Work in Progress: Photos from NYC's 7 Line Extension

The future 34th Street Station of the #7 line extension (photo courtesy of MTA Capital Construction's Facebook page)

Even subway construction projects share on Facebook.

New York's MTA regularly posts updates on megaprojects on its Facebook page, and the update to the #7 line caught our eye.

The #7 train currently goes between Manhattan's Times Square and Flushing, Queens. As part of the redevelopment of Hudson Yards -- a stretch of land on Manhattan's far West Side -- the city has been working on extending the subway line southwest to 11th Avenue and 34th Street.

Earlier this year, MTA chairman Joe Lhota said item  number 1 on his wish list is extending the line even further south to 23rd Street and 11th Avenue. But here's what he said won't happen: extending it across the Hudson River to New Jersey -- something Mayor Bloomberg had put some money into studying last year.

Ventilation building for the 7 Line extension at "Site K" near the Javits Center (photo courtesy of MTA Capital Construction's Facebook page)

According to the MTA, the $2.4 billion project will open for service in June 2014 -- later than originally planned.

The 7 line extension's ventilation building at "Site L" at 41st Street and Dyer Avenue in Manhattan (photo courtesy of MTA Capital Construction's Facebook page)

You can watch a video about the project below.