Engine 31's firehouse at 87 Lafayette Street, as well as the nearby NYC jail, "the Tombs", was built on a large 48 acre, 60 foot deep former pond called "Collect Pond". It had originally been Manhattan's water source and a recreational area but early 1800 manufacturing had polluted the water and it was poorly filled in. Architect Napoleon LeBrun used wooden pilings for stability to build the large firehouse.
Collect Pond:
"The Collect Pond, or Fresh Water Pond, was a body of fresh water in Chinatown, lower Manhattan in New York City. For the first two hundred years of European settlement of Manhattan, Collect Pond was the main water supply for the growing city. It later became a jail site and is now a park...
The southwestern shore of the Collect Pond was the site of a Native American settlement known as Werpoes. A small band of Munsee, the northernmost division of the Lenape, occupied the site until the Dutch settlement of New Amsterdam was established. It is possible that members of this band were the participants in the famed sale of Manhattan (Manahatta) to the Dutch...
Wasteland:
In the 18th century, the pond was used as a picnic area during summer, and a skating rink during the winter. However, industries began to use the water and dump waste there. These included tanneries, breweries, ropewalks, and slaughterhouses... By the late 18th century, the pond was already considered "a very sink and common sewer".
The contaminated wastewater of these businesses flowed back into the pond, creating a severe pollution problem and environmental health hazard. Pierre Charles L'Enfant proposed cleaning the pond ... was rejected and it was decided to fill in the pond... The landfill was completed in 1811 and Middle class homes were soon built on the reclaimed land.
The landfill was poorly engineered. The buried vegetation began to release methane gas and the area, still in a natural depression, lacked adequate storm sewers. As a result, the ground gradually subsided. Houses shifted on their foundations, the unpaved streets were often buried in a foot of mud and mixed with human and animal excrement, and mosquitoes bred in the stagnant pools created by the poor drainage.
Solution:
...It was filled in from land removed from nearby Bayard's Mount, the highest hill in lower Manhattan. By 1813, the Collect Pond was virtually gone.
Several decades later, New York City obtained a new, plentiful supply of fresh water from the Croton Aqueduct. The neighborhood known as "Five Points", a notorious slum, developed near the former eastern bank of the Collect and owed its existence in some measure to the poor landfill job which created swampy, mosquito-ridden conditions on land that had originally had more well-to-do residents.
Most middle and upper class inhabitants fled the area, leaving the neighborhood open to poor immigrants that began arriving in the early 1820s. This influx reached a height in the 1840s, with large numbers of Irish Catholics fleeing the Irish Potato Famine.
The Tombs:
While the pond had been condemned, drained, and filled in by 1817, the landfill job was poorly done, and in a span of less than ten years, the ground began to sink. New York's jail, nicknamed "The Tombs", was built on Centre Street in 1838 on the site of the pond and was constructed on a huge platform of hemlock logs in an attempt to give it secure foundations. The prison building began to subside almost as soon as it was completed and was notorious for leaks in its lowest tier and for its general dampness. When the original Tombs building was condemned and demolished at the end of the century, builders sank enormous concrete caissons to bedrock, as much as 140 feet below street level, in order to give its replacement more secure foundations. This damp foundation was primarily responsible for its bad reputation as being unsanitary during the decades to come.
The design, by John Haviland, was based on an engraving of an ancient Egyptian mausoleum. The building was 253 feet 3 inches in length by 200 feet 5 inches wide and it occupied a full block, surrounded by Centre, Franklin, Elm (today's Lafayette), and Leonard Streets. It initially accommodated about 300 prisoners.
That structure was notorious for the damp conditions which resulted from being built on the landfill used to fill in the Collect Pond. The original building was replaced in 1902 with a new one on the same site connected by a "Bridge of Sighs" to the Criminal Courts Building on the Franklin Street side. That building was replaced in 1941 by one across the street on the east side of Centre Street with the entrance at 125 White Street, officially named the Manhattan House of Detention, though still referred to popularly as "The Tombs"...
It is still possible to ascertain the rough boundaries of the Collect Pond and original topography in the elevations of the streets in the area, with the lowest elevation being Centre Street which runs in the approximate center of the former pond.
http://en.wikipedia.org/wiki/Collect_Pond