The Manhattan West development was started this week by Brookfield Properties. The 4.5 billion dollar project will stretch along Ninth Avenue and Dyer Avenue, from West 31st to West 33rd streets. A platform will be built which two of the office towers will sit on. In order to build the platform over the rail yard, a series of 16 bridges must be made first. The platform alone will cost 680 million dollars. The third tower, which will be utilized for retail and residential housing, will be built on land. A 1.5 acre public space will also be included where pedestrians may congregate. The entire project is set to be available for tenants by 2016.