El Paso Pipeline Maintenance Summary

El Paso Pipeline Maintenance Summary This document lists major maintenance and construction shutdowns that are being planned on the EPNG pipeline system for the next 12 to 15 months. The purpose of this posting is to make customers aware of proposed outages that will affect throughput on the various systems of the pipeline. Dates may change based on changing business conditions or to coordinate with outages on interconnecting pipelines. Comments regarding alternate dates are welcome. This document is not intended to be an official notice. When shutdowns are finalized, they will be posted as Informational Postings, found on the El Paso Natural Gas Company Home Page. Refer to those notices for current shutdowns. This Shutdown Schedule will normally be updated weekly or by special edition if warranted. Please refer to the revision date. El Paso Natural Gas Co. Shutdown Schedule dates are tentative and subject to change. See EBB notices for finalized dates and impacts. Revised: 7/13/2018 Questions? Contact Vic Villalva 719-520-4251 **Possible immediate remediation - a placeholder on the schedule for possible outage for immediate remediation based on an ILI (inline inspection, smart pig) assessment report. The outage (remediation) may or may not take place depending on the report findings. If the report states that an immediate remediation must take place, EPNG will post an update for the impact to the system as soon as possible.tbd (To Be Determined SJ= San Juan Basin - NM=North ML - SM=South ML - XO=San Juan Crossover - PR=Permian YU=Yuma - PHX=Phoenix - HX=Havasu Crossover - AN=Anadarko Start Date End Date Location Unit Description Reduction in System MMcf/d 11/7/2013 12/31/2018 WINDOW 3A Window Rock 3A repair pending 22 NM 11/11/2013 12/31/2018 CAP 1A Caprock 1A mechanical repair pending 50 XO 1/1/2014 12/31/2018 AFTON 2A Afton 2 mechanical repair pending 65 SM 1/1/2014 12/31/2018 ROSWELL 1A Roswell 1A repair pending 10 XO 6/10/2014 12/31/2018 AFTON 1A Afton 1 repair pending 65 SM 1/1/2015 12/31/2018 CASA GRANDE 2C Casa Grande 2C repair pending 65 SM 7/21/2015 12/31/2018 WILLIAMS 4B Williams 4B repair pending 10 NM 12/1/2015 12/31/2018 LEUPP 1A Leupp 1A repair pending 7 NM 12/1/2015 12/31/2018 LEUPP 7A Leupp 7A mechanical repair pending 7 NM

1/1/2016 12/31/2018 EL PASO CD 2D El Paso 2D repair pending 0 SM T 2/26/2016 12/31/2018 LEUPP 6A Leupp 6A repair pending 10 NM 8/4/2016 12/31/2018 MONUMENT 1B Monument 1B Repair Pending 20 SM 11/10/2016 12/31/2018 WINDOW 3B White Rock 3B repair pending 15 NM 11/30/2016 12/31/2018 SAN SIMON 3A San Simon 3 repair pending 50 SM 12/16/2016 12/31/2018 WINDOW 1A Window Rock 1A repair pending 22 NM 3/7/2017 8/31/2018 DUMAS SOUTH 3A Dimmitt 3A repair pending 30 AN 9/8/2017 12/31/2018 LEUPP 9A Leupp 9A repair pending 10 NM 2/21/2018 8/3/2018 KEYSTONE 1A Keystone 1A repair 40 PR 4/2/2018 8/31/2018 WINDOW 6A Window Rock 6A repair 22 NM 5/18/2018 12/31/2018 WINDOW 6B Window Rock 6B repair 22 NM 6/7/2018 7/20/2018 PECOS RIVER 2A Pecos River 2A repair 32 SM 6/11/2018 7/20/2018 KEYSTONE 1B Keystone 1B repair 45 PR 6/19/2018 7/20/2018 HUECO 3A Hueco 3A maintenance 80 SM 6/27/2018 6/28/2018 GRESHAM Gresham Station Annual DOT/ESD Test 80 SM 6/27/2018 12/31/2018 DIMMITT 2 Dimmitt 2 repair 10 AN 7/6/2018 7/20/2018 FLAGFF - 1201 Line 1201 pipeline hydro test MLV 25 to Leupp 95 NM 7/10/2018 7/12/2018 MOJAVE 1,2,3A Mojave Unit(s) maintenance 1 unit at a time 39 MOJ 7/10/2018 7/12/2018 ODESSA 31110 L31110 pipeline maintenance Pecos Trail Receipt /Delivery 60 PR (DPECSTRL ) Shut in 7/12/2018 7/20/2018 FLAGFF - 1201 Line 1201 pipeline remediation Williams to MLV 37 50 NM 7/17/2018 7/19/2018 WILLIAMS Williams Station maintenance 330 NM 7/17/2018 7/20/2018 WINDOW 1B Window Rock 1B inspection 37 NM 7/18/2018 7/19/2018 ODESSA 3082 Line 3082 maintenance pig Goldsmith to Keystone Field 0 PR 7/18/2018 7/18/2018 LINCOLN Lincoln Station Annual DOT/ESD Test 70 XO 7/19/2018 7/22/2018 DEMING 1103 Line 1103 smart pig El Paso to Afton 261 SM 7/20/2018 8/9/2018 FLAGFF - 1200 Line 1200 pipeline hydro test MLV 25 to Leupp 150 NM 7/23/2018 7/23/2018 DEMING 1103 Line 1103 smart pig El Paso to Afton 261 SM 7/23/2018 7/27/2018 SELIGMAN SELIGMAN Seligman Station maintenance 174 NM 7/24/2018 7/24/2018 NAVAJO Navajo C & D Station maintenance 210 NM

7/24/2018 7/25/2018 LEUPP 2A Leupp 2A inspection 8 NM 7/24/2018 7/26/2018 HUECO 2A Hueco 2A maintenance 32 SM 7/24/2018 7/27/2018 KEYSTONE 6A Keystone 6A inspection 33 PR 7/24/2018 7/27/2018 WINDOW 4B Window Rock 4B inspection 15 NM 7/30/2018 10/13/2018 FLORIDA 1 Florida 1A maintenance 56 SM 7/31/2018 8/3/2018 RIO VI 2A Rio Vista 2A maintenance 99 SJ 8/2/2018 8/3/2018 BELEN Belen Station Annual DOT/ESD Test 70 XO 8/7/2018 8/9/2018 MOJAVE 1,2,3A Mojave Unit(s) maintenance 1 at a time 39 MOJ 8/7/2018 8/7/2018 SAN JUAN 1219 Line 1219 maintenance pig Chaco to White Rock 0 SJ 8/7/2018 8/9/2018 AFTON 3 Afton Unit 3 inspection 65 SM 8/7/2018 8/10/2018 BONDAD 2A Bondad 2A maintenance 95 SJ 8/8/2018 8/8/2018 DEMING 1103 Line 1103 smart pig El Paso to Afton 261 SM 8/8/2018 8/8/2018 SAN JUAN 1202 Line 1202 maintenance pig Blanco to White Rock pressures 0 SJ will be higher 8/9/2018 8/9/2018 DEMING 1103 Line 1103 smart pig El Paso to Afton 261 SM 8/9/2018 8/10/2018 LAGUNA A Laguna Station Annual DOT/ESD Test 97 XO 8/13/2018 8/14/2018 LEUPP 3B Leupp 3B maintenance 10 NM 8/13/2018 8/14/2018 LEUPP 11A Leupp 11A maintenance 10 NM 8/13/2018 8/24/2018 Flag-West- 1200 Line 1200 pipeline maintenance Flagstaff to Williams 100 NM 8/14/2018 8/14/2018 ODESSA 3162 Line 3162 maintenance pig Keystone to Waha 0 PR 8/14/2018 8/16/2018 DUTCH FLATS 2A Dutch Flats 2A inspection 33 HX 8/14/2018 8/17/2018 RIO VI 3A Rio Vista 3A maintenance 99 SJ 8/15/2018 8/15/2018 WILLIAMS 1C Williams 1C maintenance NM 8/20/2018 9/1/2018 TOPOCK- L1200 Line 1200 pipeline hydro test Hackberry to MLV 45 136 NM MOJAVE 8/21/2018 8/22/2018 LEUPP 10A Leupp 10A inspection 10 NM 8/21/2018 8/21/2018 SAN JUAN 3222/3201 Line 3201 maintenance Pig Rio Vista to San Juan Station 0 SJ pressures will be higher 8/21/2018 8/21/2018 SAN JUAN 3222/3201 Line 3222 maintenance Pig Rio Vista to San Juan Station 0 SJ pressures will be higher 8/21/2018 8/24/2018 WINDOW 2B Window Rock 2B inspection 13 NM 8/28/2018 8/28/2018 HACKBERRY Hackberry Station electrical inspection 142 NM 8/28/2018 8/30/2018 PECOS RIVER 3A Pecos River 3 inspection 32 SM 8/29/2018 8/29/2018 HACKBERRY Hackberry Station electrical inspection 142 NM 8/29/2018 8/29/2018 CASA GRANDE 1C Casa Grande 1C inspection 114 SM 8/31/2018 8/31/2018 ODESSA 3006 Line 3006 maintenance pig Goldsmith to Keystone Field 0 PR 9/5/2018 9/6/2018 LEUPP 3A Leupp 3A inspection 2 NM

9/6/2018 9/6/2018 ODESSA 1600 Line 1600 maintenance pig Waha to Gresham 0 SM 9/7/2018 9/7/2018 ODESSA 1115 Line 1115 maintenance pig Goldsmith to L1102 0 PR 9/10/2018 9/14/2018 EL PASO CD 4D El Paso 4D inspection 42 SM T 9/10/2018 9/24/2018 CARLSBAD 1103 Line 1103 pipeline remediation Pecos River to MLV 9 0 SM PIPE 9/11/2018 9/13/2018 MOJAVE 1,2,3A Mojave Unit(s) maintenance 1 at a time 39 MOJ 9/11/2018 9/11/2018 EUNICE C 3C Eunice 3C mechanical Inspection no flow at ITEXNEUN 0 PR (377034) during this maintenance only. Alternate scheduling location IWAREUNI 9/17/2018 9/28/2018 SAN JUAN 1202 Line 1202 pipeline hydro test Blanco to Rio Vista 0 SJ 9/18/2018 9/21/2018 KEYSTONE Keystone Station Annual DOT/ESD Test 600 PR 9/18/2018 9/18/2018 ODESSA 3028 Line 3028 maintenance pig Goldsmith to Keystone Field 0 PR 9/18/2018 9/18/2018 ODESSA 3161 Line 3161 maintenance pig Mobil Coyanosa to Waha 0 PR 9/18/2018 9/19/2018 LEUPP 5A Leupp 5A inspection 2 NM 9/18/2018 9/21/2018 AINS 1103 Line 1103 pipeline remediation Keystone to Pecos 0 SM 9/19/2018 9/21/2018 LEUPP 2B Leupp 2B inspection 10 NM 9/25/2018 10/2/2018 ODESSA 1103 Line 1103 pipeline remediation Pecos to Guadalupe 0 SM 9/26/2018 9/27/2018 WINK Wink Station Annual DOT/ESD Test 141 PR 9/27/2018 9/28/2018 ODESSA 3173 Line 3153 maintenance pig Terrell to Puckett 0 PR 10/1/2018 10/5/2018 BLACK RIVER 1 Black River 1 inspection 95 SM 10/2/2018 10/2/2018 WENDEN 2A Wenden 2A inspection 39 HX 10/2/2018 10/4/2018 KEYSTONE 8A Keystone 8A inspection 35 PR 10/2/2018 10/5/2018 WINDOW 2A Window Rock 2A inspection 22 NM 10/3/2018 10/3/2018 ROSWELL Roswell Station Annual DOT/ESD Test 65 XO 10/3/2018 10/3/2018 ALAMO LAKE 1A Alamo Lake 1A inspection 75 HX 10/9/2018 10/11/2018 MOJAVE 1,2,3A Mojave Unit(s) maintenance 1 at a time 39 MOJ 10/9/2018 10/12/2018 WINDOW 6A Window Rock 6A inspection 37 NM 10/9/2018 10/12/2018 GUADALUPE Guadalupe Station DOT/ESD Test 273 SM 10/9/2018 10/12/2018 WINK 3 Wink 3 inspection 104 SM 10/10/2018 10/12/2018 PICACHO 1,2,3A Picacho Station Annual DOT/ESD Test 0 PHX 10/15/2018 11/9/2018 CORNUDAS 3A Cornudas 3A inspection 80 SM 10/16/2018 10/19/2018 KEYSTONE 2A Keystone 2A inspection 44 PR 10/16/2018 10/16/2018 DUTCH FLATS 1A Dutch Flats 1A shut down checks 62 HX 10/16/2018 10/16/2018 TOM MIX 1A Tom Mix 1A inspection 43 SM 10/16/2018 10/16/2018 DAGGETT Daggett Station reliability test must run 0 MOJ

10/17/2018 10/17/2018 DUTCH FLATS 2A Dutch Flats 2A shut down checks 33 HX 10/17/2018 10/17/2018 BONDAD 2A Bondad 2A inspection 95 SJ 10/18/2018 10/18/2018 DUTCH FLATS Dutch Flats Station Annual DOT/ESD Test 100 HX 10/18/2018 10/18/2018 BONDAD 1B Bondad 1B inspection 95 SJ 10/23/2018 10/26/2018 KEYSTONE 2B Keystone 2B inspection 70 PR 10/26/2018 10/26/2018 ODESSA 3105/3104 maintenance pig Line 3105 to L3104 0 PR 10/29/2018 11/10/2018 PHOENIX 1203 Line 1203 pipeline hydro test MLV 5 to MLV 5 1/2 0 MRC 10/31/2018 10/31/2018 ODESSA 2000 Line 2000 Wink to Black River 0 PR 11/1/2018 11/1/2018 ODESSA 2000 Line 2000 maintenance pig Black River to Guadalupe 0 PR 11/1/2018 11/8/2018 WASHINGTON Washington Ranch Fall BHP Survey no injection or withdrawal 250 SM RANCH 11/2/2018 11/2/2018 ODESSA 3173 Line 3173 maintenance pig Puckett to Waha 0 PR 11/5/2018 11/5/2018 ODESSA 3160 Line 3160 maintenance pig Mobil Coyanosa to Waha 0 PR 11/5/2018 11/23/2018 WAHA COMP 2 Waha 2 Solar maintenance 40 SM 11/6/2018 11/8/2018 MOJAVE 1,2,3A Mojave Unit(s) maintenance 1 at a time 39 MOJ 11/13/2018 11/13/2018 LORDSBURG 1C Lordsburg 1C inspection 42 SM 11/13/2018 11/16/2018 WILLIAMS 3B Williams 3B maintenance 100 NM 11/14/2018 11/16/2018 LORDSBURG 1B Lordsburg 1B inspection 46 SM 11/20/2018 11/20/2018 FLORIDA 1C Florida 1C inspection 42 SM 11/27/2018 11/27/2018 CORNUDAS 1C Cornudas 1C inspection 42 SM 11/28/2018 11/28/2018 ALAMO LAKE 2A Alamo Lake 2A inspection 100 HX 11/29/2018 11/29/2018 CORNUDAS 2C Cornudas 2C inspection 42 SM 12/3/2018 12/3/2018 EL PASO CD 4D El Paso 4D inspection 42 SM T 12/4/2018 12/6/2018 MOJAVE 1,2,3A Mojave Unit(s) maintenance 1 at a time 39 MOJ 12/4/2018 12/6/2018 KEYSTONE 5A Keystone 5A inspection 40 PR 12/4/2018 12/7/2018 WINK 1 Wink 1 inspection 104 PR 12/11/2018 12/13/2018 LEUPP 4B Leupp 4B inspection 11 NM 12/11/2018 12/11/2018 DAGGETT Daggett Station reliability Test MUST RUN 0 MOJ 12/11/2018 12/11/2018 EUNICE C 3C Eunice 3C mechanical Inspection no flow at ITEXNEUN 0 SM (377034) during this maintenance only. Alternate scheduling location IWAREUNI 12/11/2018 12/13/2018 KEYSTONE 10A Keystone 10A inspection 40 PR 12/11/2018 12/13/2018 PECOS RIVER 1A Pecos 1A inspection 35 SM

12/13/2018 12/13/2018 ODESSA 3114 L3114 maintenance pig higher pressures 0 PR 12/18/2018 12/19/2018 LEUPP 11A Leupp 11A inspection 10 NM 12/28/2018 12/28/2018 ODESSA 3114 Line 3105/3104 maintenance pig to Sweetie Peck Junction 0 PR 12/28/2018 12/28/2018 ODESSA 3137 Line 3137 maintenance pig Benedum to Sweetie Peck higher pressures 0 PR