A power plant with more than 800 engines is in public review in West Virginia. The state's Department of Environmental Protection (WVDEP) has finished its technical review of the air permit application for the Monarch Cloud Campus in Mason County, and comments are due on 30 October. A virtual public meeting follows on 29 October, WSAZ reported on 20 October after an information meeting held by the agency.
What the Application Lists
The plant would run apart from the traditional grid. According to WSAZ it consists of more than 800 primary engines, six natural gas heaters, 12 emergency generators and six diesel-powered firewater pump engines. WVDEP received the application in April and a revised version in May. Compute Atlas, a project tracker, counts 864 gas engines and 2.16 GW in the April filing and ties them to the Monarch Compute Campus, a data center it lists at 2,000 MW.
What the Review Does and Does Not Weigh
Terry Fletcher of WVDEP told the meeting that the permit limits operating hours and emissions and requires emission controls, with testing, monitoring and record-keeping to show compliance. It falls under the state's major-source programme, Prevention of Significant Deterioration, which models how the emissions could affect the surrounding area, residents, farmland and the river. It does not need a full environmental impact statement, and it does not weigh traffic, property values or the economics of the project. WSAZ printed no emission figures and no statement from the company.
The Engines Behind It
Caterpillar's January release describes the equipment for the same campus: a purchase agreement between American Intelligence & Power, Caterpillar and the dealer Boyd CAT for 2 GW of G3516 natural gas generator sets, paired with battery storage for fast load swings and with SCR emission controls. Deliveries are scheduled from September 2026 to August 2027, with 2 GW online in 2027 and a target of 8 GW at the site. The tracker's 2.16 GW and Caterpillar's 2 GW do not match exactly, and the sources do not explain the gap, so the engine count is best read as approximate. Data Center Census lists a target of 1 January 2027 for the start of operation.
Deliveries Before the Permit
By the dates in these sources, the first deliveries fall into the same weeks as the comment period, ahead of any permit decision. For a plant of this kind the permit conditions, namely operating hours, testing and monitoring, end up in the commissioning plan whatever the schedule says. Virginia now does something similar one engine at a time (our report), and the exhaust aftertreatment is the item both sets of rules come back to.
Anyone selling into a project like this should ask early which permit version the order was priced against.
Sources: WSAZ, Caterpillar, Compute Atlas, Data Center Census