enough?

5 Answers

  • 5 months ago
    Best answer

    do you mean a height of 1000 meters?

    There are examples up to 650 meters, so 1000 meters is possible.

    The Saint Joe River, Idaho: With a mouth elevation of 2,129 feet (648.9 m), it is the highest navigable river in the world.

    • billrussell42
      Lv 7
      5 months agoReport

      It could in theory, but I doubt you will find a river that meets that specification.

  • Paula
    Lv 7
    5 months ago


    Water in a river is essentially horizontal.

    Ships can not navigate past rapids or waterfalls.

    Of course rapids and waterfalls can be passed by a lock system - which raises a ship from a low to a higher portion of a river.

  • 5 months ago

    Spokane River, 2129 feet above sea level is the highest navigable river in the world.

  • Anonymous
    5 months ago

    My study of rivers is that they remain flat along their course except for the waterfalls. Going towards the sea(downhill) the last waterfall signifies the beginning of the estuary.

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