Johnson, IL: data center power outlook

Grid position at a glance

Serving utilities

AMEREN ILLINOIS COMPANY, EGYPTIAN ELECTRIC COOP ASSN, SOUTHEASTERN IL ELEC COOP, INC, SOUTHERN ILLINOIS ELEC COOP

ISO / market

MISO (Midcontinent Independent System Operator)

Highest grid access

345 kV

Substations in county

20

Industrial retail rate

10.1¢/kWhState-level EIA-861 industrial average. The map colours by this, not by a per-county rate.

Per-utility rates in county

2 of 4 serving utilities: 1.6 to 10.4¢/kWhLowest to highest industrial rate among the utilities serving this county (EIA-861 Sales to Ultimate Customers). A spread, not the county’s rate, and it covers only the serving utilities that report one.

Interconnection queue

5 projects, 800 MW

Proposed generation

36 MW planned or under constructionUnits filed with EIA as planned or under construction (Form EIA-860M). Declared intent from the federal inventory, not the interconnection queue and not guaranteed capacity.

Grid carbon intensity

982 lb CO2/MWh

Water withdrawals

1.6 Mgal/dAll uses, freshwater. Water already withdrawn locally, not water available for a new load.

Construction labor near site

18,270 employed in construction within ~120 km (36 of 43 counties reporting)A large build needs hundreds of skilled construction workers on site for one to three years. A county with few of them within commuting range means bussing crews in, per diem, and housing, which is real cost and schedule risk. This counts people employed in construction within about a 120 km drive (BLS QCEW), summed across nearby counties. It is not labor known to be available: most are already committed to other projects, and no public data reveals who is free.

Grid conditions in Johnson

Read on for the public power picture of Johnson in Illinois, assembled for data center siting. At 345 kV, Johnson carries high-voltage transmission at its strongest mapped point. Johnson contains 20 mapped substations, a moderate footprint spread across the service area.

Wholesale activity over Johnson clears through the MISO market (Midcontinent Independent System Operator), whose footprint sets how interconnection requests and capacity are handled. Johnson carries the state industrial average retail rate of 10.1 cents per kWh from EIA-861, applied statewide. For Johnson, the per-utility spread is 2 of 4 serving utilities: 1.6 to 10.4¢/kWh, which qualifies but never replaces the state average.

Johnson carries 5 projects in the interconnection queue, totalling 800 MW of requested capacity. In Johnson, 35.9 MW is filed as planned or under construction in the federal EIA-860M inventory. In eGRID, the balancing authority over Johnson shows 981.982 lb CO2 per MWh.

For Johnson, the USGS 2015 compilation records 1.57 million gallons per day of all-use freshwater withdrawals, not water available to a new load. Johnson sits within commuting range of roughly 18,270 construction workers (BLS QCEW, about 120 km), most already committed elsewhere.

Every figure for Johnson here is screening-grade and describes the county as a whole, not any single parcel within it. None of the figures for Johnson, Illinois settles a site on its own; each one qualifies the others, and all of them come from public federal and state datasets. Settling a site in Johnson, Illinois requires a study of the specific parcel, a step beyond the county-level picture drawn here. Sources and data dates for Johnson, Illinois are logged directly below, so each figure on this page can be traced back to its public dataset.

Sources