The grid backdrop

Every megawatt figure about a data center is a number over a denominator, and the denominator is somebody's grid. This is that grid for this site: who delivers the retail power, which balancing authority keeps it in balance, who regulates the rate — each one cited, not asserted — and how much electricity those systems already move in a year. It describes the place, so it stands whether or not a campus is ever built here. The prose companion is Economics — demand & public benefits.

The electric-service chain

What those systems already carry

The load denominators, connector-sourced from the EIA. These are the figures a campus share is expressed against — and the only copy of them: the load report divides by this same feed rather than its own constants.

Indiana Michigan Power Co is Investor Owned (EIA-861). It serves ~482,283 retail customers.

Its bundled standard-service customers pay an average of 11.62¢/kWh. That is a cohort price — the customers who never shopped for a competitive supplier, which skews residential — not the utility's all-sector average, and not the rate a large industrial or data-center load pays. EIA-861 2024 Sales to Ultimate Customers, Indiana Michigan Power Co (#9324), IN; COHORT PRICE — bundled (standard-service-offer) revenue/sales only. Delivery-only rows are excluded because they carry just the wires charge (generation is paid to a competitive supplier), but the remaining bundled cohort is the customers who never shopped, which in a restructured state skews residential. NOT the utility's all-sector average and NOT an industrial/data-center rate — for that, compare the all-sector price EIA ELEC.PRICE.IN-ALL.A

The disclosed campus draws ~117 MW, which at a 0.9 load factor is ~922 GWh/yr — the numerator of every share in the table above. That draw is itself an [inference].

Grid foundation layer (#94). The state, Indiana Michigan Power Co, and PJM denominators are now all connector-sourced — Indiana retail from EIA (shared with #91), per-utility retail from the EIA-861 file, and PJM annual demand from EIA-930. The campus is a single load equal to a material fraction of its serving utility's entire retail sales. Denominator vintages differ (utility EIA-861 2024 / BA EIA-930 2024 / state EIA 2025 (1-year spread)): the EIA state seriesid route publishes ahead of the EIA-861 bulk file and the EIA-930 annual sum, so the three shares are not struck against one common year.

The campus against consumer prices

How the campus's demand sits against the state's whole retail electricity market. The two figures below are the defensible headline — both EIA-cited, both plain division.

Carried caveats

• The demand share and households-equivalent are the robust, EIA-cited headline; the price-pressure band is a STYLIZED screening sensitivity, not a forecast of retail bills.
• The campus buys at wholesale/industrial rates, not the residential price shown — residential price is the consumer-impact reference, not the campus bill.
• Facility draw is itself an assumption-laden estimate (air-permit IT load x PUE band, #87); the load factor and transmission coefficient are assumptions.

Method: facility draw (PUE-adjusted, #87) -> annual GWh -> share of EIA state retail sales + households-equivalent; price pressure = demand share x transmission coefficient (STYLIZED screening sensitivity, not a forecast)