2d Av bridge at sunrise, Alpena
Alt text: Sun rises over the 2d Avenue bridge over the Thunder Bay River in Alpena. The bridge is cantilevered and is in the down position, and the control room is to the right. Across the bridge is the post office and Old Town Alpena.
More about the bridge:
https://localwiki.org/alpena/Second_Avenue_Bridge - AlpenaWiki
https://www.visitalpena.com/secondavenuebridgehistory/ - Visit Alpena
This type of bridge was first invented by William Scherzer in the 1890s and works by using a rolling action to raise and lower the roadway. This is made easier by the positioning of a large counter weight mounted at one end above the tracks on which it rotates up and down (visible in the top middle of the photo).
#glasgow #inchinnan #bridge #basculebridge #rollingliftbridge #engineering
The White Cart Scherzer Rolling Lift Bridge at Inchinnan just to the West of Glasgow. Built in 1923 by Sir William Arrol and Co, it's one of only two rolling lift bridges left in Scotland.
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#glasgow #inchinnan #bridge #basculebridge #rollingliftbridge #engineering
The Temple Bridge carrying Bearsden Road over the Forth and Clyde Canal in the west of Glasgow. Built in 1932 by William Arrol and Co Ltd and T. Somers, it was designed as a bascule bridge, with a massive counterweight hidden the right hand sandstone support, to allow it to lift up to let boat traffic pass undernearth.
#glasgow #forthandclydecanal #bridge #basculebridge #glasgowengineering
Alameda has six drawbridges between the main island and Oakland or Bay Farm Island—one is just for pedestrian and bicycle traffic, while another was just for trains and is no longer in service.
https://alamedapost.com/features/alameda-life/alamedas-drawbridges/
#alameda #oakland #drawbridge #HighStreet #ParkStreet #BasculeBridge #BayFarmIsland #FruitvaleAvenue #CenterPivotBridge #VerticalLiftBridge #MillerSweeneyBridge #AlamedaCountyPublicWorksAgency
Ed W8EMV 
This Is My Glasgow
Paul Coen
B.ella
Alameda Post