Beginning November 17, 2025, for transacting Gas Day 12/1/2025 business, Guardian's newly implemented Customer Activities and Informational Postings site can be located at https://dtmidstream.trellisenergy.com/ptms/home/infopost/GPL. Data and reports needed for Gas Day 12/1/2025 business going forward should utilize this new site. Pursuant to FERC-required historical access to interstate pipeline information, reports for the ninety (90) Gas Days prior to 12/1/2025 will remain available on this URL until March 1, 2026.
Informational Postings
Price Index Reference
| SYMBOL | SHORT NAME | NAME | REGION | PUBLISHER |
| IGBDX21 | GD-MP-CHIC-CG | Chicago City Gate | Citygates | Platts |
| IGBDU21 | GD-MP-NNG-VENT | Nortdern, Ventura | Otders | Platts |
| IGBCW03 | IF-EMERSON-VIK | Chicago Citigates - Guardian | iFERC |
The subscription to each index renews on an annual basis and will continue until further notice. In the event a price is not published for a specific point and the index-based formula cannot be computed, the pipeline company will invoice the release according to NAESB 5.2.5.