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llnos Commerce Commsson Chef Clerks Offce Tarff Transmttal ssued By: Commonwealth Edson Company ERM #17-080 Flng Date: 05/18/2017 Effectve Date: 05/19/2017 Flng for nformatonal purposes, (1) the Purchased Electrcty Charges as provded for Rate BES and Rder PE (2) the PJM Servces Charges as provded for n Rder PE and Rate BES (3) the Capacty Charge as provded n Rate BESH & Rder PPO (4) the PJM Servces Charge as provded n Rate BESH and Rder PPO (5) Mscellaneous Procurement Components Charge (MPCC) as provded for n Rate BESH and Rder PPO and (6) the Transmsson Servces Adjustment (TSA) Factor and Mscellaneous Procurement Components Adjustment (MPCA) Factor as provded for Rder MSS. LL. C.C. No. Part Secton Sheet No. 10 37th nformatonal Sheet No. 1 10 29th nformatonal Sheet No. 2 10 33rd Rev. nformatonal Sheet No. 4 10 27th Rev. nformatonal Sheet No. 5 10 30th Rev. nformatonal Sheet No. 6 10 25th Rev. nformatonal Sheet No. 20 10 13th Rev. nformatonal Sheet No. 35 FLED N COMPLANCE WTH Order No. Law Tarff Provson Wthdrawn PUBLC UTLTES BUREAU Revewed By: [312452][84131] Page 1 of 1 Date:

An rxelon Company VA HAND DELVERY May 18, 2017 Ms. Elzabeth Rolando Chef Clerk llnos Commerce Commsson 527 East Captol Avenue Sprngfeld, L 62701 Subject: nformatonal Flng of Charges and Factors Determned by Formulae Dear Ms. Rolando: Commonwealth Edson Company (Company) submts the followng nformatonal sheets for flng wth the llnos Commerce Commsson (CC) on May 18, 2017, for nformatonal purposes: COMMONWEAL TH EDSON COMPANY ELECTRCTY LL. C. C. No. 10 Purchased Electrcty Charges 37th Revsed nformatonal Sheet No. 1 cancelng 36th Revsed nformatonal Sheet No. 1 PJM Servces Charges 29th Revsed nformatonal Sheet No. 2 cancelng 28th Revsed nformatonal Sheet No. 2 Capacty Charge 33rd Revsed nformatonal Sheet No. 4 cancelng 32nd Revsed nformatonal Sheet No. 4 PJM Servces Charge 27th Revsed nformatonal Sheet No. 5 cancelng 26th Revsed nformatonal Sheet No. 5 Mscellaneous Procurement Components Charge 30th Revsed nformatonal Sheet No. 6 cancelng 29th Revsed nformatonal Sheet No. 6 ncremental Uncollectble Cost Factors 25th Revsed nformatonal Sheet No. 20 cancelng 24th Revsed nformatonal Sheet No. 20 Transmsson Servces Adjustment Factor and Mscellaneous Procurement Components Adjustment Factor 13th Revsed nformatonal Sheet No. 35 cancelng 12th Revsed nformatonal Sheet No. 35

Ms. Elzabeth Rolando -2- May 18, 2017 lnformatonal Flng of Charges and Factors Determned by Formulae These nformatonal sheets are to become effectve May 19, 2017. The charges and factors provded n the aforementoned nformatonal sheets are determned as follows: (a) the Purchased Electrcty Charges (PECs) lsted n nformatonal Sheet No. 1 are determned n accordance wth Rder PE - Purchased Electrcty (Rder PE), Rate BES - Basc Electrc Servce (Rate BES), and the results of the PJM Fnancal Transmsson Rghts (FTR) Auctons; (b) the PJM Servces Charges lsted n nformatonal Sheet No. 2 are determned n accordance wth Rder PE and Rate BES; (c) the Capacty Charge lsted n nformatonal Sheet No. 4 s determned n accordance wth Rate BESH - Basc Electrc Servce Hourly Prcng (Rate BESH) and Rder PPO - Power Purchase Opton (Rder PPO); (d) the PJM Servces Charge lsted n nformatonal Sheet No. 5 s determned n accordance wth Rate BESH and Rder PPO; (e) the Mscellaneous Procurement Components Charge (MPCC) lsted n nformatonal Sheet No. 6 s determned n accordance wth Rate BESH and Rder PPO; (f) the ncremental Supply Uncollectble Cost Factors (SUFs) and ncremental Dstrbuton Uncollectble Cost Factors (DUFs) lsted n nformatonal Sheet No. 20 are determned n accordance wth Rder UF - Uncollectble Factors (Rder UF); and (g) the Transmsson Servces Adjustment (TSA) Factor and Mscellaneous Procurement Components Adjustment (MPCA) Factor lsted n nformatonal Sheet No. 35 are determned n accordance wth Rder MSS - Market Settlement Servce (Rder MSS). Copes of ths transmttal letter and assocated nformatonal sheets (marked DUPLCATE) are enclosed for delvery to Mr. Steve Knepler (Supervsor: Accountng Department - Fnancal Analyss Dvson), Ms. Joy Ncdao-Cuyugan (Drector: Fnancal Analyss Dvson), Ms. Bonne Pearce (Accountant: Accountng Department - Fnancal Analyss Dvson), Dr. Erc Schlaf (Economst: Polcy Dvson), and Mr. Scott Struck (Manager: Rates - Fnancal Analyss Dvson), all of the Bureau of Publc Utltes of the CC Staff. Copes of ths transmttal letter and assocated nformatonal sheets (marked DUPLCATE) are beng sent separately to Mr. Torsten Clausen (Drector: Polcy Dvson), also of the CC Staff. Work papers documentng the determnaton of the PECs and the four Purchased Electrcty Prces, PJM Servces Charges, Capacty Charge, MPCC, TSA Factor, and MPCA Factor are beng sent electroncally to Mr. Clausen at tclausen@cc.llnos.gov.

Ms. Elzabeth Rolando -3- May18,2017 lnformatonal Flng of Charges and Factors Determned by Formulae Work papers documentng the determnaton of the ncremental Uncollectable Cost Factors, JSUFs and JDUFs, are beng sent electroncally to AccountnqMgr@cc.llnos.gov, Mr. Knepler at sknepler@cc.llnos.gov, Ms. Pearce at bpearce@cc.llnos.gov, Mr. Struck at sstruck@cc.llnos.gov, and Mr. Clausen at tclausen@cc.llnos.gov. n addton, the nformatonal sheets are beng sent electroncally to Mr. Sam McCJerren (Tarff Analyst: Rates - Fnancal Analyss Dvson) of the Bureau of Publc Utltes of the CC Staff at smcclerr@cc.llnos.gov. Two extra copes of ths transmttal Jetter and the assocated nformatonal sheets are provded. One set of such copes s provded for your convenence n acknowledgng recept of ths Jetter and nformatonal sheets, and may be returned to the Company n the self-addressed stamped envelope provded. Sncerely, \ {J;1f1Af21 TT,ur Martn &.Fruehe Manager Retal Rates (630) 437-2063 MGF:cms Enclosures cc: T. Clausen S. Knepler J. Ncdao-Cuyugan 8. Pearce E. Schlaf S. Struck

Edson Company LL. C. C. No. 10 ELECTRCTY 37th Revsed nformatonal Sheet No. 1 (Cancelng 3Gth Revsed nformatonal Sheet No. 1) PURCHASED ELECTRCTY CHARGES Supplement to Rate BES and Rder PE (1) Unts Resdental /kwh Watt-hour Non-Electrc Space HeatnQ /kwh Demand Non-Electrc Space Heatnq /kwh Nonresdental Electrc Soace Heatna /kwh Dusk to Dawn Lghtna /kwh Purchased Electrcty Cl1arges (PECs) Applcable for the January 2017 Monthly Bllng Perod and Extendng Through the May 2017 Monthly BllnQ Perod (2) (3) (4) (5) Summer PEC (6) Nonsummer PEC 4.846 5.055 4.960 5.124 4.933 5. 116 4.496 4.958 1.877 2.241 1G eneral L ght1ng < /kwh 4453 4.885 PE Cs Applcable Begnnng wth the Customer Group or Subgroup Unts June 2017 Monthly Bllng Perod and Extendng Through the May 2018 Monthly Bllna Perod (2) (3) (4l (7) Summer PEC (6) Nonsummer PEC Resdental /kwh 5.555 5.814 Watt-hour Non-Electrc Space Heatno /kwh 5.704 5.930 Demand Non-Electrc Soace Heatna /kwh 5.674 5.922 Nonresdental Electrc Space Heatnq /kwh 5.199 5.734 Dusk to Dawn lahtna /kwh 2,199 2.626 General L g htn g /kwh 5.219 5.725 l NOTES1 (1) Ths nformatonal sheet s supplemental to Rate BES - Basc Electrc Servce (Rate BES) and Rder PE - Purchased Electrcty (Rder PE). (2) PECs are desgnated on retal customer blls as the Electrcty Supply Charge pursuant to Rate BES. (3) PECs nclude Supply Base Uncollectble Cost Factors (Supply BUFs) as lsted n nformatonal Sheet No. 21. (4) PECs ncorporate ncremental Supply Uncollectble Cost Factors (SUFs) as lsted n nformatonal Sheet No. 20, whch nclude a Supply Balancng Factor (SBF) n accordance wth the provsons of Rder UF - Uncollectble Factors (Rder UF). (5) PECs ncorporate the results of the Fall 2016 Procurement Event approved by the llnos Commerce Commsson (CC) on September 16, 2016. (6) The Summer PECs are applcable n the months of June, July, August and September. (7) PECs ncorporate the results of the Sprng 2017 Procurement Event approved by the CC on Aprl 7, 2017 and the fnal results from the PJM Fnancal Transmsson Rghts (FTR) Auctons completed May 1, 2017. Fled wth the llnos Commerce Commsson on Date Effectve: May 19, 2017 ssued by A. R. Pramaggore, Presdent and CEO Post Offce Box 805379 Chcago, llnos 60680-5379

Edson Company LL. C. C. No. 10 ELECTRCTY 29th Revsed nformatonal Sheet No. 2 (Cancelng 28th Revsed nformatonal Sheet No. 2) PJM SERVCES CHARGES Supplement to Rate BES and Rder PE (1) PJM Servce Charges (PSCs) Customer Group or Subgroup Unts Applcable wth the January 2017 Monthly Bllng Perod and Extendng Through the Mav 2017 Bllna Perod 12) 13\ (4) Resdental /kwh 1.263 Watt-hour Non-Electrc Space Heatnq /kwh 1.244 Demand Non-Electrc Space Heatnq /kwh 1.244 Nonresdental Electrc Space Heatnq /kwh 1.244 Dusk to Dawn Uohtno #kwh 1.221 General Uahtna /kwh 1 221 PS Cs Customer Group or Subgroup Unts Applcable Begnnng wth the June 2017 Monthly Bllng Perod and Extendng Through the May 2018 Monthly Bllna Perod (2) (3) (4\ Resdental /kwh 1.337 Watt-hour Non-Electrc Space Heatng /kwh 1.327 Demand Non-Electrc Space Heatno /kwh 1.327 Nonresdental Electrc Soace Heatna /kwh 1.327 Dusk to Dawn Lghtng /kwh 1.319 General Lghtng /kwh 1.319 NOTES (1) Ths nformatonal sheet s supplemental to Rate BES - Basc Electrc Servce (Rate BES) and Rder PE - Purchased Electrcty (Rder PE). (2) PSCs are desgnated on retal customer blls as the Transmsson Servces Charge pursuant to Rate BES. (3) PSCs nclude Supply Base Uncollectble Cost Factors (Supply BUFs) lsted n nformatonal Sheet No. 21. (4) PSCs ncorporate ncremental Supply Uncollectble Cost Factors (SUFs) lsted n nformatonal Sheet No. 20. Fled wth the llnos Commerce Commsson on Date Effectve: May 19, 2017 ssued by A. R. Pramaggore, Presdent and CEO Post Offce Box 805379 Chcago, llnos 60680-5379

Edson Company LL. C. C. No. 10 ELECTRCTY 33rd Revsed nformatonal Sheet No. 4 (Cancelng 32nd Revsed nformatonal Sheet No. 4) CAPACTY CHARGE Supplement to Rate BESH and Rder PPO (1) Monthly Capacty Charge (MCC) Applcable Begnnng wth the January 2017 Monthly Bllng Perod and Extendng Through the May 2017 Monthly Bllng Perod (2) (3) MCC Applcable Begnnng wth the June 2017 Monthly Bllng Perod and Extendng Through the May 2018 Monthly Bllng Perod (2) (3) 3.10925 $/kw-month 4.69477 $/kw-month NOTES: (1) Ths nformatonal sheet s supplemental to Rate BESH - Basc Electrc Servce Hourly Prcng (Rate BESH) and Rder PPO - Power Purchase Opton (Rder PPO). (2) The MCC ncludes the System Average Supply Base Uncollectble Cost Factor (SBUFsys) lsted n nformatonal Sheet No. 21 (3) The MCC ncludes the System Average ncremental Supply Uncollectble Cost Factor (SUFsys) lsted n nformatonal Sheet No. 20. Fled wth the llnos Commerce Commsson on Date Effectve: May 19, 2017 ssued by A. R. Pramaggore, Presdent and CEO Post Offce Box 805379 Chcago, llnos 60680-5379

Edson Company LL. C. C. No. 10 ELECTRCTY 27th Revsed nformatonal Sheet No. 5 (Cancelng 26th Revsed nformatonal Sheet No. 5) PJM SERVCES CHARGE Supplement to Rate BESH and Rder PPO (1) PJM Servces Charge (PSC) Applcable Begnnng wth the January 2017 Monthly Bllng Perod and Extendng Through the May 2017 Monthly Bllng Perod (2) (3) (4) PSC Applcable Begnnng wth the June 2017 Monthly Bllng Perod \ and Extendng Through the May 2018 Monthly Bllng Perod (2) (3) (4) 0.838 /kwh 0.844 /kwh NOTES; (1) Ths nformatonal sheet s supplemental to Rate BESH - Basc Electrc Servce Hourly Prcng (Rate BESH) and Rder PPO - Power Purchase Opton (Rder PPO). (2) The PSC s desgnated on retal customer blls as the Transmsson Servces Charge pursuant to Rate BESH and Rder PPO. (3) The PSC ncludes the System Average Supply Base Uncollectble Cost Factor (SBUFsys) lsted n nformatonal Sheet No. 21. (4) The PSC ncludes the System Average ncremental Supply Uncollectble Cost Factor (SUFsys) lsted n nformatonal Sheet No. 20. Fled wth the llnos Commerce Commsson on Date Effectve: May 19, 2017 ssued by A. R. Pramaggore, Presdent and CEO Post Offce Box 805379 Chcago, llnos 60680-5379

Edson Company LL. C. C. No. 10 ELECTRCTY 30th Revsed nformatonal Sheet No. 6 (Cancelng 29th Revsed nformatonal Sheet No. G) MSCELLANEOUS PROCUREMENT COMPONENTS CHARGE Supplement to Rate BESH and Rder PPO (1) Mscellaneous Procurement Components Charge (MPCC) Applcable Begnnng wth the January 2017 Monthly Bllng Perod and Extendng Through the May 2017 Monthly Bllng Perod (2) (3) MPCC Applcable Begnnng wth the j June 2017 Monthly Bllng Perod and Extendng Through the 1 May 2018 Monthly Bllng Perod (2) (3) 0.198 /kwh 0.110 /kwh NOTES: (1) Ths nformatonal sheet s supplemental to Rate BESH - Basc Electrc Servce Hourly Prcng (Rate BESH) and Rder PPO - Power Purchase Opton (Rder PPO). (2) The MPCC ncludes the System Average Supply Base Uncollectble Cost Factor (SBUFsys) lsted n lnfom1atonal Sheet No, 21. (3) The MPCC ncludes the System Average ncremental Supply Uncollectble Cost Factor (SUFsys) lsted n nformatonal Sheet No. 20. Fled wth the llnos Commerce Commsson on Date Effectve: May 19, 2017 ssued by A. R. Pramaggore, Presdent and CEO Post Offce Box 805379 Chcago, llnos 60680-5379

Edson Company LL. C. C. No. 10 ELECTRCTY 25th Revsed nformatonal Sheet No. 20 (Cancelng 24th Revsed nformatonal Sheet No. 20) NCREMENTAL UNCOLLECTBLE COST FACTORS Supplement to Rder UF (1) ncremental Dstrbuton Uncollectble Cost Factors (DUFs) (2) DUFR j DUF,; DUFA SUFR (3) SUF,, (3) 1SUFµ(3) SUFsys (4) DUFs DUFs Applcable Begnnng wth the Applcable Begnnng wth the January 2017 June 2017 Monthly Bllng Perod Monthly Bllng Perod And Extendng Through the And Extendng Through the May 2017 May 2018 Monthly Bllnq Perod (5) Monthly Bllnq Perod (5) 1.0118 1 0152 1.0029 1 0033 1.0003 1 0002 ncremental Supply Uncollect1ble Cost Factors (SUFs) SUFs SUFs Applcable Begnnng wth the Applcable Begnnng wth the September 2016 June 2017 Monthly Bllng Perod Monthly Bllng Perod and Extendng Through the and Extendng Through the May 2017 May 2018 Monthly Blln11 Perod (6) Monthly BllnQ Perod (6) 0.9952! 0.9912 0.9935! 0.9962 0.9743 0.9897 0.9937 0.9926 NOTES! (1) Ths nformatonal sheet s supplemental to Rder UF - Uncollectble Factors (Rder UF). (2) DUFs are appled as shown n the Delvery Servce Charges nformatonal Sheets (nformatonal Sheet No. 24 through nformatonal Sheet No. 31) and n accordance wth the provsons of the Zero Standard Credt subsecton of the Monthly Credt and Charge secton of Rder ZSS - Zero Standard Servce (Rder ZSS). (3) SUFs are appled n accordance wth the provsons of the Monthly Charges secton of Rate BES - Basc Electrc Servce (Rate BES). (4) SUFsvs s appled n accordance wth the provsons of the Monthly Charges secton of Rate BESH - Basc Electrc Servce Hourly Prcng (Rate BESH). (5) DUFs ncorporate a Dstrbuton Balancng Factor (DBF) n accordance wth the provsons n Rder UF, (6) SUFs ncorporate a Supply Balancng Factor (SBF) n accordance wth the provsons n Rder UF. Fled wth the llnos Commerce Commsson on Date Effectve: May 19, 2017 ssued by A. R. Pramaggore, Presdent and CEO Post Offce Box 805379 Chcago, llnos 60680-5379

Edson Company LL. C. C. No. 10 ELECTRCTY 13th Revsed nformatonal Sheet No. 35 (Cancelng 12th Revsed nformatonal Sheet No. 35) TRANSMSSON SERVCES ADJUSTMENT FACTOR AND MSCELLANEOUS PROCUREMENT COMPONENTS ADJUSTMENT FACTOR Supplement to Rder MSS (1) Bllng Adustment Annlcabltv Perod Begnnng wth the January 2015 Monthly Bllng Perod and Extendng Throuph the Mav 2015 Monthly BllnQ Perod Begnnng wth the October 2015 Monthly Bllng Perod and Extendn Throuah the December 2015 Month! Blln Perod, Begnnng wth the January 2016 Monthly Bllng Perod and Extendn Throu h the Ma 2016 Month! Blln Perod Begnnng wth the June 2016 Monthly Bllng Perod and. Extendn Throu h the September 2016 Month! Blln Perod Begnnng wth the October 2016 Monthly Bllng Perod and Extendn Throu h the December 2016 Month! Blln Perod, Begnnng wth the January 2017 Monthly Bllng Perod and Extendn Throu h the Ma 2017 Month! Bllng Perod Begnnng wth the June 2017 Monthly Bllng Perod and Extendng Through the May 2018 Monthly Bllng Perod Transmsson Servces Adjustment (TSA) Factor $2466/kW $3.122/kW $3.101/kW $3.119/kW $3.123/kW $3.468/kW $3468/kW $3.452/kW $3.463/kW " " Procurement Components Adjustment (MPCA) Factor 0.307 /kwh 0.297 /kwh 0.295 /kwh 0.308 /kwh 0.292 /kwh 0.217 /kwh 0.220 /kwh 0.219 /kwh 0.137 /kwh NOTE: ( 1) Ths nformatonal sheet s supplemental to the provsons n Rder MSS Market Settlement Servce (Rder MSS). Fled wth the llnos Commerce Commsson on Date Effectve: May 19, 2017 ssued by A. R. Pramaggore, Presdent and CEO Post Offce Box 805379 Chcago, llnos 60680-5379