ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins71% CONFIDENCEOverall confidence: 71%How well the pin's source and references back up its dates.Weighted average of how firmly 6 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
Longroad said in January 2026 that construction would start in 2027 and operation in 2029 (Western Mass News[5], 12 Jan 2026; MassLive via Fire Engineering[4], 13 Jan 2026); ISO-NE queue 1365 lists a proposed completion of 30 June 2029.Longroad Energy's Agawam Energy Center is a 250 MW, four-hour lithium-ion battery at 769 Silver Street, a former lumber yard in Agawam, Massachusetts, which the developer described in January 2026 as a multi-hundreds-of-millions-of-dollars investment (no figure published), with construction planned for 2027 and operation in 2029.
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