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[Ontario dump truck and steam shovel]

[Ontario dump truck and steam shovel]

[Ontario industrial landscape]

[Ontario industrial landscape]

[Ontario: steam shovel in trench]

[Ontario: steam shovel in trench]

[Ontario: dump truck in trench]

[Ontario: dump truck in trench]

[Ontario: dump trucks in water-filled trench]

[Ontario: dump trucks in water-filled trench]

[Ontario: gas pumps, men and garages]

[Ontario: gas pumps, men and garages]

[Ontario: quarry explosion]

[Ontario: quarry explosion]

[Ontario: quarry and truck]

[Ontario: quarry and truck]

[Ontario: quarry landscape]

[Ontario: quarry landscape]

[Ontario: steam shovel in quarry]

[Ontario: steam shovel in quarry]

[Ontario: dumping rocks]

[Ontario: dumping rocks]

[Ontario: quarry landscape with dump truck]

[Ontario: quarry landscape with dump truck]

[Ontario: quarry with workers and pump]

[Ontario: quarry with workers and pump]

[Ontario: Steam shovel]

[Ontario: Steam shovel]

[Ontario: quarry and pipeline]

[Ontario: quarry and pipeline]