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10 Peachtree Place Atlanta, GA 30309 404 584 4000 December 1, 2020 Mr. Reece McAlister Executive Secretary Georgia Public Service Commission 244 Washington Street Atlanta, GA 30334 Annual Filing of Atlanta Gas Light Company Docket No. 42315 Dear Mr. McAlister, Enclosed please find an original and fifteen copies of Atlanta Gas Light Company's Annual Filing in the above referenced docket. Sincerely, Elizabeth Wade STATE OF GEORGIA BEFORE THE GEORGIA PUBLIC SERVICE COMMISSION IN RE ) ATLANTA GAS LIGHT COMPANY'S ) DOCKET NO. 42315 NOTICE OF ELECTION AND ) APPLICATION TO ESTABLISH ) RATES ) ATLANTA GAS LIGHT COMPANY’S ANNUAL TRUE-UP REPORTING REQUIREMENTS Atlanta Gas Light Company ("AGLC") hereby files with the Georgia Public Service Commission ("Commission") its annual true-up reporting requirements. This filing includes the annual true-up reports for: 1) the Annual Daily Balancing True-Up pursuant to Section 20.1.6 of the Terms of Service; and 2) the Annual Fuel Percentage True- pursuant to Section 4.4 of Rate Schedule PS. The applicable time period for each filing is October 1, 2019 through September 30, 2020. The attached worksheets show the various true-up calculations. This 1st day of December 2020. Respectfully submitted, __________________________ Elizabeth Wade Chief Counsel Southern Company Gas Ten Peachtree Place 15th Floor Atlanta, GA 30309 CERTIFICATE OF SERVICE I, Elizabeth Wade, certify that I have this day served the within and foregoing “Atlanta Gas Light Company’s Annual True-up Reporting Requirements” in Docket No. 42315 upon the parties to this proceeding, by depositing same in the United States mail, stamped and addressed as follows: Joseph C. Monroe Jim Clarkson SouthStar Energy Services LLC Resource Supply Management 817 W. Peachtree Street, NW 998 Veterans Memorial Highway Suite 1000 Mableton, Georgia 30126 Atlanta, Georgia 30308 Robert B. Remar L. Craig Dowdy Roger & Hardin, LLP McKenna, Long & Aldridge, LLP 2700 International Tower One Peachtree Center Peachtree Corner 303 Peachtree Street, Suite 5300 229 Peachtree Street, NE Atlanta, Georgia 30308 Atlanta, GA 30303 Meredith W. Hodges Mark Baxter VP of HR and External Affairs Stone & Baxter LLP Gas South, LLC 577 Mulberry Street, Suite 800 3625 Cumberland Blvd, Suite 1500 Macon, GA 31201 Atlanta, GA 30339 Claire McGuire Michael O. Kimsey Georgia Watch Resource Service Ministries, Inc. 55 Marietta Street, N.W. Suite 903 751 Rice Street, NW Atlanta, GA 30303 Atlanta, GA 30318 Brett Newsom, Director William Bradley Carver Regulatory Affairs & Pricing Hall Booth Smith & Solver, PC SCANA Energy 191 Peachtree Street, NW 3344 Peachtree Road, NE Suite 2900 Suite 2150 Atlanta, GA 30303 Atlanta, GA 30318 This 1st day of December 2020 __________________________ Elizabeth Wade Chief Counsel Marketer Accessible Retained Storage (MARS) Revenue/Cost Comparison - 12 months ending September 2020 Total Throughput w/o .08% loss factor 2000 277,895,678 Injection / Withdrawal 2001 245,116,501 2002 253,810,549 Total Revenue $ 1,614,822.89 2003 246,362,153 2004 237,194,105 Total Costs $ 1,167,794.24 2005 252,075,797 2006 224,843,874 FY 2019/20 Over/(Under) Collection $ 447,028.65 2007 222,052,342 2008 215,796,143 Carry Forward from Sept 2019 (15,990.49) 2009 215,262,000 2010 223,104,106 Total Over(Under) to Recover 431,038.16 2011 212,694,919 2012 210,315,865 2013 220,025,521 FD/ID Volumetric rate for 2021: 2014 236,359,946 2015 232,688,069 Billing Determinants * 210,541,309 2016 204,657,500 2017 192,858,548 Volumetric Rate -0.002047285 ◄◄◄◄ 2018 227,249,613 2019 223,530,204 2020 210,541,309 * 2019/20 actual MARS volumetric usage Bundled Peaking Pipeline Sales Service (BPPSS) Revenue/Cost Comparison - 12 months ending September 2020 Withdrawal Revenue $ - Injection/Withdrawal Cost $ - FY 2018 Remaining Over/(Under) Collection $ - Carry Forward from Sept 2019 16,730.04 . Total Over(Under) to Recover 16,730.04 Rate Surcharge: Billing Determinants* 904,876 Unit Rate for Adjustment ($0.0185) * BPPSS capacity in Dt's Bundled Peaking Pipeline Sales Service (BPPSS) Fuel Recovery W/D Fuel Fuel Billed to AGLC - Fuel Recovered from Marketers - FY 2020 Remaining Over/(Under)Collection - Carry Forward from Sept 2019 23,323 Total Over/(Under) Collected DT's 23,323 Rate Adjustment for 2021: Current Fuel Rate 7.8160% Billing Determinants 904,876 Unit Rate for adjustment -2.5775% New Fuel Rate 5.2385% Firm Interuptible No Notice Sales Service (FINSS) Revenue/Cost Comparison - 12 months ending September 2020 Withdrawal Revenue $ 6,419.76 Injection/Withdrawal Cost $ 16,193.26 FY 2019 Remaining Over/(Under) Collection $ (9,773.50) Carry Forward from Sept 2019 544,459.95 Total Over(Under) to Recover 534,686.45 Rate Surcharge: Billing Determinants* 13,875,166 Unit Rate for Adjustment $ (0.0385) * FINSS capacity in Decatherms Firm Interuptible No Notice Sales Service (FINSS) Fuel Recovery W/D Fuel Fuel Billed to AGLC 37,394 Fuel Recovered from Marketers 45,494 Prior Period Adjustment - FY 2020 Remaining Over/(Under) Collection 8,100 Carry Forward from Sept 2019 (40,353) Total Over/(Under) Collected DT's (32,253) Rate Adjustment for 2020: Current Fuel Rate 3.1357% Billing Determinants 13,875,166 Unit Rate for adjustment 0.2325% New Fuel Rate 3.3682% FY 2019/2020 Peaking Fuel Rate True-Up Injection Withdrawal 2020 Marketer Peaking Fuel Rate 14.52% 1.42% Actual LNG Fuel Rate 20.76% 1.86% Physical New Marketer Peaking Fuel Rate 20.76% 1.86% 2021 rate adjustment factor 1.75% -0.82% Total New Rate for 2021 22.51% 1.03%.