Asphalt pavement demolition: Caterpillar 845B backhoe loads asphalt pavement debris into rear of two tandem rear dump trailers. Mott Childrens Hospital, University of Michigan, Ann Arbor, Michigan, May, 2007.
Demolition, drawbridge:  Demolition view of bascule drawbridge on Potomac River, in open position, but with the draw bridge leaves (beams and road deck) cut off; leaving the geared rotating base (circled in gray). A bascule draw bridge has counterweights (circled in blue) on back side of draw bridge leaves so that raising the leaves and opening the bridge to allow ships to go through uses very little power/ energy. Woodrow Wilson Bridge Project at George Washington Street, Alexandria, Virginia, November 2006.
Demolition/concrete construction: Caterpillar 345BL track mounted hydraulic backhoe excavator fitted with pulverizer attachment picks reinforcing bars out of debris pile and transports bars to the bar shear/lopper to be cut into smaller pieces. This muncher is responsible for munching the old concrete off the reinforcing bars so the resteel can be sheared and recycled. Old City parking garage, Washington and First, Ann Arbor, Michigan, February 2006.
Stadium construction: Reconstruction of spectator seating. Upper portion is new seating. Left mid-upper is old concrete with seats removed, and backhoe with pavement breaker attachment, demolishing old concrete. Main area is demolished seating base concrete. Right mid-upper is concrete stair stringers, not yet demolished. Backhoe in foreground loads rectangular debris bucket that crane will then raise and dump outside stadium. The Big House, Michigan Stadium, University of Michigan, Ann Arbor, 2004.
Pavement construction demolition: Volvo L90D wheel front-end loader dumps debris into rear dump truck. Broadway Bridge, Ann Arbor, 2003
Demolition construction, concrete: Caterpillar 236 skid steer loader with grappler bucket travels to move concrete debris. In rear is Caterpillar 345B backhoe excavator fitted with pulverizer to reinforcing steel bars from debris. Washington and 1st, Ann Arbor, Michigan, February 2006
Demolition, drawbridge: Drawbridge on Potomac River: From background to foreground is (1) New 4 lane highway/bridge, with white painted steel drawbridge sections, (2) 4 lane highway/bridge under construction, with stub end sections of new drawbridge, and (3) partially demolished drawbridge section from old bridge. To either side of ship passage /drawbridge area are the concrete support structures for drawbridges. areas. These consist of large hollow bridge piers for old bridge and massive triangular structures for new bridge. Woodrow Wilson Bridge Project at George Washington Street, Alexandria, Virginia, November 2006.
Concrete pavement construction/demolition: Arrow HJ1350 drop hammer breaks up concrete pavement walk. Engine and cable pull hammer to top of frame and release it to impact and break pavement. Drop hammer frame can be angled and moved from side to side. Here, hammer is in middle of its fall toward pavement. Operator is looking up to avoid contact of machine with ceiling. Huron High School, Ann Arbor, Michigan June 2006.
Concrete pavement construction/demolition: Arrow HJ1350 drop hammer breaks up concrete pavement walk. Engine and cable pull hammer to top of frame and release it to impact and break pavement. Drop hammer frame can be angled and moved from side to side. Here, hammer has just hit pavement. Operator is looking up to avoid contact of machine with ceiling. Huron High School, Ann Arbor, Michigan June 2006.
Asphalt pavement demolition: Caterpillar 845B backhoe loads asphalt pavement debris into rear of two tandem rear dump trailers. Mott Childrens Hospital, University of Michigan, Ann Arbor, Michigan, May, 2007.
Asphalt pavement demolition: Caterpillar 845B backhoe loads asphalt pavement debris into rear of two tandem rear dump trailers. Mott Childrens Hospital, University of Michigan, Ann Arbor, Michigan, May, 2007.
Asphalt pavement demolition: Caterpillar 845B backhoe loads asphalt pavement debris into rear of two tandem rear dump trailers. Mott Childrens Hospital, University of Michigan, Ann Arbor, Michigan, May, 2007.
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