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Datacenter Sites in Lewis County, Washington

Lewis County has 47 scored datacenter candidate sites averaging 53.3/100 DC Readiness, with a catalogued aggregate of 2,400 MW. FEMA rates local natural-hazard risk as "Relatively Moderate". The county has a datacenter tax incentive on record.

At a glance

Lewis County, Washington has 47 scored datacenter candidate sites averaging 53.3/100 DC Readiness, roughly in line with the Washington average of 51.7. It ranks 26th of 39 Washington counties by number of sites and 21st by average score. The top-scoring site is EC Near Transalta Centralia Generation · cb9f4f9d at 59.9/100.

47
Candidate sites
53.3/100
Avg DC Readiness
2,400 MW
Catalogued capacity
theoretical aggregate
Relatively Moderate
Hazard rating
◆ Loading map…
≥ 7560–7540–60≤ 40
Top 25 in Lewis County

Site-selection context for Lewis County

Yessales_tax_exemption
Datacenter tax incentive
8.65¢/kWh
Commercial electricity
6.37¢/kWh
Industrial electricity
8
Fiber providers
Low-Medium
Water stress
$9,421
Land price / acre
300
Cooling degree days
5,000
Heating degree days
48°F
Mean annual temp

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

How does Lewis County compare with other counties in Washington?

By number of scored sites, Lewis County ranks 26th of the 39 Washington counties with a county page, holding 0.8% of the state's 6,019 sites. Its average DC Readiness of 53.3/100 ranks 21st in the state and is roughly in line with the national average of 53.0. Nationally it has the 809th-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 20 score 55 or higher.

What types of datacenter sites are in Lewis County?

Substation-Adjacent sites are the most common (16, 34% of the county's inventory), followed by former mine (14) and greenfield (14). Site type reflects how the parcel was identified — next to a substation, on a former mine or brownfield, on industrial or federal excess land — and is scored on the same 14 factors either way.

What are power cost, hazard, water and fiber conditions in Lewis County?

Industrial electricity averages 6.37¢/kWh and commercial 8.65¢/kWh. FEMA's National Risk Index rates the county "Relatively Moderate" (28). WRI water stress is low-medium. 8 fiber providers report service in the county. The climate runs 300 cooling degree days a year with a mean temperature of 48°F. Land is valued around $9,421 an acre.

By site type

Top datacenter sites in Lewis County

Top datacenter sites in Lewis County
SiteTypeVoltageCapacityQueue waitScore
EC Near Transalta Centralia GenerationGreenfield——3.5 yrs59.9
EC Near Transalta Centralia GenerationGreenfield——3.5 yrs59.6
MOSSYROCK PPSubstation-Adjacent240 kV300 MW3.5 yrs59.3
MAYFIELDSubstation-Adjacent240 kV300 MW3.5 yrs59.0
SILVER CREEKSubstation-Adjacent230 kV300 MW3.5 yrs58.8
EC Coal Lewis CountyGreenfield——3.5 yrs58.5
COWLITZ FALLSSubstation-Adjacent230 kV300 MW3.5 yrs58.1
EC Coal Lewis CountyGreenfield——3.5 yrs57.3
EC Near Transalta Centralia GenerationGreenfield——3.5 yrs57.2
EC Coal Lewis CountyGreenfield——3.5 yrs56.8
EC Near Transalta Centralia GenerationGreenfield——3.5 yrs56.7
EC Near Transalta Centralia GenerationGreenfield——3.5 yrs56.6
EC Near Transalta Centralia GenerationGreenfield——3.5 yrs56.0
UNKNOWN201446Substation-Adjacent115 kV100 MW3.5 yrs55.9
ELBESubstation-Adjacent115 kV100 MW3.5 yrs55.8
EC Near Transalta Centralia GenerationGreenfield——3.5 yrs55.7
EC Near Transalta Centralia GenerationGreenfield——3.5 yrs55.6
UNKNOWN207500Substation-Adjacent115 kV100 MW3.5 yrs55.4
UNKNOWN207503Substation-Adjacent115 kV100 MW3.5 yrs55.2
TAP209303Substation-Adjacent115 kV100 MW3.5 yrs55.2
EC Near Transalta Centralia GenerationGreenfield——3.5 yrs54.6
UNKNOWN206277Substation-Adjacent115 kV100 MW3.5 yrs54.6
LEONARD ROADSubstation-Adjacent115 kV100 MW3.5 yrs54.6
MOSSYROCKSubstation-Adjacent115 kV100 MW3.5 yrs54.5
UNKNOWN202232Substation-Adjacent115 kV100 MW3.5 yrs54.1

Every scored site in Lewis County

All 47 sites, best first.

Lewis County datacenter FAQ

How many datacenter sites are in Lewis County?

47 scored datacenter candidate sites, averaging 53.3/100 DC Readiness. That is the 26th-most of 39 Washington counties with five or more sites.

What is the highest-scoring datacenter site in Lewis County?

EC Near Transalta Centralia Generation · cb9f4f9d scores 59.9/100 DC Readiness, the highest of the 47 scored sites in Lewis County (a greenfield site).

Does Lewis County offer datacenter tax incentives?

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

What is the natural-hazard risk in Lewis County?

FEMA's National Risk Index rates Lewis County as "Relatively Moderate" (score 28).

What are industrial electricity rates in Lewis County?

Average industrial electricity is 6.37¢/kWh and commercial is 8.65¢/kWh in Lewis County.

More in Washington

About this data

Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.

Cite as: GridCensus, “Datacenter candidate sites in Lewis County, Washington”, https://gridcensus.com/datacenter-sites/washington/lewis-county (data as of November 12, 2026).

Dataset updated . Screening estimates derived from public data sources.

Go deeper than the public screen

Every site and score for Lewis County, Washington 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.

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