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Transmission Availability

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

System Information

Interties and External Interconnections in OASIS

Reservation to E-Tag Point Relationships

Transmission System Constraints (Updated 2/1/22)

Long-Term Transmission Inventory Map

Long-Term Redirect Inventory Map (1/27/22)
Long-Term Original Inventory Map (1/27/22)
Long-Term Transmission Inventory Map Instructions

Long-Term Availability Transfer Capability

ATC and AFC Firm Inventory

Ineligible Source Points of Receipt for Conditional Firm Service

AFC/ATC Less Pending Queued Request Inventory

Contract Points List

Long-Term Pending Queue

Transmission Reservation & Available Transfer Capability (ATC) Analysis Request (What if Scenario)

Short-Term Availability Transfer Capability

The Short-Term Calculators utilize "All Lines in Service" PTDFs and may not reflect the same results as BPA's OASIS, which considers transmission outages.

Short Term Original Transmission Service Request Calculator

Short Term Redirect Transmission Service Request Calculator

Short-Term PTDF Table

Outage & Interruption Information:

Curtailment Priority

Hourly TTC Path Limits
Outage Summary
JOTS Automated Capacity Change Notification

Notice: Nomograms are now available in the BPA Customer Portal. If you do not currently have Customer Portal access, please contact the BPA Customer Portal Support team at customerportal@bpa.gov and/or 503-230-4226 or your Transmission Account Executive for more information about getting access to the BPA Customer Portal.