Data center campus · 100 Water St., Holyoke (vacant mill in the Flats), Hampden County, Massachusetts
Chestnut River Power data center (100 Water St., Holyoke)
Stalled
as of June 19, 2026
A proposed 20 MW reuse of a vacant Holyoke mill prompted the city's June 2026 ban on new data centers; the developer had not filed permits or bought the building. Also known as: Chestnut River Power Data Center.
Power20MW reported · stated
Who is behind it
ProjectChestnut River Power data center (100 Water St., Holyoke)Also: Chestnut River Power Data Center
Developer and teamChestnut River Power and Infrastructure
End userNot found in the recordsNot yet named in any record or credited report we have found.
The record, newest first
Chestnut River said it was reviewing the decision and was not ruling out the project. (Athol Daily News, June 19, 2026)
The City Council voted 9-4 for a citywide zoning ban on AI data centers over 12 MW, exempting the existing Massachusetts Green High Performance Computing Center; the mayor later signed it. (Athol Daily News, June 19, 2026; The Shoestring, July 2, 2026)
Conflicts and open questions
- Included as a notable smaller contested proposal (about 20 MW).
- The Shoestring reports the building is still owned by Green Thumb Industries.
- The Athol Daily News describes the ban as covering data centers over 12 MW; The Shoestring gives 12 MW as the MGHPCC's permitted peak draw.
The full record
- Status note
- Smaller contested project, below the tracker's 50 MW floor: no permits were filed and the city then banned new data centers.
- Power note
- 20 MW per the developer; Mayor Joshua Garcia put it at 21 MW.
- Evidence
- News reports; primary records not yet obtained
- Size class
- Under 50 MW (outside main scope; kept for completeness)