SIGNALDATAInsights. For the People.
Preview
Data center campus · Section 15, Harmony Township, about 7 miles northeast of Casselton (off 32nd Street SE and 160th Avenue SE, near the Bison Substation north of Mapleton), Cass County, North Dakota

Harmony Energy Park

Proposed as of Oct. 22, 2026

Geronimo Power's proposed 540 MW data center park on a 640-acre section northeast of Casselton. It would sit next to the company's solar and battery projects at the Bison Substation and is awaiting a Harmony Township permit while the township weighs moratoria. Also known as: Geronimo Power Harmony Township data center.

Cite← North Dakota data centers
Adams CountyBarnes CountyBenson CountyBillings CountyBottineau CountyBowman CountyBurke CountyBurleigh CountyCass CountyCavalier CountyDickey CountyDivide CountyDunn CountyEddy CountyEmmons CountyFoster CountyGolden Valley CountyGrand Forks CountyGrant CountyGriggs CountyHettinger CountyKidder CountyLaMoure CountyLogan CountyMcHenry CountyMcIntosh CountyMcKenzie CountyMcLean CountyMercer CountyMorton CountyMountrail CountyNelson CountyOliver CountyPembina CountyPierce CountyRamsey CountyRansom CountyRenville CountyRichland CountyRolette CountySargent CountySheridan CountySioux CountySlope CountyStark CountySteele CountyStutsman CountyTowner CountyTraill CountyWalsh CountyWard CountyWells CountyWilliams CountyHarmony Energy Park · Proposed · 540 MW
Power540MW reported · stated
Site640acres

Who is behind it

ProjectHarmony Energy ParkAlso: Geronimo Power Harmony Township data center
Developer and teamGeronimo Power
End userNot found in the recordsNot yet named in any record or credited report we have found.

The record, newest first

  1. Harmony Township canceled a scheduled hearing and vote on six proposed 24-month moratoria, which covered data centers, solar, wind, battery storage, gas generation and transmission. Opponents had challenged the published notice as short of the 15 days state law requires, and the township said future meetings would be properly noticed. Geronimo's CEO offered to pause the data center application for six months. (KFGO (The Mighty 790), Oct. 22, 2026; Valley News Live, Oct. 13, 2026)

  2. A complaint was filed with the North Dakota Attorney General's office. It alleged that the township broke open-meetings law at its Oct. 20 meeting, including in how public comment was limited and in hiring the law firms by unrecorded voice votes. It also said the notice for the moratorium hearing was published two days short of the 15 days state law requires. No response from the Attorney General's office had been reported. (KFGO (The Mighty 790), Oct. 21, 2026; KVRR, Oct. 21, 2026)

  3. Harmony Township supervisors voted to retain the Fargo firm O'Keeffe O'Brien Lyson as local counsel and the Minneapolis firm Eckland & Blando as special litigation counsel. (KFGO (The Mighty 790), Oct. 20, 2026; KFGO (The Mighty 790), Oct. 21, 2026)

  4. KFGO asked Geronimo Power CEO Blake Nixon whether the company would sue if the township adopted the moratorium or denied the permit. He did not rule out legal action. He said the project cannot be built without Harmony Township's permit, and that a 24-month data center moratorium would signal that the area is closed for business. (KFGO (The Mighty 790), Oct. 14, 2026)

  5. At a public meeting in Wheatland, Geronimo said the buildings would stand at least a mile from any home and about 80% of the site would remain green space. (Valley News Live, Oct. 13, 2026)

  6. Geronimo filed a conditional use permit application with Harmony Township for two main data center buildings with up to 540 MW of initial service. About 160 acres of the 640-acre section would be developed. (Geronimo Power, Oct. 22, 2026; KFGO (The Mighty 790), Oct. 14, 2026; North Dakota Monitor, Sept. 29, 2026)

  7. Geronimo said it was in the early stages of exploring a data center in Harmony Township, near communities around its Harmony Solar project. It had not yet filed a permit. The company also confirmed it holds a land purchase option in Durbin Township that is not tied to a specific project. (Valley News Live, Sept. 10, 2026)

Conflicts and open questions

  • Coordinates approximate, placed about 7 miles northeast of Casselton per Valley News Live.
  • Water: according to the company, about 15,000 gallons a day on average and about 20,000 at peak, with closed-loop cooling.
  • Geronimo says the site would run on new generation. The North Dakota Monitor reports a 200 MW solar farm under construction next to the Bison Substation and a proposed 200 MW battery facility. Otter Tail Power has a large-load tariff under review at the PSC.
  • Geronimo has offered a benefits package it values at about $140 million (KFGO).
  • Before the filing, on July 21, 2026, the township changed its zoning rules. It raised the exterior noise limit and dropped some farm buildings from the one-mile setback.

The full record

Status note
Geronimo filed a conditional use permit application with Harmony Township on Sept. 15, 2026, and nothing has been approved. On Oct. 22, 2026 the township canceled its hearing and vote on proposed 24-month moratoria, and Geronimo offered to pause its application for six months.
Evidence
Primary public records
Size class
50 MW or more (tracker scope)
Map position approximate, from the reported address or area. Updated Oct. 17, 2026.