On January 27, 2016, the final major contract for the construction of East Side Access was awarded to Tutor Perini Corporation. The contract was for the construction of four railroad platforms and eight tracks for the new Grand Central Terminal. The first tracks inside the 63rd Street Tunnel were laid in September 2017. The pre-cast platforms inside Grand Central Terminal were completed in May 2018, followed by the completion of the tracks in August 2018. The MTA also started installing escalators between the lower concourse and the platform mezzanine. Beginning in April 2018, the MTA began conducting site tours of the project; 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.