ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins63% CONFIDENCEOverall confidence: 63%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidence
Dated to the end of 2018 because the sources give only a period: the east tower opened "late 2018", completing the pair (the west tower opened in April 2017). The skybridge itself was installed from January 2016.[1]Developer JDS Development Group and architects SHoP completed the American Copper Buildings on Manhattan's East River in 2018, two leaning towers joined by a three-storey glass skybridge.
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