Boundary

1198 Boundary Dam Access Road, Metaline, WA 99152

Plant Summary Information

Boundary is ranked #14 out of 1,332 hydroelectric power plants nationwide in terms of total annual net electricity generation.

Boundary is comprised of 6 generators and generated 541.5 GWh during the 3-month period between May 2025 to August 2025.

Plant Name	Boundary
Utility Name	City of Seattle - (WA)
Location	Pend Oreille County, WA
Initial Operation Date	August 1967
Last Update	Aug 2025
Annual Generation	2.8 TWh
Annual Consumption	9.9 M MMBtu
Ranked #418 out of 12,539 Power Plants Nationwide
Ranked #14 out of 1,332 Water Power Plants Nationwide
Ranked #10 out of 133 Washington Power Plants
Ranked #7 out of 70 Washington Water Power Plants
Fuel Types	Water

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Summary Information
Plant Name	Boundary (6433)
Plant Address	1198 Boundary Dam Access Road, Metaline, WA 99152
Utility	City of Seattle - (WA) (16868)
Latitude, Longitude	48.98711, -117.34785
Generation Dates on File	Jan 2001 to Aug 2025
Initial Operation Date	August 1967
Annual Generation	2.8 TWh
Fuel Types	Water

Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration Status	No
FERC Small Power Producer Status	No
FERC Exempt Wholesale Generator Status	No

Regulatory Information
Regulatory Status	Regulated
NERC Region	WECC
Balancing Authority	Seattle City Light (SCL)
NAICS Code	Utilities (22)
Sector	Electric Utility (1)
Water Source	Pend Oreille River
Ash Impoundment	No
Transmission / Distribution Owner	Bonneville Power Administration (1738) WA
Grid Voltage	230.00 kV
Energy Storage	No

* Data obtained from the 2024 EIA 860 Report

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	BNDRYSCL_2_GEN51GNODE
RTO ISO Location Designation For Reporting Wholesale Sales Data	BNDRYSCL_2_GEN51GNODE
Nameplate Capacity	180.5 MW
Nameplate Power Factor	0.95
Summer Capacity	180.5 MW
Winter Capacity	180.5 MW
Minimum Load	20 MW
Uprate/Derate Completed	Yes

Uprate Or Derate Completed	December 2024
Status	Operating
First Operation Date	October 1967
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
Multiple Fuels	No

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	BNDRYSCL_2_GEN52GNODE
RTO ISO Location Designation For Reporting Wholesale Sales Data	BNDRYSCL_2_GEN52GNODE
Nameplate Capacity	161.5 MW
Nameplate Power Factor	0.95
Summer Capacity	161.5 MW
Winter Capacity	161.5 MW
Minimum Load	20 MW
Uprate/Derate Completed	No
Status	Operating
First Operation Date	August 1967

Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
Planned Net Summer Capacity Uprate	19 MW
Planned Net Winter Capacity Uprate	19 MW
Planned Uprate	October 2027
Other Planned Modifications	Yes
Other Modifications	October 2027
Multiple Fuels	No

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	BNDRYSCL_2_GEN54GNODE
RTO ISO Location Designation For Reporting Wholesale Sales Data	BNDRYSCL_2_GEN54GNODE
Nameplate Capacity	180.5 MW
Nameplate Power Factor	0.95
Summer Capacity	180.5 MW
Winter Capacity	180.5 MW
Minimum Load	20 MW

Uprate/Derate Completed	No
Status	Operating
First Operation Date	August 1967
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
Multiple Fuels	No

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	BNDRYSCL_2_GEN53GNODE
RTO ISO Location Designation For Reporting Wholesale Sales Data	BNDRYSCL_2_GEN53GNODE
Nameplate Capacity	158.4 MW
Nameplate Power Factor	0.95
Summer Capacity	158.4 MW
Winter Capacity	158.4 MW
Minimum Load	20 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	September 1967
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
Other Planned Modifications	Yes
Other Modifications	November 2028
Multiple Fuels	No

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	BNDRYSCL_2_GEN55GNODE
RTO ISO Location Designation For Reporting Wholesale Sales Data	BNDRYSCL_2_GEN55GNODE
Nameplate Capacity	239.4 MW
Nameplate Power Factor	0.95
Summer Capacity	232 MW
Winter Capacity	232 MW
Minimum Load	5 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	November 1985
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
Other Planned Modifications	Yes
Other Modifications	September 2029
Multiple Fuels	No

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	BNDRYSCL_2_GEN56GNODE
RTO ISO Location Designation For Reporting Wholesale Sales Data	BNDRYSCL_2_GEN56GNODE
Nameplate Capacity	239.4 MW
Nameplate Power Factor	0.95
Summer Capacity	232 MW
Winter Capacity	232 MW
Minimum Load	5 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	May 1986
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
Other Planned Modifications	Yes
Other Modifications	December 2029
Multiple Fuels	No

Owner Name	Address	Generator	Ownership
*We couldn't locate any owners for this plant*

Power plants with a similar annual net generation from Water.

Rank	Plant Name	Plant Location	Annual Generation
#4	John Day	Rufus, OR	7.2 TWh
#5	Robert Moses Power Dam	Massena, NY	6.8 TWh
#6	The Dalles	The Dalles, OR	5.7 TWh
#7	Rocky Reach	Wenatchee, WA	5.1 TWh
#8	Wanapum	Beverly, WA	4.3 TWh
#9	Priest Rapids	Mattawa, WA	4.0 TWh
#10	McNary	Umatilla, OR	3.7 TWh
#11	Wells	Chelan, WA	3.6 TWh
#12	Bonneville	Cascade Locks, OR	3.6 TWh
#13	Glen Canyon Dam	Page, AZ	2.8 TWh
#15	Wilson Dam	Muscle Shoals, AL	2.6 TWh
#16	Shasta	Redding, CA	2.4 TWh
#17	Brownlee	Cambridge, ID	2.2 TWh
#18	Oahe	Pierre, SD	2.2 TWh
#19	Rock Island	Wenatchee, WA	2.2 TWh
#20	Garrison	Riverside, ND	2.1 TWh
#21	Hoover Dam (NV)	Boulder City, NV	2.0 TWh
#22	Hells Canyon	Oxbow, OR	1.9 TWh
#23	Libby	Libby, MT	1.9 TWh
#24	Edward C Hyatt	Oroville, CA	1.9 TWh

Below are closest 20 power plants surrounding Boundary.

Plant Name	Plant Location	Annual Generation	Distance
Albeni Falls	Oldtown, ID	179.3 GWh	58 mi
Boulder Park	Spokane, WA	99.0 GWh	89.6 mi
Box Canyon	Ione, WA	464.1 GWh	14.6 mi
Cabinet Gorge	Clark Fork, ID	857.6 GWh	86 mi
Kettle Falls Generating Station	Kettle Falls, WA	329.8 GWh	43 mi
Little Falls (WA)	Ford, WA	185.3 GWh	84.6 mi
Long Lake	Ford, WA	456.2 GWh	82.7 mi
Meyers Falls	Kettle Falls, WA	9.2 GWh	42.2 mi
Monroe Street	Spokane, WA	89.9 GWh	92.2 mi
Moyie Springs	Moyie Springs, ID	20.9 GWh	56.1 mi
Nine Mile	Nine Mile, WA	125.7 GWh	84.6 mi
Northeast (WA)	Spokane, WA	1.2 GWh	86.5 mi
Post Falls	Post Falls, ID	69.1 GWh	90.5 mi
Rathdrum	Rathdrum, ID	866.3 GWh	84.6 mi
Rathdrum Power LLC	Rathdrum, ID	1.4 TWh	85.3 mi
Sheep Creek Hydro	Northport, WA	7.8 GWh	20.5 mi
Smith Falls Hydro Project	Bonners Ferry, ID	83.0 GWh	35.9 mi
Spokane Waste to Energy	Spokane, WA	134.4 GWh	94.3 mi
Upper Falls	Spokane, WA	59.9 GWh	92.1 mi
Upriver Dam Hydro Plant	Spokane, WA	48.4 GWh	90.2 mi