Source: "Chambers Street Station, or Sec. #1 of Route #9-0, BMT Division" by David E. Rogoff, in
NY Division Bulletin, Vol. 2, No.3, July-August 1959.
A discussion regarding the very interesting map will hopefully follow in the future.
This hand drawn map appeared in an early edition of the NY Bulletin many years ago. The New York Municipal Building and the large subway station underneath have interesting facts about them and they are tied somewhat with an interesting transport policy at the time. Construction started in 1907 on the building but the station contractor experienced difficulty due to a water and soil condition. Construction of the station had to be stopped but resumed in 1911. It seems that building construction took place before the final plan for the station was decided upon. More about this in the future....the building opened in 1914.
Notice the arch in the Municipal Building. The building is separated into two wings, a north and South Wing. I believe the south wing is 1 Centre Street while the north wing is 100 Centre Street. The south wing has a arched roof arcade at street level that leads to a mezzanine. A similar arcade existed on the north side as well. In 1937 and 1938, a new mezzanine and street entrances were opened at Reade Street, at Foley Square. This is a very picturesque area of court houses that appear as backdrops on many criminal TV shows. The former north arcade was closed of and sealed. City offices or stores are found now at street level on the north side of the building and the underground section is now an archive. When you enter at the north entrance, if you look near the City Store, you can see glass circles imbedded in the sidewalk that provides natural light to the archive.