SOC Follow-Up Report – Location Specific Pack Condition

DURATION OF EVENT

A location-specific Strained Operating Condition (“SOC”) for a Pack condition was declared by EPNG as follows:

Effective: Gas Days October 3 through 5, 2025

Imbalance Threshold: 5%

AFFECTED AREA(S)/LOCATION(S)

The following locations were subject to the requirements of the SOC declaration:

IMSQUITE (398670)

DMINDSCA (57248)

TIMELINE

[October 3, 2025, 8:37 am Mountain Daylight Time (MDT)] EPNG declared a location-specific SOC for a Pack condition effective Gas Day October 3, 2025, with the imbalance threshold set at 5% (Critical Notice No. 626320).

[October 6, 2025, 6:45 am MDT] EPNG lifted the subject location-specific SOC effective Gas Day October 6, 2025 (Critical Notice No. 626349).  

APPLICABLE OPERATING CONDITIONS

Friday, Gas Day October 3

--     EPNG's system linepack started the day at 7,825 MMcf, which was a decrease of 99 MMcf compared to the previous Gas Day.

--    At 8:37 am MDT, EPNG declared a location-specific SOC for a Pack condition (Notice No. 626320) for the locations listed above effective Gas Day October 3.  In its notice, EPNG stated that linepack was within an acceptable level, but continued packing of the system by the locations listed above would undermine EPNG's ability to maintain system linepack within acceptable levels and manage system integrity.

--    The locations listed above packed EPNG's system by 39 MMcf on the prior Gas Day.

--    Washington Ranch was on full injection, averaging 104 MMcf.

Saturday, Gas Day October 4

--     EPNG's system linepack started the day at 7,829 MMcf, which was an increase of 4 MMcf compared to the previous Gas Day.

--  Washington Ranch was on full injection, averaging 99 MMcf.

Sunday, Gas Day October 5

--     EPNG's system linepack started the day at 7,960 MMcf, which was an increase of 131 MMcf compared to the previous Gas Day.

--   Washington Ranch was on full injection, averaging 103 MMcf.

Monday, Gas Day October 6

--     EPNG's system linepack started the day at 8,024 MMcf, which was an increase of 64 MMcf compared to the previous Gas Day.

--      At 6:45 am MDT, EPNG lifted the subject location-specific SOC for a Pack condition effective Gas Day October 6, 2025.  The locations listed above adjusted their scheduled quantities to align with actual deliveries.

--  Washington Ranch was on injection, averaging 99 MMcf.

ACTIONS TAKEN BY EPNG AND SHIPPERS 

The following actions were taken:

1.            EPNG contacted the interconnecting parties at the affected locations prior to declaring the SOC and requested that the scheduled quantities be adjusted to match the actual flowing gas quantities.

2.            EPNG declared a location-specific SOC for a Pack condition on October 3, 2025, at 8:37 am MDT.  The SOC was in effect for Gas Days October 3, 2025, through October 5, 2025.

3.            After EPNG declared the SOC, the affected customers took corrective action to align their scheduled supplies with their actual deliveries.