ࡱ>  l \pThe Free Software Foundation B=PF0*8X@"1 Helvetica1Courier1 Courier New1 Courier New1 Helvetica$#,##0_);($#,##0)$#,##0_);[Red]($#,##0)$#,##0.00_);($#,##0.00)$#,##0.00_);[Red]($#,##0.00)-**_($* #,##0_);_($* (#,##0);_($* "-"_);_(@_)*)'_(* #,##0_);_(* (#,##0);_(* "-"_);_(@_)5,2_($* #,##0.00_);_($* (#,##0.00);_($* "-"??_);_(@_)2+/_(* #,##0.00_);_(* (#,##0.00);_(* "-"??_);_(@_)2$#,##0.00;[Red]$#,##0.003$#,##0.00;[Red]($#,##0.00)4$#,##0;[Red]($#,##00)50.00%;[Red](0.00%)6 0%;[Red](0%)7#,##0.00;[Red](#,##0.00)8#,##0;[Red](#,##0)                + ) , *   Ј ~~ ؈ ~~#؈ ~~"؈ ~~ ؈ ~~8#܈ ~~9#܈ ~~3#܈ ~~7#܈ ~~83ffff̙̙3f3fff3f3f33333f33& For the transition period from &QUESTAR GAS COMPANY MEETS THE C%GLOSSARY OF TERMSUMIncome Statementd Balance Sheet{Balance Sheet (1)7 Cash FlowsЮNote 3 Operating Revenue#DNote 3 Operating Revenue (1)jNote 4 Income Taxes%Note 5 Fair Value Measurements%Note 5 Fair Value Measurem (1)&=Recurring Fair Value Measuremen&pRecurring Fair Value Measur (1)&Fair Value of Financial Instrum0Volumes&3&Fair Value and Gains and Losses& ;Fair Value and Gains and Lo (1)&HNote 7 Regulatory Assets and Li&QaCredit Facilities and Shortterm&lNote 13 RelatedParty Transactio&zThe Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE>NO TITLEf NO TITLE (1) NO TITLE (2) NO TITLE (3) l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } $} $4}       QUESTAR GAS CO 10-Q 08/02/2018)!For the transition period from to Commission File Number0 (Exact name of registrant as specified in I.R.S. Employer  its charter, address of Identification Number 3 +principal executive office and registrant?s  telephone number    333-69210QUESTAR GAS COMPANY 87-0155877333 SOUTH STATE STREET"SALT LAKE CITY, UTAH 84145(801) 324-5000$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/0Z{oc?~;G=PF0*8X> @ l  $#$  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from GLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } y } $ } :} $ }  $     QUESTAR GAS CO 10-Q 08/02/2018kcQUESTAR GAS COMPANY MEETS THE CONDITIONS SET FORTH IN GENERAL INSTRUCTION H(1)(a) AND (b) OF FORM 1 Page     Number        Glossary of Terms ~        % PART I. Financial Information  Item 1.Financial Statements~ Item 2.,$Management?s Discussion and Analysis~ N80of Financial Condition and Results of OperationsItem 4.Controls and Procedures~ Z"PART II. Other InformationItem 1.Legal Proceedings~ ^Item 1A. Risk Factors~ ^Item 6.Exhibits~ bD lE9-!cCEYOk/ !"# $!____________________________1")Created by Morningstar Document Research.0#(http://documentresearch.morningstar.com/ <=PF0*8X> @##""!! l  p"2=GL  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } *} $ } I; p     QUESTAR GAS CO 10-Q 08/02/2018GLOSSARY OF TERMSAbbreviation or Acronym Definition    2017 Tax Reform Act 5 -An Act to Provide for Reconciliation Pursuant  7 /to Titles II and V of the Concurrent Resolution  6 .on the Budget for Fiscal Year 2018 (previously  3 +known as The Tax Cuts and Jobs Act) enactedon December 22, 2017 ARO#Asset retirement obligation bcfBillion cubic feet CEOChief Executive OfficerCERCLA-%Comprehensive Environmental Response,/'Compensation and Liability Act of 1980,also known as Superfund CET$Conservation enabling tariff CFOChief Financial Officer DEQPS2*Dominion Energy Questar Pipeline Services, Inc.Dls. SzVU1\8o !"#$%&'()*+,-./0123456789:;<=>?    !DES!&!Dominion Energy Services, Inc."""#Dominion Energy#0#(The legal entity, Dominion Energy, Inc.,$$4$,one or more of its consolidated subsidiaries%%.%&(other than Dominion Energy Questar or&&.&&Questar Gas) or operating segments, or''1')the entirety of Dominion Energy, Inc. and((%(its consolidated subsidiaries)))*Dominion Energy Gas*7*/The legal entity, Dominion Energy Gas Holdings,++9+1LLC, one or more of its consolidated subsidiaries,,0,(or operating segment, or the entirety of--1-)Dominion Energy Gas Holdings, LLC and its..!.consolidated subsidiaries///0Dominion Energy Questar010)The legal entity, Dominion Energy Questar1141,Corporation, one or more of its consolidated22-2%subsidiaries (other than Questar Gas)3303(or operating segment, or the entirety of44/4'Dominion Energy Questar Corporation and55%5its consolidated subsidiaries666+7#Dominion Energy Questar Combination717)Dominion Energy?s acquisition of Dominion88-8%Energy Questar completed on September9979/16, 2016 pursuant to the terms of the agreement::1:)and plan of merger entered on January 31,;;~ ;<<<(= Dominion Energy Questar Pipeline=.=&Dominion Energy Questar Pipeline, LLC,>>5>-one or more of its consolidated subsidiaries,??2?*or the entirety of Dominion Energy QuestarDX ls~4{.i9d{U1@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_@@7@/Pipeline, LLC and its consolidated subsidiariesAAA BDthBB DekathermCCC DEEPD!DEnergy-efficiency programEEE FEPAF,F$U.S. Environmental Protection AgencyGGG HGAAPH5H-U.S. generally accepted accounting principlesIIIJGas InfrastructureJ2J*Gas Infrastructure Group operating segmentKKK LGHGLLGreenhouse gasMMMNIdaho CommissionN)N!Idaho Public Utilities CommissionOOO PIRCAP/P'Intercompany revolving credit agreementQQQ RLNGRRLiquefied natural gasSSS TMD&AT,T$Management?s Discussion and AnalysisUU8U0of Financial Condition and Results of OperationsVVVW Questar GasW,W$The legal entity Questar Gas CompanyXXX YSECY*Y"Securities and Exchange CommissionZZZ[Utah Commission[)[!Public Service Commission of Utah\\\ ]VIE] ]Variable interest entity^^^_Virginia Power_/_'The legal entity, Virginia Electric andD lY5b e0 D t <a`abcdefghijklmno``6`.Power Company, one or more of its consolidatedaa.a&subsidiaries or operating segments, orbb3b+the entirety of Virginia Electric and Powercc1c)Company and its consolidated subsidiariesdddeWexproe0e(The legal entity, Wexpro Company, one orff.f&more of its consolidated subsidiaries,gg1g)or the entirety of Wexpro Company and itshh!hconsolidated subsidiariesiiijWyoming Commissionj)j!Wyoming Public Service Commissionkl$m____________________________1n)Created by Morningstar Document Research.0o(http://documentresearch.morningstar.com/$,dR~Z=PF0*8X> @oonnmm l  c  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMS Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } $4} $ }  } $ }  }  $ } } $ }  } $      QUESTAR GAS CO 10-Q 08/02/2018Income StatementThree Months Ended Six Months Ended  June 30,   June 30,  ~   ~   ~   ~    (millions)                Operating Revenue (1) ,a@   fffffva@   @   Ā@  Operating Expenses               Purchased gas (1)~ *R@  Yt@   s@,$Other operations and maintenance (1)A@LF@   T@   33333U@%Depreciation and amortization333332@0@  fffffB@   Y@@ Other taxes333333@ffffff@  ffffff)@   &@ Total Operating Expenses`@fffffa@  |@   33333{@%Income (loss) from operations333333@ ~  b   YV@ Other income~ ~   ?   ~  ( Interest and related charges (1)!@!@  2@   ~ F3+Income (loss) from operations before income~ ~   Q@   R@ tax expense$Income tax expense (benefit)ffffff  .@   ffffff<@Net Income (Loss)ffffff fffff&L@  ~  $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/BuXt P'O[`IU`=PF0*8X> @            l  (wz  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome StatementBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } 1} $ }  } $ }  } $ (                                 QUESTAR GAS CO 10-Q 08/02/2018 Balance SheetJune 30, December 31,  ~    2017 (1)   (millions)         ASSETS         Current Assets        ! Cash and cash equivalents  @   @ ,$Customer receivables (less allowanceQ@fffffve@/'for doubtful accounts of $2.1 and $1.7)Other receivables?@Affiliated receivables??/'Inventories at lower of average cost ormarket: Gas stored333333<@33333sJ@Materials and suppliesL7@3333339@Regulatory assets@0@ Other (2)ffffff@333333@Total current assets`@~ j%Property, Plant and Equipment%Property, plant and equipment@fffffç@1)Accumulated depreciation and amortizationfffffN0(Total property, plant and equipment, net̕@@)!Deferred Charges and Other Assets0(Pension and other postretirement benefit33333s[@fffffZ@ assets (2)Dzlw;O:~]J:0I ! " # $ % & '  Other   2@    )@ /!'Total deferred charges and other assets!!! `@!!!!]@!" Total assets""33333@"""@"#$$%____________________________1&)Created by Morningstar Document Research.0'(http://documentresearch.morningstar.com/xl`8=PF0*8X> @Z ''&&%%""""     l  +q  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance Sheet Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } U5} $ }  } $ }  } $ +                                 QUESTAR GAS CO 10-Q 08/02/2018 Balance SheetJune 30, December 31,  ~    2017 (1)   (millions)         LIABILITIES AND EQUITY         Current Liabilities        & Securities due within one year  $-  ~  Short-term debtP@~ %Affiliated current borrowings7@~ .Accounts payable33333<@fffffJ@+#Accrued interest, payroll and taxes333338@333333/@Payables to affiliatesK@33333Q@Regulatory liabilitiesL@#@Contract liabilities&@L1@ Otheř@@333333;@!Total current liabilitiesr@@@Long-Term DebtI@33333@.&Deferred Credits and Other LiabilitiesDeferred income taxesXp@Aq@Regulatory liabilities~ ~  Other (2)l[@fffffZ@4,Total deferred credits and other liabilitiesy@ʼn@Total liabilities@Ҟ@/'Commitments and Contingencies (see Note~ .D#lw;:A(qhQ2+ ! " # $ % & ' ( ) *  Equity        *!"Common stock - par value $2.50 (3)!!~ !^!!!~ !^!""Additional paid-in capital"""q@""""q@"#Retained earnings###fffff^~@####z@#)$!Total common shareholder's equity$$$33333k@$$$$̨@$2%*Total liabilities and shareholder's equity%%33333@%%%@%&'$(____________________________1))Created by Morningstar Document Research.0*(http://documentresearch.morningstar.com/jH~=PF0*8X> @Z **))((%%%%     l  ,/  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1)Note 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } $4} $ }  } $ }  } $ ,                                 QUESTAR GAS CO 10-Q 08/02/2018 Cash Flows!Six Months Ended June 30,~ ~   (millions)         Operating Activities          Net income  fffff&L@  ~  . &Adjustments to reconcile net income to        2 *net cash provided by operating activities:%Depreciation and amortizationfffffB@Y@@Deferred income taxes333330<@,$Other adjustments for non-cash itemsɿ?3+Changes in operating assets and liabilitiesb@~ 1)Net cash provided by operating activitiesffffffl@fffffe@Investing Activities/'Property, plant and equipment purchasedfffff[R Other?-%Net cash used in investing activitiesfffff[RFinancing Activities)!Repayment of short-term debt, net`X~ "Issuance of long-term debt~ Z -#Repayment of long-term debt~ " -3+Repayment of affiliated current borrowings,33333I~ j net Other --%Net cash used in financing activities33333]~ f( Decrease in cash and equivalentsDQlz P'gK.` ! " # $ % & ' ( ) * + - %Cash, restricted cash and equivalents   @    ffffff@ "!at beginning of period (1)-"%Cash, restricted cash and equivalents""@"""@"#at end of period (1)*$"Supplemental Cash Flow Information$$$$$$$$1%)Significant noncash investing activities:%%%%%%%%$&Accrued capital expenditures&&333333*@&&&2@&'($)____________________________1*)Created by Morningstar Document Research.0+(http://documentresearch.morningstar.com/c= u=PF0*8X> @Z ++**))&&&&""""   l  m  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } 0.} $ }  } $ }  } $                             QUESTAR GAS CO 10-Q 08/02/2018!Note 3. Operating RevenueThree Months EndedSix Months Ended    June 30, 2018    June 30, 2018   (millions)         Regulated gas sales:          Residential  ,V@  ~ "   Commercial   333333@@    fffff\@  Industrialffffff?333333 @$Regulated gas transportation@ffffff+@Other regulated revenue?@&Other nonregulated revenue (1)333333@ffffff"@.&Total operating revenue from contracts̼`@Ѐ@with customers Other revenue @~ Total operating revenue,a@@$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/: wk*&m4}=PF0*8X> @Z      l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } +} $ } U} $ } U} $                       QUESTAR GAS CO 10-Q 08/02/2018!Note 3. Operating RevenueThree Months EndedSix Months Ended    June 30, 2017    June 30, 2017   (millions)        , $Residential and commercial gas sales ~    H@  Industrial gas sales   @    333333@  Gas transportation   333333@    ffffff*@  Other (1) @0@Total operating revenuefffffva@Ā@$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/.wk{wkC=PF0*8X> @Z      l  C  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1) Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } 0} $ }  } $} $ }  } $                       QUESTAR GAS CO 10-Q 08/02/2018Note 4. Income Taxes!Six Months Ended June 30,~ ~  U.S. statutory rate  ~ V %  ~  %. &Increases (reductions) resulting from:        + #State taxes, net of federal benefit    @    @ 0 (Reversal of excess deferred income taxes       -  State legislative change   ffffff    -  Other, net333333ӿ -Effective tax rate5@ % C@ %$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/./|pzM'=PF0*8X> @* l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } a} $ } } $ } $} $ } $} $ } } $ } U} $      QUESTAR GAS CO 10-Q 08/02/2018'Note 5. Fair Value Measurements Fair ValueValuation TechniquesUnobservable Input     Range Weighted    (millions)            Average (1) Assets                 Physical forwards:                 Natural gas (2)  333333@   Discounted cash flow  Market price (per Dth) ~    1.7 - 3.4   @   Total assets  333333@             $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/*h}qet% =PF0*8X> @J      l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } } $ } y } $ } } $ }       QUESTAR GAS CO 10-Q 08/02/2018'Note 5. Fair Value Measurements Significant UnobservablePositionChange to InputImpact on Fair Value Inputs       Measurement  Market price  Buy  Increase (decrease)   Gain (loss)  Market price  Sell  Increase (decrease)   Loss (gain)  $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/&@}qeifZN&=PF0*8X> @ l  =  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } } $      QUESTAR GAS CO 10-Q 08/02/2018)!Recurring Fair Value MeasurementsLevel 1Level 2  Level 3   Total  (millions)                 At June 30, 2018                 Assets:                  Derivatives:                  Commodity  $-   $-   333333@   333333@  Total assets $- $-  333333@  333333@At December 31, 2017     Assets:      Derivatives:      Commodity $- $-  333333@  333333@ Total assets $- $-  333333@  333333@$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/6 {oc(P0X=PF0*8X> @        l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } 6} $ } U} $ } U}  $ } U} $ }  } $      QUESTAR GAS CO 10-Q 08/02/2018)!Recurring Fair Value Measurements#Three Months Ended June 30, ! Six Months Ended June 30,  ~   ~   ~   ~    (millions)                 Beginning balance  ffffff?      333333@   $- 5 -Total realized and unrealized gains (losses):                 Included in earnings (1)   -    -    ?     1)Included in regulatory assets/liabilities@~    ?  333333ӿ Settlements - -     ? 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" # $  !$"____________________________1#)Created by Morningstar Document Research.0$(http://documentresearch.morningstar.com/ P=PF0*8X> @$$##""       l  G  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } -} $      QUESTAR GAS CO 10-Q 08/02/2018A9Fair Value and Gains and Losses on Derivative Instruments2*Amount of Gain (Loss) Recognized in Income   on Derivatives (1)  # Three Months Ended June 30,  ! Six Months Ended June 30, - %Derivatives not designated as hedging ~   ~   ~   ~    instruments  (millions)                -%Derivative Type and Location of Gains      (Losses) Commodity (2) $- $-  ?   Total $- $-  ?  $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/2jocWK3jS}u =PF0*8X> @         l  *\|`  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } 1} $ } U} $ } U} $ *                                 QUESTAR GAS CO 10-Q 08/02/20181)Note 7. Regulatory Assets and LiabilitiesJune 30, December 31,  ~   ~    (millions)         Regulatory assets:        $ Pipeline integrity costs (1) ~    ~    EEP (2)   ffffff?    ffffff @ Deferred royalties (3)? -$Purchased gas adjustment (4) -ffffff%@ Other -333333?!Regulatory assets-current@0@)!Deferred production imbalance (5)@ -#Cost of reacquired debt (6)@@$Pipeline integrity costs (1)333333?333333?( Regulatory assets-noncurrent (7)333333@ffffff @Total regulatory assets*@fffff3@Regulatory liabilities:$Purchased gas adjustment (4)?@ $-CET (8)%@@1)Cost-of-service impact of 2017 Tax Reform333333#@ -Act (9)+#Cost of plant removal and AROs (10)@@ Other333333??&Regulatory liabilities-currentL@#@.&Income taxes refundable through futurefffffn@̜n@D,lsg[%3+$l@FO ! " # $ % & ' ( )   rates (11)+!#Cost of plant removal and AROs (10)!!!h@!!!~ ! ! 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Related-Party Transactions#Three Months Ended June 30, ! Six Months Ended June 30,  ~   ~   ~   ~    (millions)                + #Affiliated operator service fee (1)  33333N@   S@   p`@   33333sc@ 0 (Transportation and storage services from   1@    L1@    B@    33333sB@  affiliates (1),$Services provided by related partiesffffff,@333333&@   <@  fffff5@,$Services provided to related parties?ffffff?   @  333333@$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/.yma5_|bZRF:=PF0*8X> @j         l  ь  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty TransactioResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } '} $ }  } $ }  }  $ } } $                              QUESTAR GAS CO 10-Q 08/02/2018'The Corporate and Other Segment Gas Corporate   Consolidated    Infrastructure    and Other   Total  (millions)            (  Three Months Ended June 30, 2018             Operating revenue  ,a@   $-   ,a@  Net loss   ffffff    -    ffffff ( Three Months Ended June 30, 2017    Operating revenuefffffva@ $-  fffffva@ Net income (loss)ffffff?    &Six Months Ended June 30, 2018    Operating revenue@ $-  @ Net income (loss)@L@ɿ   fffff&L@ &Six Months Ended June 30, 2017    Operating revenueĀ@ $-  Ā@ Net income (loss)̌J@ffffff  ~   $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/<d }qeMTP@0ui]5=PF0*8X> @           l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } 0} $      QUESTAR GAS CO 10-Q 08/02/2018Results of OperationsSecond Quarter   Year-To-Date  ~   ~    $ Change  ~   ~    $ Change   (millions)                         Net income (loss)  ffffff      333333 @   fffff&L@  ~    $@   $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/&C@{oz=PF0*8X> @            l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } '} $ }  } $ }  }  $ } } $ }  } $ }  } $ } U} $      QUESTAR GAS CO 10-Q 08/02/2018Analysis of OperationsSecond Quarter   Year-To-Date  ~   ~    $ Change  ~   ~    $ Change   (millions)                         Operating revenue  ,a@   fffffva@   ffffff   @   Ā@   @   Purchased gas  ~ *    R@        Yt@    s@    !@   Net revenue   33333O@     P@        Pk@    yk@     ( Other operations and maintenanceA@LF@   333333"   T@33333U@333333%Depreciation and amortization333332@0@   @  fffffB@Y@@ffffff@ Other taxes333333@ffffff@   ffffff?  ffffff)@&@? Other income~ ~     -  ?~  ɿInterest expense!@!@   ?  2@~ F?$Income tax expense (benefit)ffffff   ?  .@ffffff<@~ $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/6zn\$~"z=PF0*8X> @            l  41s  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of Operations SIGNATURE NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } } $ } y< 4     QUESTAR GAS CO 10-Q 08/02/2018ITEM 6. EXHIBITSExhibit Number Description    @ 2 *Amended and Restated Consolidated Articles  / 'of Incorporation of Questar Gas Company  2 *(Exhibit 3.1, Form 8-K filed May 15, 2012,   File No. 333-69210) . @0(Bylaws of Questar Gas Company, effective1)as of October 17, 2016 (Exhibit 3.2, Form0(10-Q for the quarter ended September 30,:22016 filed November 9, 2016, File No. 333-69210) . 31.a0(Certification by Chief Executive Officer6.of Questar Gas Company pursuant to Section 3020(of the Sarbanes-Oxley Act of 2002 (filed herewith). 31.b0(Certification by Chief Financial Officer6.of Questar Gas Company pursuant to Section 3020(of the Sarbanes-Oxley Act of 2002 (filed herewith).~ 4,Certification to the Securities and Exchange0(Commission by Chief Executive of OfficerD: lt7t&w*dvH$6 !"#$%&'()*+,-./0123  . &and Chief Financial Officer of Questar!!1!)Gas Company as required by Section 906 of""1")the Sarbanes-Oxley Act of 2002 (furnished### herewith).$$$~ %%/%'The following financial statements from&&.&&Questar Gas Company?s Quarterly Report''3'+on Form 10-Q for the quarter ended June 30,((0((2018, filed on August 2, 2018, formatted))/)'in XBRL: (i) Statements of Income, (ii)**0*(Balance Sheets, (iii) Statements of Cash++:+2Flows, and (iv) the Notes to Financial Statements.,,,---.../0$1____________________________12)Created by Morningstar Document Research.03(http://documentresearch.morningstar.com/,|i}3Mc?3'=PF0*8X> @332211 l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS NO TITLE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } } $ } 8      QUESTAR GAS CO 10-Q 08/02/2018 SIGNATUREQUESTAR GAS COMPANY    (Registrant)    August 2, 2018  /s/ Michele L. Cardiff   Michele L. Cardiff  7 /Vice President, Controller and Chief AccountingOfficer$____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/,E|{Dr=PF0*8X> @ l    dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE (1) NO TITLE (2) NO TITLE (3)U } } $ }       QUESTAR GAS CO 10-Q 08/02/2018NO TITLEDate: August 2, 2018!/s/ Thomas F. Farrell, II   Thomas F. Farrell, II   Chief Executive Officer  $ ____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/$2,|+w=PF0*8X> @  l  W  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (2) NO TITLE (3)U } } $ } I"      QUESTAR GAS CO 10-Q 08/02/2018NO TITLEDate: August 2, 2018/s/ Mark F. McGettrick   Mark F. McGettrick  $ Executive Vice President and   Chief Financial Officer  $____________________________1)Created by Morningstar Document Research.0(http://documentresearch.morningstar.com/&@|.}qe==PF0*8X> @ l  O  dMbP?_*+%,&٭e2?'٭e2?(٭e2?)٭e2?",D/??!For the transition period from !QUESTAR GAS COMPANY MEETS THE CGLOSSARY OF TERMSIncome Statement Balance SheetBalance Sheet (1) Cash FlowsNote 3 Operating RevenueNote 3 Operating Revenue (1)Note 4 Income Taxes Note 5 Fair Value Measurements Note 5 Fair Value Measurem (1)!Recurring Fair Value Measuremen!Recurring Fair Value Measur (1)!Fair Value of Financial Instrum Volumes!Fair Value and Gains and Losses!Fair Value and Gains and Lo (1)!Note 7 Regulatory Assets and Li!Credit Facilities and Shortterm!Note 13 RelatedParty Transactio!The Corporate and Other SegmentResults of OperationsAnalysis of OperationsITEM 6 EXHIBITS SIGNATURE NO TITLE NO TITLE (1) NO TITLE (3)U } 1      QUESTAR GAS CO 10-Q 08/02/2018NO TITLE! /s/ Thomas F. 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