Southern Natural Gas Notice 711491

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TSP/TSP Name: 6900518-SOUTHERN NATURAL GAS CO.	Critical: Y
Notice Type Desc (1): PIPELINE CONDITIONS	Notice Type Desc (2): CURRENT PIPELINE CONDITIONS
Notice Eff Date/Time: 12/15/2025 12:13:27PM	Notice End Date/Time: 12/16/2025 9:00:00am
Post Date/Time: 12/15/2025 12:13:27 PM	Notice ID: 711491
Reqrd Rsp: 1	Rsp Date: 12/15/2025
Notice Stat Desc: SUPERSEDE	Prior Notice: 711490
Subject: Revised Pipeline Conditions 12-15-25

Notice Text:

Effective Intraday 1 Cycle for gas day Monday, December 15, 2025, and continuing until further notice, SNG restricted the following:

OPERATIONAL FLOW ORDERS (OFO)

Type 3 Level 2 OFO North System will be in effect for the start of the gas day, Monday, December 15, 2025, until further notice, Notice ID # 711480

Type 3 Level 2 OFO South System will be in effect for the start of the gas day, Monday, December 15, 2025, until further notice, Notice ID # 711481

RESTRICTIONS (SEGMENT)

· 50 (LOUISVILLE EAST) - Exceeds Operating Capacity - Reductions through OP Services

· 195 (CHAT LINE - EAST TENNESSEE) - Exceeds Operating Capacity - Reductions into OP Services

· 340 (WHITE CASTLE) - Exceeds Operating Capacity - Reductions into OP Services

· 380 (SNG - SESH) - Exceeds Operating Capacity - Reductions into OP Services

· 400 (GWINVILLE) - Exceeds Operating Capacity - Reductions through OP Services

· 430 (ENTERPRISE) - Exceeds Operating Capacity - Reductions into OP Services

· 490 (ELLERSLIE) - Exceeds Operating Capacity - Reductions through OP Services

· 570 (WRENS) - Exceeds Operating Capacity - Reductions into OP Services

· 710 (PAVO) BH - Exceeds Operating Capacity

· 740 (PILGRIMS PRIDE) BH - Exceeds Operating Capacity

· 750 (CORDELE AREA LINE) - Exceeds Operating Capacity

RESTRICTIONS (LINEPACK)

Payback Due Pipe – None

Payback Due Shipper – Not Accepting Until Further Notice

RESTRICTIONS (STORAGE)

Incremental Interruptible Storage (ISS) Injections not allowed - See Notice # 710565

Type 3 / 4 OFO Probability (Unlikely (UL); Likely (L); Too Close to Call (TC); Highly Likely (HL)

December 15, 2025 – UL

Type 6 OFO Probability (Unlikely (UL); Too Close to Call (TC); Highly Likely (HL)

December 15, 2025 – UL for Short and UL for Long Imbalances

TSP/TSP Name: 6900518-SOUTHERN NATURAL GAS CO.	Critical: Y
Notice Type Desc (1): PIPELINE CONDITIONS	Notice Type Desc (2): CURRENT PIPELINE CONDITIONS
Notice Eff Date/Time: 12/15/2025 12:13:27PM	Notice End Date/Time: 12/16/2025 9:00:00am
Post Date/Time: 12/15/2025 12:13:27 PM	Notice ID: 711491
Reqrd Rsp: 1	Rsp Date: 12/15/2025
Notice Stat Desc: SUPERSEDE	Prior Notice: 711490
Subject: Revised Pipeline Conditions 12-15-25