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TSP/TSP Name:  6900518-SOUTHERN NATURAL GAS CO. Critical: Y
Notice Type Desc (1):  MAINTENANCE Notice Type Desc (2):  MAINTENANCE
Notice Eff Date/Time:  04/18/2017 1:04:51PM Notice End Date/Time:  12/31/2049 9:00:00AM
Post Date:  4/18/2017 1:04:51 PM Notice ID: 701056
Reqrd Rsp:  1 Notice Stat Desc:  INITIATE Prior Notice: 
Subject:  April/May/June-2017 Maintenance Projects
Notice Text:




Included below is the maintenance schedule for Southern Natural Gas Company, L.L.C. (“Southern”) for 2017. It is being placed on Southern's electronic bulletin board (EBB) to allow our customers advance notice of scheduled work and to assist our customers in planning their business.

 

Anticipated impacts are estimates. Actual nominations, market demand, weather and pipeline conditions, etc. will determine if, and through what level, restrictions become necessary. Unless otherwise stated, all scheduled dates represent gas days as defined in the Southern Tariff to mean a period of twenty-four consecutive hours, beginning and ending at 9:00 a.m. (Central Clock Time). Scheduled dates are subject to change. Projects may be added, altered, delayed or cancelled. SNG will provide notice of such additions or changes via EBB Postings. Updates as posted on Southern's EBB should be deemed correct in the event of conflicts between subsequent updates posted on the EBB and dates within this monthly notice.

 

Please note that at any time maintenance is being performed, IT, secondary firm service and hourly flexibility could be impacted depending on demand downstream of the subject maintenance. Also at times primary firm service could be impacted. This will be noted in the project descriptions below if known in advance or posted on the EBB as we become aware.

 

Color Key for projects:

Yellow

1.      Restrictions are possible

2.      With extended duration, restrictions could be necessary from time to time

Red

1.      Restrictions are probable. While Southern has highlighted the work it anticipates is most likely to have an impact on customers, we ask that you read the entire posting each month and call Gas Control to discuss any other items of interest or concern.

 

Please note that we have expanded this report to include all pigging operations for the year..

 

General Information
Southern will be conducting Compressor Station maintenance throughout the year and some impact to the level of service is possible. Please note the heaviest maintenance periods are normally April through May and September through October.  These timeframes are historically the lowest periods of demand on the system.

Southern will also be conducting various pipeline projects on its system throughout the year. The projects include pipeline integrity work (facility modifications and inspections on various sections of the pipeline), expansion work, class location upgrades, all pigging, and other miscellaneous projects.

 

Unscheduled Maintenance

 

1.      "Force Majeure Segment 580

As set forth in Critical Notice 700897, and previous postings, Southern experienced a release of natural gas and damage to its 20"" Wrens-Savannah 2nd Loop Line near Millen, GA on October 8, 2016.  Southern has repaired the damage but is required to operate the Wrens-Savannah 2nd Loop Line at a lower operating pressure, which reduces the capacity, until an investigation is complete and the line can be returned to full service in a safe manner.  Southern has determined that, out of the abundance of caution, testing on segments encompassing the entire 20” Wrens-Savannah line will need to be made. Southern will post its next update no later than April 20, 2017.  Southern estimates the outage could continue into July 2017.

As set forth in Critical Notice 700504, this unplanned outage constitutes an event of Force Majeure under Section 8.3 of the General Terms and Conditions of SNG's FERC Gas Tariff until further notice.  

SNG is working diligently to return this line to full service.

 

 North System April/May/June 2017 Maintenance

 

2.      Southern is conducting unit maintenance at our Pell City compressor station return to service is 5-5-17.  We do not anticipate an impact to customers at this time.

3.      Southern is conducting a pressure test on the North Main Loop line east of our McConnell's compressor station 3-27-17 to 5-31-17.  Posted segment 120 capacity of 643 Mdth/d could be reduced as much as 90 Mdth/d.  We will be coordinating with the affected point operators during this project.

4.      Southern will be conducting remediation on the Gadsden Branch Loop line,  Pell City to Gadsden, from     4-17-17 to 9-21-17,  We do not anticipate an impact to customers at this time.

5.      Southern will be conducting pipeline maintenance on the 12” Chattanooga Branch line, 12” Chattanooga Branch Loop line, and the 6" Rome-Calhoun line starting 4-24-17 to 6-9-17. We do not anticipate an impact to customers at this time.

6.      Southern will be conducting station maintenance at our Onward compressor station 5-2-17 to 5-5-17.  We do not anticipate an impact to customers at this time.

7.      Southern will be conducting maintenance on a unit at our Onward compressor station starting 5-8-17 to 6-2-17.  Segment 30 capacity of 203 Mdth/d could be reduced as much as 45 Mdth/d.  We do not anticipate an impact to customers at this time.

8.      Southern will be conducting maintenance pigging on the North Main line east of our Reform compressor station on 5-2-17 and 5-4-17.  We do not anticipate an impact to customers at this time.

9.      Southern will be conducting maintenance pigging on the Rome Calhoun line segment, Calhoun Tap to Rome 5-16-16 to 5-17-17. Customers may experience lower than normal pressure during these pigging operations.

10.  Southern will be conducting maintenance pigging on the North Main line west of our Tarrant compressor station on 5-31-17 and 6-1-17.  We do not anticipate an impact to customers at this time.

11.  Southern will be conducting maintenance pigging on the North Main line west of our Tarrant compressor station on 6-27-17 thru 6-29-17.  We do not anticipate an impact to customers at this time.

12.  Southern will be conducting maintenance on the Cordova line tap off of the North Main System in the 2nd or 3rd quarters, dates TBD.  We do not anticipate an impact to customers at this time.

13.  Spring Storage Field Shut-in tests - The Bear Creek Storage Field shut-in test will begin on Tuesday, April 18th, and continue through Monday, April 24th.  

 

 As a result of the shut-in test, Southern will reduce each CSS customer's DIQ and DWQ on a pro-rata basis. Each CSS customer will be allocated  sixty-four percent (64%) during the Bear Creek shut-in test. This reduced level is subject to change, if necessary, during the test. Please be aware that this temporary reduction in DIQ and DWQ will affect not only CSS service, but also will affect related injection/withdrawal capacity under no-notice firm transportation (MFN) service.

 

 

South System April/May/June 2017 Maintenance

 

14.  Southern is conducting unit maintenance at our Elmore compressor station from 4-3-17 to 4-28-17.  Segment 460 capacity of 2271 Mdth/d could be reduced as much as 170 Mdth/d.  We do not anticipate an impact to customers at this time.

15.  Southern will be conducting maintenance at Plant Talbot County meter station (PIN-913800) 4-24-17 to 4-28-17.  We will be coordinating this work with the affected point operator.

16.  Southern is conducting maintenance on a unit at our Thomaston compressor station thru 5-5-17.  Segment 10 capacity of 1545 Mdth/d could be reduced as much as 200 Mdth/d.  We do not anticipate an impact to customers during either timeframe this work could be scheduled.

17.  Southern is conducting pipeline maintenance on the South Main 3rd Loop line east of our Hall Gate compressor station in central Georgia. Posted Segment 560 capacity of 719 Mdth/d could be reduced as much as 14 Mdth/d. This will take place 5-1-17 to 5-2-17.    We do not anticipate an impact to customers at this time.

18.  Southern is conducting a Hydro-test on the South Main line east of our Hall Gate compressor station 4-4-3 to 5-15-17.  Segment 560 capacity of 719 Mdth/d could be reduced as much as 75 Mdth/d. 

 We do not anticipate an impact to customers at this time.

19.  Southern will be conducting maintenance on a unit at our Ocmulgee compressor station 4-24-17 to 5-12-17.  Segment 540 & 560 capacity of 800 Mdth/d could be reduced as much as 105 Mdth/d.  We do not anticipate an impact to customers during either timeframe this work could be scheduled.

20.  Southern is conducting maintenance pigging on the Ocmulgee Atlanta line segment-Ocmulgee to Bass Junction 4-18-17 and 4-19-17.  We do not anticipate an impact to customers at this time.

21.  Southern is conducting pipeline maintenance on the South Main line, South Main Loop line, and the South Main 2nd Loop line east of our Gwinville compressor station, one line at a time, 4-17-17 to 6-2-17.  Segment 410 capacity of 1800 Mdth/d could be reduced up to 25 Mdth/d during this maintenance. We do not anticipate an impact to customers at this time.

22.  Southern will be conducting remediation on the Wrens Savannah Loop line 5-15-17 to 5-20-17.  We do not anticipate an impact to customers at this time.

23.  Southern will be conducting maintenance on a unit at our Wrens compressor station 5-3-17 to 6-9-17.  Segment 570 & 580 capacity of 735 Mdth/d could be reduced as much as 169 Mdth/d.  We do not anticipate an impact to customers.

24.  Southern will be conducting remediation on the South Main Loop line east of our Enterprise compressor station 5-8-17 to 5-13-17.  Customers may experience lower than normal pressure during the remediation project.

25.  Southern will be conducting a Hydro-test on the South Main line east of our Bay Springs compressor station 6-5-17 to 7-31-17.  Segment 420 capacity of 1,675 Mdth/d could be reduced as much as 95 Mdth/d to 1,580 Mdth/d.  We do not anticipate an impact to customers at this time.

26.  Southern will be conducting maintenance pigging on the South Colquitt line in southwest Georgia on 6-6-17 and 6-8-17.  Customers may see lower than normal pressure during these pigging operations.

27.  Southern will be conducting remediation on the Southeastern Clay line east of our Wrens compressor station from 6-12-17 to 6-24-17.  We do not anticipate an impact to customers at this time.

28.  Southern will be conducting remediation on the South Main Loop line west of our Auburn compressor station from 6-27-17 to 7-8-17.  We do not anticipate an impact to customers at this time.

29.  Southern will be conducting maintenance pigging on the South Main 3rd Loop line east of our Hall Gate compressor station in the 2nd or 3rd quarters, dates TBD.  We do not anticipate an impact to customers at this time.

30.  Southern is conducting pipeline maintenance on our Thomasville line 14 in Grady County, Ga. in the 3rd quarter, dates TBD. We do not anticipate an impact to customers at this time.

 

South Louisiana April/May/June 2017 Maintenance

 

31.  Southern is conducting maintenance on 7 units at White Castle one at a time, from 3-6-17 to 10-31-17.  Posted Segment 350 Capacity of 701 Mdth/d could be reduced as much as 150 Mdth/d thru the duration of this maintenance.

32.  Southern will be conducting maintenance pigging on the Main Pass Franklinton loop line  4-25-17 and 4-26-17.  We do not anticipate an impact to customers at this time.

33.  Southern will be conducting maintenance pigging on the Franklinton Gwinville 2nd Loop line North of our Franklinton compressor station on 4-24-17 and 4-27-17.  We do not anticipate an impact to customers at this time.

34.  Southern will be conducting pipeline maintenance on the Franklinton Gwinville loop line, Franklinton Gwinville 2nd loop line, and the Duck Lake Franklinton line north of our Franklinton compressor station in the June/July time frame, dates TBD.  We do not anticipate an impact to customers at this time.

35.  Southern will be conducting a hydro-test on the Main Pass Franklinton Loop line North of our Toca compressor station 6-15-17 to 7-31-17.  We do not anticipate an impact to customers at this time.

36.  Southern will be conducting maintenance pigging on the 16" Erath line, Sabine to Sea Robin in the 2nd or 3rd quarters, dates TBD.  Customers may see lower than normal pressures during this pigging operation.

37.  Southern will be conducting maintenance pigging on the 20" Erath to South Section 28 line in the 2nd or 3rd quarters, dates TBD.  Customers may see lower than normal pressure during this pigging operation.

38.  Southern will be conducting maintenance pigging on the 20" South Section 28 to White Castle in the 2nd or 3rd quarters, dates TBD.  Customers may see lower than normal pressure during this pigging operation.

 

Elba Island/EEC April/May/June 2017 Maintenance

39.  Elba Island will be conducting pump maintenance 4-19-17 to 4-23-17.  This will result in no available send out from the facility during this maintenance.  There will be another pump maintenance outage that will result in no available send out for a 5 day period from the facility in May, dates to be determined.

 

 

North System Maintenance the remainder of 2017

 

40.  Southern will be conducting maintenance pigging on the Logansport Loop line east of our Bienville compressor station on 7-10-17, 7-13-17, and 7-17-17.  Customers may see lower than normal pressures during these pigging operations.

41.  Southern will be conducting remediation on the North Main Loop line west of our Tarrant compressor station 7-10-17 to 7-22-17.  Segment 130 capacity of 563 Mdth/d could be reduced as much as 4 Mdth/d.  We do not anticipate an impact to customers at this time.

42.  Southern will be conducting maintenance at our Providence compressor station 8-7-17 to 9-29-17.  Segment 120 capacity of 643 Mdth/d could be reduced as much as 57 Mdth/d.  We do not anticipate an impact to customers based on the current estimated project timeline.

43.  Southern will be conducting maintenance at our Rankin compressor station resulting in a station outage from 9-4-17 to 9-29-17.  Segment 400 capacity of 234 Mdth/d could be reduced as much as 159 Mdht/d going south.  There will be no restrictions flowing north. 

44.  Southern will be conducting pipeline maintenance on the North Main line at the Black Warrior river crossing east of our McConnell's compressor station in western Alabama the week of 9-11-17.   We do not anticipate an impact to customers at this time.

45.  Southern will be conducting maintenance on the North Main line, North Main loop line, and the 2nd North Main line east of our McConnell's compressor station 9-11-17 to 10-13-17.  Segment 110 capacity of 631 Mdth/d could be reduced as much as 16 Mdth/d.  We do not anticipate an impact to customers at this time.

46.  Southern will be conducting maintenance at our Bear Creek facility on a dehydration unit in September and October, dates TBD.  Withdrawal will be limited to 600 Mdth/d. We do not anticipate an operational impact to customers at this time.

47.  Southern will be conducting pipeline maintenance on the 2nd North Main line west of our McConnell's compressor station in the October timeframe, dates TBD.  Segment 110 capacity of 631 Mdth/d could be reduced as much as 352 Mdth/d.  We do not anticipate an impact to customers given the current estimated timeline of the maintenance.

48.  Southern will be conducting maintenance at our Bell Mills compressor station in September/October, dates TBD.  Segment 170 capacity of 232 Mdth/d could be reduced as much as 109 Mdth/d.  Pressures could be lower than normal.  We will schedule this during a low flow period in the Fall.

49.  Southern will be conducting maintenance at the Logansport and Bienville compressor stations in the September to October time frame, date TBD. This will require both stations to be out of service for 8-12 hours.  Producers will most likely have to shut in during this outage.

50.  Southern will be conducting pipeline maintenance on the Marietta Branch line in the last half of the year, dates TBD.  We do not anticipate an impact to customers at this time.

51.  Southern will be conducting remediation on the West Point Loop line in the 3rd quarter, dates TBD.  We do not anticipate an impact to customers at this time.

52.  Southern will be conducting unit maintenance at our Rome compressor station during the 3rd quarter, dates TBD.  Segment 180 capacity of 158 Mdth/d could be reduced as much as 74 Mdth/d.  We do not anticipate an impact to customers given the current estimated timeline of this maintenance.

53.  Southern will be conducting maintenance at the Alagasco-Central Roebuck meter station(PIN-825700) during the last half of the year, dates TBD.  This may result in a pressure restriction during the maintenance activity but Southern will coordinate with the affected point operator.

54.  Fall Storage Field Shut-in tests - The Muldon Storage Field shut-in test will begin on Tuesday, October 3rd and continue through Monday, October 9th. The Bear Creek Storage Field shut-in test will begin on Tuesday, October 17th and continue through Monday, October 23rd.  

 

 As a result of the shut-in test, Southern will reduce each CSS customer's DIQ and DWQ on a pro-rata basis. Each CSS customer will be allocated thirty- six percent (36%) of its currently effective DIQ and DWQ posted on the EBB during the Muldon shut-in test and sixty-four percent (64%) during the Bear Creek shut-in test. This reduced level is subject to change, if necessary, during the test. Please be aware that this temporary reduction in DIQ and DWQ will affect not only CSS service, but also will affect related injection/withdrawal capacity under no-notice firm transportation (MFN) service

 

South System Maintenance the remainder of 2017

 

55.  Southern will be conducting pipeline maintenance on the Graniteville Mills line in Aiken County, South Carolina.  This maintenance will be 7-1-17 to 7-9-17 and will be coordinated with the affected point operator's outage. 

56.  Southern will be conducting maintenance at International Paper meter station (PIN-936400)-6-10-17 to 6-17-17.  We are coordinating this with the affected point operator's outage.

57.  Southern will be conducting a Hydro-test on the South Main line east of our York compressor station 7-17-17 to 8-18-17.  We do not anticipate an impact to customers at this time.

58.  Southern will be conducting pipe maintenance on the Cypress line in the July timeframe, dates TBD.  We do not anticipate an impact to customers at this time.

59.  Southern will be conducting pigging on the 20” Wrens Savannah 2nd Loop line in the August timeframe, dates TBD.  Customers may experience lower than normal pressure during the pigging operation.

60.  Southern will be conducting maintenance on 2 units one at a time at our Pearl River compressor station in the 3rd quarter, dates TBD.  We do not anticipate an impact at this time.

61.  Southern will be conducting maintenance Plant Washington County (Tiger Creek) meter station (PIN-930100) in the 2nd or 3rd quarter, dates TBD.  We will be coordinating this work with the affected point operator.

62.  Southern will be conducting maintenance at the AGL- Hazlehurst meter station (PIN-919400) in the 2nd or 3rd quarters, dates TBD.  We will be coordinating this work with the affected point operator.

63.  Southern will be conducting maintenance on a unit at our Enterprise compressor station in the September/October timeframe, dates TBD.  We do not anticipate an impact to customers at this time.

64.  Southern will be conducting maintenance on two units, one at a time, at our Bay Springs compressor station in the fall timeframe, dates TBD.  We do not anticipate an impact to customers at this time.

65.  Southern will be conducting maintenance on a unit at our Gallion compressor station in the fall timeframe, dates TBD.  Segment 460 capacity of 2,271 Mdth/d could be reduced as much as 244 Mdth/d. We do not anticipate an impact to customers at this time.

66.  Southern will be conducting maintenance on a unit at our Auburn compressor station in the Fall timeframe, dates TBD.  Segment 480 & 650 capacity of 1938 Mdth/d could be reduced as much as 229 Mdth/d.  We do not anticipate an impact to customers during either timeframe this work could be scheduled.

67.  Southern will be conducting maintenance on a unit at our Ellerslie compressor station in the Fall timeframe, dates TBD.  Segment 490 capacity of 1,545 Mdth/d could be reduced as much as 69 Mdth/d.  We do not anticipate an impact to customers at this time.

 

 

68.  Southern will be conducting maintenance on a unit at our Ocmulgee compressor station in September/October, dates TBD.  Segment 540 & 560 capacity of 800 Mdth/d could be reduced as much as 105 Mdth/d.  We do not anticipate an impact to customers during either timeframe this work could be scheduled.

69.  Southern will be conducting maintenance on a unit at our Wrens compressor station in the September/October timeframe, dates TBD.  Segment 570 & 580 capacity of 735 Mdth/d could be reduced as much as 169 Mdth/d.  We do not anticipate an impact to customers.

70.  Southern will be conducting pipeline maintenance on LINE-01 Main Line north of our Albany compressor station in the September/October timeframe, dates TBD.  We do not anticipate an impact to customers at this time.

71.  Southern will be conducting maintenance at West Georgia meter station, Plant Addison (PIN-916300), dates TBD.  We do not anticipate an impact to customers at this time but will coordinate with the affected point operator.

72.  Southern will be conducting maintenance at Unadilla #1 meter station (PIN-000381)-in the last half of the year.  We will be coordinating this work with the affected point operator.

 

South Louisiana System Maintenance the remainder of 2017

 

73.  Southern will be conducting maintenance pigging on the Main Pass Franklinton Loop line from our Toca compressor station to Highway 90 on 8-8-17, 8-9-17, and 8-10-17.  We do not anticipate an impact to customers at this time.

74.  Southern will be conducting maintenance pigging on the Franklinton Gwinville Loop line, from our Pearl River compressor station to our Gwinville compressor station, on 8-14-17 to 8-17-17.  We do not anticipate an impact to customers at this time.

75.  Southern will be conducting maintenance pigging on the Main Pass Franklinton 2nd Loop line, Lacombe to Hwy 36 on 9-19-17 and 9-21-17.  We do not anticipate an impact to customers at this time.

76.  Southern will be conducting pipeline maintenance on the South Section 28 line southwest of our White Castle compressor station 9-25-17 to 10-13-17. During the outage, SNG will not be able to accept receipts on the South Section 28 line from Sea Robin (PIN #605300), Sabine (PIN #605200, and Boardwalk (PIN #607000).  Receipts south of our White Castle compressor station in segment 340 (from the Shady Side area) will still be able to flow on the east leg.

77.  Southern will be conducting remediation on the South Section 28 line southwest of our White Castle compressor station from 9-18-17 to 9-21-17.  Customers may experience lower than normal pressures during the remediation.

78.  Southern will be conducting pipeline maintenance on the Duck Lake Franklinton line, Shady Side to White Castle, in the September and October timeframe, dates TBD.  We do not anticipate an impact to customers at this time.

79.  Southern will be conducting maintenance pigging on the 20" South Section 28 to White castle line during the month of October, 2017, date TBD.  Customers may experience lower than normal pressures during this pigging operation.

80.  Southern will be conducting maintenance at the SNG/FGT West meter station, Washington Parish (PIN-605600) later in the year, dates TBD.  We do not anticipate an impact to customers at this time but will be coordinating this maintenance with the affected point operator.

 

 

 

 

Monthly postings and associated con calls/WebEx will be conducted monthly throughout the year to inform shippers/producers of scheduled work for the following months. Typically, the monthly WebEx is the 3rd Wednesday of the month but it will be posted in advance. Southern will post updates on the critical notices bulletin board anytime there are significant changes to timing and/or service impacts of these projects.

 

If you have any questions, call Kal Dankovich at (713) 420-7522, Jimmy Reese (713) 420-7310, Daniel Mitchell (713) 420-5874, or Ganesh Venkateshan (713) 420-2099.