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TGP Outage Impact Report

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TSP/TSP Name:  1939164-TENNESSEE GAS PIPELINE Critical: Y
Notice Type Desc (1):  MAINTENANCE Notice Type Desc (2):  MAINTENANCE
Notice Eff Date/Time:  06/26/2025 3:16:39PM Notice End Date/Time:  06/27/2025 9:00:00am
Post Date/Time:  6/26/2025 3:16:39 PM Notice ID: 395020
Reqrd Rsp:  1 Rsp Date:  06/26/2025
Notice Stat Desc:  INITIATE Prior Notice: 
Subject:  TGP Outage Impact Report
Notice Text:

TGP - Outage Impact Report Seven Day Forecast (updated 06/26/25)

-Primary impact restrictions may be necessary

-Major impact restrictions may be necessary

-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

(6/30)

Tuesday

(7/1)

Wednesday

(7/2)

Thursday

(7/3)

Friday

(7/4)

Saturday

(7/5)

Sunday

(7/6)

 

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

 

MLV 406

(segment 406 BH)

 

456

416

(40)

416

(40)

416

(40)

416

(40)

416

(40)

416

(40)

416

(40)

MLV 408-1 to MLV 409-1: Immediate Anomaly Remediation (6/17/2025 -

7/11/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

875

(153)

875

(153)

875

(153)

 

1,028

 

1,028

 

1,028

 

1,028

MLV 8-1 to MLV 9-1: Anomaly Remediation (6/5/2025 - 7/2/2025)

Station 17

(segment 117 FH)

 

758

438

(320)

438

(320)

438

(320)

438

(320)

753

(5)

753

(5)

753

(5)

MLV 17-2D to MLV 20-2A: Anomaly Remediation (6/25/2025 - 7/3/2025) MLV 19-3 to MLV 19-3A: Class Change Pipe Replacement (M) (6/24/2025 -

7/17/2025)

Station 25

(segment 125 FH)

 

714

 

714

 

714

 

714

 

714

 

714

 

714

 

714

 

Station 40 South

(segment 132 FH)

 

912

 

797

(115)

 

797

(115)

 

797

(115)

 

797

(115)

 

797

(115)

 

797

(115)

 

797

(115)

MLV 32-1L to MLV 33-1: PHMSA Immediate Anomaly Remediation (6/23/2025 - 8/15/2025)

MLV 34-2 to MLV 35-2: Anomaly Remediation (5/20/2025 - 7/11/2025)

Sta 32: Unit 3B - Compressor Overhaul (4/14/2025 - 7/15/2025)

Carthage Lateral (segment 700

FH)

 

323

 

323

258

(65)

 

323

 

323

 

323

 

323

 

323

Sta 703 Mansfield: Annual ESD, Maintenance (7/1/2025)

Station 40 KN South (segment 501

FH)

 

268

 

200

(68)

 

200

(68)

 

200

(68)

 

200

(68)

 

200

(68)

 

200

(68)

 

200

(68)

Sta. 500C1 Natchitoches: Emergent Repair - Turbine Vibration (6/20/2025 - TBD)

Station 40 North

(segment 140 FH)

 

1,175

950

(225)

950

(225)

950

(225)

 

1,175

 

1,175

 

1,175

 

1,175

Sta 40: HP Replacement - Bldg C Mod (6/25/2025 - 6/30/2025)

Sta 40: Unit 1C - Gasket Inspection / Replacement (6/30/2025 - 7/2/2025)

 

Station 47

(segment 143 FH)

 

 

1,176

 

 

1171

(5)

 

 

1116

(60)

 

 

1116

(60)

 

 

1116

(60)

 

 

1171

(5)

 

 

1171

(5)

 

 

1171

(5)

MLV 41-2 to MLV 42-2: Anomaly Remediation (5/21/2025 - 7/2/2025) MLV 47-1AT to MLV 49-1: Anomaly Remediation (1/6/2025 - 10/31/2025) MLV 49-1 to MLV 50-1: Anomaly Remediation (3/4/2025 - 10/31/2025) MLV 60-3 to MLV 59-3: Shallow Pipe Lowering (6/24/2025 - 7/9/2025) Sta 47: Unit 2D - 16K inspection & turbochargers (6/9/2025 - 7/25/2025)

Sta 63: Unit 2D - Safety Device Checks (7/1/2025 - 7/3/2025)

Station 63

(segment 163 FH)

 

1,233

1105

(128)

1105

(128)

1105

(128)

1105

(128)

 

1,233

 

1,233

 

1,233

MLV 82-3C to MLV 83-3: Anomaly Remediation (6/28/2025 - 7/3/2025)

Station 823

(segment 823 BH)

 

686

 

686

 

686

 

686

 

686

 

686

 

686

 

686

 

Station 834

(segment 834 BH)

 

679

670

(9)

670

(9)

670

(9)

670

(9)

670

(9)

670

(9)

670

(9)

Sta 834: Unit 6A - Overhaul (3/3/2025 - 11/3/2025)

Station 534 South of Pool (segment 530 BH)

 

 

1,820

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

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

MLV 548

(segment 542 BH)

 

1,597

1480

(117)

1480

(117)

1480

(117)

1480

(117)

1480

(117)

1480

(117)

1480

(117)

Sta 534: Unit 6A - Piston Liner & Unloader Replacements (3/25/2025 - 8/15/2025)

Sta 542: Unit 3A - Overhaul (2/12/2024 - 7/20/2025)

Station 860

(segment 548 BH)

 

1,516

 

1162

(354)

 

1500

(16)

 

1500

(16)

 

1500

(16)

 

1500

(16)

 

1500

(16)

 

1500

(16)

MLV 556-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) MLV 557-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) MLV 558-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025)

Sta 550: Unit 4A - Turbocharger Exchange (6/2/2025 - 8/1/2025)

 

 

 

 

Station 860 North (Segment 860 BH)

 

 

 

 

 

 

1,793

 

 

 

 

 

 

1439

(354)

 

 

 

 

 

 

1340

(450)

 

 

 

 

 

 

1340

(450)

 

 

 

 

 

 

1340

(450)

 

 

 

 

 

 

1655

(138)

 

 

 

 

 

 

1655

(138)

 

 

 

 

 

 

1655

(138)

MLV 560-2 to MLV 561-2: Class Change Pipe Replacement (6/9/2025 - 8/4/2025)

MLV 561-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) MLV 562-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) MLV 563-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) MLV 564-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) St. 563: Unit 2A - Fuel Nozzle Cleaning (6/9/2025 - 7/3/2025)

Sta 860: Force Majeure (8/18/2023 - TBD)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2024 - 12/31/2025)

Sta 860: Unit 1B - Replace Lubrication System & Electronic Bearing System (6/23/2025 - 7/3/2025)

Sta 860: Unit 6A - Electronic Bearing System (6/30/2025 - 7/3/2025)

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

2,645

 

 

2565

(80)

 

 

2565

(80)

 

 

2565

(80)

 

 

2565

(80)

 

 

2565

(80)

 

 

2565

(80)

 

 

2565

(80)

MLV 107-3 to MLV 108-3: Anomaly Remediation (6/2/2025 - 7/20/2025) MLV 108-3 to MLV 109-3: Anomaly Remediation (6/23/2025 - 7/20/2025) MLV 109-3 to MLV 109-3A: Anomaly Remediation (6/23/2025 - 7/20/2025)

Sta 106: Unit 1C - Replace Power Cylinder Bearing #7 (4/14/2025 - 7/31/2025) Sta 106: Unit 6B - Engine Inspection (6/23/2025 - 7/3/2025)

Sta 87: Unit 3D - Turbocharger Exchange (4/28/2025 - 7/3/2025)

Station 114

(segment 114 BH)

 

920

 

920

 

920

 

920

 

920

 

920

 

920

 

920

 

Station 200

(segment 200 BH)

 

1,765

1750

(15)

1750

(15)

1750

(15)

1750

(15)

1750

(15)

1750

(15)

1750

(15)

MLV 111-3 to 111-3A: Immediate Anomaly Remediation (6/18/2025 - 7/7/2025)

 

 

 

 

Station 204

(Segment 204 BH)

 

 

 

 

 

1,827

 

 

 

 

1621

(206)

 

 

 

 

1701

(126)

 

 

 

 

1681

(146)

 

 

 

 

1736

(91)

 

 

 

 

1797

(30)

 

 

 

 

1797

(30)

 

 

 

 

1797

(30)

MLV 205-2 to MLV 206-2: Special Permit Replacement (7/1/2025 - 9/1/2025) MLV 209-2 to MLV 204-2: Pig Runs - Cleaning / Gauge 6/30/25 (6/30/2025) MLV 209-2 to MLV 204-2: Pig Runs - MFL-A 7/2/25 (7/2/2025)

MLV 209-3 to MLV 210-3A: Class Change Replacement (5/27/2025 - 6/30/2025)

MLV 216-2 to MLV 216-2A: Class Change Replacement (7/1/2025 - 9/1/2025) Sta 200: Unit 6A - Engine Inspection (6/30/2025 - 7/3/2025)

Sta 204: Unit 12A - Compressor Inspection (6/20/2025 - 7/2/2025) Sta 209: Unit 12A - Install Barring Jack (6/30/2025 - 7/2/2025)


 

 

 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

 

TGP - Outage Impact Report

 

 

 

-Major impact restrictions may be necessary

 

 

Seven Day Forecast (updated 06/26/25)

 

 

-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

(6/30)

Tuesday

(7/1)

Wednesday

(7/2)

Thursday

(7/3)

Friday

(7/4)

Saturday

(7/5)

Sunday

(7/6)

 

Primary Outage(s) that may Impact Throughput

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 245

(segment 245 FH)

 

997

975

(22)

975

(22)

975

(22)

975

(22)

975

(22)

975

(22)

975

(22)

Sta 241: Unit 1A - Main Bearing, Turbo, Compressor Boring & Valve Operator

(5/19/2025 - 7/11/2025)

Station 254

(segment 256 FH)

 

1,213

1195

(18)

1195

(18)

1195

(18)

1195

(18)

 

1,213

 

1,213

 

1,213

Sta 254: Unit 4A - Replace Power Cylinder Head (5/16/2025 - 7/3/2025)

Station 261 Discharge East (segment 261

FH)

 

941

 

941

 

941

 

941

 

941

 

941

 

941

 

941

 

Station 267 South (segment 266

FH)

 

469

 

395

(74)

 

395

(74)

 

395

(74)

 

395

(74)

 

469

 

469

 

469

MLV 272-2 to MLV 273-2: PHMSA Emergent Anomaly Remediation (6/18/2025

- 7/3/2025)

Tewksbury Incremental Lateral (segment 285

FH)

 

 

34

 

17

(17)

 

 

34

 

 

34

 

 

34

 

 

34

 

 

34

 

 

34

MLV 270B-101.1 TO MLV 270B-103: Pig Runs - MFL-C / Cal / IMU Combo 6/30/25 (M) (6/30/2025)

Station 307

(segment 307 BH)

 

1,148

 

1130

(18)

 

1065

(83)

 

1065

(83)

 

1065

(83)

 

1,148

 

1,148

 

1,148

Sta 219: Unit 10A - Install New Foundation Chocks (5/5/2025 - 7/3/2025) Sta 219: Unit 11A - Install New Foundation Chocks (5/5/2025 - 7/3/2025) Sta 307: Unit 5A - Cooling System (7/1/2025)

Sta 307: Unit 5A - Ignition Testing (7/2/2025 - 7/3/2025)

Station 315

(segment 315 BH)

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

Station 317

(segment 317 BH)

 

1,579

 

1,579

 

1,579

1375

(204)

 

1,579

 

1,579

 

1,579

 

1,579

STA 317: Upgrade Communications UPS System (7/2/2025)

MLV 324

(segment 324 FH)

 

1,767

1410

(357)

1410

(357)

 

1,767

 

1,767

 

1,767

 

1,767

 

1,767

Sta 327: Unit 1A - Solar Inspection (6/23/2025 - 7/1/2025)

Station 261

South 300 Line

(segment 355 BH)

 

47

 

0

(47)

 

0

(47)

 

0

(47)

 

0

(47)

 

47

 

47

 

47

MLV 346-1: MLV Replacement (M) (6/25/2025 - 7/3/2025)

Station 405

HC Line (segment 299 FH)

 

803

 

803

 

803

 

803

 

803

 

803

 

803

 

803

 

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 2025 (updated 06/26/25)

 

 

-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

(6/30 - 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

Station 409 (Donna Line) (segment 490

FH)

 

564

 

 

564

 

564

 

564

 

564

 

MLV 406

(segment 406 BH)

 

456

 

 

416

(40)

 

396

(60)

 

396

(60)

 

396

(60)

MLV 407-1 TO MLV 408-1: Immediate Anomaly Remediation (7/14/2025 - 8/2/2025)

MLV 408-1 to MLV 409-1: Immediate Anomaly Remediation (6/17/2025 -

7/11/2025)

Station 1

(segment 101 BH)

 

400

 

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

 

 

1,028

 

1,028

702

(326)

702

(326)

MLV 8-3 to MLV 9-3: Anomaly Remediation (7/21/2025 - 8/8/2025)

Station 17

(segment 117 FH)

 

758

 

 

753

(5)

 

753

(5)

 

753

(5)

 

753

(5)

MLV 19-3 to MLV 19-3A: Class Change Pipe Replacement (M) (6/24/2025 - 7/17/2025)

MLV 20-1 to MLV 20-1BR: Class Change Pipe Replacement (7/22/2025 -

8/7/2025)

Station 25

(segment 125 FH)

 

714

 

 

714

 

714

 

714

564

(150)

MLV 25-3 to MLV 32-3: Pig Run - Maintenance (7/31/2025)

Station 40 South

(segment 132 FH)

 

912

 

 

797

(115)

 

892

(20)

 

892

(20)

 

892

(20)

MLV 32-1L to MLV 33-1: PHMSA Immediate Anomaly Remediation (6/23/2025 - 8/15/2025)

MLV 34-2 to MLV 35-2: Anomaly Remediation (5/20/2025 - 7/11/2025)

Sta 32: Unit 3B - Compressor Overhaul (4/14/2025 - 7/15/2025)

Carthage Lateral (segment 700

FH)

 

323

 

 

323

 

323

175

(148)

 

323

Sta 40: Carthage Check Meter (M) (7/21/2025 - 7/24/2025)

Station 40 KN South (segment 501 FH)

 

 

268

 

 

200

(68)

 

225

(43)

 

 

268

 

150

(118)

Sta 500-1 to Sta 823 (MLV 507-1): Pig Run - Maintenance (M) (7/30/2025) Sta 504 Pitkin: Annual ESD test (7/14/2025 - 7/18/2025)

Sta 504: Separator Filters (7/14/2025)

Sta. 500C1 Natchitoches: Emergent Repair - Turbine Vibration (6/20/2025 - TBD)

 

 

 

 

 

 

 

 

 

Station 47

(segment 143 FH)

 

 

 

 

 

 

 

 

 

 

1,176

 

 

 

 

 

 

 

 

 

 

871

(305)

 

 

 

 

 

 

 

 

 

1011

(165)

 

 

 

 

 

 

 

 

 

1031

(145)

 

 

 

 

 

 

 

 

 

1031

(145)

MLV 40-3 to MLV 47-3: Pig Run - EMAT 7/9/25 (M) (7/9/2025)

MLV 47-1AT to MLV 49-1: Anomaly Remediation (1/6/2025 - 10/31/2025) MLV 47-2A to MLV 48-2: Anomaly Remediation (M) (7/21/2025 - 7/30/2025) MLV 49-1 to MLV 50-1: Anomaly Remediation (3/4/2025 - 10/31/2025) MLV 53-2 TO MLV 53-2CBR: Anomaly Remediation (7/30/2025 - 8/8/2025) MLV 54-4D TO MLV 63-4S: Pig Runs - Caliper 7/24/25 (7/24/2025)

MLV 54-4D TO MLV 63-4S: Pig Runs - Cleaning / Gauge 7/22/25 (7/22/2025) MLV 54-4D TO MLV 63-4S: Pig Runs - EMAT 7/31/25 (7/31/2025)

MLV 54-4D TO MLV 63-4S: Pig Runs - MFL-C 7/29/25 (7/29/2025)

MLV 59-3 to MLV 58-3: Shallow Pipe Lowering (7/10/2025 - 7/19/2025) MLV 60-3 to MLV 59-3: Shallow Pipe Lowering (6/24/2025 - 7/9/2025) Sta 47: B Building - Clean Motor Control Center (7/7/2025 - 7/11/2025) Sta 47: C Building - Clean Motor Control Center (7/7/2025 - 7/11/2025) Sta 47: D Building - Clean Motor Control Center (7/7/2025 - 7/11/2025) Sta 47: E Building - Clean Motor Control Center (7/7/2025 - 7/11/2025)

Sta 47: Scrubber Filter Separator Cleaning & Inspection (7/14/2025 - 7/18/2025) Sta 47: Transformer Inspection (7/7/2025 - 7/11/2025)

Sta 47: Unit 2D - 16K inspection & turbochargers (6/9/2025 - 7/25/2025)

 

Station 63

(segment 163 FH)

 

 

1,233

 

 

 

1,233

 

 

1170

(63)

 

 

1,233

 

 

1085

(148)

MLV 71-1D to MLV 77-1A: Pig Runs - Cleaning / Gauge 7/15/25 (7/15/2025) MLV 71-1D to MLV 77-1A: Pig Runs - MDS 7/17/25 (7/17/2025)

MLV 82-2C to MLV 87-2S: Pig Runs - Cleaning / Gauge 7/29/25 (7/29/2025) MLV 82-2C to MLV 87-2S: Pig Runs - MDS 7/31/25 (7/31/2025)

Station 823

(segment 823 BH)

 

686

 

 

686

 

686

 

686

 

686

 

Station 834

(segment 834 BH)

 

679

 

670

(9)

670

(9)

670

(9)

670

(9)

Sta 834: Unit 6A - Overhaul (3/3/2025 - 11/3/2025)

Station 534 South of Pool (segment 530

BH)

 

1,820

 

 

1560

(260)

 

1798

(22)

 

1798

(22)

 

1798

(22)

Sta 530: Scrubber Inspection / Filter Replacement (7/7/2025 - 7/11/2025) Sta 530: Unit 3A - Crankshaft Replacement (6/9/2025 - 12/31/2025)

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

Sta 530 Bay ST. Louis: Annual ESD Test (7/7/2025 - 7/11/2025)

 

MLV 548

(segment 542 BH)

 

 

1,597

 

 

1480

(117)

 

1480

(117)

 

1575

(22)

 

1575

(22)

Sta 534: Unit 6A - Piston Liner & Unloader Replacements (3/25/2025 - 8/15/2025)

Sta 542: Unit 3A - Overhaul (2/12/2024 - 7/20/2025)

Sta 546: Unit 4A - Engine and Compressor Overhaul (7/28/2025 - 8/22/2025)

Station 860

(segment 548 BH)

 

1,516

 

1450

(66)

1450

(66)

1450

(66)

1450

(66)

Sta 550: Unit 3A - Engine Overhaul (7/7/2025 - 8/8/2025)

Sta 550: Unit 4A - Turbocharger Exchange (6/2/2025 - 8/1/2025) Sta 555: Unit 1A - Engine Maintenance (7/7/2025 - 7/17/2025)


 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

TGP - Outage Impact Report

 

 

-Major impact restrictions may be necessary

 

 

July 2025 (updated 06/26/25)

 

 

-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

(6/30 - 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

Station 860 North (Segment 860 BH)

 

 

1,793

 

 

1655

(138)

 

1655

(138)

 

1655

(138)

 

1655

(138)

MLV 560-2 to MLV 561-2: Class Change Pipe Replacement (6/9/2025 -

8/4/2025)

Sta 860: Force Majeure (8/18/2023 - TBD)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2024 - 12/31/2025)

 

 

 

 

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

 

 

 

2565

(80)

 

 

 

 

 

 

 

 

2370

(275)

 

 

 

 

 

 

 

 

2370

(275)

 

 

 

 

 

 

 

 

2290

(355)

MLV 101-5 to MLV 102-5: Class Change Pipe Replacement (7/14/2025 - 8/16/2025)

MLV 107-3 to MLV 108-3: Anomaly Remediation (6/2/2025 - 7/20/2025) MLV 108-3 to MLV 109-3: Anomaly Remediation (6/23/2025 - 7/20/2025) MLV 109-3 to MLV 109-3A: Anomaly Remediation (6/23/2025 - 7/20/2025) MLV 870-1 to MLV 870-1R: Anomaly Remediation (7/26/2025 - 8/9/2025) MLV 871-2 to MLV 871-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 871-2A to MLV 872-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 872-1 to MLV 873-1: Anomaly Remediation (7/14/2025 - 7/25/2025) MLV 872-2 to MLV 873-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 875-1 to MLV 876-1R: Anomaly Remediation (7/14/2025 - 7/25/2025) MLV 93-3 to MLV 94-3: HDD River Crossing Replacement (7/18/2025 - 8/27/2025)

Sta 106: Unit 1C - Replace Power Cylinder Bearing #7 (4/14/2025 - 7/31/2025) Sta 87: Unit 1E - Anchor Bolt Repairs (7/8/2025 - 7/14/2025)

Sta 87: Unit 2E - Anchor Bolt Repairs (7/14/2025 - 7/21/2025)

Station 114

(segment 114 BH)

 

920

 

 

920

800

(120)

 

920

 

920

Sta 114: Unit 1D - Turbine Swap (7/14/2025 - 7/19/2025)

Station 200

(segment 200 BH)

 

1,765

 

1750

(15)

1750

(15)

1750

(15)

 

1,765

MLV 110-3 to MLV 111-3A: Anomaly Remediation (7/14/2025 - 7/26/2025) MLV 111-3 to 111-3A: Immediate Anomaly Remediation (6/18/2025 - 7/7/2025)

 

 

 

Station 204

(Segment 204 BH)

 

 

 

 

1,827

 

 

 

 

1701

(126)

 

 

 

1502

(325)

 

 

 

1797

(30)

 

 

 

1797

(30)

MLV 205-2 to MLV 206-2: Special Permit Replacement (7/1/2025 - 9/1/2025) MLV 216-2 to MLV 216-2A: Class Change Replacement (7/1/2025 - 9/1/2025) Sta 200 Greenup: Annual ESD Test (7/14/2025 - 7/18/2025)

Sta 200: Unit 11A - Engine Inspection (7/7/2025 - 7/10/2025) Sta 204: Unit 1A - Change Bearing Fuses (7/7/2025 - 7/10/2025) Sta 209: Unit 10A - C2 Pressure Packing (7/7/2025 - 7/10/2025) Sta 214: Annual ESD Test & Maintenance (7/14/2025 - 7/18/2025)

Station 219 to

Station 224

(Segment 219 FH)

 

540

 

 

540

 

445

(95)

 

540

 

540

Sta 219: Unit 1A to 6A - Protective Device Checks (7/14/2025 - 7/18/2025)

Station 230C (segment 296

FH)

 

743

 

 

743

570

(173)

 

743

 

743

Station 230C: Annual ESD (M) (7/16/2025 - 7/17/2025)

 

 

 

Station 245

(segment 245 FH)

 

 

 

 

997

 

 

 

 

925

(72)

 

 

 

925

(72)

 

 

 

925

(72)

 

 

 

815

(182)

MLV 237-2 to MLV 238-2: SCCDA (7/28/2025 - 8/9/2025)

MLV 240-1A to MLV 241-1: Anomaly Remediation (7/7/2025 - 7/12/2025) MLV 241-1 to MLV 242-1: Anomaly Remediation (7/7/2025 - 7/12/2025) MLV 242-1 to MLV 243-1: Anomaly Remediation (7/14/2025 - 7/19/2025) MLV 244-1 to MLV 245-1S: Anomaly Remediation (7/14/2025 - 7/26/2025)

Sta 241: Unit 1A - Main Bearing, Turbo, Compressor Boring & Valve Operator (5/19/2025 - 7/11/2025)

Sta 241: Unit 3A - Device and Relief Valve Tests (7/15/2025 - 7/16/2025)

Sta 249: Unit 2A - Engine Maintenance (7/14/2025 - 7/23/2025)

Station 254

(segment 256 FH)

 

1,213

 

 

945

(268)

 

945

(268)

 

920

(293)

 

920

(293)

MLV 259-1 to MLV 260-1: Anomaly Remediation - Dig 2023-18 (Cutout) (7/8/2025 - 7/19/2025)

Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/8/2025 - 11/1/2025)

Station 261 Discharge East (segment 261

FH)

 

941

 

 

941

 

941

 

941

 

941

 

MLV 265

(segment 265 FH)

 

767

 

 

767

390

(377)

390

(377)

390

(377)

MLV 264-2 to 264-2A: Pipe Replacement (7/15/2025 - 7/30/2025)

Station 266A (segment 282 FH)

 

371

 

 

371

 

371

 

345

(26)

 

371

MLV 266A-102A TO MLV 266A-104A: Pig Runs - Cleaning / Gauge 7/22/25 (M) (7/22/2025)

MLV 266A-102A TO MLV 266A-104A: Pig Runs - MFL-A / Cal / IMU Combo

7/23/25 (M) (7/23/2025)

Fitchburg Lat to Gloucester (segment 268

FH)

 

202

 

 

202

 

140

(62)

 

140

(62)

 

202

MLV 267-1A to MLV 268-1: Anomaly Remediation (7/14/2025 - 7/19/2025) MLV 270-1A to MLV 270-101.1R: Anomaly Remediation (7/21/2025 - 7/26/2025)

 

Station 307

(segment 307 BH)

 

 

1,148

 

 

 

1,148

 

1133

(15)

 

1105

(43)

 

1105

(43)

Sta 219: Unit 7A to 13A - Protective Device Checks (7/14/2025 - 7/18/2025) Sta 307: Unit 1A - Protective Device Checks (7/21/2025 - 7/22/2025) Sta 307: Unit 2A - Protective Device Checks (7/23/2025 - 7/25/2025) Sta 307: Unit 3A - Protective Device Checks (7/28/2025 - 7/29/2025)

Sta 307: Unit 4A - Protective Device Checks (7/30/2025 - 8/1/2025)

Station 315

(segment 315 BH)

 

1,854

 

 

1,854

 

1,854

 

1,854

 

1,854

 


 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

TGP - Outage Impact Report

 

 

-Major impact restrictions may be necessary

 

 

July 2025 (updated 06/26/25)

 

 

-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

(6/30 - 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

 

Station 317

(segment 317 BH)

 

 

1,579

 

 

1555

(24)

 

1550

(29)

 

 

1,579

 

 

1,579

MLV 317-1 to MLV 318-1: Hot Tap for New Meter (Meter: Port Royal PIN: 57162)

(M) (7/14/2025 - 7/15/2025)

MLV 317-2 to MLV 318-2: Hot Tap for New Meter (Meter: Port Royal PIN: 57162)

(M) (7/16/2025 - 7/17/2025)

Sta 317: Unit 1B - Engine Maintenace (7/8/2025 - 7/11/2025)

Station 321

(segment 321 FH)

 

2,102

 

 

2,102

 

2,102

 

2,102

1965

(137)

MLV 324-1B to MLV 325-1: Anomaly Remediation (M) (7/28/2025 - 8/7/2025)

MLV 324

(segment 324 FH)

 

1,767

 

 

1,767

 

1,767

1200

(567)

 

1,767

MLV 327-2B to MLV 328-2: Anomaly Remediation (7/21/2025 - 7/26/2025)

Station 405 HC Line (segment 299

FH)

 

803

 

 

690

(113)

 

803

 

803

 

803

Sta 405A: Annual ESD Test (7/8/2025) Sta 405A: Filter / Scrubber Change (7/9/2025)

Sta 405A: Point to Point and Trans Cals (7/9/2025)

Sta 405A: Unit Protective Device Tests (7/9/2025)

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.


 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

August 2025 (updated 06/26/25)

 

-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

(8/4 - 8/10)

Week 2

(8/11 - 8/17)

Week 3

(8/18 - 8/24)

Week 4

(8/25 - 8/31)

 

Primary Outage(s)

 

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 409 (Donna Line) (segment 490

FH)

 

564

 

564

 

564

 

564

 

564

 

MLV 406

(segment 406 BH)

 

456

 

396

(60)

 

396

(60)

 

396

(60)

 

406

(50)

MLV 405-1 to MLV 406-1: Immediate Anomaly Remediation (8/25/2025 - 9/13/2025)

MLV 406-1 to MLV 407-1: Immediate Anomaly Remediation (8/4/2025 -

8/23/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

702

(326)

 

1,028

 

1,028

445

(583)

MLV 17-2S to MLV 9-2D: Pigging Cleaning Run 1 (M) (8/28/2025) MLV 8-3 to MLV 9-3: Anomaly Remediation (7/21/2025 - 8/8/2025)

Station 17

(segment 117 FH)

 

758

 

753

(5)

 

740

(18)

 

740

(18)

 

758

MLV 20-1 to MLV 20-1BR: Class Change Pipe Replacement (7/22/2025 - 8/7/2025)

MLV 21-1 to MLV 22-1: Meter Upgrade (Meter: Tomball PIN: 420898) (M)

(8/11/2025 - 8/22/2025)

Station 25

(segment 125 FH)

 

714

 

714

 

714

709

(5)

709

(5)

MLV 25-1 to MLV 26-1 Relocation: Highway 105 Widening (8/18/2025 - 9/6/2025)

Station 40 South

(segment 132 FH)

 

912

 

882

(30)

 

882

(30)

 

912

 

912

MLV 32-1L to MLV 33-1: PHMSA Immediate Anomaly Remediation (6/23/2025 - 8/15/2025)

MLV 35-1 to MLV 36-1: PHMSA Immediate Anomaly Remediation (8/4/2025 -

8/15/2025)

Station 40 KN South (segment 501

FH)

 

268

 

200

(68)

 

268

 

200

(68)

 

200

(68)

Sta 40: HP Replacement - 500C1 Mod (8/4/2025 - 8/9/2025)

Sta 40: HP Replacement - 500C1 Mod & 1C KN Line (8/22/2025 - 8/30/2025)

Station 40 North

(segment 140 FH)

 

1,176

 

1,176

951

(225)

951

(225)

1006

(170)

Sta 40: HP Replacement - 500C1 Mod & 1C 100 Line (8/22/2025 - 8/30/2025) Sta 40: HP Replacement - Bldg C Mod (8/13/2025 - 8/18/2025)

 

 

Station 47

(segment 143 FH)

 

 

 

1,177

 

 

852

(325)

 

 

1172

(5)

 

 

1172

(5)

 

 

972

(205)

MLV 47-1AT to MLV 49-1: Anomaly Remediation (1/6/2025 - 10/31/2025) MLV 49-1 to MLV 50-1: Anomaly Remediation (3/4/2025 - 10/31/2025) MLV 51-3 to MLV 52-3: Anomaly Remediation (8/25/2025 - 8/29/2025) MLV 52-2 to MLV 53-2: Anomaly Remediation (8/11/2025 - 8/29/2025) MLV 53-2 TO MLV 53-2CBR: Anomaly Remediation (7/30/2025 - 8/8/2025) MLV 53-3 to MLV 53-3CR: Anomaly Remediation (8/25/2025 - 8/29/2025)

Sta 54: Substation Inspection (8/4/2025 - 8/8/2025)

Station 63

(segment 163 FH)

 

1,233

 

1,233

 

1,233

 

1,233

660

(573)

MLV 84-3 to MLV 85-3: Anomaly Remediation (8/25/2025 - 9/26/2025) Sta 63 Batesville: Annual ESD Test (8/27/2025)

Station 823

(segment 823 BH)

 

686

 

686

 

686

 

686

 

686

 

Station 834

(segment 834 BH)

 

679

670

(9)

670

(9)

670

(9)

670

(9)

Sta 834: Unit 6A - Overhaul (3/3/2025 - 11/3/2025)

Station 847

(segment 847 BH)

 

284

 

284

 

284

 

284

220

(64)

Sta 847 Coffeeville: Annual ESD Test (8/27/2025 - 8/28/2025)

Station 534 South of Pool (segment 530

BH)

 

1,820

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

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

 

 

 

 

MLV 548

(segment 542 BH)

 

 

 

 

 

1,597

 

 

 

 

1330

(267)

 

 

 

 

1475

(122)

 

 

 

 

1255

(342)

 

 

 

 

1255

(342)

MLV 540-1 to MLV 540-1A: Anomaly Remediation (8/19/2025 - 8/28/2025) MLV 541-1 to MLV 541-1A: Anomaly Remediation (8/19/2025 - 9/7/2025) Sta 534: Scrubber Inspection / Filter Replacement (8/4/2025 - 8/8/2025) Sta 534: Unit 6A - Piston Liner & Unloader Replacements (3/25/2025 - 8/15/2025)

Sta 546: Annual ESD Tests, Scrubber filter Inspections, Changing Unit Valves (8/4/2025 - 8/10/2025)

Sta 546: Unit 1A - Engine and Compressor Overhaul (8/11/2025 - 9/15/2025) Sta 546: Unit 4A - Engine and Compressor Overhaul (7/28/2025 - 8/22/2025)

Station 860

(segment 548 BH)

 

1,516

 

1511

(5)

 

1,516

 

920

(596)

 

1500

(16)

MLV 550-2 TO MLV 546-2: Pig Runs - Cleaning 8/19/25 (8/19/2025) MLV 550-2 TO MLV 546-2: Pig Runs - EMAT 8/21/25 (8/21/2025)

Sta 550: Unit 2A - Compressor Overhaul (8/25/2025 - 10/17/2025)

Sta 550: Unit 3A - Engine Overhaul (7/7/2025 - 8/8/2025)


 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

August 2025 (updated 06/26/25)

 

-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

(8/4 - 8/10)

Week 2

(8/11 - 8/17)

Week 3

(8/18 - 8/24)

Week 4

(8/25 - 8/31)

 

Primary Outage(s)

 

Est. Operational Capacity (Operational Impact) - Thousand Dth

 

Station 860 North (Segment 860 BH)

 

 

 

1,793

 

 

1655

(138)

 

 

1693

(100)

 

 

1693

(100)

 

 

1693

(100)

MLV 560-2 to MLV 561-2: Class Change Pipe Replacement (6/9/2025 -

8/4/2025)

MLV 861-1 to MLV 862-1: Install New 30" Valve 861-1A (8/18/2025 - 8/30/2025)

Sta 860: Force Majeure (8/18/2023 - TBD)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2024 - 12/31/2025)

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

2,645

 

 

 

 

2290

(355)

 

 

 

 

2300

(345)

 

 

 

 

2445

(200)

 

 

 

 

2445

(200)

MLV 101-5 to MLV 102-5: Class Change Pipe Replacement (7/14/2025 - 8/16/2025)

MLV 870-1 to MLV 870-1R: Anomaly Remediation (7/26/2025 - 8/9/2025) MLV 871-2 to MLV 871-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 871-2A to MLV 872-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 872-2 to MLV 873-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 93-3 to MLV 94-3: HDD River Crossing Replacement (7/18/2025 - 8/27/2025)

Sta 106 Clay City: Upgrade B Building Jacket Water System (8/4/2025 -

8/8/2025)

Station 114

(segment 114 BH)

 

920

 

920

 

920

 

920

780

(140)

Sta 119A Tyler Mountain: Unit 1A - 4k Hr Inspection (8/25/2025 - 8/27/2025)

Station 200

(segment 200 BH)

 

1,765

1760

(5)

1760

(5)

1760

(5)

1760

(5)

MLV 111-3B to MLV 112-3: Make Piggable (8/4/2025 - 8/25/2025)

 

 

 

 

 

 

 

 

Station 204

(Segment 204 BH)

 

 

 

 

 

 

 

 

 

1,827

 

 

 

 

 

 

 

 

1665

(162)

 

 

 

 

 

 

 

 

1731

(96)

 

 

 

 

 

 

 

 

1282

(545)

 

 

 

 

 

 

 

 

1338

(489)

MLV 204-2 to MLV 200-2: Pig Runs - Cleaning / Gauge 8/5/25 (M) (8/5/2025) MLV 204-2 to MLV 200-2: Pig Runs - EMAT 8/21/25 (M) (8/21/2025)

MLV 204-2 to MLV 200-2: Pig Runs - MFL-A Combo 8/12/25 (M) (8/12/2025) MLV 204-2 to MLV 200-2: Pig Runs - MFL-C 8/19/25 (M) (8/19/2025)

MLV 204-2 to MLV 200-2: Pig Runs - Residual 8/14/25 (M) (8/14/2025) MLV 204-2 to MLV 200-2: Pig Runs - Rosen Caliper 8/7/25 (M) (8/7/2025)

MLV 205-2 to MLV 206-2: Special Permit Replacement (7/1/2025 - 9/1/2025) MLV 214-1 to MLV 209-1: Pig Re-Runs - EMAT 8/26/25 (8/26/2025)

MLV 216-2 to MLV 216-2A: Class Change Replacement (7/1/2025 - 9/1/2025) MLV 219-4 to MLV 214-4: Pig Runs - Cleaning / Gauge 8/19/25 (8/19/2025) MLV 219-4 to MLV 214-4: Pig Runs - EMAT 8/26/25 (8/26/2025)

MLV 219-4 to MLV 214-4: Pig Runs - MFL-C Combo 8/21/25 (8/21/2025)

Sta 204: Unit 2A - Change Bearing Fuses (8/4/2025 - 8/5/2025) Sta 204: Unit 5A - Change Bearing Fuses (8/6/2025 - 8/7/2025)

Station 237

(segment 237 FH)

 

1,017

 

925

(92)

 

557

(460)

 

557

(460)

 

557

(460)

MLV 236-1 to MLV 237-1BR: Special Permit Replacement (M) (8/11/2025 - 9/12/2025)

Station 237: Annual ESD Test (8/5/2025)

Station 237: Point to Point and Trans Cals (8/6/2025)

 

Station 245

(segment 245 FH)

 

 

997

 

 

815

(182)

 

 

840

(157)

 

 

997

 

 

997

MLV 237-2 to MLV 238-2: SCCDA (7/28/2025 - 8/9/2025)

Sta 241: Unit 1A - Device and Relief Valve Tests (8/11/2025) Sta 241: Unit 1B - Device and Relief Valve Tests (8/13/2025) Sta 241: Unit 2A - Device and Relief Valve Tests (8/12/2025) Sta 241: Unit 2B - Device and Relief Valve Tests (8/14/2025) Sta 249: Unit 1B - Crankcase Inspection (8/11/2025 - 8/15/2025)

Station 254

(segment 256 FH)

 

1,213

920

(293)

920

(293)

920

(293)

920

(293)

Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/8/2025 - 11/1/2025)

Station 261 Discharge East (segment 261

FH)

 

941

 

941

 

941

 

941

 

941

 

MLV 265

(segment 265 FH)

 

767

 

767

450

(317)

450

(317)

450

(317)

MLV 263-2 to 264-2: Pipe Replacement (8/12/2025 - 8/30/2025)

Fitchburg Lat to Gloucester (segment 268

FH)

 

202

 

185

(17)

 

185

(17)

 

185

(17)

 

202

MLV 270C-101.1 to MLV 270C-101BL: Anomaly Remediation (M) (8/4/2025 - 8/22/2025)


 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

August 2025 (updated 06/26/25)

 

-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

(8/4 - 8/10)

Week 2

(8/11 - 8/17)

Week 3

(8/18 - 8/24)

Week 4

(8/25 - 8/31)

 

Primary Outage(s)

 

Est. Operational Capacity (Operational Impact) - Thousand Dth

 

 

 

Station 307

(segment 307 BH)

 

 

 

 

1,148

 

 

 

895

(253)

 

 

 

850

(298)

 

 

 

930

(218)

 

 

 

 

1,148

Sta 219: Annual ESD Test (8/4/2025 - 8/7/2025)

Sta 219: Unit 13A - Mounting Valve Operators / Testing (8/4/2025 - 8/7/2025) Sta 219: Unit 13A - Unit Valve Replacement (8/4/2025 - 8/7/2025)

Sta 219: Unit 1B - Protective Device Checks (8/4/2025 - 8/7/2025) Sta 307 (Pigeon ): Annual ESD Test (8/11/2025 - 8/16/2025)

Sta 307: Unit 5A - Protective Device Checks (8/11/2025 - 8/16/2025) Sta 307: Unit 6A - Protective Device Checks (8/11/2025 - 8/16/2025) Sta 313 Coudersport: Annual ESD Test (8/19/2025 - 8/21/2025)

Station 315

(segment 315 BH)

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

Station 321

(segment 321 FH)

 

2,102

1965

(137)

 

2,102

 

2,102

 

2,102

MLV 324-1B to MLV 325-1: Anomaly Remediation (M) (7/28/2025 - 8/7/2025)

MLV 324

(segment 324 FH)

 

1,767

 

1,767

 

1,767

 

1,767

 

1,767

 

Station 405 HC Line (segment 299

FH)

 

803

 

803

 

803

 

803

 

803

 

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 2025 (updated 06/26/25)

 

-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

(9/1 - 9/7)

Week 2

(9/8 - 9/14)

Week 3

(9/15 - 9/21)

Week 4

(9/22 - 9/28)

 

Primary Outage(s)

 

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 409 (Donna Line) (segment 490

FH)

 

564

 

564

 

564

 

564

 

564

 

MLV 406

(segment 406 BH)

 

456

 

406

(50)

 

406

(50)

 

416

(40)

 

416

(40)

MLV 403-1 to MLV 404-1: Immediate Anomaly Remediation (M) (9/15/2025 - 10/4/2025)

MLV 405-1 to MLV 406-1: Immediate Anomaly Remediation (8/25/2025 -

9/13/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

 

445

(583)

 

445

(583)

 

445

(583)

 

1,028

MLV 17-2S to MLV 9-2D: Pig Runs - Cleaning / Gauge (M) (9/5/2025) MLV 17-2S to MLV 9-2D: Pig Runs - Cleaning Run 2 (M) (9/3/2025) MLV 17-2S to MLV 9-2D: Pig Runs - Hardspot (M) (9/16/2025)

MLV 17-2S to MLV 9-2D: Pig Runs - MFL (M) (9/11/2025)

Station 17

(segment 117 FH)

 

758

 

758

 

758

753

(5)

 

758

MLV 17-1D to MLV 20-1A: Pig Run - Cleaning 9/15/25 (9/15/2025)

MLV 17-1D to MLV 20-1A: Pig Run - Gauge 9/16/25 (9/16/2025) MLV 17-1D to MLV 20-1A: Pig Run - MFL-A 9/17/25 (9/17/2025)

Station 25

(segment 125 FH)

 

714

709

(5)

 

714

 

714

 

714

MLV 25-1 to MLV 26-1 Relocation: Highway 105 Widening (8/18/2025 - 9/6/2025)

Station 40 South

(segment 132 FH)

 

912

 

912

 

587

(325)

 

587

(325)

 

587

(325)

MLV 39-2 to MLV 40-2S: Anomaly Remediation (9/23/2025 - 10/6/2025) MLV 39-3 to MLV 40-3S: Anomaly Remediation (9/9/2025 - 9/22/2025)

Carthage Lateral (segment 700

FH)

 

323

 

323

215

(116)

 

323

 

323

MLV 706-1 to MLV 700-1: Pig Run - Maintenance (M) (9/9/2025)

 

 

 

 

 

 

Station 47

(segment 143 FH)

 

 

 

 

 

 

 

1,222

 

 

 

 

 

 

1097

(125)

 

 

 

 

 

 

762

(460)

 

 

 

 

 

 

1187

(35)

 

 

 

 

 

 

1187

(35)

MLV 47-1A to MLV 48-1: Class Change (9/1/2025 - 12/31/2025) MLV 47-1AT to MLV 49-1: Anomaly Remediation (1/6/2025 - 10/31/2025) MLV 47-3AT to MLV 47-3A: Anomaly Remediation (9/1/2025 - 9/5/2025)

MLV 48-3 to MLV 49-3: Anomaly Remediation (9/1/2025 - 9/5/2025) MLV 49-1 to MLV 50-1: Anomaly Remediation (3/4/2025 - 10/31/2025)

MLV 53-2BREH to MLV 53-2BR: Special Permit Replacement (9/1/2025 - 10/15/2025)

MLV 54-1D TO MLV 63-1S: Pig Runs - Cleaning / Gauge 9/16/25 (9/16/2025) MLV 54-1D TO MLV 63-1S: Pig Runs - CLP / IMU 9/18/25 (9/18/2025)

MLV 54-1D TO MLV 63-1S: Pig Runs - MFL-C 9/23/25 (9/23/2025) MLV 54-1D TO MLV 63-1S: Pig Runs - MFL-C 9/25/25 (9/25/2025)

Sta 47: Annual ESD Test (9/10/2025)

Sta 54 Greenville: Annual ESD Test & Maintenance (9/8/2025 - 9/11/2025)

Station 63

(segment 163 FH)

 

1,233

1160

(73)

1160

(73)

1160

(73)

1160

(73)

MLV 84-3 to MLV 85-3: Anomaly Remediation (8/25/2025 - 9/26/2025)

Station 823

(segment 823 BH)

 

686

 

686

 

686

 

686

 

686

 

Station 834

(segment 834 BH)

 

679

670

(9)

670

(9)

670

(9)

670

(9)

Sta 834: Unit 6A - Overhaul (3/3/2025 - 11/3/2025)

Station 534 South of Pool (segment 530

BH)

 

1,820

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

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

MLV 548

(segment 542 BH)

 

1,597

1455

(142)

1560

(37)

1560

(37)

 

1,597

MLV 541-1 to MLV 541-1A: Anomaly Remediation (8/19/2025 - 9/7/2025) Sta 546: Unit 1A - Engine and Compressor Overhaul (8/11/2025 - 9/15/2025)

 

 

Station 860

(segment 548 BH)

 

 

 

1,516

 

 

 

1445

(71)

 

 

 

1275

(241)

 

 

 

1500

(16)

 

 

 

1500

(16)

Sta 550: Unit 2A - Compressor Overhaul (8/25/2025 - 10/17/2025)

Sta 555 Collinwood: Annual ESD Test & Maintenance (9/8/2025 - 9/12/2025) Sta 555: Unit 1B - Vibration System Upgrade (9/8/2025 - 9/12/2025)

Sta 555: Unit 2A - Engine Maintenance (9/1/2025 - 9/5/2025) Sta 555: Unit 2A - Oil Seal (9/1/2025 - 9/5/2025)

Sta 555: Unit 5A - Engine Maintenance (9/1/2025 - 9/5/2025) Sta 555: Unit 6A - Engine Maintenance (9/1/2025 - 9/5/2025)

Station 860 North (Segment 860

BH)

 

1,793

 

1693

(100)

 

1693

(100)

 

1693

(100)

 

1693

(100)

Sta 860: Force Majeure (8/18/2023 - TBD)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2024 - 12/31/2025)


 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

September 2025 (updated 06/26/25)

 

-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

(9/1 - 9/7)

Week 2

(9/8 - 9/14)

Week 3

(9/15 - 9/21)

Week 4

(9/22 - 9/28)

 

Primary Outage(s)

 

Est. Operational Capacity (Operational Impact) - Thousand Dth

 

 

 

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

 

 

2285

(360)

 

 

 

 

 

 

 

 

2285

(360)

 

 

 

 

 

 

 

 

2285

(360)

 

 

 

 

 

 

 

 

1550

(1095)

MLV 106-1D to MLV 111-7BR: Make Piggable Valve MLV 107-7 & MLV 109-7 Replacements (M) (9/1/2025 - 9/19/2025)

MLV 108-3 to MLV 109-3A: Special Permit Pipe Replacement (9/22/2025 - 10/24/2025)

MLV 109-3 to MLV 109-3A: Class Change Pipe Replacement (9/22/2025 - 10/24/2025)

MLV 109-5 to MLV 109-5A: Class Change Pipe Replacement (9/22/2025 - 10/24/2025)

MLV 866-1 to MLV 867-1: Anomaly Remediation (9/22/2025 - 10/10/2025) MLV 868-1 to MLV 869-1: Anomaly Remediation (9/22/2025 - 10/10/2025) MLV 869-1 to MLV 870-1: Anomaly Remediation (9/22/2025 - 10/10/2025) MLV 871-2 to MLV 871-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 871-2A to MLV 872-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 872-2 to MLV 873-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 96-5 to MLV 102-5: Pig Runs - Cleaning / Gauge 9/25/25 (9/25/2025)

Sta 96: Unit 2D - Compressor Valves (9/22/2025 - 9/26/2025)

Station 114

(segment 114 BH)

 

920

 

920

 

920

850

(70)

 

920

Sta 118A Tyler Mountain: Annual ESD Test (9/16/2025 - 9/18/2025)

 

 

Station 204

(Segment 204 BH)

 

 

 

1,827

 

 

 

1741

(86)

 

 

 

1797

(30)

 

 

 

1797

(30)

 

 

 

1408

(419)

MLV 205-2 to MLV 206-2: Special Permit Replacement (7/1/2025 - 9/1/2025) MLV 213-2A to MLV 214-2: Special Permit Replacement (9/1/2025 - 10/31/2025) MLV 216-2 to MLV 216-2A: Class Change Replacement (7/1/2025 - 9/1/2025) Sta 204: Scrubber Filter (9/22/2025 - 9/24/2025)

Sta 209 Cambridge: Scrubber Filter (9/25/2025 - 9/27/2025)

Station 237

(segment 237 FH)

 

1,017

557

(460)

557

(460)

 

1,017

 

1,017

MLV 236-1 to MLV 237-1BR: Special Permit Replacement (M) (8/11/2025 - 9/12/2025)

Station 245

(segment 245 FH)

 

997

 

997

855

(142)

925

(72)

925

(72)

Sta 241: Unit 3A - C3 Cooper Upgrade (9/8/2025 - 9/27/2025) Sta 245: Unit 1C - Engine Exchange (9/8/2025 - 9/12/2025)

 

Station 254

(segment 256 FH)

 

 

1,213

 

920

(293)

 

920

(293)

 

920

(293)

 

455

(758)

MLV 254-1 to MLV 261-1: Pig Run - Maintenance (9/23/2025) MLV 254-2 to MLV 261-2: Pig Run - Maintenance (9/24/2025) MLV 254-3 to MLV 258-3: Pig Run - Maintenance (9/25/2025)

Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/8/2025 - 11/1/2025)

Station 261 Suction (segment 260

FH)

 

1,159

 

1,159

 

1,159

 

1,159

 

635

(524)

Sta 260A Southwick: Annual ESD Test (9/23/2025)

Station 261 Discharge East (segment 261

FH)

 

941

 

941

 

941

 

400

(541)

 

545

(396)

Sta 261 Agawam: Annual ESD Test (M) (9/16/2025 - 9/18/2025) Sta 264 Charlton: Annual ESD Test (9/25/2025)

Station 267 South (segment 266

FH)

 

469

 

312

(157)

 

312

(157)

 

312

(157)

 

312

(157)

Sta. 267: Bldg A Controls Upgrade (9/2/2025 - 11/26/2025)

Station 313 Discharge (segment 399

FH)

 

806

 

806

 

806

 

806

 

408

(398)

Sta 313: Unit 1C - Capacitor Replacement (9/22/2025 - 9/26/2025)

Station 315

(segment 315 BH)

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

MLV 324

(segment 324 FH)

 

1,767

 

1,767

 

1,767

 

1,767

 

1,767

 

Station 405 HC Line (segment 299

FH)

 

803

 

803

 

803

 

803

 

803

 

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.

 

TSP/TSP Name:  1939164-TENNESSEE GAS PIPELINE Critical: Y
Notice Type Desc (1):  MAINTENANCE Notice Type Desc (2):  MAINTENANCE
Notice Eff Date/Time:  06/26/2025 3:16:39PM Notice End Date/Time:  06/27/2025 9:00:00am
Post Date/Time:  6/26/2025 3:16:39 PM Notice ID: 395020
Reqrd Rsp:  1 Rsp Date:  06/26/2025
Notice Stat Desc:  INITIATE Prior Notice: 
Subject:  TGP Outage Impact Report
Notice Text:

TGP - Outage Impact Report Seven Day Forecast (updated 06/26/25)

-Primary impact restrictions may be necessary

-Major impact restrictions may be necessary

-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

(6/30)

Tuesday

(7/1)

Wednesday

(7/2)

Thursday

(7/3)

Friday

(7/4)

Saturday

(7/5)

Sunday

(7/6)

 

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

 

MLV 406

(segment 406 BH)

 

456

416

(40)

416

(40)

416

(40)

416

(40)

416

(40)

416

(40)

416

(40)

MLV 408-1 to MLV 409-1: Immediate Anomaly Remediation (6/17/2025 -

7/11/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

875

(153)

875

(153)

875

(153)

 

1,028

 

1,028

 

1,028

 

1,028

MLV 8-1 to MLV 9-1: Anomaly Remediation (6/5/2025 - 7/2/2025)

Station 17

(segment 117 FH)

 

758

438

(320)

438

(320)

438

(320)

438

(320)

753

(5)

753

(5)

753

(5)

MLV 17-2D to MLV 20-2A: Anomaly Remediation (6/25/2025 - 7/3/2025) MLV 19-3 to MLV 19-3A: Class Change Pipe Replacement (M) (6/24/2025 -

7/17/2025)

Station 25

(segment 125 FH)

 

714

 

714

 

714

 

714

 

714

 

714

 

714

 

714

 

Station 40 South

(segment 132 FH)

 

912

 

797

(115)

 

797

(115)

 

797

(115)

 

797

(115)

 

797

(115)

 

797

(115)

 

797

(115)

MLV 32-1L to MLV 33-1: PHMSA Immediate Anomaly Remediation (6/23/2025 - 8/15/2025)

MLV 34-2 to MLV 35-2: Anomaly Remediation (5/20/2025 - 7/11/2025)

Sta 32: Unit 3B - Compressor Overhaul (4/14/2025 - 7/15/2025)

Carthage Lateral (segment 700

FH)

 

323

 

323

258

(65)

 

323

 

323

 

323

 

323

 

323

Sta 703 Mansfield: Annual ESD, Maintenance (7/1/2025)

Station 40 KN South (segment 501

FH)

 

268

 

200

(68)

 

200

(68)

 

200

(68)

 

200

(68)

 

200

(68)

 

200

(68)

 

200

(68)

Sta. 500C1 Natchitoches: Emergent Repair - Turbine Vibration (6/20/2025 - TBD)

Station 40 North

(segment 140 FH)

 

1,175

950

(225)

950

(225)

950

(225)

 

1,175

 

1,175

 

1,175

 

1,175

Sta 40: HP Replacement - Bldg C Mod (6/25/2025 - 6/30/2025)

Sta 40: Unit 1C - Gasket Inspection / Replacement (6/30/2025 - 7/2/2025)

 

Station 47

(segment 143 FH)

 

 

1,176

 

 

1171

(5)

 

 

1116

(60)

 

 

1116

(60)

 

 

1116

(60)

 

 

1171

(5)

 

 

1171

(5)

 

 

1171

(5)

MLV 41-2 to MLV 42-2: Anomaly Remediation (5/21/2025 - 7/2/2025) MLV 47-1AT to MLV 49-1: Anomaly Remediation (1/6/2025 - 10/31/2025) MLV 49-1 to MLV 50-1: Anomaly Remediation (3/4/2025 - 10/31/2025) MLV 60-3 to MLV 59-3: Shallow Pipe Lowering (6/24/2025 - 7/9/2025) Sta 47: Unit 2D - 16K inspection & turbochargers (6/9/2025 - 7/25/2025)

Sta 63: Unit 2D - Safety Device Checks (7/1/2025 - 7/3/2025)

Station 63

(segment 163 FH)

 

1,233

1105

(128)

1105

(128)

1105

(128)

1105

(128)

 

1,233

 

1,233

 

1,233

MLV 82-3C to MLV 83-3: Anomaly Remediation (6/28/2025 - 7/3/2025)

Station 823

(segment 823 BH)

 

686

 

686

 

686

 

686

 

686

 

686

 

686

 

686

 

Station 834

(segment 834 BH)

 

679

670

(9)

670

(9)

670

(9)

670

(9)

670

(9)

670

(9)

670

(9)

Sta 834: Unit 6A - Overhaul (3/3/2025 - 11/3/2025)

Station 534 South of Pool (segment 530 BH)

 

 

1,820

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

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

MLV 548

(segment 542 BH)

 

1,597

1480

(117)

1480

(117)

1480

(117)

1480

(117)

1480

(117)

1480

(117)

1480

(117)

Sta 534: Unit 6A - Piston Liner & Unloader Replacements (3/25/2025 - 8/15/2025)

Sta 542: Unit 3A - Overhaul (2/12/2024 - 7/20/2025)

Station 860

(segment 548 BH)

 

1,516

 

1162

(354)

 

1500

(16)

 

1500

(16)

 

1500

(16)

 

1500

(16)

 

1500

(16)

 

1500

(16)

MLV 556-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) MLV 557-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) MLV 558-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025)

Sta 550: Unit 4A - Turbocharger Exchange (6/2/2025 - 8/1/2025)

 

 

 

 

Station 860 North (Segment 860 BH)

 

 

 

 

 

 

1,793

 

 

 

 

 

 

1439

(354)

 

 

 

 

 

 

1340

(450)

 

 

 

 

 

 

1340

(450)

 

 

 

 

 

 

1340

(450)

 

 

 

 

 

 

1655

(138)

 

 

 

 

 

 

1655

(138)

 

 

 

 

 

 

1655

(138)

MLV 560-2 to MLV 561-2: Class Change Pipe Replacement (6/9/2025 - 8/4/2025)

MLV 561-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) MLV 562-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) MLV 563-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) MLV 564-2: Make Piggable - Valve Replacement (6/9/2025 - 6/30/2025) St. 563: Unit 2A - Fuel Nozzle Cleaning (6/9/2025 - 7/3/2025)

Sta 860: Force Majeure (8/18/2023 - TBD)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2024 - 12/31/2025)

Sta 860: Unit 1B - Replace Lubrication System & Electronic Bearing System (6/23/2025 - 7/3/2025)

Sta 860: Unit 6A - Electronic Bearing System (6/30/2025 - 7/3/2025)

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

2,645

 

 

2565

(80)

 

 

2565

(80)

 

 

2565

(80)

 

 

2565

(80)

 

 

2565

(80)

 

 

2565

(80)

 

 

2565

(80)

MLV 107-3 to MLV 108-3: Anomaly Remediation (6/2/2025 - 7/20/2025) MLV 108-3 to MLV 109-3: Anomaly Remediation (6/23/2025 - 7/20/2025) MLV 109-3 to MLV 109-3A: Anomaly Remediation (6/23/2025 - 7/20/2025)

Sta 106: Unit 1C - Replace Power Cylinder Bearing #7 (4/14/2025 - 7/31/2025) Sta 106: Unit 6B - Engine Inspection (6/23/2025 - 7/3/2025)

Sta 87: Unit 3D - Turbocharger Exchange (4/28/2025 - 7/3/2025)

Station 114

(segment 114 BH)

 

920

 

920

 

920

 

920

 

920

 

920

 

920

 

920

 

Station 200

(segment 200 BH)

 

1,765

1750

(15)

1750

(15)

1750

(15)

1750

(15)

1750

(15)

1750

(15)

1750

(15)

MLV 111-3 to 111-3A: Immediate Anomaly Remediation (6/18/2025 - 7/7/2025)

 

 

 

 

Station 204

(Segment 204 BH)

 

 

 

 

 

1,827

 

 

 

 

1621

(206)

 

 

 

 

1701

(126)

 

 

 

 

1681

(146)

 

 

 

 

1736

(91)

 

 

 

 

1797

(30)

 

 

 

 

1797

(30)

 

 

 

 

1797

(30)

MLV 205-2 to MLV 206-2: Special Permit Replacement (7/1/2025 - 9/1/2025) MLV 209-2 to MLV 204-2: Pig Runs - Cleaning / Gauge 6/30/25 (6/30/2025) MLV 209-2 to MLV 204-2: Pig Runs - MFL-A 7/2/25 (7/2/2025)

MLV 209-3 to MLV 210-3A: Class Change Replacement (5/27/2025 - 6/30/2025)

MLV 216-2 to MLV 216-2A: Class Change Replacement (7/1/2025 - 9/1/2025) Sta 200: Unit 6A - Engine Inspection (6/30/2025 - 7/3/2025)

Sta 204: Unit 12A - Compressor Inspection (6/20/2025 - 7/2/2025) Sta 209: Unit 12A - Install Barring Jack (6/30/2025 - 7/2/2025)


 

 

 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

 

TGP - Outage Impact Report

 

 

 

-Major impact restrictions may be necessary

 

 

Seven Day Forecast (updated 06/26/25)

 

 

-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

(6/30)

Tuesday

(7/1)

Wednesday

(7/2)

Thursday

(7/3)

Friday

(7/4)

Saturday

(7/5)

Sunday

(7/6)

 

Primary Outage(s) that may Impact Throughput

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 245

(segment 245 FH)

 

997

975

(22)

975

(22)

975

(22)

975

(22)

975

(22)

975

(22)

975

(22)

Sta 241: Unit 1A - Main Bearing, Turbo, Compressor Boring & Valve Operator

(5/19/2025 - 7/11/2025)

Station 254

(segment 256 FH)

 

1,213

1195

(18)

1195

(18)

1195

(18)

1195

(18)

 

1,213

 

1,213

 

1,213

Sta 254: Unit 4A - Replace Power Cylinder Head (5/16/2025 - 7/3/2025)

Station 261 Discharge East (segment 261

FH)

 

941

 

941

 

941

 

941

 

941

 

941

 

941

 

941

 

Station 267 South (segment 266

FH)

 

469

 

395

(74)

 

395

(74)

 

395

(74)

 

395

(74)

 

469

 

469

 

469

MLV 272-2 to MLV 273-2: PHMSA Emergent Anomaly Remediation (6/18/2025

- 7/3/2025)

Tewksbury Incremental Lateral (segment 285

FH)

 

 

34

 

17

(17)

 

 

34

 

 

34

 

 

34

 

 

34

 

 

34

 

 

34

MLV 270B-101.1 TO MLV 270B-103: Pig Runs - MFL-C / Cal / IMU Combo 6/30/25 (M) (6/30/2025)

Station 307

(segment 307 BH)

 

1,148

 

1130

(18)

 

1065

(83)

 

1065

(83)

 

1065

(83)

 

1,148

 

1,148

 

1,148

Sta 219: Unit 10A - Install New Foundation Chocks (5/5/2025 - 7/3/2025) Sta 219: Unit 11A - Install New Foundation Chocks (5/5/2025 - 7/3/2025) Sta 307: Unit 5A - Cooling System (7/1/2025)

Sta 307: Unit 5A - Ignition Testing (7/2/2025 - 7/3/2025)

Station 315

(segment 315 BH)

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

Station 317

(segment 317 BH)

 

1,579

 

1,579

 

1,579

1375

(204)

 

1,579

 

1,579

 

1,579

 

1,579

STA 317: Upgrade Communications UPS System (7/2/2025)

MLV 324

(segment 324 FH)

 

1,767

1410

(357)

1410

(357)

 

1,767

 

1,767

 

1,767

 

1,767

 

1,767

Sta 327: Unit 1A - Solar Inspection (6/23/2025 - 7/1/2025)

Station 261

South 300 Line

(segment 355 BH)

 

47

 

0

(47)

 

0

(47)

 

0

(47)

 

0

(47)

 

47

 

47

 

47

MLV 346-1: MLV Replacement (M) (6/25/2025 - 7/3/2025)

Station 405

HC Line (segment 299 FH)

 

803

 

803

 

803

 

803

 

803

 

803

 

803

 

803

 

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 2025 (updated 06/26/25)

 

 

-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

(6/30 - 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

Station 409 (Donna Line) (segment 490

FH)

 

564

 

 

564

 

564

 

564

 

564

 

MLV 406

(segment 406 BH)

 

456

 

 

416

(40)

 

396

(60)

 

396

(60)

 

396

(60)

MLV 407-1 TO MLV 408-1: Immediate Anomaly Remediation (7/14/2025 - 8/2/2025)

MLV 408-1 to MLV 409-1: Immediate Anomaly Remediation (6/17/2025 -

7/11/2025)

Station 1

(segment 101 BH)

 

400

 

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

 

 

1,028

 

1,028

702

(326)

702

(326)

MLV 8-3 to MLV 9-3: Anomaly Remediation (7/21/2025 - 8/8/2025)

Station 17

(segment 117 FH)

 

758

 

 

753

(5)

 

753

(5)

 

753

(5)

 

753

(5)

MLV 19-3 to MLV 19-3A: Class Change Pipe Replacement (M) (6/24/2025 - 7/17/2025)

MLV 20-1 to MLV 20-1BR: Class Change Pipe Replacement (7/22/2025 -

8/7/2025)

Station 25

(segment 125 FH)

 

714

 

 

714

 

714

 

714

564

(150)

MLV 25-3 to MLV 32-3: Pig Run - Maintenance (7/31/2025)

Station 40 South

(segment 132 FH)

 

912

 

 

797

(115)

 

892

(20)

 

892

(20)

 

892

(20)

MLV 32-1L to MLV 33-1: PHMSA Immediate Anomaly Remediation (6/23/2025 - 8/15/2025)

MLV 34-2 to MLV 35-2: Anomaly Remediation (5/20/2025 - 7/11/2025)

Sta 32: Unit 3B - Compressor Overhaul (4/14/2025 - 7/15/2025)

Carthage Lateral (segment 700

FH)

 

323

 

 

323

 

323

175

(148)

 

323

Sta 40: Carthage Check Meter (M) (7/21/2025 - 7/24/2025)

Station 40 KN South (segment 501 FH)

 

 

268

 

 

200

(68)

 

225

(43)

 

 

268

 

150

(118)

Sta 500-1 to Sta 823 (MLV 507-1): Pig Run - Maintenance (M) (7/30/2025) Sta 504 Pitkin: Annual ESD test (7/14/2025 - 7/18/2025)

Sta 504: Separator Filters (7/14/2025)

Sta. 500C1 Natchitoches: Emergent Repair - Turbine Vibration (6/20/2025 - TBD)

 

 

 

 

 

 

 

 

 

Station 47

(segment 143 FH)

 

 

 

 

 

 

 

 

 

 

1,176

 

 

 

 

 

 

 

 

 

 

871

(305)

 

 

 

 

 

 

 

 

 

1011

(165)

 

 

 

 

 

 

 

 

 

1031

(145)

 

 

 

 

 

 

 

 

 

1031

(145)

MLV 40-3 to MLV 47-3: Pig Run - EMAT 7/9/25 (M) (7/9/2025)

MLV 47-1AT to MLV 49-1: Anomaly Remediation (1/6/2025 - 10/31/2025) MLV 47-2A to MLV 48-2: Anomaly Remediation (M) (7/21/2025 - 7/30/2025) MLV 49-1 to MLV 50-1: Anomaly Remediation (3/4/2025 - 10/31/2025) MLV 53-2 TO MLV 53-2CBR: Anomaly Remediation (7/30/2025 - 8/8/2025) MLV 54-4D TO MLV 63-4S: Pig Runs - Caliper 7/24/25 (7/24/2025)

MLV 54-4D TO MLV 63-4S: Pig Runs - Cleaning / Gauge 7/22/25 (7/22/2025) MLV 54-4D TO MLV 63-4S: Pig Runs - EMAT 7/31/25 (7/31/2025)

MLV 54-4D TO MLV 63-4S: Pig Runs - MFL-C 7/29/25 (7/29/2025)

MLV 59-3 to MLV 58-3: Shallow Pipe Lowering (7/10/2025 - 7/19/2025) MLV 60-3 to MLV 59-3: Shallow Pipe Lowering (6/24/2025 - 7/9/2025) Sta 47: B Building - Clean Motor Control Center (7/7/2025 - 7/11/2025) Sta 47: C Building - Clean Motor Control Center (7/7/2025 - 7/11/2025) Sta 47: D Building - Clean Motor Control Center (7/7/2025 - 7/11/2025) Sta 47: E Building - Clean Motor Control Center (7/7/2025 - 7/11/2025)

Sta 47: Scrubber Filter Separator Cleaning & Inspection (7/14/2025 - 7/18/2025) Sta 47: Transformer Inspection (7/7/2025 - 7/11/2025)

Sta 47: Unit 2D - 16K inspection & turbochargers (6/9/2025 - 7/25/2025)

 

Station 63

(segment 163 FH)

 

 

1,233

 

 

 

1,233

 

 

1170

(63)

 

 

1,233

 

 

1085

(148)

MLV 71-1D to MLV 77-1A: Pig Runs - Cleaning / Gauge 7/15/25 (7/15/2025) MLV 71-1D to MLV 77-1A: Pig Runs - MDS 7/17/25 (7/17/2025)

MLV 82-2C to MLV 87-2S: Pig Runs - Cleaning / Gauge 7/29/25 (7/29/2025) MLV 82-2C to MLV 87-2S: Pig Runs - MDS 7/31/25 (7/31/2025)

Station 823

(segment 823 BH)

 

686

 

 

686

 

686

 

686

 

686

 

Station 834

(segment 834 BH)

 

679

 

670

(9)

670

(9)

670

(9)

670

(9)

Sta 834: Unit 6A - Overhaul (3/3/2025 - 11/3/2025)

Station 534 South of Pool (segment 530

BH)

 

1,820

 

 

1560

(260)

 

1798

(22)

 

1798

(22)

 

1798

(22)

Sta 530: Scrubber Inspection / Filter Replacement (7/7/2025 - 7/11/2025) Sta 530: Unit 3A - Crankshaft Replacement (6/9/2025 - 12/31/2025)

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

Sta 530 Bay ST. Louis: Annual ESD Test (7/7/2025 - 7/11/2025)

 

MLV 548

(segment 542 BH)

 

 

1,597

 

 

1480

(117)

 

1480

(117)

 

1575

(22)

 

1575

(22)

Sta 534: Unit 6A - Piston Liner & Unloader Replacements (3/25/2025 - 8/15/2025)

Sta 542: Unit 3A - Overhaul (2/12/2024 - 7/20/2025)

Sta 546: Unit 4A - Engine and Compressor Overhaul (7/28/2025 - 8/22/2025)

Station 860

(segment 548 BH)

 

1,516

 

1450

(66)

1450

(66)

1450

(66)

1450

(66)

Sta 550: Unit 3A - Engine Overhaul (7/7/2025 - 8/8/2025)

Sta 550: Unit 4A - Turbocharger Exchange (6/2/2025 - 8/1/2025) Sta 555: Unit 1A - Engine Maintenance (7/7/2025 - 7/17/2025)


 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

TGP - Outage Impact Report

 

 

-Major impact restrictions may be necessary

 

 

July 2025 (updated 06/26/25)

 

 

-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

(6/30 - 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

Station 860 North (Segment 860 BH)

 

 

1,793

 

 

1655

(138)

 

1655

(138)

 

1655

(138)

 

1655

(138)

MLV 560-2 to MLV 561-2: Class Change Pipe Replacement (6/9/2025 -

8/4/2025)

Sta 860: Force Majeure (8/18/2023 - TBD)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2024 - 12/31/2025)

 

 

 

 

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

 

 

 

2565

(80)

 

 

 

 

 

 

 

 

2370

(275)

 

 

 

 

 

 

 

 

2370

(275)

 

 

 

 

 

 

 

 

2290

(355)

MLV 101-5 to MLV 102-5: Class Change Pipe Replacement (7/14/2025 - 8/16/2025)

MLV 107-3 to MLV 108-3: Anomaly Remediation (6/2/2025 - 7/20/2025) MLV 108-3 to MLV 109-3: Anomaly Remediation (6/23/2025 - 7/20/2025) MLV 109-3 to MLV 109-3A: Anomaly Remediation (6/23/2025 - 7/20/2025) MLV 870-1 to MLV 870-1R: Anomaly Remediation (7/26/2025 - 8/9/2025) MLV 871-2 to MLV 871-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 871-2A to MLV 872-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 872-1 to MLV 873-1: Anomaly Remediation (7/14/2025 - 7/25/2025) MLV 872-2 to MLV 873-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 875-1 to MLV 876-1R: Anomaly Remediation (7/14/2025 - 7/25/2025) MLV 93-3 to MLV 94-3: HDD River Crossing Replacement (7/18/2025 - 8/27/2025)

Sta 106: Unit 1C - Replace Power Cylinder Bearing #7 (4/14/2025 - 7/31/2025) Sta 87: Unit 1E - Anchor Bolt Repairs (7/8/2025 - 7/14/2025)

Sta 87: Unit 2E - Anchor Bolt Repairs (7/14/2025 - 7/21/2025)

Station 114

(segment 114 BH)

 

920

 

 

920

800

(120)

 

920

 

920

Sta 114: Unit 1D - Turbine Swap (7/14/2025 - 7/19/2025)

Station 200

(segment 200 BH)

 

1,765

 

1750

(15)

1750

(15)

1750

(15)

 

1,765

MLV 110-3 to MLV 111-3A: Anomaly Remediation (7/14/2025 - 7/26/2025) MLV 111-3 to 111-3A: Immediate Anomaly Remediation (6/18/2025 - 7/7/2025)

 

 

 

Station 204

(Segment 204 BH)

 

 

 

 

1,827

 

 

 

 

1701

(126)

 

 

 

1502

(325)

 

 

 

1797

(30)

 

 

 

1797

(30)

MLV 205-2 to MLV 206-2: Special Permit Replacement (7/1/2025 - 9/1/2025) MLV 216-2 to MLV 216-2A: Class Change Replacement (7/1/2025 - 9/1/2025) Sta 200 Greenup: Annual ESD Test (7/14/2025 - 7/18/2025)

Sta 200: Unit 11A - Engine Inspection (7/7/2025 - 7/10/2025) Sta 204: Unit 1A - Change Bearing Fuses (7/7/2025 - 7/10/2025) Sta 209: Unit 10A - C2 Pressure Packing (7/7/2025 - 7/10/2025) Sta 214: Annual ESD Test & Maintenance (7/14/2025 - 7/18/2025)

Station 219 to

Station 224

(Segment 219 FH)

 

540

 

 

540

 

445

(95)

 

540

 

540

Sta 219: Unit 1A to 6A - Protective Device Checks (7/14/2025 - 7/18/2025)

Station 230C (segment 296

FH)

 

743

 

 

743

570

(173)

 

743

 

743

Station 230C: Annual ESD (M) (7/16/2025 - 7/17/2025)

 

 

 

Station 245

(segment 245 FH)

 

 

 

 

997

 

 

 

 

925

(72)

 

 

 

925

(72)

 

 

 

925

(72)

 

 

 

815

(182)

MLV 237-2 to MLV 238-2: SCCDA (7/28/2025 - 8/9/2025)

MLV 240-1A to MLV 241-1: Anomaly Remediation (7/7/2025 - 7/12/2025) MLV 241-1 to MLV 242-1: Anomaly Remediation (7/7/2025 - 7/12/2025) MLV 242-1 to MLV 243-1: Anomaly Remediation (7/14/2025 - 7/19/2025) MLV 244-1 to MLV 245-1S: Anomaly Remediation (7/14/2025 - 7/26/2025)

Sta 241: Unit 1A - Main Bearing, Turbo, Compressor Boring & Valve Operator (5/19/2025 - 7/11/2025)

Sta 241: Unit 3A - Device and Relief Valve Tests (7/15/2025 - 7/16/2025)

Sta 249: Unit 2A - Engine Maintenance (7/14/2025 - 7/23/2025)

Station 254

(segment 256 FH)

 

1,213

 

 

945

(268)

 

945

(268)

 

920

(293)

 

920

(293)

MLV 259-1 to MLV 260-1: Anomaly Remediation - Dig 2023-18 (Cutout) (7/8/2025 - 7/19/2025)

Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/8/2025 - 11/1/2025)

Station 261 Discharge East (segment 261

FH)

 

941

 

 

941

 

941

 

941

 

941

 

MLV 265

(segment 265 FH)

 

767

 

 

767

390

(377)

390

(377)

390

(377)

MLV 264-2 to 264-2A: Pipe Replacement (7/15/2025 - 7/30/2025)

Station 266A (segment 282 FH)

 

371

 

 

371

 

371

 

345

(26)

 

371

MLV 266A-102A TO MLV 266A-104A: Pig Runs - Cleaning / Gauge 7/22/25 (M) (7/22/2025)

MLV 266A-102A TO MLV 266A-104A: Pig Runs - MFL-A / Cal / IMU Combo

7/23/25 (M) (7/23/2025)

Fitchburg Lat to Gloucester (segment 268

FH)

 

202

 

 

202

 

140

(62)

 

140

(62)

 

202

MLV 267-1A to MLV 268-1: Anomaly Remediation (7/14/2025 - 7/19/2025) MLV 270-1A to MLV 270-101.1R: Anomaly Remediation (7/21/2025 - 7/26/2025)

 

Station 307

(segment 307 BH)

 

 

1,148

 

 

 

1,148

 

1133

(15)

 

1105

(43)

 

1105

(43)

Sta 219: Unit 7A to 13A - Protective Device Checks (7/14/2025 - 7/18/2025) Sta 307: Unit 1A - Protective Device Checks (7/21/2025 - 7/22/2025) Sta 307: Unit 2A - Protective Device Checks (7/23/2025 - 7/25/2025) Sta 307: Unit 3A - Protective Device Checks (7/28/2025 - 7/29/2025)

Sta 307: Unit 4A - Protective Device Checks (7/30/2025 - 8/1/2025)

Station 315

(segment 315 BH)

 

1,854

 

 

1,854

 

1,854

 

1,854

 

1,854

 


 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

TGP - Outage Impact Report

 

 

-Major impact restrictions may be necessary

 

 

July 2025 (updated 06/26/25)

 

 

-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

(6/30 - 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

 

Station 317

(segment 317 BH)

 

 

1,579

 

 

1555

(24)

 

1550

(29)

 

 

1,579

 

 

1,579

MLV 317-1 to MLV 318-1: Hot Tap for New Meter (Meter: Port Royal PIN: 57162)

(M) (7/14/2025 - 7/15/2025)

MLV 317-2 to MLV 318-2: Hot Tap for New Meter (Meter: Port Royal PIN: 57162)

(M) (7/16/2025 - 7/17/2025)

Sta 317: Unit 1B - Engine Maintenace (7/8/2025 - 7/11/2025)

Station 321

(segment 321 FH)

 

2,102

 

 

2,102

 

2,102

 

2,102

1965

(137)

MLV 324-1B to MLV 325-1: Anomaly Remediation (M) (7/28/2025 - 8/7/2025)

MLV 324

(segment 324 FH)

 

1,767

 

 

1,767

 

1,767

1200

(567)

 

1,767

MLV 327-2B to MLV 328-2: Anomaly Remediation (7/21/2025 - 7/26/2025)

Station 405 HC Line (segment 299

FH)

 

803

 

 

690

(113)

 

803

 

803

 

803

Sta 405A: Annual ESD Test (7/8/2025) Sta 405A: Filter / Scrubber Change (7/9/2025)

Sta 405A: Point to Point and Trans Cals (7/9/2025)

Sta 405A: Unit Protective Device Tests (7/9/2025)

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.


 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

August 2025 (updated 06/26/25)

 

-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

(8/4 - 8/10)

Week 2

(8/11 - 8/17)

Week 3

(8/18 - 8/24)

Week 4

(8/25 - 8/31)

 

Primary Outage(s)

 

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 409 (Donna Line) (segment 490

FH)

 

564

 

564

 

564

 

564

 

564

 

MLV 406

(segment 406 BH)

 

456

 

396

(60)

 

396

(60)

 

396

(60)

 

406

(50)

MLV 405-1 to MLV 406-1: Immediate Anomaly Remediation (8/25/2025 - 9/13/2025)

MLV 406-1 to MLV 407-1: Immediate Anomaly Remediation (8/4/2025 -

8/23/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

702

(326)

 

1,028

 

1,028

445

(583)

MLV 17-2S to MLV 9-2D: Pigging Cleaning Run 1 (M) (8/28/2025) MLV 8-3 to MLV 9-3: Anomaly Remediation (7/21/2025 - 8/8/2025)

Station 17

(segment 117 FH)

 

758

 

753

(5)

 

740

(18)

 

740

(18)

 

758

MLV 20-1 to MLV 20-1BR: Class Change Pipe Replacement (7/22/2025 - 8/7/2025)

MLV 21-1 to MLV 22-1: Meter Upgrade (Meter: Tomball PIN: 420898) (M)

(8/11/2025 - 8/22/2025)

Station 25

(segment 125 FH)

 

714

 

714

 

714

709

(5)

709

(5)

MLV 25-1 to MLV 26-1 Relocation: Highway 105 Widening (8/18/2025 - 9/6/2025)

Station 40 South

(segment 132 FH)

 

912

 

882

(30)

 

882

(30)

 

912

 

912

MLV 32-1L to MLV 33-1: PHMSA Immediate Anomaly Remediation (6/23/2025 - 8/15/2025)

MLV 35-1 to MLV 36-1: PHMSA Immediate Anomaly Remediation (8/4/2025 -

8/15/2025)

Station 40 KN South (segment 501

FH)

 

268

 

200

(68)

 

268

 

200

(68)

 

200

(68)

Sta 40: HP Replacement - 500C1 Mod (8/4/2025 - 8/9/2025)

Sta 40: HP Replacement - 500C1 Mod & 1C KN Line (8/22/2025 - 8/30/2025)

Station 40 North

(segment 140 FH)

 

1,176

 

1,176

951

(225)

951

(225)

1006

(170)

Sta 40: HP Replacement - 500C1 Mod & 1C 100 Line (8/22/2025 - 8/30/2025) Sta 40: HP Replacement - Bldg C Mod (8/13/2025 - 8/18/2025)

 

 

Station 47

(segment 143 FH)

 

 

 

1,177

 

 

852

(325)

 

 

1172

(5)

 

 

1172

(5)

 

 

972

(205)

MLV 47-1AT to MLV 49-1: Anomaly Remediation (1/6/2025 - 10/31/2025) MLV 49-1 to MLV 50-1: Anomaly Remediation (3/4/2025 - 10/31/2025) MLV 51-3 to MLV 52-3: Anomaly Remediation (8/25/2025 - 8/29/2025) MLV 52-2 to MLV 53-2: Anomaly Remediation (8/11/2025 - 8/29/2025) MLV 53-2 TO MLV 53-2CBR: Anomaly Remediation (7/30/2025 - 8/8/2025) MLV 53-3 to MLV 53-3CR: Anomaly Remediation (8/25/2025 - 8/29/2025)

Sta 54: Substation Inspection (8/4/2025 - 8/8/2025)

Station 63

(segment 163 FH)

 

1,233

 

1,233

 

1,233

 

1,233

660

(573)

MLV 84-3 to MLV 85-3: Anomaly Remediation (8/25/2025 - 9/26/2025) Sta 63 Batesville: Annual ESD Test (8/27/2025)

Station 823

(segment 823 BH)

 

686

 

686

 

686

 

686

 

686

 

Station 834

(segment 834 BH)

 

679

670

(9)

670

(9)

670

(9)

670

(9)

Sta 834: Unit 6A - Overhaul (3/3/2025 - 11/3/2025)

Station 847

(segment 847 BH)

 

284

 

284

 

284

 

284

220

(64)

Sta 847 Coffeeville: Annual ESD Test (8/27/2025 - 8/28/2025)

Station 534 South of Pool (segment 530

BH)

 

1,820

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

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

 

 

 

 

MLV 548

(segment 542 BH)

 

 

 

 

 

1,597

 

 

 

 

1330

(267)

 

 

 

 

1475

(122)

 

 

 

 

1255

(342)

 

 

 

 

1255

(342)

MLV 540-1 to MLV 540-1A: Anomaly Remediation (8/19/2025 - 8/28/2025) MLV 541-1 to MLV 541-1A: Anomaly Remediation (8/19/2025 - 9/7/2025) Sta 534: Scrubber Inspection / Filter Replacement (8/4/2025 - 8/8/2025) Sta 534: Unit 6A - Piston Liner & Unloader Replacements (3/25/2025 - 8/15/2025)

Sta 546: Annual ESD Tests, Scrubber filter Inspections, Changing Unit Valves (8/4/2025 - 8/10/2025)

Sta 546: Unit 1A - Engine and Compressor Overhaul (8/11/2025 - 9/15/2025) Sta 546: Unit 4A - Engine and Compressor Overhaul (7/28/2025 - 8/22/2025)

Station 860

(segment 548 BH)

 

1,516

 

1511

(5)

 

1,516

 

920

(596)

 

1500

(16)

MLV 550-2 TO MLV 546-2: Pig Runs - Cleaning 8/19/25 (8/19/2025) MLV 550-2 TO MLV 546-2: Pig Runs - EMAT 8/21/25 (8/21/2025)

Sta 550: Unit 2A - Compressor Overhaul (8/25/2025 - 10/17/2025)

Sta 550: Unit 3A - Engine Overhaul (7/7/2025 - 8/8/2025)


 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

August 2025 (updated 06/26/25)

 

-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

(8/4 - 8/10)

Week 2

(8/11 - 8/17)

Week 3

(8/18 - 8/24)

Week 4

(8/25 - 8/31)

 

Primary Outage(s)

 

Est. Operational Capacity (Operational Impact) - Thousand Dth

 

Station 860 North (Segment 860 BH)

 

 

 

1,793

 

 

1655

(138)

 

 

1693

(100)

 

 

1693

(100)

 

 

1693

(100)

MLV 560-2 to MLV 561-2: Class Change Pipe Replacement (6/9/2025 -

8/4/2025)

MLV 861-1 to MLV 862-1: Install New 30" Valve 861-1A (8/18/2025 - 8/30/2025)

Sta 860: Force Majeure (8/18/2023 - TBD)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2024 - 12/31/2025)

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

2,645

 

 

 

 

2290

(355)

 

 

 

 

2300

(345)

 

 

 

 

2445

(200)

 

 

 

 

2445

(200)

MLV 101-5 to MLV 102-5: Class Change Pipe Replacement (7/14/2025 - 8/16/2025)

MLV 870-1 to MLV 870-1R: Anomaly Remediation (7/26/2025 - 8/9/2025) MLV 871-2 to MLV 871-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 871-2A to MLV 872-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 872-2 to MLV 873-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 93-3 to MLV 94-3: HDD River Crossing Replacement (7/18/2025 - 8/27/2025)

Sta 106 Clay City: Upgrade B Building Jacket Water System (8/4/2025 -

8/8/2025)

Station 114

(segment 114 BH)

 

920

 

920

 

920

 

920

780

(140)

Sta 119A Tyler Mountain: Unit 1A - 4k Hr Inspection (8/25/2025 - 8/27/2025)

Station 200

(segment 200 BH)

 

1,765

1760

(5)

1760

(5)

1760

(5)

1760

(5)

MLV 111-3B to MLV 112-3: Make Piggable (8/4/2025 - 8/25/2025)

 

 

 

 

 

 

 

 

Station 204

(Segment 204 BH)

 

 

 

 

 

 

 

 

 

1,827

 

 

 

 

 

 

 

 

1665

(162)

 

 

 

 

 

 

 

 

1731

(96)

 

 

 

 

 

 

 

 

1282

(545)

 

 

 

 

 

 

 

 

1338

(489)

MLV 204-2 to MLV 200-2: Pig Runs - Cleaning / Gauge 8/5/25 (M) (8/5/2025) MLV 204-2 to MLV 200-2: Pig Runs - EMAT 8/21/25 (M) (8/21/2025)

MLV 204-2 to MLV 200-2: Pig Runs - MFL-A Combo 8/12/25 (M) (8/12/2025) MLV 204-2 to MLV 200-2: Pig Runs - MFL-C 8/19/25 (M) (8/19/2025)

MLV 204-2 to MLV 200-2: Pig Runs - Residual 8/14/25 (M) (8/14/2025) MLV 204-2 to MLV 200-2: Pig Runs - Rosen Caliper 8/7/25 (M) (8/7/2025)

MLV 205-2 to MLV 206-2: Special Permit Replacement (7/1/2025 - 9/1/2025) MLV 214-1 to MLV 209-1: Pig Re-Runs - EMAT 8/26/25 (8/26/2025)

MLV 216-2 to MLV 216-2A: Class Change Replacement (7/1/2025 - 9/1/2025) MLV 219-4 to MLV 214-4: Pig Runs - Cleaning / Gauge 8/19/25 (8/19/2025) MLV 219-4 to MLV 214-4: Pig Runs - EMAT 8/26/25 (8/26/2025)

MLV 219-4 to MLV 214-4: Pig Runs - MFL-C Combo 8/21/25 (8/21/2025)

Sta 204: Unit 2A - Change Bearing Fuses (8/4/2025 - 8/5/2025) Sta 204: Unit 5A - Change Bearing Fuses (8/6/2025 - 8/7/2025)

Station 237

(segment 237 FH)

 

1,017

 

925

(92)

 

557

(460)

 

557

(460)

 

557

(460)

MLV 236-1 to MLV 237-1BR: Special Permit Replacement (M) (8/11/2025 - 9/12/2025)

Station 237: Annual ESD Test (8/5/2025)

Station 237: Point to Point and Trans Cals (8/6/2025)

 

Station 245

(segment 245 FH)

 

 

997

 

 

815

(182)

 

 

840

(157)

 

 

997

 

 

997

MLV 237-2 to MLV 238-2: SCCDA (7/28/2025 - 8/9/2025)

Sta 241: Unit 1A - Device and Relief Valve Tests (8/11/2025) Sta 241: Unit 1B - Device and Relief Valve Tests (8/13/2025) Sta 241: Unit 2A - Device and Relief Valve Tests (8/12/2025) Sta 241: Unit 2B - Device and Relief Valve Tests (8/14/2025) Sta 249: Unit 1B - Crankcase Inspection (8/11/2025 - 8/15/2025)

Station 254

(segment 256 FH)

 

1,213

920

(293)

920

(293)

920

(293)

920

(293)

Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/8/2025 - 11/1/2025)

Station 261 Discharge East (segment 261

FH)

 

941

 

941

 

941

 

941

 

941

 

MLV 265

(segment 265 FH)

 

767

 

767

450

(317)

450

(317)

450

(317)

MLV 263-2 to 264-2: Pipe Replacement (8/12/2025 - 8/30/2025)

Fitchburg Lat to Gloucester (segment 268

FH)

 

202

 

185

(17)

 

185

(17)

 

185

(17)

 

202

MLV 270C-101.1 to MLV 270C-101BL: Anomaly Remediation (M) (8/4/2025 - 8/22/2025)


 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

August 2025 (updated 06/26/25)

 

-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

(8/4 - 8/10)

Week 2

(8/11 - 8/17)

Week 3

(8/18 - 8/24)

Week 4

(8/25 - 8/31)

 

Primary Outage(s)

 

Est. Operational Capacity (Operational Impact) - Thousand Dth

 

 

 

Station 307

(segment 307 BH)

 

 

 

 

1,148

 

 

 

895

(253)

 

 

 

850

(298)

 

 

 

930

(218)

 

 

 

 

1,148

Sta 219: Annual ESD Test (8/4/2025 - 8/7/2025)

Sta 219: Unit 13A - Mounting Valve Operators / Testing (8/4/2025 - 8/7/2025) Sta 219: Unit 13A - Unit Valve Replacement (8/4/2025 - 8/7/2025)

Sta 219: Unit 1B - Protective Device Checks (8/4/2025 - 8/7/2025) Sta 307 (Pigeon ): Annual ESD Test (8/11/2025 - 8/16/2025)

Sta 307: Unit 5A - Protective Device Checks (8/11/2025 - 8/16/2025) Sta 307: Unit 6A - Protective Device Checks (8/11/2025 - 8/16/2025) Sta 313 Coudersport: Annual ESD Test (8/19/2025 - 8/21/2025)

Station 315

(segment 315 BH)

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

Station 321

(segment 321 FH)

 

2,102

1965

(137)

 

2,102

 

2,102

 

2,102

MLV 324-1B to MLV 325-1: Anomaly Remediation (M) (7/28/2025 - 8/7/2025)

MLV 324

(segment 324 FH)

 

1,767

 

1,767

 

1,767

 

1,767

 

1,767

 

Station 405 HC Line (segment 299

FH)

 

803

 

803

 

803

 

803

 

803

 

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 2025 (updated 06/26/25)

 

-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

(9/1 - 9/7)

Week 2

(9/8 - 9/14)

Week 3

(9/15 - 9/21)

Week 4

(9/22 - 9/28)

 

Primary Outage(s)

 

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 409 (Donna Line) (segment 490

FH)

 

564

 

564

 

564

 

564

 

564

 

MLV 406

(segment 406 BH)

 

456

 

406

(50)

 

406

(50)

 

416

(40)

 

416

(40)

MLV 403-1 to MLV 404-1: Immediate Anomaly Remediation (M) (9/15/2025 - 10/4/2025)

MLV 405-1 to MLV 406-1: Immediate Anomaly Remediation (8/25/2025 -

9/13/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

 

445

(583)

 

445

(583)

 

445

(583)

 

1,028

MLV 17-2S to MLV 9-2D: Pig Runs - Cleaning / Gauge (M) (9/5/2025) MLV 17-2S to MLV 9-2D: Pig Runs - Cleaning Run 2 (M) (9/3/2025) MLV 17-2S to MLV 9-2D: Pig Runs - Hardspot (M) (9/16/2025)

MLV 17-2S to MLV 9-2D: Pig Runs - MFL (M) (9/11/2025)

Station 17

(segment 117 FH)

 

758

 

758

 

758

753

(5)

 

758

MLV 17-1D to MLV 20-1A: Pig Run - Cleaning 9/15/25 (9/15/2025)

MLV 17-1D to MLV 20-1A: Pig Run - Gauge 9/16/25 (9/16/2025) MLV 17-1D to MLV 20-1A: Pig Run - MFL-A 9/17/25 (9/17/2025)

Station 25

(segment 125 FH)

 

714

709

(5)

 

714

 

714

 

714

MLV 25-1 to MLV 26-1 Relocation: Highway 105 Widening (8/18/2025 - 9/6/2025)

Station 40 South

(segment 132 FH)

 

912

 

912

 

587

(325)

 

587

(325)

 

587

(325)

MLV 39-2 to MLV 40-2S: Anomaly Remediation (9/23/2025 - 10/6/2025) MLV 39-3 to MLV 40-3S: Anomaly Remediation (9/9/2025 - 9/22/2025)

Carthage Lateral (segment 700

FH)

 

323

 

323

215

(116)

 

323

 

323

MLV 706-1 to MLV 700-1: Pig Run - Maintenance (M) (9/9/2025)

 

 

 

 

 

 

Station 47

(segment 143 FH)

 

 

 

 

 

 

 

1,222

 

 

 

 

 

 

1097

(125)

 

 

 

 

 

 

762

(460)

 

 

 

 

 

 

1187

(35)

 

 

 

 

 

 

1187

(35)

MLV 47-1A to MLV 48-1: Class Change (9/1/2025 - 12/31/2025) MLV 47-1AT to MLV 49-1: Anomaly Remediation (1/6/2025 - 10/31/2025) MLV 47-3AT to MLV 47-3A: Anomaly Remediation (9/1/2025 - 9/5/2025)

MLV 48-3 to MLV 49-3: Anomaly Remediation (9/1/2025 - 9/5/2025) MLV 49-1 to MLV 50-1: Anomaly Remediation (3/4/2025 - 10/31/2025)

MLV 53-2BREH to MLV 53-2BR: Special Permit Replacement (9/1/2025 - 10/15/2025)

MLV 54-1D TO MLV 63-1S: Pig Runs - Cleaning / Gauge 9/16/25 (9/16/2025) MLV 54-1D TO MLV 63-1S: Pig Runs - CLP / IMU 9/18/25 (9/18/2025)

MLV 54-1D TO MLV 63-1S: Pig Runs - MFL-C 9/23/25 (9/23/2025) MLV 54-1D TO MLV 63-1S: Pig Runs - MFL-C 9/25/25 (9/25/2025)

Sta 47: Annual ESD Test (9/10/2025)

Sta 54 Greenville: Annual ESD Test & Maintenance (9/8/2025 - 9/11/2025)

Station 63

(segment 163 FH)

 

1,233

1160

(73)

1160

(73)

1160

(73)

1160

(73)

MLV 84-3 to MLV 85-3: Anomaly Remediation (8/25/2025 - 9/26/2025)

Station 823

(segment 823 BH)

 

686

 

686

 

686

 

686

 

686

 

Station 834

(segment 834 BH)

 

679

670

(9)

670

(9)

670

(9)

670

(9)

Sta 834: Unit 6A - Overhaul (3/3/2025 - 11/3/2025)

Station 534 South of Pool (segment 530

BH)

 

1,820

 

1798

(22)

 

1798

(22)

 

1798

(22)

 

1798

(22)

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

MLV 548

(segment 542 BH)

 

1,597

1455

(142)

1560

(37)

1560

(37)

 

1,597

MLV 541-1 to MLV 541-1A: Anomaly Remediation (8/19/2025 - 9/7/2025) Sta 546: Unit 1A - Engine and Compressor Overhaul (8/11/2025 - 9/15/2025)

 

 

Station 860

(segment 548 BH)

 

 

 

1,516

 

 

 

1445

(71)

 

 

 

1275

(241)

 

 

 

1500

(16)

 

 

 

1500

(16)

Sta 550: Unit 2A - Compressor Overhaul (8/25/2025 - 10/17/2025)

Sta 555 Collinwood: Annual ESD Test & Maintenance (9/8/2025 - 9/12/2025) Sta 555: Unit 1B - Vibration System Upgrade (9/8/2025 - 9/12/2025)

Sta 555: Unit 2A - Engine Maintenance (9/1/2025 - 9/5/2025) Sta 555: Unit 2A - Oil Seal (9/1/2025 - 9/5/2025)

Sta 555: Unit 5A - Engine Maintenance (9/1/2025 - 9/5/2025) Sta 555: Unit 6A - Engine Maintenance (9/1/2025 - 9/5/2025)

Station 860 North (Segment 860

BH)

 

1,793

 

1693

(100)

 

1693

(100)

 

1693

(100)

 

1693

(100)

Sta 860: Force Majeure (8/18/2023 - TBD)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2024 - 12/31/2025)


 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

September 2025 (updated 06/26/25)

 

-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

(9/1 - 9/7)

Week 2

(9/8 - 9/14)

Week 3

(9/15 - 9/21)

Week 4

(9/22 - 9/28)

 

Primary Outage(s)

 

Est. Operational Capacity (Operational Impact) - Thousand Dth

 

 

 

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

 

 

2285

(360)

 

 

 

 

 

 

 

 

2285

(360)

 

 

 

 

 

 

 

 

2285

(360)

 

 

 

 

 

 

 

 

1550

(1095)

MLV 106-1D to MLV 111-7BR: Make Piggable Valve MLV 107-7 & MLV 109-7 Replacements (M) (9/1/2025 - 9/19/2025)

MLV 108-3 to MLV 109-3A: Special Permit Pipe Replacement (9/22/2025 - 10/24/2025)

MLV 109-3 to MLV 109-3A: Class Change Pipe Replacement (9/22/2025 - 10/24/2025)

MLV 109-5 to MLV 109-5A: Class Change Pipe Replacement (9/22/2025 - 10/24/2025)

MLV 866-1 to MLV 867-1: Anomaly Remediation (9/22/2025 - 10/10/2025) MLV 868-1 to MLV 869-1: Anomaly Remediation (9/22/2025 - 10/10/2025) MLV 869-1 to MLV 870-1: Anomaly Remediation (9/22/2025 - 10/10/2025) MLV 871-2 to MLV 871-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 871-2A to MLV 872-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 872-2 to MLV 873-2: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (7/28/2025 - 9/29/2025) MLV 96-5 to MLV 102-5: Pig Runs - Cleaning / Gauge 9/25/25 (9/25/2025)

Sta 96: Unit 2D - Compressor Valves (9/22/2025 - 9/26/2025)

Station 114

(segment 114 BH)

 

920

 

920

 

920

850

(70)

 

920

Sta 118A Tyler Mountain: Annual ESD Test (9/16/2025 - 9/18/2025)

 

 

Station 204

(Segment 204 BH)

 

 

 

1,827

 

 

 

1741

(86)

 

 

 

1797

(30)

 

 

 

1797

(30)

 

 

 

1408

(419)

MLV 205-2 to MLV 206-2: Special Permit Replacement (7/1/2025 - 9/1/2025) MLV 213-2A to MLV 214-2: Special Permit Replacement (9/1/2025 - 10/31/2025) MLV 216-2 to MLV 216-2A: Class Change Replacement (7/1/2025 - 9/1/2025) Sta 204: Scrubber Filter (9/22/2025 - 9/24/2025)

Sta 209 Cambridge: Scrubber Filter (9/25/2025 - 9/27/2025)

Station 237

(segment 237 FH)

 

1,017

557

(460)

557

(460)

 

1,017

 

1,017

MLV 236-1 to MLV 237-1BR: Special Permit Replacement (M) (8/11/2025 - 9/12/2025)

Station 245

(segment 245 FH)

 

997

 

997

855

(142)

925

(72)

925

(72)

Sta 241: Unit 3A - C3 Cooper Upgrade (9/8/2025 - 9/27/2025) Sta 245: Unit 1C - Engine Exchange (9/8/2025 - 9/12/2025)

 

Station 254

(segment 256 FH)

 

 

1,213

 

920

(293)

 

920

(293)

 

920

(293)

 

455

(758)

MLV 254-1 to MLV 261-1: Pig Run - Maintenance (9/23/2025) MLV 254-2 to MLV 261-2: Pig Run - Maintenance (9/24/2025) MLV 254-3 to MLV 258-3: Pig Run - Maintenance (9/25/2025)

Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/8/2025 - 11/1/2025)

Station 261 Suction (segment 260

FH)

 

1,159

 

1,159

 

1,159

 

1,159

 

635

(524)

Sta 260A Southwick: Annual ESD Test (9/23/2025)

Station 261 Discharge East (segment 261

FH)

 

941

 

941

 

941

 

400

(541)

 

545

(396)

Sta 261 Agawam: Annual ESD Test (M) (9/16/2025 - 9/18/2025) Sta 264 Charlton: Annual ESD Test (9/25/2025)

Station 267 South (segment 266

FH)

 

469

 

312

(157)

 

312

(157)

 

312

(157)

 

312

(157)

Sta. 267: Bldg A Controls Upgrade (9/2/2025 - 11/26/2025)

Station 313 Discharge (segment 399

FH)

 

806

 

806

 

806

 

806

 

408

(398)

Sta 313: Unit 1C - Capacitor Replacement (9/22/2025 - 9/26/2025)

Station 315

(segment 315 BH)

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

MLV 324

(segment 324 FH)

 

1,767

 

1,767

 

1,767

 

1,767

 

1,767

 

Station 405 HC Line (segment 299

FH)

 

803

 

803

 

803

 

803

 

803

 

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.