‘engineering feat’ historical pictures (exact matches)

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Grace and Co's boat "Santa Teresa" passing the Culebra Cut, Panama Canal
Grace and Co's boat "Santa Teresa" passing the Culebra Cut, Panama Canal
Front Street, Colon, Republic of Panama
Front Street, Colon, Republic of Panama
Gatun Spillway, showing 4 sluice gates discharging, Panama Canal
Gatun Spillway, showing 4 sluice gates discharging, Panama Canal