The Pneumatic Tube Mail System in New York City - Untapped New York
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Architecture
The Pneumatic Tube Mail System in New York City
Michelle Young
Oct 17, 2023
October 17 2023
5 min read
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I’m often asked what my favorite weird/obscure fact about New York City was. Ironically, as the founder of Untapped New York, this question frequently proves difficult because there are just so many amazing things about this city. So I went back into my memory archives, thinking what about New York City impelled me to create Untapped New York. The pneumatic tube mail system is top on that list.<br>A pneumatic tube mail canister. Photo courtesy National Postal Museum, Smithsonian InstitutionThe first pneumatic tube mail system was installed in Philadelphia (sorry New York) in 1893. New York City’s came in 1897. Each tube could carry between 400 and 600 letters and traveled at 30-35 miles per hour. In its full glory, the pneumatic tubes covered a 27-mile route, connecting 23 post offices. This network stretched up Manhattan’s east and west sides, from Bowling Green and Wall Street, all the way north to Manhattanville and East Harlem.<br>Anecdotal stories indicate that the system may have extended into the Bronx, with sandwich subs reportedly being delivered via pneumatic tubes from a renowned subway shop in the Bronx to downtown postal stations. Maps at the National Postal Museum show proposed extensions to the Bronx and other areas within Manhattan, many of which were never completed. The system even crossed boroughs into Brooklyn (using the Brooklyn Bridge), taking four minutes to take letters from Church Street near City Hall to the General Post Office in Brooklyn (now Cadman Plaza). The pneumatic tube mail system in New York City is the subject of the inaugural episode of The Untapped New York Podcast available on Apple Podcasts, Spotify, and all of your favorite podcast apps.<br>The system, which was located 4 to 6 feet below the city streets, was created and owned by private companies, to which the city paid rent and labor. According to The Smithsonian National Postal Museum, “Installation of the tubes was problematic, with previously laid pipes for sewage and gas limiting the size and thus the amount and kind of mail a pneumatic tube could carry. Water table levels also presented difficulties. Later, the New York City system was purchased and operated by the U.S. Postal Service. Using power from old-school electric motors, made by the likes of General Electric and Westinghouse, air pressure was created by rotary blowers and air compressors. Each canister was labeled on the outside with its destination, but all the tubes had to come out at each station. So if a canister was destined for another station, it would be sent back again into the tubes and on its way.<br>To feed my growing obsession with pneumatic mail, I went to Washington D.C.’s Smithsonian National Postal Museum where I met with Manda Kowalczyk an Accessions Officer at the Museum. She pulled all the items in the Postal Museum that are connected to the pneumatic tube mail systems in America. One of them you can see on a regular visit to the museum is the pneumatic tube mail canister which is on exhibit. This 24 inch long, 8 inch wide metal canister could carry somewhere between 400 and 600 letters. And, it could have definitely fit a small black cat.<br>Pneumatic Tube Mail system map of New York City from November 1937. Photo courtesy National Postal Museum, Smithsonian InstitutionThe Postal Museum also has several maps of the New York City pneumatic tube system, mostly from the 1930s and 40s. A 1947 map has some fun facts, including the time it took to send mail between the General Post Office and other stations, the number of canisters that went through the system daily (95,000), the pressure needed (3 to 8 lbs per inch), and the speed (5 tube carriers per minute and 30 mph). That year there were 26.969 miles of 2 way pneumatic tubes tubes. It even has the hours of operation: Weekdays from 5 AM to 10 PM, Saturday from 5 AM to 10 AM, and no service on Sundays and legal holidays. I love the thought of mail getting shot underground at 5 AM to arrive just time...