900,000 Pounds
That’s what the counter weight is for 1/2 of the lift bridge in Duluth (there’s one on each side). The counter weights of course mean that the power required for lifting the bridge is primarily needed to overcome friction, not the actual weight of the bridge. Imagine the hole that weight would make if it were to come loose way up in the air. Not to fear, from what I’ve seen this bridge is well maintained.
August 5th, 2008 at 5:05 pm
Excellent, love the steel girders here. Ironic, I have a similar view coming up, except without the counter weight.
September 10th, 2008 at 7:45 pm
Nice take on a familiar landmark…