APSC FILED Time: 10/28/2011 1:50:45 PM: Recvd 10/28/2011 1:49:11 PM: Docket u-Doc. 25. October 28, 2011

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1 .~flljtfl-pointtm Energy.. CenterPoint Energy 1111 Louisiana Street Houston TX PO. Box 2628 Houston TX October Arkansas Public Service Commission Re: Gas Supply Rate (GSR) Filing for Residential GL-1 SCS-1 SCS-2 and LCS-1 Sales and Transport Customers Docket No U Gentlemen: Attached is the 2011 Winter Arkansas Gas Supply Rate filing applicable to Rate Schedule Nos RS-1 GL-1 SCS-1 SCS-2 and LCS-1. In accordance with the filing provisions in Rider GSR as approved by Order NO.6 in Docket No U the Company now files this Gas Supply Rate (GSR) in Docket No U which will be effective for November bills. This GSR is calculated in compliance with the provisions of the approved RiderGSR Attachments L1~~ Tracey V. Pham Manager of Rates xc: Attorney General Mr. Carl Simpson Riceland Foods Inc. Debra DePena Alan Henry Gary Jiles Kathy Lloyd Walter Bryant Keith Wall Dan Hagen Reading File

2 STATE OF ARKANSAS Page 1 SUMMARY OF GAS SUPPLY RATE DATE EFFECTIVE: November BILLING PERIOD: November March 2012 LI. NO. DESCRlPTION RE-11 CCF (1) (2) SALES SCS-11 CCF SCS-2 OIP I CCF SCS-3 NGV I CCF (3) (4) (5) LCS-1/MMBTU (6) COMMODITY $ $ $ $ $ VOLUMElRIC DEMAND $ $ $ LUFG $ $ $ $ $ SURCHARGE I (SURCREDIT) $ $ $ $ $ (0.0753) 5 TOTAL VOLUMETRlC GSR $ $ $ $ $ CD BASED DEMANDIMMBTU $ LI. NO. DESCRlPTION (7) TRANSPORT SCS-1 TSO IMMBTU SCS-2 TSO I MMBTU LCS-1 TSO IMMBTU (8) (9) (10) LCS-1 TSO MR1 PC1/MMBTU (11) 7 LUFG 8 TOTAL VOLUMElRIC GSR $ $ $ $ $ $ $

3 STATE OF ARKANSAS Page 2 WINTER GAS SUPPLY RATE DATE EFFECTIVE: November BILLING PERIOD: November March 2012 LL NO DESCRIPTION RS-l SCS-1 SCS-20IP SCS-3 NGV LCS-l (1) (2) (3) (4) (5) (6) PROJECTED WINTER COMMODITY GAS COST FIVE MQNTHS ENDINQ MARCH 31: PROJ. SALES VOLUME - CCF SALES ALLOe. BY CLASS % % % C011J1. COST BY CLASS $ $ $ $ PROJ. SALES VOLUME - CCF PROJ. SALES VOLUME - MMBTU TOTAL COM:MODITY CHG. ($IBILLING UNIT) $ $ $ $ $ TOTAL (7) % J PROJECTED DEMAND GAS COST TWEL VB MONTHS ENDING OCTOB;g&31' PIPELINE DEMAND ALLOCATION % % % PIPELINE DEMAND COST BY CLASS $ $ $ $ PIPELINE DEMAND PROVIDED BY OFFPEAKS & NOV $ (107634) PRO). SALES VOLUME - CCF ANNUALIZED CD's IN MMBTU TOTAL DEMAND CRG ($ibilling UNIT) $ $ $ 0.}441 $ $ PROJECTED WINTER LUFG COST EIVE MQNTItS ENDING MARCH 31: PERCENT OF LUFO ALLOCABLE TO SALES % % % LUFGCOST $ $ $7157 $ PROJ. SALES VOLUME - CCF PROJ. SALES VOLUME - MMBTU TOTAL LUFG CHG. ($IBILLING UNIT) $ gj.gj?q..._ $ $ $ % : 2/ % : i. 4/ ANNUAL mue-up TWEL VB MONTHS ENDED AUGUST ~ DEFERRAL BALANCE $ $ $ (12103) $ PMTS/(COLLECTIONS) FROM NEW TRANSPORTERS $ ~ (77753) $ $ DEFERRAL BALANCE TO COLLECT FROM SALES $ $ $ (12103) $ PROJ. SALES VOLUME - CCF PROJ. SALES VOLUME - MMBTU.l.Q!UU SURCHARGE/~SURCREDITl ~$IBILLING UNTIl $ $ $ $ ($0.0753) 11 Page 3 line Page 3 line Page 3 line 12. 5/ Page 5 colwnn 9. 3/ Page 13 column / (77753)

4 CALCULATION OF PROJECTED GAS SUPPLY COST BILLS RENDERED NOVEMBER THROUGH OCTOBER STATE OF ARKANSAS PAGE 3 LI. NO. DESCRIPTION RATE VOL-MCF VOL-MMBTU COST (1) (2) (3) (4) (5) 1 WINTER GAS SUPPLY PURCHASES: $ $ LESS WINTER LUFG COST $ $ WINTER GAS SUPPLY COMMODITY $ $ SUMMER GAS SUPPLY PURCHASES: $ $ LESS SUMMER LUFG COST $ $ SUMMER GAS SUPPLY COMMODITY $ $ ANNUAL COMMODITY COST $ $ PIPELINE DEMAND $ AMA GIC CHARGES $ AMA CUSTOMER CREDIT $ (812000) 11 SUPPLY DEMAND $ ANNUAL DEMAND COST $ WINTER GAS SUPPLY LUFG $ $ SUMMER GAS SUPPLY LUFG $ $ ANNUAL GAS SUPPLY LUFG $ $ GRAND TOTAL GAS SUPPLY COSTS $ WINTER FUEL RETENTION SUPPLIED BY TSO SUMMER FUEL RETENTION SUPPLIED BY TSO GRAND TOTAL FUEL RETENTION SUPPLIED BY TSO

5 D/B/A CENTERPOlNT ENERGY ARKANSAS GAS DEFERRAL BALANCE TWELVE MONTHS ENDED AUGUST Page S :$ LmNo P 9 Col2 1 (2)-(3)~(4) $ $ I ] LrnNo. ~'5 Co13 1 P9Co13 1 (')-"H4) PrimM"fu (~)"'~ ~;'clln' Z:::M"ili I (4) ~:m BruM" I I ] II $ I CoillIIlIl ]) Line No. W>-l Actual Gas Cost Actual GSR Recoveries Month-Year Pg5Coi4 P 9Col4 Over /Under 46 Balance Forward 47 Se tember October November December ] 3M Fb March A n1201j 55 Ma June 201 I 57 Jul 201 I 58 Au ust Total (89946) ~~~~~~:~~ (~ri:~)~onth (!)a~~:~~) ) ) Interest PriorMontb Amount Cum. Balance \23 "''' :<)~;:~;"o)1 1.60% ] % % % % % % ( % 3] % % % ] % (280) Is (12103)1

6 DIBIA CENTERPOINT ENERGY ARKANSAS GAS SUMMARY OF GSRREVENUE TWELVE MONTI{S ENDED AUGUST 31 20ll Page 5 Ll NO DESCRIPTION RS-l SCS-l SCS-2 LCS-1 GRAND TOTAL (1) (2) (3) (4) (5) (6) TOTAL BOOKED RECOVERIES SEPTEMBER $ $ $ $ $ OCTOBER $ $ $ $ $ ll NOVEMBER $ $ $ $ $ DECErvrnER $ $ $ $ $ JANUARY $ $ $ $ $ FEBRUARY $ $ $ (30964) $ $ MARCH $ $ $ 9367 $ $ APRJL $ $ $ 8076 $ $ MAY $ $ $ $ $ JUNE $ $ $ $ $ II JULY $ $ $ $ $ AUGUST $ $ $ $ $ TOTAL $ $ $ $ $ COMJvlODITY: 14 SEPTEMBER $ $ $ $ $ OCTOBER $ $ $ $ $ NOVEMBER $ $ $ $ $ DECEMBER $ $ $ $ ll2751 $ JANUARY $ $ $ $ $ FEBRUARY $ $ $ (27303) $ $ MARCH $ $ $ 7197 $ $ APRIL $ $ $ 7476 $ $ MAY $ $ 5ll2664 $ ll3ll $ $ JUNE $ $ $ $ $ JULY $ $ $ $ $ AUGUST $ $ $ $ $ TOTAL $ $ $ $ $ DEMAND: 27 SEPTEMBER $ $ $ $ $ OCTOBER $ $ $ $ $ NOVErvrnER $ $ $ $ $ DECEMBER $ $ $ 8381 $ $ JANUARY $ $ $ 5224 $ $ FEBRUARY $ $ $ (2855) $ $ MARCH $ $ $ 1922 $ $ APRJL $ $ $ 412 $ $ MAY $ $ $ 144 $ $ JUNE $ $ $ 2706 $ $ JULY $ $ $ $ $ AUGUST $ $ 5145ll $ $ $ TOTAL $ $ $ $ $ LUFG: 40 SEPTEMBER $ $ $ $ 3375 $ OCTOBER $ $ $ $ 2814 $ NOVEMBER $ $ $ 8457 $ 4408 $ DECEMBER $ $ $ 1ll3 $ 5583 $ JANUARY $ $ $ 720 $ 6712 $ FEBRUARY $ $ $ (806) $ 8125 $ MARCH $ $ $ 248 $ 6649 $ APRIL $ $ $ 188 $ 5217 $ MAY $ $ $ 263 $ 3261 $ JUNE $ $ $ 2513 $ 2740 $ JULY $ $ $ $ 2080 $ AUGUST $ $ $ $ 1523 $ 2313ll 52 TOTAL $ $ $ ll4473 $ $

7 TOTAL GSR COST SUMMARY TWELVE MONTHS ENDED AUGUST Page 6 LI NO DESCRIPTION (I) RS-1 SCS-I-2 (SSO) LCS-1 (SSO) (2) (3) (4) TOTAL SALES (5) 1 SEPTEMBER 2 OCTOBER 3 NOVEMBER 4 DECEMBER 5 JANUARY 6 FEBRUARY 7 MARCH 8 APRIL 9 MAY 10 JUNE 11 JULY 12 AUGUST 13 TOTAL $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $

8 COMMODITY COST ALLOCATION TWELVE MONTI-lS ENDED AUGUST Page 7 Ll NO DESCRIPTION (1) B1LLEDCCF: SEPTEMBER 2 OCTOBER 3 NOVEMBER 4 DECEMBER 5 JANUARY 6 FEBRUARY 7 MARCH 8 APRIL 9 MAY 10 JUNE 11 JULY 12 AUGUST 13 TOTAL RS-1 SCS-1 (SSO) LCS-1 (SSO) (2) (3) (4) TOTAL SALES (5) COMMODITY COST 14 SEPTEMBER 15 OCTOBER 16 NOVEMBER 17 DECEMBER 18 JANUARY 19 FEBRUARY 20 MARCH 21 APRIL 22 MAY 23 JUNE 24 JULY 25 AUGUST 26 TOTAL $ $ $ $ $ $ $ $ $ $ $ $ $ ALLOCATED COMMODITY COST 27 SEPTEMBER 28 OCTOBER 29 NOVEMBER 30 DECEMBER 31 JANUARY 32 FEBRUARY 33 MARCH 34 APRIL 35 MAY 36 JUNE 37 JULY 38 AUGUST 39 TOTAL $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $

9 DEMAND COST ALLOCATION TWELVE MONTHS ENDED AUGUST II Page 8 LI NO DESCRlPTION (I) RS-I SCS-I (2) (3) LCS-I TOTAL SALES (4) (5) ALLOCATION % % % % % DEMAND COST 2 SEPTEMBER 3 OCTOBER 4 NOVEMBER 5 DECEMBER 6 JANUARY 7 FEBRUARY 8 MARCH 9 APRlL 10 MAY II JUNE 12 JULY 13 AUGUST 14 TOTAL $ $ $ $ $ $ $ $ $ $ $ $ $ ALLOCATED DEMAND COST 15 SEPTEMBER 16 OCTOBER 17 NOVEMBER 18 DECEMBER 19 JANUARY 20 FEBRUARY 21 MARCH 22 APRIL 23 MAY 24 JUNE 25 JULY 26 AUGUST 27 TOTAL $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $

10 Page 9 D/BI A CENTERPOINT ENERGY ARKANSAS GAS LUFG COST ALLOCATION TWELVE MONTIIS ENDED AUGUST LI NO DESCRIPTION (I) RS-1 SCS-1 LCS-1 (2) (3) (4) TOTAL SALES (5) ALLOCATION % % % % % LUFGCOST 2 SEPTEMBER 3 OCTOBER 4 NOVEMBER 5 DECEMBER 6 JANUARY 7 FEBRUARY 8 MARCH 9 APRIL 10 MAY 11 JUNE 12 JULY 13 AUGUST 14 TOTAL $ $ $ $ $ $ ( ) $ ( ) $ ( ) $ ( ) $ (848751) $ $ $ ALLOCATED LUFGCOST 16 SEPTEMBER 17 OCTOBER 18 NOVEMBER 19 DECEMBER 20 JANUARY 21 FEBRUARY 22 MARCH 23 APRIL 24 MAY 25 JUNE 26 JULY 27 AUGUST 28 TOTAL $ $ $ 1021 $ $ $ 1761 $ $ $ $ $ $ $ $ $ 3841 $ ( ) $ ( ) $ (12664) $ ( ) $ (937313) $ (4534) $ ( ) $ ( ) $ (11649) $ (999425) $ (434286) $ (2101) $ (590790) $ (256719) $ (1242) $ $ $ 81 $ $ $ 319 $ $ $ 7381 $ $ $ $ $ $ ( ) $ ( ) $ ( ) $ ( ) $ (848751) $ $ $

11 ACTUAL GAS SUPPLY COST TWEL VB MONTHS ENDED AUGUST STATE OF ARKANSAS Page 10 LI. NO DESCRIPTION RATE VOL-MCF (1) (2) (3) GAS SUPPLY PURCHASES Financial Transactions $ Other Purchases $ GAS SUPPLY PURCHASES STORAGE Storage Injections $ ( ) Storage Withdrawals $ NET STORAGE (35180) Less Line Break Recoveries TOTAL PURCHASES $ Less Free Gas $ Less Lufg attributable to Sales $ GAS SUPPLY COMMODITY $ PIPELINE and SUPPLY DEMAND COST FTDemand Storage Capacity & Storage Deliverability AMA GIC Charges AMA Guaranteed Payments Other Pipeline Suppliers Sub-Total FT Demand NNTDemand Nomination Cost TOTAL PIPELINE & SUPPLY DEMAND GAS SUPPLY LUFG (G-3) GRAND TOTAL GAS SUPPLY COSTS COST (4) $ $ $ ($ ) $ $ $76896 $ $423 $ $ $ $ $ ($ ) $ $ $ $ $ $ $

12 DIB/A CENTERPOINT ENERGY ARKANSAS GAS BILLED SALES VOLUMES IN CCF TWELVE MONTHS ENDED AUGUST PAGE 11 Ll NO DESCRIPTION RS-l SCS (SSO) (1) (2) (3) 1 SEPTEMBER OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH APRIL l MAY JUNE II JULY AUGUST TOTAL LCS-l (SSO) TOTAL SALES SCS C[SO) (4) (5) (6) LCS-l (TSO) LCS-l (SPECIAL) TOTAL (7) (8) (10) l Q l0 Ll NO DESCRlPTION SCS-l (SSO) SCS-2 (SSO) (11) (12) (13) 14 SEPTEMBER OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY (43426) 20 MARCH APRIL 1l MAY JUNE JULY AUGUST TOTAL SCS (SSO) (14) SCS-l (TSO) SCS-2 (TSO) SCS (TSO) (15) (16) (17)

13 LUFG RECONCILIATION TWELVE MONTHS ENDED AUGUST Page 12 TOTAL LUFG& CO USED= Li. Volume Cust Count No. Dese. (excl mrl/qcl) Vol Alloc. (exdmrilqcl) CustAlloc Shrinkage (I) (2) (3) (4) (5) (6) Shmk alloc (7) Non-concdnt RL"' Fall-Out Aug-end Aug-end Peakdal; Alloe RLufg ComQ used Shrinkage (8) (9) (10) (11) (12) Allocated Allocated Allocated Allocated Lufg AIIoe Transp Sales Remainder Lufg Shrinka~e RLufS Com!! used Total Lufs: Percent In Kind Alloe Lufg Percent (13) (14) (15) (16) (i 7) (18) (19) (20) R~ % % % % % % SCS-l % % % % % % LCS-I % % % % % % Total % % % % % %

14 Page 13 ARKANSAS RETAINED LUFG IN KIND CALCULATION BY CLASS TWELVE MONTHS ENDED AUGUST LI. NO. DESC. (1) TOTAL (2) RES Lufg Projection Allocation SCS Lufg Projection Allocation LCS Lufg Projection Allocation Total Projected Lufg TME August 2012 Projected Lufg attributable to Sales Projected Lufg attributable to SCS TSO Projected Lufg attributable to LCS TSO Total Projected Lufg True-UE: for TME August RES Actual Lufg Allocation SCS Actual Lufg Allocation LCS Actual Lufg Allocation Actual Lufg TME August 2011 SCS-1 SALES SCS-1 TSO Total SCS 82% 18% LCS-1 SALES LCS-l TSO Total LCS 1% 99% Lufg attributable to Sales Lufg attributable to SCS TSO Lufg attributable to LCS TSO Total Lufg SCS TSO Retained Fuel LCS TSO Retained Fuel Actual TSO Retained Fuel TME August % 5% 11% Annual Wacog $ Imputed Revenue Requirement for SCS TSO Imputed Revenue Provided by SCS TSO Transportation Revenue (Over)/Under Restated As Volumetric Requirement for Trans Current Lufg attributable to SCS TSO Total Required Projected SCS Transportation Mcf SCS Lufg Fuel in Kind Retention Percentage Imputed Revenue Requirement for LCS TSO Imputed Revenue Provided by LCS TSO Transportation Revenue (Over)/Under Restated As Volumetric Requirement for Trans Current Lufg attributable to LCS TSO Total Required Projected LCS Transportation Mcf LCS Lufg Fuel in Kind Retention Percentage $ $ $ (190154) (42848) % $ $ $ (854532) (192553) (37656) %

15 CENTERPOINT ENERGY RESOURCES CORP ACTUAL GAS SUPPLY VOLUMES TWELVE MONlHS ENDED AUGUST STATE OF ARKANSAS workpaper 1 LI VOL MCF NO. DESCRIPTION SEPTEMBER OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH APRIL MAY IUNE JULY AUGUST TOTAL (\) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (l2) (13) (14) GAS SUPPLY PURCHASES Financial Transa~tioDS Other Purchases (48321) GAS SUPPLY PURCHASES (48321) STORAGE Storage Injections (48783) (594567) (783097) (740793) (623961) (I782034) (792813) (247981) ( ) ( ) ( ) (294364) ( ) Storage Withdrawals NET STORAGE (175702) ( ) (823509) ( ) ( ) (54855) (35180) TOTAL PURCHASES Less Free Gas Less Lufg P ) (556814) (I ) (257989) (152505) GAS SUPPLY COMMODITY (G-1) GASSUPPLYLUFG(G-3) ( ) (556814) ( ) (257989) (152505) GRAND TOTAL GAS SUPPLY VOLUME

16 DlBfA CENTERPOINT ENERGY ARKANSAS GAS ACTUAL GAS SUPPLY COST TWELVE MONTHS ENDED AUGUST STATE OF ARKANSAS workpaper2 LI COST NO. DESCRIPTION SEPTEMBER OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH APRlL MAY JUNE JULY AUGUST TOTAL (1) (2) (3) (4) (5) (6) (n (8) (9) (10) (II) (12) (13) (14) GAS SUPPLY PURCHASES Financial Transactions $ $ $ $ $ $ $ $ $ $ Other Purchases $ ~ ~.rn:l1l..ill. ~ :ru..j.ti.til.lli...l..2.ll lli.q.w. ~ ~ ~ $ ~ GAS SUPPLY PURCHASES $ $ $ $ $ $ $ $ $ $ $ STORAGE Storage Injections ($386704) ($ ) ($ ) ($ ) ($ ) ($ ) ($ ) ($ ) ($ ) ($ ) ($ ) ($ ) ($ ) Storage Withdrawals $ $ ~ M.lli.ill. ~ illl1ill ~ lliqwq ll.112.2n ~ ~ ~ NET STORAGE $ ($ ) $ $ $ ($ ) $ $ ($ ) ($ ) ( ) ($356029) $ TOTAL PURCHASES $ $ $ $ $ $ $ $ $ $ $ LESS LINE BREAK RECOVERIES $7200 $7822 $6382 $5195 $8498 $6921 $6802 $2215 $6303 $3084 $9512 $6963 $76896 """"" GAS SUPPLY COMMODITY (G-l) $ $ $ $ $ $ $ $ $ $ $ $ DEMAND COST (G-2) 10 FT Demand $ $ $ $ $ $ $ $ SI $ $ $ Storage Capacity & Storage Deliverabiltiy $ $ $ $ $ $ $ $ $ $ $ $ AMA OlC Charges $ $ $ $ $ $ $55047 $878 $40841 $81311 $ $ $ AMA Guaranteed Payments ($13243) (519570) ($190000) ($190000) ($190OOO) ($190000) ($190000) (550000) ($57639) ($13819) (SI3325) ($21551) ($ ) \4 Other Pipeline Supp~ers ~ ~ == "-ill12 :oo.ill = Iill.ill I111.lli =.0 ~ """"" """" = 15 Sub-Total FT Demand $ $ $ $ $ $ $ $ $ $ $ $ $ No-NoticeDemand $ $ $ $ $ $ $ $ $ $ $ $ Nomination Cost mill mill $ $ $ $ TOTAL DEMAND $ $ $ $ $ $ S $ $ $ $ $ $ GAS SUPPLY LUFG (G-3) "'"'" """"" '" '" '" '" '" '" '" '" '" '" '" '" '" '" '" '" '" '" 20 GRAND TOTAL GAS SUPPLY COSTS $ $ $ $ $ $ $ $ $ $ $ $

17 CENTERPOINT ENERGY RESOURCES CORP COMMODlTY COST TWELVE MONniS ENDED AUGUST workpaper3 LI NO DESCRIPTION SEPTEMBER OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH APRJL MAY JUNE JULy AUGUST TOTAL (I) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) RS-I SCS-l (SSO) l LCS-l (SSO) lli.2Qa = = = """'- ~ TOTAL SALES U1.LlQ.Q ~ ~.!2..lli.Z RS-l $ $ $ $ $ $ $ $ $ $ $ $ $ SCS-I (SSO) $ $ $ $ $ $) $ $ $ $ $ $ :tl.lli.l±! TOTAL MONTHLY ALLOCATED COST $ $ $ $ ~ ~ mm.ill. 11..illlli!2.2.i2.2iIi $ $ $ $ LCS-) (SSO) ~ s.jm.ill SM!.Q12 ~ ~ = $ $ $.LJ2..Q 1 mill "-'-'" "'"" MQl'ITH1 YP1JRClMSES Willi free QAS AND 1 l!iqpriced AT ArllilJAI AVERAQE PRICE Qf $5 56~4' Purchases $ $ $ $ $ $ $ $ $ Free Gas $ $0 $0 $0 $0 $0 '0 $0 $0 $0 $0 $ Lufg $ ~ ~ ~ ~ f1s.ill..3..ill ($ ) ~ 1llil.W2l ""'-llil = Iill. Oi ruillll\ 13 Commodity Cost $ $ $ $ $ $ $ $ $ $ $ $ $

18 DIBIA CENTERPOINT ENERGY ARKANSAS GAS ARKANSAS SHRINKAGE VOLUNIE BY CLASS TWELVE MONTHS ENDED AUGUST workpaper4 LL NO. DESC. SEPTEMBER OCTOBER NOVEMBER (1) (2) (3) (4) RS-1 (3705) SCS-I (11955) (6135) LCS-1 (282) p25~ (11) 4 TOTAL (15942) (5626) CO:MPANY USED DECErvlBER JANUARY FEBRUARY MARCH (5) (6) (7) (8) APRIL MAY JUNE JULy AUGUST TOTAL (9) (10) (11) (12) (13) (14) (3212) (5214) (5317) (1390) (6817) (9106) (9920) (37) (26) (SO) (6S) (10055) (14370) (15302)

19 ARKANSAS ACTUAL RETAINED LUFG IN KIND VOLUME BY CLASS TWELVE MONTHS ENDED AUGUST workpaper 5 L1. NO. DESC. SEPTE1ffiER OCTOBER (1) (2) (3) SCS-I & SCS-2 (6144) (7380) 2 LCS-1 ~ p TOTAL (20375) (22076) NOVEMBER DECEMBER JANUARY FEBRUARY MARCH APRIL (4) (5) (6) (7) (8) (9) (9570) (12247) (12785) (10538) (10247) (7.988) ~ ( ( ~ ~ ( (33601) (39293) (42710) (36293) (36230) (31020) MAY JUNE JULY AUGUST TOTAL (10) (11) (12) (13) (14) (7881) (7232) (6239) (7569) (105820) ~ ( ( P02881} POO5452 (32866) (36912) (36539) (38450) (406365)

20 CENTERPOrnT ENERGY RESOURCES CORP. ARKANSAS LUFG CALCULATION TWEL VB MONTHS ENDED AUGUST workpaper 6 LL NO. DESC. SEPTE11J3ER OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY MARCH APRIL MAY JUNE JULy AUGUST TOTAL (I) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) 1 Purchases Sales in Mcf ) Purch ~ Sales ( ) (556814) ( ) (257989) (152505) Line Break & Free Lufg ( ) (556814) ( ) (257989) (152505) Add back SCS Retention Add back LCS Retention TrueLufg ( ) (520584) ( ) (225123) (115593)

21 DfBIA CENTERPOINT ENERGY ARKANSAS GAS VOLUME PROJECTION TWELVE MONTHS ENDED AUGUST workpaper 7 LI NO DESCRIPTION (1) RS-1 SCS (SSO) (2) (3) LCS-1 (SSO) TOTAL SALES (4) (5) 1 PROFORMA 2007 RATE CASE BILLING DETERMINANTS: ANNUALCCF ADJUSTMENTS ( ) REMAINING SALES WINTER SUMMER ( ) ( ) TRANSPORTATION CCF ADJUSTMENTS PROJECTED TRANSPORT CCF TSO as Percent of Class 18.74% 99.30%

22 workpaper 8 Used for 2011 Actuals Development of Peak Day Allocation Factors excluding MR-l and PC-1 customers (I) (2) Class Sales Transport Total Sales % Total % Res % % SCS % % LCS % % Total % % (2) Total- used to allocate demand portion oflufg component in GSR - includes transportation Used for 2012 Projections Development of Peak Day Allocation Factors excluding MR-l and PC-l customers (1) (2) Class Sales Transport Total Sales % Total % Res % % SCS % % LCS % % Total % % (2) Total- used to allocate demand portion of LUFG component in GSR - includes transportation