A friend who lives on Knickerbocker was doing some digging and found this print of men laying a new sewer system underneath Knickerbocker Avenue in 1885, using “an improved method of tunneling.”
“The Knickerbocker Avenue Extension Sewer, Brooklyn, N.Y.,” Scientific American, Volume LIII, No. 24 (12 December 1885)
click to enlarge
