Southern Natural Gas Notice 710625

-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 04/10/25)

-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 (4/14)

Tuesday (4/15)

Wednesday (4/16)

Thursday (4/17)

Friday (4/18)

Saturday (4/19)

Sunday (4/20)

Primary Outage(s) that may Impact Throughput

Est. Operational Capacity (Operational Impact) - Thousand Dth

Onward (segment 30)

203

203

203

203

203

203

203

203

Louisville East (segment 50)

520

275

(245)

275

(245)

275

(245)

275

(245)

275

(245)

275

(245)

275

(245)

2nd North Main Line east of Pickens: Pipeline Maintenance(remediation) Proj-SNG-19047 (M) (4/14/2025 - 4/25/2025)

Duncanville Lateral (segment 90)

36

36

36

36

36

36

36

36

Dearmanville (segment 150)

346

346

346

346

346

346

346

346

White Castle (segment 340)

772

772

772

772

772

772

772

772

Sesh (segment 380)

506

506

506

506

506

506

506

506

Gwinville Pool (segment 390)

1,607

1217

(390)

1217

(390)

1217

(390)

1217

(390)

1217

(390)

1217

(390)

1217

(390)

Gwinville Compressor Station: Scheduled Station Maintenance Proj-5211P4B (4/2/2025 - 4/15/2025)

Gwinville Compressor Station: Scheduled Station Maintenance Proj-5211P4C (4/12/2025 - 4/21/2025)

Gwinville Compressor Station: Scheduled Unit Maintenance Proj-521113 (4/14/2025 - 4/20/2025)

Gwinville (segment 400)

234

150

(84)

150

(84)

150

(84)

150

(84)

150

(84)

150

(84)

150

(84)

2nd North Main Line east of Pickens: Pipeline Maintenance(remediation) Proj-SNG-19047 (4/14/2025 - 4/25/2025)

Enterprise (segment 430)

2,306

2051

(255)

2051

(255)

2051

(255)

2051

(255)

2126

(180)

2126

(180)

2126

(180)

Enterprise Compressor Station: Scheduled Unit Maintenance Proj-522210 (4/14/2025 - 4/17/2025)

Enterprise Compressor Station: Unit maintenance Porj-5222B (4/17/2025 - 4/21/2025)

York (segment 440)

2,305

2125

(180)

2125

(180)

2125

(180)

2125

(180)

2125

(180)

2125

(180)

2125

(180)

York Compressor Station: Scheduled Unit Maintenance Proj-52301 (4/7/2025 - 10/31/2025)

Auburn (segment 460)

1,953

1628

(325)

1628

(325)

1628

(325)

1628

(325)

1628

(325)

1628

(325)

1628

(325)

South Main 2nd Loop Line at Auburn Compressor Station: Pipeline Maintenance(MLV repair) (4/14/2025 - 4/18/2025)

South Main Loop Line east of Auburn: Scheduled Pipeline Maintenance Proj-SNG-24941 (4/9/2025 - 4/23/2025)

South Main Loop Line west of Ellerslie: Scheduled Pipeline Maintenance Proj-SNG-24942 (4/9/2025 - 4/23/2025)

Ellerslie (segment 490)

1,547

1317

(230)

1317

(230)

1317

(230)

1317

(230)

1317

(230)

1,547

1,547

Thomaston Compressor Station: Scheduled Unit Maintenance Proj-52721 (4/14/2025 - 4/18/2025)

Thomaston West (segment 490)

1,535

1495

(40)

1495

(40)

1495

(40)

1495

(40)

1495

(40)

1495

(40)

1495

(40)

Thomaston Compressor Station: Unscheduled Unit Outage Proj-52723 (1/30/2025 - 4/20/2025)

South Atlanta (segment 510)

522

522

522

522

522

522

522

522

Thomaston East (segment 530)

849

849

849

849

849

849

849

849

East/South Wrens (segment 560)

680

620

(60)

680

680

680

680

680

680

Wrens Compressor Station: Scheduled Unit Maintenance Proj-52885 (3/18/2025 - 4/14/2025)

South Georgia (segment 650)

127

127

127

127

127

127

127

127

Holy Trinity (segment 655)

127

97

(30)

97

(30)

97

(30)

97

(30)

97

(30)

97

(30)

97

(30)

Mainline #1 north of Holy Trinity Compressor Station: Scheduled Pipeline Maintenance (4/7/2025 - 4/27/2025)

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.

April 2025 (updated 04/10/25)

-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

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

Louisville East (segment 50)

520

275

(245)

(4/14/2025 - 4/25/2025)

Duncanville Lateral (segment 90)

36

36

Talladega Branch Loop Line south of Dearmanville: Scheduled Pipeline Maintenance, Proj-SNG-36904

Pell City Station (segment 140)

474

304

(170)

(4/22/2025 - 4/25/2025)

Dearmanville (segment 150)

346

346

White Castle (segment 340)

772

772

Sesh (segment 380)

506

506

Gwinville Compressor Station: Scheduled Station Maintenance, Proj-5211P4C (4/12/2025 - 4/21/2025)

Gwinville Pool (segment 390)

1,607

1217

(390)

Gwinville Compressor Station: Scheduled Unit Maintenance, Proj-521113 (4/21/2025 - 4/25/2025)

2nd North Main Line east of Pickens: Pipeline Maintenance(remediation), Proj-SNG-19047 (4/14/2025 -

Gwinville (segment 400)

234

150

(84)

4/25/2025)

Enterprise Compressor Station: Scheduled Station Maintenance , Proj-5222WC (4/24/2025 - 5/4/2025)

Enterprise (segment 430)

2,306

2103

(203)

Enterprise Compressor Station: Unit maintenance, Porj-5222B (4/17/2025 - 4/21/2025)

York Compressor Station: Scheduled Unit Maintenance, Proj-52301 (4/7/2025 - 10/31/2025)

York (segment 440)

2,305

2125

(180)

South Main Loop Line east of Auburn: Scheduled Pipeline Maintenance, Proj-SNG-24941 (4/9/2025 -

Auburn (segment 460)

1,953

1628

(325)

4/23/2025)

South Main Loop Line west of Ellerslie: Scheduled Pipeline Maintenance, Proj-SNG-24942 (4/9/2025 - 4/23/2025)

Ellerslie (segment 490)

1,547

1,547

South Atlanta (segment 510)

522

522

Thomaston East (segment 530)

849

849

South Georgia (segment 650)

127

127

Mainline #1 north of Holy Trinity Compressor Station: Scheduled Pipeline Maintenance (4/7/2025 -

Holy Trinity (segment 655)

127

97

(30)

4/27/2025)

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 04/10/25)

-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

153

(50)

123

(80)

203

203

203

Onward Compressor Station: Scheduled Unit Maintenance, Proj-411511 Proj-411512 (5/5/2025 - 5/9/2025)

Onward Compressor Station: Scheduled Unit Maintenance, Proj-411512 (4/28/2025 - 5/2/2025)

Duncanville Lateral (segment 90)

36

36

36

36

36

36

Tarrant (segment 130)

563

563

563

533

(30)

533

(30)

533

(30)

North Main Line west of Tarrant: Scheduled Pipeline Maintenance(PT) (5/12/2025 - 5/28/2025)

Dearmanville (segment 150)

346

346

346

346

346

346

White Castle (segment 340)

772

772

772

772

772

772

LA West Leg (segment 350)

695

695

695

695

535

(160)

535

(160)

Duck Lake Franklinton Line north of White Castle: Scheduled Pipeline Maintenance, Proj-SNG-2753 (5/22/2025 - 6/5/2025)

Sesh (segment 380)

500

500

500

434

(66)

452

(48)

500

SESH: Scheduled Maintenance (M) (5/12/2025) SESH: Scheduled Maintenance (M) (5/13/2025 - 5/14/2025)

SESH: Scheduled Maintenance (M) (5/15/2025) SESH: Scheduled Maintenance (M) (5/19/2025 - 5/20/2025)

SESH: Scheduled Maintenance (M) (5/21/2025)

Gwinville Pool (segment 390)

1,607

1217

(390)

1217

(390)

1,607

1,607

1,607

Gwinville Compressor Station: Scheduled Station Maintenance, Proj-521113P5A (4/29/2025 - 5/2/2025) Gwinville Compressor Station: Scheduled Station Maintenance, Proj-5211P5 (4/28/2025 - 5/8/2025)

Gwinville (segment 400)

234

0

(234)

0

(234)

149

(85)

149

(85)

149

(85)

Gwinville Compressor Station: Scheduled Station Maintenance, Proj-5211P5 (4/28/2025 - 5/8/2025) Pickens Compressor Station: Scheduled Unit Maintenance , Proj-41251 (5/12/2025 - 5/30/2025)

Bay Springs (segment 420)

1,675

1,675

1,675

1485

(190)

1,675

1,675

Bay Springs Compressor Station: Scheduled Unit Maintenance, Proj-52163 (5/12/2025 - 5/16/2025)

Enterprise (segment 430)

2,306

2103

(203)

2103

(203)

2,306

2,306

2,306

Enterprise Compressor Station: Scheduled Station Maintenance , Proj-5222WC (4/24/2025 - 5/4/2025) Enterprise Compressor Station: Scheduled Station Maintenance, Proj-5222T (5/9/2025)

York (segment 440)

2,305

2125

(180)

2125

(180)

2125

(180)

2125

(180)

2125

(180)

York Compressor Station: Scheduled Unit Maintenance, Proj-52301 (4/7/2025 - 10/31/2025)

Selma (segment 460)

2,293

2,293

2,293

1993

(300)

1843

(450)

2,293

Elmore Compressor Station: Scheduled Unit Maintenance, Proj-525112 (5/19/2025 - 5/23/2025) South Main Loop Line east of Selma: Scheduled Pipeline Maintenance, Proj-SNG-24945 (5/12/2025 - 5/20/2025)

Auburn (segment 460)

1,953

1813

(140)

1813

(140)

1,953

1,953

1,953

South Main Loop Line west of Ellerslie: Scheduled Pipeline Maintenance, Proj-SNG-24943 (4/28/2025 - 5/11/2025)

South Main Loop Line west of Ellerslie: Scheduled Pipeline Maintenance, Proj-SNG-24944 (4/28/2025 - 5/11/2025)

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

Hall Gate (segment 560)

705

635

(70)

635

(70)

635

(70)

635

(70)

635

(70)

Hall Gate Compressor Station: Scheduled Unit Maintenance, Proj-52833 (4/28/2025 - 5/26/2025)

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.

June 2025 (updated 04/10/25)

-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 (6/2 - 6/8)

Week 2 (6/9 - 6/15)

Week 3 (6/16 - 6/22)

Week 4 (6/23 - 6/29)

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)

772

772

772

772

772

Duck Lake Franklinton Line north of White Castle: Scheduled Pipeline Maintenance, Proj-SNG-2753

LA West Leg (segment 350)

695

535

(160)

695

695

695

(5/22/2025 - 6/5/2025)

Sesh (segment 380)

500

500

500

500

500

Gwinville (segment 400)

234

234

234

234

234

Enterprise (segment 430)

2,306

2,306

2,306

2,306

2,306

York Compressor Station: Scheduled Unit Maintenance, Proj-52301 (4/7/2025 - 10/31/2025)

York (segment 440)

2,305

2125

(180)

2125

(180)

2125

(180)

2125

(180)

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.

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

SNG - Outage Impact Report

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

July 2025 (updated 04/10/25)

-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 (6/30 - 7/6)

Week 2 (7/7 - 7/13)

Week 3 (7/14 - 7/20)

Week 4 (7/21 - 7/27)

Week 5 (7/28 - 8/3)

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)

772

772

772

772

772

772

Sesh (segment 380)

500

500

500

500

500

500

Gwinville (segment 400)

234

234

234

234

234

234

Enterprise (segment 430)

2,306

2,306

2,306

2,306

2,306

2,306

York (segment 440)

2,305

2125

(180)

2125

(180)

2125

(180)

2125

(180)

2125

(180)

York Compressor Station: Scheduled Unit Maintenance, Proj-52301 (4/7/2025 - 10/31/2025)

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.