February 20, 2018
Included below is the maintenance schedule for Southern Natural Gas Company, L.L.C. (“Southern”) for 2018. 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
3. Lower than normal pressures may be experienced
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
North System February/March/April 2018 Maintenance
1. Southern will be conducting maintenance pigging on the North Alabama line in Segment 100 on 3-20-18 and 3-22-18. Customers may experience lower than normal pressure during these pigging operations.
2. Southern will be conducting pipeline hydro testing on the 24" 2nd North Main Line on the east side of Tarrant compressor station on 3-30-18 to 5-31-18. Posted segment 130 capacity of 563 Mdth/d could be reduced as much as 288 Mdth/d.
As a result of this testing, IT and Out of Path could be impacted during this testing.
3. Southern will be conducting remediation on the 2nd North main line west of our Tarrant compressor station on 3-26-18 to 5-31-18. Segment 110 capacity of 636 Mdth/d could be impacted up to 250 Mdth/d. This project is being done at the same time as the Hydro test east of our Tarrant compressor station on the 2ndNML. As a result of this remediation, IT and Out of Path could be impacted during this remediation.
4. Southern will be conducting remediation on the Marietta Branch line in Segment 510 in the April/May timeframe, dates TBD. Customers may experience lower than normal pressures during this remediation.
5. Spring Storage Field Shut-in tests - The Muldon Storage Field shut-in test will begin on Tuesday, April 3rd, and continue through Monday, April 9th. The Bear Creek Storage Field shut-in test will begin on Tuesday, April 24th, and continue through Monday, May 1st.
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.
6. Southern will be conducting remediation on the 2nd North main line from our Pickens compressor station to our Louisville compressor station on 4-10-18 to 5-31-18. Customers may see lower than normal pressure during this remediation. Depending on the results, certain receipt or delivery points may have to shut in during the repairs. We will provide advance notice to affected operators and customers if there are any such impacts during the remediation.
South System February/March/April 2018 Maintenance
7. Southern will be conducting maintenance on a unit at our Gwinville compressor station on 3-19-18 to 8-10-18. Segment 410 capacity of 1,658 Mdth/d could be reduced as much as 68 Mdth/d. We do not anticipate an impact to customers at this time.
8. Southern will be conducting maintenance pigging on the 20" Thomaston-Griffin 2nd Loop line in Segment 500 on 3-15-18, 3-20-18, and 3-22-18. Customers may experience lower than normal pressure during these pigging operations.
9. Southern will be conducting remediation on the Havana loop line in Segment 700 on 3-21-18 to 3-29-18. Customers may see lower than normal pressures during this remediation.
10. Southern will be conducting maintenance at our Holy Trinity compressor station on 4-1-18 to 5-31-18. Segment 650 capacity of 127 Mdth/d could be impacted up to 25 Mdth/d. We do not anticipate an impact to customers at this time.
11. Southern will be conducting pipeline maintenance on the 30" South Main 2nd Loop line east of our Thomaston compressor station on 4-2-18 to 6-15-18. We do not anticipate an impact to customers at this time.
12. Southern will be conducting remediation on Line-01 Main north of our Albany compressor station on 4-2-18 to 4-14-18. Segment 660 capacity of 103 Mdth/d could be impacted up to 18 Mdth/d. We do not anticipate an impact to customers at this time.
13. Southern will be conducting maintenance pigging on the South Main loop line east of our Ocmulgee compressor station on 4-2-18 to 4-6-18. Customers may experience lower than normal pressures during the pigging operations.
14. Southern will be conducting pipeline maintenance on the 30" Riverdale line in Segment 500 and 510 on 4-7-18 to 4-10-18. We will be coordinating this work with the customer's outage.
Customers on the Marietta line may see lower than normal pressures during this maintenance.
15. Southern will be conducting maintenance pigging on the Auburn Grantville loop line in Segment 460 on 4-9-18 and 4-10-8. Customers may experience lower than normal pressures during this pigging operation.
16. Southern will be conducting maintenance at the International Paper meter station (PIN 936400) on 4-10-18 to 4-12-18. We will be coordinating this maintenance during the customer's planned outage.
17. Southern will be conducting maintenance pigging on the Phoenix City Columbus line in Segment 490 on 4-11-18 and 4-12-18. Customers may experience lower than normal pressures during this pigging operation.
18. Southern will be conducting unit maintenance at our Thomaston compressor station on 4-2-18 to 5-31-18. Segment 490 capacity of 1,547 Mdth/d could be reduced as much as 180 Mdth/d.
19. Southern will be conducting remediation on the South Main line from our Wrens compressor station to Aiken on 4-17-18 to 4-30-18. Customers may see lower than normal pressures during this remediation.
20. Southern will be conducting pipeline maintenance on our South Main line east of our Ocmulgee compressor station on 4-20-18 to 4-27-18. Segment 530 capacity of 849 Mdth/d could be impacted up to 99 Mdth/d. We do not anticipate an impact to customers at this time.
21. Southern will be conducting unit maintenance at our Auburn compressor station on 4-23-18 to 5-21-18. We do not anticipate an impact to customers at this time.
South Louisiana February/March/April 2018 Maintenance
22. Southern continues to conduct maintenance on the Main Pass Franklinton Loop line north of our Toca compressor station through the second quarter of 2018. We do not anticipate an impact to customers at this time.
23. Southern will be conducting maintenance pigging on the 24”/30” White Castle Franklinton loop line on 2-26-18 to 3-2-18, 3-6-18, 3-8-18, 3-13-18, 3-19-18 to 3-23-18, 3-26-18, and 3-27-18. Posted Segment 350 capacity of 701 Mdth/d may be impacted up to 150 Mdth/d during the pigging operations.
24. Southern will be conducting unit maintenance at our White Castle and Shadyside compressor stations on 4-1-18 to 10-30-18. We will also be conducting pipeline maintenance and a pressure test on the White Castle Franklinton loop line starting 5-1-18 through 9-15-18. Segment 340 capacity of 701 Mdth/d will be impacted up to 150 Mdth/d.
25. Southern will be conducting maintenance pigging on the Duck Lake Franklinton line 4-16-18, 4-19-18, and 4-23-18. We do not anticipate an impact to customers at this time.
North System Maintenance the Remainder of 2018
26. Southern will be conducting maintenance pigging on the 6" Rome Calhoun line in Segments 150 and 170, Calhoun Tap to Rome on 5-22-18 and 5-23-18. Customers may experience lower than normal pressures during these pigging operations.
27. Southern will be conducting maintenance pigging on the North Main line east of our Louisville compressor station on 6-20-18, 6-26-18, and 6-28-18. We do not anticipate an impact to customers at this time.
28. Southern will be conducting pipeline maintenance on the 10" TCI line in Segment 120 on 7-16-18 to 8-3-18. We do not anticipate an impact to customers at this time.
29. Southern will be conducting maintenance on a unit at our McConnell's compressor station in August, dates TBD. We do not anticipate an impact to customers at this time.
30. Southern will be conducting a pressure test on the 12" TCI loop line in Segment 120 on 8-6-18 to 9-7-18. We do not anticipate an impact to customers at this time.
31. Southern will be conducting maintenance pigging on the 20” Tuscaloosa Supply line in Segment 90 on 8-14-18 and 8-15-18. Customers may experience lower than normal pressures during these pigging operations.
32. Southern will be conducting maintenance on a unit at our Onward compressor station on 9-4-18 to 10-5-18. Segment 30 capacity of 203 Mdth/d could be reduced as much as 27 Mdth/d. We do not anticipate an impact to customers at this time.
33. Southern will be conducting pipeline maintenance on the Bessemer Calera loop line in Segment 120 on 9-10-18 to 9-28-18. We do not anticipate an impact to customers at this time.
34. Southern will be conducting maintenance pigging on the 10” TCI line in Segment 120 on 9-18-18 and 9-19-18. Customers may see lower than normal pressures during these pigging operations.
35. Southern will be conducting pipeline hydro testing on the 24" 2nd North Main Line on the east side of Tarrant compressor station on 10-1-18 to 10-31-18. Posted segment 130 capacity of 563 Mdth/d could be reduced as much as 288 Mdth/d. IT and Out of Path service could be impacted depending on demand requirements.
36. Southern will be conducting pipeline remediation on the 2nd North Main line between our Louisville and McConnell's compressor stations on 10-01-18 to 10-31-18. Segment 50 capacity of 160 Mdth/d could be reduced as much as 28 Mdth/d. We do not anticipate an impact to customers at this time.
37. Fall Storage Field Shut-in tests - The Muldon Storage Field shut-in test will begin on Tuesday, October 2nd and continue through Monday, October 8th. The Bear Creek Storage Field shut-in test will be scheduled in the 4th quarter, dates TBD.
38. Southern will be conducting maintenance at the Logansport and Bienville compressor stations in the fall time frame, dates 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.
39. Southern will be conducting pipeline maintenance on the Bessemer Calera line and loop line in Segment 120 in the last half of the year, dates TBD. We do not anticipate an impact to customers at this time.
South System Maintenance the Remainder of 2018
40. Southern will be conducting remediation on the South Main loop line from our Ellerslie compressor station to our Ocmulgee compressor station on 4-30-18 to 5-13-18. Customers may see lower than normal pressures during this remediation.
41. Southern will be conducting maintenance pigging on the South Main line east of our Elmore compressor station on 5-1-18 and 5-3-18. Customers may experience lower than normal pressures during these pigging operations.
42. Southern will be conducting maintenance pigging on the South Main line east of our Ellerslie compressor station on 5-7-18 to 5-18-18, exact dates TBD. Customers may experience lower than normal pressures during the pigging operations.
43. Southern will be conducting remediation on the Wrens Savannah line, Wrens to Port Wentworth on 5-14-18 to 5-27-18. We do not anticipate an impact to customers at this time.
44. Southern will be conducting a pressure test on the 18 " South Main loop line east of our Elmore compressor station on 6-4-18 to 6-22-18. We do not anticipate an impact to customers at this time.
45. Southern will be conducting maintenance on a unit at our Ocmulgee compressor station on 6-25-18 to 10-31-18. Segment 530 ending capacity of 804 Mdth/d could be impacted up to 109 Mdth/d during this maintenance.
46. Southern will be conducting maintenance on a unit at our Enterprise compressor station on 7-23-18 to 8-24-18. We do not anticipate an impact to customers at this time.
47. Southern will be conducting maintenance pigging on Line 40 South Decatur/Line 43 North Clay in Segment 670 on 8-20-18 to 8-24-18. Customers may experience lower than normal pressures during the pigging operations.
48. Southern will be conducting maintenance pigging on the South Main line east of our Selma compressor station on 9-10-18 to 9-21-18. Customers may experience lower than normal pressures during the pigging operations.
49. Southern will be conducting maintenance on a unit at our Gallion compressor station on 9-10-18 to 10-26-18. Segment 460 capacity of 2,273 Mdth/d could be reduced as much as 146 Mdth/d.
50. Southern will be conducting pipeline maintenance on the Macon Branch line in Segment 530 during the week of 10-8-18 to 10-12-18. This will require a two-three day outage and we will be coordinating this with the customers.
51. Southern will be conducting unit maintenance at our Pavo compressor station in the last half of the year, dates TBD. We do not anticipate an impact to customers at this time.
52. Southern will be conducting pipeline maintenance on Line 01 Main in October, dates TBD. Customers may see lower than normal pressures in Segments 655, 660, and 670.
53. Southern will be conducting pipeline maintenance on the Englehard line 17 in Segment 670 in September, dates TBD. We will be utilizing a stopple by-pass during this project and do not anticipate an impact to customers at this time.
South Louisiana System Maintenance the Remainder of 2018
54. Southern will be conducting maintenance pigging on the Erath South Section 28 line in Segment 340 on 5-8-18 to 5-10-18. Customers may experience lower than normal pressure during these pigging operations.
55. Southern will be conducting pipeline maintenance on the South Section 28 line in Segment 340 southwest of our White Castle compressor station in the fall timeframe, dates TBD. We anticipate approximately a two week outage. During the outage, SNG will not be able to accept receipts on the South Section 28 line. Receipts south of our White Castle compressor station in segment 340 will still be able to flow.
56. Southern will be conducting remediation near our Franklinton compressor station on the Main Pass Franklinton line, loop line, and 2nd loop in the last half of the year, dates TBD. We will also conduct remediation on the Franklinton Gwinville line, loop line, and 2nd loop line during this period. We do not anticipate an impact to customers at this time.
57. Southern will be conducting pipeline maintenance on the 20" Duck Lake Franklinton line in the fall, dates TBD. Segment 350 Capacity of 701 Mdth/d could be reduced as much as 51 Mdth/d. We do not anticipate an impact to customers at this time.
EEC 2018 Maintenance
58. EEC will be conducting maintenance work at the Hartwell compressor station between April 12th and April 16th. The outage window will be for 5 days encompassing a weekend. During this time flow through the Hartwell compressor station will be restricted.
As a result, all services could be impacted depending on system demand. EEC is attempting to minimize the overall impact to customers by scheduling this outage over a weekend and coordinating with interconnects.
59. Southern will be conducting maintenance pigging on the Elba Express line from our Hartwell compressor station to our Wrens compressor station on 6-26-18 and 6-28-18. Customers may see lower than normal pressures during these pigging operations.
Monthly postings and associated con calls/WebEx will be conducted monthly throughout the year to inform shippers/operators of scheduled work for the following months. Typically, the monthly WebEx is the 3rd Wednesday of the month at 1:30 p.m. CCT, 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 Gina Mabry (713) 420-3685.