Brookfield Properties has announced that it will develop a three-acre rail yard between Hudson Yards and Penn Station. Brookfield will begin building a platform over the rail yards in June. The 5.4 million square feet of new office and mixed-use space will be called Manhattan West. The first tower at the $600 million development, which runs from 31st to 33rd Streets and Ninth Avenue to the Lincoln Tunnel, could be built by 2013. Brookfield is one of five developers to bid on Hudson Yards.