Tennessee Gas Pipeline Notice 402674

-Primary impact restrictions may be necessary

TGP - Outage Impact Report

-Major impact restrictions may be necessary

Seven Day Forecast (updated 07/09/26)

-Minor impact restrictions may be necessary depending on flow conditions

-Little to no impact, though minor outages may cause incremental reductions

Station / Seg

Est Nominal

Operating Capacity (Thousand Dth)

Monday

(7/13)

Tuesday

(7/14)

Wednesday

(7/15)

Thursday

(7/16)

Friday

(7/17)

Saturday

(7/18)

Sunday

(7/19)

Primary Outage(s) that may Impact Throughput

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 409 (Donna Line) (segment 490 FH)

564

564

564

564

564

564

564

564

Station 1

(segment 101 BH)

399

399

399

399

399

399

399

399

Station 9

(segment 109 BH)

1,027

945

(82)

1015

(12)

890

(137)

890

(137)

890

(137)

890

(137)

890

(137)

MLV 11-1A to MLV 11-1: Anomaly Remediation (7/15/2026 - 7/27/2026) MLV 12-1 to MLV 11-1A: PHMSA Immediate (7/15/2026 - 7/27/2026)

MLV 13-1 to MLV 12-1: Anomaly Remediation (7/15/2026 - 7/27/2026) MLV 4-1 to MLV 5-1: Emergent Repair (6/9/2026 - 7/13/2026)

MLV 9-1D to MLV 10-1: Anomaly Remediation (7/9/2026 - 7/14/2026)

Station 17

(segment 117 FH)

1,122

1000

(122)

1000

(122)

1000

(122)

1000

(122)

1000

(122)

1000

(122)

1000

(122)

MLV 19-3 TO MLV 20-3A: Pipe Replacement (M) (7/6/2026 - 8/3/2026)

Station 25

(segment 125 FH)

1,078

1035

(43)

1035

(43)

1035

(43)

1035

(43)

1035

(43)

1035

(43)

1035

(43)

MLV 25-2 to MLV 26-2: Pipe Replacement (7/11/2026 - 7/29/2026) MLV 26-2 Relocation: Highway 59 Widening (7/13/2026 - 7/29/2026)

Station 47

(segment 143 FH)

1,343

1330

(13)

1240

(103)

1330

(13)

1330

(13)

1330

(13)

1330

(13)

1330

(13)

MLV 40-1D to MLV 47-1S: Pig Run - Maintenance (7/14/2026) MLV 55-1 to MLV 56-1: PHMSA Immediate (5/11/2026 - 7/31/2026)

Station 63

(segment 163 FH)

1,242

1117

(125)

1117

(125)

1117

(125)

1117

(125)

1117

(125)

1117

(125)

1117

(125)

MLV 54-3 to MLV 106-3: Emergent Repair - CAO (2/26/2026 - 12/31/2026)

Station 823

(segment 823 BH)

734

734

734

734

734

734

734

734

Station 534 South of Pool (segment 530 BH)

1,550

985

(565)

985

(565)

985

(565)

985

(565)

985

(565)

985

(565)

985

(565)

MLV 533-2 to MLV 534-2: Pipe Replacement (M) (6/4/2026 - 9/4/2026) Sta 530: Unit 1A - Bearings (8/25/2025 - 12/31/2026)

Sta 530: Unit 3A - Crankshaft Replacement (6/9/2025 - 12/31/2026) Sta 530: Unit 5A - Top-End Overhaul (6/9/2025 - 12/31/2026)

MLV 548

(segment 542 BH)

1,647

1565

(82)

1565

(82)

1565

(82)

1565

(82)

1565

(82)

1600

(47)

1600

(47)

MLV 539-2 to MLV 540-2: Anomaly Remediation (7/16/2026 - 7/18/2026) Sta 542: Unit 2A - Emergent Repair (4/7/2026 - 9/30/2026)

Sta 542: Unit 3A - Emergent Repair (3/26/2026 - 8/31/2026) Sta 546: Unit 6A - Turbo Replacment (7/8/2026 - 7/17/2026) Sta 546: Unit 7A - Metal in Oil (7/14/2025 - 7/31/2026)

Station 860

(segment 548 BH)

1,405

1240

(165)

1195

(210)

1245

(160)

1195

(210)

1245

(160)

1272

(133)

1272

(133)

MLV 557-3 to MLV 559-3: Pig Runs - Cal / IMU & MFL-A 6/4/26 (7/16/2026)

MLV 557-3 to MLV 559-3: Pig Runs - Cleaning / Gauge 6/2/26 (7/14/2026) MLV 559-2A to MLV 560-2: PHMSA Immediate (7/6/2026 - 7/14/2026)

Sta 555: Unit 1B - Hot Gas Path (7/13/2026 - 8/14/2026) Sta 555: Unit 5A - Foundation Regrout (1/20/2026 - 7/17/2026)

Station 860 North (Segment 860 BH)

1,874

1846

(28)

1846

(28)

1846

(28)

1846

(28)

1846

(28)

1846

(28)

1846

(28)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2025 - 12/31/2026)

Station 110

(segment 187 BH)

(south thru Kentucky)

2,685

1963

(722)

1963

(722)

1963

(722)

1963

(722)

2150

(535)

2150

(535)

2150

(535)

MLV 107-7 to 110-7: Valve Installation & Crossover Work (7/7/2026 - 7/27/2026)

MLV 109-7 to MLV 110-7: Pipe Replacement (7/7/2026 - 7/27/2026) MLV 54-3 to MLV 106-3: Emergent Repair - CAO (2/26/2026 - 12/31/2026) Sta 106: C Building - Install Water Trech System (7/13/2026 - 7/17/2026)

Sta 87: Unit 3D - Power side Overhaul (6/22/2026 - 9/30/2026) Sta 871: Unit 3A - Engine Maintenance (7/13/2026 - 7/31/2026) Sta 96 Campbellsville: Annual ESD Test (7/14/2026 - 7/15/2026)

Sta 96 Campbellsville: Annual Substation Inspection (7/13/2026 - 7/16/2026)

Station 114

(segment 114 BH)

907

726

(181)

726

(181)

726

(181)

726

(181)

726

(181)

726

(181)

726

(181)

MLV 113-2 to MLV 114-2: Emergent Repair (7/7/2026 - 9/27/2026)

Station 204

(Segment 204 BH)

1,828

1,828

1,828

1,828

1,828

1,828

1,828

1,828

Station 230C (segment 296 FH)

743

370

(373)

370

(373)

475

(268)

475

(268)

743

743

743

Sta 230C: Annual ESD (M) (7/13/2026 - 7/14/2026)

MLV 230B-205 to MLV 230B-206A: Pig Run - Gauge/Cleaning (7/15/2026) MLV 230B-205 to MLV 230B-206A: Pig Run - Cal/IMU/MFL-A Combo (7/16/2026)

Station 245

(segment 245 FH)

986

970

(16)

760

(226)

760

(226)

760

(226)

970

(16)

970

(16)

970

(16)

Sta 245: Unit 1A & 2A - Exhaust System & HP Fuel (4/27/2026 - 11/1/2026) Sta 245-1 to MLV 249-1: Pig Run - Cal/IMU (7/15/2026)

Sta 245-1 to MLV 249-1: Pig Run - Gauge/Cleaning tool (7/14/2026) Sta 245-1 to MLV 249-1: Pig Run - MFL-C (7/16/2026)

MLV 256 West

(segment 249 FH)

1,203

1045

(158)

1045

(158)

1045

(158)

1045

(158)

1045

(158)

1,203

1,203

MLV 253-1 to MLV 253-1R: Anomaly Remediation (7/12/2026 - 7/17/2026)

-Primary impact restrictions may be necessary

TGP - Outage Impact Report

-Major impact restrictions may be necessary

Seven Day Forecast (updated 07/09/26)

-Minor impact restrictions may be necessary depending on flow conditions

-Little to no impact, though minor outages may cause incremental reductions

Station / Seg

Est Nominal

Operating Capacity (Thousand Dth)

Monday

(7/13)

Tuesday

(7/14)

Wednesday

(7/15)

Thursday

(7/16)

Friday

(7/17)

Saturday

(7/18)

Sunday

(7/19)

Primary Outage(s) that may Impact Throughput

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 261 Discharge East (segment 261 FH)

888

888

888

888

888

888

888

888

Station 307

(segment 307 BH)

1,153

1,153

1,153

1,153

1,153

1,153

1,153

1,153

Station 315

(segment 315 BH)

1,823

1,823

1,823

1,823

1,823

1,823

1,823

1,823

MLV 324

(segment 324 FH)

1,767

1,767

1,767

1,767

1,767

1,767

1,767

1,767

Station 405 HC Line (segment 299 FH)

794

794

794

794

794

794

794

794

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.

-Primary impact restrictions may be necessary

TGP - Outage Impact Report

-Major impact restrictions may be necessary

July 2026 (updated 07/09/26)

-Minor impact restrictions may be necessary depending on flow conditions

-Little to no impact, though minor outages may cause incremental reductions

Station # / Lateral

Est Nominal Operating Capacity (Thousand Dth)

Week 1

(6/29 - 7/5)

Week 2

(7/6 - 7/12)

Week 3

(7/13 - 7/19)

Week 4

(7/20 - 7/26)

Week 5

(7/27 - 8/2)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 409 (Donna Line) (segment 490 FH)

564

564

564

Station 1

(segment 101 BH)

399

399

399

Station 9

(segment 109 BH)

1,027

890

(137)

885

(142)

MLV 11-1A to MLV 11-1: Anomaly Remediation (7/15/2026 - 7/27/2026) MLV 12-1 to MLV 11-1A: PHMSA Immediate (7/15/2026 - 7/27/2026)

MLV 13-1 to MLV 12-1: Anomaly Remediation (7/15/2026 - 7/27/2026) MLV 16-1 to MLV 15-1: PHMSA Immediate (7/28/2026 - 8/3/2026) MLV 16-1R to MLV 16-1: PHMSA Immediate (7/28/2026 - 8/3/2026)

Station 17

(segment 117 FH)

1,122

1000

(122)

1000

(122)

MLV 17-3DL to MLV 18-3A: Anomaly Remediation (7/27/2026 - 8/2/2026) MLV 19-3 TO MLV 20-3A: Pipe Replacement (M) (7/6/2026 - 8/3/2026)

Station 25

(segment 125 FH)

1,078

955

(123)

1035

(43)

MLV 25-2 to MLV 26-2: Pipe Replacement (7/11/2026 - 7/29/2026) MLV 26-2 Relocation: Highway 59 Widening (7/13/2026 - 7/29/2026) Sta 25: Annual ESD Test (7/21/2026)

Station 47

(segment 143 FH)

1,343

1330

(13)

1330

(13)

MLV 55-1 to MLV 56-1: PHMSA Immediate (5/11/2026 - 7/31/2026)

Station 63

(segment 163 FH)

1,242

1117

(125)

1117

(125)

MLV 54-3 to MLV 106-3: Emergent Repair - CAO (2/26/2026 - 12/31/2026)

Station 823

(segment 823 BH)

734

734

734

Station 834

(segment 834 BH)

683

683

600

(83)

Sta 834: Station Outage (7/29/2026 - 7/31/2026)

Station 534 South of Pool (segment 530 BH)

1,550

985

(565)

985

(565)

MLV 533-2 to MLV 534-2: Pipe Replacement (M) (6/4/2026 - 9/4/2026) Sta 529: Unit 1A - Engine Inspection (7/21/2026)

Sta 530: Unit 1A - Bearings (8/25/2025 - 12/31/2026)

Sta 530: Unit 3A - Crankshaft Replacement (6/9/2025 - 12/31/2026) Sta 530: Unit 5A - Top-End Overhaul (6/9/2025 - 12/31/2026)

MLV 548

(segment 542 BH)

1,647

1600

(47)

1600

(47)

Sta 542: Unit 2A - Emergent Repair (4/7/2026 - 9/30/2026) Sta 542: Unit 3A - Emergent Repair (3/26/2026 - 8/31/2026) Sta 546: Unit 7A - Metal in Oil (7/14/2025 - 7/31/2026)

Station 860

(segment 548 BH)

1,593

1460

(133)

1460

(133)

Sta 555: Unit 1B - Hot Gas Path (7/13/2026 - 8/14/2026)

Station 860 North (Segment 860 BH)

1,874

1846

(28)

1846

(28)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2025 - 12/31/2026)

Station 110

(segment 187 BH)

(south thru Kentucky)

2,685

2150

(535)

2150

(535)

MLV 101-1 to MLV 102-1: Anomaly Remediation (7/20/2026 - 7/25/2026) MLV 102-1 to MLV 103-1: Anomaly Remediation (7/26/2026 - 7/30/2026) MLV 107-7 to 110-7: Valve Installation & Crossover Work (7/7/2026 - 7/27/2026)

MLV 109-4 to 110-4: Valve Installation & Crossover Work (7/28/2026 - 8/11/2026)

MLV 109-4 to MLV 110-4: Pipe Replacement (7/28/2026 - 8/11/2026) MLV 109-7 to MLV 110-7: Pipe Replacement (7/7/2026 - 7/27/2026)

MLV 54-3 to MLV 106-3: Emergent Repair - CAO (2/26/2026 - 12/31/2026) MLV 96-3BR to MLV 96-3BL: Spike Test (7/27/2026 - 8/31/2026)

Sta 87: Unit 3D - Power side Overhaul (6/22/2026 - 9/30/2026)

Sta 871: Unit 3A - Engine Maintenance (7/13/2026 - 7/31/2026)

Station 114

(segment 114 BH)

907

726

(181)

726

(181)

MLV 113-2 to MLV 114-2: Emergent Repair (7/7/2026 - 9/27/2026)

-Primary impact restrictions may be necessary

TGP - Outage Impact Report

-Major impact restrictions may be necessary

July 2026 (updated 07/09/26)

-Minor impact restrictions may be necessary depending on flow conditions

-Little to no impact, though minor outages may cause incremental reductions

Station # / Lateral

Est Nominal Operating Capacity (Thousand Dth)

Week 1

(6/29 - 7/5)

Week 2

(7/6 - 7/12)

Week 3

(7/13 - 7/19)

Week 4

(7/20 - 7/26)

Week 5

(7/27 - 8/2)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 204

(Segment 204 BH)

1,828

1,828

1,828

Station 237

(segment 237 FH)

1,006

1,006

780

(226)

MLV 237-1 to MLV 245-1: Pig Run - Cleaning/Gauge (7/27/2026) MLV 237-1 to MLV 245-1: Pig Run - MFL-C (7/29/2026)

Station 245

(segment 245 FH)

986

970

(16)

970

(16)

Sta 245: Unit 1A & 2A - Exhaust System & HP Fuel (4/27/2026 - 11/1/2026)

MLV 256 West

(segment 249 FH)

1,203

535

(668)

1,203

MLV 249-2 to MLV 254-2: Gauge/Cleaning tool (7/20/2026) MLV 249-2 to MLV 254-2: Hardspot/Geo (7/23/2026)

MLV 249-2 to MLV 254-2: MFL-A/IMU (7/21/2026)

Station 261 Discharge East (segment 261 FH)

888

888

888

Station 307

(segment 307 BH)

1,153

1110

(43)

1115

(38)

Sta 219: Unit 1B - Protective Device Checks & GHG (7/20/2026 - 7/24/2026) Sta 219: Unit 1B - Save Air System (7/20/2026 - 7/31/2026)

Sta 307: Unit 1A - Protective Device Checks (7/20/2026 - 7/24/2026) Sta 307: Unit 2A - Protective Device Checks (7/20/2026 - 7/24/2026) Sta 307: Unit 3A - Protective Device Checks (7/20/2026 - 7/24/2026) Sta 307: Unit 4A - Protective Device Checks (7/20/2026 - 7/24/2026)

Station 313 Discharge (segment 399 FH)

797

797

720

(77)

Sta 313: Unit 1C - Substation Inspection (7/30/2026 - 7/31/2026)

Station 315

(segment 315 BH)

1,823

1,823

1,823

Station 321

(segment 321 FH)

2,102

1715

(387)

2,102

Sta 321: Station Valves for ESD System (7/21/2026 - 7/23/2026)

MLV 324

(segment 324 FH)

1,767

1,767

1450

(317)

Sta 325: Station Outage (7/28/2026 - 7/30/2026)

Station 405 HC Line (segment 299 FH)

794

794

794

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.

-Primary impact restrictions may be necessary

TGP - Outage Impact Report

-Major impact restrictions may be necessary

August 2026 (updated 07/09/26)

-Minor impact restrictions may be necessary depending on flow conditions

-Little to no impact, though minor outages may cause incremental reductions

Station # / Lateral

Est Nominal Operating Capacity

(Thousand Dth)

Week 1

(8/3 - 8/9)

Week 2

(8/10 - 8/16)

Week 3

(8/17 - 8/23)

Week 4

(8/24 - 8/30)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 409 (Donna Line) (segment 490 FH)

564

564

564

564

564

Station 1

(segment 101 BH)

399

399

399

399

399

Station 9

(segment 109 BH)

1,027

885

(142)

640

(387)

640

(387)

1,027

MLV 16-1 to MLV 15-1: PHMSA Immediate (7/28/2026 - 8/3/2026) MLV 16-1R to MLV 16-1: PHMSA Immediate (7/28/2026 - 8/3/2026)

MLV 5-2 to MLV 1-2D: Pig Run - Cleaning Gauge (M) (8/13/2026) MLV 5-2 to MLV 1-2D: Pig Run - Cleaning Gauge (M) (8/14/2026) MLV 5-2 to MLV 1-2D: Pig Run - Cleaning Gauge (M) (8/15/2026) MLV 5-2 to MLV 1-2D: Pig Run - Cleaning Gauge (M) (8/16/2026) MLV 5-2 to MLV 1-2D: Pig Run - Cleaning Gauge (M) (8/17/2026) MLV 5-2 to MLV 1-2D: Pig Run - Cleaning Gauge (M) (8/18/2026) MLV 5-2 to MLV 1-2D: Pig Run - Cleaning Gauge (M) (8/19/2026) MLV 5-2 to MLV 1-2D: Pig Run - TDW MDS (M) (8/20/2026)

Station 17

(segment 117 FH)

1,122

1000

(122)

1100

(22)

1100

(22)

1100

(22)

MLV 19-1 TO MLV 20-1A: Pipe Replacement (M) (8/6/2026 - 9/15/2026) MLV 19-3 TO MLV 20-3A: Pipe Replacement (M) (7/6/2026 - 8/3/2026)

Station 25

(segment 125 FH)

1,078

925

(153)

925

(153)

925

(153)

1,078

MLV 26-3 Relocation: Highway 59 Widening (M) (8/3/2026 - 8/20/2026)

Station 47

(segment 143 FH)

1,343

1,343

1105

(238)

1,343

1,343

MLV 40-3D to MLV 47-3S: Pig Run - Maintenance Cleaning (8/11/2026) MLV 40-4D to MLV 47-4S: Pig Run - Maintenance (8/13/2026)

Station 63

(segment 163 FH)

1,242

901

(341)

901

(341)

1117

(125)

1117

(125)

MLV 54-3 to MLV 106-3: Emergent Repair - CAO (2/26/2026 - 12/31/2026) MLV 77-3 to MLV 77-3A: Pipe Replacements (8/3/2026 - 8/13/2026) MLV 82-2C to MLV 83-2: Anomaly Remediation (8/3/2026 - 8/7/2026)

Station 823

(segment 823 BH)

734

734

734

734

734

Station 534 South of Pool (segment 530 BH)

1,550

985

(565)

985

(565)

985

(565)

985

(565)

MLV 533-2 to MLV 534-2: Pipe Replacement (M) (6/4/2026 - 9/4/2026) Sta 530: Unit 1A - Bearings (8/25/2025 - 12/31/2026)

Sta 530: Unit 3A - Crankshaft Replacement (6/9/2025 - 12/31/2026) Sta 530: Unit 5A - Top-End Overhaul (6/9/2025 - 12/31/2026)

MLV 548

(segment 542 BH)

1,647

1635

(12)

1635

(12)

1635

(12)

1240

(407)

Sta 542 Dekalb: Annual ESD Test (8/25/2026 - 8/27/2026) Sta 542: Unit 2A - Emergent Repair (4/7/2026 - 9/30/2026) Sta 542: Unit 3A - Emergent Repair (3/26/2026 - 8/31/2026)

Station 860

(segment 548 BH)

1,593

1460

(133)

1460

(133)

1,593

1,593

Sta 555: Unit 1B - Hot Gas Path (7/13/2026 - 8/14/2026)

Station 860 North (Segment 860 BH)

1,874

1846

(28)

1846

(28)

1846

(28)

1846

(28)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2025 - 12/31/2026)

-Primary impact restrictions may be necessary

TGP - Outage Impact Report

-Major impact restrictions may be necessary

August 2026 (updated 07/09/26)

-Minor impact restrictions may be necessary depending on flow conditions

-Little to no impact, though minor outages may cause incremental reductions

Station # / Lateral

Est Nominal Operating Capacity

(Thousand Dth)

Week 1

(8/3 - 8/9)

Week 2

(8/10 - 8/16)

Week 3

(8/17 - 8/23)

Week 4

(8/24 - 8/30)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 110

(segment 187 BH)

(south thru Kentucky)

2,685

2281

(404)

2281

(404)

2070

(615)

1882

(803)

MLV 104-1 to MLV 105-1: Anomaly Remediation (8/6/2026 - 9/6/2026)

MLV 109-4 to 110-4: Valve Installation & Crossover Work (7/28/2026 - 8/11/2026)

MLV 109-4 to MLV 110-4: Pipe Replacement (7/28/2026 - 8/11/2026) MLV 109-5 to MLV 109-5A: Pipe Replacement (8/18/2026 - 9/1/2026) MLV 109-5A to MLV 110-5: Pipe Replacement (8/18/2026 - 9/1/2026)

MLV 54-3 to MLV 106-3: Emergent Repair - CAO (2/26/2026 - 12/31/2026) MLV 87-3 to MLV 96-3: Pig Run - Cleaning / Gauge (8/25/2026)

MLV 87-3 to MLV 96-3: Pig Run - EMAT (8/27/2026)

MLV 96-3BR to MLV 96-3BL: Spike Test (7/27/2026 - 8/31/2026)

Sta 106: Unit 1D - 4K Solar Turbine Inspection (8/18/2026 - 8/20/2026) Sta 110: Install ESD Silence Covers (8/24/2026 - 8/28/2026)

Sta 87: Unit 3D - Power side Overhaul (6/22/2026 - 9/30/2026) Sta 875: Unit 1A- 8K Solar Turbine Inspection (8/17/2026 - 8/21/2026)

Sta 96: Unit 2D - Install Ball Grove Valve (8/3/2026 - 8/7/2026)

Station 114

(segment 114 BH)

907

726

(181)

381

(526)

381

(526)

381

(526)

MLV 113-2 to MLV 114-2: Emergent Repair (7/7/2026 - 9/27/2026) MLV 117-3 to MLV 118-3: Special Permit Pipe Replacement (8/10/2026 -

8/30/2026)

MLV 119-2 to MLV 119-2A: Special Permit Pipe Replacement (8/10/2026 - 8/30/2026)

Station 204

(Segment 204 BH)

1,828

1,828

1,828

1,828

1,828

Station 245

(segment 245 FH)

986

970

(16)

970

(16)

970

(16)

970

(16)

Sta 245: Unit 1A & 2A - Exhaust System & HP Fuel (4/27/2026 - 11/1/2026)

Station 261 Discharge East (segment 261 FH)

888

888

888

888

888

Station 307

(segment 307 BH)

1,153

965

(188)

1,153

765

(388)

965

(188)

Sta 219: Annual ESD Test & Scrubber Maintenance (8/17/2026 - 8/21/2026) Sta 307 (Pigeon): Annual ESD Test & Maintenance (8/3/2026 - 8/7/2026) Sta 307 (Pigeon): MLV Operators / Air Comp Install / Fuel Skid (8/24/2026 - 8/28/2026)

Station 313 Discharge (segment 399 FH)

797

797

797

515

(282)

797

Sta 313 Coudersport: Annual ESD Test & Maintenance (8/17/2026 - 8/20/2026)

Station 315

(segment 315 BH)

1,823

1,823

1,823

1,823

1,823

Station 317

(segment 317 BH)

1,548

1,548

1,548

1,548

1345

(203)

Sta 317: Annual ESD Test & Maintenance (8/24/2026 - 8/28/2026)

MLV 324

(segment 324 FH)

1,767

1,767

1,767

1,767

1700

(67)

MLV 324-1 to MLV 324-1A: Anomaly Remediation (8/24/2026 - 8/29/2026)

Station 405 HC Line (segment 299 FH)

794

794

794

794

794

Station 224

(segment 224 FH)

388

388

388

388

280

(108)

Station 224: Scrubber Inspections & Filter Change (8/25/2026 - 8/26/2026)

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.

-Primary impact restrictions may be necessary

TGP - Outage Impact Report

-Major impact restrictions may be necessary

September 2026 (updated 07/09/26)

-Minor impact restrictions may be necessary depending on flow conditions

-Little to no impact, though minor outages may cause incremental reductions

Station # / Lateral

Est Nominal Operating Capacity

(Thousand Dth)

Week 1

(8/31 - 9/6)

Week 2

(9/7 - 9/13)

Week 3

(9/14 - 9/20)

Week 4

(9/21 - 9/27)

Primary Outage(s)

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 409A (Alamo) (segment 492 FH)

274

274

125

(149)

274

274

MLV 409A-101.1 to MLV 409A-103: Pig Runs - Cleaning / Gauge (M) (9/7/2026) MLV 409A-101.1 to MLV 409A-103: Pig Runs - Cleaning / Gauge (M) (9/8/2026) MLV 409A-101.1 to MLV 409A-103: Pig Runs - Cleaning / Gauge (M) (9/9/2026) MLV 409A-101.1 to MLV 409A-103: Pig Runs - EMAT (M) (9/11/2026)

MLV 409A-101.1 to MLV 409A-103: Pig Runs - MFL-C (M) (9/10/2026)

Station 409 (Donna Line) (segment 490 FH)

564

505

(59)

505

(59)

505

(59)

505

(59)

MLV 409-1 to MLV 406-1: Spike Test (9/1/2026 - 10/31/2026)

Station 1

(segment 101 BH)

399

300

(99)

300

(99)

300

(99)

300

(99)

MLV 1-1D to MLV 5-1: Spike Test (M) (9/1/2026 - 11/2/2026)

Station 9

(segment 109 BH)

1,027

1,027

1,027

1,027

1,027

Station 17

(segment 117 FH)

1,122

1100

(22)

1100

(22)

1100

(22)

1085

(37)

MLV 17-1D to MLV 20-1A: Pig Run - CLEANING (9/21/2026) MLV 17-1D to MLV 20-1A: Pig Run - EMAT (9/24/2026)

MLV 17-1D to MLV 20-1A: Pig Run - GAUGE PLATE (9/22/2026) MLV 17-1D to MLV 20-1A: Pig Run - MFL-C (9/23/2026)

MLV 19-1 TO MLV 20-1A: Pipe Replacement (M) (8/6/2026 - 9/15/2026)

Station 25

(segment 125 FH)

1,078

1,078

1,078

1,078

1,078

Station 47

(segment 143 FH)

1,343

1045

(298)

1045

(298)

1,343

1,343

MLV 47-4D to MLV 54-4S: Pig Run - AFD Combo (M) (9/8/2026) MLV 47-4D to MLV 54-4S: Pig Run - EMAT (M) (9/10/2026)

MLV 47-4D to MLV 54-4S: Pig Run - Gauge Cleaning (M) (8/31/2026) MLV 47-4D to MLV 54-4S: Pig Run - Gauge Cleaning (M) (9/1/2026) MLV 47-4D to MLV 54-4S: Pig Run - Gauge Cleaning (M) (9/2/2026)

Station 63

(segment 163 FH)

1,242

1117

(125)

1117

(125)

1117

(125)

1117

(125)

MLV 54-3 to MLV 106-3: Emergent Repair - CAO (2/26/2026 - 12/31/2026)

Station 823

(segment 823 BH)

734

734

734

734

734

Station 834

(segment 834 BH)

683

683

670

(13)

670

(13)

670

(13)

Sta 834: Unit 1A - Replace Insulation Blanket (9/14/2026 - 9/15/2026) Sta 834: Unit 2A - Replace Insulation Blanket (9/16/2026 - 9/17/2026) Sta 834: Unit 3A - Replace Insulation Blanket (9/18/2026 - 9/19/2026) Sta 834: Unit 4A - Replace Insulation Blanket (9/21/2026 - 9/22/2026)

Sta 834: Unit 4A - Replace Lubrication System (9/7/2026 - 9/11/2026)

Station 534 South of Pool (segment 530 BH)

1,550

985

(565)

1528

(22)

1528

(22)

1528

(22)

MLV 533-2 to MLV 534-2: Pipe Replacement (M) (6/4/2026 - 9/4/2026) Sta 530: Unit 1A - Bearings (8/25/2025 - 12/31/2026)

Sta 530: Unit 3A - Crankshaft Replacement (6/9/2025 - 12/31/2026) Sta 530: Unit 5A - Top-End Overhaul (6/9/2025 - 12/31/2026)

MLV 548

(segment 542 BH)

1,647

1635

(12)

1640

(7)

1640

(7)

1640

(7)

Sta 542: Unit 2A - Emergent Repair (4/7/2026 - 9/30/2026) Sta 542: Unit 3A - Emergent Repair (3/26/2026 - 8/31/2026)

Station 860

(segment 548 BH)

1,593

1580

(13)

786

(807)

1430

(163)

1,593

MLV 546-2 to MLV 547-2: Line Recoat (9/8/2026 - 9/10/2026)

Sta 546: Annual ESD Tests & Maintenance (9/7/2026 - 9/11/2026)

Sta 555: Scrubber/Filter/Separator Clean, Inspect & Filter Change (9/14/2026) Sta 555: Unit 4A - Engine Maintenance (8/31/2026 - 9/5/2026)

Station 860 North (Segment 860 BH)

1,874

1846

(28)

1846

(28)

1530

(344)

1846

(28)

Sta 563: Unit 1A - Annual Inspection & Safety Device Check (9/14/2026 - 9/16/2026)

Sta 563: Unit 2A - Annual Inspection/CAV (9/16/2026 - 9/18/2026)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2025 - 12/31/2026) Sta 860: Unit 1B - Replace Turbocharger (8/31/2026 - 9/4/2026)

-Primary impact restrictions may be necessary