Transmission Register
The Transmission Register (TR) provides market participants with the ability to access TR data, including official listing of transmission lines, associated facilities, and entitlements.
Access the application through the MPP*
*Certificate required
The ISO provides limited access to the register of transmission facilities and entitlements (RTFE) to participants with a demonstrated, legitimate business need in accordance with FERC's January 24, 2003 Order in Docket No. ER03-219. RTFE information is considered critical energy infrastructure information.
- Transmission Control Agreement ISO Register NDA 09/27/2013, 4:25 PM
- Transmission Control Agreement ISO Register Screening Process V2 07/30/2013, 4:30 PM
Manuals
- Seasonal Ratings Autoloader Template Question and Answer 10/08/2025, 12:29 PM
- Seasonal Ratings Autoloader Template Instructions 09/29/2025, 1:26 PM
- Seasonal Ratings Autoloader Template 06/25/2025, 1:10 PM
- Transmission Register PTO Administrator User Manual 11/20/2023, 4:04 PM
- Transmission Register Component Linking Manual 11/20/2023, 4:04 PM
- Transmission Register Autoloader User Manual 11/20/2023, 4:04 PM
- Transmission Register CAISO and PTO General User Manual 11/20/2023, 4:04 PM