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Gridcensus

EC Coal Pennington County

Greenfield

Pennington County, South Dakota · SPP

DC Readiness
68.4
Good / 100

EC Coal Pennington County is a greenfield datacenter candidate site in Pennington County, South Dakota, interconnecting through SPP. It screens at 68.4/100 DC Readiness and a 1.0 yrs average interconnection-queue wait.

Power & interconnection

LMP zoneSPP_NORTH
Wholesale LMP$21.13/MWh
Utility commercial rate0.14¢/kWh
UtilityBLACK HILLS POWER, INC.investor ownedfavorable to large load · terms ≥ 50 MW

Speed to power

Interconnection outlookFavorable
≈ 0.6 yrs typical interconnection wait

Shorter queues and healthier completion here — a faster path to energization than the national norm.

ISO / RTO regionSPP
Queue depth3
Avg queue wait1.0 yrs
Recent queue wait0.6 yrs
Completion rate22%
Withdrawal rate78%

Connectivity

Nearest IXPGolden West Rapid City Skyline Facility
IXP distance4.6 mi
Fiber providers7
Fiber coverage35.5%
Nearest cloud providerGCP
Nearest cloud regionus-central1
Cloud region distance418.6 mi

Site characteristics

Site typeGreenfield
Land contactPennington County County Assessor
Land owner typeprivate
Buildability92.0/100
Land cover (NLCD)Developed, Low Intensity
Former usecoal adjacent

Risk & environment

Environmental constraintLow (30/100)
Flood zoneZone X
Water stress (WRI)1.20
Wetlands (NWI)Clear
Critical habitatClear
Superfund nearbyPresent
Superfund siteRPM ASSOCIATES INC
Hazard sub-score68/100
Construction cost index81.3 (avg 100)

Location context

Nearest datacenterGolden West Rapid City Skyline Facility
DC distance4.6 mi
Nearest rail1.4 mi
Nearest gas pipeline1.2 mi
Nearest fiber route154.7 mi
County hazard (FEMA NRI)Relatively Low (22)
DC tax incentiveYes (no_income_tax)
Commercial electricity13.55¢/kWh
Industrial electricity13.16¢/kWh
Cooling degree days700
Heating degree days7,300
Land price / acre$1,513

Regulatory climate

Moderatestate posture · as of 2026-08

No notable statewide DC restriction on record; confirm local zoning and utility tariffs.

DC tax incentiveNo / suspended

Incentive detail: No state corporate income tax; no personal income tax; no personal property tax.

Site location

◆ Loading map…
≥ 7560–7540–60≤ 40
This site + 8 nearby

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Full DC Readiness breakdown

All 13 weighted sub-scores (0–100) behind the composite DC Readiness score.

Power availability20%
30
Speed to power20%
71
Fiber connectivity12%
80
Energy cost10%
88
Water risk7%
81
Natural hazard6%
68
Buildability7%
92
Labor market4%
50
DC cluster4%
80
Land / acreage3%
52
Construction cost3%
82
Gas pipeline2%
96
Tax incentive1%
100
Climate / cooling1%
90

Nearby comparable sites

Other scored datacenter candidate sites in Pennington County, ranked by DC Readiness.

Sites near EC Coal Pennington County
SiteTypeVoltageCapacityQueue waitScore
EC Coal Pennington CountyGreenfield——1.0 yrs70.6
EC Near Ben FrenchGreenfield——1.0 yrs69.6
SOUTH RAPID CITYSubstation-Adjacent230 kV300 MW3.3 yrs69.0
EC Near Ben FrenchGreenfield——1.0 yrs68.9
EC Near Ben FrenchGreenfield——1.0 yrs68.3
EC Near Ben FrenchGreenfield——1.0 yrs68.3
EC Coal Pennington CountyGreenfield——1.0 yrs68.2
RAPID CITY DC TIESubstation-Adjacent230 kV300 MW3.3 yrs68.0

Dataset updated . Screening estimates derived from public data sources.

Figures are screening estimates derived from public infrastructure data. Catalogued capacity reflects theoretical candidate capacity, not deliverable or committed interconnection. Confirm all values with the utility, ISO, and on-the-ground due diligence.

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Every site and score for EC Coal Pennington County, Pennington County is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.