NORTHERN INDIANA PUBLIC SERVICE COMPANY Attachment GG True-Up Adjustment For the Year Ended December 31, 2014

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1 NORTHERN INDIANA PUBLIC SERVICE COMPANY Attachment GG True-Up Adjustment For the Year Ended December 31, 2014 Attachment GG Projected Proportion Actual True Up Revenue of Revenues Revenue Interest allocated Net of Project Requirement % of total Distributed Requirement True Up to projects Interest 1a MTEP $ 1,123, % $ 1,160,249 $ 1,139,348 $ (20,901) $ (1,359) $ (22,260) 1b MTEP , % 868, ,381 (16,098) (1,046) (17,144) 1c MTEP GIP 397, % 410, ,289 (7,638) (496) (8,134) 1d MTEP ,853, % 1,914,291 1,886,803 (27,488) (1,787) (29,275) 2 Subtotal $ 4,215,179 $ 4,353,947 $ 4,281,822 3 Under/(Over) Recovery $ (72,125) $ (4,688) $ (76,813) 4 Applicable interest rate per month (expressed to four decimal places) %

2 Page 1 of 2 To be completed in conjunction with Attachment O. (1) (2) (3) (4) Attachment O Line Page, Line, Col. Transmission Allocator 1 Gross Transmission Plant - Total Attach O, p 2, line 2 col 5 (Note A) 915,622,752 2 Net Transmission Plant - Total Attach O, p 2, line 14 and 23b col 5 (Note B) 475,099,154 O&M EXPENSE 3 Total O&M Allocated to Transmission Attach O, p 3, line 8 col 5 41,405,171 4 Factor for O&M (line 3 divided by line 1 col 3) 4.52% 4.52% GENERAL AND COMMON (G&C) DEPRECIATION EXPENSE 5 Total G&C Depreciation Expense Attach O, p 3, lines 10 & 11, col 5 (Note H) 6,451,101 6 Factor for G&C Depreciation Expense (line 5 divided by line 1 col 3) 0.70% 0.70% TAXES OTHER THAN INCOME TAXES 7 Total Other Taxes Attach O, p 3, line 20 col 5 5,524,818 8 Factor for Other Taxes (line 7 divided by line 1 col 3) 0.60% 0.60% 9 Factor for Expense Sum of line 4, 6, and % INCOME TAXES 10 Total Income Taxes Attach O, p 3, line 27 col 5 19,889, Factor for Income Taxes (line 10 divided by line 2 col 3) 4.19% 4.19% RETURN 12 Return on Rate Base Attach O, p 3, line 28 col 5 40,560, Factor for Return on Rate Base (line 12 divided by line 2 col 3) 8.54% 8.54% 14 Factor for Return Sum of line 11 and % 12.72%

3 Page 2 of 2 Network Upgrade Charge Calculation By Project Line Project Name (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) Project MTEP Project Project Gross Factor for Expense Project Net Factor for Return Depreciation Revenue True-Up Network Number Plant Expense Charge Plant Return Charge Expense Requirement Adjustment Upgrade Charge (Note C) (Page 1 line 9) (Col. 3 * Col. 4) (Note D) (Page 1 line 14) (Col. 6 * Col. 7) (Note E) (Sum Col. 5, 8 & 9) (Note F) Sum Col. 10 & 11 (Note G) 1a MTEP $ 5,786, % $337,374 $ 4,983, % $634,112 $167,862 $1,139,348 1,139,348 1b MTEP $ 4,422, % $257,837 $ 3,696, % $470,364 $124,180 $852, ,381 1c MTEP GIP $ 2,075, % $120,982 $ 1,738, % $221,196 $61,111 $403, ,289 1d MTEP $ 9,263, % $540,079 $ 8,480, % $1,079,076 $267,648 $1,886,803 1,886,803 2 Totals $4,281,822 - $4,281,822 3 Rev. Req. Adj For Attachment O $4,281,822 Note Letter A B C D E F G H Gross Transmission Plant is that identified on page 2 line 2 of Attachment O and includes any sub lines 2a or 2b etc. and is inclusive of any CWIP included in rate base when authorized by FERC order less any prefunded AFUDC, if applicable. Net Transmission Plant is that identified on page 2 line 14 of Attachment O and includes any sub lines 14a or 14b etc. and is inclusive of any CWIP included in rate base when authorized by FERC order less any prefunded AFUDC, if applicable. Project Gross Plant is the total capital investment for the project calculated in the same method as the gross plant value in line 1 and includes CWIP in rate base less any prefunded AFUDC, if applicable. This value includes subsequent capital investments required to maintain the facilities to their original capabilities. Project Net Plant is the Project Gross Plant Identified in Column 3 less the associated Accumulated Depreciation. Project Depreciation Expense is the actual value booked for the project and included in the Depreciation Expense in Attachment O page 3 line 12. True-Up Adjustment is included pursuant to a FERC approved methodology if applicable. The Network Upgrade Charge is the value to be used in Schedules 26, 37 and 38. The Total General and Common Depreciation Expense excludes any depreciation expense directly associated with a project and thereby included in page 2 column 9.

4 Page 1 of 2 To be completed in conjunction with Attachment O. (1) (2) (3) (4) Attachment O Line Page, Line, Col. Transmission Allocator 1 Gross Transmission Plant - Total Attach O, p 2, line 2 col 5 (Note A) 902,865,839 2 Net Transmission Plant - Total Attach O, p 2, line 14 and 23b col 5 (Note B) 466,367,712 O&M EXPENSE 3 Total O&M Allocated to Transmission Attach O, p 3, line 8 col 5 41,236,479 4 Factor for O&M (line 3 divided by line 1 col 3) 4.57% 4.57% GENERAL AND COMMON (G&C) DEPRECIATION EXPENSE 5 Total G&C Depreciation Expense Attach O, p 3, lines 10 & 11, col 5 (Note H) 7,525,880 6 Factor for G&C Depreciation Expense (line 5 divided by line 1 col 3) 0.83% 0.83% TAXES OTHER THAN INCOME TAXES 7 Total Other Taxes Attach O, p 3, line 20 col 5 6,267,590 8 Factor for Other Taxes (line 7 divided by line 1 col 3) 0.69% 0.69% 9 Factor for Expense Sum of line 4, 6, and % INCOME TAXES 10 Total Income Taxes Attach O, p 3, line 27 col 5 18,472, Factor for Income Taxes (line 10 divided by line 2 col 3) 3.96% 3.96% RETURN 12 Return on Rate Base Attach O, p 3, line 28 col 5 37,927, Factor for Return on Rate Base (line 12 divided by line 2 col 3) 8.13% 8.13% 14 Factor for Return Sum of line 11 and % 12.09%

5 Page 2 of 2 Network Upgrade Charge Calculation By Project Line Project Name (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) Project MTEP Project Project Gross Factor for Expense Factor for Return Depreciation Revenue True-Up Network Number Plant Expense Charge Project Net Plant Return Charge Expense Requirement Adjustment Upgrade Charge (Note C) (Page 1 line 9) (Col. 3 * Col. 4) (Note D) (Page 1 line 14) (Col. 6 * Col. 7) (Note E) (Sum Col. 5, 8 & 9) (Note F) Sum Col. 10 & 11 (Note G) 1a MTEP $ 5,786, % $352,709 $ 4,983, % $602,699 $167,862 $1,123, $ - 1,123,270 1b MTEP $ 4,422, % $269,557 $ 3,696, % $447,062 $124,180 $840, $ - 840,799 1c MTEP GIP $ 2,075, % $126,481 $ 1,738, % $210,238 $61,111 $397, $ - 397,830 1d MTEP $ 9,241, % $563,247 $ 8,459, % $1,022,983 $267,049 $1,853, $ - 1,853,279 2 Totals $4,215,179 $0 $4,215,179 3 Rev. Req. Adj For Attachment O $4,215,179 Note Letter A B C D E F G H Gross Transmission Plant is that identified on page 2 line 2 of Attachment O and includes any sub lines 2a or 2b etc. and is inclusive of any CWIP included in rate base when authorized by FERC orderless any prefunded AFUDC, if applicable. Net Transmission Plant is that identified on page 2 line 14 of Attachment O and includes any sub lines 14a or 14b etc. and is inclusive of any CWIP included in rate base when authorized by FERC order less any prefunded AFUDC, if applicable. Project Gross Plant is the total capital investment for the project calculated in the same method as the gross plant value in line 1 and includes CWIP in rate base less any prefunded AFUDC, if applicable. This value includes subsequent capital investments required to maintain the facilities to their original capabilities. Project Net Plant is the Project Gross Plant Identified in Column 3 less the associated Accumulated Depreciation. Project Depreciation Expense is the actual value booked for the project and included in the Depreciation Expense in Attachment O page 3 line 12. True-Up Adjustment is included pursuant to a FERC approved methodology if applicable. The Network Upgrade Charge is the value to be used in Schedules 26, 37 and 38. The Total General and Common Depreciation Expense excludes any depreciation expense directly associated with a project and thereby included in page 2 column 9.

6 - Supporting Data for Network Upgrade Charge Calculation True-Up Transmission Owner Rate Year 2014 Reporting Company MTEP Project ID GIP 2322 Project 5 Project 6 Project 7 Project 8 Project 9 Project 10 Pricing Zone East - NIPS East East - NIPS East XYZ XYZ XYZ XYZ XYZ XYZ Type Per Attachment FF Reliability Reliability GIP Reliability GIP GIP GIP GIP GIP GIP Gross Plant December 2013 $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Column (3) January 2014 $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 February $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 March $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 April $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 May $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 June $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 July $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 August $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 September $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 October $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 November $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 December 2014 $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $ Month Average $5,786, $4,422, $2,075, $9,263, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Accumulated December 2013 $719, $663, $306, $649, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Depreciation January 2014 $733, $674, $311, $671, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 February $747, $684, $316, $693, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 March $761, $694, $321, $716, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 April $775, $705, $326, $738, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 May $789, $715, $331, $760, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 June $803, $725, $336, $782, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 July $817, $736, $341, $805, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 August $831, $746, $346, $827, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 September $845, $756, $351, $849, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 October $859, $767, $357, $872, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 November $873, $777, $362, $894, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 December 2014 $887, $787, $367, $916, $0.00 $0.00 $0.00 $0.00 $0.00 $ Month Average $803, $725, $336, $782, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Net Plant December 2013 $5,067, $3,758, $1,769, $8,614, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Column (6) January 2014 $5,053, $3,748, $1,763, $8,592, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 February $5,039, $3,738, $1,758, $8,570, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 March $5,025, $3,727, $1,753, $8,547, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 April $5,011, $3,717, $1,748, $8,525, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 May $4,997, $3,707, $1,743, $8,503, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 June $4,983, $3,696, $1,738, $8,480, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 July $4,969, $3,686, $1,733, $8,458, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 August $4,955, $3,676, $1,728, $8,436, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 September $4,941, $3,665, $1,723, $8,413, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 October $4,927, $3,655, $1,718, $8,391, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 November $4,913, $3,645, $1,712, $8,369, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 December 2014 $4,899, $3,634, $1,707, $8,347, $0.00 $0.00 $0.00 $0.00 $0.00 $ Month Average $4,983, $3,696, $1,738, $8,480, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Depreciation Expense Project Depreciation Expense $167, $124, $61, $267, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 Column (9) Project Amortization Expense $0 $0 $0 $0 $0 $0 Depreciation Expense Total $167, $124, $61, $267, $0.00 $0.00 $0.00 $0.00 $0.00 $0.00

7 - Description of Facilities Included in Network Upgrade Charge MTEP Project ID Facility ID Project Record Date Description of Facilities Included in Network Upgrade Charge as of Record Date MTEP07 Add 2nd 345/138 kv Transformer MTEP07 Add 2nd 345/138 KV transformer MTEP08 Add 2nd 138kV circuit MTEP07 Amount related to 138 kv Ring Bus Interconnection Substation MTEP07 Protection and Relay($930,000), 138XX and 138YY Line Extensions 900 MCM ACSR with Static Wire ($60,000) MTEP07 Reconductor/rebuild circuit 6966 to 477 MCM conductor (7.7 mi.) MTEP11 Install a 560 MVA 345/138 kv transformer, (1) 345 kv and (1) 138 kv circuit breaker and associated equipment at Green Acres Substation.

ATTACHMENTS ATTACHMENT GG NETWORK UPGRADE CHARGE

ATTACHMENTS ATTACHMENT GG NETWORK UPGRADE CHARGE ATTACHMENT GG Network Upgrade Charge ATTACHMENTS 32.0.0 ATTACHMENT GG NETWORK UPGRADE CHARGE 1. Network Upgrade Cost Allocation: This Attachment GG sets forth the method for calculating and collecting