it had given 35 tours by September 2018. In advance of the planned deconstruction of 270 Park Avenue above East Side Access, the MTA and 270 Park Avenue's owner JPMorgan Chase signed an agreement in July 2019, in which JPMorgan agreed to ensure that the deconstruction of 270 Park Avenue would not disrupt the timeline of East Side Access. Queens side Previous work extending subway service through the upper level of the 63rd Street Tunnel to lines in Queens also extended the lower level to a point west of Northern Boulevard, across from the Sunnyside Yard. Work in Queens included extending the tunnel under Northern Boulevard and boring four tunnels under Sunnyside Yard. This was a particularly delicate and expensive task because of the elevated BMT Astoria Line and the underground IND Queens Boulevard Line directly above. The existing tunnel bellmouth west of Northern Boulevard was expanded to serve as the staging area for the Manhattan work, bringing in workers, equipment and supplies, and bringing out the muck and debris from excavation. A temporary narrow-gauge railway and a conveyor belt system were constructed behind the tunnel boring machines (TBMs) and through the 63rd Street Tunnels to the Queens bellmouth. Due to its shape, the Queens work site was nicknamed the "Q-tip". Pile Foundation Construction Company built an $83 million cut structure, which extends the tracks under Northern Boulevard into the Sunnyside Yard. It created an area that served as the launch chamber for soft-bore Queens tunnels that would connect the 63rd Street line to the main LIRR branches, and an interlocking and emergency exit and venting facility. The cut was then covered with a deck. In August 2009, Perini Corp. was awarded a $144 million contract to reconfigure the Harold Interlocking railway junction, increasing its capacity to accommodate trains bound for Grand Central Terminal, and to construct new yard lead tracks to allow trains to enter the storage yards. Smaller contracts for structural work, environmental monitoring, and data measurement were also awarded. Some Amtrak buildings in Sunnyside Yard were demolished to make room for the East Side Access portals in Queens. In September 2009, the MTA awarded Granite-Traylor-Frontiere Joint Venture a $659.2 million contract to use two custom-built 500-ton slurry TBMs to create the tunnels connecting the LIRR Main Line and the Port Washington Branch to the 63rd Street Tunnel under 41st Avenue. The four tunnels, with precast concrete liners,