NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

14.2 Attachment 1 to Attachment H (Niagara Mohawk Power Corporation) and NYPA Transmission Adjustment Charge

14.2.1 Attachment 1 to Attachment H: Schedules (Niagara Mohawk Power Corporation)

Table of Contents

Historical Transmission Revenue Requirement Schedule 1

Forecasted Transmission Revenue Requirement Schedule 2

Annual True-up with Interest Calculation Schedule 3

Year to Year Comparison Schedule 4

Allocators Schedule 5

Transmission Investment Base (Part 1 of 2) Schedule 6 Page 1 of 2

Transmission Investment Base (Part 1 of 2) Schedule 6 Page 2 of 2

Transmission Investment Base (Part 2 of 2) Schedule 7

Capital Structure Schedule 8

Expenses Schedule 9

Other Schedule 10

System Dispatch Expense - Component CCC Schedule 11

Billing Units - Component BU Schedule 12

Forecasted Accumulated Deferred Income Taxes (FADIT) Schedule 13

Actual Accumulated Deferred Income Taxes (AADIT) Schedule 13a

(Excess)/Deficient ADIT Worksheet Schedule 14

(Excess)/Deficient ADIT Remeasurement Support Schedule 14a

Smart Path Connect Project Specific Revenue Requirement Schedule 15a

Project Return Schedule 15b

Project Specific (Excess)/Deficient ADIT Worksheet Schedule 15c

Project Specific (Excess)/Deficient ADIT Remeasurement Worksheet Schedule 15d

Smart Path Connect Cost Containment Adjustment Schedule 15e

NMPC Phase 2 Project Specific Revenue Requirement Schedule 16a

Project Specific Return Calculation Schedule 16b

Project Specific (Excess)/Deficient ADIT Worksheet Schedule 16c

Project Specific (Excess)/Deficient ADIT Remeasurement Worksheet Schedule 16d

Project Specific Cost Allocation Calculation Schedule 16e

Project Specific Revenue Requirement Calculation By Project Schedule 16f

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation

Attachment 1

Calculation of RR Pursuant to Attachment H, Section 14.1.9.2

Year

Schedule 1

Calculation of RR

14.1.9.2

The RR component shall equal the (a) Historical Transmission Revenue Requirement plus (b) the Forecasted Transmission Revenue Requirement plus (c) the Annual True-Up, determined in accordance with the formula below.

Historical Transmission Revenue Requirement (Historical TRR)

Line No.

Historical Transmission Revenue Requirement (Historical TRR)

14.1.9.2 (a)

Historical TRR shall equal the sum of NMPC’s (A) Return and Associated Income Taxes, (B) Transmission Related Depreciation Expense, (C) Transmission Related

Real Estate Tax Expense, (D) Transmission Related Amortization of Investment Tax Credits, (E) Transmission Operation and Maintenance Expense,

(F) Transmission Related Administrative and General Expenses, (G) Transmission Related Payroll Tax Expense, (H) Amortization of Transmission Regulatory Assets

and Liabilities, (I) Billing Adjustments, and (J) Transmission Related Bad Debt Expense less (K) Revenue Credits, (L) Transmission Rents,

and (M) Project Specific Revenue Requirement Credits, all determined for the most recently ended calendar year as of the beginning of the update year.

Reference

Section:

Return and Associated Income Taxes

(A)

#DIV/0!

Schedule 8, Line 64

Transmission-Related Depreciation Expense

(B)

#DIV/0!

Schedule 9, Line 6, column 5

Transmission-Related Real Estate Taxes

(C)

#DIV/0!

Schedule 9, Line 12, column 5

Transmission - Related Investment Tax Credit

(D)

#DIV/0!

Schedule 9, Line 16, column 5 times minus 1

Transmission Operation & Maintenance Expense

(E)

Schedule 9, Line 23, column 5

Transmission Related Administrative & General Expense

(F)

#DIV/0!

Schedule 9, Line 38, column 5

Transmission Related Payroll Tax Expense

(G)

Schedule 9, Line 44, column 5

Amortization of Transmission Regulatory Assets and Liabilities

(H)

#DIV/0!

Schedule 9, Line 46, column 5

Sub-Total (sum of Lines 10 - Line 17)

#DIV/0!

Billing Adjustments

(I)

Schedule 10, Line 1

Bad Debt Expenses

(J)

Schedule 10, Line 4

Revenue Credits

(K)

Schedule 10, Line 7

Transmission Rents

(L)

Schedule 10, Line 15

Project Specific Revenue Requirement Credits

(M)

#DIV/0!

Schedule 10, Line 22

Total Historical Transmission Revenue Requirement (Sum of Line 18 through Line 24)

#DIV/0!

Niagara Mohawk Power Corporation						Attachment 1
Forecasted Transmission Revenue Requirement						Schedule 2
	Attachment H, Section 14.1.9.2
				Year
	Shading denotes an input
Line No.
1	14.1.9.2 (b)	FORECASTED TRANSMISSION REVENUE REQUIREMENTS
2		Forecasted TRR shall equal (1) the Forecasted Transmission Plant Additions (FTPA) multiplied by the Adjusted Annual (AFTRRF), plus (2) Forecasted ADIT Adjustment (FADITA), plus (3) the Mid-Year Trend
3		Adjustment (MYTA), less (4) Transmission Support Payments (TSP), plus (5) the Tax Rate Adjustment (TRA), less (6) Other Billing Adjustments (OBA) as shown in the following formula:
4
5		Forecasted TRR = (FTPA * AFTRRF) + FADITA + MYTA - TSP + TRA - OBA
6
7			Period	Reference		Source
8
9
10	(1)	FORECASTED TRANSMISSION PLANT ADDITIONS (FTPA)			$0	Workpaper 8, Section I, Line 16
11		Adjusted Annual Transmission Revenue Requirement Factor (AFTRRF)			#DIV/0!	Line 76
12		Sub-Total (Lines 10*11)			#DIV/0!
13
14	(2)	FORECASTED ADIT ADJUSTMENT (FADITA)
15		The Forecasted ADIT Adjustment (FADITA) shall equal the Forecasted ADIT (FADIT)
16		multiplied by the Cost of Capital Rate, where:
17
18		Forecasted ADIT(FADIT) shall equal the projected change in Accumulated Deferred Income Taxes from the most recently
19		concluded calendar year related to accelerated depreciation and associated with Transmission Plant for the
20		Forecasted Period calculated in accordance with Treasury regulation Section 1.167(1)-1(h)(6).
21
22		Forecasted ADIT (FADIT)			#DIV/0!	Schedule 13, Line 24
23		Cost of Capital Rate			#DIV/0!	Schedule 8, Line 62
24		Forecasted ADIT Adjustment (FADITA)			#DIV/0!	Line 22 * Line 23
25
26	(3)	MID YEAR TREND ADJUSTMENT (MYTA)
27		The Mid-Year Trend Adjustment shall be the difference, whether positive or negative, between
28		(i) the Historical TRR Component (E) excluding Transmission Support Payments, based on actual data for the first three months of the Forecast Period,
29		and (ii) the Historical TRR Component (E) excluding Transmission Support Payments, based on data for the first three months of the year prior to the Forecast Period.
30
31		Plus Mid-Year Trend Adjustment (MYTA)			$0	Workpaper 9, line 32, variance column
32
33	(4)	TRANSMISSION SUPPORT PAYMENTS (TSP)
34		Less Impact of Transmission Support Payments on Historical Transmission Revenue Requirement			$0	Workpaper 9A
35		Less: Other Billing Adjustments - Dunkirk Settlement ER14-543-000			$0	Schedule 10
36
37	(5)	TAX RATE ADJUSTMENT (TRA)
38		The Tax Rate Adjustment shall be the amount, if any, required to adjust Historical TRR Component (A) for any change in the Federal Income Tax Rate
39		and/or the State Income Tax Rate that takes effect during the first five months of the Forecast Period.
40
41		Tax Rate Adjustment (TRA)			$0
42
43	(6)	OTHER BILLING ADJUSTMENTS (OBA)
44		Other Billing Adjustments shall equal any amounts related to the HTRR calculation that are
45		required to be adjusted in the current year's FTRR to remove the impact on the Update Year
46
47		Other Billing Adjustments (OBA)			$0	Schedule 10, Line 1
48
49		Forecasted Transmission Revenue Requirement (Line 12 + Line 24 + Line 31 – Line 34 – Line 35 + Line 41-Line 47)			#DIV/0!
50
51	14.1.9.2(c)	ANNUAL FORECAST TRANSMISSION REVENUE REQUIREMENT FACTOR
52
53		Adjusted Annual Forecast Transmission Revenue Requirement Factor (AFTRRF) shall equal the difference between the Annual Forecast
54		Transmission Revenue Requirement Factor (FTRRF) and the quotient of (1) Cost of Capital Rate multiplied by the Transmission Related
55		Accumulated Deferred Taxes less Accumulated Deferred Inv. Tax Cr (255) for the most recently concluded calendar year,
56		and (ii) the year-end Transmission Plant in Service determined in accordance with Section 14.1.9.2 (a), component (A)1(a).
57
58		The Annual Forecast Transmission Revenue Requirement Factor (Annual FTRRF) shall equal the sum of Historical TRR components (A) through (C),
59		divided by the year-end balance of Transmission Plant in Service determined in accordance with Section 14.1.9.2 (a), component (A)1(a).
60
61		Derivation of Annual Forecast Transmission Revenue Requirement Factor (FTRRF)
62		Investment Return and Income Taxes		(A)	#DIV/0!	Schedule 1, Line 10
63		Depreciation Expense		(B)	#DIV/0!	Schedule 1, Line 11
64		Property Tax Expense		(C)	#DIV/0!	Schedule 1, Line 12
65		Total Expenses (Lines 62 thru 64)			#DIV/0!
66		Transmission Plant		(a)	#DIV/0!	Schedule 6, Page 1, Line 12
67		Annual Forecast Transmission Revenue Requirement Factor (Lines 65/ Line 66)			#DIV/0!
68
69		Adjustment to FTRRF to reflect removal of ADIT that is subject to normalization
70		Transmission Related ADIT Balance at year-end			#DIV/0!	Schedule 7, Line 2

					!
71		Cost of Capital Rate			#DIV/0!	Schedule 8, Line 62
72		Total Return and Income Taxes Associated with ADIT Balance at year-end			#DIV/0!	Line 70 * Line 71
73
74		Annual Forecast Transmission Revenue Requirement Factor (FTRRF)			#DIV/0!	Line 67
75		Less: Incremental Annual Forecast Transmission Revenue Requirement Factor Adjustment for ADIT			#DIV/0!	Line 72/ Line 66
76		Adjusted Annual Forecast Transmission Revenue Requirement Factor (AFTRRF)			#DIV/0!	Line 74 - Line 75

Niagara Mohawk Power Corporation				Attachment 1
Annual True-up (ATU)				Schedule 3
	Attachment H Section 14.1.9.2 (c)
Line No.			Year	Source:
1
2	14.1.9.2(d)	The Annual True-Up (ATU) shall equal (1) the difference between the Actual Transmission Revenue Requirement and the Prior Year
3		Transmission Revenue Requirement, plus (2) the difference between the Actual Scheduling, System Control and Dispatch costs
4		and Prior Year Scheduling, System Control and Dispatch costs, plus (3) the difference between the Prior Year Billing Units and the Actual Year
5		Billing Units multiplied by the Prior Year Unit Rate, plus (4) Interest on the net differences.
6
7	(1)	Revenue Requirement (RR) of rate effective July 1 of prior year	$0	Schedule 4, Line 1, Col (d)
8		Less: Annual True-up (ATU) from rate effective July 1 of prior year	$0	Schedule 4, Line 1, Col (c)
9		Prior Year Transmission Revenue Requirement	$0	Line 7 - Line 8
10
11		Actual Transmission Revenue Requirement	#DIV/0!	Schedule 4, Line 2, Col (a)
12		Difference	#DIV/0!	Line 11 - Line 9
13
14	(2)	Prior Year Scheduling, System Control and Dispatch costs (CCC)	$0	Schedule 4, Line 1, Col (e)
15		Actual Scheduling, System Control and Dispatch costs (CCC)	$0	Schedule 4, Line 2, Col (e)
16		Difference	$0	Line 15 - Line 14
17
18	(3)	Prior Year Billing Units (MWH)	$0	Schedule 4, Line 1, Col (f)
19		Actual Billing Units	-	Schedule 4, Line 2, Col (f)
20		Difference	-	Line 18 - Line 19
21		Prior Year Indicative Rate	#DIV/0!	Schedule 4, Line 1, Col (g)
22		Billing Unit True-Up	#DIV/0!	Line 20 * Line 21
23
24		Total Annual True-Up before Interest	#DIV/0!	(Line 12 + Line 16 + Line 22)
25
26	(4)	Interest	#DIV/0!	Line 57, Column 9
27
28		Annual True-up RR Component	#DIV/0!	(Line 24 + Line 26)
29

30	Interest Calculation per 18 CFR § 35.19a
31	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)
32	Quarters	Annual	Accrued Prin	Monthly	Days			Accrued Prin	Accrued
33		Interest	& Int. @ Beg	(Over)/Under	in	Period		& Int. @ End	Int. @ End
34		Rate (a)	Of Period	Recovery	Period (b)	Days	Multiplier	Of Period	Of Period
35
36	3rd QTR		0		92	92	1.0000	$0	$0
37	July	0.00%		#DIV/0!	31	92	1.0000	#DIV/0!	#DIV/0!
38	August	0.00%		#DIV/0!	31	61	1.0000	#DIV/0!	#DIV/0!
39	September	0.00%		#DIV/0!	30	30	1.0000	#DIV/0!	#DIV/0!
40
41	4th QTR		#DIV/0!		92	92	1.0000	#DIV/0!	#DIV/0!
42	October	0.00%		#DIV/0!	31	92	1.0000	#DIV/0!	#DIV/0!
43	November	0.00%		#DIV/0!	30	61	1.0000	#DIV/0!	#DIV/0!
44	December	0.00%		#DIV/0!	31	31	1.0000	#DIV/0!	#DIV/0!
45
46	1st QTR		#DIV/0!		91	91	1.0000	#DIV/0!	#DIV/0!
47	January	0.00%		#DIV/0!	31	91	1.0000	#DIV/0!	#DIV/0!
48	February	0.00%		#DIV/0!	28	60	1.0000	#DIV/0!	#DIV/0!
49	March	0.00%		#DIV/0!	31	31	1.0000	#DIV/0!	#DIV/0!
50
51	2nd QTR		#DIV/0!		91	91	1.0000	#DIV/0!	#DIV/0!
52	April	0.00%		#DIV/0!	30	91	1.0000	#DIV/0!	#DIV/0!
53	May	0.00%		#DIV/0!	31	61	1.0000	#DIV/0!	#DIV/0!
54	June	0.00%		#DIV/0!	30	30	1.0000	#DIV/0!	#DIV/0!
55
56
57	Total (over)/under Recovery			#DIV/0!	(line 24)	#DIV/0!			#DIV/0!

	(a) Interest rates shall be the interest rates as reported on the FERC Website http://www.ferc.gov/legal/acct-matts/interest-rates.asp
	(b) For leap years use 29 days in the month of February

Attachment 1

Schedule 4

Niagara Mohawk Power Corporation

Wholesale TSC Calculation Information

(a)

(b)

(c)

(d)

(e)

(f)

(g)

Line No.

Historical Transmission Revenue Requirement (Historical TRR)

Forecasted Transmission Revenue Requirement

Annual True Up

Revenue Requirement (RR)

Scheduling System Control and Dispatch Costs (CCC)

Annual Billing Units (BU) MWh

Rate $/MWh (*)

Prior Year Rates Effective ________

#DIV/0!

Current Year Rates Effective July 1, _______

#DIV/0!

Increase/(Decrease)

#DIV/0!

Percentage Increase/(Decrease)

#DIV/0!

1.)

Information directly from Niagara Mohawk Prior Year Informational Filing

2.)

(a)

Schedule 1, Line 26

(b)

Schedule 2, Line 49

(c)

Schedule 3, Line 28

(d)

Attachment H, Section 14.1.9.2 The RR Component shall equal Col (a) Historical Transmission Revenue Requirement plus Col (b) the Forecasted Transmission Revenue Requirement which shall exclude Transmission Support Payments, plus Col (c) the Annual True-Up plus Col (c) the Annual True-Up

(e)

Schedule 11, Line 21 - Annual Scheduling, System Control and Dispatch Costs. (i.e. the Transmission Component of control center costs) as recorded in FERC Account 561 and its associated sub-accounts from the prior calendar year excluding any NY Independent System Operator (NYISO) system control and load dispatch expenses already recovered under Schedule 1 of the NYISO Tariff.

(f)

Schedule 12, line 17 - Billing Units shall be the total Niagara Mohawk load as reported to the NYISO for the calendar year prior to the Forecast Period, including the load for customers taking service under Niagara Mohawk's TSC rate. The total Niagara Mohawk load will be adjusted to exclude (i) load associated with wholesale transactions being revenue credited through the WR, CRR, SR, ECR, and Reserved components of Attachment H of the NYISO TSC rate including Niagara Mohawk's external sales, load associated with grandfathered OATT agreements, and any load related to pre-OATT grandfathered agreements; (ii) load associated with transactions being revenue credited under Historical TRR Component J; and (iii) load associated with netted station service.

(g)

(Col (d) + Col (e)) / Col (f)

(*)

The rate column represents the unit rate prior to adjustments; the actual rate will be determined pursuant to the applicable TSC formula rate.

Niagara Mohawk Power Corporation						Attachment 1
Allocation Factors - As calculated pursuant to Section 14.1.9.1						Schedule 5

			Year
		Shading denotes an input

Line
No.

		Description		Amount	Source	Definition

1	14.1.9.1 1.	Electric Wages and Salaries Factor		83.5000%		Fixed per settlement Docket ER08-552
2
3	14.1.9.1 3.	Transmission Wages and Salaries Allocation Factor		13.0000%		Fixed per settlement Docket ER08-552
4
5
6
7
8	14.1.9.1 2.	Gross Transmission Plant Allocation Factor
9		Transmission Plant in Service		#DIV/0!	Schedule 6, Page 2, Line 3, Col 5	Gross Transmission Plant Allocation Factor shall equal the total investment in
10		Plus: Transmission Related General		$0	Schedule 6, Page 2, Line 5, Col 5	Transmission Plant in Service, Transmission Related Electric General Plant,
11		Plus: Transmission Related Common		$0	Schedule 6, Page 2, Line 10, Col 5	Transmission Related Common Plant and Transmission Related Intangible Plant
12		Plus: Transmission Related Intangible Plant		$0	Schedule 6, Page 2, Line 15, Col 5	divided by Gross Electric Plant.
13		Gross Transmission Investment		#DIV/0!	Sum of Lines 9 - 13
14
15		Total Electric Plant			FF1 204-207.104g , less FF1 Page 204-207 15g,24g,34g,44g,57g,74g,83g,98g
16		Plus: Electric Common		$0	Schedule 6, Page 2, Line 10, Col 3
17		Gross Electric Plant in Service		$0	Line 15 + Line 16
18
19		Percent Allocation		#DIV/0!	Line 13 / Line 17
20
21	14.1.9.1 4.	Gross Electric Plant Allocation Factor
22
23		Total Electric Plant in Service		$0	Line 15	Gross Electric Plant Allocation Factor shall equal
24		Plus: Electric Common Plant		$0	Schedule 6, Page 2, Line 10, Col 3	Gross Electric Plant divided by the sum of Total Gas Plant,
25		Gross Electric Plant in Service		$0	Line 23 + Line 24	Total Electric Plant, and Total Common Plant
26
27		Total Gas Plant in Service			FF1 200-201.8d, minus 4d
28		Total Electric Plant in Service		$0	Line 15
29		Total Common Plant in Service		$0	Schedule 6, Page 2, Line 10, Col 1
30		Gross Plant in Service (Gas & Electric)		-	Sum of Lines 27-Lines 29
31
32		Percent Allocation		#DIV/0!	Line 25 / Line 30

Niagara Mohawk Power Corporation

Attachment 1

Schedule 6

Page 1 of 2

Annual Revenue Requirements of Transmission Facilities

Transmission Investment Base (Part 1 of 2)

Attachment H, section 14.1.9.2

Line No.

14.1.9.2 (a)

Transmission Investment Base

A.1.

Transmission Investment Base shall be defined as (a) Transmission Plant in Service, plus (b) Transmission Related Electric General Plant, plus

(c) Transmission Related Common Plant, plus (d) Transmission Related Intangible Plant, plus (e) Transmission Related Plant Held for Future Use, less

(f) Transmission Related Depreciation Reserve, less (g) Transmission Related Accumulated Deferred Taxes, plus (h)

Transmission Regulatory Assets and Liabilities, plus (i) Transmission Related Prepayments, plus (j) Transmission Related Materials and Supplies,

plus (k) Transmission Related Cash Working Capital.

Description

Reference

Year

Reference

Section:

Transmission Plant in Service

(a)

#DIV/0!

Schedule 6, page 2, line 3, column 5

General Plant

(b)

Schedule 6, page 2, line 5, column 5

Common Plant

(c)

Schedule 6, page 2, line 10, column 5

Intangible Plant

(d)

Schedule 6, page 2, line 15, column 5

Plant Held For Future Use

(e)

Schedule 6, page 2, line 19, column 5

Total Plant (Sum of Line 12 - Line 16)

#DIV/0!

Accumulated Depreciation

(f)

#DIV/0!

Schedule 6, page 2, line 29, column 5

Accumulated Deferred Income Taxes

(g)

#DIV/0!

Schedule 7, line 6, column 5

Transmission Regulatory Assets and Liabilities

(h)

#DIV/0!

Schedule 7, line 11, column 5

Net Investment (Sum of Line 17 -Line 21)

#DIV/0!

Prepayments

(i)

#DIV/0!

Schedule 7, line 15, column 5

Materials & Supplies

(j)

#DIV/0!

Schedule 7, line 21, column 5

Cash Working Capital

(k)

Schedule 7, line 28, column 5

Total Investment Base (Sum of Line 22 - Line 26)

#DIV/0!

Niagara Mohawk Power Corporation

Attachment 1

Annual Revenue Requirements of Transmission Facilities

Schedule 6

Transmission Investment Base (Part 1 of 2)

Page 2 of 2

Attachment H Section 14.1. 9.2 (a) A. 1.

Year

Shading denotes an input

(2)

(3) = (1)*(2)

(4)

(5) = (3)*(4)

Line

(1)

Allocation

Electric

Allocation

Transmission

FERC Form 1/PSC Report

No.

Total

Factor

Allocated

Factor

Allocated

Reference for col (1)

Definition

Transmission Plant

FF1 204-207.58g, less

Page 204-

207.57g

14.1.9.2(a)A.1.(a)

Transmission Plant in Service shall equal the

Wholesale Meter Plant

#DIV/0!

Workpaper 1

balance of total investment in Transmission Plant

Total Transmission Plant in Service (Line 1+ Line 2)

#DIV/0!

plus Wholesale Metering Investment.

General Plant

100.00%

13.00%

(c)

FF1 204-207.99g, less

Page 204-

207.98g

14.1.9.2(a)A.1.(b)

Transmission Related Electric General Plant shall

equal the balance of investment in Electric General

Plant multiplied by the Transmission Wages and

Salaries Allocation Factor.

Common Plant

83.50%

(a)

13.00%

(c)

FF1 200-201. 8h

14.1.9.2(a)A.1.(c)

Transmission Related Common Plant shall equal Common

Plant multiplied by the Electric Wages and Salaries

Allocation Factor and further multiplied by the

Transmission Wages and Salaries Allocation Factor.

Intangible Plant

100.00%

13.00%

(c)

FF1 204-207.5g

14.1.9.2(a)A.1.(d)

Transmission Related Intangible Plant shall equal Intangible

Electric Plant multiplied by the Transmission Wages and

Salaries Allocation Factor.

Transmission Plant Held for Future Use

Workpaper 10

14.1.9.2(a)A.1.(e)

Transmission Related Plant Held for Future Use shall equal

the balance in Plant Held for Future Use associated with

property planned to be used for transmission service within

Transmission Accumulated Depreciation

five years.

Accumulated Depreciation related to

ARO (enter debit)

Workpaper _

Transmission Accum. Depreciation

FF1 219.25b

14.1.9.2(a)A.1.(f)

Transmission Related Depreciation Reserve shall equal the

General Plant Accum.Depreciation

100.00%

13.00%

(c)

FF1 219.28b

balance of: (i) Transmission Depreciation Reserve, plus (ii)

Common Plant Accum Depreciation

83.50%

(a)

13.00%

(c)

FF1 200-201.22h

the product of Electric General Plant Depreciation Reserve

Amortization of Other Utility Plant

100.00%

13.00%

(c)

FF1 200-201.21c

multiplied by the Transmission Wages and Salaries

Wholesale Meters

#DIV/0!

Workpaper 1

Allocation Factor, plus (iii) the product of Common Plant

Total Depreciation (Sum of Line 23 - Line 28)

#DIV/0!

Depreciation Reserve multiplied by the Electric Wages and

Salaries Allocation Factor and further multiplied by the

Transmission Wages and Salaries Allocation Factor plus (iv)

the product of Intangible Electric Plant Depreciation Reserve

multiplied by the Transmission Wages and Salaries

Allocation Factor plus (v) depreciation reserve associated with

the Wholesale Metering Investment.

Allocation Factor Reference

(a) Schedule 5, line 1

(b) Schedule 5, line 32 - not used on this Schedule

(d) Schedule 5, line 19 - not used on this Schedule

Niagara Mohawk Power Corporation

Attachment 1

Annual Revenue Requirements of Transmission Facilities

Schedule 7

Transmission Investment Base ( Part 2 of 2)

Attachment H Section 14.1.9.2 (a) A. 1.

Shading denotes an input

Year

Line No.

(1)

Total

(2)

Allocation Factor

(3) = (1)*(2)

Electric Allocated

(4)

Allocation Factor

(5) = (3)*(4)

Transmission Allocated

FERC Form 1/PSC Report

Reference for col (1)

Definition

Transmission Accumulated Deferred Taxes

Accumulated Deferred Taxes (281)

Accumulated Deferred Taxes (282)

100.00%

#DIV/0! (d

#DIV/0! (d)

#DIV/0!

FF1 272-273 Line 2k

Schedule 13(a) AADIT, Line 3

14.1.9.2(a)A.1.(g)

Transmission Related Accumulated Deferred Income Taxes

Accumulated Deferred Taxes (283)

100.00%

#DIV/0! (d)

#DIV/0!

Workpaper 2, Line 5

shall equal the electric balance of Total Accumulated Deferred

Accumulated Deferred Taxes (190)

100.00%

#DIV/0! (d)

#DIV/0!

FF1 234.8c

Income Taxes (FERC Accounts 190, 55,281, 282, and 283 net of

Accumulated Deferred Inv. Tax Cr (255)

100.00%

#DIV/0! (d)

#DIV/0!

FF1 266-267.8h

stranded costs), multiplied by the Gross Transmission Plant

Total (Sum of Line 2 - Line 5)

#DIV/0!

Allocation Factor.

Transmission Regulatory Assets and Liabilities

Excess AFUDC

100.00%

#DIV/0! (d)

#DIV/0!

FF1 232 lines_ f

14.1.9.2(a)A.1.(h)

Transmission Related Regulatory Assets and Liabilities shall equal: (i) the balance of Regulatory Assets net of Regulatory Liabilities assigned to Transmission plus (ii) the electric balance of Regulatory Assets net of Regulatory Liabilities multiplied by the Gross Transmission Plant Allocation Factor.

FAS 109

100.00%

#DIV/0! (d)

#DIV/0!

Schedule 14, line 3a, column Q

Excess (Deficient) ADIT – Tax Rate Changes

100.00%

Schedule 14, line 2, column Q

Total (Line 8 + Line 9 + Line 10)

#DIV/0!

Transmission Prepayments

FF1 110-111.57c

14.1.9.2(a)A.1.(i)

Transmission Related Prepayments shall be the product of

Less: Prepaid State and Federal Income Tax

FF1 262-263 _ k

Prepayments excluding Federal and State taxes multiplied by

Total Prepayments (Line 13 + Line 14)

#DIV/0! (b)

#DIV/0!

#DIV/0! (d)

#DIV/0!

the Gross Electric Plant Allocation Factor and further

multiplied by the Gross Transmission Plant Allocation Factor.

Transmission Material and Supplies

14.1.9.2(a)A.1.(j)

Transmission Related Materials and Supplies shall equal: (i)

Trans. Specific O&M Materials and Supplies

FF1 227.8c

the balance of Materials and Supplies assigned to

Construction Materials and Supplies

#DIV/0! (b)

#DIV/0!

#DIV/0! (d)

#DIV/0!

FF1 227.5c

Transmission plus (ii) the product of Material and Supplies

Total (Line 19 + Line 20)

#DIV/0!

assigned to Construction multiplied by the Gross Electric

Plant Allocation Factor and further multiplied by Gross

Transmission Plant Allocation Factor.

Cash Working Capital

14.1.9.2(a)A.1.(k)

Transmission Related Cash Working Capital shall be an

Operation & Maintenance Expense

Schedule 9, Line 23

allowance equal to the product of: (i) 12.5% (45 days/ 360 days = 12.5%)

0.1250

x 45 / 360

multiplied by (ii) Transmission Operation and Maintenance Expense.

Total (Line 26 * Line 27)

Allocation Factor Reference

(a) Schedule 5, line 1 - not used on this Schedule

(b) Schedule 5, line 32

(d) Schedule 5, line 19

Niagara Mohawk Power Corporation	Attachment 1
Annual Revenue Requirements of Transmission Facilities	Schedule 8
Cost of Capital Rate


	Shading denotes an input	Year

Line No.
1	The Cost of Capital Rate shall equal the proposed Weighted Costs of Capital plus Federal Income Taxes and State Income Taxes.
2		The Weighted Costs of Capital will be calculated for the Transmission Investment Base using NMPC’s actual capital structure and will equal the sum of (i), (ii), and (iii) below:
3
4	(i)	the long-term debt component, which equals the product of the actual weighted average embedded cost to maturity of NMPC’s long-term debt outstanding during the year and the sum of (a) the ratio of actual long-term debt to total capital at year-end; and
5		(b) the extent, if any, by which the ratio of NMPC's actual common equity to total capital at year-end exceeds fifty percent (50%). Long term debt shall be defined as the average of the beginning of the year and end of year balances of the following: long term debt less the unamortized
6		Discounts on Long-Term Debt less the unamortized Loss on Reacquired Debt plus unamortized Gain on Reacquired Debt. Cost to maturity of NMPC's long-term debt shall be defined as the cost of long term debt included in the debt discount expense and
7		any loss or gain on reacquired debt.

8	(ii)	the preferred stock component, which equals the product of the actual weighted average embedded cost to maturity of NMPC’s preferred stock then outstanding and the ratio of actual preferred stock to total capital at year-end;
9
10	(iii)	the return on equity component shall be the product of the allowed return on equity of 10.3% and the ratio of NMPC’s actual common equity to total capital at year-end, provided that such ratio
11		shall not exceed fifty percent (50%).

WEIGHTED

CAPITALIZATION

COST OF

EQUITY

CAPITALIZATION

Source:

RATIOS

CAPITAL

Source:

CAPITAL

PORTION

(i)

Long-Term Debt

Workpaper 6, Line 16b

#DIV/0!

Workpaper 6, Line 17c

#DIV/0!

(ii)

Preferred Stock

FF1 112-113.3c

#DIV/0!

Workpaper 6, Line 24d

#DIV/0!

(iii)

Common Equity

FF1 112-113.16c - FF1 112-113.3,12,15c

#DIV/0!

10.30%

#DIV/0!

Total Investment Return

#DIV/0!

22
23
24
25

26	14.1.9.2.2.(b)	Federal Income Tax shall equal	= (	A +	[	B	/	C]	X	Federal Income Tax Rate	)
27			(			1			-	Federal Income Tax Rate	)
28

29		where A is the sum of the preferred stock component and the return on equity component, each as determined in Sections (a)(ii) and for the ROE set forth in (a)(iii) above, B is the Equity AFUDC component of Depreciation Expense for
30		Transmission Plant in Service as defined at Section 14.1.9.1.16 (FF1 117.38c), and C is the Transmission Investment Base as shown at Schedule 6, Page 1 of 2, Line 28.
31

32	= (	#DIV/0!	+(	$0	) /	#DIV/0!	X		)
33	(	1					-	0	)
34

35	=	#DIV/0!
36
37

14.1.9.2.2.(c)

State Income Tax shall equal

= (

A +

[

Federal Income Tax Rate

) X

State Income Tax Rate

(

State Income Tax Rate

)

41		where A is the sum of the preferred stock component and the return on equity component as determined in (a)(ii) and (a)(iii) above , B is the Equity AFUDC component of Depreciation Expense for Transmission Plant in
42		Service as defined at Section 14.1.9.1.16 above, and C is the Transmission Investment Base as shown at Schedule 6, Page 1 of 2, Line 28.
43
44
45

= (

#DIV/0!

+ (

) /

#DIV/0!

) X

(

)

49	=	#DIV/0!
50
51
52

53	(a)+(b)+(c) Cost of Capital Rate	=	#DIV/0!
54
55
56	14.1.9.2(a) A. Return and Associated Income Taxes shall equal the product of the Transmission Investment Base and the Cost of Capital Rate
57
58
59
60	Transmission Investment Base		#DIV/0!	Schedule 6, page 1 of 2, Line 28
61
62	Cost of Capital Rate		#DIV/0!	Line 53
63
64	= Investment Return and Income Taxes		#DIV/0!	Line 60 X Line 62

Niagara Mohawk Power Corporation	Attachment 1
Annual Revenue Requirements of Transmission Facilities	Schedule 9
Transmission Expenses

Attachment H Section 14.1.9.2

Year

Shading denotes an input

Line No.

(1)

Total

(2)

Allocation Factor

(3) = (1)*(2)

Electric Allocated

(4)

Allocation Factor

(5) = (3)*(4)

Transmission Allocated

FERC Form 1/

PSC Report

Reference for col (1)

Definition

Depreciation Expense

Transmission Depreciation

FF1 336-337.7f

14.1.9.2.B.

Transmission Related Depreciation Expense shall equal the sum of:

General Depreciation

100.0000%

13.0000% (c)

FF1 336-337.10f

(i) Depreciation Expense for Transmission Plant in Service, plus (ii)

Common Depreciation

83.5000% (a)

13.0000% (c)

FF1 356

the product of Electric General Plant Depreciation Expense multiplied

Intangible Depreciation

100.0000%

13.0000% (c)

FF1 336-337.1f

by the Transmission Wages and Salaries Allocation Factor plus (iii)

Wholesale Meters

#DIV/0!

Workpaper 1

Common Plant Depreciation Expense multiplied by the Electric

Total (Line 1+2+3+4+5)

#DIV/0!

Wages and Salaries Allocation Factor, further multiplied by the

Transmission Wages and Salaries Allocation Factor plus (iv)

Intangible Electric Plant Depreciation Expense multiplied by the

Transmission Wages and Salaries Factor plus (v) depreciation

expense associated with the Wholesale Metering Investment.

Real Estate Taxes

100.0000%

#DIV/0! (d)

#DIV/0!

FF1 262-263 _ l

14.1.9.2.C.

Transmission Related Real Estate Tax Expense shall equal the

electric Real Estate Tax Expenses multiplied by the Gross

Transmission Plant Allocation Factor.

Amortization of Investment Tax Credits

#DIV/0! (b)

#DIV/0!

#DIV/0! (d)

#DIV/0!

FF1 114-117.58c

14.1.9.2.D.

Transmission Related Amortization of Investment Tax Credits shall

equal the product of Amortization of Investment Tax Credits multiplied

by the Gross Electric Plant Allocation Factor and further multiplied by

the Gross Transmission Plant Allocation Factor.

20	Transmission Operation and Maintenance
21	Operation and Maintenance								$0	FF1 320-323.112b	14.1.9.2.E.	Transmission Operation and Maintenance Expense shall equal
22	less Load Dispatching - #561								$0	FF1 320-323.85-92b		the sum of electric expenses as recorded in
23	O&M (Line 21 - Line 22)		$0						$0			FERC Account Nos. 560, 562-574.
24
25	Transmission Administrative and General											Transmission Related Administrative and General Expenses shall
26	Total Administrative and General									FF1 320-323.197b		equal the product of electric Administrative and General Expenses,
27	less Property Insurance (#924)									FF1 320-323.185b		excluding the sum of Electric Property Insurance, Electric Research and

28	less Pensions and Benefits (#926)									FF1 320-323.187b		Development Expense and Electric Environmental Remediation Expense,
29	less: Research and Development Expenses (#930)		$0							Workpaper 12		and 50% of the NYPSC Regulatory Expense
30 31	Less: 50% of NY PSC Regulatory Expense Less: 18a Charges (Temporary Assessment									50% of Workpaper 15 Workpaper 15		multiplied by the Transmission Wages and Salaries Allocation Factor,
32	less: Environmental Remediation Expense		$0							Workpaper 11		plus the sum of Electric Property Insurance multiplied by the Gross
33	Subtotal (Line 26-27-28-29-30-31-32)		$0	100.0000%		$0	13.0000% (c)		$0			Transmission Plant Allocation Factor, plus transmission-specific Electric
34	PLUS Property Insurance alloc. using Plant Allocation		$0	100.0000%		$0	#DIV/0! (d)		#DIV/0!	Line 27		Research and Development Expense, and transmission-specific
35	PLUS Pensions and Benefits	$0		100.0000%	$0			13.0000% (c)	$0	Workpaper 3		Electric Environmental Remediation Expense. In addition, Administrative
36	PLUS Transmission-related research and development		$0						$0	Workpaper 12		and General Expenses shall exclude the actual Post-Employment
37	PLUS Transmission-related Environmental Expense		$0						$0	Workpaper 11		Benefits Other than Pensions ("PBOP") included in FERC Account 926,
38	Total A&G (Line 33+34+35+36+37)		$0			$0			#DIV/0!			and shall add back in the amounts shown on Workpaper 3, page 1,
39												or other amount subsequently approved by FERC under Section 205 or 206.
40	Payroll Tax Expense										14.1.9.2.G.	Transmission Related Payroll Tax Expense shall equal the product of
41	Federal Unemployment									FF1 262-263.12I		electric Payroll Taxes multiplied by the Transmission Wages and
42	FICA									FF1 262-263.17I		Salaries Allocation Factor.
43	State Unemployment									FF1 262-263.13I


44	Total (Line 41+42+43)		$0	100.0000%		$0	13.0000% (b)		$0
45
46	Amortization of (Excess)/ Deficient ADIT		$0	100.0000%		$0	#DIV/0! (d)		#DIV/0!	Schedule 14, line 2, column J	14.1.9.2.H	Transmission related Amortization of Regulatory Assets and Liabilities shall equal the transmission-specific Amortization of Regulatory Assets and Liabilities
	Allocation Factor Reference
	(a) Schedule 5, line 1
	(b) Schedule 5, line 32
	(c) Schedule 5, line 3
	(d) Schedule 5, line 19

Niagara Mohawk Power Corporation

Attachment 1

Annual Revenue Requirements of Transmission Facilities

Schedule 10

Billing Adjustments, Revenue Credits, Rental Income

Year

Attachment H Section 14.1.9.2 (a)

Shading denotes an input

Line

No.

Description

(1)

Total

Source

Definition

Billing Adjustments

Workpaper 16

14.1.9.2.I.

Billing Adjustments shall be any adjustments made in accordance with Section 14.1.9.4.4 below.

( ) indicates a refund or a reduction to the revenue requirement on Schedule 1.

Bad Debt Expense

Workpaper 4

14.1.9.2.J.

Transmission Related Bad Debt Expense shall equal

Bad Debt Expense as reported in Account 904 related to NMPC's wholesale transmission billing.

Revenue Credits

Workpaper 5

14.1.9.2.K.

Revenue Credits shall equal all Transmission revenue recorded in FERC account 456

excluding (a) any NMPC revenues already reflected in the WR, CRR, SR, ECR and Reserved

components in Attachment H of the NYISO TSC rate; (b) any revenues associated

with expenses that have been excluded from NMPC’s revenue requirement; (c) any

revenues associated with transmission service provided under this TSC rate, for which the

load is reflected in the calculation of BU, and (d) any revenues associated with Schedule 15a and 16a transmission projects not charged under this TSC rate.

Transmission Rents

Workpaper 7

14.1.9.2.L.

Transmission Rents shall equal all Transmission-related rental income recorded in FERC

account 454.615

Smart Path Connect Project Specific Revenue Requirement Credit

#DIV/0!

Schedule 15a Line 17

14.1.9.2.M.

Project Specific Revenue Requirement Credit shall equal the Base Revenue Requirement associated with transmission projects not charged under this TSC rate.

NMPC Phase 2 Project Specific Revenue Requirement Credit

#DIV/0!

Schedule 16f Line 4 Column 16

14.1.9.2.N.

Project Specific Revenue Requirement Credit shall equal the Base Revenue Requirement associated with transmission projects not charged under this TSC rate plus the ROE adjustment using

the approved TSC ROE as calculated on Schedule 16bf.

Total Project Specific Revenue Requirement Credit

Line 18 + Line 20

14.1.9.4(d)

Any changes to the Data Inputs for an Annual Update, including but not limited to

revisions resulting from any FERC proceeding to consider the Annual Update, or

as a result of the procedures set forth herein, shall take effect as of the beginning

of the Update Year and the impact of such changes shall be incorporated into the

charges produced by the Formula Rate (with interest determined in accordance

with 18 C.F.R. § 38.19(a)) in the Annual Update for the next effective Update

Year. This mechanism shall apply in lieu of mid-Update Year adjustments and

any refunds or surcharges, except that, if an error in a Data Input is discovered

and agreed upon within the Review Period, the impact of such change shall be

incorporated prospectively into the charges produced by the Formula Rate during

the remainder of the year preceding the next effective Update Year, in which case

the impact reflected in subsequent charges shall be reduced accordingly.

The impact of an error affecting a Data Input on charges collected during the

Formula Rate during the five (5) years prior to the Update Year in which the error

was first discovered shall be corrected by incorporating the impact of the error on

the charges produced by the Formula Rate during the five-year period into the

charges produced by the Formula Rate (with interest determined in accordance

with 18 C.F.R. § 38.19(a)) in the Annual Update for the next effective Update

Year. Charges collected before the five-year period shall not be subject to correction.

(b)

List of Items excluded from the Revenue Requirement

	Niagara Mohawk Power Corporation						Attachment 1 Schedule 11 Page 1 of 1
	System, Control, and Load Dispatch Expenses (CCC)
	Attachment H, Section 14.1.9.5

			The CCC shall equal the annual Scheduling, System Control and Dispatch Costs (i.e., the transmission component of control center costs) as recorded in FERC Account 561 and its associated sub-accounts using information from the prior calendar year, excluding NYISO system control and load dispatch expense already recovered under Schedule 1 of the NYISO Tariff.
Line No.
1			Scheduling and Dispatch Expenses			Year	Source
2
3
4			Accounts	561.1	Reliability		FF1 320-323.85b
5			Accounts	561.2	Monitor and Operate Transmission System		FF1 320-323.86b
6			Accounts	561.3	Transmission Service and Schedule		FF1 320-323.87b
7			Accounts	561.4	Scheduling System Control and Dispatch		FF1 320-323.88b
8			Accounts	561.5	Reliability, Planning and Standards Development		FF1 320-323.89b
9			Accounts	561.6	Transmission Service Studies		FF1 320-323.90b
10			Accounts	561.7	Generation Interconnection Studies		FF1 320-323.91b
11			Accounts	561.8	Reliability, Planning and Standards Dev. Services		FF1 320-323.92b
12
13				Total Load Dispatch Expenses (sum of Lines 4 - 11)			Sum of Lines 4 - 11
14
15	Less Account 561 directly recovered under Schedule 1 of the NYISO Tariff
16
17		Accounts		561.4	Scheduling System Control and Dispatch		Line 7
18		Accounts		561.8	Reliability, Planning and Standards Dev. Services		Line 11
19				Total NYISO Schedule 1			Line 17 + Line 18
20
21		Total CCC Component					Line 13 - Line 19

Niagara Mohawk Power Corporation		Attachment 1 Schedule 12 Page 1 of 1
Billing Units - MWH
Attachment H, Section 14.1.9.6

	BU shall be the total Niagara Mohawk load as reported to the NYISO for the calendar billing year prior to the Forecast Period, including the load for customers taking service under Niagara Mohawk’s TSC Rate. The total Niagara Mohawk load will be adjusted to exclude (i) load associated with wholesale transactions being revenue credited through the WR, CRR, SR, ECR and Reserved components of Workpaper H of the NYISO TSC rate including Niagara Mohawk’s external sales, load associated with grandfathered OATT agreements, and any load related to pre-OATT grandfathered agreements; (ii) load associated with transactions being revenue credited under Historical TRR Component J; and (iii) load associated with netted station service.

Line No.			SOURCE
1	Subzone 1		NIMO TOL (transmission owner load)
2	Subzone 2		NIMO TOL (transmission owner load)
3	Subzone 3		NIMO TOL (transmission owner load)
4	Subzone 4		NIMO TOL (transmission owner load)
5	Subzone 29		NIMO TOL (transmission owner load)
6	Subzone 31		NIMO TOL (transmission owner load)

7	Total NIMO Load report to NYISO	0.000	Sum of Lines 1-6

8	LESS: All non-retail transactions
9	Watertown		FF1 page 328-330._.j
10	Disputed Station Service		NIMO TOL (transmission owner load)
11	Other non-retail transactions		All other non-retail transactions (Sum of 300,000 series PTID's from TOL)
12	Total Deductions	0.000	Sum of Lines 9 - 11

13	PLUS: TSC Load
14	NYMPA Muni's, Misc. Villages, Jamestown (X1)		FF1 page 328-330. _.j
15	NYPA Niagara Muni's (X2)		FF1 page 328-330. _.j
16	Total additions	0.000	Sum of Lines 14 -15

17	Total Billing Units	0.000	Line 7 - Line 12 + Line 16

Niagara Mohawk Power Corporation					Attachment 1
Forecasted Accumulated Deferred Income Taxes (FADIT)					Schedule 13
					Page 1 of 1
	Shading denotes an input

Line No.	Description		Amount
1	Electric ADIT Balance at year-end			FF1 Page 274-275.2k
2	Transmission Plant (PL) Allocator			Schedule 5, Line 19
3	Transmission Related ADIT Balance at year-end			Line 1 x Line 2
4
5	Forecasted Transmission Related ADIT balance			Internal Records
6
7	Change in ADIT			Line 5 - Line 3
8
9	Monthly Change in ADIT			Line 7 / 12 Months
10
11	(A) Month	(B) Remaining Days	(C) = (B)/ Line 17 (B) IRS Proration %	(D) = Line 9 *(C) Prorated ADIT
12	Month 1		100.00%	-
13	Month 2		100.00%	-
14	Month 3		100.00%	-
15	Month 4		100.00%	-
16	Month 5		100.00%	-
17	Month 6		100.00%	-
18	Month 7		#DIV/0! %	-
19	Month 8		#DIV/0! %	-
20	Month 9		#DIV/0! %	-
21	Month 10		#DIV/0! %	-
22	Month 11		#DIV/0! %	-
23	Month 12		#DIV/0! %	-
24	Total Prorated ADIT Change (Sum of 12 through 23)			$ -	to Schedule 2, Line 22

	(a) The balance in Line 1, Total Transmission ADIT Balance at year-end, shall equal such ADIT that is subject to the normalization rules prescribed
	by the IRS and the net of the amounts recorded in FERC Account No. 282.

Niagara Mohawk Power Corporation Attachment 1

Actual Accumulated Deferred Income Taxes (AADIT) Schedule 13(a)

Page 1 of 1

Shading denotes an input

Line (A) (B)

No. Description Amount Reference

1 2 3	Total ADIT Balance at prior year-end (Enter Credit) (b) Prorated Actual ADIT Activity Total Prorated ADIT Balance at year-end (Line 1 + Line 2)					(c)		FF1 Page 274-275.2b
1 2 3								Line 16(G)
	(C)		(D) (E)		(F) = (E) / Line 17(E)		(G) = (D) x (F)
	Month		Actual Monthly Change in ADIT Remaining Days		IRS Proration %		Prorated ADIT
4	Month 1	$		335	91.7808%	$		Internal Records
5	Month 2	$		307	84.1096%	$		Internal Records
6	Month 3	$		276	75.6164%	$		Internal Records
7	Month 4	$		246	67.3973%	$		Internal Records
8	Month 5	$		215	58.9041%	$		Internal Records
9	Month 6	$		185	50.6849%	$		Internal Records
10	Month 7	$		154	42.1918%	$		Internal Records
11	Month 8	$		123	33.6986%	$		Internal Records
12	Month 9	$		93	25.4795%	$		Internal Records
13	Month 10	$		62	16.9863%	$		Internal Records
14	Month 11	$		32	8.7671%	$		Internal Records
15	Month 12	$		1	0.2740%	$		Internal Records
16	Total Prorated Actual ADIT Activity (Sum Lines 6 thru 17)					$
17	Number of Days in the Year
17	Number of Days in the Year			365

Notes:

Enter credit balances as negatives.
The balance in Line 1, Total ADIT Balance at year-end, shall equal such ADIT that is subject to the normalization rules prescribed by the IRS.

Niagara Mohawk Power Corporation

Annual Revenue Requirements of Transmission Facilities

Attachment 1

(Excess)/Deficient ADIT Worksheet

Schedule 14

For Costs in 20__

Page 1 of 2

Input Cells are Shaded Yellow

(A)

(B)

( C)

(D) = (A) + (B) + (C)

( E)

(F)

(G)

(H)

(I)

(J)

20__ Year End Unamortized (Excess)/Deficient ADIT (e)

Amortization Periods (f)

Amortization Expense (e ) (g)

Line No.

Description

FERC Account No. (a)

Ref

Protected

Unprotected

Gross-Up (i)

12/31/20__ Balance

Protected

Unprotected

FERC Account No. (g)

Protected

Unprotected

Gross-Up (i)

Total Amortization

Transmission (EXCESS)/DEFICIENT ADIT - TAX RATE CHANGES

(b)

1 []

(c)

Total (Sum Lines1a thru 1[]) (d)

Electric FAS 109/(Excess) Deficient ADIT

FAS 109 - Electric

(j)

3[]

Total (Sum Lines 3a thru 3[]) (d)

TOTAL Electric FAS 109/(Excess) Deficient ADIT (Line 2 + Line 4)

Deficient ADIT - Regulatory Asset Account 182.3

FF 1 Page 232 b

Excess ADIT - Regulatory Liability Account 254

FF1 Page 278 b

Deficient/(Excess) Deferred Income Tax Regulatory Asset/(Liability) (Line 6 + Line 7)

Notes:

(a)

The affected ADIT accounts were remeasured by comparing ADIT on cumulative temporary differences for each item in accounts 190, 282, and 283 at the current Federal, State & Local Income Tax rate to ADIT balances at historical Federal, State & Local Income Tax rates. The difference between the two represents the excess or deficient ADIT. Refer to Schedule 14(a).

(b)

Relates to the Federal Income Tax Rate change associated with the 2017 Tax Cuts and Jobs Act.

(c)

Niagara Mohawk Power Corporation may add or remove sublines and notes explaining them without a FPA Section 205 filing.

(d)

Total equals the sum of sublines a through [], where [] is the last subline denoted by a letter.

(e)

Enter credit balances as negatives.

(f)

Deficient/(excess) ADIT balances will be amortized as follows: "Protected property-related" = ARAM, "unprotected property-related" = 31 yrs, all other unprotected deficient/(excess) ADIT balances = 10 yrs.

(g)

Deficient ADIT is amortized to Account 410.1; Excess ADIT is amortized to Account 411.1.

(h)

Other changes to (excess)/deficient ADIT due to the conclusion of IRS audits during applicable periods affected by a change in federal, state or local tax rates, the establishment of new (excess)/deficient ADIT due to future tax rate changes and classification changes between protected and unprotected categories due to the passage of time.

(i)

Tax gross up calculated using the Composite Tax Rate / (1 - Composite Tax Rate) in effect for the applicable period.

(j)

Other Electric Transmission and Distribution FAS 109 balances

(k)

Niagara Mohawk Power Company will add footnotes below to identify excess or deficient ADIT from future Federal, State and Local income tax rate changes.

(l)

[]

	Niagara Mohawk Power Corporation Annual Revenue Requirements of Transmission Facilities							Attachment 1
	(Excess)/Deficient ADIT Worksheet							Schedule 14
	For costs in 20__
								Page 2 of 2


		Input cells are Shaded Yellow
	(K)	(L)	(M)	(N) = (A) – (G) –(K)	(O) = (B) – (H) – (L)	(P)=(C)-(I)-(M)	(Q)= (N) + (O) + (P)	(R)

	Other Adjustments (e) (h)			20__ Year End Unamortized (Excess)/Deficient ADIT (e)
Line No.	Protected	Unprotected	Gross-Up(i)	Protected	Unprotected	Gross-Up (i)	12/31/20__ Balance	Reference


1a			-	-	-	-	-
1 []			-	-	-	-	-
2	-	-	-	-	-	-	-
3a
3b
3c			-		-	-	-
3d
3 []			-		-	-	-
4	-	-	-	-	-	-	-

5	-	-	-	-	-	-	-


6				FF1 Page 232 f			-
7				FF1 Page 278 f
8							-

Niagara Mohawk Power Corporation

Annual Revenue Requirements of Transmission Facilities

(Excess)/Deficient ADIT Worksheet

Schedule 14(a) - Remeasurement Support - ___________________________

For Costs in the Year of 20__

			(A)	(B) = (A)* ___%	(C) = (A)* ___%	(D) = (B) - (C)	(E)	(F) = (E)* _____%	(G) = (E)*____%	(H) = (F) - (G)	(I) = (D) + (H)	(J)	(K) = (I) - (J)
Line No.	Description	FERC Account No.	Gross Temporary Difference Fiscal Year Ended March 31, 20__ (a) (d)	ADIT @ __%	ADIT @ __%	(Excess)/ Deficient ADIT due to Rate Change	Gross Temporary Difference Fiscal Year Ended March 31, 20__ (a) (d)	ADIT @ _____% (c)	ADIT @ ____%	(Excess)/ Deficient ADIT due to Rate Change	Total (Excess)/ Deficient ADIT due to Rate Change	Adjustments Post Remeasurement (d)	20__ (Excess)/ Deficient ADIT due to Rate Change

1a				-	-	-		-	-	-	-		-
1[ ]				-	-	-		-	-	-	-		-
2	Total (Sum Lines 1a thru 1[]) (b)		-	-	-	-	-	-	-	-	-	-	-

Notes:

(a) Company records

(b) Total equals the sum of sublines a through [], where [] is the last subline denoted by a letter. Niagara Mohawk Power Company may add or remove sublines without a FPA Section 205 filing.

(c) When the effective date for an income tax rate change falls within a Company’s fiscal tax year, the income tax rate for such a year shall be the sum of the number of days in each time period times the tax rate for each a period.

Blended Rate	Days	Effective Rate	Blended Rate
			0.00%
			0.00%
			0.00%

(d) Enter credit balances as negatives.

(e) Niagara Mohawk Power Company may add footnotes below without a FPA Section 205 filing.

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation

Project Specific Revenue Requirement Calculation

Attachment 1

Schedule 15a _

Smart Path Connect

______________________ /___________________________

Page 1 of 1

Shading denotes an input

Line No.

Description

Amount

Source

Definitions

Project Gross Plant In-Service

Workpaper _

Project Gross Plant In-Service will be the total capital investment for the project included in Transmission Plant In Service plus Electric General and Electric Intangible Plant times the SPC Allocator percentage for Electric to SPC plus NMPC Common Plant times the SPC Allocator percentage for Gas+Electric to SPC.

CWIP

Workpaper _

Authorized by FERC Order ______________

Project - Related Depreciation and Amortization Reserves (Enter Credit)

Workpaper _

Project-related depreciation and amortization reserve shall equal the accumulated credit of Project - Related Depreciation Expense net of any applicable retirements, cost of removal or salvage adjustments associated with the project.

Project - Related Accumulated Deferred Income Taxes (Enter Credit)

Workpaper _

Project - Related Accumulated Deferred Income Taxes shall equal ADIT calculated based on cost, accumulated book depreciation and accumulated tax depreciation.

Project - Related (Excess) Deficient ADIT

Schedule 15c _ Line 2Q

Project - Related (Excess) Deficient ADIT shall be the unamortized excess or deficient ADIT balance related specifically to the project as per Schedule 15c.

Project - Related Prepayments

#DIV/0!

(Line 1/ Schedule 5 Line 13 ) * Schedule 7 Line 15 Column (5)

Project - Related Prepayments shall equal the ratio of Project Gross Plant In-Service to Gross Transmission Investments times Transmission Related Prepayments

Project - Related Materials & Supplies

#DIV/0!

(Line 1/ Schedule 5 Line 13 ) * Schedule 7 Line 21 Column (5)

Project - Related Materials & Supplies shall equal the ratio of Project Gross Plant In-Service to Gross Transmission Investments times Transmission Related Materials & Supplies

Project - Related Cash Working Capital

#DIV/0!

(Line 1/ Schedule 5 Line 13 ) * Schedule 7 Line 28 Column (5)

Project - Related Cash Working Capital shall equal the ratio of Project Gross Plant In-Service to Gross Transmission Investments times Transmission Related Cash Working Capital

Net Investment Base

#DIV/0!

Sum lines 1 through 8

Project Specific Investment Base excl CWIP Return and Asso. Taxes

#DIV/0!

Schedule 15b Line 24

Project - Related Depreciation Expense

Workpaper _

Project-related depreciation expense will be determined based on application of the current FERC approved depreciation accrual rates per Section 14.1.9.1.14 of Attachment H of the NYISO OATT on a utility account basis to the Project Gross Plant In-service.

Project - Related Amortization of (Excess) Deficient ADIT

Schedule 15c _ Line 2J

Project - Related Amortization of (Excess) Deficient ADIT shall be the annual amortized excess or deficient ADIT balance related specifically to the project as identified in Schedule 15c Project Specific (Excess) Deficient ADIT.

Project - Related Real Estate Taxes

Workpaper _

Project related portion of Transmission Related Real Estate Tax Expense as determined based on the taxable value of the investment and the applicable property tax rate.

Project - Related Operation & Maintenance Expense

Workpaper _

Project - Related Operation and Maintenance Expense shall be based on charges to project-specific work orders. Operation & maintenance costs that cannot be directly attributed to a project will be allocated to a project based on the ratio of the Project Gross Plant In-service to Gross Transmission Investments.

Project Allocated Administrative & General Expense

#DIV/0!

Workpaper _

Project Allocated Administrative and General Expense shall equal the sum of Electric Administrative and General Expenses, Electric Pension & OPEB Expenses, and Electric Payroll Tax Expense times the SPC Allocator percentage for Electric to SPC, plus the ratio of Project Gross Plant In-Service to Gross NMPC Transmission Investment times Transmission Related Property Insurance and Transmission Related Research & Development expenses.

Billing Adjustments

Workpaper _

Billing Adjustments shall be any adjustments made in accordance with Section 14.1.9.4.4

Base Revenue Requirement

#DIV/0!

Sum lines 10 through 16

Project Specific Investment Base CWIP Return and Asso. Taxes

#DIV/0!

Schedule 15b Line 25

Project Specific Investment Base CWIP Return and Associated Taxes shall be the Return and Associated Income Taxes related to authorized CWIP included in ratebase

Cost Containment Adjustment

Schedule 15e Line 23

Authorized by FERC Order ______________.

Billing Adjustments

Workpaper _

Billing Adjustments shall be any adjustments made in accordance with Section 14.1.9.4.4

Non-Base Revenue Requirement

#DIV/0!

Sum lines 18 through 20

Annual True-up including Interest

#DIV/0!

Line 35

Total Project Specific Revenue Requirement

#DIV/0!

Sum line 17 + 21 + 23

Annual True-up and Interest Calculation

26	ISO Revenues Received	-	WP5 Line _
27	Less: Prior Year True-up incl Interest	-	Workpaper _
28	Adjusted ISO Revenues	-	Sum Lines 26 and 27
29
30	Actual Revenue Requirement (a)	#DIV/0!	Line 17 + 21
31	(Over) Under recovery	#DIV/0!	Line 30 - Line 28
32
33	Interest	#DIV/0!	Line 64, Column (9)
34
35	Annual True-up including interest	#DIV/0!	Line 31 + Line 33
36
37	Interest Calculation per 18 CFR Section 35.19a

38	(1)	(2)	(3)		(4)	(5)	(6)	(7)		(8)	(9)
39	Quarters	Annual	Accrued Prin		Monthly	Days				Accrued Prin	Accrued
40		Interest	& Int. @ Beg		(Over)/Under	in	Period			& Int. @ End	Int. @ End
41		Rate (b)	Of Period		Recovery	Period (b)	Days	Multiplier		Of Period	Of Period
42
43	3rd QTR ‘_	0.00%	0			92	92	1.0000		$0	$0
44	July	0.00%			#DIV/0!	31	92	1.0000		#DIV/0!	#DIV/0!
45	August	0.00%			#DIV/0!	31	61	1.0000		#DIV/0!	#DIV/0!
46	September	0.00%			#DIV/0!	30	30	1.0000		#DIV/0!	#DIV/0!
47
48	4th QTR ‘_	0.00%	#DIV/0!			92	92	1.0000		#DIV/0!	#DIV/0!
49	October	0.00%			#DIV/0!	31	92	1.0000		#DIV/0!	#DIV/0!
50	November	0.00%			#DIV/0!	30	61	1.0000		#DIV/0!	#DIV/0!
51	December	0.00%			#DIV/0!	31	31	1.0000		#DIV/0!	#DIV/0!
52
53	1st QTR ‘_	0.00%	#DIV/0!			91	91	1.0000		#DIV/0!	#DIV/0!
54	January	0.00%			#DIV/0!	31	91	1.0000		#DIV/0!	#DIV/0!
55	February	0.00%			#DIV/0!	28	60	1.0000		#DIV/0!	#DIV/0!
56	March	0.00%			#DIV/0!	31	31	1.0000		#DIV/0!	#DIV/0!
57
58	2nd QTR ‘_	0.00%	#DIV/0!			91	91	1.0000		#DIV/0!	#DIV/0!
59	April	0.00%			#DIV/0!	30	91	1.0000		#DIV/0!	#DIV/0!
60	May	0.00%			#DIV/0!	31	61	1.0000		#DIV/0!	#DIV/0!
61	June	0.00%			#DIV/0!	30	30	1.0000		#DIV/0!	#DIV/0!
62
63
64	Total (Over)/Under Recovery			#DIV/0!			#DIV/0!		#DIV/0!

(a) (b)	First year revenue requirement to be prorated based on in-service date of project or FERC approval of CWIP recovery Interest rates shall be the interest rates as reported on the FERC Website http://www.ferc.gov/legal/acct-matts/interest-rates.asp
(c)	For leap years use 29 days in the month of February

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation

Project Return and Associated Income Taxes

Smart Path Connect

Attachment 1

Schedule 15b

Page 1 of 1

Shading denotes an input

Cost Of Capital

Cost of Capital rate will equal the cost of capital rate calculated using the Weighted Costs of Capital as defined in Section 14.1.9.2.2 (i), (ii) and (iii) of Attachment H of the OATT.

Line		(a) CAPITALIZATION	(b) CAPITALIZATION RATIOS	(c) COST OF CAPITAL	(d) WEIGHTED COST OF CAPITAL	(e) EQUITY PORTION	Source:
1
2	LONG TERM DEBT	$0	#DIV/0!	#DIV/0!	#DIV/0!		Schedule 8 Line 17
3	PREFERRED STOCK	$0	#DIV/0!	#DIV/0!	#DIV/0!	#DIV/0!	Schedule 8 Line 18
4	COMMON EQUITY	$0	#DIV/0!	10.30%	#DIV/0!	#DIV/0!	Schedule 8 Line 19
5
6	TOTAL INVESTMENT RETURN	$0	#DIV/0!		#DIV/0!	#DIV/0!	Line 2 + Line 3 + Line 4
7
8
9	Federal Income Tax
10	Equity WACC	#DIV/0!	Line 6(e)
11	Federal Income Tax Rate	0.00%	Schedule 8 Line 32
12	Federal Income Tax	#DIV/0!	(Line 10*Line 11)/(1-Line 11)
13
14	State Income Tax
15	State Income Tax Rate	0.00%	Schedule 8 Line 46
16	State Income Tax	#DIV/0!	(Line 10 + Line 12)*Line 15/(1- Line 15)
17
18	Cost of Capital Rate	#DIV/0!	Line 6(d) + Line 12+ Line 16


19	Project Specific Investment Base excl CWIP	#DIV/0!	Schedule 15a Line 9 - Line 2
20	Project Specific Investment Base CWIP	--	Schedule 15a Line 2
21	Total Investment Base	#DIV/0!


22
23	Return and Associated Taxes
24	Project Specific Investment Base excl CWIP Return and Asso. Taxes	#DIV/0!	Line 19 * Line 18
25	Project Specific Investment Base CWIP Return and Asso. Taxes	#DIV/0!	Line 20 * Line 18
26
27	Total Return and Associated Income Taxes	#DIV/0!	Sum Line 24 + 25

Notes: Enter credit balances as negatives.

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation

Annual Revenue Requirements of Transmission Facilities

Attachment 1

Schedule 15c

Page 1 of 2

Smart Path Connect (Excess)/Deficient ADIT Worksheet_

For Costs in 20__

Input Cells are Shaded Yellow

(A)

(B)

( C)

(D) = (A) + (B) + (C)

( E)

(F)

(G)

(H)

(I)

(J)

20__ Year End Unamortized (Excess)/Deficient ADIT (d)

Amortization Periods (e)

Amortization Expense (d ) (f)

Line No.

Description

FERC Account No. (a)

Protected

Unprotected

Gross-Up (h)

12/31/20__ Balance

Protected

Unprotected

FERC Account No. (f)

Protected

Unprotected

Gross-Up (h)

Total Amortization

Project -related (Excess)/Deficient ADIT - Tax Rate Changes

1 [ ]

(b)

Total (Sum Lines1a thru 1 [ ] ) (c)

Notes:

(a)

The affected ADIT accounts were remeasured by comparing Project Specific ADIT on cumulative temporary differences for each item in accounts 190, 282, and 283 at the current Federal, State & Local Income Tax rate to Project Specific ADIT balances at historical Federal, State & Local Income Tax rates. The difference between the two represents the excess or deficient ADIT recorded to Account 254 or Account 182.3, respectively. Amounts reflected on this schedule are a subset of total Transmission Related (Excess) Deficient ADIT shown on Schedule 14. Refer to Schedule 14 for the reconciliation of Total Transmission Related (Excess) Deficient ADIT to FF1 Page 232 for Account 182.3 and FF1 Page 278 for Account 254.

(b)

Niagara Mohawk Power Corporation may add or remove sublines and notes explaining them without a FPA Section 205 filing.

(c)

Total equals the sum of sublines a through [ ], where [ ] is the last subline denoted by a letter.

(d)

Enter credit balances as negatives.

(e)

(f)

Deficient ADIT is amortized to Account 410.1; Excess ADIT is amortized to Account 411.1.

(g)

(h)

Tax gross up calculated using the Composite Tax Rate / (1 - Composite Tax Rate) in effect for the applicable period.

(i)

Niagara Mohawk Power Company will add footnotes below to identify excess or deficient ADIT from future Federal, State and Local income tax rate changes.

(j) [ ]

	Niagara Mohawk Power Corporation Annual Revenue Requirements of Transmission Facilities							Attachment 1 Schedule 15c Page 2 of 2
	Smart Path Connect (Excess)Deficient ADIT Worksheet:_
	For costs in 20_



		Input cells are Shaded Yellow
	(K)	(L)	(M)	(N) = (A) – (G) –(K)	(O) = (B) – (H) – (L)	(P)=(C)-(I)-(M)	(Q)= (N) + (O) + (P)	(R)

	Other Adjustments (d) (g)			20__ Year End Unamortized (Excess)/Deficient ADIT (d)
Line No.	Protected	Unprotected	Gross-Up (h)	Protected	Unprotected	Gross-Up (h)	12/31/20__ Balance	Reference
1a			-	-	-	-	-	Internal Records
1 [ ]			-	-	-	-	-
2

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation

Annual Revenue Requirements of Transmission Facilities

Project Specific (Excess)/Deficient ADIT Remeasurement Worksheet: Smart Path Connect ____

Schedule 15(d) - Remeasurement Support

For Costs in the Year of 20__

			(A)	(B) = (A)* ___%	(C) = (A)* ___%	(D) = (B) - (C)	(E)	(F) = (E)* _____%	(G) = (E)*____%	(H) = (F) - (G)	(I) = (D) + (H)	(J)	(K) = (I) - (J)
Line No.	Description	FERC Account No.	Gross Temporary Difference Fiscal Year Ended March 31, 20__ (a) (d)	ADIT @ __%	ADIT @ __%	(Excess)/ Deficient ADIT due to Rate Change	Gross Temporary Difference Fiscal Year Ended March 31, 20__ (a) (d)	ADIT @ _____% (c)	ADIT @ ____%	(Excess)/ Deficient ADIT due to Rate Change	Total (Excess)/ Deficient ADIT due to Rate Change	Adjustments Post Remeasurement (d)	20__ (Excess)/ Deficient ADIT due to Rate Change

1a				-	-	-		-	-	-	-		-
1[ ]				-	-	-		-	-	-	-		-
2	Total (Sum Lines 1a thru 1 [ ] ) (b)		-	-	-	-	-	-	-	-	-	-	-

Notes:

(a) Company records

(b) Total equals the sum of sublines a through [ ], where [ ] is the last subline denoted by a letter. Niagara Mohawk Power Company may add or remove sublines without a FPA Section 205 filing.

Blended Rate	Days	Effective Rate	Blended Rate
			0.00%
			0.00%
			0.00%

(d) Enter credit balances as negatives.

(e) Niagara Mohawk Power Company may add footnotes below without a FPA Section 205 filing.

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation Attachment 1

Smart Path Connect Cost Containment Adjustment Schedule 15e

Under the cost containment mechanism for the Smart Path Connect (“SPC”) project (“SPC Project” or “Project”), where “Eligible Project Costs” exceed the “Cost Cap,” NMPC will earn no ROE on 20% of the equity portion of the actual costs that exceed the Cost Cap. NMPC will remain eligible to recover the depreciation and debt costs on its share of all actual Project-related costs.

The Cost Cap for the SPC Project is $481.8 million.

Eligible Project Costs are defined as all capital costs incurred to develop, construct, and place the SPC Project into service, excluding “Third Party Costs” and “Unforeseeable Costs” in excess of 2.5% of the Cost Cap.

Third Party Costs include: (i) interconnection and network upgrade costs resulting from the ISO evaluation process; (ii) property taxes; and (iii) any increased costs, i.e., costs incurred related to the rescheduling of outages or to the relocation of utility assets, which are beyond the ability of NMPC to control or mitigate.

Unforeseeable Costs are defined in terms of costs that NMPC could not have reasonably anticipated at the time the estimate was submitted to the NYPSC as part of the Article VII application process. Unforeseeable Costs include the following:

UC 1 - Costs associated with material modifications to the routing or scope of work of the Project that results from a NYPSC order, negotiation, or settlement agreement within the siting process, or are imposed or required by any other governmental agency. For the avoidance of doubt, foreseeable obligations, as included in NMPC’s Article VII Application to the New York Public Service Commission for the SPC Project, or non-material obligations imposed upon NMPC as a normal part of the siting process, shall not be deemed to be Unforeseeable Costs

UC 2 - Costs associated with changes in applicable laws and regulations, or interpretations thereof by governmental agencies

UC 3 - Costs incurred as a result of orders of courts or action, or inaction, by governmental agencies;

UC 4 - Costs related to destruction, damage, interruption, suspension, or interference of or with the Project caused by landslides, lightning, earthquakes, hurricanes, tornadoes, severe weather, fires, explosions, floods, epidemics, pandemics, acts of public enemy, acts of terrorism, wars, blockades, riots, rebellions, sabotage, insurrections, environmental contamination or damage, or strike or otherwise unavailability of skilled labor, provided that (i) the cause was not reasonably within the control of NMPC, (ii) NMPC made reasonable efforts to avoid or minimize the adverse impacts of any of the above-listed events, and (iii) NMPC took reasonable steps to expeditiously resolve the event after it occurred;

UC 5 - Steel cost escalation that is greater than the “Handy Whitman Construction Cost Index” applied to steel costs in determining the Cost Cap; and

UC 6 - Total actual Project cost escalation, excluding steel costs, that are greater than 150% of the Handy Whitman Construction Cost Index applied to non-steel costs in determining the Cost Cap.

Line No.		Amount	Source	Definitions
1	Cost Cap	481,800,000		As defined in Docket _____________

	Eligible Project Costs
2	Total Capital Costs	-	Schedule 15a Line 1
3	Less: Third Party Costs (enter credit)
4	Interconnection and network upgrade costs resulting from the ISO evaluation process		Internal Records
5	Property taxes		Internal Records
6	Any increased costs, i.e., costs incurred related to the rescheduling of outages or to the relocation of utility assets, which are beyond the ability of NMPC to control or mitigate		Internal Records
7	Total Third Party Costs	-	Sum lines 4 to 6
8	Less: Unforeseeable Costs (enter credit)			Only Unforeseeable Costs that exceed 2.5% of the Cost Cap will be excluded from Eligible Project Costs, exempted from application of the Cost Cap, and recovered under the SPC-FC.
9	UC 1		Internal Records
10	UC 2		Internal Records
11	UC 3		Internal Records
12	UC 4		Internal Records
13	UC 5		Internal Records
14	UC 6		Internal Records
15	Total Unforeseeable Costs	-	Sum lines 9 to 14

16	Total Eligible Project Costs	-	Line 2 + Line 7 + Line 15

17	Amount in excess (below) Cost Cap		Line 16 less Line 1

18	% eligible for ROE reduction	20%		As defined in Docket _____________

19	Equity Return Portion		Schedule 15b Line 6 (e)
20	FIT		Schedule 15b Line 12 (a)
21	SIT		Schedule 15b Line 16 (a)
22	Total Base Cost of Capital Adjustment		Sum lines 19 to Line 21

23	Cost Containment Adjustment		If line 17 > 0 then -line 17* line 18* line 22

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation										Attachment 1
NMPC Phase 2 Revenue Requirement Summary										Schedule 16a
										Page 1 of 1


	Shading denotes an input

Line No.	Description	Amount		Source
1	Project Gross Plant In-Service	-		Schedule 16e Line 6 Column 5
2	Project - Related Depreciation and Amortization Reserves (Enter Credit)	-		Schedule 16e Line 13 Column 5
3	Project - Related Accumulated Deferred Income Taxes (Enter Credit) (d)	-		Workpaper _
4	Project - Related (Excess) Deficient ADIT (e)	-		Schedule 16c Line 2Q
5	Project - Allocated Prepayments	-		Schedule 16e Line 23 Column 5
6	Project - Allocated Materials & Supplies	-		Schedule 16e Line 26 Column 5
7	Project - Allocated Cash Working Capital	-		Schedule 16e Line 29 Column 5
8	Net Investment Base	-		Sum lines 1 through 7

9	Project Specific Investment Base Return and Asso. Taxes	-		Schedule 16f Line 4 column (3)
10	Project - Related Depreciation Expense	-		Schedule 16f Line 4 column (4) + (6) + (7) + (8)
11	Project - Related Amortization of (Excess) Deficient ADIT (f)	-		Schedule 16c Line 2J
12	Project - Allocated Real Estate Taxes	-		Schedule 16f Line 4 column (10)
13	Project - Related Operation & Maintenance Expense	-		Schedule 16f Line 4 column (5) + (11)
14	Project Allocated Administrative & General Expense	-		Schedule 16f Line 4 column (12)
15	Billing Adjustments (g)	-		Workpaper _
16	Base Revenue Requirement (a)	-		Sum line 9 through 15

17	Annual True-up including Interest	-		Line 25

18	Total Project Specific Revenue Requirement	-		Sum line 16 + 17



Annual True-up and Interest Calculation

19	Estimated Revenue Requirement	-		Prior Year Annual Update Schedule 16a, Line 16
20	Less: Prior Year True-up incl Interest	-		Prior Year Annual Update Schedule 16a, Line 17
21	Adjusted Revenues	-		Sum Lines 19 and 20

22	Actual Revenue Requirement (a)	-		Line 16
23	(Over) Under Recovery	-		Line 22 - Line 21

24	Interest	-		Line 54, Column (9)

25	Annual True-up including interest	-		Line 23 + Line 24

26	Interest Calculation per 18 CFR Section 35.19a.
27	(1)	(2)	(3)		(4)	(5)	(6)	(7)	(8)	(9)
28	Quarters	Annual	Accrued Prin		Monthly	Days			Accrued Prin	Accrued
29		Interest	& Int. @ Beg		(Over)/Under	in	Period		& Int. @ End	Int. @ End
30		Rate (b)	Of Period		Recovery	Period (c)	Days	Multiplier	Of Period	Of Period
31
32	3rd QTR	-		0		92	92	-	$0	$0
33	July	-			0	31	92	-	$0	$0
34	August	-			0	31	61	-	$0	$0
35	September	-			0	30	30	-	$0	$0
36		-
37	4th QTR	-		0		92	92	-	$0	$0
38	October	-			0	31	92	-	$0	$0
39	November	-			0	30	61	-	$0	$0
40	December	-			0	31	31	-	$0	$0
41		-
42	1st QTR	-		0		90	90	-	$0	$0
43	January	-			0	31	90	-	$0	$0
44	February	-			0	28	59	-	$0	$0
45	March	-			0	31	31	-	$0	$0
46		-
47	2nd QTR	-		0		91	91	-	$0	$0
48	April	-			0	30	91	-	$0	$0
49	May	-			0	31	61	-	$0	$0
50	June	-			0	30	30	-	$0	$0
51
52
53
54	Total (Over) Under Recovery				$0					$0

(a)	First year revenue requirement to be prorated based on project's actual in-service date.
(b)	Interest rates shall be the interest rates as reported on the FERC Website https://www.ferc.gov/interest-calculation-rates-and-methodology
(c)	For leap years use 29 days in the month of February
(d)	Project - Related Accumulated Deferred Income Taxes shall equal ADIT calculated based on cost, accumulated book depreciation, and accumulated tax depreciation.
(e)	Project - Related (Excess) Deficient ADIT shall be the unamortized excess or deficient ADIT balance related specifically to the project as per Schedule 16c.
(f)	Project - Related Amortization of (Excess) Deficient ADIT shall be the annual amortized excess or deficient ADIT balance related specifically to the project as identified in Schedule 16c Project Specific (Excess) Deficient ADIT.
(g)	Billing Adjustments shall be any adjustments made in accordance with Section 14.1.9.4.4

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation										Attachment 1
Project Specific Return Calculation										Schedule 16b
NMPC Phase 2 Eligible projects										Page 1 of 1


	Shading denotes an input

Cost of Capital at New York Public Service Commission "NYPSC"-approved Return on Equity (ROE) and Capital Structure			Cost of Capital rate will equal the cost of capital rate calculated using the New York Public Service Commission "NYPSC"-approved Return on Equity (ROE) and Capital Structure.

			(a)	(b)	(c)	(d)	(e)		(f)
				CAPITALIZATION	COST OF	WEIGHTED COST OF	EQUITY		ROE
Line			CAPITALIZATION	RATIOS	CAPITAL	CAPITAL	PORTION	Source:	RATES	Source:
1
2
3		LONG-TERM DEBT	-	-	-	-		Schedule 8 Line 17
4		PREFERRED STOCK	-	-	-	-	-	Schedule 8 Line 18
5		COMMON EQUITY	-	-	-	-	-	Schedule 8 Line 19	-	NYPSC-approved ROE, Rate Case ________
6
7		TOTAL INVESTMENT RETURN	-	-		-	-	Line 3 + Line 4 + Line 5
8
9
10		Federal Income Tax
11		Equity WACC	-	Line 7 (e)
12		Federal Income Tax Rate	-	Schedule 8 Line 32
13		Federal Income Tax	-	(Line 11*Line 12)/(1-Line 12)
14
15		State Income Tax
16		State Income Tax Rate	-	Schedule 8 Line 46
17		State Income Tax	-	(Line 11 + Line 13)*Line 16/(1- Line 16)
18
19		Cost of Capital Rate	-	Line 7 (d) + Line 13+ Line 17
20


Cost of Capital at FERC-approved TSC ROE rate			Cost of Capital rate will equal the cost of capital rate calculated using the Weighted Costs of Capital as defined in Section 14.1.9.2.2 (i), (ii) and (iii) of Attachment H of the OATT.

			(a)	(b)	(c)	(d)	(e)
				CAPITALIZATION	COST OF	WEIGHTED COST OF	EQUITY
			CAPITALIZATION	RATIOS	CAPITAL	CAPITAL	PORTION	Source:
21
22		LONG-TERM DEBT	-	-	-	-		Schedule 8 Line 17
23		PREFERRED STOCK	-	-	-	-	-	Schedule 8 Line 18
24		COMMON EQUITY	-	-	-	-	-	Schedule 8 Line 19	10.30%	Project Specific FERC-approved ROE Ceiling
25
26		TOTAL INVESTMENT RETURN	-	-		-	-	Line 22 + Line 23 + Line 24
27
28
29		Federal Income Tax
30		Equity WACC	-	Line 26 (e)
31		Federal Income Tax Rate	-	Schedule 8 Line 32
32		Federal Income Tax	-	(Line 30*Line 31)/(1-Line 31)
33
34		State Income Tax
35		State Income Tax Rate	-	Schedule 8 Line 46
36		State Income Tax	-	(Line 30 + Line 32)*Line 35/(1- Line 35)
37
38		Cost of Capital Rate	-	Line 26 (d) + Line 32+ Line 36
39

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation

Annual Revenue Requirements of Transmission Facilities

NMPC Phase 2 Eligible projects (Excess)/Deficient ADIT Worksheet

Schedule 16c

For costs in 20__

Input Cells are Shaded Yellow

(A)

(B)

(C)

(D) = (A) + (B) + (C)

(E)

(F)

(G)

(H)

(I)

(J)

(K)

(L)

(M)

(N) = (A) - (G) - (K)

(O) = (B) - (H) - (L)

(P)=(C )-(I)-(M)

(Q) = (N) + (O) + (P)

(R)

20__ Year End Unamortized (Excess)/Deficient ADIT (d )

Amortization Periods (e)

Amortization Expense (d ) (f)

Other Adjustments (d ) (g)

20__ Year End Unamortized (Excess)Deficient ADIT (d )

Line No.

Description

FERC Account No. (a)

Protected

Unprotected

Gross-Up (h)

12/31/20__ Balance

Protected

Unprotected

FERC Account No. (f)

Protected

Unprotected

Gross-Up (h)

Total Amortization

Protected

Unprotected

Gross-Up (h)

Protected

Unprotected

Gross-Up (h)

12/31/20__ Balance

Reference

Project-related (Excess)/Deficient ADIT - Tax Rate Changes

Internal Records

1[ ]

(b)

Total (Sum Lines 1a thru 1[]) (c)

Notes:

(a)

(b)

Niagara Mohawk Power Company may add or remove sublines and notes explaining them without an FPA Section 205 filing.

(c)

Total equals the sum of sublines a through [], where [] is the last subline denoted by a letter.

(d)

Enter credit balances as negatives.

(e)

(f)

Deficient ADIT is amortized to Account 410.1; Excess ADIT is amortized to Account 411.1

(g)

(h)

Tax gross up calculated using the Composite Tax Rate / (1 - Composite Tax Rate) in effect for the applicable period.

(i)

Niagara Mohawk Power Company will add footnotes below to identify excess or deficient ADIT from future Federal, State and Local income tax rate changes.

(j) []

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation

Annual Revenue Requirements of Transmission Facilities

Project Specific (Excess)/Deficient ADIT Remeasurement Worksheet: NMPC Phase 2 Eligible projects

Schedule 16d - Remeasurement Support

For Costs in the Year of 20__

(A)

(B) = (A)* ___%

(D) = (B) - (C)

(E)

(F) = (E)* _____%

(G) = (E)*____%

(H) = (F) - (G)

(I) = (D) + (H)

(J)

(K) = (I) - (J)

Line No.

Description

FERC Account No.

Gross Temporary Difference
Fiscal Year Ended March 31, 20__ (a) (d)

ADIT @ __%

(Excess)/Deficient ADIT due to Rate Change

Gross Temporary Difference
Fiscal Year Ended March 31, 20__ (a) (d)

ADIT @ _____% (c)

ADIT @ ____%

(Excess)/Deficient ADIT due to Rate Change

Total (Excess)/Deficient ADIT due to Rate Change

Adjustments Post Remeasurement (d)

20__ (Excess)/Deficient ADIT due to Rate Change

1[ ]

Total (Sum Lines 1a thru 1[]) (b)

Notes

(a)

Company records

(b)

Total equals the sum of sublines a through [], where [] is the last subline denoted by a letter. Niagara Mohawk Power Company may add or remove sublines without an FPA Section 205 filing.

(c)

When the effective date for an income tax rate change falls within a Company’s fiscal tax year, the income tax rate for such a year shall be the sum of the number of days in each time period times the tax rate for each a period.

Blended Rate

Days

Effective Rate

Blended Rate

0.00%

(d)

Enter credit balances as negatives.

(e)

Niagara Mohawk Power Company may add footnotes below without an FPA Section 205 filing.

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation									Attachment 1
Project Specific Cost Allocation Calculation									Schedule 16e
NMPC Phase 2 Eligible projects									Page 1 of 1

	Shading denotes an input
	(1)		(2)	(3)	(4)		(5)	(6)
Line No.	Description		Amount	Reference	Allocation Factor		NMPC Phase 2 projects total	Source	Definitions

1	Transmission Allocated Plant In-Service
2		Transmission - Project Specific	-	Schedule 6 page 1 Line 12	NA			Workpaper_	Project Gross Plant In-Service will be the total capital investment for the project, excluding ARO, included in Transmission Plant In Service plus the sum of transmission allocated General Plant, Common Plant and Intangible Plant, multiplied by NMPC Phase 2 Plant Allocation factor.
3		General Plant	-	Schedule 6 page 1 Line 13	0.00%	PA	$0	Column 2 * Column 4
4		Common Plant	-	Schedule 6 page 1 Line 14	0.00%	PA	$0	Column 2 * Column 4
5		Intangible Plant	-	Schedule 6 page 1 Line 15	0.00%	PA	$0	Column 2 * Column 4
6		Project Specific Gross Plant In-Service					$0	Sum of Line 2 - Line 5
7
8	Transmission Allocated Accumulated Depreciation
9		Transmission - Project Specific	-	NA	NA			Workpaper_	Project-related depreciation and amortization reserve, excluding ARO, shall equal the accumulated credit from Project - Related Depreciation Expense, determined by vintage of the assets and associated account's depreciation parameters (i.e., average service life, net salvage factor, and depreciation curve).
10		General Plant	-	Schedule 6 page 2 Line 25 Col 5	0.00%	PA	$0	Column 2 * Column 4	Project - Allocated General Plant's accumulated depreciation shall equal transmission allocated General Plant's accumulated depreciation times NMPC Phase 2 Plant Allocation Factor.
11		Common Plant	-	Schedule 6 page 2 Line 26 Col 5	0.00%	PA	$0	Column 2 * Column 4	Project - Allocated Common Plant's accumulated depreciation shall equal transmission allocated Common Plant's accumulated depreciation times NMPC Phase 2 Plant Allocation Factor.
12		Intangible Plant	-	Schedule 6 page 2 Line 27 Col 5	0.00%	PA	$0	Column 2 * Column 4	Project - Allocated Intangible Plant's accumulated depreciation shall equal transmission allocated Intangible Plant's accumulated depreciation times NMPC Phase 2 Plant Allocation Factor.
13		Project Specific Accumulated Depreciation					$0	Sum of Line 9 - Line 12
14
15	Project Specific Net Plant In-Service
16		Transmission - Project Specific					$0	Line 2 + Line 9
17		General Plant					$0	Line 3 + Line 10
18		Common Plant					$0	Line 4 + Line 11
19		Intangible Plant					$0	Line 5 + Line 12
20		Project Specific Net Plant In-Service					$0	Sum of Line 16 - Line 20
21
22	Transmission Allocated Prepayments
23		Project Specific Prepayments	-	Schedule 7 Line 15 Column (5)	0.00%	PA	$0	Column 2 * Column 4	Project - Allocated Prepayments shall equal Transmission Related Prepayments multiplied by NMPC Phase 2 Plant Allocation factor.
24
25	Transmission Allocated Materials & Supplies
26		Project Specific Materials & Supplies	-	Schedule 7 Line 21 Column (5)	0.00%	PA	$0	Column 2 * Column 4	Project - Allocated Materials & Supplies shall equal Transmission Related Materials & Supplies multiplied by NMPC Phase 2 Plant Allocation factor.
27
28	Transmission Allocated Cash Working Capital
29		Project Specific Cash Working Capital	-	Schedule 7 Line 28 Column (5)	0.00%	PA	$0	Column 2 * Column 4	Project - Allocated Cash Working Capital shall equal Transmission Related Cash Working Capital multiplied by NMPC Phase 2 Plant Allocation factor.
30
31	Transmission Allocated Depreciation Expense
32		Transmission - Project Specific	-	NA	NA			Workpaper_	Project-related depreciation expense, excluding ARO, shall be determined based on FERC approved depreciation rates for NMPC's transmission facilities, as specified in Section 14.1.9.1.14 of Attachment H of the NYISO OATT, on a utility account basis to the Project Gross Plant In-service.
33		General Plant	-	Schedule 9 Line 2 Col 5	0.00%	PA	$0	Column 2 * Column 4	Project - Allocated General Plant's depreciation expense shall equal transmission allocated General Plant's depreciation expense times NMPC Phase 2 Plant Allocation Factor.
34		Common Plant	-	Schedule 9 Line 3 Col 5	0.00%	PA	$0	Column 2 * Column 4	Project - Allocated Common Plant's depreciation expense shall equal transmission allocated Common Plant's depreciation expense times NMPC Phase 2 Plant Allocation Factor.
35		Intangible Plant	-	Schedule 9 Line 4 Col 5	0.00%	PA	$0	Column 2 * Column 4	Project - Allocated Intangible Plant's depreciation expense shall equal transmission allocated Intangible Plant's depreciation expense times NMPC Phase 2 Plant Allocation Factor.
36		Project Specific Depreciation Expense					$0	Sum of Line 32 - Line 35
37
38	Transmission Allocated Real Estate Taxes
39		Electric Allocated Real Estate Taxes	-	Schedule 9 Line 12 Col 1					Project - Allocated portion of Transmission Related Real Estate Tax shall equal electric allocated real estate taxes multiplied by gross transmission plant allocation factor, the result further multiplied by NMPC Phase 2 Plant Allocation factor.
40		Gross Transmission Plant Allocation Factor	0.00%	Schedule 5 Line 19
41		Project Specific Real Estate Taxes	-	Line 39 * Line 40	0.00%	PA	$0	Column 2 * Column 4
42
43	Transmission Allocated Operation and Maintenance Expenses
44		Transmission O&M - Project Specific	-	NA	NA		$0	Workpaper_	Project - Related Operation and Maintenance "O&M" Expense shall be based on charges to project-specific work orders. O&M costs that cannot be directly attributed to a project shall equal transmission allocated O&M costs minus charges to project-specific work orders, the net times NMPC Phase 2 Plant Allocation Factor.
45		Transmission O&M - Allocate	-	Schedule 9 Line 23 Column 5	0.00%	PA	$0	(Column 2 - Line 44 Column 5)* Column 4
46		Project Specific O&M Expenses					$0	Line 44 + Line 45
47
48	Transmission Allocated A&G Allocation
49		Administrative and General Expenses	-	Schedule 9, Column 5, Line 33	0.00%	WS	$0	Column 2 * Column 4	Project - Allocated Administrative and General "A&G" Expense shall equal the sum of Transmission allocated A&G Expenses, Transmission allocated Pension & OPEB Expenses, and Transmission allocated Payroll Tax Expense times the NMPC Phase 2 Transmission Wage and Salary Allocation Factor, plus NMPC Phase 2 Plant Allocation Factor times sum of Transmission Allocated Property Insurance and Transmission Related Research & Development expenses.
50		Pension and Benefits Expenses	-	Schedule 9, Column 5, Line 35	0.00%	WS	$0	Column 2 * Column 4
51		Payroll Tax Expenses	-	Schedule 9, Column 5, Line 44	0.00%	WS	$0	Column 2 * Column 4
52		Subtotal					$0	Sum of Line 49 - Line 51
53
54		Property Insurance (924)	-	Schedule 9, Column 5, Line 34	0.00%	PA	$0	Column 2 * Column 4
55		Research and Development	-	Schedule 9, Column 5, Line 36	0.00%	PA	$0	Column 2 * Column 4
56		Subtotal					$0	Line 54 + Line 55
57
58		Project Specific A&G and Payroll Tax Expenses					-	Line 52 + Line 56
59
60
61	NMPC Phase 2 Allocation Factors
62		NMPC Phase 2 Plant In-Service					$0	Line 2 Column 5
63		Transmission Plant in Service					$0	Line 2 Column 2
64		NMPC Phase 2 Plant Allocation Factor "PA"					0.00%	Line 62 / Line 63
65
66		Transmission Wage and Salary					$0	FF1 354-355.21.b
67		NMPC Phase 2 Plant Allocation Factor					0.00%	Line 64 Column 5
68		Project Specific Wage and Salary					$0	Line 66 * Line 67
69		NMPC Phase 2 Trans. Wage and Salary Allocation Factor "WS"					0.00%	Line 68 / Line 66

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1

NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 14 OATT Attachment H - Annual Transmission Revenue Requireme --> 14.2-14.2.1 OATT Att H Attachment 1 to Attachment H

Niagara Mohawk Power Corporation																		Attachment 1
Revenue Requirement Calculation by Phase 2 Project																		Schedule 16f
NMPC Phase 2 Eligible projects																		Page 1 of 1

	Shading denotes an input

		(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)	(11)	(12)	(13)	(14)	(15)	(16)	(17)
		Project Specific					Project allocated using Weighted Factor							Project Return and Associated Taxes
													Net Investment Base	NYPSC-Approved ROE		FERC-Approved ROE
Line No.	Eligible Projects (c)	In-Service Month	Plant In-Service amount	Project Weighted Factor	Accumulated Depreciation	Net Plant In-Service	Net allocated General Plant	Net allocated Common Plant	Net allocated Intangible Plant	ADIT - Using Allocator	(Excess)/Deficient ADIT	Other Rate Base Items		Cost of Capital Rate	Return & Asso. Taxes (a)	Cost of Capital Rate	Return & Asso. Taxes (a)	Adjustment to TSC Rate (a)
							Line 2* Project Weighted Factor

1a	=			0.00%	-	-	-	-	-	-	-	-	-	-	-	=	-	-
1b	=			0.00%	-	-	-	-	-	-	-	-	-	-	-	=	-	-
1c	=			0.00%	-	-	-	-	-	-	-	-	-	-	-	=	-	-
1d	=			0.00%	-	-	-	-	-	-	-	-	-	-	-	=	-	-
1e	=			0.00%	-	-	-	-	-	-	-	-	-	-	-	=	-	-
1f	-			0.00%	-	-	-	-	-	-	-	-	-	-	-	=	-	-
1g	-			0.00%	-	-	-	-	-	-	-	-	-	-	-	=	-	-
1h	-			0.00%	-	-	-	-	-	-	-	-	-	-	-	=	-	-
1i	-			0.00%	-	-	-	-	-	-	-	-	-	=	-	=	-	-
1j	-			0.00%	-	-	-	-	-	-	-	-	-	=	-	=	-	-
1k	-			0.00%	-	-	-	-	-	-	-	-	-	=	-	=	-	-
1m	-			0.00%	-	-	-	-	-	-	-	-	-	=	-	=	-	-
1n	-			0.00%	-	-	-	-	-	-	-	-	-	=	-	=	-	-
1[]	-					-	-	-	-	-	-	-	-	=	-	=	-	-
2	Total (Sum of Line 1a 1[])		-	0%	-	-	-	-	-	-	-	-	-		-		-	-

	Reference		Workpaper_		Workpaper_	Col.2 + Col.4	S16e Line 17	S16e Line 18	S16e Line 19	S16a Line 3	S16a Line 4	S16e Line 23,26,29	Sum of Col.5 - 11	S16b Line 19	Col.12*Col.13	S16b Line 38	Col.12*Col.15	Col.16-Col.14



		(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)	(11)	(12)	(13)	(14)	(15)	(16)
		Project Specific					Project allocated using Weighted Factor (a)									TSC Revenue Requirement Credit
Line No.	Eligible Projects (c)	In-Service Month	0	Return - using Proj. Spec. ROE	Depreciation Expense (b)	O&M Expense	Allocated General Plant Depre. Exp.	Allocated Common Plant Depre. Exp.	Allocated Intangible Plant Depre. Exp.	Amortization of (Excess)/Deficient ADIT	Real Estate Taxes	Allocated O&M Exp.	Allocated A&G and Payroll Tax Exp.	Allocated Billing Adjustments	Total Base Revenue Requirement	Adjustment to TSC Rate (a)	Project Spec. RR Credit

3a	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3b	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3c	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3d	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3e	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3f	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3g	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3h	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3i	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3j	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3k	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3m	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3n	-		0.00%	-	-	-	-	-	-	-	-	-	-	-	-	-	-
3[]					-	-	-	-	-	-	-	-	-	-	-	-	-
4	Total (Sum 3a – 3[[])		0%	-	-	-	-	-	-	-	-	-	-	-	-	-	-

	Reference	Line 1 Col. 1	Line 1 Col. 3	Line 1 Col. 14	Workpaper_	Workpaper_	S16e Line 33	S16e Line 34	S16e Line 35	S16a Line 11	S16e Line 41	S16e Line 45	S16e Line 58	S16a Line 15	Sum of Col.3 - 13	Line 1 Col.17	Col.14+Col.15


Notes:
(a)	First year calculation to be prorated based on project's actual in-service date.
(b)	First year Depreciation Expense to be calculated based on project's actual in-service date.
(c)	Niagara Mohawk Power Corporation will include additional eligible projects as approved by FERC and State authorities.

Effective Date: 1/24/2026 - Docket #: ER26-589-000 - Page 1