Richard Winter (Winter)
Speaking of amazing bridges built long ago, I recently visited the railroad bridge over the Cape Cod canal, which is one of the few bridges around here that is capable of going up to let ships pass underneath and down to let trains go across. Here is a bit about it from Wikipedia:
"Built in 1933, the bridge has a 544-foot (166 m) main span, with a 135-foot (41 m) clearance when raised, and uses 1,100-short-ton (1,000 t) counterweights on each end.
At the time of its completion, it was the longest vertical lift span in the world. It is now the second longest lift bridge in the United States, the longest being the Arthur Kill Vertical Lift Bridge between New Jersey and Staten Island, New York."
It is just extraordinary to see a structure strong enough to support a 544-foot freight train raised and lowered 135 feet (it takes 2.5 minutes to raise or lower it). It is normally in the up position and is lowered when a train is coming. Since there are large ships, which require a mile or more to stop, passing through the canal -- as well as small pleasure boats which might not always monitor the radio -- patrol boats are sent a couple of miles out from the bridge to stop traffic before the bridge is lowered.
The Cape Cod canal is a migration path for fish that move up and down the East Coast with the seasons and is therefore a legenary fishing spot, particularly for striped bass. There is a strong current through the canal, but the bridge pilings are one of the few places where the water flows more slowly. This makes it a good place for big fish to hang out, so you will see people fishing at both ends of the bridge almost every day of the year.


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