FieldProspects

Pierce County, Washington

Pierce County, Washington has 20 power projects in the FieldProspects database: 19 operating plants totaling 641.1 MW and 1 planned project totaling 200 MW. No data center record lists the county. Natural Gas leads with 496.1 MW across 4 projects.

Data as of Grid region: Puget Sound EnergyRefreshed monthly
20
power projects, planned and operating
200MW
planned generation, 1 project
641.1MW
operating generation, 19 projects
0
planned projects past their listed in-service date
Map

Pierce County and its neighbors

Counties shaded by data center MW on record, planned to operating. 5 of its 6 neighboring counties have pages of their own. The rest are in the member database.

Pierce no data centers King 45.6 MW Lewis no data centers Mason no data centers Thurston no data centers Yakima 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
31%

of the county's operating generation is in the queue as new capacity: 200 MW planned across 1 project against 641.1 MW operating.

Operating generation641.1 MW
Planned generation200 MW

Technology mix

20 projects, 841.1 MW planned and operating

Natural Gas496.1 MW4 projects, 59%
Battery Storage200 MW1 project, 24%
Hydro137.8 MW11 projects, 16%
2 other technologies7.2 MW4 projects, 1%
Which companies own these 20 projects?Project names, developers and contacts are for members.See what members get

Power generation in the county

19 plants operate inside Pierce County, 641.1 MW. The queue adds 200 MW across 1 project.

Figure 1

Operating and planned generation by technology

MW in Pierce County

OperatingPlanned
Natural GasOperating 496.1 MW 4 projects
Battery StoragePlanned 200 MW 1 project
HydroOperating 137.8 MW 11 projects
Landfill GasOperating 4.5 MW 3 projects
OilOperating 2.7 MW 1 project
View as table
TechnologyStatusProjectsMW
Natural GasOperating4496.1
Battery StoragePlanned1200
HydroOperating11137.8
Landfill GasOperating34.5
OilOperating12.7
Operating: 641.1 MW. Planned: 200 MW. If every planned project is built, county generation would reach 841.1 MW.
Source. FieldProspects database: ISO/RTO interconnection queues, EIA-860M and public data center filings, data as of October 8, 2026.
Figure 2

Planned generation by listed in-service year

MW. Years before 2026 are past due.

Past dueDue 2026 or later
050100150200 Snapshot year 200 2026
View as table
YearPlanned projectsMW
20261200
No planned project is past its listed year

Pierce County against its neighbors

King County has the most data center MW among the neighbors, 45.6 MW. 5 of the 5 have more generation operating than data center MW on record.

CountyData center recordsData center MWOperating generation MWPlanned generation MWData center MW per MW operating
King County 7
46
167
0 0.27x
Lewis County 0
0
1,883
0 0x
Pierce County this page 0
0
641
200 0x
Yakima County 0
0
194
80 0x
Thurston County 0
0
149
200 0x
Mason County 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.

6 counties shown

Every record in Pierce County

Project name, developer, status, MW, in-service year and the developer’s contacts, for all 20 records. Filter, sort and export to Excel.

Members only
County: Pierce County, WAStatus: all except cancelledSort: MW, largest first 20 records
Project or campusDeveloperStatusMWYearContacts
20 records and 841.1 MW behind this preview

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