Southern Natural Gas Notice 711353

-Restrictions to Primary In-Path transportation services may be necessary.

SNG - Outage Impact Report

-Restrictions to In-Path transportation services may be necessary.

Seven Day Forecast (updated 11/06/25)

-Restrictions to Interruptible and Out of Path transportation services may be necessary.

-No anticipated impact to transportation services.

Station / Seg

Est Nominal Design Capacity (Thousand Dth)

Monday (11/10)

Tuesday (11/11)

Wednesday (11/12)

Thursday (11/13)

Friday (11/14)

Saturday (11/15)

Sunday (11/16)

Primary Outage(s) that may Impact Throughput

Est. Operational Capacity (Operational Impact) - Thousand Dth

Onward (segment 30)

209

209

209

209

209

209

209

209

Louisville East (segment 50)

520

203

(317)

203

(317)

203

(317)

203

(317)

203

(317)

203

(317)

520

Louisville Compressor Station: Scheduled Station Maintenance Proj-4132HS (11/10/2025 - 11/15/2025)

Duncanville Lateral (segment 90)

36

36

36

36

36

36

36

36

Dearmanville (segment 150)

355

355

355

355

355

355

355

355

White Castle (segment 340)

798

728

(70)

598

(200)

598

(200)

598

(200)

598

(200)

598

(200)

598

(200)

Duck Lake Franklinton Line north of White Castle: Scheduled Pipeline Maintenance Proj-SNG-22856 (11/11/2025 - 11/22/2025)

White Castle Compressor Station: Scheduled Unit Maintenance Proj-50109 (11/10/2025 - 12/6/2025)

LA West Leg (segment 350)

798

540

(258)

798

798

798

798

798

798

White Castle Franklinton loop line north of White Castle: Pipeline Maintenance(replacement) Proj-SNG-2993 (10/14/2025 - 11/10/2025)

Sesh (segment 380)

506

506

506

506

506

506

506

506

Gwinville (segment 400)

234

234

234

234

234

234

234

234

Bay Springs (segment 420)

1,887

1647

(240)

1647

(240)

1487

(400)

1487

(400)

1487

(400)

1487

(400)

1647

(240)

Bay Springs Compressor Station: Scheduled Unit Maintenance Proj-52161 (7/8/2025 - 3/31/2026)

Bay Springs Compressor Station: Scheduled Unit Maintenance Proj-52163 (11/12/2025 - 11/15/2025)

Enterprise (segment 430)

2,450

2365

(85)

2365

(85)

2425

(25)

2425

(25)

2425

(25)

2425

(25)

2,450

Enterprise Compressor Station: Scheduled Unit Maintenance Proj-522210 (11/12/2025 - 11/15/2025)

Enterprise Compressor Station: Scheduled Unit Maintenance Proj-522211 (11/3/2025 - 11/11/2025)

Ellerslie (segment 490)

1,663

1,663

1,663

1,663

1,663

1,663

1,663

1,663

Thomaston West (segment 490)

1,650

1605

(45)

1605

(45)

1460

(190)

1460

(190)

1605

(45)

1,650

1,650

Thomaston Compressor Station: Scheduled Pipeline Maintenance(valve replacement) Proj-5272 (11/3/2025 - 11/14/2025)

Thomaston Compressor Station: Scheduled Station Maintenance(valve replacement) Proj-5272 (11/12/2025 - 11/13/2025)

South Atlanta (segment 510)

537

537

537

537

537

537

537

537

Thomaston East (segment 530)

900

900

900

900

900

900

900

900

Hall Gate (segment 560)

700

606

(94)

606

(94)

606

(94)

606

(94)

606

(94)

606

(94)

606

(94)

South Main Line east of Hall Gate: Unscheduled Pipeline Maintenance(remediation) Proj-SNG-21445 (10/28/2025 - 12/14/2025)

East/South Wrens (segment 560)

724

554

(170)

554

(170)

554

(170)

554

(170)

554

(170)

554

(170)

554

(170)

Wrens Compressor Station: Scheduled Maintenance Proj-52885 (11/6/2025 - 11/16/2025)

South Georgia (segment 650)

143

143

143

143

143

143

143

143

Albany (segment 660)

77

36

(41)

36

(41)

36

(41)

36

(41)

36

(41)

77

77

Albany Compressor Station: Scheduled Station Maintenance Proj-58171 (10/20/2025 - 11/14/2025)

This document is updated on a weekly basis and outage schedules/impacts are subject to change as the week progresses.

Dates posted on DART should be deemed correct in the event of conflicts between DART posted dates and dates on this report. The impacts sheet are based on steady-state hydraulic models assuming recent operating flows, conditions, and various unit outages.

-Restrictions to Primary In-Path transportation services may be necessary.

SNG - Outage Impact Report

-Restrictions to In-Path transportation services may be necessary.

November 2025 (updated 11/06/25)

-Restrictions to Interruptible and Out of Path transportation services may be necessary.

-No anticipated impact to transportation services.

Station / Seg

Est Nominal Design Capacity (Thousand Dth)

Week 1 (11/3 - 11/9)

Week 2 (11/10 - 11/16)

Week 3 (11/17 - 11/23)

Week 4 (11/24 - 11/30)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Onward (segment 30)

209

209

209

Duncanville Lateral (segment 90)

36

36

36

Dearmanville (segment 150)

355

355

355

White Castle (segment 340)

798

590

(208)

590

(208)

Duck Lake Franklinton Line north of White Castle: Scheduled Pipeline Maintenance, Proj-SNG-22856 (11/11/2025 - 11/22/2025)

White Castle Compressor Station: Scheduled Unit Maintenance, Proj-50109 (11/10/2025 - 12/6/2025) White Castle Franklinton Loop Line north of White Castle: Scheduled Pipeline Maintenance, Proj-SNG- 22856 (11/23/2025 - 12/4/2025)

Sesh (segment 380)

506

506

506

Gwinville (segment 400)

234

234

234

Bay Springs (segment 420)

1,887

1647

(240)

1647

(240)

Bay Springs Compressor Station: Scheduled Unit Maintenance, Proj-52161 (7/8/2025 - 3/31/2026)

Enterprise (segment 430)

2,450

2395

(55)

2,450

Enterprise Compressor Station: Scheduled Unit Maintenance, Proj-522211-13 (11/17/2025 - 11/21/2025)

Elmore (segment 460)

2,155

1930

(225)

1930

(225)

Elmore Compressor Station: Scheduled Unit Maintenance, Proj-525112 (11/17/2025 - 11/24/2025)

Ellerslie (segment 490)

1,663

1,663

1,663

South Atlanta (segment 510)

537

537

537

Thomaston East (segment 530)

900

900

900

Hall Gate (segment 560)

700

606

(94)

606

(94)

South Main Line east of Hall Gate: Unscheduled Pipeline Maintenance(remediation), Proj-SNG-21445 (10/28/2025 - 12/14/2025)

South Georgia (segment 650)

143

143

143

This document is updated on a weekly basis and outage schedules/impacts are subject to change as the week progresses.

Dates posted on DART should be deemed correct in the event of conflicts between DART posted dates and dates on this report.

The impacts sheet are based on steady-state hydraulic models assuming recent operating flows, conditions, and various unit outages.

-Restrictions to Primary In-Path transportation services may be necessary.

SNG - Outage Impact Report

-Restrictions to In-Path transportation services may be necessary.

December 2025 (updated 11/06/25)

-Restrictions to Interruptible and Out of Path transportation services may be necessary.

-No anticipated impact to transportation services.

Station / Seg

Est Nominal Design Capacity (Thousand Dth)

Week 1 (12/1 - 12/7)

Week 2 (12/8 - 12/14)

Week 3 (12/15 - 12/21)

Week 4 (12/22 - 12/28)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Onward (segment 30)

209

209

209

209

209

Duncanville Lateral (segment 90)

36

36

36

36

36

Dearmanville (segment 150)

355

355

355

355

355

White Castle (segment 340)

798

590

(208)

798

798

798

White Castle Compressor Station: Scheduled Unit Maintenance, Proj-50109 (11/10/2025 - 12/6/2025) White Castle Franklinton Loop Line north of White Castle: Scheduled Pipeline Maintenance, Proj-SNG- 22856 (11/23/2025 - 12/4/2025)

Sesh (segment 380)

500

500

500

500

500

Gwinville (segment 400)

234

234

234

234

234

Bay Springs (segment 420)

1,887

1647

(240)

1647

(240)

1647

(240)

1647

(240)

Bay Springs Compressor Station: Scheduled Unit Maintenance, Proj-52161 (7/8/2025 - 3/31/2026)

Enterprise (segment 430)

2,450

2,450

2,450

2,450

2,450

Ellerslie (segment 490)

1,663

1,663

1,663

1,663

1,663

South Atlanta (segment 510)

537

537

537

537

537

Thomaston East (segment 530)

900

900

900

900

900

Hall Gate (segment 560)

700

606

(94)

606

(94)

700

700

South Main Line east of Hall Gate: Unscheduled Pipeline Maintenance(remediation), Proj-SNG-21445 (10/28/2025 - 12/14/2025)

South Georgia (segment 650)

143

143

143

143

143

This document is updated on a weekly basis and outage schedules/impacts are subject to change as the week progresses.

Dates posted on DART should be deemed correct in the event of conflicts between DART posted dates and dates on this report.

The impacts sheet are based on steady-state hydraulic models assuming recent operating flows, conditions, and various unit outages.

-Restrictions to Primary In-Path transportation services may be necessary.

SNG - Outage Impact Report

-Restrictions to In-Path transportation services may be necessary.

January 2026 (updated 11/06/25)

-Restrictions to Interruptible and Out of Path transportation services may be necessary.

-No anticipated impact to transportation services.

Station / Seg

Est Nominal Design Capacity (Thousand Dth)

Week 1 (12/29 - 1/4)

Week 2 (1/5 - 1/11)

Week 3 (1/12 - 1/18)

Week 4 (1/19 - 1/25)

Week 5 (1/26 - 2/1)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Onward (segment 30)

209

209

209

209

209

209

Duncanville Lateral (segment 90)

36

36

36

36

36

36

Dearmanville (segment 150)

355

355

355

355

355

355

White Castle (segment 340)

798

798

798

798

798

798

Sesh (segment 380)

500

500

500

500

500

500

Gwinville (segment 400)

234

234

234

234

234

234

Bay Springs (segment 420)

1,887

1647

(240)

1647

(240)

1647

(240)

1647

(240)

1647

(240)

Bay Springs Compressor Station: Scheduled Unit Maintenance, Proj-52161 (7/8/2025 - 3/31/2026)

Enterprise (segment 430)

2,450

2,450

2,450

2,450

2,450

2,450

Ellerslie (segment 490)

1,663

1,663

1,663

1,663

1,663

1,663

South Atlanta (segment 510)

537

537

537

537

537

537

Thomaston East (segment 530)

900

900

900

900

900

900

South Georgia (segment 650)

143

143

143

143

143

143

This document is updated on a weekly basis and outage schedules/impacts are subject to change as the week progresses.

Dates posted on DART should be deemed correct in the event of conflicts between DART posted dates and dates on this report.

The impacts sheet are based on steady-state hydraulic models assuming recent operating flows, conditions, and various unit outages.

-Restrictions to Primary In-Path transportation services may be necessary.

SNG - Outage Impact Report

-Restrictions to In-Path transportation services may be necessary.

February 2026 (updated 11/06/25)

-Restrictions to Interruptible and Out of Path transportation services may be necessary.

-No anticipated impact to transportation services.

Station / Seg

Est Nominal Design Capacity (Thousand Dth)

Week 1 (2/2 - 2/8)

Week 2 (2/9 - 2/15)

Week 3 (2/16 - 2/22)

Week 4 (2/23 - 3/1)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Onward (segment 30)

209

209

209

209

209

Duncanville Lateral (segment 90)

36

36

36

36

36

Dearmanville (segment 150)

355

355

355

355

355

White Castle (segment 340)

798

798

798

798

798

Sesh (segment 380)

500

500

500

500

500

Gwinville (segment 400)

234

234

234

234

234

Bay Springs (segment 420)

1,887

1647

(240)

1647

(240)

1647

(240)

1647

(240)

Bay Springs Compressor Station: Scheduled Unit Maintenance, Proj-52161 (7/8/2025 - 3/31/2026)

Enterprise (segment 430)

2,450

2,450

2,450

2,450

2,450

Ellerslie (segment 490)

1,663

1,663

1,663

1,663

1,663

South Atlanta (segment 510)

537

537

537

537

537

Thomaston East (segment 530)

900

900

900

900

900

South Georgia (segment 650)

143

143

143

143

143

This document is updated on a weekly basis and outage schedules/impacts are subject to change as the week progresses.

Dates posted on DART should be deemed correct in the event of conflicts between DART posted dates and dates on this report.

The impacts sheet are based on steady-state hydraulic models assuming recent operating flows, conditions, and various unit outages.