Query
South Fork Tolt
Type
Entity Briefing
Entity
South Fork Tolt
ISO/RTO
spp
Generated
2026-10-18T01:40:18.849Z

Briefing on South Fork Tolt

Entity Briefing
Generated Oct 18, 2026·Dataset freshness not reported
17 MW
Capacity
Operating
Current status
1995
Operating since
1
Generators
30.2%
Capacity factor
45 GWh
Annual generation
Briefing/plantOperating

South Fork Tolt is a 17 MW Conventional Hydroelectric asset in Washington, currently Operating.

South Fork Tolt is reported in Washington since 1995 under City of Seattle - (WA). Available operating and financial measures include 30.2% capacity factor and 45 GWh annual generation; $2294/kW reported CapEx.

Location
King, Washington
Technology
Conventional Hydroelectric
Owner / parent
City of Seattle - (WA)
Operator
City of Seattle - (WA)
Grid
Seattle City Light
Plant ID
622

What stands out

1

South Fork Tolt is a 17 MW Conventional Hydroelectric asset in Washington with status Operating.

2

Latest annual operating measures report 30.2% capacity factor and 45 GWh annual generation.

3

Available financial measures include $2294/kW CapEx.

4

Latest linked story: “Relicensing the South Fork Tolt Hydroelectric Project” (Seattle.gov, 2023-10-04).

Market and operating context

Balancing authority
Seattle City Light
NERC region
WECC
State rank
#43 of 73
National rank
#520 of 1,462

Why it matters

For this asset, operating status, generation, ownership, and linked events are the primary facts for performance and asset-level diligence. The exact chart and source-linked records below let the reader test those facts before moving to a deeper report.