Download File: AGT Outage Schedule.pdf
Download File: AGT Major Outage Overview.pdf

Below is a list of major outages known to date that will affect capacity or that impact major receipt/delivery areas on the Algonquin Gas Transmission (AGT) system.  Due to unforeseen delays or scheduling conflicts, the dates of the outages listed below are subject to change.  In addition, this schedule is not a complete list of all outages that will occur this outage season, and we reserve the right to update this list to reflect additional major outages when the timing of such major outages can be reasonably forecasted.  Any changes to the list below will be posted at the earliest practical date.  Furthermore, when operationally feasible, AGT will coordinate with upstream and downstream point operators as necessary, to help minimize the operational impact of outages.  Parties are urged to monitor these posting to access the most current information. 

 

AGT Operational Capacity Matrix:

 

	Stony Point	Southeast	Oxford	Cromwell	Chaplin	Burrillville	G-system	J-system	Trapelo	I-8 Forward	I-8 Backward	Weymouth
15-Sep	1,750	1,715	1,395	1,195	930	921	440	360	324	150	440	80
16-Sep	1,750	1,715	1,395	1,195	916	908	440	360	310	150	440	80
17-Sep	1,750	1,715	1,395	1,195	995	950	440	360	324	150	440	80
18-Sep	1,750	1,715	1,395	1,195	981	950	440	360	324	150	440	80
19-Sep	1,621	1,600	1,328	1,122	852	844	440	225	153	150	440	80
20-Sep	1,621	1,600	1,328	1,122	852	844	440	225	153	150	440	80
21-Sep	1,621	1,600	1,328	1,122	852	844	440	225	153	150	440	80
22-Sep	1,621	1,600	1,328	1,122	852	844	440	225	153	150	440	80
23-Sep	1,621	1,600	1,341	1,136	910	902	440	225	153	150	440	80
24-Sep	1,621	1,600	1,341	1,136	910	902	440	225	153	150	440	80
25-Sep	1,621	1,600	1,341	1,136	834	827	440	225	153	150	440	80
26-Sep	1,621	1,600	1,341	1,136	834	827	440	225	153	150	440	80
27-Sep	1,621	1,600	1,341	1,136	834	827	440	225	153	150	440	80
28-Sep	1,621	1,600	1,341	1,136	834	827	440	225	153	150	440	80
29-Sep	1,750	1,715	1,395	1,195	1,005	950	401	360	324	150	440	80
30-Sep	1,750	1,715	1,395	1,195	1,005	950	401	360	324	150	440	80

 

⁽¹⁾ AGT will update the Capacity Matrix for future gas days in subsequent outage update postings.

⁽²⁾ Limited No Notice -- Percentage will vary daily based on customer nominations.

⁽³⁾ No Notice Service Suspended

 

 

 

 

 

 

 

 

 

 

 

 

	Stony Point	Southeast	Oxford	Cromwell	Chaplin	Burrillville	G-system	J-system	Trapelo	I-8 Forward	I-8 Backward	Weymouth
1-Oct	1,750	1,715	1,395	1,195	1,005	950	401	360	324	150	440	80
2-Oct	1,750	1,715	1,395	1,195	892	885	401	360	324	150	440	80
3-Oct	1,750	1,715	1,395	1,104	901	894	401	360	324	150	440	0
4-Oct	1,559	1,539	1,395	1,195	943	936	401	360	324	150	440	0
5-Oct	1,750	1,715	1,395	1,195	969	950	401	360	324	150	440	0
6-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
7-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
8-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
9-Oct	1,697	1,676	1,395	1,195	1,005	950	440	360	324	150	440	80
10-Oct	1,395	1,381	1,269	1,155	1,005	950	440	360	324	150	440	80
11-Oct	1,401	1,387	1,275	1,160	1,005	950	440	360	324	150	440	80
12-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
13-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
14-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
15-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
16-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
17-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
18-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
19-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
20- Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
21-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
22-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
23-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
24-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
25-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
26-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
27-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
28-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
29-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
30-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80
31-Oct	1,750	1,715	1,395	1,195	1,005	950	440	360	324	150	440	80

 

⁽¹⁾ AGT will update the Capacity Matrix for future gas days in subsequent outage update postings.

⁽²⁾ Limited No Notice -- Percentage will vary daily based on customer nominations.

⁽³⁾ No Notice Service Suspended

 

 

 

AGT Compressor Station Outages:

AGT will be conducting outages at the following compressor stations.  Please refer to the operational capacity matrix for a list of mainline capacities during each of the following outages:

 

Date	Station	Additional Details
May 4 - Sept 30	Southeast	Unit 2
May 8 - Sept 15	Stony Point	Units 5, 6, 7, 8 and 9 (Units out 1 at a time sporadically during timeframe)
September 11 - 15	Oxford	Unit 1
September 12 - 16	Chaplin	Unit 1, 2, 3
September 17 - 18	Chaplin	Unit 4
September 18 - 22	Oxford	Unit 3
September 25 - 29	Oxford	Unit 4
September 25 - 29	Burrillville	Unit 5
September 25 - Oct 4	Stony Point	Units 5, 6, 7, 8 and 9 (Units out 1 at a time sporadically during timeframe)
September 28	Southeast	Unit 3
October 2	Burrillville	Unit 6
October 3	Cromwell	Unit 7, 8, 10 and 11
October 3 - 5	Weymouth	Station
October 4	Cromwell	Unit 9
October 10 - 11	Southeast	Station
October 10 - 14	Hanover	Station
October 12	Southeast	Unit 3
TBD	Burrillville	Unit 4

 

Based on historical nominations, AGT anticipates restrictions to interruptible, secondary services and potentially primary firm services.

Main Line Outages:

Below is a list of potentially impactful mainline outages occurring on the AGT system this year.  Capacity impacts associated with these outages are reflected in the capacity matrix above.

 

Lambertville to Hanover to Stony Point 26" M/L - Detailed Investigations VS2-7: July 18 - September 22

Capacity impacts associated with this outages are reflected in the TE/AGT . No impact anticipated during this outage.

 

 

26" Oxford to Cromwell - Detailed Investigations VS3:  TBD

During this outage, AGT will be required to isolate VS3 on its 26" M/L. 

 

 

24" Cromwell to Chaplin - Detailed Investigations:  Sept 19 - Sept 29

During this investigation, AGT will be requiring low pressure and/or isolation. During this outage, MR00851 - BROOKFIELD DELIVERY (FAIRFIELD,CT) will be limited to approx. 230,000 Dth/d.

 

 

L30B Cromwell to Burrillville - Tool Runs:  TBD

AGT will be conducting tool runs on its 30" L30B.

 

 

24" Chaplin to Burrillville - Detailed Investigations:  Sept 19 - Sept 28

During this outage, AGT will be required to isolate on its 24" M/L.    

 

 

24" Burrillville to EOL - Detailed Investigation VS3:  TBD 2024

During this investigation, MR 00095 - OCEAN ST (PROVIDENCE,RI) will unavailable for flow.

 

 

24" Burrillville to EOL - Detailed Investigation VS8:  TBD Q2 2024 - approximately 10 days

During this outage, AGT will be required to isolate VS8 on its 24" M/L, capacity will be zero thru Needham for deliveries on the J-System.  During this outage, MR00038 - CHARLES RIVER RD (NORFOLK,MA) will be unavailable for flow and all meters on the J-System will need to source gas from MR00271 - EVERETT INT. (MIDDLESEX,MA) or MR00206 - LINCOLN(MIDDLESEX,MA).

 

 

Weymouth to EOL - Tool Runs:  TBD 2024

Tool runs will begin approximately 4 am and run for 12 hours.  Beginning at midnight of the morning of the tools runs, and for the duration of the runs, MR00837 - SALEM HARBOR STATION will be unavailable.  AGT will coordinate with meter operators.

 

 

Lateral Outages:

Below is a list of potentially impactful lateral outages occurring on the AGT system this year.  Any G and/or J System capacity impacts associated with these outages are reflected in the capacity matrix above.

 

 

E-1 System - Detailed Investigations VS4:  Early October TBD

AGT will be conducting detailed investigations on its E-1 System in VS4.

 

 

E-1 System - Detailed Investigations VS5:  Early October TBD

AGT will be conducting detailed investigations on its E-1 System in VS5. During this outage, MR 00007 - WATERFORD (NEW LONDON,CT) will be unavailable.

 

 

G-1L System - Detailed Investigations VS7:  September 28 - October 5

AGT will be conducting detailed investigations on its G-1L System in VS7.

 

 

G-1L System - Detailed Investigations VS5:  TBD 2024

AGT will be conducting detailed investigations on its G-1L System in VS5.

 

 

G-1 System - Pipe Replacement VS12:  TBD Q2 2024

AGT will be conducting a pipe replacement on its G-1 System in VS12.  During this outage, MR 00049 - NEW ENGLAND GAS COMPANY WESTPORT (BRISTOL,MA) will be unavailable.

 

 

G-2 System - Detailed Investigations VS3:  October 16 - October 23

AGT will be conducting detailed investigations on its G-2 System in VS3.  No impact anticipated during this outage.

 

 

G-3 System Tool Runs:  September 14

AGT will be conducting tool runs on its G-3 System. 

 

 

G-3L System - Detailed Investigations:  October 3 - October 9

AGT will be conducting detailed investigations on its G-3L System.  No impact anticipated during this outage.

 

 

G-5 System Tool Runs:  September 12

AGT will be conducting tool runs on its G-5 System. 

 

 

G-12L System Tool Runs:  October 3

AGT will be conducting tool runs on its G-12L System.  AGT will coordinate with MR 00842 - NATIONAL GRID - CRARY STREET-PROVIDENCE,,RI and MR 00087 - PG&E MANCHESTER ST, (PROVIDENCE,RI).

 

 

G-15 System - Pipeline Outage:  TBD 2023 - approximately 3 days

AGT will be conducting a pipeline outage on its G-15 System.  During this outage MR00037 - SOUTH ATTLEBORO (BRISTOL, MA) will be unavailable for flow.

 

 

H-1 System - Detailed Investigations VS2:  TBD 2024

AGT will be conducting detailed investigations on its H-1 System in VS2. During this outage MR 00020 - MILFORD (WORCESTER,MA) will be unavailable for flow.

 

 

I-2 System - Detailed Investigations VS3:  June 22 - September 27

AGT will be conducting detailed investigations on it's I-2 System in VS3.  No impact anticipated during this outage.

 

 

J System:

See attached J System schematic.

 

 

P-1 System - Pipeline Outage: TBD 2024 - approximately 4 days

During this outage MR00075 - GLASTONBURY (HARTFORD,CT) will be unavailable for flow.

 

 

Q-1 System - Detailed Investigations VS5C:  August 9 - October 11

AGT will be conducting detailed investigations on it's Q-1 System in VS5C.  No impact anticipated during this outage.

 

 

Meter Station Outages:

AGT will be conducting maintenance at the following meter stations.  During the timeframes listed in the table below each meter will be unavailable:

 

Begin	End	Station
Sept 24	Sept 30	MR00271 - EVERETT INT. (MIDDLESEX,MA)
TBD 2024	TBD 2024	MR00820 - WALLINGFORD ENERGY INTERCONNECT (FAIRFIELD,CT)
Sept 21	Sept 22	MR00051 - NATIONAL GRID-SAGAMORE (BARNSTABLE,MA)
Sept 19	Sept 20	MR00806 - CANAL GENERATING

 

 

Algonquin DOT Pipeline Integrity Project

 

Tool Runs:

As part of AGT's comprehensive integrity assessment of its pipeline system AGT will be conducting cleaning and in-line inspection tool runs on various lines throughout its system.  As a result of these in-line inspections, certain locations could be identified for an investigation which could lead to possible reduction of capacity.  Should any of these investigations lead to a reduction of capacity, AGT will post on the bulletin board as soon as it is known. 

 

AGT utilizes specific ILI tools designed by vendors to inspect for a certain type of threat that may exist on the pipeline.  Depending on the type of the tool and in order to successful collect the data, the tool may need to be run a specific speed which determines the impact on pipeline capacity during the run.  Furthermore, each tool has a different size and length depending on the tool type and vendor.  Launcher and receivers, and other pipeline facilities may need to be modified in order to launch, receive and run the tool along the pipeline to ensure a successful run.  Occasionally, combination tools, which are tools utilized to investigate multiple threats simultaneously, do exist for various pipe sizes and vendors.  Since combinations do not exist for every pipe size or threat, there may be multiple tool runs needed for a particular segment which creates variability in the outage schedule timeframes.  The following list contains the more common tool types AGT utilizes and associated threat that the tool generally inspects the pipeline for.  This is not an exhaustive list and there may be other exceptions for the types of threat each tool type looks for.

 

 

MFL-A	Internal/External Corrosion
Inertial Mapping Unit or IMU	Geohazard/Pipe Strain
Caliper	Dents/Obstructions
EMAT	Stress Corrosion Cracking
MFL-C	Selective Seam Weld Corrosion
MFL-HS	Hard Spots

 

Listed below are the pipeline segments scheduled for cleaning and/or in-line inspection this year which will have an impact on operational capacity.  Please refer to the operational capacity matrix for any mainline capacities impacts.  Inspections which have meter impacts and/or other operational impacts are denoted with "%" and details of the impacts are located details above.

 

	Pipeline Section:	Type	Cleaner Date:	Caliper Date:	ILI Date:	Results / Potential Repair Date:
	G-3 System*	MFL-A	9/14	TBD	TBD	TBD
	G-5 System*	MFL-A	9/12	TBD	TBD	TBD
	G-12L System*	MFL-A	10/3	TBD	TBD	TBD
	Weymouth/EOL	MFL-A	TBD 2024	TBD	TBD	TBD
	L30B Cromwell to Burrillville	MFL-A	TBD	TBD	TBD	TBD

 

 

 

AGT Tentative Future Tool Runs

As part of AGT's comprehensive integrity assessment program of its pipeline system, the following pipeline segments have been tentatively scheduled for cleaning and/or in-line inspection in the upcoming years. This work will have an impact on operational capacities during the tool run and may potentially impact capacities to appropriately remediate any identified anomalies. The following list is not an exhaustive list of upcoming tool runs on the AGT system and furthermore the tool runs below, and associated timeframes are subject to change.

 

Pipeline Section:	Type:	Timeframe:
J-1 Sec 1	Cleaner	TBD 2024
J-1 Sec 2	Cleaner	TBD 2024
J-1 Sec 1	MFL-C	TBD 2024
J-1 Sec 1	MFL-A	TBD 2024
J-1 Sec 2	MFL-C	TBD 2025
J-1 Sec 2	MFL-A	TBD 2025

 

 

Scheduled Investigations:

As a result of AGT's comprehensive integrity assessment of its pipeline system, the following locations have been identified as requiring additional evaluation which may require a reduction of capacity.  Should any of these investigations lead to a reduction of capacity, AGT will post on the bulletin board as soon as it is known:

 

Burrillville to EOL (24")

E-1 System

G-1 System (12/16")

G-1L System (20")

G-12L System (24")

G-2 System

Hanover to Stony Point (26")

Lambertville to Hanover (26")

I-1 System (12")

J-1 System (22/24/26")

Stony Point to Southeast (26")

 

 

 

Customer Entitlements* by Station and Date

This section represents the aggregate customer entitlements for the various date ranges throughout this upcoming summer season.

 

*Entitlements as of March 1, 2021