A press release from WMATA
: "The west entrance of the Navy Yard Metrorail station
on the Green Line will close starting Tuesday, Jan. 2, 2007
, through April 2008 due to construction related to the expansion of the station entrance. The east entrance on the northwest corner of M Street and New Jersey Avenue, SE, will remain open. The $20 million construction project is to increase the station's entrance capacity due to its close proximity to the new ballpark that is currently under construction. The west entrance at Half and M Streets, SE, is one block north of the future Nationals' ball park scheduled to open in April 2008. The entrance expansion includes increasing the number of fare gates and fare card machines; relocating the west entrance to the street level; installing a new elevator from the street level to the mezzanine; and installing a new stairway between the mezzanine and the platform. The present mezzanine's capacity can move up to 5,000 passengers per hour. The plan for the new mezzanine is to increase the ability to move 15,000 passengers per hour through the station. Funding for this project is being provided by the District of Columbia in anticipation of being refunded by the federal government." At the same time, Monument Realty's 55 M Street
275,000-sq-ft office building will be under construction above the entrance, as will Monument's other two offerings along Half Street, a 200-key W Aloft hotel and a 350-unit residential building at Half and N. The Monument projects will not be finished before 2009, although they hope to get the three levels of parking (700 spaces) and perhaps some of the 50,000-sq-ft of ground floor retail completed before Opening Day 2008.