Mining and Sapping under the Citadel, Confederate fortifications, at Port Hudson, Louisiana. The terms "mining" and "sapping" refer to military siege tactics, in which soldiers dig trenches and tunnels to reach fortifications and then use explosives…
Passengers stand on the deck of the Sanitary District's ship "Juliet," the first craft to navigate the Chicago Sanitary and Ship Canal. The Bear Trap Dam is visible in the background.
Photo caption: "Crews worked around the clock to replace the Sangamon River trestle between Oakford and Kilbourne. Accumulated brush and logs had ignited the day before, burning up the old trestle. It was a rare occasion to se the 4-4-0's on anything…