FieldProspects

Mason County, Washington

Mason County, Washington has 14 power projects in the FieldProspects database, all of them operating, 136.4 MW in total, with nothing in the queue. No data center record lists the county. Hydro leads with 136.4 MW across 14 projects. Data as of October 8, 2026.

Data as of Grid region: Bonneville Power AdministrationRefreshed monthly
14
power projects, planned and operating
0MW
planned generation, 0 projects
136.4MW
operating generation, 14 hydro projects
0
planned projects past their listed in-service date
Map

Mason County and its neighbors

Counties shaded by data center MW on record, planned to operating. 3 of its 5 neighboring counties have pages of their own. The rest are in the member database.

Pierce no data centers Grays Harbor no data centers Jefferson Mason no data centers Thurston no data centers Kitsap
no data center MWunder 100 MW100 to 1,000 MW1,000 to 5,000 MW5,000 to 15,000 MW15,000 MW or more no page yet

Data center records planned, under construction and operating, data as of October 8, 2026.Hover a county for its numbers

Headline finding
136.4MW

of operating generation across 14 plants, and nothing in the interconnection queue for Mason County.

Operating generation136.4 MW
Planned generation0 MW

Technology mix

14 projects, 136.4 MW planned and operating

Hydro136.4 MW14 projects, 100%
Which companies own these 14 projects?Project names, developers and contacts are for members.See what members get

Power generation in the county

14 plants operate inside Mason County, 136.4 MW of hydro. Nothing is in the queue for the county.

Figure 1

Operating and planned generation by technology

MW in Mason County

OperatingPlanned
HydroOperating 136.4 MW 14 projects
View as table
TechnologyStatusProjectsMW
HydroOperating14136.4
Operating: 136.4 MW. Planned: 0 MW. Nothing is in the queue to add to it.
Source. FieldProspects database: ISO/RTO interconnection queues, EIA-860M and public data center filings, data as of October 8, 2026.

Mason County against its neighbors

None of the 3 neighboring counties with a page lists a data center record. Grays Harbor County has the most operating generation among them, 766.7 MW.

CountyData center recordsData center MWOperating generation MWPlanned generation MWData center MW per MW operating
Grays Harbor County 0
0
767
0 0x
Pierce County 0
0
641
200 0x
Thurston County 0
0
149
200 0x
Mason County this page 0
0
136
0 0x

Data center MW counts records planned, under construction and operating. Generation is inside the county only. Neighbors without a page have fewer than three projects on record.

4 counties shown

Every record in Mason County

Project name, developer, status, MW, in-service year and the developer’s contacts, for all 14 records. Filter, sort and export to Excel.

Members only
County: Mason County, WAStatus: all except cancelledSort: MW, largest first 14 records
Project or campusDeveloperStatusMWYearContacts
14 records and 136.4 MW behind this preview

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