Southern Natural Gas Notice 710373

-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 02/06/25)

-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 (2/10)

Tuesday (2/11)

Wednesday (2/12)

Thursday (2/13)

Friday (2/14)

Saturday (2/15)

Sunday (2/16)

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

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

798

798

798

798

798

798

798

Sesh (segment 380)

506

506

506

506

506

506

506

506

Gwinville Pool (segment 390)

1,707

1497

(210)

1497

(210)

1497

(210)

1497

(210)

1497

(210)

1497

(210)

1497

(210)

Gwinville Compressor Station: Scheduled Station Maintenance Proj-5211P2 (2/5/2025 - 2/26/2025)

Gwinville (segment 400)

234

234

234

234

234

234

234

234

Enterprise (segment 430)

2,450

2,450

2,450

2,450

2,450

2,450

2,450

2,450

Ellerslie (segment 490)

1,663

1593

(70)

1593

(70)

1593

(70)

1593

(70)

1593

(70)

1593

(70)

1593

(70)

Ellerslie Compressor Station: Scheduled Unit Maintenance Proj-52675 (2/10/2025 - 2/23/2025)

Ellerslie compressor station: Unscheduled unit outage Project-52674 (11/14/2024 - 2/23/2025)

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-52724 (1/30/2025 - 3/16/2025)

South Atlanta (segment 510)

537

537

537

537

537

537

537

537

Thomaston East (segment 530)

900

900

900

900

900

900

900

900

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 2025 (updated 02/06/25)

-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 (2/3 - 2/9)

Week 2 (2/10 - 2/16)

Week 3 (2/17 - 2/23)

Week 4 (2/24 - 3/2)

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

798

798

Sesh (segment 380)

506

506

506

Gwinville Pool (segment 390)

1,707

1497

(210)

1497

(210)

Gwinville Compressor Station: Scheduled Station Maintenance, Proj-5211P2 (2/5/2025 - 2/26/2025)

Gwinville (segment 400)

234

234

234

Enterprise (segment 430)

2,450

2,450

2,450

Auburn (segment 460)

2,095

1740

(355)

1740

(355)

Auburn Compressor Station: Scheduled Station Maintenance, Proj-5259 (2/17/2025 - 2/24/2025)

Ellerslie (segment 490)

1,663

1593

(70)

1,663

Ellerslie Compressor Station: Scheduled Unit Maintenance, Proj-52675 (2/10/2025 - 2/23/2025) Ellerslie compressor station: Unscheduled unit outage, Project-52674 (11/14/2024 - 2/23/2025)

Thomaston West (segment 490)

1,650

1605

(45)

1605

(45)

Thomaston Compressor Station: Unscheduled Unit Outage, Proj-52724 (1/30/2025 - 3/16/2025)

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 2025 (updated 02/06/25)

-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 (3/3 - 3/9)

Week 2 (3/10 - 3/16)

Week 3 (3/17 - 3/23)

Week 4 (3/24 - 3/30)

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

157

(77)

157

(77)

182

(52)

182

(52)

Gwinville Pickens Line north of Gwinville: Pipeline Maintenance(remediation), Proj-SNG-19050/20646 (3/22/2025 - 3/28/2025)

Gwinville Pickens Line north of Rankin: Pipeline Maintenance(remediation), Proj-SNG-19128 (3/17/2025

- 3/20/2025)

Gwinville Pickens Line south of Pickens: Pipeline Maintenance(remediation), Proj-SNG-19128 (3/13/2025 - 3/14/2025)

Gwinville Pickens Line south of Pickens: Pipeline Maintenance(remediation), Proj-SNG-19128/26277 (3/3/2025 - 3/10/2025)

Gwinville Pickens Line south of Rankin: Pipeline Maintenance(remediation), Proj-SNG-19050 (3/20/2025 - 3/21/2025)

Enterprise (segment 430)

2,450

2,450

2,450

2,450

2200

(250)

Enterprise Compressor Station: Scheduled Unit Maintenance, Proj-522216 (3/24/2025 - 3/31/2025)

Auburn (segment 460)

2,095

2,095

1770

(325)

1770

(325)

2,095

South Main Loop Line east of Auburn: Scheduled Pipeline Maintenance, Proj-SNG-24941 (3/14/2025 - 3/23/2025)

South Main Loop Line west of Ellerslie: Scheduled Pipeline Maintenance, Proj-SNG-24942 (3/14/2025 - 3/23/2025)

Ellerslie (segment 490)

1,663

1,663

1,663

1,663

1,663

Thomaston West (segment 490)

1,650

1605

(45)

1605

(45)

1,650

1,650

Thomaston Compressor Station: Unscheduled Unit Outage, Proj-52724 (1/30/2025 - 3/16/2025)

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 2025 (updated 02/06/25)

-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 (3/31 - 4/6)

Week 2 (4/7 - 4/13)

Week 3 (4/14 - 4/20)

Week 4 (4/21 - 4/27)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Onward (segment 30)

203

203

203

203

203

Louisville East (segment 50)

520

520

210

(310)

210

(310)

275

(245)

2nd North Main Line east of Pickens: Pipeline Maintenance(remediation), Proj-SNG-19047 (4/21/2025 - 5/2/2025)

2nd North Main Line east of Pickens: Pipeline Maintenance(remediation), Proj-SNG-19047 (M) (4/8/2025

- 4/18/2025)

Duncanville Lateral (segment 90)

36

36

36

36

36

Dearmanville (segment 150)

346

346

346

346

346

White Castle (segment 340)

772

772

772

772

772

Sesh (segment 380)

500

500

500

500

500

Gwinville (segment 400)

234

199

(35)

150

(84)

150

(84)

234

2nd North Main Line east of Pickens: Pipeline Maintenance(remediation), Proj-SNG-19047 (4/8/2025 - 4/18/2025)

Gwinville Pickens Line north of Gwinville: Pipeline Maintenance(remediation), Proj-SNG- 19050/20646/21938 (3/31/2025 - 4/7/2025)

Enterprise (segment 430)

2,306

2056

(250)

2136

(170)

2,306

2,306

Enterprise Compressor Station: Scheduled Unit Maintenance, Proj-522216 (3/24/2025 - 3/31/2025) Enterprise Compressor Station: Scheduled Unit Maintenance, Proj-522216 (4/1/2025 - 4/7/2025)

Selma (segment 460)

2,293

2,293

2,293

1993

(300)

1993

(300)

South Main Loop Line east of Selma: Scheduled Pipeline Maintenance, Proj-SNG-24945 (4/18/2025 - 4/25/2025)

Auburn (segment 460)

1,953

1813

(140)

1813

(140)

1813

(140)

1,953

South Main Loop Line west of Ellerslie: Scheduled Pipeline Maintenance, Proj-SNG-24943 (4/5/2025 - 4/14/2025)

South Main Loop Line west of Ellerslie: Scheduled Pipeline Maintenance, Proj-SNG-24944 (4/5/2025 - 4/14/2025)

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

Holy Trinity (segment 655)

127

127

97

(30)

127

127

Holy Trinity Compressor Station: Scheduled Unit Maintenannce, Proj-58051 (4/7/2025 - 4/12/2025)

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.

May 2025 (updated 02/06/25)

-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 (4/28 - 5/4)

Week 2 (5/5 - 5/11)

Week 3 (5/12 - 5/18)

Week 4 (5/19 - 5/25)

Week 5 (5/26 - 6/1)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Onward (segment 30)

203

203

203

203

203

203

Louisville East (segment 50)

520

275

(245)

520

520

520

520

2nd North Main Line east of Pickens: Pipeline Maintenance(remediation), Proj-SNG-19047 (4/21/2025 - 5/2/2025)

Duncanville Lateral (segment 90)

36

36

36

36

36

36

Dearmanville (segment 150)

346

346

346

346

346

346

White Castle (segment 340)

772

772

772

772

772

772

Sesh (segment 380)

500

500

500

500

500

500

Gwinville (segment 400)

234

234

150

(84)

150

(84)

150

(84)

234

2nd North Main Line east of Pickens: Pipeline Maintenance(remediation), Proj-SNG-19047 (5/5/2025 - 5/21/2025)

Enterprise (segment 430)

2,306

2,306

2,306

2,306

2,306

2,306

Ellerslie (segment 490)

1,547

1,547

1,547

1,547

1,547

1,547

South Atlanta (segment 510)

522

522

522

522

522

522

Thomaston East (segment 530)

849

849

849

849

849

849

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.