Herbert A Wagner
Anne Arundel County
Overview
- Reported capacity
- 773.7 MW
- EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
- Technology
- Petroleum Liquids
- Primary generation technology.
- Registry anchor
- Plant 1554
- Anne Arundel County · PJM
- Operating status
- Operating
- Herbert A Wagner is currently operating; a closure or retirement is listed for May 31, 2029.
- Grid connection
- Wagner Substation
- Baltimore Gas and Electric Company (BGE)
- Commercial operation
- 1956
- Best-supported operating milestone.
Infrastructure record
- Operator
- H.A. Wagner LLC
- Alternate name
- Herbert A. Wagner Generating Station
- Mapped facility footprint
- Mapped infrastructure footprint
Mapped infrastructure geometry associated with this asset.
- In service
- 1956-02
Profile
- Operating status
- Herbert A Wagner is currently operating; a closure or retirement is listed for May 31, 2029.
- Grid role
- Reliability-must-run resource supporting local transmission reliability in and around Baltimore and the BGE zone until transmission upgrades are complete.
- Grid connection
- Wagner Substation · Baltimore Gas and Electric Company (BGE).
- Physical build
- The exact Herbert A Wagner asset comprises two steam-electric generating units, Units 3 and 4. Each unit has one explicitly identified Babcock & Wilcox boiler: Unit 3 is a once-through supercritical coal-fired steam boiler rated at 2,740 MMBtu/hr, and Unit 4 is a dry-bottom wall-fired No. 6 fuel-oil steam boiler rated at 4,200 MMBtu/hr. Unit 3 is approximately 305 MW summer capacity and Unit 4 approximately 397 MW summer capacity. Unit 3 is also reported with a Westinghouse double-reheat cross-compound turbine.
Structured profile
- Reported capacity
- 773.7 MW
Petroleum Liquids
- Commercial operation
- 1956
- Operating status
- operating
Herbert A Wagner is currently operating; a closure or retirement is listed for May 31, 2029.
- Retirement
- May 31, 2029
Herbert A Wagner is currently operating; a closure or retirement is listed for May 31, 2029.
- Interconnection
Generation and physical site
EIA plant 1554 · Inventory for Sep 2026.
Reported operating nameplate by technology
- Petroleum
- 773.7 MW
Generator records (5)
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| 3 | Petroleum Liquids | Operating | 359 | Unknown |
| 4 | Petroleum Liquids | Operating | 414.7 | Unknown |
| 1 | Petroleum Liquids | Retired | 132.8 | Unknown |
| GT1 | Petroleum Liquids | Retired | 16 | Unknown |
| 2 | Conventional Steam Coal | Retired |
Related assets
Similar plants ranked by technology, capacity, and distance.
Units and generators
Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 3 | 359 MW 305 MW summer | Petroleum Liquids ST | Aug 1966 Retirement: Jun 2029 | Operating |
| 4 | 414.7 MW 397 MW summer | Petroleum Liquids ST | Aug 1972 Retirement: Jun 2029 | Operating |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 773.7 MW
- Petroleum Liquids
- National rank
- #6
- of 726 operating peers
- MD rank
- #1
- of 12 operating peers
Monthly generation
Download CSVLatest 12 months
392.3 GWh
Reported net generation
Latest report
Jul 2026
EIA-923 monthly filing
2025 capacity factor
2.8%
Using current reported nameplate capacity
Grid and market context
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Commercial, land, and environmental record
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Land and environmental record
Actual Cooling-Water Withdrawal
2022
124 MGD in 2021 and 95 MGD in 2022 from Patapsco River
Maryland DNR table reports average actual withdrawals of 124 MGD (2021) and 95 MGD (2022) from Patapsco River.
Air Operating Permit
2022
Maryland Part 70 Operating Permit No. 24-003-0468
Fort Smallwood Complex operates under combined Title V/Part 70 permit covering Brandon Shores and H. A. Wagner generating stations; emissions from both aggregated for permitting.
Air-Emissions Facility Identifier
2024
MDE Registration No. 6-1144
Maryland Part 70 fact sheet assigns MDE Registration No. 6-1144 to Wagner's material-handling operations for coal, ash, hydrated lime, powdered activated carbon, and related materials.
Cooling-Water Appropriation
2022
Patapsco River once-through cooling; average surface-water appropriation 600 million gallons/day
Maryland DNR 2024 power-plant water-use report lists H. A. Wagner under once-through cooling with Patapsco River as water source and 600 MGD average appropriation.
Cooling-Water Consumption
2022
Estimated water consumption 0.63 MGD
Maryland DNR table estimates H. A. Wagner's consumption at 0.63 MGD while identifying Patapsco River as water source.
Emissions Controls
2022
Unit 1 ESP; Unit 2 SNCR plus ESP; Unit 3 SCR, dry sorbent injection, PAC injection, and ESP; Unit 4 multiple cyclone
Maryland Part 70 renewal identifies principal emission controls for Wagner Units 1–4. Unit 3 includes SCR, dry sorbent injection, PAC injection, and electrostatic precipitator.
Environmental Operating Restriction And Emergency Order
Oct 26, 2025
Wagner Unit 4: 438-hour annual fuel-oil operating limit; DOE emergency relief expired January 1, 2026
DOE identified 438-hour-per-calendar-year limit for Unit 4 burning fuel oil. Renewed emergency order authorized operation above limit only through January 1, 2026, subject to PJM dispatch and emissions compliance.
Federally Enforceable Emissions Limit
Jan 1, 2021
SO2 limit of 3,860 lb/hour on a 30-day rolling average for Brandon Shores Units 1 and 2 and Wagner Unit 3 when simultaneously operating
Maryland consent order establishes federally enforceable Fort Smallwood SO2 limit beginning January 1, 2021. Order also references 2,851 lb/hour rolling three-hour limit for applicable units.
Related parties and identifiers
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Relationship graph
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AssetOwner / operatorOrganizationMarket / regulatorRelated asset
Timeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Unit 1 construction and commercial operationPJM request...
Historical records identify Wagner Unit 1 as a coal-fired unit built in 1956.