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Tennessee Gas Pipeline Notice 395471

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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:  08/07/2025 4:10:03PM Notice End Date/Time:  08/08/2025 9:00:00am
Post Date/Time:  8/7/2025 4:10:03 PM Notice ID: 395471
Reqrd Rsp:  1 Rsp Date:  08/07/2025
Notice Stat Desc:  INITIATE Prior Notice: 
Subject:  TGP Outage Impact Report
Notice Text:

 

 

 

 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

 

TGP - Outage Impact Report

 

 

 

-Major impact restrictions may be necessary

 

 

Seven Day Forecast (updated 08/07/25)

 

 

-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

(8/11)

Tuesday

(8/12)

Wednesday

(8/13)

Thursday

(8/14)

Friday

(8/15)

Saturday

(8/16)

Sunday

(8/17)

 

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

396

(60)

396

(60)

396

(60)

396

(60)

396

(60)

 

456

 

456

MLV 407-1 TO MLV 408-1: Immediate Anomaly Remediation (7/28/2025 - 8/15/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

 

1,028

 

1,028

 

1,028

 

1,028

 

1,028

 

1,028

 

1,028

 

Station 17

(segment 117 FH)

 

758

740

(18)

740

(18)

740

(18)

740

(18)

740

(18)

740

(18)

740

(18)

MLV 17-2D to MLV 20-2A: Anomaly Remediation (8/11/2025 - 8/16/2025)

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

700

(14)

700

(14)

700

(14)

700

(14)

700

(14)

700

(14)

700

(14)

Sta 25: Unit 1C - VFD Replacement (7/16/2025 - 10/31/2026)

 

Station 40 South

(segment 132 FH)

 

 

912

 

887

(25)

 

887

(25)

 

887

(25)

 

887

(25)

 

887

(25)

 

907

(5)

 

907

(5)

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)

Sta 32: Unit 3B - Compressor Overhaul (4/14/2025 - 8/22/2025)

Station 40 North

(segment 140 FH)

 

1,176

 

1,176

 

1,176

951

(225)

951

(225)

951

(225)

951

(225)

951

(225)

Sta 40: HP Replacement - Bldg C Mod (8/13/2025 - 8/18/2025)

 

 

Station 47

(segment 143 FH)

 

 

 

1,177

 

 

677

(500)

 

 

677

(500)

 

 

677

(500)

 

 

677

(500)

 

 

677

(500)

 

 

1167

(10)

 

 

1172

(5)

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 52-2 to MLV 53-2: Anomaly Remediation (8/4/2025 - 8/15/2025) MLV 53-3 to MLV 53-3CR: Anomaly Remediation (8/4/2025 - 8/22/2025) MLV 55-2 to MLV 56-6: Anomaly Remediation (8/5/2025 - 8/16/2025) MLV 56-2 to MLV 57-2: Anomaly Remediation (8/5/2025 - 8/16/2025)

Sta 54: Substation Inspection (8/11/2025 - 8/15/2025)

Station 63

(segment 163 FH)

 

1,233

 

1,233

 

1,233

1140

(93)

 

1,233

 

1,233

 

1,233

 

1,233

MLV 71-1D to MLV 77-1A: Pig Re-Runs - MDS 8/13/25 (8/13/2025)

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)

 

 

1,798

 

1570

(228)

 

1570

(228)

 

1570

(228)

 

1570

(228)

 

1570

(228)

 

1776

(22)

 

1776

(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)

Sta 534: Unit 6A - Piston Liner & Unloader Replacements (3/25/2025 - 8/29/2025)

Sta 534: Unit 7A - Startup Sequence (5/20/2025 - 8/15/2025)

Station 542

(segment 539 BH)

 

1,756

1746

(10)

1746

(10)

1746

(10)

1746

(10)

1746

(10)

1746

(10)

1746

(10)

 

MLV 548

(segment 542 BH)

 

1,597

 

1305

(292)

 

1305

(292)

 

1305

(292)

 

1305

(292)

 

1305

(292)

 

1540

(57)

 

1540

(57)

Sta 542: Unit 1A - Oil System (7/24/2025 - 8/22/2025)

Sta 546: Annual ESD Tests, Scrubber filter Inspections, Changing Unit Valves (8/7/2025 - 8/15/2025)

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

Station 860

(segment 548 BH)

 

1,516

1280

(236)

1280

(236)

1315

(201)

1315

(201)

1315

(201)

 

1,516

 

1,516

Sta 546: Unit 7A - Metal in Oil (7/14/2025 - 8/15/2025)

Sta 550: Unit 4A - Turbocharger Exchange (6/2/2025 - 8/12/2025) Sta 555: Unit 1B - Install New PLC Program (8/11/2025 - 8/15/2025)

 

Station 860 North

(Segment 860 BH)

 

 

1,793

 

1690

(103)

 

1705

(88)

 

1705

(88)

 

1705

(88)

 

1705

(88)

 

1705

(88)

 

1705

(88)

MLV 560-2 to MLV 561-2: Class Change Pipe Replacement (6/9/2025 - 9/16/2025)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2024 - 12/31/2025) Sta 860: Unit 1B - Electronic Bearing System (8/5/2025 - 8/11/2025)

 

 

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

MLV 101-5 to MLV 102-5: Class Change Pipe Replacement (7/30/2025 - 8/30/2025)

MLV 109-5 to MLV 109-5A: Class Change Pipe Replacement (8/11/2025 - 9/2/2025)

MLV 872-1 to MLV 873-1: Anomaly Remediation (8/4/2025 - 8/23/2025) MLV 875-1 to MLV 876-1R: Anomaly Remediation (8/4/2025 - 8/23/2025) MLV 93-3 to MLV 94-3: HDD River Crossing Replacement (7/14/2025 - 9/13/2025)

MLV 96-4 to MLV 98-4: Immediate Anomaly Remediation (7/9/2025 - 9/12/2025) Sta 106: Unit 1C - Replace Power Cylinder Bearing #7 (4/14/2025 - 8/29/2025) Sta 87: Unit 2D - Oil Cooler Cleaning/Repair (7/30/2025 - 8/15/2025)

Sta 871: Unit 1A - Turbocharger Replacement (8/11/2025 - 8/14/2025)

Station 114

(segment 114 BH)

 

920

 

920

 

920

 

920

 

920

 

920

 

920

 

920

 

 

 

 

 

Station 204

(Segment 204 BH)

 

 

 

 

 

1,827

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

MLV 204-2 to MLV 200-2: Pig Runs - Residual 8/14/25 (M) (8/14/2025) MLV 205-2 to MLV 206-2: Special Permit Replacement (7/16/2025 - 9/1/2025)

MLV 209-3 to MLV 210-3: Anomaly Remediation (7/18/2025 - 8/16/2025) MLV 214-4BL to MLV 213-4BR: Installing Side Valves (8/4/2025 - 8/11/2025) MLV 216-2 to MLV 216-2A: Class Change Replacement (8/12/2025 - 9/9/2025) Sta 204: Unit 11A - Bearing Fuses - Suction Painting (8/11/2025 - 8/14/2025)

Sta 214: Station Outage - Install Side Valves (7/16/2025 - 8/11/2025)

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-204 (8/5/2025 - 9/27/2025)


 

 

 

 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

 

TGP - Outage Impact Report

 

 

 

-Major impact restrictions may be necessary

 

 

Seven Day Forecast (updated 08/07/25)

 

 

-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

(8/11)

Tuesday

(8/12)

Wednesday

(8/13)

Thursday

(8/14)

Friday

(8/15)

Saturday

(8/16)

Sunday

(8/17)

 

Primary Outage(s) that may Impact Throughput

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 219 South (Segment 217

BH)

 

1,638

 

1438

(200)

 

1438

(200)

 

1438

(200)

 

1438

(200)

 

1438

(200)

 

1438

(200)

 

1438

(200)

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-217 (8/4/2025 -

9/27/2025)

 

Station 245

(segment 245 FH)

 

 

997

 

 

840

(157)

 

 

840

(157)

 

 

840

(157)

 

 

840

(157)

 

 

840

(157)

 

 

997

 

 

997

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 241: Unit 3A - Device and Relief Valve Tests (8/13/2025 - 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)

920

(293)

920

(293)

920

(293)

Sta 254: Unit 4A - Replace Power Cylinder Head (5/16/2025 - 11/1/2025) Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/14/2025 - 11/1/2025)

Station 261 Discharge East (segment 261 FH)

 

941

 

941

 

941

 

941

 

941

 

941

 

941

 

941

 

Station 307

(segment 307 BH)

 

1,148

780

(368)

780

(368)

780

(368)

780

(368)

780

(368)

780

(368)

 

1,148

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)

Station 315

(segment 315 BH)

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

MLV 324

(segment 324 FH)

 

1,767

1200

(567)

1200

(567)

1200

(567)

1200

(567)

1200

(567)

1200

(567)

 

1,767

MLV 327-2B to MLV 328-2: Anomaly Remediation (8/11/2025 - 8/16/2025)

Station 405 HC Line (segment 299 FH)

 

803

 

803

 

803

 

803

 

803

 

803

 

803

 

803

 

Station 224

(segment 224 FH)

 

389

200

(189)

200

(189)

200

(189)

200

(189)

200

(189)

200

(189)

200

(189)

Sta 229: Automation Upgrade & Maintenance (8/11/2025 - 9/3/2025)

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 08/07/25)

 

-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

 

MLV 406

(segment 406 BH)

 

456

 

 

396

(60)

396

(60)

MLV 406-1 to MLV 407-1: Immediate Anomaly Remediation (8/18/2025 -

9/5/2025)

Station 1

(segment 101 BH)

 

400

 

 

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

 

 

 

1,028

 

1,028

 

Station 17

(segment 117 FH)

 

758

 

 

740

(18)

 

758

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

 

 

 

634

(80)

 

709

(5)

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

9/6/2025)

Sta 25: Bldg D - Electrical Inspections (8/18/2025 - 8/21/2025) Sta 25: Unit 1C - VFD Replacement (7/16/2025 - 10/31/2026)

Station 40 South

(segment 132 FH)

 

912

 

 

907

(5)

 

912

Sta 32: Unit 3B - Compressor Overhaul (4/14/2025 - 8/22/2025)

Station 40 KN South (segment 501 FH)

 

268

 

 

 

200

(68)

 

200

(68)

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

Station 40 North

(segment 140 FH)

 

1,176

 

 

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

 

 

 

 

1172

(5)

 

 

867

(310)

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 53-3 to MLV 53-3CR: Anomaly Remediation (8/4/2025 - 8/22/2025) MLV 53-3BR to MLV 54-3BL: HydroTest (8/25/2025 - 10/4/2025)

Sta 54: Unit 6B - Power Overhaul (8/18/2025 - 9/5/2025) Sta 54: Unit 6B - Powerside Overhaul (8/18/2025 - 9/5/2025)

Sta 54: Unit 8B - Power Overhaul (8/18/2025 - 9/5/2025)

Station 63

(segment 163 FH)

 

1,233

 

 

 

1,233

663

(570)

MLV 83-3B to MLV 84-3: Class Change Pipe Replacement (8/25/2025 -

9/10/2025)

Sta 63 Batesville: Annual ESD Test (8/26/2025 - 8/27/2025)

Station 823

(segment 823 BH)

 

686

 

 

515

(171)

 

686

Station 827 (Alexandria): Station Recycle Valve (8/19/2025 - 8/21/2025)

Station 834

(segment 834 BH)

 

679

 

 

670

(9)

670

(9)

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

Station 847

(segment 847 BH)

 

284

 

 

250

(34)

 

284

Sta 847 Coffeeville: Annual ESD Test (8/18/2025 - 8/19/2025)

Sta 847: Sub-Station Transformer Inspection and Motor Cleaning (8/18/2025 - 8/19/2025)

Station 534 South of Pool (segment 530 BH)

 

1,798

 

 

 

1776

(22)

 

1776

(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)

Sta 534: Unit 6A - Piston Liner & Unloader Replacements (3/25/2025 - 8/29/2025)

Station 542

(segment 539 BH)

 

1,756

 

 

1746

(10)

 

1,756

 

MLV 548

(segment 542 BH)

 

1,597

 

 

 

1245

(352)

 

1405

(192)

MLV 539-1 to MLV 540-1: Shallow Pipe Lowering (8/18/2025 - 8/30/2025)

Sta 538 Heidelberg: Station ESD Test (8/21/2025) Sta 542: Unit 1A - Oil System (7/24/2025 - 8/22/2025)

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

Station 860

(segment 548 BH)

 

1,516

 

 

1200

(316)

1500

(16)

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

MLV 550-2 TO MLV 546-2: Pig Runs - EMAT 8/22/25 (8/22/2025)

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

Station 860 North (Segment 860 BH)

 

1,793

 

 

 

1705

(88)

 

1705

(88)

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

9/16/2025)

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

 

August 2025 (updated 08/07/25)

 

-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 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

 

2370

(275)

MLV 101-5 to MLV 102-5: Class Change Pipe Replacement (7/30/2025 - 8/30/2025)

MLV 109-5 to MLV 109-5A: Class Change Pipe Replacement (8/11/2025 - 9/2/2025)

MLV 872-1 to MLV 873-1: Anomaly Remediation (8/4/2025 - 8/23/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (8/25/2025 - 10/4/2025) MLV 875-1 to MLV 876-1R: Anomaly Remediation (8/4/2025 - 8/23/2025) MLV 93-3 to MLV 94-3: HDD River Crossing Replacement (7/14/2025 - 9/13/2025)

MLV 96-4 to MLV 98-4: Immediate Anomaly Remediation (7/9/2025 - 9/12/2025) Sta 106: Unit 1C - Replace Power Cylinder Bearing #7 (4/14/2025 - 8/29/2025) Sta 106: Unit 2D - Solar 4K/8K Inspection (8/26/2025 - 8/28/2025)

Sta 87: Unit 1D - Oil Cooler Cleaning/Repair (8/18/2025 - 9/4/2025)

Station 114

(segment 114 BH)

 

920

 

 

 

920

780

(140)

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

 

 

 

 

 

 

 

 

Station 204

(Segment 204 BH)

 

 

 

 

 

 

 

 

 

1,827

 

 

 

 

 

 

 

 

 

 

1325

(502)

 

 

 

 

 

 

 

 

1325

(502)

MLV 204-2 to MLV 200-2: Pig Runs - Cleaning / Gauge 8/19/25 (M) (8/19/2025)

MLV 204-2 to MLV 200-2: Pig Runs - Hard Spot 8/28/25 (M) (8/28/2025) MLV 204-2 to MLV 200-2: Pig Runs - MFL-A 8/25/25 (M) (8/25/2025)

MLV 204-2 to MLV 200-2: Pig Runs - Rosen Caliper/IMU 8/21/25 (M) (8/21/2025) MLV 205-2 to MLV 206-2: Special Permit Replacement (7/16/2025 - 9/1/2025) MLV 210-3 to MLV 211-3: Anomaly Remediation (8/18/2025 - 8/30/2025)

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 (8/12/2025 - 9/9/2025) Sta 204: Unit 12A - Bearing Fuses - Suction Painting (8/18/2025 - 8/21/2025) Sta 209: Unit 12A - Install Barring Jack (8/18/2025 - 8/21/2025)

Sta 209: Unit 7A - Install F/W Turbo (8/25/2025 - 8/28/2025)

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-204 (8/5/2025 - 9/27/2025)

Station 219 South (Segment 217 BH)

 

1,638

 

 

 

1438

(200)

 

1438

(200)

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-217 (8/4/2025 -

9/27/2025)

Station 245

(segment 245 FH)

 

997

 

 

 

997

 

997

 

Station 254

(segment 256 FH)

 

1,213

 

 

920

(293)

920

(293)

Sta 254: Unit 4A - Replace Power Cylinder Head (5/16/2025 - 11/1/2025)

Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/14/2025 - 11/1/2025)

Station 261 Discharge East (segment 261 FH)

 

941

 

 

 

941

 

941

 

Station 261

MLV 263

(segment 261 FH)

 

941

 

 

 

625

(316)

 

625

(316)

MLV 263-2 to 264-2: Pipe Replacement (8/19/2025 - 8/30/2025)

Fitchburg Lat to Gloucester (segment 268 FH)

 

202

 

 

 

185

(17)

 

140

(62)

MLV 267-1A to MLV 268-1: Anomaly Remediation (8/25/2025 - 8/30/2025)

MLV 270-1A to MLV 270-101.1R: Anomaly Remediation (8/18/2025 - 8/23/2025)

Station 307

(segment 307 BH)

 

1,148

 

 

833

(315)

960

(188)

Sta 219: Annual ESD Test (8/18/2025 - 8/22/2025)

Sta 307 (Pigeon ): Annual ESD Test (8/25/2025 - 8/29/2025) Sta 313 Coudersport: Annual ESD Test (8/19/2025 - 8/21/2025)

Station 315

(segment 315 BH)

 

1,854

 

 

 

1,854

 

1,854

 

Station 317

(segment 317 BH)

 

1,579

 

 

1375

(204)

 

1,579

Sta 317: Annual ESD Test (8/19/2025 - 8/20/2025)

MLV 324

(segment 324 FH)

 

1,767

 

 

 

1,767

 

1,767

 


 

 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

August 2025 (updated 08/07/25)

 

-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 405 HC Line (segment 299 FH)

 

803

 

 

 

803

 

803

 

Station 224

(segment 224 FH)

 

389

 

 

200

(189)

200

(189)

Sta 229: Automation Upgrade & Maintenance (8/11/2025 - 9/3/2025)

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

 

September 2025 (updated 08/07/25)

 

-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

 

396

(60)

 

406

(50)

 

406

(50)

 

416

(40)

MLV 403-1 to MLV 404-1: Anomaly Remediation (M) (9/22/2025 - 10/10/2025)

MLV 405-1 to MLV 406-1: Immediate Anomaly Remediation (9/8/2025 - 9/19/2025)

MLV 406-1 to MLV 407-1: Immediate Anomaly Remediation (8/18/2025 - 9/5/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

 

445

(583)

 

445

(583)

 

1,028

 

1,028

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

MLV 17-2S to MLV 9-2D: Pig Runs - Cleaning Run 2 (M) (9/5/2025) MLV 17-2S to MLV 9-2D: Pig Runs - MFL (M) (9/11/2025)

MLV 17-2S to MLV 9-2D: Pigging Cleaning Run 1 (M) (9/3/2025)

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

650

(64)

650

(64)

650

(64)

650

(64)

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

9/6/2025)

Sta 25: Unit 1C - VFD Replacement (7/16/2025 - 10/31/2026)

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

(108)

 

323

 

323

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

 

 

 

 

 

 

 

 

Station 47

(segment 143 FH)

 

 

 

 

 

 

 

 

 

1,222

 

 

 

 

 

 

 

 

 

722

(500)

 

 

 

 

 

 

 

 

 

722

(500)

 

 

 

 

 

 

 

 

 

812

(410)

 

 

 

 

 

 

 

 

 

812

(410)

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 53-3BR to MLV 54-3BL: HydroTest (8/25/2025 - 10/4/2025)

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) Sta 54: Unit 6B - Power Overhaul (8/18/2025 - 9/5/2025)

Sta 54: Unit 6B - Powerside Overhaul (8/18/2025 - 9/5/2025) Sta 54: Unit 8B - Power Overhaul (8/18/2025 - 9/5/2025)

Station 63

(segment 163 FH)

 

1,233

 

1145

(88)

 

1145

(88)

 

1200

(33)

 

1200

(33)

MLV 83-3B to MLV 84-3: Class Change Pipe Replacement (8/25/2025 -

9/10/2025)

MLV 84-1 to MLV 85-1: Class Change Pipe Replacement (9/11/2025 - 10/4/2025)

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

 

215

(69)

 

284

MLV 838-1 TO MLV 834-1: Pig Re-Runs - ROSEN EMAT 9/18 (M) (9/18/2025)

MLV 838-1 TO MLV 834-1: Pig Runs - Cleaning 9/15 - 9/17 (M) (9/15/2025 - 9/17/2025)

Station 527

(segment 527 BH)

 

2,392

 

2,392

 

2,392

 

2,392

2380

(12)

MLV 530-1 TO MLV 531-1: Anomaly Remedition (9/22/2025 - 9/27/2025)

Station 534 South of Pool (segment 530 BH)

 

1,798

 

1776

(22)

 

1776

(22)

 

1776

(22)

 

1776

(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)


 

 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

September 2025 (updated 08/07/25)

 

-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

MLV 548

(segment 542 BH)

 

1,597

 

1560

(37)

 

1560

(37)

 

1210

(387)

 

1210

(387)

MLV 540-1 to MLV 540-1A: Anomaly Remediation (9/16/2025 - 9/27/2025) MLV 540-1 to MLV 540-1A: Shallow Pipe Lowering (9/16/2025 - 9/22/2025) MLV 541-1 to MLV 541-1A: Anomaly Remediation (9/16/2025 - 9/27/2025) Sta 546: Unit 1A - Engine and Compressor Overhaul (8/11/2025 - 9/15/2025)

 

 

Station 860

(segment 548 BH)

 

 

 

1,516

 

 

1390

(126)

 

 

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 1A - Engine Maintenance (9/1/2025 - 9/5/2025)

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 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

 

 

 

 

1705

(88)

 

 

 

 

1210

(583)

 

 

 

 

1705

(88)

 

 

 

 

1780

(13)

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

9/16/2025)

MLV 861-1 to MLV 862-1: Install New 30" Valve 861-1A (9/22/2025 - 10/3/2025)

Sta 563: Unit 1A - Annual Inspection & Safety Device Check (9/11/2025 - 9/14/2025)

Sta 563: Unit 2A - Overhaul Inspection & Safety Device Check (9/8/2025 - 9/11/2025)

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

 

 

 

 

 

 

 

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

 

 

 

 

 

 

2005

(640)

 

 

 

 

 

 

 

 

 

 

 

 

2210

(435)

 

 

 

 

 

 

 

 

 

 

 

 

1990

(655)

 

 

 

 

 

 

 

 

 

 

 

 

1980

(665)

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 109-3: Special Permit Pipe Replacement (9/24/2025 - 10/15/2025)

MLV 109-5 to MLV 109-5A: Class Change Pipe Replacement (8/11/2025 - 9/2/2025)

MLV 871-2A to MLV 872-2: Anomaly Remediation (9/22/2025 - 9/27/2025) MLV 871-2L to MLV 871-2A: Anomaly Remediation (9/28/2025 - 10/4/2025) MLV 872-2 to MLV 873-2: Anomaly Remediation (9/15/2025 - 9/20/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (8/25/2025 - 10/4/2025) MLV 93-3 to MLV 94-3: HDD River Crossing Replacement (7/14/2025 - 9/13/2025)

MLV 96-4 to MLV 98-4: Immediate Anomaly Remediation (7/9/2025 - 9/12/2025) MLV 96-5 to MLV 102-5: Pig Runs - Cleaning / Gauge 9/25/25 (9/25/2025) Sta 106 Clay City: Upgrade B Building Jacket Water System (9/15/2025 -

10/3/2025)

Sta 106: Unit 1D - Solar 4K/8K Inspection (9/22/2025 - 9/26/2025) Sta 87: Unit 1D - Oil Cooler Cleaning/Repair (8/18/2025 - 9/4/2025) Sta 87: Unit 1E - Turbocharger Replacement (9/2/2025 - 10/10/2025) Sta 871: Unit 1A - 3Q Engine Inspection (9/9/2025)

Sta 871: Unit 2A - 3Q Engine Inspection (9/10/2025) Sta 875: Unit 1A - 4K/8K Inspection (9/9/2025 - 9/11/2025)

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

 

 

 

 

1325

(502)

 

 

 

 

1325

(502)

 

 

 

 

1325

(502)

 

 

 

 

1325

(502)

MLV 205-2 to MLV 206-2: Special Permit Replacement (7/16/2025 - 9/1/2025)

MLV 213-2A to MLV 214-2: Special Permit Replacement (9/23/2025 - 10/31/2025)

MLV 216-2 to MLV 216-2A: Class Change Replacement (8/12/2025 - 9/9/2025) Sta 204: Scrubber Filter (9/22/2025 - 9/24/2025)

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

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-204 (8/5/2025 - 9/27/2025)

Station 219 South (Segment 217 BH)

 

1,638

 

1438

(200)

 

1438

(200)

 

1438

(200)

 

1438

(200)

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-217 (8/4/2025 -

9/27/2025)

Station 245

(segment 245 FH)

 

997

840

(157)

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)

Sta 249: Unit 2B - Replace Compressor Rod Packing (9/2/2025 - 9/4/2025)


 

 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

September 2025 (updated 08/07/25)

 

-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 254

(segment 256 FH)

 

 

1,213

 

 

920

(293)

 

 

920

(293)

 

 

920

(293)

 

 

710

(503)

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: Unit 4A - Replace Power Cylinder Head (5/16/2025 - 11/1/2025) Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/14/2025 - 11/1/2025)

N Hampton Lat (segment 280

FH)

 

40

 

40

 

40

 

40

30

(10)

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

Station 261 Discharge East (segment 261 FH)

 

941

 

941

 

941

 

590

(351)

 

585

(356)

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 307

(segment 307 BH)

 

1,148

 

1,148

 

1,148

 

1,148

 

1,148

 

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

 

 

Station 317

(segment 317 BH)

 

 

1,579

 

 

1,579

 

1555

(24)

 

1550

(29)

 

 

1,579

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

(M) (9/16/2025 - 9/17/2025)

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

(M) (9/18/2025 - 9/19/2025)

Sta 317: Unit 1B - Engine Maintenace (9/9/2025 - 9/12/2025)

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

 

Station 224

(segment 224 FH)

 

389

200

(189)

 

389

 

389

 

389

Sta 229: Automation Upgrade & Maintenance (8/11/2025 - 9/3/2025)

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

 

October 2025 (updated 08/07/25)

 

 

-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

(9/29 - 10/5)

Week 2

(10/6 - 10/12)

Week 3

(10/13 - 10/19)

Week 4

(10/20 - 10/26)

Week 5

(10/27 - 11/2)

 

Primary Outage(s)

 

Station 409A (Alamo) (segment 492 FH)

 

274

 

274

 

274

 

134

(140)

 

274

 

274

MLV 409A-901 to MLV 409A-902: Pig Run - Cleaning 10/14/25 (10/14/2025) MLV 409A-901 to MLV 409A-902: Pig Run - Cleaning 10/15/25 (10/15/2025) MLV 409A-901 to MLV 409A-902: Pig Run - MFL-A 10/16/25 (10/16/2025)

Station 409 (Donna Line) (segment 490 FH)

 

564

 

504

(60)

 

564

 

564

 

564

 

564

Sta 409: Unit 3A - Engine Inspection (9/29/2025 - 10/3/2025)

 

MLV 406

(segment 406 BH)

 

 

456

 

 

416

(40)

 

 

416

(40)

 

 

211

(245)

 

 

456

 

 

456

MLV 400-1 to MLV 409-1: Pig Run - Maintenance Cleaning 10/14/25 (M) (10/14/2025)

MLV 400-2 to MLV 409-2: Pig Run - Maintenance Cleaning 10/16/25 (M) (10/16/2025)

MLV 403-1 to MLV 404-1: Anomaly Remediation (M) (9/22/2025 - 10/10/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

400

 

 

 

Station 9

(segment 109 BH)

 

 

 

1,028

 

 

 

1,028

 

 

 

1,028

 

 

 

1,028

 

 

 

638

(390)

 

 

 

1,028

MLV 5-2 to MLV 1-2D: Pig Runs - Maintenance Cleaning 10/23 (M) (10/23/2025) MLV 9-1S and MLV 1-1D: Pig Run - Maintenance Cleaning 10/21 (M) (10/21/2025)

MLV 9-2 to MLV 5-2: Pig Runs - Maintenance Cleaning 10/23 (M) (10/23/2025) MLV 9-3 to MLV 4-3: Pig Runs - Maintenance Cleaning 10/22 (M) (10/22/2025)

Station 17

(segment 117 FH)

 

758

 

758

 

758

753

(5)

753

(5)

753

(5)

MLV 17-1D to MLV 20-1A: Anomaly Remediation (10/13/2025 - 10/31/2025)

Station 25

(segment 125 FH)

 

714

700

(14)

700

(14)

700

(14)

700

(14)

700

(14)

MLV 26-1 Relocation: Highway 59 Widening (10/6/2025 - 11/2/2025)

MLV 26-1 to MLV 27-1: Install Road Casing (10/6/2025 - 11/2/2025) Sta 25: Unit 1C - VFD Replacement (7/16/2025 - 10/31/2026)

Station 40 South

(segment 132 FH)

 

912

 

777

(135)

 

777

(135)

 

777

(135)

 

637

(275)

 

747

(165)

MLV 32-2D TO MLV 40-2S: Pig Runs - Maintenance (10/28/2025) MLV 32-3D to MLV 40-3S: Pig Runs - Maintenance (10/21/2025)

MLV 39-1 to MLV 40-1S: Anomaly Remediation (10/7/2025 - 10/20/2025) MLV 39-2 to MLV 40-2S: Anomaly Remediation (9/23/2025 - 10/6/2025)

Station 40 KN South (segment 501 FH)

 

268

 

268

 

268

 

268

 

268

 

175

(93)

Sta 500-1 to Sta 823 (MLV 507-1): Pig Run - Maintenance (M) (10/29/2025)

 

 

 

Station 47

(segment 143 FH)

 

 

 

 

1,226

 

 

 

 

851

(375)

 

 

 

 

1221

(5)

 

 

 

 

1221

(5)

 

 

 

 

1216

(10)

 

 

 

 

1126

(100)

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 49-1 to MLV 50-1: Anomaly Remediation (3/4/2025 - 10/31/2025) MLV 51-3 to MLV 52-3: Anomaly Remediation (10/22/2025 - 11/14/2025) MLV 53-2BREH to MLV 53-2BR: Special Permit Replacement (9/1/2025 - 10/15/2025)

MLV 53-3BR to MLV 54-3BL: HydroTest (8/25/2025 - 10/4/2025)

Sta 47: Unit 1D - Flush & Clean Cooling Systems (10/20/2025 - 10/24/2025) Sta 47: Unit 2D - Flush & Clean Cooling Systems (10/20/2025 - 10/24/2025)

 

 

Station 63

(segment 163 FH)

 

 

 

1,233

 

 

1200

(33)

 

 

1160

(73)

 

 

1160

(73)

 

 

1160

(73)

 

 

845

(388)

MLV 63-4D to MLV 71-4S: Pig Runs - Caliper / IMU 10/30/25 (10/30/2025) MLV 63-4D to MLV 71-4S: Pig Runs - Cleaning / Gauge 10/28/25 (10/28/2025) MLV 84-1 to MLV 85-1: Class Change Pipe Replacement (9/11/2025 - 10/4/2025)

MLV 84-4 to MLV 85-4: Class Change Pipe Replacement (10/6/2025 - 10/25/2025)

Station 87

100 Leg

(segment 163 BH)

 

1,439

 

1300

(139)

 

1300

(139)

 

1300

(139)

 

1310

(129)

 

1310

(129)

MLV 83-3 to MLV 83-3B: Install Backpressure Regulator (10/1/2025 - 10/15/2025)

MLV 83-4 to MLV 83-4B: Install Backpressure Regulator (10/16/2025 - 10/31/2025)

Station 823

(segment 823 BH)

 

686

 

686

 

686

 

686

 

686

 

686

 

Station 834

(segment 834 BH)

 

679

590

(89)

670

(9)

670

(9)

670

(9)

664

(15)

Sta 834: Annual ESD Test (9/29/2025)

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

 

Station 847

(segment 847 BH)

 

 

284

 

260

(24)

 

 

284

 

160

(124)

 

160

(124)

 

 

284

MLV 856-1 to MLV 860-1: Pig Runs - Cal / IMU 10/21/25 (10/21/2025)

MLV 856-1 to MLV 860-1: Pig Runs - Cleaning / Gauge 10/16/25 (10/16/2025) MLV 856-1 to MLV 860-1: Pig Runs - MFL-C 10/23/25 (10/23/2025)

Sta 836A: Annual ESD Test (9/30/2025)

Station 823 Muskrat Line (segment 509 BH)

 

124

 

90

(34)

 

124

 

124

 

124

 

124

Sta 823 to MLV 516: Pig Run - Maintenance (M) (10/1/2025)

Station 534 South of Pool (segment 530 BH)

 

1,798

 

1776

(22)

 

1776

(22)

 

1776

(22)

 

1776

(22)

 

1776

(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)


 

 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

TGP - Outage Impact Report

 

 

-Major impact restrictions may be necessary

 

October 2025 (updated 08/07/25)

 

 

-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

(9/29 - 10/5)

Week 2

(10/6 - 10/12)

Week 3

(10/13 - 10/19)

Week 4

(10/20 - 10/26)

Week 5

(10/27 - 11/2)

 

Primary Outage(s)

 

MLV 548

(segment 542 BH)

 

1,597

720

(877)

720

(877)

1580

(17)

1580

(17)

1562

(35)

MLV 540-2 to MLV 540-2A: Shallow Pipe Lowering (9/30/2025 - 10/7/2025)

Sta 546: Unit 4A - Engine and Compressor Overhaul (9/29/2025 - 11/7/2025)

Station 860

(segment 548 BH)

 

1,516

1500

(16)

1500

(16)

1440

(76)

1500

(16)

1500

(16)

Sta 550: Unit 2A - Compressor Overhaul (8/25/2025 - 10/17/2025) Sta 550: Unit 3A - Engine Overhaul (10/13/2025 - 11/15/2025)

Sta 550: Unit 3A - Turbocharger Exchange (10/27/2025 - 11/7/2025)

Station 860 North

(Segment 860 BH)

 

1,793

 

1780

(13)

 

1780

(13)

 

1780

(13)

 

1780

(13)

 

1780

(13)

MLV 861-1 to MLV 862-1: Install New 30" Valve 861-1A (9/22/2025 - 10/3/2025)

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

 

 

 

 

 

 

 

 

 

 

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2310

(335)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2190

(455)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1860

(785)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1670

(975)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1670

(975)

MLV 106-1 to MLV 111-7: Pig Runs - AFD Combo 10/14/25 (10/14/2025)

MLV 106-1 to MLV 111-7: Pig Runs - Cleaning / Gauge 10/9/25 (10/9/2025) MLV 106-1 to MLV 111-7: Pig Runs - EMAT 10/16/25 (10/16/2025)

MLV 108-2 to MLV 109-2: Special Permit Pipe Replacement (M) (11/1/2025 - 11/30/2025)

MLV 108-3 to MLV 109-3: Special Permit Pipe Replacement (9/24/2025 - 10/15/2025)

MLV 109-2 to 109-2A: Special Permit Pipe Replacement (10/16/2025 - 10/31/2025)

MLV 109-3 to MLV 109-3A: Class Change Pipe Replacement (10/16/2025 - 10/31/2025)

MLV 866-1 to MLV 867-1: Anomaly Remediation (10/21/2025 - 11/26/2025) MLV 868-1 to MLV 869-1: Anomaly Remediation (10/21/2025 - 11/26/2025) MLV 868-2 to MLV 869-2: Anomaly Remediation (10/27/2025 - 11/1/2025) MLV 869-1 to MLV 870-1: Anomaly Remediation (10/21/2025 - 11/26/2025) MLV 870-1 to MLV 870-1R: Anomaly Remediation (10/21/2025 - 11/26/2025) MLV 870-2 to MLV 870-2R: Anomaly Remediation (10/21/2025 - 10/25/2025) MLV 871-2L to MLV 871-2A: Anomaly Remediation (9/28/2025 - 10/4/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (8/25/2025 - 10/4/2025) MLV 90-3 to MLV 91-3: HDD River Crossing Replacement (10/16/2025 - 10/27/2025)

MLV 96-5 to MLV 102-5: Pig Runs - AFD Combo 9/30/25 (9/30/2025) MLV 96-5 to MLV 102-5: Pig Runs - EMAT 10/2/25 (10/2/2025)

Sta 106 Clay City: Upgrade B Building Jacket Water System (9/15/2025 - 10/3/2025)

Sta 87 Portland: Annual ESD Test (10/14/2025 - 10/15/2025) Sta 87: Unit 1E - Turbocharger Replacement (9/2/2025 - 10/10/2025)

Sta 87: Unit 2E - Turbocharger Replacement (10/13/2025 - 11/26/2025)

Station 114

(segment 114 BH)

 

920

 

920

850

(70)

 

920

 

920

 

920

Sta 118A: Unit 1A - Turbine Exchange (10/6/2025 - 10/10/2025)

Station 204

(Segment 204 BH)

 

1,827

 

1797

(30)

 

1797

(30)

 

1797

(30)

 

1797

(30)

 

1411

(416)

MLV 209-4 to MLV 204-4: Pig Runs - Cleaning / Gauge 10/30/25 (10/30/2025) MLV 213-2A to MLV 214-2: Special Permit Replacement (9/23/2025 - 10/31/2025)

Station 237 West

(segment 233 FH)

 

475

 

200

(275)

 

200

(275)

 

1,017

 

1,017

 

1,017

MLV 236-1 to MLV 237-1BR: Special Permit Replacement (M) (9/29/2025 - 10/10/2025)

Station 245

(segment 245 FH)

 

997

850

(147)

850

(147)

850

(147)

850

(147)

850

(147)

Sta 241: Unit 1B - 2K Maintenance (10/7/2025 - 10/8/2025) Sta 241: Unit 2B - 2K Maintenance (10/9/2025 - 10/10/2025)

Sta 249: Unit 1A - Aftercooler Upgrade (10/1/2025 - 10/31/2025)

Station 254

(segment 256 FH)

 

1,213

920

(293)

920

(293)

920

(293)

920

(293)

920

(293)

Sta 254: Unit 4A - Replace Power Cylinder Head (5/16/2025 - 11/1/2025) Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/14/2025 - 11/1/2025)

Station 261 Discharge East (segment 261 FH)

 

941

 

941

 

930

(11)

 

941

 

941

 

941

Sta 261: Unit 4A - Compressor Rod Packing (M) (10/6/2025 - 10/9/2025)

Station 267 South (segment 266 FH)

 

469

 

312

(157)

 

312

(157)

 

312

(157)

 

312

(157)

 

312

(157)

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

Station 307

(segment 307 BH)

 

1,150

 

1,150

 

1,150

 

1,150

 

1,150

 

1,150

 

Station 315

(segment 315 BH)

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

Station 321

(segment 321 FH)

 

2,102

 

1850

(252)

 

1240

(862)

 

1240

(862)

 

1240

(862)

 

2,102

MLV 320-2A to MLV 322-2: Drip Removal 321-2-1 (M) (10/7/2025 - 10/20/2025)

Sta 323: Unit 1A - Drive Modernization Upgrade (9/29/2025 - 10/3/2025) Sta. 323A Lackawaxen: Annual ESD Testing (9/29/2025 - 9/30/2025)

MLV 324

(segment 324 FH)

 

1,767

 

1,767

 

1,767

 

1,767

 

1,767

 

1,767

 


 

 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

TGP - Outage Impact Report

 

 

-Major impact restrictions may be necessary

 

October 2025 (updated 08/07/25)

 

 

-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

(9/29 - 10/5)

Week 2

(10/6 - 10/12)

Week 3

(10/13 - 10/19)

Week 4

(10/20 - 10/26)

Week 5

(10/27 - 11/2)

 

Primary Outage(s)

 

Station 405 HC Line (segment 299 FH)

 

803

 

803

 

803

 

690

(113)

 

803

 

803

Sta 405A: Unit 1A - 8K Solar Turbine Borescope Inspection (10/15/2025) Sta 405A: Unit 1A - Water Wash (10/14/2025)

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.

 

TSP/TSP Name:  1939164-TENNESSEE GAS PIPELINE Critical: Y
Notice Type Desc (1):  MAINTENANCE Notice Type Desc (2):  MAINTENANCE
Notice Eff Date/Time:  08/07/2025 4:10:03PM Notice End Date/Time:  08/08/2025 9:00:00am
Post Date/Time:  8/7/2025 4:10:03 PM Notice ID: 395471
Reqrd Rsp:  1 Rsp Date:  08/07/2025
Notice Stat Desc:  INITIATE Prior Notice: 
Subject:  TGP Outage Impact Report
Notice Text:

 

 

 

 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

 

TGP - Outage Impact Report

 

 

 

-Major impact restrictions may be necessary

 

 

Seven Day Forecast (updated 08/07/25)

 

 

-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

(8/11)

Tuesday

(8/12)

Wednesday

(8/13)

Thursday

(8/14)

Friday

(8/15)

Saturday

(8/16)

Sunday

(8/17)

 

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

396

(60)

396

(60)

396

(60)

396

(60)

396

(60)

 

456

 

456

MLV 407-1 TO MLV 408-1: Immediate Anomaly Remediation (7/28/2025 - 8/15/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

 

1,028

 

1,028

 

1,028

 

1,028

 

1,028

 

1,028

 

1,028

 

Station 17

(segment 117 FH)

 

758

740

(18)

740

(18)

740

(18)

740

(18)

740

(18)

740

(18)

740

(18)

MLV 17-2D to MLV 20-2A: Anomaly Remediation (8/11/2025 - 8/16/2025)

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

700

(14)

700

(14)

700

(14)

700

(14)

700

(14)

700

(14)

700

(14)

Sta 25: Unit 1C - VFD Replacement (7/16/2025 - 10/31/2026)

 

Station 40 South

(segment 132 FH)

 

 

912

 

887

(25)

 

887

(25)

 

887

(25)

 

887

(25)

 

887

(25)

 

907

(5)

 

907

(5)

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)

Sta 32: Unit 3B - Compressor Overhaul (4/14/2025 - 8/22/2025)

Station 40 North

(segment 140 FH)

 

1,176

 

1,176

 

1,176

951

(225)

951

(225)

951

(225)

951

(225)

951

(225)

Sta 40: HP Replacement - Bldg C Mod (8/13/2025 - 8/18/2025)

 

 

Station 47

(segment 143 FH)

 

 

 

1,177

 

 

677

(500)

 

 

677

(500)

 

 

677

(500)

 

 

677

(500)

 

 

677

(500)

 

 

1167

(10)

 

 

1172

(5)

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 52-2 to MLV 53-2: Anomaly Remediation (8/4/2025 - 8/15/2025) MLV 53-3 to MLV 53-3CR: Anomaly Remediation (8/4/2025 - 8/22/2025) MLV 55-2 to MLV 56-6: Anomaly Remediation (8/5/2025 - 8/16/2025) MLV 56-2 to MLV 57-2: Anomaly Remediation (8/5/2025 - 8/16/2025)

Sta 54: Substation Inspection (8/11/2025 - 8/15/2025)

Station 63

(segment 163 FH)

 

1,233

 

1,233

 

1,233

1140

(93)

 

1,233

 

1,233

 

1,233

 

1,233

MLV 71-1D to MLV 77-1A: Pig Re-Runs - MDS 8/13/25 (8/13/2025)

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)

 

 

1,798

 

1570

(228)

 

1570

(228)

 

1570

(228)

 

1570

(228)

 

1570

(228)

 

1776

(22)

 

1776

(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)

Sta 534: Unit 6A - Piston Liner & Unloader Replacements (3/25/2025 - 8/29/2025)

Sta 534: Unit 7A - Startup Sequence (5/20/2025 - 8/15/2025)

Station 542

(segment 539 BH)

 

1,756

1746

(10)

1746

(10)

1746

(10)

1746

(10)

1746

(10)

1746

(10)

1746

(10)

 

MLV 548

(segment 542 BH)

 

1,597

 

1305

(292)

 

1305

(292)

 

1305

(292)

 

1305

(292)

 

1305

(292)

 

1540

(57)

 

1540

(57)

Sta 542: Unit 1A - Oil System (7/24/2025 - 8/22/2025)

Sta 546: Annual ESD Tests, Scrubber filter Inspections, Changing Unit Valves (8/7/2025 - 8/15/2025)

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

Station 860

(segment 548 BH)

 

1,516

1280

(236)

1280

(236)

1315

(201)

1315

(201)

1315

(201)

 

1,516

 

1,516

Sta 546: Unit 7A - Metal in Oil (7/14/2025 - 8/15/2025)

Sta 550: Unit 4A - Turbocharger Exchange (6/2/2025 - 8/12/2025) Sta 555: Unit 1B - Install New PLC Program (8/11/2025 - 8/15/2025)

 

Station 860 North

(Segment 860 BH)

 

 

1,793

 

1690

(103)

 

1705

(88)

 

1705

(88)

 

1705

(88)

 

1705

(88)

 

1705

(88)

 

1705

(88)

MLV 560-2 to MLV 561-2: Class Change Pipe Replacement (6/9/2025 - 9/16/2025)

Sta 860: Unit 1A - Aftercooler Jacket Water Inspection (6/17/2024 - 12/31/2025) Sta 860: Unit 1B - Electronic Bearing System (8/5/2025 - 8/11/2025)

 

 

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

2255

(390)

MLV 101-5 to MLV 102-5: Class Change Pipe Replacement (7/30/2025 - 8/30/2025)

MLV 109-5 to MLV 109-5A: Class Change Pipe Replacement (8/11/2025 - 9/2/2025)

MLV 872-1 to MLV 873-1: Anomaly Remediation (8/4/2025 - 8/23/2025) MLV 875-1 to MLV 876-1R: Anomaly Remediation (8/4/2025 - 8/23/2025) MLV 93-3 to MLV 94-3: HDD River Crossing Replacement (7/14/2025 - 9/13/2025)

MLV 96-4 to MLV 98-4: Immediate Anomaly Remediation (7/9/2025 - 9/12/2025) Sta 106: Unit 1C - Replace Power Cylinder Bearing #7 (4/14/2025 - 8/29/2025) Sta 87: Unit 2D - Oil Cooler Cleaning/Repair (7/30/2025 - 8/15/2025)

Sta 871: Unit 1A - Turbocharger Replacement (8/11/2025 - 8/14/2025)

Station 114

(segment 114 BH)

 

920

 

920

 

920

 

920

 

920

 

920

 

920

 

920

 

 

 

 

 

Station 204

(Segment 204 BH)

 

 

 

 

 

1,827

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

 

 

 

 

 

1325

(502)

MLV 204-2 to MLV 200-2: Pig Runs - Residual 8/14/25 (M) (8/14/2025) MLV 205-2 to MLV 206-2: Special Permit Replacement (7/16/2025 - 9/1/2025)

MLV 209-3 to MLV 210-3: Anomaly Remediation (7/18/2025 - 8/16/2025) MLV 214-4BL to MLV 213-4BR: Installing Side Valves (8/4/2025 - 8/11/2025) MLV 216-2 to MLV 216-2A: Class Change Replacement (8/12/2025 - 9/9/2025) Sta 204: Unit 11A - Bearing Fuses - Suction Painting (8/11/2025 - 8/14/2025)

Sta 214: Station Outage - Install Side Valves (7/16/2025 - 8/11/2025)

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-204 (8/5/2025 - 9/27/2025)


 

 

 

 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

 

TGP - Outage Impact Report

 

 

 

-Major impact restrictions may be necessary

 

 

Seven Day Forecast (updated 08/07/25)

 

 

-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

(8/11)

Tuesday

(8/12)

Wednesday

(8/13)

Thursday

(8/14)

Friday

(8/15)

Saturday

(8/16)

Sunday

(8/17)

 

Primary Outage(s) that may Impact Throughput

Est. Operational Capacity (Operational Impact) - Thousand Dth

Station 219 South (Segment 217

BH)

 

1,638

 

1438

(200)

 

1438

(200)

 

1438

(200)

 

1438

(200)

 

1438

(200)

 

1438

(200)

 

1438

(200)

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-217 (8/4/2025 -

9/27/2025)

 

Station 245

(segment 245 FH)

 

 

997

 

 

840

(157)

 

 

840

(157)

 

 

840

(157)

 

 

840

(157)

 

 

840

(157)

 

 

997

 

 

997

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 241: Unit 3A - Device and Relief Valve Tests (8/13/2025 - 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)

920

(293)

920

(293)

920

(293)

Sta 254: Unit 4A - Replace Power Cylinder Head (5/16/2025 - 11/1/2025) Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/14/2025 - 11/1/2025)

Station 261 Discharge East (segment 261 FH)

 

941

 

941

 

941

 

941

 

941

 

941

 

941

 

941

 

Station 307

(segment 307 BH)

 

1,148

780

(368)

780

(368)

780

(368)

780

(368)

780

(368)

780

(368)

 

1,148

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)

Station 315

(segment 315 BH)

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

MLV 324

(segment 324 FH)

 

1,767

1200

(567)

1200

(567)

1200

(567)

1200

(567)

1200

(567)

1200

(567)

 

1,767

MLV 327-2B to MLV 328-2: Anomaly Remediation (8/11/2025 - 8/16/2025)

Station 405 HC Line (segment 299 FH)

 

803

 

803

 

803

 

803

 

803

 

803

 

803

 

803

 

Station 224

(segment 224 FH)

 

389

200

(189)

200

(189)

200

(189)

200

(189)

200

(189)

200

(189)

200

(189)

Sta 229: Automation Upgrade & Maintenance (8/11/2025 - 9/3/2025)

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 08/07/25)

 

-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

 

MLV 406

(segment 406 BH)

 

456

 

 

396

(60)

396

(60)

MLV 406-1 to MLV 407-1: Immediate Anomaly Remediation (8/18/2025 -

9/5/2025)

Station 1

(segment 101 BH)

 

400

 

 

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

 

 

 

1,028

 

1,028

 

Station 17

(segment 117 FH)

 

758

 

 

740

(18)

 

758

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

 

 

 

634

(80)

 

709

(5)

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

9/6/2025)

Sta 25: Bldg D - Electrical Inspections (8/18/2025 - 8/21/2025) Sta 25: Unit 1C - VFD Replacement (7/16/2025 - 10/31/2026)

Station 40 South

(segment 132 FH)

 

912

 

 

907

(5)

 

912

Sta 32: Unit 3B - Compressor Overhaul (4/14/2025 - 8/22/2025)

Station 40 KN South (segment 501 FH)

 

268

 

 

 

200

(68)

 

200

(68)

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

Station 40 North

(segment 140 FH)

 

1,176

 

 

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

 

 

 

 

1172

(5)

 

 

867

(310)

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 53-3 to MLV 53-3CR: Anomaly Remediation (8/4/2025 - 8/22/2025) MLV 53-3BR to MLV 54-3BL: HydroTest (8/25/2025 - 10/4/2025)

Sta 54: Unit 6B - Power Overhaul (8/18/2025 - 9/5/2025) Sta 54: Unit 6B - Powerside Overhaul (8/18/2025 - 9/5/2025)

Sta 54: Unit 8B - Power Overhaul (8/18/2025 - 9/5/2025)

Station 63

(segment 163 FH)

 

1,233

 

 

 

1,233

663

(570)

MLV 83-3B to MLV 84-3: Class Change Pipe Replacement (8/25/2025 -

9/10/2025)

Sta 63 Batesville: Annual ESD Test (8/26/2025 - 8/27/2025)

Station 823

(segment 823 BH)

 

686

 

 

515

(171)

 

686

Station 827 (Alexandria): Station Recycle Valve (8/19/2025 - 8/21/2025)

Station 834

(segment 834 BH)

 

679

 

 

670

(9)

670

(9)

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

Station 847

(segment 847 BH)

 

284

 

 

250

(34)

 

284

Sta 847 Coffeeville: Annual ESD Test (8/18/2025 - 8/19/2025)

Sta 847: Sub-Station Transformer Inspection and Motor Cleaning (8/18/2025 - 8/19/2025)

Station 534 South of Pool (segment 530 BH)

 

1,798

 

 

 

1776

(22)

 

1776

(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)

Sta 534: Unit 6A - Piston Liner & Unloader Replacements (3/25/2025 - 8/29/2025)

Station 542

(segment 539 BH)

 

1,756

 

 

1746

(10)

 

1,756

 

MLV 548

(segment 542 BH)

 

1,597

 

 

 

1245

(352)

 

1405

(192)

MLV 539-1 to MLV 540-1: Shallow Pipe Lowering (8/18/2025 - 8/30/2025)

Sta 538 Heidelberg: Station ESD Test (8/21/2025) Sta 542: Unit 1A - Oil System (7/24/2025 - 8/22/2025)

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

Station 860

(segment 548 BH)

 

1,516

 

 

1200

(316)

1500

(16)

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

MLV 550-2 TO MLV 546-2: Pig Runs - EMAT 8/22/25 (8/22/2025)

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

Station 860 North (Segment 860 BH)

 

1,793

 

 

 

1705

(88)

 

1705

(88)

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

9/16/2025)

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

 

August 2025 (updated 08/07/25)

 

-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 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

 

 

 

2255

(390)

 

 

 

 

 

 

 

2370

(275)

MLV 101-5 to MLV 102-5: Class Change Pipe Replacement (7/30/2025 - 8/30/2025)

MLV 109-5 to MLV 109-5A: Class Change Pipe Replacement (8/11/2025 - 9/2/2025)

MLV 872-1 to MLV 873-1: Anomaly Remediation (8/4/2025 - 8/23/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (8/25/2025 - 10/4/2025) MLV 875-1 to MLV 876-1R: Anomaly Remediation (8/4/2025 - 8/23/2025) MLV 93-3 to MLV 94-3: HDD River Crossing Replacement (7/14/2025 - 9/13/2025)

MLV 96-4 to MLV 98-4: Immediate Anomaly Remediation (7/9/2025 - 9/12/2025) Sta 106: Unit 1C - Replace Power Cylinder Bearing #7 (4/14/2025 - 8/29/2025) Sta 106: Unit 2D - Solar 4K/8K Inspection (8/26/2025 - 8/28/2025)

Sta 87: Unit 1D - Oil Cooler Cleaning/Repair (8/18/2025 - 9/4/2025)

Station 114

(segment 114 BH)

 

920

 

 

 

920

780

(140)

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

 

 

 

 

 

 

 

 

Station 204

(Segment 204 BH)

 

 

 

 

 

 

 

 

 

1,827

 

 

 

 

 

 

 

 

 

 

1325

(502)

 

 

 

 

 

 

 

 

1325

(502)

MLV 204-2 to MLV 200-2: Pig Runs - Cleaning / Gauge 8/19/25 (M) (8/19/2025)

MLV 204-2 to MLV 200-2: Pig Runs - Hard Spot 8/28/25 (M) (8/28/2025) MLV 204-2 to MLV 200-2: Pig Runs - MFL-A 8/25/25 (M) (8/25/2025)

MLV 204-2 to MLV 200-2: Pig Runs - Rosen Caliper/IMU 8/21/25 (M) (8/21/2025) MLV 205-2 to MLV 206-2: Special Permit Replacement (7/16/2025 - 9/1/2025) MLV 210-3 to MLV 211-3: Anomaly Remediation (8/18/2025 - 8/30/2025)

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 (8/12/2025 - 9/9/2025) Sta 204: Unit 12A - Bearing Fuses - Suction Painting (8/18/2025 - 8/21/2025) Sta 209: Unit 12A - Install Barring Jack (8/18/2025 - 8/21/2025)

Sta 209: Unit 7A - Install F/W Turbo (8/25/2025 - 8/28/2025)

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-204 (8/5/2025 - 9/27/2025)

Station 219 South (Segment 217 BH)

 

1,638

 

 

 

1438

(200)

 

1438

(200)

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-217 (8/4/2025 -

9/27/2025)

Station 245

(segment 245 FH)

 

997

 

 

 

997

 

997

 

Station 254

(segment 256 FH)

 

1,213

 

 

920

(293)

920

(293)

Sta 254: Unit 4A - Replace Power Cylinder Head (5/16/2025 - 11/1/2025)

Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/14/2025 - 11/1/2025)

Station 261 Discharge East (segment 261 FH)

 

941

 

 

 

941

 

941

 

Station 261

MLV 263

(segment 261 FH)

 

941

 

 

 

625

(316)

 

625

(316)

MLV 263-2 to 264-2: Pipe Replacement (8/19/2025 - 8/30/2025)

Fitchburg Lat to Gloucester (segment 268 FH)

 

202

 

 

 

185

(17)

 

140

(62)

MLV 267-1A to MLV 268-1: Anomaly Remediation (8/25/2025 - 8/30/2025)

MLV 270-1A to MLV 270-101.1R: Anomaly Remediation (8/18/2025 - 8/23/2025)

Station 307

(segment 307 BH)

 

1,148

 

 

833

(315)

960

(188)

Sta 219: Annual ESD Test (8/18/2025 - 8/22/2025)

Sta 307 (Pigeon ): Annual ESD Test (8/25/2025 - 8/29/2025) Sta 313 Coudersport: Annual ESD Test (8/19/2025 - 8/21/2025)

Station 315

(segment 315 BH)

 

1,854

 

 

 

1,854

 

1,854

 

Station 317

(segment 317 BH)

 

1,579

 

 

1375

(204)

 

1,579

Sta 317: Annual ESD Test (8/19/2025 - 8/20/2025)

MLV 324

(segment 324 FH)

 

1,767

 

 

 

1,767

 

1,767

 


 

 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

August 2025 (updated 08/07/25)

 

-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 405 HC Line (segment 299 FH)

 

803

 

 

 

803

 

803

 

Station 224

(segment 224 FH)

 

389

 

 

200

(189)

200

(189)

Sta 229: Automation Upgrade & Maintenance (8/11/2025 - 9/3/2025)

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

 

September 2025 (updated 08/07/25)

 

-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

 

396

(60)

 

406

(50)

 

406

(50)

 

416

(40)

MLV 403-1 to MLV 404-1: Anomaly Remediation (M) (9/22/2025 - 10/10/2025)

MLV 405-1 to MLV 406-1: Immediate Anomaly Remediation (9/8/2025 - 9/19/2025)

MLV 406-1 to MLV 407-1: Immediate Anomaly Remediation (8/18/2025 - 9/5/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

Station 9

(segment 109 BH)

 

1,028

 

445

(583)

 

445

(583)

 

1,028

 

1,028

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

MLV 17-2S to MLV 9-2D: Pig Runs - Cleaning Run 2 (M) (9/5/2025) MLV 17-2S to MLV 9-2D: Pig Runs - MFL (M) (9/11/2025)

MLV 17-2S to MLV 9-2D: Pigging Cleaning Run 1 (M) (9/3/2025)

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

650

(64)

650

(64)

650

(64)

650

(64)

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

9/6/2025)

Sta 25: Unit 1C - VFD Replacement (7/16/2025 - 10/31/2026)

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

(108)

 

323

 

323

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

 

 

 

 

 

 

 

 

Station 47

(segment 143 FH)

 

 

 

 

 

 

 

 

 

1,222

 

 

 

 

 

 

 

 

 

722

(500)

 

 

 

 

 

 

 

 

 

722

(500)

 

 

 

 

 

 

 

 

 

812

(410)

 

 

 

 

 

 

 

 

 

812

(410)

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 53-3BR to MLV 54-3BL: HydroTest (8/25/2025 - 10/4/2025)

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) Sta 54: Unit 6B - Power Overhaul (8/18/2025 - 9/5/2025)

Sta 54: Unit 6B - Powerside Overhaul (8/18/2025 - 9/5/2025) Sta 54: Unit 8B - Power Overhaul (8/18/2025 - 9/5/2025)

Station 63

(segment 163 FH)

 

1,233

 

1145

(88)

 

1145

(88)

 

1200

(33)

 

1200

(33)

MLV 83-3B to MLV 84-3: Class Change Pipe Replacement (8/25/2025 -

9/10/2025)

MLV 84-1 to MLV 85-1: Class Change Pipe Replacement (9/11/2025 - 10/4/2025)

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

 

215

(69)

 

284

MLV 838-1 TO MLV 834-1: Pig Re-Runs - ROSEN EMAT 9/18 (M) (9/18/2025)

MLV 838-1 TO MLV 834-1: Pig Runs - Cleaning 9/15 - 9/17 (M) (9/15/2025 - 9/17/2025)

Station 527

(segment 527 BH)

 

2,392

 

2,392

 

2,392

 

2,392

2380

(12)

MLV 530-1 TO MLV 531-1: Anomaly Remedition (9/22/2025 - 9/27/2025)

Station 534 South of Pool (segment 530 BH)

 

1,798

 

1776

(22)

 

1776

(22)

 

1776

(22)

 

1776

(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)


 

 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

September 2025 (updated 08/07/25)

 

-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

MLV 548

(segment 542 BH)

 

1,597

 

1560

(37)

 

1560

(37)

 

1210

(387)

 

1210

(387)

MLV 540-1 to MLV 540-1A: Anomaly Remediation (9/16/2025 - 9/27/2025) MLV 540-1 to MLV 540-1A: Shallow Pipe Lowering (9/16/2025 - 9/22/2025) MLV 541-1 to MLV 541-1A: Anomaly Remediation (9/16/2025 - 9/27/2025) Sta 546: Unit 1A - Engine and Compressor Overhaul (8/11/2025 - 9/15/2025)

 

 

Station 860

(segment 548 BH)

 

 

 

1,516

 

 

1390

(126)

 

 

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 1A - Engine Maintenance (9/1/2025 - 9/5/2025)

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 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

 

 

 

 

1705

(88)

 

 

 

 

1210

(583)

 

 

 

 

1705

(88)

 

 

 

 

1780

(13)

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

9/16/2025)

MLV 861-1 to MLV 862-1: Install New 30" Valve 861-1A (9/22/2025 - 10/3/2025)

Sta 563: Unit 1A - Annual Inspection & Safety Device Check (9/11/2025 - 9/14/2025)

Sta 563: Unit 2A - Overhaul Inspection & Safety Device Check (9/8/2025 - 9/11/2025)

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

 

 

 

 

 

 

 

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

 

 

 

 

 

 

2005

(640)

 

 

 

 

 

 

 

 

 

 

 

 

2210

(435)

 

 

 

 

 

 

 

 

 

 

 

 

1990

(655)

 

 

 

 

 

 

 

 

 

 

 

 

1980

(665)

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 109-3: Special Permit Pipe Replacement (9/24/2025 - 10/15/2025)

MLV 109-5 to MLV 109-5A: Class Change Pipe Replacement (8/11/2025 - 9/2/2025)

MLV 871-2A to MLV 872-2: Anomaly Remediation (9/22/2025 - 9/27/2025) MLV 871-2L to MLV 871-2A: Anomaly Remediation (9/28/2025 - 10/4/2025) MLV 872-2 to MLV 873-2: Anomaly Remediation (9/15/2025 - 9/20/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (8/25/2025 - 10/4/2025) MLV 93-3 to MLV 94-3: HDD River Crossing Replacement (7/14/2025 - 9/13/2025)

MLV 96-4 to MLV 98-4: Immediate Anomaly Remediation (7/9/2025 - 9/12/2025) MLV 96-5 to MLV 102-5: Pig Runs - Cleaning / Gauge 9/25/25 (9/25/2025) Sta 106 Clay City: Upgrade B Building Jacket Water System (9/15/2025 -

10/3/2025)

Sta 106: Unit 1D - Solar 4K/8K Inspection (9/22/2025 - 9/26/2025) Sta 87: Unit 1D - Oil Cooler Cleaning/Repair (8/18/2025 - 9/4/2025) Sta 87: Unit 1E - Turbocharger Replacement (9/2/2025 - 10/10/2025) Sta 871: Unit 1A - 3Q Engine Inspection (9/9/2025)

Sta 871: Unit 2A - 3Q Engine Inspection (9/10/2025) Sta 875: Unit 1A - 4K/8K Inspection (9/9/2025 - 9/11/2025)

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

 

 

 

 

1325

(502)

 

 

 

 

1325

(502)

 

 

 

 

1325

(502)

 

 

 

 

1325

(502)

MLV 205-2 to MLV 206-2: Special Permit Replacement (7/16/2025 - 9/1/2025)

MLV 213-2A to MLV 214-2: Special Permit Replacement (9/23/2025 - 10/31/2025)

MLV 216-2 to MLV 216-2A: Class Change Replacement (8/12/2025 - 9/9/2025) Sta 204: Scrubber Filter (9/22/2025 - 9/24/2025)

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

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-204 (8/5/2025 - 9/27/2025)

Station 219 South (Segment 217 BH)

 

1,638

 

1438

(200)

 

1438

(200)

 

1438

(200)

 

1438

(200)

Sta 87 to Sta 219: Cumulative Planned/Unplanned Maintenance-217 (8/4/2025 -

9/27/2025)

Station 245

(segment 245 FH)

 

997

840

(157)

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)

Sta 249: Unit 2B - Replace Compressor Rod Packing (9/2/2025 - 9/4/2025)


 

 

 

 

-Primary impact restrictions may be necessary

 

TGP - Outage Impact Report

 

-Major impact restrictions may be necessary

 

September 2025 (updated 08/07/25)

 

-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 254

(segment 256 FH)

 

 

1,213

 

 

920

(293)

 

 

920

(293)

 

 

920

(293)

 

 

710

(503)

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: Unit 4A - Replace Power Cylinder Head (5/16/2025 - 11/1/2025) Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/14/2025 - 11/1/2025)

N Hampton Lat (segment 280

FH)

 

40

 

40

 

40

 

40

30

(10)

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

Station 261 Discharge East (segment 261 FH)

 

941

 

941

 

941

 

590

(351)

 

585

(356)

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 307

(segment 307 BH)

 

1,148

 

1,148

 

1,148

 

1,148

 

1,148

 

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

 

 

Station 317

(segment 317 BH)

 

 

1,579

 

 

1,579

 

1555

(24)

 

1550

(29)

 

 

1,579

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

(M) (9/16/2025 - 9/17/2025)

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

(M) (9/18/2025 - 9/19/2025)

Sta 317: Unit 1B - Engine Maintenace (9/9/2025 - 9/12/2025)

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

 

Station 224

(segment 224 FH)

 

389

200

(189)

 

389

 

389

 

389

Sta 229: Automation Upgrade & Maintenance (8/11/2025 - 9/3/2025)

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

 

October 2025 (updated 08/07/25)

 

 

-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

(9/29 - 10/5)

Week 2

(10/6 - 10/12)

Week 3

(10/13 - 10/19)

Week 4

(10/20 - 10/26)

Week 5

(10/27 - 11/2)

 

Primary Outage(s)

 

Station 409A (Alamo) (segment 492 FH)

 

274

 

274

 

274

 

134

(140)

 

274

 

274

MLV 409A-901 to MLV 409A-902: Pig Run - Cleaning 10/14/25 (10/14/2025) MLV 409A-901 to MLV 409A-902: Pig Run - Cleaning 10/15/25 (10/15/2025) MLV 409A-901 to MLV 409A-902: Pig Run - MFL-A 10/16/25 (10/16/2025)

Station 409 (Donna Line) (segment 490 FH)

 

564

 

504

(60)

 

564

 

564

 

564

 

564

Sta 409: Unit 3A - Engine Inspection (9/29/2025 - 10/3/2025)

 

MLV 406

(segment 406 BH)

 

 

456

 

 

416

(40)

 

 

416

(40)

 

 

211

(245)

 

 

456

 

 

456

MLV 400-1 to MLV 409-1: Pig Run - Maintenance Cleaning 10/14/25 (M) (10/14/2025)

MLV 400-2 to MLV 409-2: Pig Run - Maintenance Cleaning 10/16/25 (M) (10/16/2025)

MLV 403-1 to MLV 404-1: Anomaly Remediation (M) (9/22/2025 - 10/10/2025)

Station 1

(segment 101 BH)

 

400

 

400

 

400

 

400

 

400

 

400

 

 

 

Station 9

(segment 109 BH)

 

 

 

1,028

 

 

 

1,028

 

 

 

1,028

 

 

 

1,028

 

 

 

638

(390)

 

 

 

1,028

MLV 5-2 to MLV 1-2D: Pig Runs - Maintenance Cleaning 10/23 (M) (10/23/2025) MLV 9-1S and MLV 1-1D: Pig Run - Maintenance Cleaning 10/21 (M) (10/21/2025)

MLV 9-2 to MLV 5-2: Pig Runs - Maintenance Cleaning 10/23 (M) (10/23/2025) MLV 9-3 to MLV 4-3: Pig Runs - Maintenance Cleaning 10/22 (M) (10/22/2025)

Station 17

(segment 117 FH)

 

758

 

758

 

758

753

(5)

753

(5)

753

(5)

MLV 17-1D to MLV 20-1A: Anomaly Remediation (10/13/2025 - 10/31/2025)

Station 25

(segment 125 FH)

 

714

700

(14)

700

(14)

700

(14)

700

(14)

700

(14)

MLV 26-1 Relocation: Highway 59 Widening (10/6/2025 - 11/2/2025)

MLV 26-1 to MLV 27-1: Install Road Casing (10/6/2025 - 11/2/2025) Sta 25: Unit 1C - VFD Replacement (7/16/2025 - 10/31/2026)

Station 40 South

(segment 132 FH)

 

912

 

777

(135)

 

777

(135)

 

777

(135)

 

637

(275)

 

747

(165)

MLV 32-2D TO MLV 40-2S: Pig Runs - Maintenance (10/28/2025) MLV 32-3D to MLV 40-3S: Pig Runs - Maintenance (10/21/2025)

MLV 39-1 to MLV 40-1S: Anomaly Remediation (10/7/2025 - 10/20/2025) MLV 39-2 to MLV 40-2S: Anomaly Remediation (9/23/2025 - 10/6/2025)

Station 40 KN South (segment 501 FH)

 

268

 

268

 

268

 

268

 

268

 

175

(93)

Sta 500-1 to Sta 823 (MLV 507-1): Pig Run - Maintenance (M) (10/29/2025)

 

 

 

Station 47

(segment 143 FH)

 

 

 

 

1,226

 

 

 

 

851

(375)

 

 

 

 

1221

(5)

 

 

 

 

1221

(5)

 

 

 

 

1216

(10)

 

 

 

 

1126

(100)

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 49-1 to MLV 50-1: Anomaly Remediation (3/4/2025 - 10/31/2025) MLV 51-3 to MLV 52-3: Anomaly Remediation (10/22/2025 - 11/14/2025) MLV 53-2BREH to MLV 53-2BR: Special Permit Replacement (9/1/2025 - 10/15/2025)

MLV 53-3BR to MLV 54-3BL: HydroTest (8/25/2025 - 10/4/2025)

Sta 47: Unit 1D - Flush & Clean Cooling Systems (10/20/2025 - 10/24/2025) Sta 47: Unit 2D - Flush & Clean Cooling Systems (10/20/2025 - 10/24/2025)

 

 

Station 63

(segment 163 FH)

 

 

 

1,233

 

 

1200

(33)

 

 

1160

(73)

 

 

1160

(73)

 

 

1160

(73)

 

 

845

(388)

MLV 63-4D to MLV 71-4S: Pig Runs - Caliper / IMU 10/30/25 (10/30/2025) MLV 63-4D to MLV 71-4S: Pig Runs - Cleaning / Gauge 10/28/25 (10/28/2025) MLV 84-1 to MLV 85-1: Class Change Pipe Replacement (9/11/2025 - 10/4/2025)

MLV 84-4 to MLV 85-4: Class Change Pipe Replacement (10/6/2025 - 10/25/2025)

Station 87

100 Leg

(segment 163 BH)

 

1,439

 

1300

(139)

 

1300

(139)

 

1300

(139)

 

1310

(129)

 

1310

(129)

MLV 83-3 to MLV 83-3B: Install Backpressure Regulator (10/1/2025 - 10/15/2025)

MLV 83-4 to MLV 83-4B: Install Backpressure Regulator (10/16/2025 - 10/31/2025)

Station 823

(segment 823 BH)

 

686

 

686

 

686

 

686

 

686

 

686

 

Station 834

(segment 834 BH)

 

679

590

(89)

670

(9)

670

(9)

670

(9)

664

(15)

Sta 834: Annual ESD Test (9/29/2025)

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

 

Station 847

(segment 847 BH)

 

 

284

 

260

(24)

 

 

284

 

160

(124)

 

160

(124)

 

 

284

MLV 856-1 to MLV 860-1: Pig Runs - Cal / IMU 10/21/25 (10/21/2025)

MLV 856-1 to MLV 860-1: Pig Runs - Cleaning / Gauge 10/16/25 (10/16/2025) MLV 856-1 to MLV 860-1: Pig Runs - MFL-C 10/23/25 (10/23/2025)

Sta 836A: Annual ESD Test (9/30/2025)

Station 823 Muskrat Line (segment 509 BH)

 

124

 

90

(34)

 

124

 

124

 

124

 

124

Sta 823 to MLV 516: Pig Run - Maintenance (M) (10/1/2025)

Station 534 South of Pool (segment 530 BH)

 

1,798

 

1776

(22)

 

1776

(22)

 

1776

(22)

 

1776

(22)

 

1776

(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)


 

 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

TGP - Outage Impact Report

 

 

-Major impact restrictions may be necessary

 

October 2025 (updated 08/07/25)

 

 

-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

(9/29 - 10/5)

Week 2

(10/6 - 10/12)

Week 3

(10/13 - 10/19)

Week 4

(10/20 - 10/26)

Week 5

(10/27 - 11/2)

 

Primary Outage(s)

 

MLV 548

(segment 542 BH)

 

1,597

720

(877)

720

(877)

1580

(17)

1580

(17)

1562

(35)

MLV 540-2 to MLV 540-2A: Shallow Pipe Lowering (9/30/2025 - 10/7/2025)

Sta 546: Unit 4A - Engine and Compressor Overhaul (9/29/2025 - 11/7/2025)

Station 860

(segment 548 BH)

 

1,516

1500

(16)

1500

(16)

1440

(76)

1500

(16)

1500

(16)

Sta 550: Unit 2A - Compressor Overhaul (8/25/2025 - 10/17/2025) Sta 550: Unit 3A - Engine Overhaul (10/13/2025 - 11/15/2025)

Sta 550: Unit 3A - Turbocharger Exchange (10/27/2025 - 11/7/2025)

Station 860 North

(Segment 860 BH)

 

1,793

 

1780

(13)

 

1780

(13)

 

1780

(13)

 

1780

(13)

 

1780

(13)

MLV 861-1 to MLV 862-1: Install New 30" Valve 861-1A (9/22/2025 - 10/3/2025)

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

 

 

 

 

 

 

 

 

 

 

 

 

 

Station 110

(segment 187 BH)

(south thru Kentucky)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2,645

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2310

(335)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2190

(455)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1860

(785)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1670

(975)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1670

(975)

MLV 106-1 to MLV 111-7: Pig Runs - AFD Combo 10/14/25 (10/14/2025)

MLV 106-1 to MLV 111-7: Pig Runs - Cleaning / Gauge 10/9/25 (10/9/2025) MLV 106-1 to MLV 111-7: Pig Runs - EMAT 10/16/25 (10/16/2025)

MLV 108-2 to MLV 109-2: Special Permit Pipe Replacement (M) (11/1/2025 - 11/30/2025)

MLV 108-3 to MLV 109-3: Special Permit Pipe Replacement (9/24/2025 - 10/15/2025)

MLV 109-2 to 109-2A: Special Permit Pipe Replacement (10/16/2025 - 10/31/2025)

MLV 109-3 to MLV 109-3A: Class Change Pipe Replacement (10/16/2025 - 10/31/2025)

MLV 866-1 to MLV 867-1: Anomaly Remediation (10/21/2025 - 11/26/2025) MLV 868-1 to MLV 869-1: Anomaly Remediation (10/21/2025 - 11/26/2025) MLV 868-2 to MLV 869-2: Anomaly Remediation (10/27/2025 - 11/1/2025) MLV 869-1 to MLV 870-1: Anomaly Remediation (10/21/2025 - 11/26/2025) MLV 870-1 to MLV 870-1R: Anomaly Remediation (10/21/2025 - 11/26/2025) MLV 870-2 to MLV 870-2R: Anomaly Remediation (10/21/2025 - 10/25/2025) MLV 871-2L to MLV 871-2A: Anomaly Remediation (9/28/2025 - 10/4/2025) MLV 873-2 to MLV 873-2A: Anomaly Remediation (8/25/2025 - 10/4/2025) MLV 90-3 to MLV 91-3: HDD River Crossing Replacement (10/16/2025 - 10/27/2025)

MLV 96-5 to MLV 102-5: Pig Runs - AFD Combo 9/30/25 (9/30/2025) MLV 96-5 to MLV 102-5: Pig Runs - EMAT 10/2/25 (10/2/2025)

Sta 106 Clay City: Upgrade B Building Jacket Water System (9/15/2025 - 10/3/2025)

Sta 87 Portland: Annual ESD Test (10/14/2025 - 10/15/2025) Sta 87: Unit 1E - Turbocharger Replacement (9/2/2025 - 10/10/2025)

Sta 87: Unit 2E - Turbocharger Replacement (10/13/2025 - 11/26/2025)

Station 114

(segment 114 BH)

 

920

 

920

850

(70)

 

920

 

920

 

920

Sta 118A: Unit 1A - Turbine Exchange (10/6/2025 - 10/10/2025)

Station 204

(Segment 204 BH)

 

1,827

 

1797

(30)

 

1797

(30)

 

1797

(30)

 

1797

(30)

 

1411

(416)

MLV 209-4 to MLV 204-4: Pig Runs - Cleaning / Gauge 10/30/25 (10/30/2025) MLV 213-2A to MLV 214-2: Special Permit Replacement (9/23/2025 - 10/31/2025)

Station 237 West

(segment 233 FH)

 

475

 

200

(275)

 

200

(275)

 

1,017

 

1,017

 

1,017

MLV 236-1 to MLV 237-1BR: Special Permit Replacement (M) (9/29/2025 - 10/10/2025)

Station 245

(segment 245 FH)

 

997

850

(147)

850

(147)

850

(147)

850

(147)

850

(147)

Sta 241: Unit 1B - 2K Maintenance (10/7/2025 - 10/8/2025) Sta 241: Unit 2B - 2K Maintenance (10/9/2025 - 10/10/2025)

Sta 249: Unit 1A - Aftercooler Upgrade (10/1/2025 - 10/31/2025)

Station 254

(segment 256 FH)

 

1,213

920

(293)

920

(293)

920

(293)

920

(293)

920

(293)

Sta 254: Unit 4A - Replace Power Cylinder Head (5/16/2025 - 11/1/2025) Sta. 254: Bldg A Stack Replacement and Unit Upgrades (7/14/2025 - 11/1/2025)

Station 261 Discharge East (segment 261 FH)

 

941

 

941

 

930

(11)

 

941

 

941

 

941

Sta 261: Unit 4A - Compressor Rod Packing (M) (10/6/2025 - 10/9/2025)

Station 267 South (segment 266 FH)

 

469

 

312

(157)

 

312

(157)

 

312

(157)

 

312

(157)

 

312

(157)

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

Station 307

(segment 307 BH)

 

1,150

 

1,150

 

1,150

 

1,150

 

1,150

 

1,150

 

Station 315

(segment 315 BH)

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

1,854

 

Station 321

(segment 321 FH)

 

2,102

 

1850

(252)

 

1240

(862)

 

1240

(862)

 

1240

(862)

 

2,102

MLV 320-2A to MLV 322-2: Drip Removal 321-2-1 (M) (10/7/2025 - 10/20/2025)

Sta 323: Unit 1A - Drive Modernization Upgrade (9/29/2025 - 10/3/2025) Sta. 323A Lackawaxen: Annual ESD Testing (9/29/2025 - 9/30/2025)

MLV 324

(segment 324 FH)

 

1,767

 

1,767

 

1,767

 

1,767

 

1,767

 

1,767

 


 

 

 

 

 

 

-Primary impact restrictions may be necessary

 

 

TGP - Outage Impact Report

 

 

-Major impact restrictions may be necessary

 

October 2025 (updated 08/07/25)

 

 

-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

(9/29 - 10/5)

Week 2

(10/6 - 10/12)

Week 3

(10/13 - 10/19)

Week 4

(10/20 - 10/26)

Week 5

(10/27 - 11/2)

 

Primary Outage(s)

 

Station 405 HC Line (segment 299 FH)

 

803

 

803

 

803

 

690

(113)

 

803

 

803

Sta 405A: Unit 1A - 8K Solar Turbine Borescope Inspection (10/15/2025) Sta 405A: Unit 1A - Water Wash (10/14/2025)

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.