St. Clair, IL: data center power outlook

Grid position at a glance

Serving utilities

AMEREN ILLINOIS COMPANY, CITY OF KIRKWOOD - (MO), CITY OF MASCOUTAH - (IL), CLINTON COUNTY ELEC COOP, INC, EGYPTIAN ELECTRIC COOP ASSN, MONROE COUNTY ELEC COOP, INC, SOUTHWESTERN ELECTRIC COOP INC - (IL), TRI-COUNTY ELECTRIC COOP, INC (IL), UNION ELECTRIC CO - (MO), VILLAGE OF FREEBURG - (IL)

ISO / market

MISO (Midcontinent Independent System Operator)

Highest grid access

345 kV

Substations in county

36

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

3 of 10 serving utilities: 1.6 to 11.6¢/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

11 projects, 2,114 MW

Proposed generation

155 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

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 Water already withdrawn locally, not water available for a new load.

Construction labor near site

83,834 employed in construction within ~120 km (30 of 31 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 St. Clair

What follows is a screening-grade read of St. Clair, Illinois, built only from named public datasets. Grid access in St. Clair extends to 345 kV, a high-voltage line class. The mapped layer packs 36 substations into St. Clair, a dense spread of options.

Interconnection over St. Clair runs through the MISO market (Midcontinent Independent System Operator) and its rules. For St. Clair, the rate shown is the state industrial average of 10.1 cents per kWh (EIA-861), a state figure and not a county-specific one. Beneath that state average, the utilities serving St. Clair that report an industrial rate span 3 of 10 serving utilities: 1.6 to 11.6¢/kWh, shown as context and never as the county rate.

The queue feeds show 11 projects for St. Clair, totalling 2,114 MW of requested capacity. EIA-860M records 155 MW planned or under construction for St. Clair. St. Clair sits under a balancing authority that eGRID puts at 981.982 lb CO2 per MWh.

St. Clair withdrew 36.74 million gallons per day for all uses in the USGS 2015 data, which counts demand, not headroom. About 83,834 people are employed in construction within a 120 km commute of St. Clair (BLS QCEW), which frames staffing distance rather than free labour.

For St. Clair, treat this as screening-grade county context useful for narrowing a search rather than settling a site. Taken together, the figures for St. Clair, Illinois describe the grid around a prospective site, drawn from public data with their gaps left visible on purpose. To move past screening in St. Clair, Illinois, a specific address needs its own interconnection study, which this page does not attempt. The figures for St. Clair, Illinois refresh as their public datasets do, and the exact sources and dates sit in the source log below this section.

Sources