Wilmarth — renewablesinfo.org

Wilmarth — Plant Summary

EIA Plant ID: 1934
Capacity: 25 MW
Primary Fuel: MSW
Technology: Municipal Solid Waste
Status: Operating
Location: Blue Earth, MN
Operating Since: 1948
Generators: 2
Operator: Northern States Power Co - Minnesota
Parent Company: Xcel Energy
Annual Generation: 98,230 MWh
Capacity Factor: 44.9%
Balancing Authority: Midcontinent Independent Transmission System Operator, Inc..
ISO/RTO: MISO
NERC Region: MRO

Search ExploreWilmarth

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Wilmarth

OperatingMuni. Waste

Ranked #2 of 4 Muni. Waste plants in MN#35 of 56 nationally

25 MW Muni. Waste operating in Blue Earth, MN — Midcontinent Independent Transmission System Operator, Inc..

EIAGEMWD

25 MW

Nameplate Capacity

Generators

units

Municipal Solid Waste

Technology

1948

Operating Since

Location

Coordinates

44.1967, -94.0009

County

Blue Earth, MN

Nearby Plants

Mankato Energy Center
Natural Gas740.8 MW · 0.3 km
Archer Daniels Midland Mankato
Natural Gas6.1 MW · 1.3 km
Primrose Solar, LLC
Solar1 MW · 2.0 km

Ownership & Operator

Field	EIA	GEM	Wikidata
Operator	Northern States Power Co - Minnesota	Northern States Power Co	—
Owner(s)	Northern States Power Co - Minnesota	Xcel Energy	—
Status	Operating	operating	—

Ownership Chain

About

The Wilmarth plant, located in Blue Earth County, Minnesota, is a 25 MW waste-to-energy facility. It began operating in 1948 and is owned and operated by Northern States Power Co - Minnesota, a subsidiary of Xcel Energy. The plant utilizes municipal solid waste (MSW) as its primary fuel source across its two generators. Wilmarth operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority and the MRO NERC region.

In the most recent year of data, Wilmarth generated 98,230 MWh of electricity, achieving a capacity factor of 44.9%. The plant's installed cost was $2,198.12 per kW, according to FERC data. Wilmarth is ranked as the second-largest of four MSW plants in Minnesota, and 35th out of 56 nationally.

Generated from EIA, GEM, and public data sources

EIA Plant Profile Wikidata Global Energy Monitor

Engineering & Generators

Grid Context

NERC Region

MRO

Balancing Authority

Midcontinent Independent Transmission System Operator, Inc..

Grid Voltage

69 kV

Regulatory Status

Entity Type

Investor-Owned Utility

Sector

Electric Utility

Generation

8.8K MWh

Latest Month

98.2K MWh

Annual Generation

44.9%

Capacity Factor

Jan 2023 – Dec 2025

Financial DataBeta

Source: FERC Form 1HIGH

$3,446/kW

Installed Cost

$106.1/MWh

Operating Cost

Northern States Power Company (Minnesota)

Reporting Utility

Annual Capital & Operating Expenses

Cumulative Installed Cost

Per-Unit Cost Trends

Pricing & Market Data

HIGH confidence

Point of Interconnection

Nearest Substation

Summit Avenue Substation · 115 kV

Substation Distance

< 10 km

Operator

Xcel Energy

Coord Source

OSM spatial

Market Position

ISO/RTO Market

MISO

LMP Node

NSP WILMART WILMAR_1_UNIT

Pricing Hub

MINN.HUB

Node Source

EIA-860 direct report

News & Articles (9)Beta

Regulatory·ferc order

FERC Approves Dairyland Incentives for Minn.-Wis. Transmission Line

FERC approved Dairyland Power Cooperative's transmission rate incentives request for its Wilmarth-North Rochester-Tremval project...

FERC (regulator)Dairyland Power Cooperative (operator)

RTO Insider·2 years ago

Industry

Ask Us: Local garbage gets burned here, along with metro trash

Q: I know we burn Twin Cities garbage for Mankato energy. Why don't we burn our own garbage collected from Mankato/North Mankato for energy?

Mankato Free Press·3 years ago

Industry

LJP Waste to expand capacity, make fuel for Wilmarth

LJP Waste is seeking to expand the amount of industrial waste it collects and start making refuse-derived fuel for the Wilmarth power plant in Mankato.

LJP Waste (other)Wilmarth (other)

Mankato Free Press·5 years ago

Deals·m and a

Wilmarth Generating Station Archives

Xcel Energy said it will buy a natural gas-fired power plant in Minnesota from Southern Power, a subsidiary of Southern Co. The $650 million deal for the...

Xcel Energy (buyer)Southern Power (seller)

POWER Magazine·7 years ago

Last updated 2026-03-14

View all 9 articles

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EIA Wikidata GEM