Southern Natural Gas Notice 711667

-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 02/05/26)

-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 (2/9)

Tuesday (2/10)

Wednesday (2/11)

Thursday (2/12)

Friday (2/13)

Saturday (2/14)

Sunday (2/15)

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

McConnells (segment 110)

642

607

(35)

607

(35)

607

(35)

607

(35)

607

(35)

607

(35)

607

(35)

2nd North Main line east of McConnells: Unscheduled Pipeline Maintenance(remediation) Proj-SNG-41508 (1/2/2026 - 2/22/2026)

Dearmanville (segment 150)

355

355

355

355

355

355

355

355

White Castle (segment 340)

798

798

798

798

798

798

798

798

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)

1,887

1647

(240)

1647

(240)

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

2,450

2,450

Selma (segment 460)

2,435

2335

(100)

2335

(100)

2335

(100)

2335

(100)

2335

(100)

2335

(100)

2335

(100)

Selma Compressor Station: Unscheduled Unit Maintenance Proj-52451 (12/22/2025 - 2/22/2026)

Ellerslie (segment 490)

1,663

1513

(150)

1513

(150)

1513

(150)

1513

(150)

1513

(150)

1513

(150)

1513

(150)

Ellerslie Compressor Station: Unscheduled Unit Outage Proj-52678 (12/7/2025 - 3/29/2026)

Thomaston West (segment 490)

1,650

1605

(45)

1605

(45)

1605

(45)

1605

(45)

1605

(45)

1605

(45)

1605

(45)

Thomaston Compressor Station: Unscheduled Unit Outage Proj-52721 (2/5/2026 - 2/15/2026)

South Atlanta (segment 510)

537

537

537

537

537

537

537

537

Thomaston East (segment 530)

900

900

900

900

900

900

900

900

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.

February 2026 (updated 02/05/26)

-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 (2/2 - 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

Duncanville Lateral (segment 90)

36

36

36

2nd North Main line east of McConnells: Unscheduled Pipeline Maintenance(remediation), Proj-SNG-

McConnells (segment 110)

642

607

(35)

642

41508 (1/2/2026 - 2/22/2026)

Dearmanville (segment 150)

355

355

355

White Castle (segment 340)

798

798

798

Sesh (segment 380)

507

507

507

Gwinville (segment 400)

234

234

234

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

Bay Springs (segment 420)

1,887

1647

(240)

1647

(240)

Enterprise (segment 430)

2,450

2,450

2,450

Selma Compressor Station: Unscheduled Unit Maintenance, Proj-52451 (12/22/2025 - 2/22/2026)

Selma (segment 460)

2,435

2335

(100)

2,435

Ellerslie Compressor Station: Unscheduled Unit Outage, Proj-52678 (12/7/2025 - 3/29/2026)

Ellerslie (segment 490)

1,663

1513

(150)

1513

(150)

South Atlanta (segment 510)

537

537

537

Thomaston East (segment 530)

900

900

900

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.

March 2026 (updated 02/05/26)

-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 (3/2 - 3/8)

Week 2 (3/9 - 3/15)

Week 3 (3/16 - 3/22)

Week 4 (3/23 - 3/29)

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

Tarrant (segment 130)

539

539

539

539

539

Dearmanville (segment 150)

355

355

355

355

355

White Castle (segment 340)

798

798

798

798

798

Franklinton Compressor Station: Scheduled Unit Maintenance, Proj-512216 (3/16/2026 - 3/29/2026)

LA West Leg (segment 350)

798

798

798

733

(65)

733

(65)

SESH: Scheduled Maintenance (M) (3/4/2026 - 3/6/2026)

Sesh (segment 380)

500

434

(66)

500

500

500

Gwinville Compressor Station: Scheduled Unit Maintenance, Proj-52111-3 (3/2/2026 - 3/15/2026)

Gwinville (segment 400)

234

190

(44)

190

(44)

234

234

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

Bay Springs (segment 420)

1,887

1647

(240)

1647

(240)

1647

(240)

1647

(240)

Enterprise Compressor Station: Scheduled Unit Maintenance, Proj-522212 (3/16/2026 - 3/31/2026)

Enterprise (segment 430)

2,450

2,450

2275

(175)

2360

(90)

2400

(50)

Enterprise Compressor Station: Scheduled Unit Maintenance, Proj-522216 (3/9/2026 - 3/12/2026) South Main 2nd loop line east of Enterprise: Scheduled Pipeline Maintenance, Proj-SNG-8792 (3/9/2026 - 3/19/2026)

York Compressor Station: Scheduled Unit Maintenance, Proj-52301 (3/16/2026 - 3/31/2026)

York (segment 440)

2,449

2,449

2,449

2354

(95)

2354

(95)

Selma Compressor Station: Scheduled Station Maintenance, Proj-52451-2-3 (3/16/2026 - 3/20/2026)

Selma (segment 460)

2,435

2,435

2,435

2120

(315)

2,435

Elmore Compressor Station: Scheduled Unit Maintenance, Proj-52519 (3/23/2026 - 3/29/2026)

Elmore (segment 460)

2,155

2,155

2,155

2,155

2070

(85)

Ellerslie Compressor Station: Unscheduled Unit Outage, Proj-52678 (12/7/2025 - 3/29/2026)

Ellerslie (segment 490)

1,663

1513

(150)

1513

(150)

1513

(150)

1513

(150)

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.

April 2026 (updated 02/05/26)

-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 (3/30 - 4/5)

Week 2 (4/6 - 4/12)

Week 3 (4/13 - 4/19)

Week 4 (4/20 - 4/26)

Week 5 (4/27 - 5/3)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Onward (segment 30)

203

203

203

203

203

203

Duncanville Lateral (segment 90)

36

36

36

36

36

36

Dearmanville (segment 150)

346

346

346

346

346

346

White Castle (segment 340)

750

750

750

750

750

750

Sesh (segment 380)

500

500

500

500

500

500

Gwinville (segment 400)

234

234

200

(34)

200

(34)

200

(34)

200

(34)

Gwinville Compressor Station: Scheduled Unit Maintenance, Proj-52112 (4/20/2026 - 5/3/2026) Gwinville Compressor Station: Scheduled Unit Maintenance, Proj-52112 (4/6/2026 - 4/19/2026)

Gwinville East (segment 410)

1,655

1337

(318)

1,655

1,655

1,655

1,655

Gwinville Compressor Station: Scheduled Station Maintenance, Proj-5211 (3/30/2026)

Bay Springs (segment 420)

1,677

1437

(240)

1597

(80)

1597

(80)

1597

(80)

1597

(80)

Bay Springs Compressor Station: Scheduled Unit Maintenance, Proj-52161 (4/1/2026 - 10/31/2026) Bay Springs Compressor Station: Scheduled Unit Maintenance, Proj-52161 (7/8/2025 - 3/31/2026)

Enterprise (segment 430)

2,306

2236

(70)

2236

(70)

2236

(70)

2,306

2,306

Enterprise Compressor Station: Scheduled Unit Maintenance, Proj-522212 (3/16/2026 - 3/31/2026) Enterprise Compressor Station: Scheduled Unit Maintenance, Proj-522212 (4/1/2026 - 4/19/2026)

York (segment 440)

2,305

2210

(95)

2215

(90)

2010

(295)

2235

(70)

2,305

South Main 2nd loop line east of York: Scheduled Pipeline Maintenance, Proj-SNG-36214 (4/13/2026 - 4/23/2026)

York Compressor Station: Scheduled Unit Maintenance, Proj-52301 (3/16/2026 - 3/31/2026) York Compressor Station: Scheduled Unit Maintenance, Proj-52301 (4/1/2026 - 4/12/2026) York Compressor Station: Scheduled Unit Maintenance, Proj-52303 (4/17/2026)

Gallion (Segment 440)

2,300

2,300

2,300

1965

(335)

2255

(45)

2255

(45)

Gallion Compressor Station: Scheduled Unit Maintenance , Proj-523610 (4/16/2026) Gallion Compressor Station: Scheduled Unit Maintenance, Proj-52368 (4/13/2026 - 4/26/2026) Gallion Compressor Station: Scheduled Unit Maintenance, Proj-52369 (4/27/2026 - 5/10/2026)

Selma (segment 460)

2,293

2,293

2,293

1973

(320)

2,293

2,293

Selma Compressor Station: Scheduled Unit Maintenance, Proj-52453 (4/15/2026)

Elmore (segment 460)

2,010

2,010

2,010

1755

(255)

2,010

2,010

Elmore Compressor Station: Scheduled Unit Maintenance, Proj-525112 (4/14/2026)

Auburn (segment 460)

1,953

1,953

1,953

1693

(260)

1,953

1,953

Auburn Compressor Station: Scheduled Unit Maintenance, Proj-52593 (4/13/2026)

Ellerslie (segment 490)

1,547

1,547

1,547

1317

(230)

1,547

1,547

Ellerslie Compressor Station: Scheduled Station Maintenance, Proj-5267 (4/15/2026 - 4/17/2026)

South Atlanta (segment 510)

522

522

522

522

522

522

Thomaston East (segment 530)

849

849

849

849

849

849

East/South Wrens (segment 560)

680

680

680

680

590

(90)

680

Wrens Compressor Station: Scheduled Unit Maintenance, Proj-52881-2-3 (4/20/2026 - 4/21/2026) Wrens Compressor Station: Scheduled Unit Maintenance, Proj-52884 (4/21/2026 - 4/22/2026) Wrens Compressor Station: Scheduled Unit Maintenance, Proj-52885 (4/23/2026 - 4/24/2026)

South Georgia (segment 650)

127

127

127

127

127

127

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.

May 2026 (updated 02/05/26)

-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 (5/4 - 5/10)

Week 2 (5/11 - 5/17)

Week 3 (5/18 - 5/24)

Week 4 (5/25 - 5/31)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Onward (segment 30)

203

203

203

203

203

Duncanville Lateral (segment 90)

36

36

36

36

36

Dearmanville (segment 150)

346

346

346

346

346

White Castle (segment 340)

750

750

750

750

750

Sesh (segment 380)

500

500

500

500

500

Gwinville (segment 400)

234

234

234

234

234

Bay Springs Compressor Station: Scheduled Unit Maintenance, Proj-52161 (4/1/2026 - 10/31/2026)

Bay Springs (segment 420)

1,675

1595

(80)

1595

(80)

1595

(80)

1595

(80)

Enterprise Compressor Station: Scheduled Unit Maintenance, Proj-522215 (5/18/2026 - 6/21/2026)

Enterprise (segment 430)

2,306

2,306

2,306

2126

(180)

2126

(180)

Gallion Compressor Station: Scheduled Unit Maintenance, Proj-52369 (4/27/2026 - 5/10/2026)

Gallion (Segment 440)

2,300

2255

(45)

2,300

2,300

2,300

Ellerslie (segment 490)

1,547

1,547

1,547

1,547

1,547

South Atlanta (segment 510)

522

522

522

522

522

Thomaston East (segment 530)

849

849

849

849

849

South Georgia (segment 650)

127

127

127

127

127

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.