Photos of the Day

In the town where my family lived during my teen years, a local bridge was opened for boat traffic manually, by three men who turned a verticle axle with a key. The bridge had wheels that fit into tracks on a lower support structure rising from the bed of the river. When the axle was turned, half of the bridge--the swing span--would rotate, opening the span to a 90 degree angle that allowed boats on the river to pass.