PHMSA MEGA RULE TEST–- ELIGIBLE PROJECT – COMPRESSOR STATION 184 TO COMPRESSOR STATION 154 - PIPELINE MAINTENANCE

In accordance with its FERC Gas Tariff and as posted on Natural's Outage Impact Report (X25- 1094390), Natural will be performing an ILI project on the OE#1 Line between CS 184, located in Beckham County, Oklahoma (Segment 6 of Natural's Midcontinent Zone) and CS 154, located in Gray County, Texas (Segment 6 of Natural's Midcontinent Zone).  Natural is required to shut in certain locations during this restriction, as set forth below. This ILI project is being performed pursuant to the PHMSA Mega Rule and, as set forth in its Tariff, is an Eligible Project (ID 4613) included on the Eligible Project List posted on Natural's internet website.  See Eligible Project ID, line name and location identified below (Exhibit F- Docket No. RP22-1222 Settlement, as updated on January 6, 2026 on Natural's interactive website).  This outage is subject to the provisions of Section 5.2 (c) (5) of the General Terms and Conditions of Natural's FERC Gas Tariff.

Project ID        Line Name                                               Location/Segment No.                                 

4613                   OKLAHOMA EXTENSION #1            CS 184 SAYRE TO CS 154

As such, effective for gas days indicated below, the following locations will be unavailable for deliveries or receipts until the work has been completed.

LOCATIONS UNAVAILABLE:

LOC 47097         MARKWEST/NGPL BUFFALO CREEK PROCESS   

TOOL RUN DATES:

Gas day Tuesday, May 26, 2026 and continuing through gas day Thursday, May 28, 2026 (Cleaning Tool)

Gas day Tuesday June 2, 2026 and continuing through gas day Thursday, June 4, 2026 (Caliper, MFL, and EMAT Tool)

Continue to monitor Natural's interactive website for any updates during this restriction.  Please contact your Account Director or Scheduling Representative if you have any questions.