System Maintenance

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Markets & Operations

System Information

Exceptions to Three Percent Three Pivotal Supplier Test Threshold XLS

Historical Area Control Error Data

Potential Transmission Switching Options

Critical Energy Infrastructure Information

Emergency Procedures

Real-Time Operational Data - This page includes locational marginal pricing, transfer limits, instantaneous load and transmission constraints

Historical Load Data

Seven-Day Load Projections & Constraint Forecast

Historical 1800 Load Forecast

Long-Term Firm Transmission Service Requests - system impact studies

Day-Ahead Interface Flows & Limits

Generation Outlet Interfaces
CPL-DOM: PDF

Special Protection Scheme (SPS/RAS) Installation/Removal
Homer City RAS Retirement The Homer City RAS is expected to be retired and removed by the end of 2023. The RAS is no longer operational.

Procedural Updates
The following procedure will be included in the upcoming Manual-03 publication: Wescosville Switching Procedure PDF

Thermal Ratings
Ratings Information
Manual 3: Attachment F Short-Term Emergency Line Ratings XLS
PEPCO: Common Trench Cable Ratings XLS

Voltage Limits
PJM RTO & Transmission Owner Voltage Limits CSV

Automatic Sectionalizing Schemes
Manual 3, Attachment E: Automatic Sectionalizing Schemes Pending Approval & Recent Changes PDF Automatic Sectionalizing Schemes PDF

Transmission Facilities Information
Reliability & Markets Tariff Facility Modifications Approved or Denied for 6.1.2025 \| 6.1.2024 \| 6.1.2023 \| 6.1.2022 \| 6.1.2020 \| 6.1.2019 \| 6.1.2018 XLS To be Effective: June 2025 as Proposed by Transmission Owners - 12.19.2024 XLS June 2024 as Proposed by Transmission Owners - 1.8.2024 XLS June 2024 as Proposed by Transmission Owners - 12.1.2023 XLS June 2023 as Proposed by Transmission Owners - 1.5.2023 XLS June 2023 as Proposed by Transmission Owners - 12.1.2022 XLS June 2022 as Proposed by Transmission Owners - 3.2.2022 XLS June 2020 as Proposed by Transmission Owners - 1.31.2020 XLS
List of Designated Network Resources
Transmission Facilities
Complete Descriptions CSV
Outage Information
Regional Transmission Expansion Plan Construction Status

Transmission Outage Cancellation & Rescheduling After Day-Ahead Market Metrics
2025 \| 2024 \| 2023 \| 2022 \| 2021 \| 2019 PDF

EMS Model Builds

Any schedule changes will be sent to DMS Members and posted on the Web Calendar.