Transmission Availability

Transmission Services provides information to assist customers as they reserve and schedule transmission.

System Information

POR/POD Combinations for 1:1 ATC Paths
Proposed Outages
Reservation to E-Tag Point Relationships
Transmission System Constraints (updated 01/16/2025)

Long-Term Transmission Inventory Map

Long-Term Redirect Inventory Map (08/25/2025)
Long-Term Original Inventory Map (08/25/2025)
Long-Term Transmission Inventory Map Instructions

Long-Term Available Transfer Capability

Long-Term Firm ATC Inventory
Ineligible Source Points of Receipt for Conditional Firm Service
Contract Points List (updated 02/03/2026)
Long-Term Pending Queue
TSR Workflow Process Map
Long-Term PTDF Table (updated 03/20/2025)

Short-Term Available Transfer Capability

The Short-Term PTDF Table has "All Lines in Service" values and may not reflect the same results as BPA's OASIS, which considers transmission outages.

Short-Term PTDF Table (updated 02/11/2026)
ST ATC/AFC Analysis User Guide (12/22/2025)

Outage & Interruption Information:

Hourly TTC Path Limit
Outage Summary
JOTS Automated Capacity Change Notification