. Guide leaflet. oner and Son Construction Company started work onthis huge undertaking. The site faces the Hudson River estu-ary, which is a drowned river channelfilled for the most part with sand, clay,and silt, to a depth near mid-channel, at32d Street, of approximately 350 off shore from the pier sitesshow the depth of the river water to be 60feet. The concrete wall on the old bulk-head Hne, established April 25, 1890, bythe Secretary of War and which has beenfor the most part removed, extended in anearly north-south direction, about 325feet west of the bulkhead wall of the
. Guide leaflet. oner and Son Construction Company started work onthis huge undertaking. The site faces the Hudson River estu-ary, which is a drowned river channelfilled for the most part with sand, clay,and silt, to a depth near mid-channel, at32d Street, of approximately 350 off shore from the pier sitesshow the depth of the river water to be 60feet. The concrete wall on the old bulk-head Hne, established April 25, 1890, bythe Secretary of War and which has beenfor the most part removed, extended in anearly north-south direction, about 325feet west of the bulkhead wall of the newslips. A westwardly sloping bed rocksurface served as the foundation for thisold bulkhead wall. The footing consistedof bags of concrete laid by divers on thenatural rock. The wall itself consisted ofhuge blocks of precast concrete set uponthe concrete bags. When removed fromthe pier slips, the concrete bags and theblocks showed no signs of deteriorationalthough they had been submerged in 168 NATURAL HISTORY 1. brackish water for more than forty part of this wall which extendedacross the site of Pier 90, has been leftstanding and will be used as part of thefill required to complete the pier. Each of the new piers will consiststructurally of two parts, namely: (a)the outermost part made of timber pilesdriven into the river silt, and (b) thelandward part composed of natural rock,and rock fill retained by concrete the southernmost pier, No. 88, thepile part is 795 feet long, the naturalrock and fill part 305 feet; for pier 90,the parts are 715 and 385 feet, respectively;and for pier 92, 655 and 445 feet, respec-tively. Both parts of each pier will have aconcrete deck. Above this deck willappear a two-story standard pier-shedsuperstructure. It willbe supported by concretefootings which will beindependent of the concretecross-wall fire stops willappear at intervals of 140feet on the timber por-tion of the piers. SITE OF NEW 1100-FOOT PIERS, OCT
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectnatural, bookyear1901
