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r,,-;--
INTERMOUNTAIN GAS COMPANY
Income Tax Calculation for the Staff-Proposed
Adjusted Test Year
1 Operating Revenues
2 Operating Expenses (except Income Taxes
3 Earnings Before Interest & Income Taxes
Interest Charges:
4 Rate Base
5 Long-Term & Short-Term Debt Weighted
Average Interest Cost
6
7 State Taxable Income
8 Less: State Taxes ~ 6-1/2%
9 Federa 1 Taxab 1 e Income
10 Federal Taxes ~ 46%
Less:
11 Surtax Exemption
12 I . T . C . Amort i za t ion
13 Net Federal Tax
14 State Taxes
15 Amortization of Unfunded Future
Tax Liability (Federal Portion =
3,761,653 .; 18 Yrs. Remaining)
16 Income Taxes for Test Year as Adjusted
17 Income Taxes for Normalized Test Year
18 Adjustment
(A)
$ 67,468,523
4.392%
(B)
$ 143,203,382
- 134,749,892
$ 8,453,490
2,963,218
$ 5,490,272
356,868
$ 5,133,404
$ 2,361,366
( 19,250)
( 116,000)
$ 2,226,116
356,868
208,981
$ 2,791,965
2,866,667
H 74,702)
INTERMOUNTAIN GAS COMPANY
CASE NUMBER U-I034-99
Staff Exhibi t No. 102
Schedule 6 - Revised
Marian Hylen