ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins65% CONFIDENCEOverall confidence: 65%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
Happened as dated, per the source[1]: "Repairs were completed in October 1978."Engineers quietly finished weeks of overnight welding that fixed a hidden wind-bracing flaw in Manhattan's Citicorp Center, averting a possible collapse.
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