Shallow Seam BESS
400 MW storage in Clearfield, PA · In queue since September 2024 · Proposed COD December 2026
400 MW
Capacity
1
Components
Battery
1y 8m
In Queue
—
IA Status
COD target: 2026
Total Duration
2y 3m
Interconnection request submitted to ISO/RTO
NYISO transitioned to a Transitional Cluster Study (TCS) format in 2024.
Typical: >42 months (historical); ~24 months target
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2026-12-01
The Shallow Seam BESS project is a proposed 400 MW battery storage project located in Clearfield County, Pennsylvania. Developed by Shallow Seam Energy Storage, LLC, the project is interconnected within the New York Independent System Operator (NYISO) queue as entry NYISO-C24-233. The proposed commercial operation date is December 1, 2026, with a queue entry date of September 22, 2024.
The project is slated to connect to the Homer City - Mainesburg 345kV Line (L47) and is currently listed as active in the interconnection queue.
Generated from interconnection queue and public data sources
State
PA
County
Clearfield
Grid Region
NYISO (New York)
Market
ISO/RTO Member
Developer
Shallow Seam Energy Storage, LLC
Utility
NYSEG
Entity
NYISO
Service Type
—
Point of Interconnection
Homer City - Mainesburg 345kV Line (L47)
Data Source
LBNL + Live
- ISO / RTO
- NYISO
- Trading Hub
- ZONE F
- Hub Confidence
- MEDIUM
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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