Rate Calculation by 2X3Zv7m

VIEWS: 8 PAGES: 14

									                                                      IDAHO POWER COMPANY
                                             Transmission Cost of Service Rate Development
                                                       12 Months ended 12/31/05

                                                                            Source            Amount
     TRANSMISSION RATE BASE
 1   Transmission Plant                                                  FF1 p207 58(g)        580,381,676
 2   Generator Step Up Facilities                                            Schedule 7        (15,953,431)
 3   General Plant                                                           Schedule 1         29,035,745
 4   Intangible Plant                                                        Schedule 1          9,310,145
 5   Transmission Plant Held For Future Use                                   FF1 p214             612,900
 6   General Plant Held For Future Use                                       Schedule 1            118,563
 7   Transmission Depreciation Reserve (Acct 108)                        FF1 p 219 25(b)      (200,078,275)
 8   Transmission Depreciation Reserve (Acct 108) Generator Step-Ups         Schedule 7          8,755,484
 9   General Plant Depreciation                                              Schedule 1        (12,101,593)
10   Amortization of Utility Plant                                           Schedule 1         (4,261,015)
11   ADIT Allocated to Trans                                                 Schedule 1        (35,881,003)
12   ADIT Allocated to Gen & Intang                                          Schedule 1         (2,370,663)
13   Transmission Related Loss on Reaquired Debt                             Schedule 1          2,496,662
14   Transmission Related Other Regulatory Assets/Liabilities                Schedule 1                  0
15   Transmission Related Prepayments                                        Schedule 1          2,340,451
16   Transmission Materials & Supplies                                       Schedule 1          4,800,910
17   Transmission Cash Working Capital                                       Schedule 1          4,138,836
18   Transmission Rate Base                                             Sum (1) thru (17)      371,345,392
19
20   RETURN AND ASSOCIATED INCOME TAXES
21   Overall Return                                                           Schedule 6          0.08457
22   Composite Income Tax (Federal and State)                                 Schedule 6          0.03638
23   Return and Income Taxes                                              (18)*((21)+(22))     44,914,225
24
25
26   EXPENSES
27   Deprec Expense: Transmission                                           FF1 p 336 7f       12,490,634
28   Deprec Expense: General Plant                                           Schedule 2         2,128,197
29   Depreciation Expense: Intangible Plant                                  Schedule 2         1,144,525
30   Transmission Related Amortization of Loss on Reacquired Debt            Schedule 2           206,514
31   Amort of ITC (Acct 411.4)                                               Schedule 2           346,969
32   O&M Expense: Transmission                                          FF1 p 321 100 b        21,989,736
33     Less Account 561 (Load Dispatching)                                FF1 p 321 84b        (2,971,942)
34     Less: Account 565 (Transmission of Electricity By Others)          FF1 p 321 88b        (7,657,106)
35   O&M Expense: A&G                                                        Schedule 2        11,120,951
36   Taxes Other than Income:                                                Schedule 2         4,061,904
37   Transmission Expense                                              Sum (27) Thru (36)      42,860,380
38
39   Gross Transmission Revenue Requirement                                      (21)+(35)     87,774,606
40
41   Transmission Revenue Credits                                             Schedule 4       (15,820,635)
42
43   Net Transmission Revenue Requirement                                       (37) - (39)    71,953,970
44
45   System Peak Demand - MW                                                  Schedule 5             3,075
46
47   Annual Rate $/kW per year                                            (41)/((43)*1000)          23.40
48   Monthly Rate $/kW per month                                                  (45) / 12        1.9500
49   Weekly Rate $/kW per week                                                    (45) / 52        0.4500
50   Daily Rate $/kW per day (Mon-Sat)                                             (47) / 6        0.0750
51   Daily Rate $/kW per day (Sunday)                                              (47) / 7        0.0643
52   Hourly Rate $/MW per hour (Peak)                                    (45)*1000 / 4896            4.78
53   Hourly Rate $/MW per hour (Off-Peak)                                (45)*1000 / 8760            2.67
                                              IDAHO POWER COMPANY
                                     Transmission Cost of Service Rate Development
                                               12 Months ended 12/31/05


                                                   Schedule 1
                                              Allocated Investment

                                                                                           Source          Amount
 1   ADIT Allocated to Transmission
 2
 3             ADIT (Account 281)                                                    FFI p 273 8k               -
 4             ADIT (Account 282)                                           Schedule 1 Workpaper        239,876,396
 5             ADIT (Account 283)                                                    FF1 p 277 9k        23,430,274
 6             ADIT (Account 190)                                      Less Schedule 1 Workpaper        (48,315,472)
 7             Sum of ADIT                                                                              214,991,198
 8             Transmission Plant Allocator                                             Schedule 3     0.166895220
 9             ADIT Allocated to Transm                                                                  35,881,003
10
11
12   General Plant
13
14             General Plant Investment                                              FF1 p207 90g       217,508,189
15             Transmission Wages & Salaries Allocator                                 Schedule 3      0.133492650
16             Trans Related General Plant                                                               29,035,745
17
18
19   General Plant Depreciation Reserve
20
21             GP Accum Depr                                                         FF1 p 219 27b       90,653,627
22             Transmission Wages & Salaries Allocator                                  Schedule 3     0.133492650
23             Trans Related GP Depr                                                                     12,101,593
24
25
26   Intangible Plant
27
28             Intangible Plant Investment                                            FF1 p205 5 g       69,742,756
29             Transmission Wages & Salaries Allocator                                  Schedule 3     0.133492650
30             Trans Related Intangible Plant                                                             9,310,145
31
32
33   Amortization of Utility Plant
34
35             Amortization of Utility Plant                                         FF1 p200 21 b      (31,919,472)
36             Transmission Wages & Salaries Allocator                                  Schedule 3     0.133492650
37             Trans Related Amortization of Utility Plant                                               (4,261,015)
38
39
40   ADIT Allocated to General & Intangible
41
42             ADIT (Account 281)                                                     FFI p 273 8k              -
43             ADIT (Account 282)                                                     FF1 p 275 2k      239,876,396
44             ADIT (Account 283)                                                     FF1 p 277 9k       23,430,274
45             ADIT (Account 190)                                                     FF1 p234 8c       (48,315,472)
46             Sum of ADIT                                                                              214,991,198
47             General & Intangible Plant Allocator                                     Schedule 3     0.011026790
48             ADIT to General & Intangible                                                               2,370,663
49
50
51   Cash Working Capitol
52
53             O&M Expense: Transmission                                          FF1 p 321 100 b       21,989,736
54             A&G O&M Expense                                                         Schedule 2       11,120,951
55             Working Capital Allowance                                        ((53)+(54)) * 0.125      4,138,836
56
57
58   Transmission Related Loss on Reaquired Debt
59
60             Unamortized Loss on Reaquired Debt                                    FF1 p111 81c        14,032,339
61             Plant Allocator                                                         Schedule 3      0.177922010
62             Transmission Related Loss on Reaquired Debt                                                2,496,662
63
64   Other Regulatory Assets / Liabilities
65
66             FAS 106 Balance:
67                Account 182.3 (Regulatory Assets)                                   FF1 p 232 4 f            -
68                Account 254 (Regulatory Liabilities)                                  FF1 p 278              -
69                Net                                                                                          -
70                Transmission Wages & Salaries Allocator                               Schedule 3     0.133492650
71                Allocated to Transmision                                                                     -
72             FAS 109 Balance:
73                Account 182.3 (Regulatory Assets)                                FF1 p 232 10f               -
74                Account 282 (Regulatory Liabilities)              (Unfunded ADIT) FF1 p 278 35f              -
75                Net                                                                                          -
76                Plant Allocator                                                       Schedule 3    0.1779220100
77               Allocated to Transmission                                                                     -
78             Total Other Regulatory Assets / Liabilities                                                     -
79
80   Prepayments
81
82             Prepayments                                                           FF1 p111 57c        17,532,437
83             Transmission Wages & Salaries Allocator                                 Schedule 3      0.133492650
84             Transmission Related Prepayments                                                           2,340,451
85
86   General Plant Held For Future Use
87            General Plant Held For Future Use                                          FF1 p.214          888,162
88            Transmission Wages & Salaries Allocator                                   Schedule 3     0.133492650
89            Transmission Related General Plant Held For Future Use                                        118,563
90
91   Transmission Materials and Supplies
92           Account 154 - Transmission                                              FF1 p 227 8(c)       4,465,632
93           Account 154 - General                                                   FF1 p 227 10c          766,156
94           Transmission Wages & Salaries Allocator                                    Schedule 3     0.133492650
95           Transmission Related Account 154 - General                                                     102,276
96           Account 163                                                             FF1 p 227 15c        1,745,428
97           Transmission Wages & Salaries Allocator                                   Schedule 3      0.133492650
98           Transmission Related Account 163                                                               233,002
99           Total Transmission Materials and Supplies                                                    4,800,910
                                       IDAHO POWER COMPANY
                              Transmission Cost of Service Rate Development
                                        12 Months ended 12/31/05

                                       Schedule 1 Workpaper
                                         ADIT Adjustments

                                                                               Source               Amount
 1   ADIT Allocated to Transmission
 2
 3             ADIT (Account 282)                                        FF1 p 275 2k           226,279,312
 4             Plus: Other (FF1 Line 4)                                See Footnote 1
 5              Repair Allowance                                  FF1 p 274 Footnotes                53,185
 6              Bridger                                           FF1 p 274 Footnotes               324,857
 7              N. Valmy                                          FF1 p 274 Footnotes               810,266
 8              FERC Jurisdictional                               FF1 p 274 Footnotes             7,818,502
 9              Taxable CIAC in CWIP Bal                          FF1 p 274 Footnotes            (5,730,646)
10              CIAC Taxable Income - Acct 253.575                FF1 p 274 Footnotes                85,531
11              Misc Software Develop Costs                       FF1 p 274 Footnotes              (844,491)
12              Intangible Asset - Labor                          FF1 p 274 Footnotes            11,079,880
13              Subtotal                                                                         13,597,084
14
15             Total ADIT (Account 282)                                    Lines 3 & 13         239,876,396
16
17
18             ADIT (Account 190)                                        FF1 p234 8c              75,888,667
19             Less FASB 109 Account                                     FF1 p234 2c             (41,627,445)
20             Plus: Other (FF1 Line 17)                               See Footnote 2
21              Minimum Pension Liability                         FF1 p 234 Footnotes             3,947,905
22              Rate Case Disallowance                            FF1 p 234 Footnotes             3,316,285
23              Other Employee's Long Term Deffered Comp.         FF1 p 234 Footnotes             2,424,225
24              Post Retiree Benefits                             FF1 p 234 Footnotes             1,893,065
25              SFAS 112 - Post Retirement Benefits               FF1 p 234 Footnotes             1,037,355
26              Non-VEBA Pension and Benefits                     FF1 p 234 Footnotes               905,653
27              Restricted Stock Plan                             FF1 p 234 Footnotes               215,673
28              Linden Feeder Deposits                            FF1 p 234 Footnotes               128,814
29              Dark Fiber Contracts                              FF1 p 234 Footnotes               101,285
30              Other Regulatory Liabilities                      FF1 p 234 Footnotes                83,990
31                                                                                               14,054,250
32
33             Total ADIT (Account 190)                              Lines 18, 19, & 31          48,315,472

     Footnotes:
     1) Excluding balances related to: FASB 109
     2) Excluding balances relating to: Senior Management Security Plan, Micron - CIAC, Meridian Gold
          Contributions, Start-up and Organization Costs, Seattle City Light - CIAC, and Loss on Pioneer Land
          Write-down
                                               IDAHO POWER COMPANY
                                      Transmission Cost of Service Rate Development
                                                12 Months ended 12/31/05

                                                      Schedule 2
                                                  Allocated Expenses

                                                                                               Source          Amount
1    A&G Expense
2
3            Total A&G Related O&M                                                    FF1 p 323 168 b        81,724,444
4              Acct 924 (Property Insurance)                                    (1) - FF1 p 323 156 b        (2,866,971)
5              Acct 928 (Regulatory Commission Expense)                         (2) - FF1 p 323 160 b        (4,009,949)
6              Account 930.1 (General Advertising Expense)                      (3) - FF1 p 323 162 b          (120,381)
7            Transmission Wages & Salaries Allocator                                       Schedule 3      0.133492650
8            A&G to Transmission, excl Prop ins; Reg Comm Exp; Adv.                                           9,975,524
9
10           Total Property Insurance                                                  FF1 p 323 156 b        2,866,971
11           Plant Allocator                                                                Schedule 3    0.1779220100
12           Property Insurance to Transmission                                                                 510,097
13
14           Regulatory Commission Expenses - FERC                                          FF1 p350          3,570,833
15           Plant Allocator                                                               Schedule 3     0.1779220100
16           Regulatory Commission Expenses to Transmission                                                     635,330
17
18           Regulatory Commission Expenses - Other Transmission Related                    FF1 p350                -
19
20           General Advertising Expense - Transmission Specific                                                    -
21
22           Total A&G to Transmission                                        (8)+(12)+(16)+(18)+(21)       11,120,951
23
24   General Plant Depreciation
25
26           General Plant Depreciation                                                  FF1 p 336 9 b       15,942,426
27           Transmission Wages & Salaries Allocator                                       Schedule 3      0.133492650
28           Trans Related General Plant                                                                      2,128,197
29
30   Investment Tax Credit
31
32           Amortized ITC - Electric (Account 411.4)                                    FF1 p114 19c        1,950,116
33           Transmission, General & Intangible Plant Allocator                            Schedule 3       0.17792201
34           Allocated ITC                                                                  (32) * (33)        346,969
35
36
37           Total ITC Credit                                                                                  346,969
38
39
40   Taxes Other Than Income Taxes
41
42           Property Taxes (ID,OR,MT,NV,WA)                                      FF1 pp262-263 col i        17,191,919
43           Amount Direct Assigned to Transmission For 2005                          Direct Assigned          3,232,337
44           Amount Direct Assigned to General For 2005                               Direct Assigned          1,334,763
45           Transmission Wages & Salaries Allocator                                      Schedule 3       0.133492650
46             Allocated Amount                                                     Line 44 x Line 45            178,181
47           FOAB (Soc Sec) and Unemp Tax                                       FF1 pp262-263.1 col i          9,697,237
48           Payroll Adjustment                                                  FOAB & Unempl Tax           (9,697,237)
49           Transmission Wages & Salaries Allocator                                      Schedule 3       0.133492650
50             Allocated Amount                                                                                        0
51           Franchise & Regulatory Commission Fees                                   FF1 pp262-263.1          3,661,074
52           Plant Allocator                                                                Schedule 3     0.177922010
53             Allocated Amount                                                                                  651,386
54           Total Taxes Other Than Income Taxes                                                               4,061,904
55
56
57   Transmission Related Amortization of Loss on Reaquired Debt
58
59           Amortized Loss on Reaquired Debt (Account 428.1)                            FF1 p117 64c         1,160,697
60           Plant Allocator                                                               Schedule 3      0.177922010
61           Transmission Related Amortization of Loss on Reaquired Debt                                        206,514
62
63
64   Transmission Related Amortization of Intangible Plant (Account 405)
65
66           Amortization of Intangible Plant                                             FF1 p336 1 d       8,573,690
67           Transmission Wages & Salaries Allocator                                        Schedule 3      0.13349265
68           Transmission Related Amortization of Intangible Plant                                           1,144,525
                                   IDAHO POWER COMPANY
                          Transmission Cost of Service Rate Development
                                    12 Months ended 12/31/05

                                           Schedule 3
                                           Allocators


 1   Transmission Wages and Salaries
 2
 3              Transmission Wage Expense                          p.354.19b          7,887,916
 4              A&G Wage Expense                                   p.354.24b         32,908,558
 5              Total Wage Expense                                 p.354.25b         91,997,326
 6              Transmission Wages & Salaries Allocator         (3) / (5) - (4)    0.133492650
 7
 8
 9
10   Plant Allocator
11
12
13              Transmission Plant                           FF1 p 207 58 g         580,381,676
14              Allocated General & Intangible Plant                                 38,345,890
15              Total Electric Plant                         FF1 p 207 95 g       3,477,521,238
16              Plant Allocator                             (13) + (14) / (15)     0.177922010
17
18
19
20   Transmission Plant Allocator
21
22              Transmission Plant                           FF1 p 207 58 g         580,381,676
23              Total Electric Plant                         FF1 p 207 95 g       3,477,521,238
24              Transmission Plant Allocator                      (22) / (23)      0.166895220
25
26
27
28   General and Intangible Plant Allocator
29
30              Transmission Related General Plant               Schedule 1          29,035,745
31              Transmission Related Intangible Plant            Schedule 1           9,310,145
32              Sum                                                                  38,345,890
33              Total Electric Plant                         FF1 p 207 95 g       3,477,521,238
34              General & Intangible Plant Allocator              (32) / (33)        0.01102679
                              IDAHO POWER COMPANY
                     Transmission Cost of Service Rate Development
                               12 Months ended 12/31/05

                                 Schedule 4
                         Transmission Revenue Credits


1    Rent From Electric Property (Account 454)
2    The transmission related amount of Rent From Electric Property included
3    in Account 454 is :
4    City of Seattle                                                               $53,820
5    Pacificorp                                                                 $8,879,021
6      Adjustment to exclude PacifiCorp non-transmission revenue                  -$63,935
7      Total                                                                    $8,868,906
8
9    Revenues From Transmission For Others (Account 456):
10   City of Seattle                                                                $4,860
11   Vigilante                                                                     $15,000
12   Non Firm - Third Party                Schedule 4 Workpaper                 $6,603,664
13     Total                                                                    $6,623,524
14
15   NF Service For Self                        Schedule 4 Workpaper             $328,205
16
17
18
19   Total Transmission Revenue Credit                 Lines 7,13,& 15         $15,820,635
          IDAHO POWER COMPANY
 Transmission Cost of Service Rate Development
           12 Months ended 12/31/05

              Schedule 4 Workpaper

 NON FIRM WHEELING REVENUES FOR 2005
          Recorded in Account 456

Company                       Annual
APS                            $    29,894
ARON                           $    10,826
AVST                           $        29
BHP                            $        81
BPAP                           $     1,989
CRGL                           $ 789,946
IPCM                           $ 328,205
MSCG                           $    64,633
PAC                            $ 1,458,218
PGEM                           $    28,413
PPLM                           $    63,130
PPMI                           $ 121,213
PSCM                           $       179
PSEM                           $    23,508
PWX                            $ 1,230,587
REMC                           $     3,278
SPPM                           $ 2,776,306
TEMU                           $     1,435
TOTAL                          $ 6,931,869

Third Party                    $ 6,603,664
                                                                     IDAHO POWER COMPANY
                                                            Transmission Cost of Service Rate Development
                                                                      12 Months ended 12/31/05


                                                          SCHEDULE 5
                                                   IDAHO POWER COMPANY
                                           ALLOCATION DEMAND AND CAPABILITY DATA
                                                           2005


                                          Firm Network
                      Firm Network         Service for Long-Term Firm Other Long Term Short-Term Firm
                    Service for Self 1/      Others     Transmission    Firm Service   Transmission          TOTAL
                         Form 1              Form 1     Reservations       Colton      Reservations
         January          2052                169           488              3               0                 2712
        February          2072                175           488              3               38                2776
           March          1805                147           488              0               50                2490
            April         2160                141           488              0              150                2939
             May          2306                179           563              0               0                 3048
            June          2979                265           563              0               0                 3807
             July         2960                286           563              0               0                 3809
          August          2812                261           563              0               0                 3636
       September          2392                232           563              0               68                3255
         October          1744                157           563              0               40                2504
       November           2059                179           563              0               0                 2801
       December           2332                197           563              0               25                3117

12 CP (Rounded)           2306                199            538               1               31              3075

                    1/ Includes Weiser and Raft River

                                  Firm Network Service For Others (Data From Form 1 )
                         Imnaha            USBR         Raft River        BPA - PF        BPA-OTECC           Total

         January         0.39403                0             9              109               51              169
        February         0.41615                0             9              119               47              175
           March         0.31857                0             8               97               42              147
            April        0.32291                6             8               89               38              141
             May          0.1967               32            33               84               30              179
            June         0.19887               64            47              115               39              265
             July        0.31248               59            59              123               45              286
          August         0.31983               54            46              116               45              261
       September          0.2072               48            45              106               33              232
         October         0.28392               22            12               88               35              157
       November          0.38339                0            10              119               50              179
       December          0.45108                0            11              131               55              197

12 CP (Rounded)             0                  24            25              108               43              199


                                                          Long-Term Firm Transmission - OASIS Reservations
                           APS               IPCM           IPCM            IPCM            IPCM           IPCM           IPCM       IPCM      IPCM      TOTAL
                                           70237836       70237874                                          70241483                70388764 70416899
       OASIS Ref:       70337968                                           144968             96618                       143190
                                            (59306)        (79606)                                          (144434)               (70361498) (144968)
         January            25                 30            171              75               25              75           87          0         0       488
        February            25                 30            171              75               25              75           87          0         0       488
           March            25                 30            171              75               25              75           87          0         0       488
            April           25                 30            171              75               25              75           87          0         0       488
             May            25                 30            171              75               25              75           87         75         0       563
            June            25                 30            171              75               25              75           87         75         0       563
             July           25                 30            171              75               25              75           87         75         0       563
          August            25                 30            171              75               25              75           87         75         0       563
       September            25                 30            171               0               25              75           87         75        75       563
         October            25                 30            171               0               25              75           87         75        75       563
       November             25                 30            171               0               25              75           87         75        75       563
       December             25                 30            171               0               25              75           87         75        75       563

12 CP (Rounded)             25                 30            171              50               25               75          87        50        25        538



                                          Short Term Firm Transmission Reservations - OASIS
                                                                                                                          TOTAL
                          SPPM                APS          MSCG              PWX              IPCM          Third Party

January                                                                                         0               0            0
February                                                                      38                0               38          38
March                                                                         50                0               50          50
April                                                                        150                0              150         150
May                                                                                             0               0            0
June                                                                                            0               0            0
July                                                                                            0               0            0
August                                                                                          0               0            0
September                                                                     68                0               68          68
October                                                                       40                0               40          40
November                                                                                        0               0            0
December                                       25                                               0               25          25

12cp                                           2                              29                0               31          31
                                                 IDAHO POWER COMPANY
                                        Transmission Cost of Service Rate Development
                                                  12 Months ended 12/31/05


                                               SCHEDULE 5 WORKPAPER
                                                IDAHO POWER COMPANY
                                  RECONCILIATION OF DEMAND AND CAPABILITY DATA WITH
                                                     2005 FORM 1

                                Monthly Transmission System Peak Load, FERC Form 1, page 400
                         Column A          Column B       Column C        Column D         Column E
                                         Firm Network
                       Firm Network       Service for  Long-Term Firm Other Long Term Short-Term Firm
                     Service for Self 1/    Others      Transmission     Firm Service    Transmission              TOTAL
          January          2052              169             376              3               25                    2625
         February          2072              175             376              3               63                    2689
            March          1805              147             376              0               67                    2395
             April         2160              141             25               0              142                    2468
              May          2306              179             25               0                4                    2514
             June          2979              265             25               0               70                    3339
              July         2960              286             476              0                0                    3722
           August          2812              261             476              0                0                    3549
        September          2392              232             401              0              100                    3125
          October          1744              157             401              0               40                    2342
        November           2059              179             401              0                0                    2639
        December           2332              197             401              0                0                    2930

12 CP (Rounded)            2306              199              313                1                 43               2862

                1/ Includes Weiser and Raft River


                      Reconciliation of FERC Form 1, page 400, STF, with the 2005 Rate Calculation STF
                      Form 1, p 400        APS            MSG 1/          PWX 2/ 3/         SPPM 4/           Rate Calculation
                     Total STF PTP (LTF/STF PTP)        (STF PTP)         (STF PTP)        (STF PTP)             STF PTP
                     Column E above                                                                            To Schedule 5
          January           25              -25                                                                      0
         February           63              -25                                                                      38
            March           67              -25             -4                 12                                    50
             April         142                              -4                 12                                   150
              May            4                              -4                                                       0
             June           70                                                                 -70                   0
              July           0                                                                                       0
           August            0                                                                                       0
        September          100                                                -32                                    68
          October           40                                                                                       40
        November             0                                                                                       0
        December             0               25                                                                      25

            12 CP           43                                                                                       31

                1/ A 4 MW daily reservation made by MSCG was not included in the rate calculation because it did not occur
                   at the time of the system peak.
                2/ A 50 MW reservation made by PWX was included in the Form 1 total as a 38 MW reservation. The
                   difference is 12 MW.
                3/ An 18 MW reservation made by PWX was included in the Form 1 total as 50 MW. The difference is 32
                   MW
                4/ A 70 MW daily reservation made by SPPM was not included in the rate calculation because it did not occur
                   at the time of the system peak


                       Reconciliation of FERC Form 1, page 400, LTF, with the 2005 Rate Calculation LTF

                      Form 1, p 400         APS 1/          IPCM 2/           IPCM 3/            IPCM 4/      Rate Calculation
                      Total LTF PTP       (LTF PTP)        (LTF PTP)         (LTF PTP)         (LTF PTP)         LTF PTP
                                          70337968           143190          70416899
                     Column C above                                                                            To Schedule 5
January                   376                 25               87                 0                                 488
February                  376                 25               87                 0                                 488
March                     376                 25               87                 0                                 488
April                      25                                  87                 0               376               488
May                        25                                  87                 0               451               563
June                       25                                  87                 0               451               563
July                      476                                  87                 0                                 563
August                    476                                  87                 0                                 563
September                 401                                  87                75                                 563
October                   401                                  87                75                                 563
November                  401                                  87                75                                 563
December                  401                                  87                75                                 563

12 CP                       313                                                                                     538

                1/   This reservation was included in the Short Term Firm total in the Form 1for January, February and March
                2/   This reservation was not included in the Long Term Firm total in the Form 1
                3/   This reservation was not included in the Long Term Firm total in the Form 1
                4/   For April, May and June, the following IPCM reservaions were not included in the Long Term Firm total in
                     the Form 1:
                        70237836 (59306), 70237874 (79606), 144968, 96618, 70241483 (144434) and 70388764 (70361498)
                        The sum of these contracts is shown
                                                              IDAHO POWER COMPANY
                                                     Transmission Cost of Service Rate Development
                                                               12 Months ended 12/31/05



                                                                            SCHEDULE 6
                                                          RATE OF RETURN AND INCOME TAX EXPENSE



 1   A OVERALL RATE OF RETURN
 2                                                                                Capitalization Structure                       Effective Cost
 3                                               Source                          Amount              Percent                Embedded        Weighted
 4
 5
 6       Long Term Debt                          Sched 6 Workpaper, p 1     $    955,460,000             0.5048                 0.05718        0.02886
 7
 8       Preferred Stock                                                    $                -           0.0000                 0.00000        0.00000
 9
10       Common Equity                           FERC 112 16c               $    937,318,467             0.4952                 0.11250        0.05571
11
12         Total Capitalization                                             $   1,892,778,467            1.0000                                0.08457
13
14
15                                                                                                                        Rate of Return       0.08457
16
17   B   INCOME TAX EXPENSE
18
19       Federal Tax Rate                                                   35.00%
20       Composite State Tax Rate                                           6.30%                Schedule 6 Workpaper, page 2
21
22       Federal Tax Factor:
23       (((ROR-Wtd.LTD) + [(EqAFUDC + ITC) / RateBase]) * (FT)) / (1-FT)                                                                      0.03052
24
25       State Tax Factor:
26       (((ROR-Wtd.LTD) + [(EqAFUDC + ITC) / RateBase] + Federal Income Tax Rate) * (ST)) / (1-ST)                                            0.00586
27
28
29                                                                                               Sum of Federal and State Tax Factors          0.03638
30
31
32
33                                  EQAFUDC =                               $         15,128 Schedule 6 Workpaper, page 3
34                                       ITC=                                        346,969 Schedule 2
                                                                                                     IDAHO POWER COMPANY
                                                                                            Transmission Cost of Service Rate Development
                                                                                                      12 Months ended 12/31/05

                                                                                                    Schedule 6 Workpaper, Page 1
                                                                                                     IDAHO POWER COMPANY
                                                                                                            FERC OATT
                                                                                                  EFFECTIVE EMBEDDED COST OF
                                                                                                         LONG-TERM DEBT
                                                                                                        At December 31, 2005
                                                                                                               ($000's)
                           (1)                            (2)          (3)            (4)            (5)              (6)         (7)               (8)          (9)              (10)            (11)           (12)          (13)
                                                                                                                               [Formula]                                  [(4)+(6)-(7)-(8)-(9)]              [(4) * (11)]   [(12)/(10)]
                                                                                                                                                                                  Net                          Annual
Line                                                   Date of          Principal Amount                                                        Expense       Tot Prem         Proceeds                        Interest     Effective
 No              Class and Series                       Issue        Issued     Outstanding         Price       Premium        Discount         of Issue      Exp, Disc        Received           Rate      Requirements      Cost
   First Mortgage Bonds:
1   7.20 % Series, due 2009 .…                       11/23/1999        80,000         80,000         100.000          0.0               0.0           500.0       182.8             79,317.2       7.200%         5,760.0    7.262
2   7.38 % Series, due 2007 .…                       12/1/2000         80,000         80,000         100.000          0.0               0.0           480.0     3,913.4             75,606.6       7.380%         5,904.0    7.809
3   6.60 % Series, due 2011 .…                        3/2/2001        120,000        120,000         100.000          0.0               0.0           750.0       121.3            119,128.7       6.600%         7,920.0    6.648
4   4.75 % Series, due 2012 .…                       11/15/2002       100,000        100,000          98.948          0.0           1,052.0           625.0       441.2             97,881.8       4.750%         4,750.0    4.853
5   6.00 % Series, due 2032 .…                       11/15/2002       100,000        100,000          99.456          0.0             544.0           750.0       441.2             98,264.8       6.000%         6,000.0    6.106
6   4.25 % Series, due 2013 .…                       5/13/2003         70,000         70,000          99.465          0.0             374.5           437.5       203.7             68,984.3       4.250%         2,975.0    4.313
7   5.5% Series, due 2033 .…                         5/13/2003         70,000         70,000          99.948          0.0              36.4           525.0     3,810.2             65,628.4       5.500%         3,850.0    5.866
8   5.5% Series, due 2034 .…                         3/26/2004         50,000         50,000          99.233          0.0             383.5           375.0       149.4             49,092.1       5.500%         2,750.0    5.602
9   5.875% Series, due 2034….                        8/16/2004         55,000         55,000          98.640          0.0             748.0           412.5       173.3             53,666.2       5.875%         3,231.3    6.021
10  5.30% Series, due 2035….                         8/26/2005         60,000         60,000          99.319          0.0             408.6           450.0     3,394.7             55,746.7       5.300%         3,180.0    5.704

11       Total First Mortgage Bonds                                   785,000        785,000                                        3,547.0         5,305.0    12,831.3            763,316.7                     46,320.3    6.068%

       Pollution Control Revenue Bonds:
12      6.05% Series 1996A, due 2026                 7/25/1996         68,100         68,100          99.308          0.0             471.3           442.7     3,403.3              63,782.8      6.050%         4,120.1    6.460
13      Var. Rate Series 1996B, due 2026 …(a)        7/25/1996         24,200         24,200         100.000          0.0               0.0            78.7       165.1              23,956.3      2.570%           621.9    2.596
14      Var. Rate Series 1996C, due 2026 …(b)        7/25/1996         24,000         24,000         100.000          0.0               0.0            78.0       222.1              23,699.9      2.558%           613.8    2.590
15      Port of Morrow VRC, due 2027…….…(c)           5/7/2000          4,360          4,360         100.000          0.0               0.0            50.0        72.5               4,237.5      2.984%           130.1    3.070
16      Var Rate Humboldt Series due 2024(d)         10/22/2003        49,800         49,800         100.000          0.0               0.0           252.2     1,451.1              48,096.6      2.422%         1,206.3    2.508

17 Total Pollution Control Revenue Bonds                              170,460        170,460                      -                   471.3           901.5     5,314.1            163,773.1                      6,692.2    4.086

18 TOTAL DEBT CAPITAL ...........                                   $955,460      $955,460.0                                       $4,018.3        $6,206.5   $18,145.4           $927,089.8                   $53,012.4      5.718%



(a) - Sweetwater 1996B Var Rate Bond. Rate in column (11) is an implied rate for the year. Interest in column (12) is the actual interest for the year.
(b) - Sweetwater 1996C Var Rate Bond. Rate in column (11) is an implied rate for the year. Interest in column (12) is the actual interest for the year.
(c) - Port of Morrow VRC Bond. Rate in column (11) is an implied rate for the year. Interest in column (12) is the actual interest for the year.
(d) - Humboldt Var Rate Bond. Rate in column (11) is an implied rate for the year. Interest in column (12) is the actual interest for the year.
(e) - Replaced 8.0% series that matured 3/15/04. Interest in column (12) is annualized.
(f) - Proceeds used to pay off preferred stock. Interest in column (12) is annualized.



       NOTE: American Falls Dam Bond and Milner Dam Note are guarantees. These instruments are excluded in rate making calculations and therefore are omitted from this schedule.
                          IDAHO POWER COMPANY
                 Transmission Cost of Service Rate Development
                           12 Months ended 12/31/05


                          Schedule 6 Workpaper, Page 2
                         Composite State Income Tax Rate
                            As of December 31, 2005




                                   Idaho     Oregon        Other    Composite

State Composite Rate (Accrued)      5.90%       0.30%       0.10%      6.30%
             IDAHO POWER COMPANY
    Transmission Cost of Service Rate Development
              12 Months ended 12/31/05


             Schedule 6 Workpaper, Page 3
    Equity Portion of AFUDC in Depreciation Expense


             Equity AFUDC charged to CWIP
             Transmission Work Order Types
              January thru December 2005




   Account                     Amount
107000                     $    690,484


The annual composite depreciation rate
for transmission plant accounts (350 - 359)
is 2.191%

$     690,484       x            0.02191      =       $   15,128
                                  IDAHO POWER COMPANY
                         Transmission Cost of Service Rate Development
                                   12 Months ended 12/31/05


                                        SCHEDULE 7

                                      Step Up Stations
                                   Transformer Investment
                                       By Vintage Year


                                               Vintage   Years in                    Accumulated
             LOCATION              Category     Year     Service         Cost        Depreciation
American Falls Power Plant           353        1978       28              648,863         385,165
American Falls Power Plant           353        1980       26                 -969             -534
Bliss Power Plant Gooding            353        1950       56              316,404         375,635
Bliss Power Plant Gooding            353        1964       42                1,416           1,261
Boardman                             353        1980       26              375,527         206,990
Boardman                             353        1992       14                2,011              597
Boardman                             353        2000        6                1,470              187
Boardman                             353        2004        2               64,213           2,723
Brownlee Power Plant Adams           353        1959       47              748,173         745,480
Brownlee Power Plant Adams           353        1963       43                 -276             -251
Brownlee Power Plant Adams           353        1980       26            1,541,722         849,797
Brownlee Power Plant Adams           353        1994       12              866,480         220,433
Brownlee Power Plant Adams           353        2000        6               11,285           1,435
Brownlee Power Plant Adams           353        2003        3               15,167              965
Cascade Power Plant                  353        1983       23              257,772         125,690
Clear Lake Power Plant               353        1965       41               19,808          17,217
Danskin Power Plant                  353        2001        5              259,219          27,477
Hells Canyon Power Plant Wallo       353        1967       39              945,897         782,068
Hells Canyon Power Plant Wallo       353        2000        6                2,681              341
Jim Bridger                          353        1975       31              262,266         172,361
Jim Bridger                          353        1976       30              842,488         535,822
Jim Bridger                          353        1990       16              965,852         327,617
Jim Bridger                          353        1994       12               42,236          10,745
Jim Bridger                          353        1995       11               27,259           6,357
Jim Bridger                          353        1996       10               45,684           9,685
Jim Bridger                          353        2000        6              972,906         123,754
Jim Bridger Steam Plant              353        2003        3              208,642          13,270
Lower Malad Power Plant              353        1948       58               81,119          99,744
Lower Malad Power Plant              353        1958       48                1,551           1,578
Lower Salmon Power Plant Goodi       353        1949       57              303,512         366,764
Milner Power Plant                   353        1992       14              664,294         197,162
Oxbow Power Plant Baker              353        1949       57              100,827         121,840
Oxbow Power Plant Baker              353        1951       55               43,216          50,390
Oxbow Power Plant Baker              353        1957       49              208,866         216,970
Oxbow Power Plant Baker              353        1961       45              423,846         404,349
Oxbow Power Plant Baker              353        1979       27                2,964           1,696
Oxbow Power Plant Baker              353        1980       26                6,099           3,362
Oxbow Power Plant Baker              353        1999        7              132,897          19,722
Oxbow Power Plant Baker              353        2000        6                3,395              432
Shoshone Falls Power Plant Jer       353        1992       14              306,659          91,016
Strike C J Power Plant Owyhee        353        1952       54              344,947         394,895
Strike C J Power Plant Owyhee        353        1965       41                1,480           1,287
Strike C J Power Plant Owyhee        353        1972       34                  610              440
Strike C J Power Plant Owyhee        353        1973       33                  317              222
Strike C J Power Plant Owyhee        353        1982       24               32,437          16,504
Swan Falls Power Plant Ada           353        1994       12              432,055         109,915
Swan Falls Power Plant Ada           353        1995       11                    3                1
Thousand Springs Power Plant         353        1940       66                    0                0
Thousand Springs Power Plant         353        1956       50               36,470          38,658
Twin Falls Power Plant (New)         353        1995       11              430,708         100,441
Twin Falls Power Plant Twin Fa       353        1949       57               39,459          47,682
Upper Malad Power Plant              353        1948       58               31,129          38,276
Upper Malad Power Plant              353        1987       19                2,109              850
Upper Malad Power Plant              353        1988       18                  279              106
Upper Salmon A Power Plant           353        1937       69               72,168         105,567
Upper Salmon A Power Plant           353        1954       52                  418              461
Upper Salmon B Power Plant           353        1947       59               70,393          88,047
Valmy #1                             353        1981       25            2,057,788       1,090,628
Valmy #1                             352        1982       24              241,978          74,916
Valmy #1                             353        1982       24             -608,813        -309,764
Valmy #1                             352        1983       23               -2,725             -809
Valmy #1                             353        1983       23              -18,917          -9,224
Valmy #1                             352        1984       22                   -2               -1
Valmy #1                             353        1984       22                  -17               -8
Valmy #1 and #2                      352        1987       19              186,211          45,640
Valmy #1 and #2                      353        1987       19             -281,448        -113,367
Valmy #2                             353        1985       21            1,156,804         515,009
Valmy #2                             353        1986       20                5,129           2,175
Valmy #2                             353        1988       18                 -982             -375

Total                                                               $ 15,953,431     $   8,755,484

								
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