Southern Natural Gas Notice 712600

-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 10/29/26)

-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 (11/2)

Tuesday (11/3)

Wednesday (11/4)

Thursday (11/5)

Friday (11/6)

Saturday (11/7)

Sunday (11/8)

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

Duncanville Lateral (segment 90)

36

36

36

36

36

36

36

36

Dearmanville (segment 150)

355

335

(20)

335

(20)

335

(20)

335

(20)

355

355

355

Bell Mills Compressor Station: Scheduled Unit Maintenance Proj-4500-3 (11/2/2026 - 11/5/2026)

White Castle (segment 340)

798

738

(60)

548

(250)

673

(125)

673

(125)

673

(125)

738

(60)

738

(60)

Shadyside Compressor Station: Scheduled Station Maintenance Proj-5000 (11/3/2026)

Shadyside Compressor Station: Scheduled Unit Maintenance Proj-5000-2 (11/4/2026 - 11/6/2026)

Shadyside Compressor Station: Scheduled Unit Maintenance Proj-5000-4-5 (11/3/2026)

Shadyside Compressor Station: Scheduled Unit Maintenance Proj-5000-5 (11/1/2026 - 11/20/2026)

LA West Leg (segment 350)

798

733

(65)

733

(65)

733

(65)

733

(65)

733

(65)

733

(65)

733

(65)

Franklinton Compressor Station: Scheduled Unit Maintenance Proj-512215 (11/1/2026 - 11/8/2026)

Sesh (segment 380)

507

507

507

507

507

507

507

507

Gwinville (segment 400)

234

234

234

234

234

234

234

234

Bay Springs (segment 420)

1,817

1702

(115)

1702

(115)

1702

(115)

1702

(115)

1702

(115)

1702

(115)

1702

(115)

Bay Springs Compressor Station: Scheduled Unit Maintenance Proj-5216-1 (11/1/2026 - 3/31/2027)

Enterprise (segment 430)

2,450

2195

(255)

2195

(255)

2195

(255)

2195

(255)

2195

(255)

2195

(255)

2195

(255)

Enterprise Compressor Station: Scheduled Unit Maintenance Proj-5222-15 (11/1/2026 - 11/15/2026)

South Main line east of Enterprise: Unscheduled Pipeline Maintenance - CAO (11/1/2026 - 3/31/2027)

York

'ZONE 1/2 BOUNDARY'

(segment 440)

2,449

2194

(255)

2194

(255)

2194

(255)

2194

(255)

2194

(255)

2194

(255)

2194

(255)

York Compressor Station: Scheduled Unit Maintenance Proj-5230-1 (11/1/2026 - 11/15/2026)

Ellerslie (segment 490)

1,663

1608

(55)

1608

(55)

1608

(55)

1608

(55)

1608

(55)

1608

(55)

1608

(55)

Thomaston Compressor Station: Scheduled Unit Maintenance Proj-5272-5 (11/2/2026 - 12/6/2026)

South Atlanta (segment 510)

537

537

537

537

537

537

537

537

Thomaston East (segment 530)

900

900

900

900

900

900

900

900

Ocmulgee (segment 530)

801

721

(80)

721

(80)

721

(80)

721

(80)

721

(80)

721

(80)

721

(80)

Ocmulgee Compressor Station: Unscheduled Unit Outage Proj-5277-4 (11/1/2026 - 11/15/2026)

South Georgia (segment 650)

143

143

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.

November 2026 (updated 10/29/26)

-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 (11/2 - 11/8)

Week 2 (11/9 - 11/15)

Week 3 (11/16 - 11/22)

Week 4 (11/23 - 11/29)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Onward (segment 30)

209

209

209

209

Duncanville Lateral (segment 90)

36

36

36

36

Dearmanville (segment 150)

355

355

355

355

White Castle (segment 340)

798

738

(60)

738

(60)

728

(70)

Shadyside Compressor Station: Scheduled Unit Maintenance, Proj-5000-5 (11/1/2026 - 11/20/2026) White Castle Compressor Station: Scheduled Unit Maintenance, Proj-5010-10 (11/23/2026 - 12/6/2026)

Sesh (segment 380)

507

507

507

507

Gwinville (segment 400)

234

63

(171)

234

234

Pickens Compressor Station: Scheduled Station Maintenance(valve), Proj-4125 (11/9/2026 - 11/10/2026)

Bay Springs (segment 420)

1,817

1702

(115)

1702

(115)

1702

(115)

Bay Springs Compressor Station: Scheduled Unit Maintenance, Proj-5216-1 (11/1/2026 - 3/31/2027)

Enterprise (segment 430)

2,450

2195

(255)

2400

(50)

2400

(50)

Enterprise Compressor Station: Scheduled Unit Maintenance, Proj-5222-15 (11/1/2026 - 11/15/2026) South Main line east of Enterprise: Unscheduled Pipeline Maintenance - CAO (11/1/2026 - 3/31/2027)

York

'ZONE 1/2 BOUNDARY'

(segment 440)

2,449

2194

(255)

2,449

2,449

York Compressor Station: Scheduled Unit Maintenance, Proj-5230-1 (11/1/2026 - 11/15/2026)

Ellerslie (segment 490)

1,663

1608

(55)

1608

(55)

1608

(55)

Thomaston Compressor Station: Scheduled Unit Maintenance, Proj-5272-5 (11/2/2026 - 12/6/2026)

South Atlanta (segment 510)

537

537

537

537

Thomaston East (segment 530)

900

900

900

900

Ocmulgee (segment 530)

801

721

(80)

801

801

Ocmulgee Compressor Station: Unscheduled Unit Outage, Proj-5277-4 (11/1/2026 - 11/15/2026)

South Georgia (segment 650)

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.

December 2026 (updated 10/29/26)

-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 (11/30 - 12/6)

Week 2 (12/7 - 12/13)

Week 3 (12/14 - 12/20)

Week 4 (12/21 - 12/27)

Week 5 (12/28 - 1/3)

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

728

(70)

733

(65)

738

(60)

798

798

White Castle Compressor Station: Scheduled Unit Maintenance, Proj-5010-10 (11/23/2026 - 12/6/2026) White Castle Compressor Station: Scheduled Unit Maintenance, Proj-5010-6 (12/14/2026 - 12/18/2026) White Castle Compressor Station: Scheduled Unit Maintenance, Proj-5010-7 (12/7/2026 - 12/11/2026)

Sesh (segment 380)

500

500

500

500

500

500

Gwinville (segment 400)

234

234

234

234

234

234

Bay Springs (segment 420)

1,817

1702

(115)

1702

(115)

1702

(115)

1702

(115)

1702

(115)

Bay Springs Compressor Station: Scheduled Unit Maintenance, Proj-5216-1 (11/1/2026 - 3/31/2027)

Enterprise (segment 430)

2,450

2400

(50)

2400

(50)

2400

(50)

2400

(50)

2400

(50)

South Main line east of Enterprise: Unscheduled Pipeline Maintenance - CAO (11/1/2026 - 3/31/2027)

Ellerslie (segment 490)

1,663

1608

(55)

1,663

1,663

1,663

1,663

Thomaston Compressor Station: Scheduled Unit Maintenance, Proj-5272-5 (11/2/2026 - 12/6/2026)

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.

January 2027 (updated 10/29/26)

-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 (1/4 - 1/10)

Week 2 (1/11 - 1/17)

Week 3 (1/18 - 1/24)

Week 4 (1/25 - 1/31)

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 Compressor Station: Scheduled Unit Maintenance, Proj-5216-1 (11/1/2026 - 3/31/2027)

Bay Springs (segment 420)

1,817

1702

(115)

1702

(115)

1702

(115)

1702

(115)

South Main line east of Enterprise: Unscheduled Pipeline Maintenance - CAO (11/1/2026 - 3/31/2027)

Enterprise (segment 430)

2,450

2400

(50)

2400

(50)

2400

(50)

2400

(50)

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.

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

SNG - Outage Impact Report

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

February 2027 (updated 10/29/26)

-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 (2/1 - 2/7)

Week 2 (2/8 - 2/14)

Week 3 (2/15 - 2/21)

Week 4 (2/22 - 2/28)

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

798

798

798

798

Sesh (segment 380)

500

500

500

500

500

Gwinville (segment 400)

234

234

234

234

234

Bay Springs Compressor Station: Scheduled Unit Maintenance, Proj-5216-1 (11/1/2026 - 3/31/2027)

Bay Springs (segment 420)

1,817

1702

(115)

1702

(115)

1702

(115)

1702

(115)

South Main line east of Enterprise: Unscheduled Pipeline Maintenance - CAO (11/1/2026 - 3/31/2027)

Enterprise (segment 430)

2,450

2400

(50)

2400

(50)

2400

(50)

2400

(50)

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.