Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Operation Flow Order - Imbalance
Posted: 03/12/2026 01:08:32 PM
delvid: 16651637
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical: Y
Notice Eff Date: 03/14/2026
Notice Eff Time: 09:00:00 CDT
Notice End Date:
Notice End Time:
Notice ID: 16651637
Notice Stat Desc: Initiate
Notice Type Desc: OFO
Post Date: 03/12/2026
Post Time: 13:08:32 CDT
Prior Notice: 0
Reqrd Rsp Desc: No response required
Rsp Date:
Rsp Time:
TSP: 007933021
TSP Name: TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject: Operation Flow Order - Imbalance
Transco provides notice of limited flexibility to manage imbalances due to recent trends in shipper imbalances and the forecasted temperatures in Zones 5 & 6 where system line pack and storage levels must be maintained for safe and reliable operations. It is recommended that shippers continue to maintain a concurrent balance of receipts and deliveries.
In order to ensure maintenance of line pack and storage levels, Transco is issuing the Operational Flow Order (OFO) as indicated below:
Beginning Gas Day:
Saturday,
March, 14 2026
9:00 AM CT
Monday,
March 16, 2026
9:00 AM CT
Tuesday,
March 17, 2026
9:00 AM CT
Ending Gas Day:
Monday,
March 16, 2026
9:00 AM CT
Tuesday,
March 17, 2026
9:00 AM CT
Wednesday,
March 18, 2026
9:00 AM CT
OFO Area(s):
Zones 5 & 6
Zones 5 & 6
Zone 6
Tariff Reference for OFO Issuance:*
(c),(d)
(c),(d)
(c),(d)
Type of OFO:
Imbalance
Imbalance
Imbalance
Type of Imbalance:
Due To Shipper
Due From Shipper
Due From Shipper
Transactions Include:
Deliveries**
Deliveries**
Deliveries**
Beginning Cycle:
Timely
Timely
Timely
Tolerance % Allowed (or 1000 dth, Zone whichever is greater):
Due To Shipper 5%
Due From Shipper 7%
Due From Shipper 7%
Affected Shipper(s) (DUNS #):****
Affected Location(s) (DRN #/Loc ID):*****
All
All
All
Retro Scheduling Available
Yes
Yes
Yes
OBA Subject to OFO:
No
No
No
If Yes, OBA Parties (DUNS #):***
*Circumstances under which Seller may determine that an OFO must be issued include, but are not limited to in Section 52.2 of Transco's FERC Gas Tariff General Terms and Conditions:
Responding to an event of force majeure;
Accommodating capacity limitations resulting from the need to perform maintenance and/or repairs;
Ensuring current and future storage capabilities and maintenance of line pack;
Maintaining operational pressures and adequate gas supplies required to provide an efficient and reliable firm service;
Responding to any event which Seller believes in its sole judgment may jeopardize the integrity of its system.
** OFO based on all transactions with deliveries in affected OFO area.
***OFO based on all transactions with receipts in affected OFO area.
**** If specific DUNS #s have been identified, only imbalances created by those shippers/OBA parties will be subject to the OFO provisions.
*****If specific DRN #/Loc ID's have been identified, only imbalances created at those location(s) will be subject to the OFO provisions.
This OFO is directed to shippers consistent with Section 52 of Transco's FERC Gas Tariff General Terms and Conditions with a minimum of $50 per dt per day penalty. This OFO will continue until further notice. Buyers with imbalances greater than the allowed tolerance will be subject to penalties specified in Section 52 of Transco's FERC Gas Tariff General Terms and Conditions.
Additional information on Operational Flow Orders is available at this link:
http://www.1line.williams.com/Transco/files/training/Critical_Day.pdf
Please contact your Transportation Services Representative if you have any questions.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Operational Flow Order - Imbalance
Posted: 03/02/2026 06:20:51 AM
delvid: 16618305
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical: Y
Notice Eff Date: 02/28/2026
Notice Eff Time: 09:00:00 CST
Notice End Date: 03/03/2026
Notice End Time: 09:00:00 CST
Notice ID: 16618305
Notice Stat Desc: Supersede
Notice Type Desc: OFO
Post Date: 03/02/2026
Post Time: 06:20:51 CST
Prior Notice: 16604115
Reqrd Rsp Desc: Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP: 007933021
TSP Name: TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject: Operational Flow Order - Imbalance
Transco provides notice of limited flexibility to manage imbalances due to the forecased temperatures in Zone 6 where system line pack and storage levels must be maintained for safe and reliable operations. Transco recommends shippers continue to maintain a concurrent balance of receipts and deliveries.
In order to ensure the integrity of system line pack and storage levels during this weather event, Transco is issuing the Operational Flow Order (OFO) as indicated below.
Beginning Gas Day:
Saturday, February 28, 2026
9:00 AM CT
Sunday, March 1, 2026
9:00 AM CT
Monday, March 2, 2026
9:00 AM CT
Ending Gas Day:
Sunday, March 1, 2026
9:00 AM CT
Monday, March 2, 2026
9:00 AM CT
Wednesday, March 4, 2026
Tuesday, March 3, 2026
9:00 AM CT
OFO Area(s):
Zone 6
Zone 6
Zone 6
Tariff Reference for OFO Issuance:*
(c),(d)
(c),(d)
(c),(d)
Type of OFO:
Imbalance
Imbalance
Imbalance
Type of Imbalance:
Due From Shipper & Due To Shipper
Due From Shipper
Due From Shipper
Transactions Include:
Deliveries**
Deliveries**
Deliveries**
Beginning Cycle:
Timely
Timely
Timely
Tolerance % Allowed (or 1000 dth, Zone whichever is greater):
Due From Shipper 7% &
Due To Shipper 7%
Due From Shipper 7%
Due From Shipper 5%
Affected Shipper(s) (DUNS #):****
Affected Location(s) (DRN #/Loc ID):*****
All
All
All
Retro Scheduling Available
Yes
Yes
Yes
OBA Subject to OFO:
No
No
No
If Yes, OBA Parties (DUNS #):***
*Circumstances under which Seller may determine that an OFO must be issued include, but are not limited to in Section 52.2 of Transco's FERC Gas Tariff General Terms and Conditions:
(a) Responding to an event of force majeure;
(b) Accommodating capacity limitations resulting from the need to perform maintenance and/or repairs;
(c) Ensuring current and future storage capabilities and maintenance of line pack;
(d) Maintaining operational pressures and adequate gas supplies required to provide an efficient and reliable firm service;
(e) Responding to any event which Seller believes in its sole judgment may jeopardize the integrity of its system.
** OFO based on all transactions with deliveries in affected OFO area.
***OFO based on all transactions with receipts in affected OFO area.
**** If specific DUNS #s have been identified, only imbalances created by those shippers/OBA parties will be subject to the OFO provisions.
*****If specific DRN #/Loc ID's have been identified, only imbalances created at those location(s) will be subject to the OFO provisions.
This OFO is directed to shippers consistent with Section 52 of Transco's FERC Gas Tariff General Terms and Conditions with a minimum of $50 per dt per day penalty. This OFO will continue until further notice. Buyers with imbalances greater than the allowed tolerance will be subject to penalties specified in Section 52 of Transco's FERC Gas Tariff General Terms and Conditions.
Additional information on Operational Flow Orders is available at this link:
http://www.1line.williams.com/Transco/files/training/Critical_Day.pdf
Please contact your Transportation Services Representative if you have any questions.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Operation Flow Order - Imbalance
Posted: 07/01/2026 03:18:22 PM
Notice ID: 17019542
Notice 17019542
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/05/2026
Notice Eff Time:
09:00:00 CDT
Notice End Date:
07/06/2026
Notice End Time:
09:00:00 CDT
Notice ID:
17019542
Notice Stat Desc:
Initiate
Notice Type Desc:
OFO
Post Date:
07/01/2026
Post Time:
15:18:22 CDT
Prior Notice:
0
Reqrd Rsp Desc:
No response required
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
Operation Flow Order - Imbalance
Transco provides notice of limited flexibility to manage imbalances. In order to maintain operational pressures and adequate gas supplies required to provide an efficient and reliable firm service, Transco is issuing an Operational Flow Order (OFO) pursuant to Section 52 of its General Terms and Conditions of its Tariff.
Please refer to the table below for the effected zones, dates and tolerance percentages.
Beginning Gas Day:
Sunday,
July 5, 2026
9:00 AM CT
Ending Gas Day:
Monday,
July 6, 2026
9:00 AM CT
OFO Area(s):
Zone 6
Tariff Reference for OFO Issuance:*
(d)
Type of OFO:
Imbalance
Type of Imbalance:
Due To Shipper
Transactions Include:
Deliveries**
Beginning Cycle:
Timely
Tolerance % Allowed (or 1000 dth, Zone whichever is greater):
Due To Shipper 7%
Affected Shipper(s) (DUNS #):****
Affected Location(s) (DRN #/Loc ID):*****
All
Retro Scheduling Available
Yes
OBA Subject to OFO:
No
If Yes, OBA Parties (DUNS #):***
*Circumstances under which Seller may determine that an OFO must be issued include, but are not limited to in Section 52.2 of Transco's FERC Gas Tariff General Terms and Conditions:
Responding to an event of force majeure;
Accommodating capacity limitations resulting from the need to perform maintenance and/or repairs;
Ensuring current and future storage capabilities and maintenance of line pack;
Maintaining operational pressures and adequate gas supplies required to provide an efficient and reliable firm service;
Responding to any event which Seller believes in its sole judgment may jeopardize the integrity of its system.
** OFO based on all transactions with deliveries in affected OFO area.
***OFO based on all transactions with receipts in affected OFO area.
**** If specific DUNS #s have been identified, only imbalances created by those shippers/OBA parties will be subject to the OFO provisions.
*****If specific DRN #/Loc ID's have been identified, only imbalances created at those location(s) will be subject to the OFO provisions.
This OFO is directed to shippers consistent with Section 52 of Transco's FERC Gas Tariff General Terms and Conditions with a minimum of $50 per dt per day penalty. This OFO will continue until further notice. Buyers with imbalances greater than the allowed tolerance will be subject to penalties specified in Section 52 of Transco's FERC Gas Tariff General Terms and Conditions.
Additional information on Operational Flow Orders is available at this link:
http://www.1line.williams.com/Transco/files/training/Critical_Day.pdf
Please contact your Transportation Services Representative if you have any questions.
Transco
Meter Outage McComb & GS Magnolia (Job 130940) 2026 Planned Outage and Maintenance Summary
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Meter Outage McComb & GS Magnolia (Job 130940) 2026 Planned Outage and Maintenance Summary
Posted: 07/08/2026 01:52:39 PM
Notice ID: 17040935
Notice 17040935
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/08/2026
Notice Eff Time:
13:52:39 CDT
Notice End Date:
Notice End Time:
Notice ID:
17040935
Notice Stat Desc:
Initiate
Notice Type Desc:
Maint
Post Date:
07/08/2026
Post Time:
13:52:39 CDT
Prior Notice:
0
Reqrd Rsp Desc:
Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
Meter Outage McComb & GS Magnolia (Job 130940) 2026 Planned Outage and Maintenance Summary
Transco will be performing necessary line outage for integrity assessments between the 65A10 – 65A20 valve sections associated with Job #130940 on its 2026 Planned Outage and Maintenance Summary. The current schedule for this maintenance is
August 18, 2026 through August 24, 2026.
During the maintenance outage, the location(s) identified below will not be available for scheduling or flow:
Location Name
Location ID
Location Type
MCCOMB M4483
1002726
Delivery
GULF SOUTH-MAGNOLIA M4150
1006175
Delivery
If you have any questions, please contact your Transportation Services Representative.
Transco
Station 60 MLA (Job 130950) 2026 Planned Outage and Maintenance Summary
SEV 3/5
Maintenance0.340 Bcf/d7 Days
Transco has scheduled a planned line outage for integrity assessments on Mainline A between valves 60A10 and 60A20 at Station 60 (MP 588.62) from August 4-10, 2026. Available throughput will be reduced from 2,133 MDth/d to 1,793 MDth/d, a reduction of 340 MDth/d (0.340 Bcf/d), representing approximately 16% of design capacity at this TSB. Primary firm shippers face an estimated 0-5% cut based on historical utilization, with an updated Market and Production Area constraint notice to follow.
Transco Station 60 planned maintenance removes 0.340 Bcf/d of southbound-to-northbound capacity for seven days in early August, expect modest basis widening at Transco Zone 4 and downstream Southeast/Mid-Atlantic points relative to Henry Hub with primary firm cuts projected at 0-5%.
Reroute: Limited: Southern Natural Gas (SNG/EGT) provides partial alternative routing for Southeast markets, but Transco is the dominant pipeline in this corridor and SNG capacity is significantly smaller; full offset of 0.340 Bcf/d is unlikely.
View original notice text
Pipeline: Transco
Notice: Station 60 MLA (Job 130950) 2026 Planned Outage and Maintenance Summary
Posted: 07/08/2026 01:48:10 PM
Notice ID: 17040930
Notice 17040930
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/08/2026
Notice Eff Time:
13:48:10 CDT
Notice End Date:
Notice End Time:
Notice ID:
17040930
Notice Stat Desc:
Initiate
Notice Type Desc:
Maint
Post Date:
07/08/2026
Post Time:
13:48:10 CDT
Prior Notice:
0
Reqrd Rsp Desc:
Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
Station 60 MLA (Job 130950) 2026 Planned Outage and Maintenance Summary
Transco will be performing a necessary line outage for integrity assessments between the 60A10 and 60A20 valves on Transco’s Mainline A associated with Job # 130950 on its 2026 Planned Outage and Maintenance Summary. The current schedule for this maintenance is
August 4, 2026 through August 10, 2026
.
The Throughput Section Boundary (TSB) at mainline MP 588.62 (Station 60) will be used to manage capacity availability during this planned work. An updated Market and Production Area constraint notice will include the location and the available quantity of all transportation services during the indicated period.
TSB Name Location
Location ID
Flow Direction
Compressor Station 60 MP 588.62
9000000
South to North
Date
Design Capacity (Mdt/d)
Total Qty Available (Mdt/d)
% Available Total Primary-Firm vs Design Capacity
% Cuts (Primary) Potential Shipper Impact (Based on Historical Utilization)*
Aug 4-10
2,133
1,793
84%
0-5%
*% Cuts is an estimate of the impact to shippers based on historical utilization and anticipated volumes during the time of constraint. These amounts are subject to change based on actual nominated firm volumes and changes in the amount of available capacity.
If you have any questions, please contact your Transportation Services Representative.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Operational Flow Order - Imbalance
Posted: 07/12/2026 03:57:47 PM
Notice ID: 17053238
Notice 17053238
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/14/2026
Notice Eff Time:
09:00:00 CDT
Notice End Date:
07/17/2026
Notice End Time:
09:00:00 CDT
Notice ID:
17053238
Notice Stat Desc:
Initiate
Notice Type Desc:
OFO
Post Date:
07/12/2026
Post Time:
15:57:47 CDT
Prior Notice:
0
Reqrd Rsp Desc:
Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
Operational Flow Order - Imbalance
Transco provides notice of limited flexibility to manage imbalances due to recent trends in shipper imbalances and forecasted temperatures in Zones 6. In order to maintain system line pack and pressures for efficient and reliable firm service, Transco is issuing an Operational Flow
Please refer to the table below for the effected zones, dates and tolerance percentages.
Beginning Gas Day:
Tuesday,
July 14, 2026
9:00 AM CT
Ending Gas Day:
Friday,
July 17, 2026
9:00 AM CT
OFO Area(s):
Zones 6
Tariff Reference for OFO Issuance:*
(d)
Type of OFO:
Imbalance
Type of Imbalance:
Due From Shipper
Transactions Include:
Deliveries**
Beginning Cycle:
Timely
Tolerance % Allowed (or 1000 dth, Zone whichever is greater):
Due From Shipper 7%
Affected Shipper(s) (DUNS #):****
Affected Location(s) (DRN #/Loc ID):*****
All
Retro Scheduling Available
Yes
OBA Subject to OFO:
No
If Yes, OBA Parties (DUNS #):***
*Circumstances under which Seller may determine that an OFO must be issued include, but are not limited to in Section 52.2 of Transco's FERC Gas Tariff General Terms and Conditions:
Responding to an event of force majeure;
Accommodating capacity limitations resulting from the need to perform maintenance and/or repairs;
Ensuring current and future storage capabilities and maintenance of line pack;
Maintaining operational pressures and adequate gas supplies required to provide an efficient and reliable firm service;
Responding to any event which Seller believes in its sole judgment may jeopardize the integrity of its system.
** OFO based on all transactions with deliveries in affected OFO area.
***OFO based on all transactions with receipts in affected OFO area.
**** If specific DUNS #s have been identified, only imbalances created by those shippers/OBA parties will be subject to the OFO provisions.
*****If specific DRN #/Loc ID's have been identified, only imbalances created at those location(s) will be subject to the OFO provisions.
This OFO is directed to shippers consistent with Section 52 of Transco's FERC Gas Tariff General Terms and Conditions with a minimum of $50 per dt per day penalty. This OFO will continue until further notice. Buyers with imbalances greater than the allowed tolerance will be subject to penalties specified in Section 52 of Transco's FERC Gas Tariff General Terms and Conditions.
Additional information on Operational Flow Orders is available at this link:
http://www.1line.williams.com/Transco/files/training/Critical_Day.pdf
Please contact your Transportation Services Representative if you have any questions.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: REMINDER: Operational Flow Order - Imbalance
Posted: 07/13/2026 06:20:41 AM
Notice ID: 17055061
Notice 17055061
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/14/2026
Notice Eff Time:
09:00:00 CDT
Notice End Date:
07/17/2026
Notice End Time:
09:00:00 CDT
Notice ID:
17055061
Notice Stat Desc:
Initiate
Notice Type Desc:
OFO
Post Date:
07/13/2026
Post Time:
06:20:41 CDT
Prior Notice:
0
Reqrd Rsp Desc:
Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
REMINDER: Operational Flow Order - Imbalance
Transco provides notice of limited flexibility to manage imbalances due to recent trends in shipper imbalances and forecasted temperatures in Zones 6. In order to maintain system line pack and pressures for efficient and reliable firm service, Transco is issuing an Operational Flow
Please refer to the table below for the effected zones, dates and tolerance percentages.
Beginning Gas Day:
Tuesday,
July 14, 2026
9:00 AM CT
Ending Gas Day:
Friday,
July 17, 2026
9:00 AM CT
OFO Area(s):
Zones 6
Tariff Reference for OFO Issuance:*
(d)
Type of OFO:
Imbalance
Type of Imbalance:
Due From Shipper
Transactions Include:
Deliveries**
Beginning Cycle:
Timely
Tolerance % Allowed (or 1000 dth, Zone whichever is greater):
Due From Shipper 7%
Affected Shipper(s) (DUNS #):****
Affected Location(s) (DRN #/Loc ID):*****
All
Retro Scheduling Available
Yes
OBA Subject to OFO:
No
If Yes, OBA Parties (DUNS #):***
*Circumstances under which Seller may determine that an OFO must be issued include, but are not limited to in Section 52.2 of Transco's FERC Gas Tariff General Terms and Conditions:
Responding to an event of force majeure;
Accommodating capacity limitations resulting from the need to perform maintenance and/or repairs;
Ensuring current and future storage capabilities and maintenance of line pack;
Maintaining operational pressures and adequate gas supplies required to provide an efficient and reliable firm service;
Responding to any event which Seller believes in its sole judgment may jeopardize the integrity of its system.
** OFO based on all transactions with deliveries in affected OFO area.
***OFO based on all transactions with receipts in affected OFO area.
**** If specific DUNS #s have been identified, only imbalances created by those shippers/OBA parties will be subject to the OFO provisions.
*****If specific DRN #/Loc ID's have been identified, only imbalances created at those location(s) will be subject to the OFO provisions.
This OFO is directed to shippers consistent with Section 52 of Transco's FERC Gas Tariff General Terms and Conditions with a minimum of $50 per dt per day penalty. This OFO will continue until further notice. Buyers with imbalances greater than the allowed tolerance will be subject to penalties specified in Section 52 of Transco's FERC Gas Tariff General Terms and Conditions.
Additional information on Operational Flow Orders is available at this link:
http://www.1line.williams.com/Transco/files/training/Critical_Day.pdf
Please contact your Transportation Services Representative if you have any questions.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Operational Flow Order - Imbalance
Posted: 07/13/2026 01:31:22 PM
Notice ID: 17055898
Notice 17055898
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/14/2026
Notice Eff Time:
09:00:00 CDT
Notice End Date:
07/18/2026
Notice End Time:
09:00:00 CDT
Notice ID:
17055898
Notice Stat Desc:
Supersede
Notice Type Desc:
OFO
Post Date:
07/13/2026
Post Time:
13:31:22 CDT
Prior Notice:
17053238
Reqrd Rsp Desc:
Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
Operational Flow Order - Imbalance
Transco provides notice of limited flexibility to manage imbalances due to recent trends in shipper imbalances and forecasted temperatures in Zones 5 & 6. In order to maintain system line pack and pressures for efficient and reliable firm service, Transco is issuing an Operational Flow Order (OFO) pursuant to Section 52 of its General Terms and Conditions of its Tariff.
Please refer to the table below for the effected zones, dates and tolerance percentages.
Beginning Gas Day:
Tuesday,
July 14, 2026
9:00 AM CT
Wednesday,
July 15, 2026
9:00 AM CT
Friday,
July 17, 2026
9:00 AM CT
Ending Gas Day:
Wednesday,
July 15, 2026
9:00 AM CT
Friday,
July 17, 2026
9:00 AM CT
Saturday,
July 18, 2026
9:00 AM CT
OFO Area(s):
Zone 6
Zones 5, 6
Zones 5, 6
Tariff Reference for OFO Issuance:*
(d)
(d)
(d)
Type of OFO:
Imbalance
Imbalance
Imbalance
Type of Imbalance:
Due From Shipper
Due From Shipper
Due From Shipper
Transactions Include:
Deliveries**
Deliveries**
Deliveries**
Beginning Cycle:
Timely
Timely
Timely
Tolerance % Allowed (or 1000 dth, Zone whichever is greater):
Due From Shipper 7%
Due From Shipper 5%
Due From Shipper 7%
Affected Shipper(s) (DUNS #):****
Affected Location(s) (DRN #/Loc ID):*****
All
All
All
Retro Scheduling Available
Yes
Yes
Yes
OBA Subject to OFO:
No
No
No
If Yes, OBA Parties (DUNS #):***
*Circumstances under which Seller may determine that an OFO must be issued include, but are not limited to in Section 52.2 of Transco's FERC Gas Tariff General Terms and Conditions:
Responding to an event of force majeure;
Accommodating capacity limitations resulting from the need to perform maintenance and/or repairs;
Ensuring current and future storage capabilities and maintenance of line pack;
Maintaining operational pressures and adequate gas supplies required to provide an efficient and reliable firm service;
Responding to any event which Seller believes in its sole judgment may jeopardize the integrity of its system.
** OFO based on all transactions with deliveries in affected OFO area.
***OFO based on all transactions with receipts in affected OFO area.
**** If specific DUNS #s have been identified, only imbalances created by those shippers/OBA parties will be subject to the OFO provisions.
*****If specific DRN #/Loc ID's have been identified, only imbalances created at those location(s) will be subject to the OFO provisions.
This OFO is directed to shippers consistent with Section 52 of Transco's FERC Gas Tariff General Terms and Conditions with a minimum of $50 per dt per day penalty. This OFO will continue until further notice. Buyers with imbalances greater than the allowed tolerance will be subject to penalties specified in Section 52 of Transco's FERC Gas Tariff General Terms and Conditions.
Additional information on Operational Flow Orders is available at this link:
http://www.1line.williams.com/Transco/files/training/Critical_Day.pdf
Please contact your Transportation Services Representative if you have any questions.
Transco
Station 610 & Central Penn Line South (Jobs 1211835 & 459274) 2026 Planned Outage Maintenance Summar
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Station 610 & Central Penn Line South (Jobs 1211835 & 459274) 2026 Planned Outage Maintenance Summar
Posted: 07/15/2026 01:12:06 PM
Notice ID: 17062172
Notice 17062172
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/15/2026
Notice Eff Time:
13:12:06 CDT
Notice End Date:
Notice End Time:
Notice ID:
17062172
Notice Stat Desc:
Initiate
Notice Type Desc:
Maint
Post Date:
07/15/2026
Post Time:
13:12:06 CDT
Prior Notice:
0
Reqrd Rsp Desc:
Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
Station 610 & Central Penn Line South (Jobs 1211835 & 459274) 2026 Planned Outage Maintenance Summar
Transco will be performing necessary maintenance associated with Jobs 1211835 & 459274 on its 2026 Planned Outage and Maintenance Summary. Transco will be running two inline inspection tools on the Central Penn Line South
.
These runs are a part of an integrity assessment normally completed on a 7-year interval. Additionally, Transco will be performing a turbine exchange on Main Unit 3 at Station 610. These maintenance activities will impact the availability of primary firm transportation services moving north to south on Central Penn Line South. The current schedule for this maintenance is
Tuesday, 08/18/2026
through
Friday, 08/28/2026
. Specific dates of the actual pig runs are provided below.
Pig Runs
Dates
Gauge Tool
08/18
Combo Tool
08/20
Station 610
Dates
Main Unit 3
08/18 – 08/28
The below Throughput Section Boundary (TSB) will be used to manage capacity availability during this planned work. An updated Market and Production constraint notice will include the location and the available quantity of all transportation services during the indicated period.
TSB Name- Location
Location ID
Flow Direction
CPLS N TO S TSB MP 1.0
9010778
N to S
Estimated Outage
Design Capacity (Mdt/d)
Total Primary Firm Qty Available (Mdt/d)
%Cuts (Primary)-Potential Shipper Impact (Based on Historical Utilization)
08/18 (Gauge Tool Run)
2,328
2,093
0-8%
08/19
2,328
2,093
0-8%
08/20 (Smart Tool Run)
2,328
1,400
35-40%
08/21 thru 08/28
2,328
2,093
0-8%
*% Cuts (Primary) is an estimate of the impact to primary firm shippers based on historical utilization and anticipated volumes during the time of constraint. These amounts are subject to change based on actual nominated firm volumes and changes in the amount of available capacity.
If you have any questions, please contact your Transportation Services Representative.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Tryon Lateral Unplanned Immediate Digs 2026 Planned Outage and Maintenance Summary
Posted: 07/16/2026 11:59:47 AM
Notice ID: 17064967
Notice 17064967
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/16/2026
Notice Eff Time:
11:59:47 CDT
Notice End Date:
Notice End Time:
Notice ID:
17064967
Notice Stat Desc:
Initiate
Notice Type Desc:
Maint
Post Date:
07/16/2026
Post Time:
11:59:47 CDT
Prior Notice:
0
Reqrd Rsp Desc:
Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
Tryon Lateral Unplanned Immediate Digs 2026 Planned Outage and Maintenance Summary
Due to findings from the integrity assessment associated with Job #1211808 performed on the Tryon Lateral (located near Station 140) in April 2026, Transco must immediately reduce pressure on the lateral to address certain identified anomalies. During this unplanned maintenance, the below meters will experience lower than normal pressures.
Location Name
Meter #
Location Type
Mill Springs
7225
Del
Columbus
7229
Del
Tryon
7227
Del
Greer Landrum
7326
Del
Inman
7221
Del
West Startex
7294
Del
Transco will coordinate directly with impacted customers as work progresses and more information becomes available. The date for return to normal operations will be determined based upon field assessments.
If you have any questions, please contact your Transportation Services Representative.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Update - Market and Production Constraints
Posted: 07/20/2026 07:05:54 AM
Notice ID: 17076106
Notice 17076106
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/20/2026
Notice Eff Time:
07:05:54 CDT
Notice End Date:
Notice End Time:
Notice ID:
17076106
Notice Stat Desc:
Supersede
Notice Type Desc:
Constraint
Post Date:
07/20/2026
Post Time:
07:05:54 CDT
Prior Notice:
17033639
Reqrd Rsp Desc:
No response required
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
Update - Market and Production Constraints
The available capacity listed below in each section will become effective
July 21, 2026
. Changes from the previous gas day are highlighted in
bold
.
The following chart reflects the quantity of available transportation capacity including Primary, Non-Secondary Reverse Path (NSRP), Secondary Firm, and Interruptible at various Throughput Section Boundary (TSB) locations or segment constraints. These TSBs are identified as receipt or delivery based.
Maintenance TSB Constraints
Loc ID
Location Name
ZN
Del/Rec
Type of TSB
Available Capacity Mdt/d
Highest Priority Included*
Flow Dir
Job #
9012663
Compressor Station 160
5
Del
M-L
1,726
PRIMARY
N-S
327549
9011480
Sta 40 MP 389.19 S to N
2
Rec
M-L
534
PRIMARY
S-N
249679
*The priority listed in addition to all lower priorities will be subject to the Available Capacity. If the priority listed references “Only”, only the priority listed will be allowed and subject to the Available Capacity; All lower priorities will not be allowed.
System TSB Constraints
Loc ID
Location Name
ZN
Del/Rec
Type of TSB
Available Capacity Mdt/d
Highest Priority Included*
Flow Dir
9011140
Mainline MP 438.84
2
Rec
L
709
PRIMARY
S to N
9000000
Compressor Station 60 MP 588.62
3
Rec
Loc
200
NSRP
S to N
9011460
SWLA Lat N to S MP 1.0
2
Del
L
40
NSRP
N to S
9011260
SELA N to S MP 85.93
3
Rec
L
0
PRIMARY
N to S
9011261
SELA S to N MP 85.94
3
Rec
L
0
PRIMARY
S to N
9001620
Mobile Bay Lat South Asc MP 20
4A
Del
L
25
NSRP
N to S
5000048
TSB MP 1412.98 to MP 1369.45
5
Del
S
0
NSRP
N to S
1001280
S Virginia Lat Sta 167 MP 69.12
5
Del
L
0
SECONDARY
N to S
5000033
TSB MP 1413.00 to MP 1519.92
5
Del
S
200
NSRP
N to S
5000039
TSB MP 1519.93 to MP 1586.30
5
Del
S
200
NSRP
N to S
5000040
TSB MP 1586.30 to 1674.56
5,6
Del
S
200
NSRP
N to S
9010778
Central Penn South N to S TSB MP 1.00
6
Del
L
0
SECONDARY
N to S
9008342
Marcus Hook Lateral TSB MP 1.10
6
Del
L
200
SECONDARY
N to S
9012063
Marcus Hook Lateral TSB MP 18.71
6
Del
L
OPEN
N to S
9008343
Trenton Woodbury Lateral TSB MP 1.00
6
Del
L
200
SECONDARY
N to S
9007422
Station 207 Lower Bay Lateral MP 8.57
6
Del
L
447
SECONDARY
W to E
9008482
NY Bay Lateral MP 35.00
6
Del
L
0
SECONDARY
W to E
9008866
Mainline Milltown MP 1790.85
6
Del
L
0
NSRP
S to N
1001300
Linden MP 1808.191
6
Del
L
50
NSRP
S to N
9010838
Rivervale Lat. North NJ Ext. MP 19.0
6
Rec
L
0
SECONDARY
N to S
9010459
Central Penn Line North N to S MP 1.00
6
Rec
L
1,112.4
PRIMARY
N to S
9007462
Leidy Station 517 W MP 127.949
6
Del
L
400
NSRP
E to W
9007463
Leidy Station 520 W MP 170.389
6
Del
L
400
NSRP
E to W
9008462
Leidy Line West End MP 205.00
6
Del
L
400
NSRP
E to W
*The priority listed in addition to all lower priorities will be subject to the Available Capacity. If the priority listed references “Only”, only the priority listed will be allowed and subject to the Available Capacity; All lower priorities will not be allowed.
Location TSB (L); Segment TSB (S); Maintenance Location TSB (M-L)
The following chart reflects the quantity of available High Burn Limit Value (HBLV) no-notice swing service including Non-Traditional (NT Swing), Secondary (Sec Swing) and Interruptible (IT Swing) at various location or segment HBLV constraints.
Loc/Seg ID
HBLV Location/Segment Constraint
Zone
Type of HBLV
Available Swing Mdt/d
Highest Priority Included
5000027
Zone 1 Segment
1
S
1
Secondary
5000028
Zone 2 Segment
2
S
0
Secondary
5000029
Zone 3 Segment
3
S
0
Secondary
5000030
Zone 4 Segment
4
S
0
Secondary
5000031
Zone 5 Segment
5
S
0
Secondary
5000032
Zone 6 Segment
6
S
0
Secondary
Location (L); Segment (S)
The following chart reflects the quantity of available High Burn Limit Value (HBLV) no-notice swing service including Non-Traditional (NT Swing), Secondary (Sec Swing) and Interruptible (IT Swing) at various location or segment HBLV constraints.
Loc ID
Location Name
Zone
Del/Rec
Single Point or Group
Available Capacity Mdt/d
1005046
Duralde M2856
3
Rec
L
460
9003442
Pine Prairie Stg
3
Rec
L
900
9003442
Pine Prairie Stg
3
Del
L
***
1006218
Ragley Trunkline
3
Rec
L
350
9010378
TOD Leidy West Aggregate Receipt MP 101.00
6
Rec
G
OPEN
9010379
TOD Leidy East Aggregate Receipt MP 101.00
6
Rec
G
OPEN
9007682
Leidy Line Aggregate Receipt MP 101.00
6
Rec
G
OPEN
9001342
Martins Creek #3
6
Rec
L
43
1006561
Algonquin - Ctr M4402
6
Del
L
135**
9007962
Raceland I/C
3
Del
L
40
1004123
Terrebonne Sta 62 I/C
3
Del
L
85
1006304
Vinton FGT Meter 4381
2
Del
L
0
9002300
POOLE ROAD
1
Del
L
80
Location (L); Aggregate of Locations (G)
Leidy Aggregate Receipts consist of: Puddlefield, Carverton and Chapin
Markham Aggregate Deliveries consist of: Markham Channel, Markham Valero, Markham SW #1, and Poole Road
TOD Leidy West consists of: Puddlefield, Carverton and Chapin
TOD Leidy East consists of: Puddlefield, Carverton and Chapin
** Non-Traditional and Lower Priorities
*** Delivery qty. available only by displacement of scheduled receipt qty.
To the extent that the total nominated quantities or requested HBLV quantities exceed the available capacity/swing in the charts identified above, Transco will adjust these quantities based on its priority of service, in accordance with the General Terms and Conditions of Transco's FERC Gas Tariff.
This information is provided as a summary of significant information that coincides with information currently available under Transco's Operational Capacity report and is intended to provide customers with an easy reference source. Transco may be required to institute capacity restrictions at locations or in segments other than those identified above if operational conditions dictate. As operational conditions change, Transco will provide notice, via 1Line, of any additional segments or locations where transportation services or HBLVs may be limited and of any changes in available capacity in any of the identified areas.
If you have any questions, please contact your Commercial Services Representative.
Transco
Station 35 ESD Test (Job 327479) 2026 Planned Outage and Maintenance Summary
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Station 35 ESD Test (Job 327479) 2026 Planned Outage and Maintenance Summary
Posted: 03/13/2026 09:19:38 AM
delvid: 16654056
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical: Y
Notice Eff Date: 03/13/2026
Notice Eff Time: 09:19:38 CDT
Notice End Date:
Notice End Time:
Notice ID: 16654056
Notice Stat Desc: Initiate
Notice Type Desc: Maint
Post Date: 03/13/2026
Post Time: 09:19:38 CDT
Prior Notice: 0
Reqrd Rsp Desc: Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP: 007933021
TSP Name: TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject: Station 35 ESD Test (Job 327479) 2026 Planned Outage and Maintenance Summary
Transco will be performing a necessary compressor station outage associated with Job #327479 on its 2026 Planned Outage and Maintenance Summary. This outage is required to perform testing of safety systems at the facility. The current schedule for this maintenance is April 7, 2026.
Operating Conditions resulting from this work will require Transco to limit scheduled quantities for all transportation priorities moving south to north through the location indicated below.
The location Throughput Section Boundaries (“TSB”) for station 35 at mainline milepost 327.27 S-N will be used to manage capacity availability during this planned work. An updated Market and Production Area constraint notice will include the TSBs and the available quantity of primary-firm transportation priority during the indicated period.
TSB Name - Location
Location ID
Flow Direction
ML S35 S to N MP 327.27
9011644
South to North
Estimated Outage
Design Capacity (Mdt/d)
Total Qty Available (Mdt/d)
% Available Total Primary-Firm vs Design Capacity
% Cuts (Primary)Potential Shipper Impact (Based on Historical Utilization)
Apr. 7
709
569
80%
15-20%
If you have any questions, please contact your Transportation Services Representative.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: 2026 Major Construction and Maintenance Projects
Posted: 03/12/2026 07:24:20 AM
delvid: 16650315
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical: Y
Notice Eff Date: 03/12/2026
Notice Eff Time: 07:24:20 CDT
Notice End Date:
Notice End Time:
Notice ID: 16650315
Notice Stat Desc: Supersede
Notice Type Desc: Maint
Post Date: 03/12/2026
Post Time: 07:24:20 CDT
Prior Notice: 16629363
Reqrd Rsp Desc: No response required
Rsp Date:
Rsp Time:
TSP: 007933021
TSP Name: TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject: 2026 Major Construction and Maintenance Projects
Please be advised that Transco’s major construction and maintenance schedule for projects that are currently planned for 2026 has been updated and can be accessed using the link below. Note the addition of a tab specifically dedicated to Pipeline Inspection (ILI) Activities. The link to the maintenance schedule will also be available on the informational postings portion of the 1Line portal under the operational information tab.
While significant effort has been made to provide dates for the 2026 schedule, the dates and duration of the planned work are subject to change. Transco will provide revisions to the maintenance schedule as updated information is available.
Some of this work will affect the availability of interruptible transportation services (IT and secondary FT). The extent of this impact will depend on operating conditions at the time of the outage. If a maintenance activity is expected to affect the availability of transportation services, additional information will be posted prior to commencement of that activity.
Click here to access the 2026 Maintenance Schedule link.
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: 2026 Major Construction and Maintenance Projects
Posted: 03/05/2026 06:00:12 AM
delvid: 16629363
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical: Y
Notice Eff Date: 03/05/2026
Notice Eff Time: 06:00:12 CST
Notice End Date:
Notice End Time:
Notice ID: 16629363
Notice Stat Desc: Supersede
Notice Type Desc: Maint
Post Date: 03/05/2026
Post Time: 06:00:12 CST
Prior Notice: 16606144
Reqrd Rsp Desc: No response required
Rsp Date:
Rsp Time:
TSP: 007933021
TSP Name: TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject: 2026 Major Construction and Maintenance Projects
Please be advised that Transco’s major construction and maintenance schedule for projects that are currently planned for 2026 has been updated and can be accessed using the link below. Note the addition of a tab specifically dedicated to Pipeline Inspection (ILI) Activities. The link to the maintenance schedule will also be available on the informational postings portion of the 1Line portal under the operational information tab.
While significant effort has been made to provide dates for the 2026 schedule, the dates and duration of the planned work are subject to change. Transco will provide revisions to the maintenance schedule as updated information is available.
Some of this work will affect the availability of interruptible transportation services (IT and secondary FT). The extent of this impact will depend on operating conditions at the time of the outage. If a maintenance activity is expected to affect the availability of transportation services, additional information will be posted prior to commencement of that activity.
Click here to access the 2026 Maintenance Schedule link.
Transco
2026 Major Construction and Maintenance Projects
SEV 2/5
Informational
Transco has posted a routine update (Revision 3) to its 2026 major construction and maintenance schedule, noting the addition of a new Pipeline Inspection (ILI) Activities tab. No specific capacity restrictions, affected segments, or volumes are identified in this notice. Impacts are limited to interruptible and secondary firm transportation services, with additional notices to be posted prior to individual maintenance activities.
No new market impact -- this is a routine schedule update with no specific capacity figures or segment restrictions named; market has already priced any previously disclosed 2026 Transco maintenance constraints.
Reroute: Not applicable -- no specific capacity constraint is identified in this notice. When individual maintenance activities are posted with segment-level detail, reroute assessment via Southern Natural Gas (SNG/EGT) and Tennessee Gas Pipeline (TGP) would apply for Southeast corridors.
View original notice text
Pipeline: Transco
Notice: 2026 Major Construction and Maintenance Projects
Posted: 07/02/2026 12:53:19 PM
Notice ID: 17022850
Notice 17022850
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/02/2026
Notice Eff Time:
12:53:19 CDT
Notice End Date:
Notice End Time:
Notice ID:
17022850
Notice Stat Desc:
Supersede
Notice Type Desc:
Maint
Post Date:
07/02/2026
Post Time:
12:53:19 CDT
Prior Notice:
16996695
Reqrd Rsp Desc:
No response required
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
2026 Major Construction and Maintenance Projects
Please be advised that Transco’s major construction and maintenance schedule for projects that are currently planned for 2026 has been updated and can be accessed using the link below. Note the addition of a tab specifically dedicated to Pipeline Inspection (ILI) Activities. The link to the maintenance schedule will also be available on the informational postings portion of the
1Line portal
under the operational information tab.
While significant effort has been made to provide dates for the 2026 schedule, the dates and duration of the planned work are subject to change. Transco will provide revisions to the maintenance schedule as updated information is available.
Some of this work will affect the availability of interruptible transportation services (IT and secondary FT). The extent of this impact will depend on operating conditions at the time of the outage. If a maintenance activity is expected to affect the availability of transportation services, additional information will be posted prior to commencement of that activity.
Click
here
to access the 2026 Maintenance Schedule link.
Transco
Meter Outage Kinder M3371 (Job 688339) 2026 Planned Outage and Maintenance Summary
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Meter Outage Kinder M3371 (Job 688339) 2026 Planned Outage and Maintenance Summary
Posted: 07/08/2026 02:00:39 PM
Notice ID: 17040951
Notice 17040951
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/08/2026
Notice Eff Time:
14:00:39 CDT
Notice End Date:
Notice End Time:
Notice ID:
17040951
Notice Stat Desc:
Initiate
Notice Type Desc:
Maint
Post Date:
07/08/2026
Post Time:
14:00:39 CDT
Prior Notice:
0
Reqrd Rsp Desc:
Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
Meter Outage Kinder M3371 (Job 688339) 2026 Planned Outage and Maintenance Summary
Transco will be performing a necessary line outage for Sun Kinder Lateral abandonment work associated with Job #688339 on its 2026 Planned Outage and Maintenance Summary. The current schedule for this maintenance is
August 18, 2026 through August 28, 2026.
During the maintenance outage, the location(s) identified below will not be available for scheduling or flow:
Location Name
Location ID
Location Type
Kinder M3371
1006149
Receipt
If you have any questions, please contact your Transportation Services Representative.
Transco
Station 80-100 MLD Tool Re-Runs (Job 1211799) 2026 Planned Outage and Maintenance Summary
Below alert threshold -- no detailed analysis performed.
Reroute: Not assessed.
View original notice text
Pipeline: Transco
Notice: Station 80-100 MLD Tool Re-Runs (Job 1211799) 2026 Planned Outage and Maintenance Summary
Posted: 07/16/2026 08:25:55 AM
Notice ID: 17064615
Notice 17064615
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/16/2026
Notice Eff Time:
08:25:55 CDT
Notice End Date:
Notice End Time:
Notice ID:
17064615
Notice Stat Desc:
Initiate
Notice Type Desc:
Maint
Post Date:
07/16/2026
Post Time:
08:25:55 CDT
Prior Notice:
0
Reqrd Rsp Desc:
Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
Station 80-100 MLD Tool Re-Runs (Job 1211799) 2026 Planned Outage and Maintenance Summary
Due to unacceptable data gathered during the previous tool run (June 11), Transco will be performing an additional pipeline integrity assessment on Mainline D between Station 80 and Station 100 associated with Job#1211799 on its 2026 Planned Outage and Maintenance Summary. Operating Conditions resulting from this work may require Transco to restrict scheduled quantities for transportation priorities moving south to north through the location indicated below. Based on historical scheduled quantities, Transco does not anticipate impacts to primary firm services. However, some impacts to non-primary services are expected. Unforeseen issues including, but not limited to nominations, weather, or other factors impacting system operating conditions may result in more significant scheduling reductions than expected.
Pig Runs
Dates
Cleaner Tool
August 12
MFL Tool
August 14
The location Throughput Section Boundary (“TSB”) listed below will be used to manage capacity availability during this planned work. An updated Market and Production Area constraint notice will include the TSB and the available quantity of all transportation priorities during the indicated period.
TSB Name - Location
Location ID
Flow Direction
ML Sta 80 TSB
9012483
South to North
Estimated Outage
Location ID
Design Capacity (Dt/d)
Total Quantity
Available (Dt/d)
% Available Total Primary-Firm vs Design Capacity
% Cuts (Primary) – Potential Shipper Impact (Based on Historical Utilization)*
August 12 & 14
9012483
3,421,000
2,931,000
86%
0%
*% Cuts (Primary) is an estimate of the impact to primary firm shippers based on historical utilization and anticipated volumes during the time of constraint. These amounts are subject to change based on actual nominated firm volumes and changes in the amount of available capacity.
If you have any questions, please contact your Transportation Services Representative.
Transco
Station 50 (Job 361708) Outage 2026 Planned Outage and Maintenance Summary
SEV 2/5
Maintenance0.100 Bcf/d1 Days
Transco is performing a planned one-day compressor station outage at Station 50 West (MP 517.23) on September 9, 2026 for safety systems testing. The event restricts south-to-north flow through the TSB, reducing available throughput from 1,535 MDt/d design capacity to 1,435 MDt/d, a loss of approximately 0.100 Bcf/d. Estimated shipper impact is 0-5% of primary firm volumes based on historical utilization.
Single-day planned Transco maintenance on September 9 removes approximately 0.100 Bcf/d of southbound-to-northbound capacity at Station 50 West; impact is negligible with 94% of design capacity remaining available and no firm curtailments expected.
Reroute: Moderate: Southern Natural Gas (SNG/EGT) and Tennessee Gas Pipeline serve overlapping Southeast-to-Northeast corridors and can absorb minor displacement volumes given the small capacity reduction involved.
View original notice text
Pipeline: Transco
Notice: Station 50 (Job 361708) Outage 2026 Planned Outage and Maintenance Summary
Posted: 07/21/2026 11:52:53 AM
Notice ID: 17080814
Notice 17080814
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/21/2026
Notice Eff Time:
11:52:53 CDT
Notice End Date:
Notice End Time:
Notice ID:
17080814
Notice Stat Desc:
Initiate
Notice Type Desc:
Maint
Post Date:
07/21/2026
Post Time:
11:52:53 CDT
Prior Notice:
0
Reqrd Rsp Desc:
Immediate response required of an operational nature may be required of impacted shippers
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
Station 50 (Job 361708) Outage 2026 Planned Outage and Maintenance Summary
Transco will be performing a necessary compressor station outage associated with Job #361708 on its 2026 Planned Outage and Maintenance Summary. This outage is required to perform testing of safety systems at the facility. The current schedule for this maintenance is for
one day on September 9, 2026
.
Operating conditions resulting from this work will require Transco to limit scheduled quantities for all transportation priorities moving south to north through the location indicated below.
The Throughput Section Boundary (TSB) at mainline MP 517.23 (Station 50 West) will be used to manage capacity availability during this planned work. An updated Market and Production Area constraint notice will include the location and the available quantity of all transportation services during the indicated period.
TSB Name - Location
Location ID
Flow Direction
COMPRESSOR STATION W 50 MP 517.23
9013363
South to North
Design Capacity (MDt/d)
Total Quantity Available (Mdt/d)
% Available Total Primary-Firm vs Design Capacity
% Cuts (Primary) – Potential Shipper Impact (Based on Historical Utilization)*
1,535
1,435
94%
0-5%
*% Cuts is an estimate of the impact to shippers based on historical utilization and anticipated volumes during the time of constraint. These amounts are subject to change based on actual nominated firm volumes and changes in the amount of available capacity.
If you have any questions, please contact your Transportation Services Representative.
Transco
2026 Major Construction and Maintenance Projects
SEV 1/5
Informational
Transco has posted an updated 2026 major construction and maintenance schedule, superseding prior notice 17022850. The notice is informational only, advising that planned work may affect interruptible and secondary firm transportation services, with no specific capacity volumes, dates, or affected segments identified in this notice. Additional notices will be posted prior to individual maintenance activities if firm service impacts are expected.
Informational scheduling update only -- no specific capacity restrictions or basis implications identified; monitor Transco 1Line for individual maintenance activity notices as they are posted closer to execution.
Reroute: Not applicable -- no specific constraint identified in this notice. When individual Transco maintenance events are posted, reroute potential will vary by segment; SNG/EGT provides partial Southeast alternative, TGP serves overlapping Northeast markets, but Transco is the dominant pipe in its corridors with limited full reroute capacity.
View original notice text
Pipeline: Transco
Notice: 2026 Major Construction and Maintenance Projects
Posted: 07/09/2026 08:00:31 AM
Notice ID: 17043258
Notice 17043258
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/09/2026
Notice Eff Time:
08:00:31 CDT
Notice End Date:
Notice End Time:
Notice ID:
17043258
Notice Stat Desc:
Supersede
Notice Type Desc:
Maint
Post Date:
07/09/2026
Post Time:
08:00:31 CDT
Prior Notice:
17022850
Reqrd Rsp Desc:
No response required
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
2026 Major Construction and Maintenance Projects
Please be advised that Transco’s major construction and maintenance schedule for projects that are currently planned for 2026 has been updated and can be accessed using the link below. Note the addition of a tab specifically dedicated to Pipeline Inspection (ILI) Activities. The link to the maintenance schedule will also be available on the informational postings portion of the
1Line portal
under the operational information tab.
While significant effort has been made to provide dates for the 2026 schedule, the dates and duration of the planned work are subject to change. Transco will provide revisions to the maintenance schedule as updated information is available.
Some of this work will affect the availability of interruptible transportation services (IT and secondary FT). The extent of this impact will depend on operating conditions at the time of the outage. If a maintenance activity is expected to affect the availability of transportation services, additional information will be posted prior to commencement of that activity.
Click
here
to access the 2026 Maintenance Schedule link.
Transco
2026 Major Construction and Maintenance Projects
SEV 1/5
Informational
Transco has posted an updated 2026 major construction and maintenance schedule as an informational notice, superseding prior notice 17043258. The schedule covers planned projects throughout 2026 and includes a new tab for Pipeline Inspection (ILI) activities. No specific capacity restrictions or affected segments are identified in this notice; individual maintenance events will be posted separately prior to commencement.
This is a high-level schedule update with no specific capacity restriction announced -- no actionable basis or Henry Hub signal until individual maintenance windows are posted with segment and volume detail.
Reroute: Not applicable -- no operational constraint is identified in this notice; reroute assessment will depend on specific maintenance windows posted in subsequent notices.
View original notice text
Pipeline: Transco
Notice: 2026 Major Construction and Maintenance Projects
Posted: 07/16/2026 08:17:55 AM
Notice ID: 17064602
Notice 17064602
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Critical:
Y
Notice Eff Date:
07/16/2026
Notice Eff Time:
08:17:55 CDT
Notice End Date:
Notice End Time:
Notice ID:
17064602
Notice Stat Desc:
Supersede
Notice Type Desc:
Maint
Post Date:
07/16/2026
Post Time:
08:17:55 CDT
Prior Notice:
17043258
Reqrd Rsp Desc:
No response required
Rsp Date:
Rsp Time:
TSP:
007933021
TSP Name:
TRANSCONTINENTAL GAS PIPE LINE COMPANY, LLC
Notice Text:
Subject:
2026 Major Construction and Maintenance Projects
Please be advised that Transco’s major construction and maintenance schedule for projects that are currently planned for 2026 has been updated and can be accessed using the link below. Note the addition of a tab specifically dedicated to Pipeline Inspection (ILI) Activities. The link to the maintenance schedule will also be available on the informational postings portion of the
1Line portal
under the operational information tab.
While significant effort has been made to provide dates for the 2026 schedule, the dates and duration of the planned work are subject to change. Transco will provide revisions to the maintenance schedule as updated information is available.
Some of this work will affect the availability of interruptible transportation services (IT and secondary FT). The extent of this impact will depend on operating conditions at the time of the outage. If a maintenance activity is expected to affect the availability of transportation services, additional information will be posted prior to commencement of that activity.
Click
here
to access the 2026 Maintenance Schedule link.
