Mt Airy 230 kV
300 MW storage in Frederick, MD · In queue since April 2026 · Proposed COD December 2030
300 MW
Capacity
0
Components
6 months
In Queue
—
IA Status
COD target: 2030
One connected view of the asset's ownership, operating or development evidence, grid context, commercial relationships, history, and forward outlook.
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Total Duration
4y 8m
Study Phase
C01
Interconnection request submitted to ISO/RTO
PJM processes interconnection requests through multi-phase System Impact Studies (SIS).
Typical: ~48 months (historically longest)
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2030-12-31
Mt Airy 230 kV is a proposed battery energy storage project in Frederick County, Maryland, with a total capacity of 300 MW. The development project is being pursued by Old Main Storage LLC and would connect to the transmission system at the Mt Airy 230 kV point of interconnection, within the service territory of the utility APS (Allegheny Power System). It is a standalone storage facility and does not include any co-located generation components.
The project is listed in the PJM Interconnection queue under queue ID PJM-C01-1929 and holds an active status. It entered the queue on April 27, 2026, requesting Generation Interconnection service, and is being evaluated in PJM's C01 study phase. The proposed commercial operation date is December 31, 2030. The available data does not indicate that an interconnection agreement has been executed.
Generated from interconnection queue and public data sources
Realization risk before commercial operation — cluster-study clearance, IA timing, counterparty mix, and withdrawal probability vs cohort. The diligence view that determines whether this project is worth pursuing. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
MD
County
Frederick
Grid Region
PJM Interconnection
Market
ISO/RTO Member
Developer
Old Main Storage LLC
Utility
APS
Entity
PJM
Service Type
Generation Interconnection
Point of Interconnection
Mt Airy 230 kV
Data Source
live-pjm_cycle
Composite operating-phase risk view — what this asset's risk profile would look like once it reaches commercial operation. Climate hazards across its operating life, expected generation variability, and offtake counterparty exposure, decomposed into a single decision-grade score. Powered by InfraRisk.
See the full risk decomposition + scenarios for this project.
Forward generation outlook — what this project would produce assuming it reaches commercial operation. Probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios, conditioned on the proposed COD. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this project.
Forward revenue, DSCR projection, and financing-close risk — conditioned on commercial operation. The bankability view that determines whether the deal clears its covenants once online. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this project.
- ISO / RTO
- PJM
- Trading Hub
- WESTERN HUB
- Hub Confidence
- HIGH
- Nearest Node (Estimated)
- RENAN 34.5 KV RENANSP
- POI Substation
- Mt Airy Substation
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
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Ask about Mt Airy 230 kVForward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
