(This story has been amended as follows: The amount of retail space that is planned to date for the entire project is about 861,000 sq ft; that is 750,000 sq ft for the Eastern Rail Yard, 100,000 sq ft for the Western Rail Yard, as well as a planned 11,000-sq-ft retail pavilion. Also, Tishman Construction Co's prior work with Related Cos. includes the MiMa building.)