Harmony Energy Park (Geronimo Power data center)

Timeline from the record

Newest first. Record entries come from the filings and reports the registry cites. Coverage entries are headlines from publisher feeds we monitor daily, linked to the outlet; last checked September 14, 2026.

1. September 2026

   Proposed
   Geronimo Power filed a conditional use permit application with Harmony Township for a data center near the Bison Substation north of Mapleton Source: KFGO / North Dakota Monitor

Opposition and litigation at this site

Yes. Harmony Energy Park (Geronimo Power data center) in Mapleton, Cass County, North Dakota is contested. Hearings, public comment, petitions, or organized opposition are on record, and no lawsuit has been filed so far. Residents are divided, and some object to building on prime farmland.

How the community has taken it

Reception is a sourced signal, not an editorial judgment: contested means active public debate is on record, with hearings, petitions, or organized opposition, without litigation.

Residents are divided, and some object to building on prime farmland. Harmony Township proposed 24-month moratoria covering data centers, solar, wind, storage, gas generation and transmission. The Oct. 22, 2026 hearing and vote were cancelled over a notice defect (13 days' notice against the required 15). Geronimo offered a six-month pause on its application. Separately, a conflict-of-interest question was raised over a former supervisor who agreed to sell land to Geronimo for the site.

Source: KFGO

Power and water

540 MW at peak demand. Geronimo says new generation would power the site: a 200 MW solar farm under construction next to the Bison Substation, a proposed 200 MW battery facility, wind and possibly natural gas. Otter Tail serves the area, and its large-load tariff is before the ND PSC. Minnkota says its planned ~400 MW gas plant in the same township is not meant to serve this data center.

Peak demand of about 20,000 gallons per day, per the developer; closed-loop cooling described as similar to a car radiator.

Notes on the record

Proposed powered data park in Section 15 of Harmony Township, about seven miles northeast of Casselton and north of Mapleton, near the Bison Substation (off 32nd St SE and 160th Ave SE). It would have two main buildings set at least a mile from any home on a ~640-acre footprint, about 80% of which is expected to stay green space. Construction would take two to four years. No end user is named. Coordinates are the Mapleton town point (approximate). Geronimo also holds a land option in neighboring Durbin Township; it is not recorded separately because no project there has been filed.

Other sites within 30 miles

Distances are between recorded coordinates, many of which are a city or county centroid, so treat them as approximate. Cumulative load on one utility and one aquifer is the question a planning commission rarely asks.

• Applied Digital Polaris Forge 2 · Harwood · Applied Digital Corporation9 mi · Under construction · 200 MW · Contested

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