The MTA set off a major underground blast in Manhattan recently, as part of the enormous East Side Access project.

The MTA says the explosion was the last of its kind in the borough. To celebrate the feat, the agency released an awesome video featuring New York City's finest sandhogs blowing up a giant chunk of island bedrock.

The East Side Access project, which will reportedly cost $8.3 billion, is the largest construction venture in United States history and will create six miles of new underground tunnels, providing Long Island Rail Road trains access to Grand Central Station for the first time.

“This is a very significant milestone for the East Side Access project," President of MTA Capital Construction Dr. Michael Horodniceanu said. "The caverns are essentially now fully excavated. Much work remains to be done to build the platforms and tracks, and finish what is currently raw, cave-like space. But we now have a fully built shell in which all future work will take place.”

The project is expected to be completed in 2019.

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  • In this Tuesday, Jan. 29, 2013 photo, contractors work on the East Side Access project beneath midtown Manhattan, in New York. The East Side Access is one of three bold projects under New York that will expand what's already the nation's biggest mass-transit system by 2019. (AP Photo/Mary Altaffer)

  • In this Tuesday, Jan. 29, 2013 photo, contractors work on the East Side Access project beneath midtown Manhattan, in New York. The East Side Access is one of three bold projects under New York that will expand what's already the nation's biggest mass-transit system by 2019. (AP Photo/Mary Altaffer)

  • In this Tuesday, Jan. 29, 2013 photo, contractors work on the East Side Access project beneath midtown Manhattan, in New York. The East Side Access is one of three bold projects under New York that will expand what's already the nation's biggest mass-transit system by 2019. (AP Photo/Mary Altaffer)

  • In this Tuesday, Jan. 29, 2013 photo, contractors work on the East Side Access project beneath midtown Manhattan, in New York. The East Side Access is one of three bold projects under New York that will expand what's already the nation's biggest mass-transit system by 2019. (AP Photo/Mary Altaffer)

  • In this Tuesday, Jan. 29 2013 photo, contractors work on the East Side Access project beneath midtown Manhattan in New York. The East Side Access is one of three bold projects under New York that will expand what's already the nation's biggest mass-transit system by 2019. (AP Photo/Mary Altaffer)

  • In this Tuesday, Jan. 29, 2013 photo, contractors work on the East Side Access project beneath midtown Manhattan, in New York. The East Side Access is one of three bold projects under New York that will expand what's already the nation's biggest mass-transit system by 2019. (AP Photo/Mary Altaffer)

  • In this Tuesday, Jan. 29 2013 photo, contractors work on the East Side Access project beneath midtown Manhattan in New York. The East Side Access is one of three bold projects under New York that will expand what's already the nation's biggest mass-transit system by 2019. (AP Photo/Mary Altaffer)

  • FILE- In this July 17, 2008 file photo, a couple of sandhogs work in the East bound tunnel of the Metropolitan Transportation Authority's East Side Access project in New York. On Monday, July 23, 2012 the last of the 200-ton tunnel boring machines finished its mission and went quiet. The seven machine fleet dug 13 miles of new train tubes deep beneath New York City, boring through bedrock and creating 16 new tunnels in 4 ½ years of digging. (AP Photo/Mary Altaffer, File)

  • In this Wednesday, Jan. 23 2013 photo, a contractor works at the Second Avenue Subway construction project in New York. The Second Avenue Subway will eventually serve Manhattan's far East Side, from Harlem to the island’s southern tip. (AP Photo/Mary Altaffer)

  • In this Wednesday, Jan. 23 2013 photo, a contractor works at the Second Avenue Subway construction project in New York. The Second Avenue Subway will eventually serve Manhattan's far East Side, from Harlem to the island’s southern tip. (AP Photo/Mary Altaffer)

  • In this Wednesday, Jan. 23 2013 photo, Michael Horodniceanu, president of Capital Construction for the Metropolitan Transportation Authority, talks to The Associated Press about the Second Avenue Subway construction project in New York. The Second Avenue Subway will eventually serve Manhattan's far East Side, from Harlem to the island’s southern tip. (AP Photo/Mary Altaffer)

  • In this Wednesday, Jan. 23 2013 photo, contractors work at the Second Avenue Subway construction project in New York. The Second Avenue Subway will eventually serve Manhattan's far East Side, from Harlem to the island’s southern tip. (AP Photo/Mary Altaffer)

  • In this Tuesday, Feb. 5, 2013 photo, rush hour commuters crowd a subway platform at the Woodside station in Queens, N.Y. The station is a transfer point for passengers traveling on the Long Island Rail Road (LIRR) and going to Manhattan's East Side. The Second Avenue Subway construction will ease congestion at the station when it opens, giving the LIRR a stop on the East Side it now bypasses straight to Penn Station on the West Side. (AP Photo/Bebeto Matthews)

  • In this undated artist’s rendering provided by the Metropolitan Transportation Authority in New York, a lower Mezzanine elevator of the Second Avenue Subway in New York City is shown. The Second Avenue Subway is being built to ease rider congestion on Lexington Avenue trains. (AP Photo/Metropolitan Transportation Authority)

  • In this undated artist’s rendering provided by the Metropolitan Transportation Authority in New York, the Mezzanine node of the Second Avenue Subway at 46th Street in New York City is shown. The Second Avenue Subway is being built to ease rider congestion on Lexington Avenue trains. (AP Photo/Metropolitan Transportation Authority)

  • People wait at a bus stop on Second Avenue between East 23rd Street and East 22nd Street in New York Wednesday, Oct. 31, 2012. With the city's subways knocked out of service by superstorm Sandy, and a reduced number of city buses operating, New Yorkers are scrambling to commute to work. (AP Photo/Tina Fineberg)

  • In this Aug. 21, 2012, photo, construction workers hang tarp to block the view of damage following an intentional underground explosion on the Second Avenue subway project on East 72nd. (AP Photo/Bebeto Matthews)

  • Construction workers remove window display items near the shattered window of Kolb Art Gallery following damage from an intentional underground explosion on the Second Avenue subway project on East 72nd on Tuesday, Aug. 21, 2012. (AP Photo/Bebeto Matthews)

  • Workers prepare to secure damage following an intentional underground explosion on the Second Avenue subway project on East 72nd on Tuesday, Aug. 21, 2012. Blasting at the construction site shattered windows and sent smoke billowing up to the street. Metropolitan Transportation Authority spokeswoman Marjorie Anders says something went wrong Tuesday as contractors were blasting a tunnel for the Second Avenue subway. She says no one was injured. (AP Photo/Bebeto Matthews)

  • Dignitaries are seen covering their mouths and noses through a dust cloud created by a tunnel boring machine cutting through a solid rock wall, Thursday, Sept. 22, 2011 in New York. The Metropolitan Transportation Authority completed tunneling today for the first phase of the Second Avenue Subway when a tunnel boring machine (TBM) reached the Lexington Avenue-63rd Street station, breaking into the existing tunnel. The completion of tunneling marks a major milestone in the $4.45 billion project that will provide service from 96th Street to 63rd Street as an extension of the Q train. (AP Photo/Mary Altaffer)

  • A construction worker, also known as a sandhog, sprays water on the tunnel boring machine as it bores through a solid rock wall, Thursday, Sept. 22, 2011 in New York. The Metropolitan Transportation Authority completed tunneling today for the first phase of the Second Avenue Subway when a tunnel boring machine (TBM) reached the Lexington Avenue-63rd Street station, breaking into the existing tunnel. The completion of tunneling marks a major milestone in the $4.45 billion project that will provide service from 96th Street to 63rd Street as an extension of the Q train. (AP Photo/Mary Altaffer)

  • A construction worker, also known as a sandhog, climbs down from a hole created by a tunnel boring machine, Thursday, Sept. 22, 2011 in New York. The Metropolitan Transportation Authority completed tunneling Thursday for the first phase of the Second Avenue Subway after borer reached the Lexington Avenue-63rd Street station, breaking into the existing tunnel. The completion of tunneling marks a major milestone in the $4.45 billion project that will provide service from 96th Street to 63rd Street as an extension of the Q train. (AP Photo/Mary Altaffer)

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