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Mackinac Bridge

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  • 1. Mackinac Bridge
    Elizabeth Upleger
    Jacalynsnana “Mackinac Bridge” June 6, 2006 via Flickr, Creative Commons Attribution
  • 2. Third Longest Suspension Bridge
    Costs $3 per car
    “Timmy”- someone afraid to cross the bridge
    Allows 6000 cars per hour.
    Fast Facts
  • 3. Move with the wind, changes in temperature, and weight
    Doesn’t sway or swing
    What is a Suspension Bridge?
    /
    DecentXposure “Crossing Over “Septempter 4, 2009 via Flickr, Creative Commons Attribution
  • 4. Longest suspension bridge in the western hemisphere
    5 miles long
    54 feet wide
    200 feet above water level
    MEASUREMENTS
  • 5.
    • Too much traffic on the ferries
    • 6. Began “ official” construction on May 7 & 8, 1954
    • 7. Opened to traffic Nov.1, 1957
    Construction
  • 8. Dr. David B. Steinman
    Jan. 1953-selected as engineer
  • 9. May 7th,1954-began Construction
    November 1, 1957- open to traffic
    September 25, 1958- 50 millionth crossing
    June 25, 1998-100 millionth crossing
    ::Important dates::
  • 10. Let’s Do the Math!
    How BIG is the Bridge?
    4
    6
    0
    0
    6
    26400
    6 ft
  • 11. Fruit by the Foot
  • 12. Football Field
    320ft
    Vs.
    Mackinac Bridge
    26400ft
  • 13. Rules and Regulations
    _
    Speed Limit: 45 mph
    No u-turns
    No passing
    Bridge personnel is always on duty
  • 14. Prentisb. Brown
    “ Father of the Mackinac Bridge”
  • 15. Begins in St. Ignace ends in Mackinaw City
    ::Annual Bridge Walk::
    People usually walk for a cause
    Do you know any causes?
  • 16. Spider Jack
    I'm Spider Jack of the Mighty Mac and my story starts generations back. My great, great, great, great, Grandpappy lived on land and he was pretty happy. He was hanging in his web, just waiting for some lunch when he heard a big boom, a bang, and a crunch! He crawled toward the racket to the top of the ridge, and saw, on the lake, they were building a bridge! He may have felt a kinship to his fellow engineers spanning a great distance as he had all his years, but as the story goes, he was never quite the same, he was drawn to the bridge like a moth to a flame! He hurried back home, hugged and kissed his wife, said "Let's pack our bags honey, and start a new life!" They were a  hardy couple with staying power, fighting the wind all the way to the first tower. That was way back in 1957, and Jack proclaimed it their own piece of heaven! Now there's over 1000 in our little clan, we all have nests just about midspan. So the next time your crossing the Mighty Mac, be sure to give a wave to the family of Spider Jack!
    By Barb Merchand
    http://www.mackinacbridge.org/spider-jack--36/
  • 17. Spider jack
  • 18. GRAB THE MIC
    “Favorite Fact”