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1 John C. Frain Director Regulatory Strategy & Revenue Policy P.O. Box 1475 Baltimore, Maryland Telephone Fax December 18, 2018 Via Electronic Filing Terry J. Romine, Executive Secretary Public Service Commission of Maryland William Donald Schaefer Tower 6 Saint Paul Street, 16 th Floor Baltimore, Maryland Re: Case Nos. 9056/9064; Compliance Filing in Case No Supplement No. 624 to P.S.C. Md. E-6 Revisions to Time-of-Use Standard Offer Service Energy s and February 2019 Administrative Charges under Rider 1 Standard Offer Service ( SOS ) Dear Ms. Romine: Baltimore Gas and Electric Company (BGE) files herewith Supplement 624 to P.S.C. Md. E-6, BGE s Retail Electric Service Tariff to become effective February 1, Based on results from the October 22, 2018 retail supply procurement bids, the Residential, Type I and Electric Vehicle TOU SOS Energy rates have been shaped by rating period using June September 2018 settlement data. The Residential and Type I standard and unshaped TOU rates were previously accepted by the Maryland Public Service Commission in Order No issued October 26, 2018 in the above-referenced cases. Under Rider 1, the SOS Administrative Charges are subject to adjustment in the February, June and October billing months to reflect the estimated incremental, uncollectible, and cash working capital costs of providing Residential, Type I, Type II and Hourly Service. The Company has performed its true-ups of actual incremental, uncollectible, and cash working capital costs to the estimated costs of providing Residential, Type I, Type II and Hourly Service. As such, any over- or under-collection of costs compared to the estimated costs for the program year are included in the projected Rider 1 rates herein to be effective for the period from February 2019 through May Under Rider 1, the SOS Administrative Charges are also subject to an annual adjustment to the return component. Effective for the period from February 2019 through January 2020, the Company has adjusted the return component by service type consistent with Commission Order No See Attachment 1 for supporting calculations.

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3 Attachment 1 Annual Adjustment to the SOS Return Component

4 Baltimore Gas and Electric Company Annual Adjustment to the Return Component of the SOS Administrative Charge ($000 Except per KWH) Residential Type I Type II Hourly 1 Cash Working Capital (Nov-17 to Oct-18) $ 77,373 $ 4,690 $ 8,979 $ Short Term Debt (CN 9406), grossed up for franchise tax and PSC assessment 0.45% 0.45% 0.45% 0.45% 3 = 1 x 2 Revenue Requirement at Short Term Debt $ 348 $ 21 $ 40 $ 3 4 Pre-tax of Return (CN 9406), adjusted for Tax Cuts and Jobs Act of % 9.51% 9.51% 9.51% 5 = 1 x 4 Revenue Requirement at Pre-Tax of Return $ 7,358 $ 446 $ 854 $ 59 6 = 5-3 Incremental Revenue Requirement $ 7,010 $ 425 $ 814 $ 56 7 MWH Sales ( Nov-17 to Oct-18) 9,706, ,613 1,744, ,502 8 = 6 / 7 per KWH $ $ $ $

5 Attachment 2 Rider 1 - Standard Offer Service and Schedule PL (Private Area Lighting) s Clean and Redlines Tariff Pages

6 Baltimore Gas and Electric Company Electric -- Retail 57 PRIVATE AREA LIGHTING ELECTRIC SCHEDULE P L AVAILABILITY: MONTHLY RATES: For unmetered outdoor area lighting of private property. 1. For supply of controlled electricity installation and maintenance of overhead supplied lamp fixtures and lamp renewals as required for each Mercury Vapor (limited to existing installations) w MV Pendant $ w MV Pendant $ w MV Pend/Flood $ , w MV Pendant $30.84 $30.83 Sodium Vapor w SV Flood (limited to existing installations) $ w SV Pendant $ w SV Pendant $ w SV Pendant $ w SV Pend/Flood $18.30 $ , w SV Pendant $48.25 $48.24 Metal Halide (limited to existing installations) w MH Pulse Teardrop $26.27 $ w MH Pulse Pendant $18.06 $ w MH Pendant $ w MH Spot or Flood $ w MH Pendant $ w MH Pulse Flood/Spot $ w MH Pulse Pendant Gray $ , w MH Pend/Flood $45.47 $ Where longer than 4-foot upsweep arms are required for such lighting supply, add $3.68 For each span of overhead wires required on existing and additional poles $1.60 For the installation and maintenance of overhead-supplied lamp poles each additional standard distribution wood pole $3.67 For supply of controlled electricity installation and maintenance of underground-supplied lamp fixtures and lamp renewals as required for each Mercury Vapor (limited to existing installations) w MV Modern/Colonial $ w MV Pend/Flood $14.22 Sodium Vapor w SV Colonial Modern (limited to existing installations) $ w SV Flood (limited to existing installations) $ w SV Gothic $14.45 Continued on Next Page P.S.C. Md. -- E-6 (Suppl ) Filed 12/18/1808/31/18 - Effective 02/01/1910/01/18

7 58 Baltimore Gas and Electric Company Electric -- Retail Schedule PL Continued w SV Acorn $ w SV Acorn Havre de Grace $ w SV Colonial Premiere $ w SV Acorn Maple Lawn $ w SV Pendant $ w SV Modern/Colonial $ w SV Pendant $ w SV Rectilinear $ w SV Acorn $ w SV Gothic $ w SV Acorn Victorian (limited to existing installations) $ w SV Colonial Premiere $ w SV Acorn Havre de Grace $ w SV Acorn Maple Lawn $ w SV Tear Drop $ w SV Pendant $ w SV Tear Drop $ w SV Pend/Flood $15.90 $ w SV Rectilinear $27.81 $ , w SV Pendant $43.35 $43.34 Metal Halide (limited to existing installations) w MH Colonial $ w MH Acorn Maple Lawn $ w MH Acorn Havre de Grace $ w MH Acorn $ w MH Gothic $ w MH Towson green $ w MH Pulse Acorn Maple Lawn $27.19 $ w MH Pulse Modern $18.90 $ w MH Pulse Pendant $16.96 $ w MH Pulse Acorn $22.75 $ w MH Pulse Acorn Havre de Grace $24.17 $ w MH Pulse Colonial $17.59 $ w MH Pulse Gothic $22.75 $ w MH Pulse Colonial Premiere $19.32 $ w MH Pulse Rectilinear $21.57 $ w MH Pulse Teardrop $26.21 $ w MH Acorn $ w MH Colonial Premiere $ w MH Up Lighting $ w MH Gothic $ w MH Modern $ w MH Pendant $ w MH Rectilinear $ w MH Acorn Havre de Grace $ w MH Acorn Maple Lawn $ w MH Colonial Premiere $ w MH Pulse Rectilinear $ w MH Pulse Flood $21.98 Continued on Next Page P.S.C. Md. -- E-6 (Suppl ) Filed 12/18/1808/31/18 - Effective 02/01/1910/01/18

8 Baltimore Gas and Electric Company Electric -- Retail 59 Schedule PL Continued w MH Pulse Pendant Bronze $ w MH Pulse Pendant Gray $ w MH Flood $ w MH Pendant $ w MH Rectilinear $ w MH Pendant $ , w MH Pend/Flood $41.59 $ , w MH Rectilinear $57.24 $57.23 Where longer than 4-foot upsweep arms are required on 35-foot embedded wood poles for such lighting supply, add $ Lamp Fixtures LED fixtures Light-Emitting Diode* 39 LED 70 Pendant - 39 $ LED 100 Pendant - 51 $ LED 100 Pendant - 72 $ LED 100 Post Top Acorn $ LED 100 Post Top Arlington $ LED 100 Post Top Colonial $ LED 100 Post Top Modern $ LED 100 Post Top Decorative Acorn $ LED 100 Premiere Colonial $18.40 $ LED 150 Pendant - 72 $ LED 150 Pendant - 88 $ LED 150 Post Top Arlington $ LED 150 Post Top Colonial $18.53 $ LED 150 Post Top Acorn $ LED 150 Post Top Decorative Acorn $ LED 150 Tear Drop $ LED 150 Premiere Colonial $ LED 250 Pendant $ LED 250 Pendant $ LED 250 Tear Drop $ LED 400 Pendant $ LED 400 Pendant $ LED 400 Floodlight $ LED 1000 Floodlight $29.18 $29.17 *LED naming based on HID equivalent lamp watts 4. For the installation and maintenance of underground supplied lamp poles and cables each 12-foot square wood standard embedded post-top pole $15.66 each 12 foot fiberglass pole $15.66 each 12-foot fiberglass pole with shroud $25.70 each 14 foot fiberglass pole $15.66 each 14-foot embedded fiberglass post-top pole $15.66 each 14-foot fiberglass hinged pole $21.65 each 14-foot fluted black fiberglass pole $30.85 each 19-foot underground pole $22.01 each 20-foot round embedded bronze fiberglass pole each 30-foot round bronze fin $24.90 each 23 foot fiberglass pole with shroud $32.79 each 25-foot embedded metal pole $25.99 each 30-foot embedded metal pole $22.01 each 30-foot round embedded bronze fiberglass $26.79 each 30-foot round embedded bronze-fiberglass pole (incl. 1 arm) $29.54 Continued on Next Page P.S.C. Md. -- E-6 (Suppl ) Filed 12/18/1808/31/18 - Effective 02/01/1910/01/18

9 77-A Electric Retail Baltimore Gas and Electric Company Baltimore Gas & Electric Company Current Market-Priced Service Components (Transmission s Effective June 1, 2018) Generation Transmission Total SOS Energy Admin. Charge Applicable Total Generation Transm. incl. GRT, PSC Assess. Transm. incl. GRT, PSC Assess. $/kw 1 Taxes 2 RESIDENTIAL Schedule R Oct. 1, May 31, Feb. 1, May 31, Jun. 1, Sep. 30, Schedule RL Oct. 1, May 31, 2019 On-Peak Oct. 1, May 31, 2019 Int-Peak Oct. 1, May 31, 2019 Off-Peak Feb. 1, May 31, 2019 On-Peak Feb. 1, May 31, 2019 Int-Peak Feb. 1, May 31, 2019 Off-Peak Jun. 1, Sep. 30, 2019 On-Peak Jun. 1, Sep. 30, 2019 Int-Peak Jun. 1, Sep. 30, 2019 Off-Peak Schedule EV Oct. 1, May 31, 2019 On-Peak Oct. 1, May 31, 2019 Off-Peak Feb. 1, May 31, 2019 On-Peak Feb. 1, May 31, 2019 Off-Peak Jun. 1, Sep 30, 2019 On-Peak Jun. 1, Sep. 30, 2019 Off-Peak COMMERCIAL & INDUSTRIAL Scheds. G/GU -Type I SOS Oct. 1, May 31, Feb. 1, May 31, Jun. 1, Sep 30, Sched. GS - Type I SOS Oct. 1, May 31, 2019 On-Peak Oct. 1, May 31, 2019 Int-Peak Oct. 1, May 31, 2019 Off-Peak Feb. 1, May 31, 2019 On-Peak Feb. 1, May 31, 2019 Int-Peak Feb. 1, May 31, 2019 Off-Peak Jun. 1, Sep. 30, 2019 On-Peak Jun. 1, Sep. 30, 2019 Int-Peak Jun. 1, Sep. 30, 2019 Off-Peak Total Total $/kw Sched. SL - Type I SOS 3 Oct. 1, May 31, Feb. 1, May 31, Sched. PL - Type I SOS 3 Oct. 1, May 31, Feb. 1, May 31, Sched. G - Type II SOS Dec. 1, Feb. 28, Feb. 1, Feb. 28, Sched. GS - Type II SOS Dec. 1, Feb. 28, 2019 On-Peak Energy Dec. 1, Feb. 28, 2019 Inter-Peak Energy Dec. 1, Feb. 28, 2019 Off-Peak Energy Feb. 1, Feb. 28, 2019 On-Peak Energy Feb. 1, Feb. 28, 2019 Inter-Peak Energy Feb. 1, Feb. 28, 2019 Off-Peak Energy Scheds. GL, P & T - Type II SOS Dec. 1, Feb. 28, 2019 On-Peak Energy Dec. 1, Feb. 28, 2019 Inter-Peak Energy Dec. 1, Feb. 28, 2019 Off-Peak Energy Feb. 1, Feb. 28, 2019 On-Peak Energy Feb. 1, Feb. 28, 2019 Inter-Peak Energy Feb. 1, Feb. 28, 2019 Off-Peak Energy Scheds. GL, P & T - Type II SOS Transmission Demand Charge Note: 1 The Adminstrative Charge rates typically change every February, June and October. 2 Tax s: Gross Receipts Tax (GRT) = 2% (Transmission only) PSC Assessment = % (Effective October 2018) 3 Charge per lamp-watt ( /lamp-watt) = x = /lamp-watt; Sch. PL rate reflected in lamp fixture and renewal rates, effective February 2019October 2018 Total SOS rates exclude Rider 8 - Energy Cost Adjustment Hourly Administrative Charge = effective February 2019October 2018 P. S. C. Md. E-6 (Suppl ) Filed 10/26/1812/18/18 Effective 12/01/1802/01/19

10 Baltimore Gas and Electric Company Electric -- Retail 57 PRIVATE AREA LIGHTING ELECTRIC SCHEDULE P L AVAILABILITY: MONTHLY RATES: For unmetered outdoor area lighting of private property. 1. For supply of controlled electricity installation and maintenance of overhead supplied lamp fixtures and lamp renewals as required for each Mercury Vapor (limited to existing installations) w MV Pendant $ w MV Pendant $ w MV Pend/Flood $ , w MV Pendant $30.83 Sodium Vapor w SV Flood (limited to existing installations) $ w SV Pendant $ w SV Pendant $ w SV Pendant $ w SV Pend/Flood $ , w SV Pendant $48.24 Metal Halide (limited to existing installations) w MH Pulse Teardrop $ w MH Pulse Pendant $ w MH Pendant $ w MH Spot or Flood $ w MH Pendant $ w MH Pulse Flood/Spot $ w MH Pulse Pendant Gray $ , w MH Pend/Flood $ Where longer than 4-foot upsweep arms are required for such lighting supply, add $3.68 For each span of overhead wires required on existing and additional poles $1.60 For the installation and maintenance of overhead-supplied lamp poles each additional standard distribution wood pole $3.67 For supply of controlled electricity installation and maintenance of underground-supplied lamp fixtures and lamp renewals as required for each Mercury Vapor (limited to existing installations) w MV Modern/Colonial $ w MV Pend/Flood $14.22 Sodium Vapor w SV Colonial Modern (limited to existing installations) $ w SV Flood (limited to existing installations) $ w SV Gothic $14.45 Continued on Next Page P.S.C. Md. -- E-6 (Suppl. 624) Filed 12/18/18 - Effective 02/01/19

11 58 Baltimore Gas and Electric Company Electric -- Retail Schedule PL Continued w SV Acorn $ w SV Acorn Havre de Grace $ w SV Colonial Premiere $ w SV Acorn Maple Lawn $ w SV Pendant $ w SV Modern/Colonial $ w SV Pendant $ w SV Rectilinear $ w SV Acorn $ w SV Gothic $ w SV Acorn Victorian (limited to existing installations) $ w SV Colonial Premiere $ w SV Acorn Havre de Grace $ w SV Acorn Maple Lawn $ w SV Tear Drop $ w SV Pendant $ w SV Tear Drop $ w SV Pend/Flood $ w SV Rectilinear $ , w SV Pendant $43.34 Metal Halide (limited to existing installations) w MH Colonial $ w MH Acorn Maple Lawn $ w MH Acorn Havre de Grace $ w MH Acorn $ w MH Gothic $ w MH Towson green $ w MH Pulse Acorn Maple Lawn $ w MH Pulse Modern $ w MH Pulse Pendant $ w MH Pulse Acorn $ w MH Pulse Acorn Havre de Grace $ w MH Pulse Colonial $ w MH Pulse Gothic $ w MH Pulse Colonial Premiere $ w MH Pulse Rectilinear $ w MH Pulse Teardrop $ w MH Acorn $ w MH Colonial Premiere $ w MH Up Lighting $ w MH Gothic $ w MH Modern $ w MH Pendant $ w MH Rectilinear $ w MH Acorn Havre de Grace $ w MH Acorn Maple Lawn $ w MH Colonial Premiere $ w MH Pulse Rectilinear $ w MH Pulse Flood $21.98 Continued on Next Page P.S.C. Md. -- E-6 (Suppl. 624) Filed 12/18/18 - Effective 02/01/19

12 Baltimore Gas and Electric Company Electric -- Retail 59 Schedule PL Continued w MH Pulse Pendant Bronze $ w MH Pulse Pendant Gray $ w MH Flood $ w MH Pendant $ w MH Rectilinear $ w MH Pendant $ , w MH Pend/Flood $ , w MH Rectilinear $57.23 Where longer than 4-foot upsweep arms are required on 35-foot embedded wood poles for such lighting supply, add $ Lamp Fixtures LED fixtures Light-Emitting Diode* 39 LED 70 Pendant - 39 $ LED 100 Pendant - 51 $ LED 100 Pendant - 72 $ LED 100 Post Top Acorn $ LED 100 Post Top Arlington $ LED 100 Post Top Colonial $ LED 100 Post Top Modern $ LED 100 Post Top Decorative Acorn $ LED 100 Premiere Colonial $ LED 150 Pendant - 72 $ LED 150 Pendant - 88 $ LED 150 Post Top Arlington $ LED 150 Post Top Colonial $ LED 150 Post Top Acorn $ LED 150 Post Top Decorative Acorn $ LED 150 Tear Drop $ LED 150 Premiere Colonial $ LED 250 Pendant $ LED 250 Pendant $ LED 250 Tear Drop $ LED 400 Pendant $ LED 400 Pendant $ LED 400 Floodlight $ LED 1000 Floodlight $29.17 *LED naming based on HID equivalent lamp watts 4. For the installation and maintenance of underground supplied lamp poles and cables each 12-foot square wood standard embedded post-top pole $15.66 each 12 foot fiberglass pole $15.66 each 12-foot fiberglass pole with shroud $25.70 each 14 foot fiberglass pole $15.66 each 14-foot embedded fiberglass post-top pole $15.66 each 14-foot fiberglass hinged pole $21.65 each 14-foot fluted black fiberglass pole $30.85 each 19-foot underground pole $22.01 each 20-foot round embedded bronze fiberglass pole each 30-foot round bronze finished $24.90 each 23 foot fiberglass pole with shroud $32.79 each 25-foot embedded metal pole $25.99 each 30-foot embedded metal pole $22.01 each 30-foot round embedded bronze fiberglass $26.79 each 30-foot round embedded bronze-fiberglass pole (incl. 1 arm) $29.54 Continued on Next Page P.S.C. Md. -- E-6 (Suppl. 624) Filed 12/18/18 - Effective 02/01/19

13 77-A Electric Retail Baltimore Gas and Electric Company Baltimore Gas & Electric Company Current Market-Priced Service Components (Transmission s Effective June 1, 2018) Generation Transmission Total SOS Energy Admin. Charge Applicable Total Generation Transm. incl. GRT, PSC Assess. Transm. incl. GRT, PSC Assess. $/kw 1 Taxes 2 RESIDENTIAL Schedule R Feb. 1, May 31, Jun. 1, Sep. 30, Schedule RL Feb. 1, May 31, 2019 On-Peak Feb. 1, May 31, 2019 Int-Peak Feb. 1, May 31, 2019 Off-Peak Jun. 1, Sep. 30, 2019 On-Peak Jun. 1, Sep. 30, 2019 Int-Peak Jun. 1, Sep. 30, 2019 Off-Peak Schedule EV Feb. 1, May 31, 2019 On-Peak Feb. 1, May 31, 2019 Off-Peak Jun. 1, Sep 30, 2019 On-Peak Jun. 1, Sep. 30, 2019 Off-Peak COMMERCIAL & INDUSTRIAL Scheds. G/GU -Type I SOS Feb. 1, May 31, Jun. 1, Sep 30, Sched. GS - Type I SOS Feb. 1, May 31, 2019 On-Peak Feb. 1, May 31, 2019 Int-Peak Feb. 1, May 31, 2019 Off-Peak Jun. 1, Sep. 30, 2019 On-Peak Jun. 1, Sep. 30, 2019 Int-Peak Jun. 1, Sep. 30, 2019 Off-Peak Total Total $/kw Sched. SL - Type I SOS 3 Feb. 1, May 31, Sched. PL - Type I SOS 3 Feb. 1, May 31, Sched. G - Type II SOS Feb. 1, Feb. 28, Sched. GS - Type II SOS Feb. 1, Feb. 28, 2019 On-Peak Energy Feb. 1, Feb. 28, 2019 Inter-Peak Energy Feb. 1, Feb. 28, 2019 Off-Peak Energy Scheds. GL, P & T - Type II SOS Feb. 1, Feb. 28, 2019 On-Peak Energy Feb. 1, Feb. 28, 2019 Inter-Peak Energy Feb. 1, Feb. 28, 2019 Off-Peak Energy Scheds. GL, P & T - Type II SOS Transmission Demand Charge Note: 1 The Adminstrative Charge rates typically change every February, June and October. 2 Tax s: Gross Receipts Tax (GRT) = 2% (Transmission only) PSC Assessment = % (Effective October 2018) 3 Charge per lamp-watt ( /lamp-watt) = x = /lamp-watt; Sch. PL rate reflected in lamp fixture and renewal rates, effective February 2019 Total SOS rates exclude Rider 8 - Energy Cost Adjustment Hourly Administrative Charge = effective February 2019 P. S. C. Md. E-6 (Suppl. 624) Filed 12/18/18 Effective 02/01/19