Greenfield (ROCKY REACH - MAPLE VALLEY)

Greenfield

King County, Washington · WECC

DC Readiness
59.8
Good / 100

Greenfield (ROCKY REACH - MAPLE VALLEY) is a greenfield datacenter candidate site in King County, Washington, interconnecting through WECC. It screens at 59.8/100 DC Readiness with a catalogued 600 MW of candidate capacity and a 1.7 yrs average interconnection-queue wait.

Power & interconnection

Nearest substationROCKY REACH
Substation voltage345 kV
Available capacity600 MW
Utility commercial rate0.09¢/kWh

Speed to power

ISO / RTO regionWECC
Queue depth74
Avg queue wait1.7 yrs
Recent queue wait1.0 yrs
Completion rate17%
Withdrawal rate84%

Connectivity

Nearest IXPColocation Northwest - Bellevue
IXP distance19.9 mi
Fiber providers19
Fiber coverage47.5%
Nearest cloud providerAzure
Nearest cloud regionwestus2
Cloud region distance90.2 mi

Site characteristics

Site typeGreenfield
Parcel ownerPUGET SOUND ENERGY INC
Land owner typeprivate
Buildability50.0/100
Land cover (NLCD)Mixed Forest

Risk & environment

Flood zoneZone X
Water stress (WRI)1.80
Wetlands (NWI)Clear
Critical habitatClear
Superfund nearbyClear
Hazard sub-score72/100
Construction cost index123.3 (avg 100)

Location context

Nearest datacenterColocation Northwest - Bellevue
DC distance19.9 mi
Nearest rail4.7 mi
Nearest gas pipeline12.8 mi
Nearest fiber route39.0 mi
County hazard (FEMA NRI)Relatively Moderate (28)
DC tax incentiveYes (sales_tax_exemption)
Commercial electricity8.87¢/kWh
Industrial electricity7.33¢/kWh
Cooling degree days300
Heating degree days5,000
Land price / acre$38,716
See all datacenter sites in King County →

Incentive detail: Sales tax exemption on DC equipment and construction for eligible facilities; no state income tax.

Full DC Readiness breakdown

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

Power availability20%
59
Speed to power15%
33
Fiber connectivity12%
45
Energy cost10%
97
Water risk8%
74
Natural hazard8%
72
Buildability7%
50
Labor market4%
50
DC cluster4%
70
Land / acreage3%
48
Construction cost3%
47
Gas pipeline2%
59
Tax incentive2%
100
Climate / cooling2%
100

Nearby comparable sites

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

Sites near Greenfield (ROCKY REACH - MAPLE VALLEY)
SiteTypeVoltageCapacityQueue waitScore
MAPLE VALLEYSubstation-Adjacent500 kV1,000 MW1.7 yrs76.0
BERRYDALESubstation-Adjacent230 kV300 MW1.7 yrs73.1
ECHO LAKESubstation-Adjacent500 kV1,000 MW1.7 yrs72.8
INVALIDSubstation-Adjacent500 kV1,000 MW1.7 yrs72.7
TAP206230Substation-Adjacent500 kV1,000 MW1.7 yrs72.4
KLAHANIESubstation-Adjacent230 kV300 MW1.7 yrs72.0
COVINGTONSubstation-Adjacent500 kV1,000 MW1.7 yrs71.8
NOVELTY HILLSubstation-Adjacent230 kV300 MW1.7 yrs70.0

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.

Go deeper than the public screen

This page shows a public slice of the GridCensus dataset for Greenfield (ROCKY REACH - MAPLE VALLEY), King County. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.

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