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	Title:	Subject.TGM:	Description:

561.	Crown Fountain, excavation and construction of reservoir, September 19, 2003	Excavation; Skyscrapers; Construction workers; Retaining walls; Pipes (Conduits); Trees; Surveying equipment;	A worker checks progress during construction of the concrete retaining walls surrounding the reservoir of Crown Fountain.

562.	Crown Fountain, checking clarity of glass brick panels, April 6, 2004	Glass blocks; Structural frames; Construction workers; Faces; Marks (Symbols);	A worker checks the clarity of newly installed glass brick panels on Crown Fountain's north tower.

563.	Crown Fountain, LED screen cleaning, April 1, 2004	Structural systems; Construction workers; Ladders; Pipes (Conduits); Trucks; Trailers;	A worker cleans the LED screen on the north tower. The tower has been fitted with all but the last LED panel which will go behind the gargoyle nozzle.

564.	Crown Fountain, LED screen cleaning, April 1, 2004	Structural systems; Construction workers; Ladders; Pipes (Conduits); Marks (Symbols);	A worker cleans the LED screen on the north tower.

565.	Cloud Gate, attaching steel plates, April 15, 2004	Steel; Structural frames; Structural systems; Trusses; Construction workers; Ladders; Scaffolding; Wood blocks;	A worker climbs a ladder to join another worker atop the partially assembled sculpture.

566.	Cloud Gate, attaching steel plates, April 29, 2004	Steel; Construction workers; Hoisting machinery; Tents;	A worker climbs along the steel subframe of the structure during installation.

567.	Cloud Gate, attaching steel plates, April 1, 2004	Construction workers; Steel; Trusses;	A worker climbs along the supporting steel of the partially completed sculpture while attaching steel plates. The tension of the cables and springs was adjusted constantly as construction continued to...

568.	Cloud Gate, SBC Plaza, February 13, 2004	Concrete; Plywood; Construction workers; Pipes (Conduits); Pails;	A worker drills holes into SBC Plaza, in preparation for installing the sculpture.

569.	Cloud Gate, SBC Plaza, February 13, 2004	Concrete; Construction workers; Plywood; Pipes (Conduits); Pails;	A worker drills holes into SBC Plaza, in preparation for installing the sculpture.

570.	Cloud Gate, SBC Plaza, February 13, 2004	Concrete; Plywood; Construction workers;	A worker drills holes into SBC Plaza, in preparation for installing the sculpture.

571.	Cloud Gate, SBC Plaza, March 22, 2004	Concrete; Structural systems; Trusses; Skyscrapers; Hoisting machinery; Construction workers; Construction equipment; Steel; Stairways; Grinding machines;	A worker grinds the concrete surface of SBC Plaza, along the steps. Pritzker Pavilion and the buildings along East Randolph Street are visible in the background.

572.	Cloud Gate, SBC Plaza, March 22, 2004	Concrete; Structural systems; Trusses; Construction workers; Grinding machines; Hoisting machinery; Skyscrapers; Stairways; Steel; Construction equipment;	A worker grinds the concrete surface of SBC Plaza, along the steps. Pritzker Pavilion is visible in the background.

573.	Cloud Gate, polishing, May 19, 2005	Steel; Scaffolding; Construction workers; Grinding; Ladders; Reflections;	A worker grinds the sculpture using a platen sander (a.k.a an air-driven ten pound belt sander).

574.	Cloud Gate, grinding, May 19, 2005	Steel; Scaffolding; Construction workers; Grinding; Ladders; Marks (Symbols);	A worker grinds the sculpture using a platen sander (a.k.a an air-driven ten pound belt sander). In addition to grinding and polishing the seams where the plates were welded, a two to three feet wide area...

575.	Cloud Gate, polishing, May 19, 2005	Steel; Scaffolding; Construction workers; Grinding; Tents; Reflections; Marks (Symbols);	A worker grinds the sculpture using a platen sander (a.k.a an air-driven ten pound belt sander). After being ground with 40-grit sandpaper disks, the road grader was applied to the sculpture's surface,...

576.	Cloud Gate, polishing, May 19, 2005	Steel; Scaffolding; Construction workers; Grinding; Tents; Plywood; Reflections;	A worker grinds the sculpture using a platen sander (a.k.a an air-driven ten pound belt sander).

577.	Cloud Gate, polishing, May 19, 2005	Steel; Grinding; Scaffolding; Ladders; Construction workers; Tents; Reflections;	A worker grinds the surface of the sculpture using a 15 pound air-driven belt sander (sometimes referred to as a road grader). Workers wore respirators and polyethylene jumpsuits for protection while polishing...

578.	Cloud Gate, polishing, May 19, 2005	Steel; Scaffolding; Ladders; Tents; Construction workers; Reflections; Grinding;	A worker grinds the surface of the sculpture using a 15 pound air-driven belt sander (sometimes referred to as a road grader). Workers wore respirators and polyethylene jumpsuits for protection while polishing...

579.	Crown Fountain, installing glass brick panels, April 5, 2004	Glass blocks; Structural frames; Hoisting machinery; Structural systems; Construction workers; Pipes (Conduits); Concrete; Trailers; Footprints;	A worker guides a glass panel into place on the north tower of Crown Fountain as it is hoisted from above by a crane.

580.	Crown Fountain, installing glass brick panels, April 5, 2004	Glass blocks; Structural frames; Hoisting machinery; Construction workers; Tiles; Pipes (Conduits); Concrete; Trees; Skyscrapers;	A worker guides a glass panel into place on the north tower of Crown Fountain as it is hoisted from above by a crane. The north tower has been fitted with all but the last LED panel which will go behind...