Mayfield

418 Gershick Road, Silver Creek, WA 98585

Plant Summary Information

Mayfield is ranked #31 out of 131 power plants in Washington in terms of total annual net electricity generation.

Mayfield is comprised of 4 generators and generated 125.8 GWh during the 3-month period between September 2024 to December 2024.

Plant Name	Mayfield
Utility Name	City of Tacoma - (WA)
Location	Lewis County, WA
Initial Operation Date	March 1963
Last Update	Dec 2024
Annual Generation	576.4 GWh
Annual Consumption	2.3 M MMBtu
Ranked #1,168 out of 12,299 Power Plants Nationwide
Ranked #66 out of 1,323 Water Power Plants Nationwide
Ranked #31 out of 131 Washington Power Plants
Ranked #15 out of 68 Washington Water Power Plants
Fuel Types	Water
Previous Operator	City of Tacoma - (WA) (2013 to 2015) City of Tacoma - (WA) (2016 to 2024)

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Summary Information
Plant Name	Mayfield (3917)
Plant Address	418 Gershick Road, Silver Creek, WA 98585
Utility	City of Tacoma - (WA) (18429)
Latitude, Longitude	46.5035, -122.5885
Generation Dates on File	Jan 2001 to Dec 2024
Initial Operation Date	March 1963
Annual Generation	576.4 GWh
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	City of Tacoma, Department of Public Utilities, Light Division (TPWR)
NAICS Code	Utilities (22)
Sector	Electric Utility (1)
Water Source	Cowlitz River
Ash Impoundment	No
Transmission / Distribution Owner	City of Tacoma - (WA) (18429) WA
Grid Voltage	240.00 kV
Energy Storage	No

* Data obtained from the 2024 EIA 860 Report

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
Nameplate Capacity	40.5 MW
Nameplate Power Factor	1
Summer Capacity	41 MW
Winter Capacity	41 MW
Minimum Load	8 MW

Uprate/Derate Completed	No
Status	Operating
First Operation Date	March 1963
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Time From Cold Shutdown To Full Load	1H

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
Nameplate Capacity	40.5 MW
Nameplate Power Factor	1
Summer Capacity	41 MW
Winter Capacity	41 MW
Minimum Load	8 MW

Uprate/Derate Completed	No
Status	Operating
First Operation Date	April 1963
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Time From Cold Shutdown To Full Load	1H

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
Nameplate Capacity	40.5 MW
Nameplate Power Factor	1
Summer Capacity	41 MW
Winter Capacity	41 MW
Minimum Load	8 MW

Uprate/Derate Completed	No
Status	Operating
First Operation Date	June 1963
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Time From Cold Shutdown To Full Load	1H

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
Nameplate Capacity	40.5 MW
Nameplate Power Factor	1
Summer Capacity	41 MW
Winter Capacity	41 MW
Minimum Load	8 MW

Uprate/Derate Completed	No
Status	Operating
First Operation Date	May 1983
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Water
Time From Cold Shutdown To Full Load	1H

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
#56	Hungry Horse	Columbia Falls, MT	730.3 GWh
#57	Wolf Creek	Jamestown, KY	723.8 GWh
#58	Gavins Point	Crofton, NE	712.6 GWh
#59	Gorge	Rockport, WA	700.0 GWh
#60	Chickamauga	Chattanooga, TN	688.9 GWh
#61	J Strom Thurmond	Clarks Hill, SC	650.7 GWh
#62	Bull Shoals	Mountain Home, AR	647.3 GWh
#63	Rock Creek	Storrie, CA	604.5 GWh
#64	Big Creek 3	Auberry, CA	593.2 GWh
#65	Barkley	Kuttawa, KY	590.6 GWh
#67	Great Lakes Hydro America - ME	Millinocket, ME	570.9 GWh
#68	Swift 1	Cougar, WA	553.9 GWh
#69	Trinity	Weaverville, CA	552.7 GWh
#70	Calderwood	Tallassee, TN	549.2 GWh
#71	Folsom	Folsom, CA	546.4 GWh
#72	Pit 5	Big Bend, CA	527.8 GWh
#73	Dardanelle	Dardanelle, AR	517.3 GWh
#74	Fairfield Pumped Storage	Jenkinsville, SC	497.5 GWh
#75	Osage Dam	Eldon, MO	497.1 GWh
#76	Dion R Holm	Groveland, CA	492.3 GWh

Below are closest 20 power plants surrounding Mayfield.

Plant Name	Plant Location	Annual Generation	Distance
Alder	La Grande, WA	182.9 GWh	24.5 mi
Beaver	Clatskanie, OR	1.7 TWh	36.1 mi
Chehalis Generating Facility	Chehalis, WA	2.5 TWh	17.5 mi
Cowlitz Falls	Randle, WA	196.3 GWh	22.9 mi
Frederickson	Tacoma, WA	87.8 GWh	41.2 mi
LaGrande	La Grande, WA	297.3 GWh	26.1 mi
Longview Fibre	Longview, WA	170.9 GWh	31.8 mi
LRI LFGTE Facility	Graham, WA	32.1 GWh	35.5 mi
Merwin	Ariel, WA	467.3 GWh	37.8 mi
Mint Farm Generating Station	Longview, WA	2.0 TWh	31.5 mi
Mossyrock	Silver Creek, WA	824.4 GWh	8.1 mi
Nippon Dynawave Packaging Longview WA	Longview, WA	285.2 GWh	32 mi
Port Westward	Clatskanie, OR	3.0 TWh	35.7 mi
Port Westward Unit 2	Clatskanie, OR	1.1 TWh	35.7 mi
Skookumchuck	Tenino, WA	3.2 GWh	20.4 mi
Skookumchuck Wind Facility	Rainier, WA	400.6 GWh	24.3 mi
Swift 1	Cougar, WA	553.9 GWh	35.7 mi
Transalta Centralia Generation	Centralia, WA	3.1 TWh	21.7 mi
Yale	Amboy, WA	488.4 GWh	39.3 mi
Yelm	Yelm, WA	33.7 GWh	32.6 mi