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John C. Frain Director Regulatory Strategy & Revenue Policy P.O. Box 1475 Baltimore, Maryland 21203-1475 Telephone 410.470.1169 Fax 410.470.8022 www.bge.com john.frain@bge.com Via Electronic Filing April 28, 2017 David J. Collins, Executive Secretary Public Service Commission of Maryland William Donald Schaefer Tower 6 Saint Paul Street, 16 th Floor Baltimore, Maryland 21202-6806 Re: Case Nos. 9056/9064 - Revisions to P.S.C. Md. E-6 Residential, Type I and Type II Standard Offer Generation Market-Priced Service; and Revisions to P.S.C. Md. E-6 SOS Retail Transmission s Dear Mr. Collins: Baltimore Gas and Electric Company (BGE) files herewith Supplement 605 to P.S.C. Md. E-6, BGE s Retail Electric Service Tariff. Based on results from the April 24, 2017 procurement process, this filing revises Rider 1 Standard Offer Service (SOS) to include the Residential, Type I and Type II rates, Schedule PL Private Area Lighting, and Schedule EV Electric Vehicle TOU rates. The Residential, Type I, and Schedule EV rates cover the period October 1, 2017 through May 31, 2018. The Schedule PL Type I rates are effective June 1, 2017 through May 31, 2018. Type II rates are effective June 1, 2017 through August 31, 2017. These rates were approved by the Maryland Public Service Commission in Order No. 88164 issued April 28, 2017 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. Effective June 2017, the Company performed its first 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. 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. With this filing, the total SOS Administrative Charges for Residential, Type I and Type II, and Hourly Service will change effective with June 2017 bills from 2.94 mills per kwh, 1.74 mills per kwh, 1.74 mills per kwh, and 0.79 mills per kwh to 2.63 mills per kwh, 1.75 mills per kwh, 1.64 mills per kwh and 0.64 mills per kwh, respectively. The individual proposed cost components of BGE s Administrative Charge for Residential, Type I, Type II and Hourly Service customers are shown below. The Rider 1 Administrative Charges are also inclusive of the cumulative balances remaining from the Rider 10 rates in place through May 2017.

Attachment 1 Rider 1 Standard Offer Service and Schedule PL (Private Area Lighting) s Clean and Redlined Tariff Pages

77-A Electric Retail Baltimore Gas and Electric Company Baltimore Gas & Electric Company Current Market-Priced Service Components (Transmission s Effective June 1, 2017) 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 June 1, 2017 - Sept. 30, 2017 7.196 0.263 0.016 7.475 1.127-8.602 - Oct. 1, 2017 - May 31, 2018 6.894 0.263 0.015 7.1 1.127-8.299 - Schedule RL June 1, 2017 - Sept. 30, 2017 On-Peak 9.905 0.263 0.021 10.189 1.033-11.222 - June 1, 2017 - Sept. 30, 2017 Inter.-Peak 6.030 0.263 0.013 6.306 1.033-7.339 - June 1, 2017 - Sept. 30, 2017 Off-Peak 5.529 0.263 0.012 5.804 1.033-6.837 - Oct. 1, 2017 - May 31, 2018 On-Peak 8.271 0.263 0.018 8.552 1.033-9.585 - Oct. 1, 2017 - May 31, 2018 Inter.-Peak 7.092 0.263 0.015 7.370 1.033-8.403 - Oct. 1, 2017 - May 31, 2018 Off-Peak 6.213 0.263 0.014 6.490 1.033-7.523 - Schedule EV June 1, 2017 - Sept. 30, 2017 On-Peak 12.3 0.263 0.026 12.661 3.290-15.951 - June 1, 2017 - Sept. 30, 2017 Off-Peak 4.517 0.263 0.010 4.790 - - 4.790 - Oct. 1, 2017 - May 31, 2018 On-Peak 14.104 0.263 0.029 14.396 4.500-18.896 - Oct. 1, 2017 - May 30, 2018 Off-Peak 4.500 0.263 0.010 4.773 - - 4.773 - COMMERCIAL & INDUSTRIAL Scheds. G/GU -Type I SOS June 1, 2017 - Sept. 30, 2017 6.775 0.175 0.014 6.964 0.853-7.817 - Oct. 1, 2017 - May 31, 2018 6.459 0.175 0.013 6.647 0.853-7.500 - Sched. GS - Type I SOS June 1, 2017 - Sept. 30, 2017 On-Peak 10.343 0.175 0.021 10.539 0.735-11.274 - June 1, 2017 - Sept. 30, 2017 Inter.-Peak 6.396 0.175 0.013 6.584 0.735-7.319 - June 1, 2017 - Sept. 30, 2017 Off-Peak 5.534 0.175 0.011 5.0 0.735-6.455 - Oct. 1, 2017 - May 31, 2018 On-Peak 8.088 0.175 0.016 8.279 0.735-9.014 - Oct. 1, 2017 - May 31, 2018 Inter.-Peak 6.888 0.175 0.014 7.077 0.735-7.812 - Oct. 1, 2017 - May 31, 2018 Off-Peak 5.900 0.175 0.012 6.087 0.735-6.822 - Total Total $/kw Sched. SL - Type I SOS 3 Jun. 1, 2017 - May 31, 2018 5.193 0.175 0.010 5.378 - - 5.378 - Sched. PL - Type I SOS 3 Jun. 1, 2017 - May 31, 2018 5.193 0.175 0.010 5.378 - - 5.378 - Sched. G - Type II SOS Jun. 1, 2017 - Aug. 31, 2017 5.748 0.164 0.012 5.924 0.853-6.777 - Sched. GS - Type II SOS Jun. 1, 2017 - Aug. 31, 2017 On-Peak Energy 8.188 0.164 0.017 8.369 0.735-9.104 - Jun. 1, 2017 - Aug. 31, 2017 Inter-Peak Energy 5.097 0.164 0.010 5.271 0.735-6.006 - Jun. 1, 2017 - Aug. 31, 2017 Off-Peak Energy 4.212 0.164 0.009 4.385 0.735-5.120 - Scheds. GL, P & T - Type II SOS Jun. 1, 2017 - Aug. 31, 2017 On-Peak Energy 8.0 0.164 0.016 8.252 - - 8.252 - Jun. 1, 2017 - Aug. 31, 2017 Inter-Peak Energy 4.915 0.164 0.010 5.089 - - 5.089 - Jun. 1, 2017 - Aug. 31, 2017 Off-Peak Energy 4.139 0.164 0.008 4.311 - - 4.311 - Scheds. GL, P & T - Type II SOS Transmission Demand Charge - - - - - 2.86-2.86 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 = 0.2019% 3 Charge per lamp-watt ( /lamp-watt) = 5.378 x 0.333 = 1.791 /lamp-watt; Sch. PL rate reflected in lamp fixture and renewal rates Total SOS rates exclude Rider 8 - Energy Cost Adjustment Hourly Administrative Charge = 0.064 effective June 2017 P. S. C. Md. E-6 (Suppl. 605) Filed 04/28/17 Effective 06/01/17

Baltimore Gas and Electric Company Electric -- Retail 57 PRIVATE AREA LIGHTING ELECTRIC SCHEDULE P L AVAILABILITY: For unmetered outdoor area lighting of private property. MONTHLY RATES: 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) 117 100w MV Pendant $9.33 205 175w MV Pendant 11.32 454 400w MV Pend/Flood 17.18 1,090 1000w MV Pendant 32.31 Sodium Vapor 120 100w SV Flood (limited to existing installations) 10.88 120 100w SV Pendant 9.35 173 150w SV Pendant 10.95 298 250w SV Pendant 18.29 467 400w SV Pend/Flood 18.92 1,130 1000w SV Pendant 49.76 Metal Halide (limited to existing installations) 189 100w MH Pulse Teardrop 26.52 189 150w MH Pulse Pendant 18.31 205 175w MH Pendant 18.30 445 400w MH Spot or Flood 28.69 445 400w MH Pendant 28.38 448 400w MH Pulse Flood/Spot 28.69 448 400w MH Pulse Pendant Gray 28.38 1,090 1000w MH Pend/Flood 46.94 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 2. 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) 205 175w MV Modern/Colonial $12.64 454 400w MV Pend/Flood 14.83 Sodium Vapor 120 100w SV Colonial Modern (limited to existing installations) 10.92 120 100w SV Flood (limited to existing installations) 8.63 120 100w SV Gothic 14.62 Continued on Next Page P. S. C. Md. -- E-6 (Suppl. 605) Filed 04/28/17 - Effective 06/01/17

58 Baltimore Gas and Electric Company Electric -- Retail Schedule PL Continued 120 100w SV Acorn 14.66 120 100w SV Acorn Havre de Grace 16.07 120 100w SV Colonial Premiere 15.21 120 100w SV Acorn Maple Lawn 17.61 120 100w SV Pendant 8.63 173 150w SV Modern/Colonial 12.07 173 150w SV Pendant 8.57 173 150w SV Rectilinear 17.71 173 150w SV Acorn 16.30 173 150w SV Gothic 16.30 173 150w SV Acorn Victorian (limited to existing installations) 27.08 173 150w SV Colonial Premiere 16.82 173 150w SV Acorn Havre de Grace 17. 173 150w SV Acorn Maple Lawn 19.39 173 150w SV Tear Drop 35.33 298 250w SV Pendant 15.29 298 250w SV Tear Drop 45.45 467 400w SV Pend/Flood 16.52 467 400w SV Rectilinear 28.43 1,130 1000w SV Pendant 44.86 Metal Halide (limited to existing installations) 129 100w MH Colonial 15.19 129 100w MH Acorn Maple Lawn 23.33 129 100w MH Acorn Havre de Grace 21.27 129 100w MH Acorn 19.87 129 100w MH Gothic 19.92 129 100w MH Towson green 23.12 189 150w MH Pulse Acorn Maple Lawn 27.43 189 150w MH Pulse Modern 19.15 189 150w MH Pulse Pendant 17.21 189 150w MH Pulse Acorn 23.00 189 150w MH Pulse Acorn Havre de Grace 24.42 189 150w MH Pulse Colonial 17.84 189 150w MH Pulse Gothic 23.00 189 150w MH Pulse Colonial Premiere 19.57 189 150w MH Pulse Rectilinear 21.82 189 150w MH Pulse Teardrop 26.46 205 175w MH Acorn 22.99 205 175w MH Colonial Premiere 17.83 205 175w MH Up Lighting 29.38 205 175w MH Gothic 22.99 205 175w MH Modern 19.13 205 175w MH Pendant 17.20 205 175w MH Rectilinear 21.84 205 175w MH Acorn Havre de Grace 24.40 205 175w MH Acorn Maple Lawn 27.42 205 175w MH Colonial Premiere 19.55 448 400w MH Pulse Rectilinear 29.60 448 400w MH Pulse Flood 22.58 Continued on Next Page P. S. C. Md. -- E-6 (Suppl. 605) Filed 04/28/17 - Effective 06/01/17

Baltimore Gas and Electric Company Electric Retail 59 448 400w MH Pulse Pendant Bronze 24.45 448 400w MH Pulse Pendant Gray 25.05 445 400w MH Flood 22.58 445 400w MH Pendant 24.46 445 400w MH Rectilinear 29.62 445 400w MH Pendant 25.09 1,090 1000w MH Pend/Flood 43.06 1,090 1000w MH Rectilinear 58.71 Where longer than 4-foot upsweep arms are required on 35-foot embedded wood poles for such lighting supply, add 3.65 3. Lamp Fixtures LED fixtures 39 51 70 54 70 52 88 104 106 101 101 86 75 129 145 151 157 273 129 256 Light-Emitting Diode* LED 70 Pendant - 39 LED 100 Pendant - 51 LED 100 Pendant - 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 - 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 - 129 LED 250 Pendant - 145 LED 250 Tear Drop LED 400 Pendant - 157 LED 400 Pendant - 273 LED 400 Floodlight LED 1000 Floodlight *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 9.43 8.17 10.06 25.66 28.78 17.54 16.84 34.89 18.47 9.45 10.54 29.39 18.67 26.24 35.48 33.56 20.43 13.62 13.98 42.89 16.94 20.78 15.21 29.52 P. S. C. Md. -- E-6 (Suppl. 605) Filed 04/28/17 - Effective 06/01/17

77-A Electric Retail Baltimore Gas and Electric Company Baltimore Gas & Electric Company Current Market-Priced Service Components (Transmission s Effective June 1, 2016) (Transmission s Effective June 1, 2017) Generation Transmission Total SOS Energy Admin. Charge 1 Applicable Taxes 21 Total Generation Transm. incl. GRT, PSC Assess. Transm. incl. GRT, PSC Assess. $/kw RESIDENTIAL Schedule R Feb. 1, 2017 - May 31, 2017 7.655 0.294 0.016 7.965 0.919-8.884 - June 1, 2017 - Sept. 30, 2017 7.196 0.294 0.263 0.016 0.016 7.506 7.475 0.919 1.127-8.425 8.602 - Oct. 1, 2017 - May 31, 2018 6.894 0.263 0.015 7.1 1.127-8.299 - Schedule RL Feb. 1, 2017 - May 31, 2017 On-Peak 9.261 0.294 0.019 9.574 0.822-10.396 - Feb. 1, 2017 - May 31, 2017 Inter-Peak 6.984 0.294 0.015 7.293 0.822-8.115 - Feb. 1, 2017 - May 31, 2017 Off-Peak 6.954 0.294 0.015 7.263 0.822-8.085 - June 1, 2017 - Sept. 30, 2017 On-Peak 9.905 0.294 0.263 0.021 0.021 10.220 10.189 0.822 1.033-11.042 11.222 - June 1, 2017 - Sept. 30, 2017 Inter.-Peak 6.030 0.294 0.263 0.013 0.013 6.337 6.306 0.822 1.033-7.159 7.339 - June 1, 2017 - Sept. 30, 2017 Off-Peak 5.529 0.294 0.263 0.012 0.012 5.835 5.804 0.822 1.033-6.657 6.837 - Oct. 1, 2017 - May 31, 2018 On-Peak 8.271 0.263 0.018 8.552 1.033-9.585 - Oct. 1, 2017 - May 31, 2018 Inter.-Peak 7.092 0.263 0.015 7.370 1.033-8.403 - Oct. 1, 2017 - May 31, 2018 Off-Peak 6.213 0.263 0.014 6.490 1.033-7.523 - Schedule EV Feb. 1, 2017 - May 31, 2017 On-Peak 14.870 0.294 0.030 15.194 3.634-18.828 - Feb. 1, 2017 - May 31, 2017 Off-Peak 5.223 0.294 0.011 5.528 - - 5.528 - June 1, 2017 - Sept. 30, 2017 On-Peak 12.319 0.294 0.026 12.639 2.679-15.318 - June 1, 2017 - Sept. 30, 2017 Off-Peak 4.544 0.294 0.010 4.848 - - 4.848 - June 1, 2017 - Sept. 30, 2017 On-Peak 12.3 0.263 0.026 12.661 3.290-15.951 - June 1, 2017 - Sept. 30, 2017 Off-Peak 4.517 0.263 0.010 4.790 - - 4.790 - Oct. 1, 2017 - May 31, 2018 On-Peak 14.104 0.263 0.029 14.396 4.500-18.896 - Oct. 1, 2017 - May 30, 2018 Off-Peak 4.500 0.263 0.010 4.773 - - 4.773 - COMMERCIAL & INDUSTRIAL Scheds. G/GU -Type I SOS Feb. 1, 2017 - May 31, 2017 7.091 0.174 0.014 7.279 0.756-8.035 - June 1, 2017 - Sept. 30, 2017 6.775 0.174 0.175 0.014 0.014 6.963 6.964 0.756 0.853-7.719 7.817 - Oct. 1, 2017 - May 31, 2018 6.459 0.175 0.013 6.647 0.853-7.500 - Sched. GS - Type I SOS Feb. 1, 2017 - May 31, 2017 On-Peak 8.876 0.174 0.017 9.067 0.824-9.891 - Feb. 1, 2017 - May 31, 2017 Inter-Peak 7.008 0.174 0.014 7.196 0.824-8.020 - Feb. 1, 2017 - May 31, 2017 Off-Peak 6.275 0.174 0.012 6.461 0.824-7.285 - June 1, 2017 - Sept. 30, 2017 On-Peak 10.343 0.174 0.175 0.021 0.021 10.538 10.539 0.824 0.735-11.362 11.274 - June 1, 2017 - Sept. 30, 2017 Inter.-Peak 6.396 0.174 0.175 0.013 0.013 6.583 6.584 0.824 0.735-7.407 7.319 - June 1, 2017 - Sept. 30, 2017 Off-Peak 5.534 0.174 0.175 0.011 0.011 5.719 5.0 0.824 0.735-6.543 6.455 - Oct. 1, 2017 - May 31, 2018 On-Peak 8.088 0.175 0.016 8.279 0.735-9.014 - Oct. 1, 2017 - May 31, 2018 Inter.-Peak 6.888 0.175 0.014 7.077 0.735-7.812 - Oct. 1, 2017 - May 31, 2018 Off-Peak 5.900 0.175 0.012 6.087 0.735-6.822 - Total Total $/kw Sched. SL - Type I SOS 32 Feb. 1, 2017 - May 31, 2017 5.380 0.174 0.011 5.565 - - 5.565 - Jun. 1, 2017 - May 31, 2018 5.193 0.175 0.010 5.378 - - 5.378 - Sched. PL - Type I SOS 32 Feb. 1, 2017 - May 31, 2017 5.380 0.174 0.011 5.565 - - 5.565 - Jun. 1, 2017 - May 31, 2018 5.193 0.175 0.010 5.378 - - 5.378 - Sched. G - Type II SOS Mar. 1, 2017 - May 31, 2017 5.755 0.174 0.012 5.941 0.756-6.697 - Jun. 1, 2017 - Aug. 31, 2017 5.748 0.164 0.012 5.924 0.853-6.777 - Sched. GS - Type II SOS Mar. 1, 2017 - May 31, 2017 On-Peak Energy 6.738 0.174 0.014 6.926 0.824-7.750 - Mar. 1, 2017 - May 31, 2017 Inter-Peak Energy 6.405 0.174 0.013 6.592 0.824-7.416 - Mar. 1, 2017 - May 31, 2017 Off-Peak Energy 5.006 0.174 0.010 5.190 0.824-6.014 - Jun. 1, 2017 - Aug. 31, 2017 On-Peak Energy 8.188 0.164 0.017 8.369 0.735-9.104 - Jun. 1, 2017 - Aug. 31, 2017 Inter-Peak Energy 5.097 0.164 0.010 5.271 0.735-6.006 - Jun. 1, 2017 - Aug. 31, 2017 Off-Peak Energy 4.212 0.164 0.009 4.385 0.735-5.120 - Scheds. GL, P & T - Type II SOS Mar. 1, 2017 - May 31, 2017 On-Peak Energy 6.6 0.174 0.014 6.914 - - 6.914 - Mar. 1, 2017 - May 31, 2017 Inter-Peak Energy 6.501 0.174 0.013 6.688 - - 6.688 - Mar. 1, 2017 - May 31, 2017 Off-Peak Energy 5.126 0.174 0.010 5.310 - - 5.310 - Jun. 1, 2017 - Aug. 31, 2017 On-Peak Energy 8.0 0.164 0.016 8.252 - - 8.252 - Jun. 1, 2017 - Aug. 31, 2017 Inter-Peak Energy 4.915 0.164 0.010 5.089 - - 5.089 - Jun. 1, 2017 - Aug. 31, 2017 Off-Peak Energy 4.139 0.164 0.008 4.311 - - 4.311 - Scheds. GL, P & T - Type II SOS Transmission Demand Charge - - - - - 2.80-2.80 Transmission Demand Charge - - - - - 2.86-2.86 Note: 1 The Adminstrative Charge rates typically change every February, June and October. 21 Tax s: Gross Receipts Tax (GRT) = 2% (Transmission only) PSC Assessment = 0.1958% PSC Assessment (Type II s effective Dec. 1, 2016) = 0.2019% 2 Charge per lamp-watt ( /lamp-watt) = 5.565 x 0.333 = 1.853 /lamp-watt; Sch. PL rate reflected in lamp fixture and renewal rates 3 Charge per lamp-watt ( /lamp-watt) = 5.378 x 0.333 = 1.791 /lamp-watt; Sch. PL rate reflected in lamp fixture and renewal rates Total SOS rates exclude Rider 8 - Energy Cost Adjustment Hourly Administrative Charge = 0.079 effective February 2017 Hourly Administrative Charge = 0.064 effective June 2017 P. S. C. Md. E-6 (Suppl. 601605) Filed 02/06/201704/28/17 Effective 03/01/1706/01/17

Baltimore Gas and Electric Company Electric -- Retail 57 PRIVATE AREA LIGHTING ELECTRIC SCHEDULE P L AVAILABILITY: For unmetered outdoor area lighting of private property. MONTHLY RATES: 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) 117 100w MV Pendant $9.399.33 205 175w MV Pendant 11.4311.32 454 400w MV Pend/Flood 17.4317.18 1,090 1000w MV Pendant 32.9132.31 Sodium Vapor 120 100w SV Flood (limited to existing installations) 10.9510.88 120 100w SV Pendant 9.429.35 173 150w SV Pendant 11.0510.95 298 250w SV Pendant 18.4518.29 467 400w SV Pend/Flood 19.1818.92 1,130 1000w SV Pendant 50.3849.76 Metal Halide (limited to existing installations) 189 100w MH Pulse Teardrop 26.6226.52 189 150w MH Pulse Pendant 18.4118.31 205 175w MH Pendant 18.4118.30 445 400w MH Spot or Flood 28.9328.69 445 400w MH Pendant 28.6228.38 448 400w MH Pulse Flood/Spot 28.9428.69 448 400w MH Pulse Pendant Gray 28.6328.38 1,090 1000w MH Pend/Flood 47.5446.94 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 2. 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) 205 175w MV Modern/Colonial $12.7512.64 454 400w MV Pend/Flood 15.0814.83 Sodium Vapor 120 100w SV Colonial Modern (limited to existing installations) 10.9910.92 120 100w SV Flood (limited to existing installations) 8.708.63 120 100w SV Gothic 14.6914.62 Continued on Next Page P. S. C. Md. -- E-6 (Suppl. 598605) Filed 01/06/1704/28/17 - Effective 02/06/1706/01/17

58 Baltimore Gas and Electric Company Electric -- Retail Schedule PL Continued 120 100w SV Acorn 14.7314.66 120 100w SV Acorn Havre de Grace 16.1416.07 120 100w SV Colonial Premiere 15.2815.21 120 100w SV Acorn Maple Lawn 17.6817.61 120 100w SV Pendant 8.708.63 173 150w SV Modern/Colonial 12.1712.07 173 150w SV Pendant 8.678.57 173 150w SV Rectilinear 17.8117.71 173 150w SV Acorn 16.4016.30 173 150w SV Gothic 16.4016.30 173 150w SV Acorn Victorian (limited to existing installations) 27.1827.08 173 150w SV Colonial Premiere 16.9216.82 173 150w SV Acorn Havre de Grace 17.8217. 173 150w SV Acorn Maple Lawn 19.4919.39 173 150w SV Tear Drop 35.4335.33 298 250w SV Pendant 15.4515.29 298 250w SV Tear Drop 45.6145.45 467 400w SV Pend/Flood 16.7816.52 467 400w SV Rectilinear 28.6928.43 1,130 1000w SV Pendant 45.4844.86 Metal Halide (limited to existing installations) 129 100w MH Colonial 15.2615.19 129 100w MH Acorn Maple Lawn 23.4023.33 129 100w MH Acorn Havre de Grace 21.3421.27 129 100w MH Acorn 19.9419.87 129 100w MH Gothic 19.9919.92 129 100w MH Towson green 23.1923.12 189 150w MH Pulse Acorn Maple Lawn 27.5327.43 189 150w MH Pulse Modern 19.2519.15 189 150w MH Pulse Pendant 17.3117.21 189 150w MH Pulse Acorn 23.1023.00 189 150w MH Pulse Acorn Havre de Grace 24.5224.42 189 150w MH Pulse Colonial 17.9417.84 189 150w MH Pulse Gothic 23.1023.00 189 150w MH Pulse Colonial Premiere 19.6719.57 189 150w MH Pulse Rectilinear 21.9221.82 189 150w MH Pulse Teardrop 26.5626.46 205 175w MH Acorn 23.1022.99 205 175w MH Colonial Premiere 17.9417.83 205 175w MH Up Lighting 29.4929.38 205 175w MH Gothic 23.1022.99 205 175w MH Modern 19.2419.13 205 175w MH Pendant 17.3117.20 205 175w MH Rectilinear 21.9521.84 205 175w MH Acorn Havre de Grace 24.5124.40 205 175w MH Acorn Maple Lawn 27.5327.42 205 175w MH Colonial Premiere 19.6619.55 448 400w MH Pulse Rectilinear 29.8529.60 448 400w MH Pulse Flood 22.8322.58 Continued on Next Page P. S. C. Md. -- E-6 (Suppl. 598605) Filed 01/06/1704/28/17 - Effective 02/06/1706/01/17

Baltimore Gas and Electric Company Electric Retail 59 448 400w MH Pulse Pendant Bronze 24.7024.45 448 400w MH Pulse Pendant Gray 25.3025.05 445 400w MH Flood 22.8222.58 445 400w MH Pendant 24.7024.46 445 400w MH Rectilinear 29.8629.62 445 400w MH Pendant 25.3325.09 1,090 1000w MH Pend/Flood 43.6643.06 1,090 1000w MH Rectilinear 59.3158.71 Where longer than 4-foot upsweep arms are required on 35-foot embedded wood poles for such lighting supply, add 3.65 3. Lamp Fixtures LED fixtures 39 51 70 54 70 52 88 104 106 101 101 86 75 129 145 151 157 273 129 256 Light-Emitting Diode* LED 70 Pendant - 39 LED 100 Pendant - 51 LED 100 Pendant - 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 - 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 - 129 LED 250 Pendant - 145 LED 250 Tear Drop LED 400 Pendant - 157 LED 400 Pendant - 273 LED 400 Floodlight LED 1000 Floodlight *LED naming based on HID equivalent lamp watts 9.459.43 8.208.17 10.1010.06 25.7025.66 28.8228.78 17.5817.54 16.8716.84 34.9334.89 18.5018.47 9.499.45 10.5910.54 29.4529.39 18.7318.67 26.3026.24 35.5435.48 33.6133.56 20.40.43 13.6913.62 14.0613.98 42.9742.89 17.0316.94 20.9320.78 15.2815.21 29.6629.52 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. 600605) Filed 02/03/1704/28/17 - Effective 03/06/1706/01/17

Attachment 2 Development of the Retail Transmission s

BGE SOS Retail Transmission s June 2017 - May 2018 Period Prepared: April 24, 2017 R RL G/GU GS GL/P (a) Eligible Transmission PLC (MW) 3,307.4 242.8 570.2 46.3 1,278.0 (b=a*c) SOS Transmission PLC (MW) 2,459.5 1.9 296.3 7.4 241.9 (c) Retention 74.4% 71.2% 52.0% 16.0% 18.9% (d) Eligible Volume Forecast (MWh) 11,414,361 902,295 2,710,499 216,947 6,768,156 (e) SOS Volume Forecast (MWh) 8,437,985 647,134 1,343,209 38,958 1,256,418 (f=e/d) Retention Forecast 73.9% 71.7% 49.6% 18.0% 18.6% (g) Eligible Billing Demand Forecast (MW, 12Months) n/a n/a n/a n/a 17,564 (h) SOS Billing Demand Forecast (MW, 12Months) n/a n/a n/a n/a 3,268 (i=h/g) Retention Forecast n/a n/a n/a n/a 18.6% (j) NITS ($/MWYear) $ 32,851 $ 32,851 $ 32,851 $ 32,851 $ 32,851 (k=j*b) SOS NITS Charge Forecast ($) $ 80,795,554 $ 5,678,458 $ 9,735,102 $ 243,224 $ 7,947,603 (l) POLR Non Firm Pt to Pt Credits Forecast (Sch 8) $ (106,462) $ (7,482) $ (12,828) $ (320) $ (10,4) (m) Transmission Enhancement (Sch 12) $ 12,320,341 $ 865,896 $ 1,484,485 $ 37,089 $ 1,211,913 (n) Transmission Expansion Cost Recovery (Sch 13) $ - $ - $ - $ - $ - (o) Net Charge Forecast $ 93,009,433 $ 6,536,871 $ 11,206,759 $ 279,992 $ 9,149,043 (p) PSC / GRT Tax 2.2019% 2.2019% 2.2019% 2.2019% 2.2019% q=o/e/(1-p) ($/MWh) - Grossed up for Taxes $ 11.27 $ 10.33 $ 8.53 $ 7.35 n/a r=o/h/(1-p) ($/MWMonth) Grossed up for Taxes n/a n/a n/a n/a $ 2,862.86 s=q/1000 ($/kwh) $ 0.01127 $ 0.01033 $ 0.00853 $ 0.00735 n/a t=r/1000 ($/kwmonth) n/a n/a n/a n/a $2.86