Union, SD: data center power outlook

Grid position at a glance

Serving utilities

CITY OF AKRON - (IA), CITY OF BERESFORD, CITY OF ELK POINT, CITY OF HAWARDEN - (IA), CITY OF SOUTH SIOUX CITY, CLAY-UNION ELECTRIC CORP, MIDAMERICAN ENERGY CO, NEBRASKA PUBLIC POWER DISTRICT, NORTH WEST RURAL ELECTRIC COOP, NORTHEAST POWER, NORTHERN STATES POWER CO - MINNESOTA, SOUTHEASTERN ELECTRIC COOP INC - (SD), UNION COUNTY ELECTRIC COOP INC, WAPA-- WESTERN AREA POWER ADMINISTRATION, WOODBURY COUNTY RURAL E C A

ISO / market

SPP (Southwest Power Pool)

Highest grid access

345 kV

Substations in county

20

Industrial retail rate

8.7¢/kWhState-level EIA-861 industrial average. The map colours by this, not by a per-county rate.

Per-utility rates in county

4 of 15 serving utilities: 1.9 to 9.4¢/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

None on record

Proposed generation

None on file (EIA-860M)Units 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

872 lb CO2/MWh

Water withdrawals

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 Water already withdrawn locally, not water available for a new load.

Construction labor near site

22,800 employed in construction within ~120 km (28 of 29 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 Union

Everything here about Union, South Dakota comes from public federal and state records, with the gaps left visible. Union reaches 345 kV, a high-voltage transmission class, at its strongest mapped point of grid access. With 20 substations mapped, Union has a moderate spread of interconnection points.

Union falls inside the SPP market (Southwest Power Pool), which governs how its interconnection requests and capacity move. The rate for Union is the 8.7 cents per kWh state industrial average (EIA-861), the same figure the map colours by. Across Union, reported per-utility industrial rates cover 4 of 15 serving utilities: 1.9 to 9.4¢/kWh, offered only as context beneath the state figure.

The covered queue feeds list nothing for Union, South Dakota, which may be quiet or simply uningested. Nothing is on file for Union, South Dakota in EIA-860M as planned or under construction, which counts as a measured zero. The balancing authority covering Union carries a grid carbon intensity of 871.526 lb CO2 per MWh in eGRID.

Reported freshwater withdrawals for all uses in Union are 8.08 million gallons per day in the USGS 2015 compilation, existing demand rather than water free for a new load. Around Union, some 22,800 people work in construction within about a 120 km commute (BLS QCEW), a measure of reach, not of available crews.

These numbers for Union are screening-grade context for the whole county, drawn from public data with the gaps left visible. Read the figures for Union, South Dakota together rather than one at a time: grid access matters less without substations near it, and a quiet queue reads differently inside an organized market than outside one. The next step for Union, South Dakota is an address-level interconnection study; the county figures here only narrow where to look. For Union, South Dakota, the source log below records where each figure comes from and when it was pulled, keeping the provenance visible.

Sources