Exelon Medway LLC

OperatingDistillate Oil

Ranked #2 of 13 Distillate Oil plants in MA#25 of 823 nationally

135 MW Distillate Oil operating in Norfolk, MA — ISO New England Inc.

EIAWD

135 MW

Nameplate Capacity

Generators

units

Petroleum Liquids

Technology

1970

Operating Since

Location

Coordinates

42.1398, -71.4461

County

Norfolk, MA

Nearby Plants

Exelon West Medway II LLC
Natural Gas263.6 MW · 0.3 km
ANP Bellingham Energy Project
Natural Gas578 MW · 3.3 km
Bourne (MA) - Holliston I
Solar2.3 MW · 3.8 km

Status

as of 8y 6m ago

Latest milestonecivil and underground utilities contractor selectedBoston Real Estate Times · 2017-11-09

Expected COD2018Boston Real Estate Times · 2017-11-09

Ownership & Operator

Field	EIA	GEM	Wikidata
Operator	Constellation Power, Inc	Constellation Power	—
Owner(s)	Constellation Power, Inc	Constellation Energy	—
Status	Operating	—	—

Ownership Chain

DeveloperExelonBoston Real Estate Times · 2017-11-09

ApplicantPower Plus of Texas; Medway GridFranklin Observer · 2023-05-11

About

Exelon Medway LLC is a 135 MW petroleum liquid-fueled power plant located in Norfolk County, Massachusetts. The plant began operating in 1970 and consists of three generators utilizing petroleum liquid technology. It is owned by Constellation Energy and operated by Constellation Power, Inc. The plant operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region.

In the most recent year of reported data, Exelon Medway LLC generated 1,985 MWh of electricity, resulting in a capacity factor of 0.2%. The plant's relatively low output contributes to its ranking as the second-largest of two petroleum liquid plants in Massachusetts, and 48th out of 60 similar plants nationally.

Generated from EIA, GEM, and public data sources

EIA Plant Profile Wikidata

Engineering & Generators

EPC contractorGemma Power Systems, LLCBoston Real Estate Times · 2017-11-09

Grid Context

ISO/RTO

ISO-NE

Market

ISO/RTO Member

NERC Region

NPCC — Northeast Power Coordinating Council

Balancing Authority

Regulatory

AgencyMassachusetts Energy Facility Siting BoardFranklin Observer · 2023-05-11

Latest rulingDenialFranklin Observer · 2023-05-11

ApplicantPower Plus of Texas; Medway GridFranklin Observer · 2023-05-11

Generation

764 MWh

Latest Month

2.0K MWh

Annual Generation

0.2%

Capacity Factor

Jan 2022 – Dec 2024

EmissionsEPA eGRID 2023 rev2

CO₂ Intensity

5295 lb/MWh

Low-utilization plant — per-MWh rate is dominated by startup/standby emissions; not directly comparable to baseload averages.

NOx

16 lb/MWh

SO₂

Financial Data

EIA Avg CostEIA Construction Cost AveragesLOW

2013

Construction CostOperating CostPricing & Revenue

$765/kW

Est. Construction Cost

Total estimated cost: $103.2M

Technology Average·Based on EIA averages — not plant-specific financial reports

Pricing & Market Data

HIGH confidence

Point of Interconnection

Nearest Substation

Medway Substation No. 446 · 345 kV

Substation Distance

< 10 km

Operator

Eversource

Coord Source

OSM spatial

Market Position

ISO/RTO Market

ISO-NE

LMP Node

UN.W_MEDWAY13.8WMJ1

Pricing Hub

.H.INTERNAL_HUB

Location Type

NETWORK NODE

Node Source

EIA-860 direct report

News & Articles (2)Beta

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EIA Wikidata

Exelon Medway LLC — Plant Summary

Exelon Medway LLC

Ownership Chain