Show on map
Westport — Power plant · Gas, combustion turbine · Constellation Power Source Generation, LLCMarley Neck 3 - SLBAL005 — Under construction · Solar · MD · 2 MW · 6.5 mi awayMarley Neck 4 - SLBAL006 — Under construction · Solar · MD · 1.4 MW · 6.5 mi awayCONTROL DATA CORP. — Built · Large load · MD · 6.9 mi awayAMAZON DATA SERVICES INC LTW062 — Built · Large load · MD · 8.8 mi awayAMAZON DATA SERVICES INC LTW060 — Built · Large load · MD · 11.3 mi awayProject Shadow S&R Crane 1 (Annapolis Junction MD data centre) — Filed · Large load · MD · 13.5 mi away
  • Combustion
  • Wind & solar
  • Loads
  • In development
  • Under construction
  • Operating
  • Retired
  • Size not stated
  • 10 · 100 · 1,000 MW

Westport

Power plant · Gas, combustion turbine

Key facts

Power plant · Gas, combustion turbineran 4% of 2019 Retired
Capacity
Capacity: sourceEIA-860M · Open licenseMW
Commissioned
1969
Net generation, 2019
46,124 MWh
Grid
115 kV to Baltimore Gas & Electric Co (PJM)
Location
Baltimore City County, Maryland

Output

Net generation MWh by year, 2001 to 2020
Fuel burned MMBtu by year, 2001 to 2020
  • Gas

Operations detail

Details

Who’s behind it

Owner
Exelon

Interested in this project?

Set an alert Book a call Join the beta

Our team gets you what you need.

Beta: private project space · data room · readiness check

Technology
Gas, combustion turbine source: “Natural Gas Fired Combustion Turbine”
Age
57 years since 1969
All 3 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory
AttributeValue
Gem
Parents
Name
Constellation Energy Corp
Share pct
100
Gem entity id
E100001000208
Unit ids
G100000402641
Location id
L100000401828
Eia plant ids
1560
EPA greenhouse gas reporting (GHGRP)
EPA FRS ID
110071160047
NAICS code
221112
Subpart PP (CO2 supply)
No
Subpart RR (geologic sequestration)
No
Subpart UU (CO2 injection)
No
Reporting year
2023
GHGRP facility ID
1000646
Balancing authority codePJM

Retirement

EIA-860M September 2026StatusEvery generator EIA lists at this plant has retired. As of EIA-860M for September 2026.
Retired
June 2020
Capacity retired
121.5 MW
Generators retired
1
GeneratorTechnologyNameplateStateDate
GT5Natural Gas Fired Combustion Turbine121.5 MWRetiredJune 2020

Grid

EIA-860 2025Grid fieldsAs the plant reported them to EIA-860 for 2025 (Schedule 2).
Grid voltage at the plant
115 kV
Transmission or distribution system owner
Baltimore Gas & Electric Co
Balancing authority
PJM Interconnection, LLC
NERC region
RFC
Transmission lines within 15 mi (10)
Can the connection be reused?

A plant that retires usually leaves its substation, transmission connection and interconnection agreement behind, and those may be reusable by a new project at the same site. FERC Order No. 845 lets an interconnection customer use surplus interconnection service at an existing site, and some transmission providers' tariffs let a replacement resource take over a retiring unit's interconnection service, usually within a set time after the retirement. Whether any such right still exists here, who holds it and on what terms depends on the owner, the transmission provider and timing; this page does not establish any of that.

Ownership

2 companies2
CompanyRoleShareAs ofSource
Constellation Power Source Generation, LLC Operator EIA-860M
Exelon Owner 100.0% Dec 31, 2023 EPA GHGRP

Timeline

  • Stated Unit GT5 scheduled to retire, 121.5 MW · EIA-860M
  • In service · EIA-860M

Sources

6 sources

Sources EIA-860M · GEM · LBNL · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)

Sources

  • EIA-860MOpen license · retrieved Nov 4, 2026
  • GEMOpen license, with credit · retrieved Oct 26, 2026Global Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
  • LBNLOpen license, with credit · retrieved Nov 13, 2026Yin, Nait Belaid & Heleno (2026), Lawrence Berkeley National Laboratory, OEDI, CC BY 4.0: A Harmonized Geospatial Dataset of U.S. Transmission Lines: Linking FERC Form 1 and HIFLD, 1994-2024. Modified by Inframation: HIFLD-side fields only, names re-cased, coordinates rounded.
  • EIAOpen license · retrieved Nov 1, 2026Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
  • EIA-860M Preliminary Monthly Electric Generator Inventory
  • EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)

Every source and license · Attribution

View at source

Around this plant

Nearby

within 15 mi
ProjectKindAwayMW
Marley Neck 3 - SLBAL005 Under construction Solar 6.5 mi 2
Marley Neck 4 - SLBAL006 Under construction Solar 6.5 mi 1.4
CONTROL DATA CORP. Built Large load 6.9 mi
AMAZON DATA SERVICES INC LTW062 Built Large load 8.8 mi
AMAZON DATA SERVICES INC LTW060 Built Large load 11.3 mi
Project Shadow S&R Crane 1 (Annapolis Junction MD data centre) Filed Large load 13.5 mi

Sources EIA-860M · EPA ICIS-Air · FAA OE/AAA

Sources

Attribution