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HomeMy WebLinkAbout20040220Hessing Exhibits.pdf~~ n t ' I : 1 N' P ' ;X : :: q r 6 s - : (1 ) 0- ' .j : o . . ~ Z : = ; : S' ~ Z gq ~ ~ en n ... . . . . .. . . . . . I ... . . . . P' t : d 0 0 ... . . . . CO M P A R I S O N O F J U R I S D I C T I O N A L Al l O C A T O R S Ca s e N o . I P C - 94 - 5 t o C a s e N o . I P C - O3 - Ca s e N o . I P C - O3 - De s c r i p t i o n IP C - 94 - IP C - 03 - To t a l Id a h o All o c a t o r To t a l Id a h o Al l o c a t o r Co m p a n Co m p a n Cu s t o m e r A l l o c a t i o n s Av e r a g e N u m b e r o f C u s t o m e r s - D A 9 0 9 30 6 , 4 3 0 28 9 94 8 94 . 62 % 40 7 31 1 38 9 97 4 95 . 74 % De m a n d A l l o c a t i o n s Tw e l v e C o i n c i d e n t P e a k D e m a n d - D 1 0 13 8 07 6 84 9 77 4 86 . 52 % 19 8 , 4 0 4 07 6 , 4 3 7 94 . 4 5 % En e r g y A l l o c a t i o n s Ge n e r a t i o n L e v e l E n e r g y - E 1 14 , 4 9 1 12 1 39 4 75 9 85 . 53 % 10 7 57 6 27 5 01 2 94 . 10 % U: \ k h e s s i n \ I P C E 0 3 1 3 \ S t a f f C a s e \ C o m p a r i s o n o f J S S A l l o c a t o r s 2/ 1 0 / 2 0 0 4 ID A H O C O M M I S S I O N S T A F F JU R I S D I C T I O N A L S E P A R A T I O N S T U D Y - R E V E N U E R E Q U I R E M E N T FO R TH E TW E L V E M O N T H S E N D I N G D E C E M B E R 3 1 20 0 3 WI T H A L L A D J U S T M E N T S RE T A I L J U R I S D I C T I O N S SU M M A R Y AL L O e ! TO T A L ID A H O TO T A L TO T A L FI R M 3 D E S C R I P T I O N SO U R C E SY S T E M IP U C RE T A I L RE S A L E TR A N S F E R SU M M A R Y O F R E S U L T S ' " 6 R A T E O F R E T U R N U N D E R P R E S E N T R A T E S TO T A L C O M B I N E D R A T E B A S E 60 0 61 9 12 6 48 1 82 4 49 2 1 , 55 9 92 6 94 4 50 0 46 0 19 1 72 2 SA L E S R E V E N U E S 57 6 03 9 17 8 54 3 33 2 60 5 57 1 66 8 73 1 37 0 44 7 OT H E R O P E R A T I N G R E V E N U E S 58 2 21 4 97 5 99 0 87 8 10 8 24 3 98 7 4, 4 6 0 11 8 TO T A L O P E R A T I N G R E V E N U E S 61 8 62 1 39 2 57 9 30 8 59 5 60 9 54 6 83 9 61 4 , 4 3 4 4, 4 6 0 11 8 OP E R A T I N G E X P E N S E S OP E R A T I O N & M A I N T E N A N C E E X P E N S E S 37 0 56 3 22 0 34 6 81 9 65 6 36 4 ; 6 9 2 81 6 3, 4 9 3 24 5 37 7 16 0 DE P R E C I A T I O N E X P E N S E 99 5 21 7 03 6 65 3 81 3 23 7 60 2 , 4 4 5 57 9 53 4 AM O R T I Z A T I O N O F L I M I T E D T E R M P L A N T 81 8 33 8 08 9 40 3 57 9 08 7 45 2 17 3 , 7 9 9 TA X E S O T H E R T H A N I N C O M E 21 , 4 0 9 72 4 48 2 79 3 93 0 32 5 12 1 21 6 35 8 18 3 PR O V I S I O N F O R D E F E R R E D I N C O M E T A X E S 10 9 04 3 03 0 14 9 15 9 88 1 36 1 ) (4 8 47 7 ) IN V E S T M E N T T A X C R E D I T A D J U S T M E N T (3 0 8 16 6 ) (3 0 0 34 6 ) (3 1 3 20 5 ) 23 4 80 5 FE D E R A L I N C O M E T A X E S 36 8 28 9 77 1 18 6 75 3 05 3 (1 7 86 8 ) (3 6 6 89 6 ) ST A T E I N C O M E T A X E S 3, 4 7 5 57 4 38 3 52 1 53 4 89 2 75 5 ) (5 6 56 3 ) TO T A L O P E R A T I N G E X P E N S E S 51 7 , 4 3 1 23 9 48 3 31 3 01 5 50 9 15 0 08 6 25 9 60 8 02 1 54 5 OP E R A T I N G I N C O M E 10 1 19 0 15 3 99 5 58 0 10 0 39 6 75 3 35 4 82 6 43 8 57 4 AD D : I E R C O O P E R A T I N G I N C O M E 57 8 25 4 13 1 , 02 0 50 5 25 9 99 5 CO N S O L I D A T E D O P E R A T I N G I N C O M E 10 8 , 7 6 8 , 4 0 7 10 3 , 12 6 60 0 10 7 90 2 01 2 42 7 82 1 43 8 57 4 RA T E O F R E T U R N U N D E R P R E S E N T R A T E S 79 5 % 95 9 % 91 7 % 07 4 % 1. 4 5 3 % 27 D E V E L O P M E N T O F R E V E N U E R E Q U I R E M E N T S RA T E O F R E T U R N R E Q U I R E D ~ 1 0 . 0% R O E 65 0 % RE T U R N A T C L A I M E D R A T E O F R E T U R N 11 3 35 9 57 4 EA R N I N G S D E F I C I E N C Y 23 2 97 3 NE T - TO - GR O S S T A X M U L T I P L I E R 1. 4 4 6 RE V E N U E D E F I C I E N C Y 79 6 88 0 I FIR M J U R I S D I C T I O N A L R E V E N U E S 48 3 96 1 , 36 9 PE R C E N T I N C R E A S E R E Q U I R E D 06 % SA L E S A N D W H E E L I N G R E V E N U E S R E Q U I R E D 49 8 75 8 24 9 t2 ~ n t'I : 1 N' P' & :: q g ; ., . . . -- - ( 1 ) 0- ' CJ ) ' " 7 . , . . . .j : o . . C J ) ~ . . . . . . . S' ~ Z gq ~ ~ en n .. . . . . . .. . . . . . " "" " " P' t : d ... . . . . U:l k h e s s i n I I P C E 0 3 1 3 1 S ( a f f C a s e l A c o u n U n 9 J S S R e s u l t s 2 - 17 - 04 2 1 1 9 / 2 0 0 4 t0 ~ O t : d i0 ' P ' ;X : ~: : q g; ~ 1 6 ~ ~ Z: : ; , ' gJ . o Z ~ ~ ~ en O - , .. . . . . . I P' t : d 0 ... . . . . Li n e Ta r i f f D e s c r i p t i o n Un i f o r m T a r i f f R a t e s : Re s i d e n t i a l S e N i c e Sm a l l G e n e r a l S e N i c e La r g e G e n e r a l S e N i c e Du s k t o D a w n L i g h t i n g La r g e P o w e r S e N i c e Ag r i c u l t u r a l I r r i g a t i o n S e N i c e Un m e t e r e d G e n e r a l S e N . St r e e t Li g h t i n g 10 Tr a f f i c C o n t r o l L i g h t i n g 11 To t a l U n i f o r m T a r i f f s Sp e c i a l C o n t r a c t s : 12 Mi c r o n 13 J R S i m p l o t 14 D O E 15 To t a l Sp e c i a l C o n t r a c t s To t a l I d a h o Re t a i l S a l e s U:l k h e s s i n l i P C E 0 3 1 3 l S l a f f C a s e l C O S E x h i b i l s 2 / 1 1 / 2 0 0 4 Id a h o C o m m i s s i o n S t a f f Re s u l t s o f We i Q h t e d 1 2 C P Co s t o f S e r v i c e S t u d y Fo r I d a h o P o w e r C o m p a n y St a t e o f I d a h o No r m a l i z e d 1 2 - Mo n t h s E n d i n g D e c e m b e r 3 1 , 20 0 3 (1 ) (2 ) Ra t e 20 0 3 A v g . Sc h . N u m b e r o f No . Cu s t o m e r s (4 ) Cu r r e n t Ba s e Re v e n u e (5 ) (6 ) (7 ) Av g . Ce n t s Pe r K W H (8 ) (3 ) 20 0 3 S a l e s No r m a l i z e d (k W h ) W1 2 C P Re v e n u e Pe r c e n t Ch a n G e Re v e n u e Ad i u s t m e n t s 33 5 , 60 5 14 1 , 39 3 , 4 2 6 21 4 , 28 9 , 4 1 2 (2 , 32 4 , 00 9 ) 21 1 , 96 5 , 4 0 3 (1 . 08 ) % 32 , 31 6 26 5 , 33 5 , 66 7 16 , 7 9 8 , 4 7 9 87 , 59 1 16 , 88 6 , 07 0 52 % 17 , 4 1 5 01 4 , 4 2 6 , 98 6 10 7 , 66 9 , 01 1 (3 , 78 6 , 25 7 ) 10 3 , 88 2 , 75 4 3. 4 5 (3 . 52 ) % 87 2 , 58 6 1, 3 8 9 , 11 2 (1 , 5 1 9 , 20 7 ) (1 3 0 , 09 5 ) (2 . 22 ) (1 0 9 . 37 ) % 10 5 97 8 , 82 4 , 23 7 55 , 06 3 , 58 1 (2 , 4 6 5 , 4 0 3 ) 52 , 59 8 , 17 8 (4 . 4 8 ) % 13 , 51 7 62 0 , 93 0 , 93 1 60 , 29 1 , 58 0 28 , 4 7 0 , 28 6 88 , 7 6 1 , 8 6 6 5. 4 8 47 . 22 % 22 4 16 , 05 4 , 94 2 90 7 , 69 1 (3 1 3 , 56 2 ) 59 4 , 12 9 3. 7 0 (3 4 . 55 ) % 1, 4 3 2 17 , 91 2 , 03 9 1 , 80 9 , 26 5 (4 9 1 , 8 0 9 ) 31 7 , 4 5 6 (2 7 . 18 ) % 38 4 21 8 28 4 14 7 36 5 27 2 78 2 (4 . 00 ) % 40 1 , 6 7 2 11 , 07 0 , 13 5 , 03 2 45 8 , 50 2 , 27 8 17 , 64 6 , 26 5 47 6 , 14 8 , 54 3 85 % 63 6 , 96 7 , 67 0 16 , 20 4 , 10 7 (1 , 66 6 , 38 3 ) 14 , 53 7 , 72 4 (1 0 . 28 ) % 18 6 , 68 4 , 66 5 63 2 , 57 1 (6 6 4 , 12 3 ) 96 8 , 4 4 8 (1 4 . 34 ) % 20 3 , 08 4 , 14 6 62 2 , 4 1 3 (1 1 5 , 22 4 ) 50 7 , 18 9 (2 . 4 9 ) % 02 6 , 73 6 , 4 8 1 25 , 4 5 9 , 09 1 (2 , 4 4 5 , 7 3 0 ) 23 , 01 3 , 36 1 (9 . 61 ) % 40 1 , 67 5 12 , 09 6 , 87 1 , 5 1 3 48 3 , 96 1 , 36 9 15 , 20 0 , 53 5 49 9 , 16 1 , 90 4 14 % Li n e T o r i f f De s c r i p t i o n Un i f o r m T o r i f f R a t e s : Re s i d e n t i a l S e r v i c e Sm a l l G e n e r a l S e r v i c e Lo r g e G e n e r a l S e r v i c e Du s k t o D a w n L i g h t i n g Lo r g e P o w e r S e r v i c e Ag r i c u l t u r a l I r r i g a t i o n S e r v i c e Un m e t e r e d G e n e r a l Se r v o St r e e t L i g h t i n g 10 Tr a f f i c C o n t r o l L i g h t i n g 11 To t a l U n i f o r m T a r i f f s Sp e c i a l C o n t r a c t s : 12 Mi c r o n 13 J R S i m p l o t 14 D O E 15 To t a l S p e c i a l C o n t r a c t s t2 ~ O t : d N' P ' ;X : :: q r 6 S " ' . 1 6 (I ) ' " 7 0 - ' .j : o . . ~ ~: : ; . . _. 0 '" 7 . ~ gq ~ ~ en O - .. . . . . . ' P' t'I : 1 . . . . . . . ... . . . . To t a l I d a h o Re t a i l S a l e s U:l k h e s s i n \ I P C E 0 3 1 3 \ S l a f f C a s e l C e S E x h i b i t s 2 / 1 7 / 2 0 0 4 Id a h o C o m m i s s i o n S t a f f Re s u l t s o f 4 M o n t h W e i Q h t e d 1 2 C P Co s t o f S e r v i c e S t u d y Fo r I d a h o P o w e r C o m p a n y St a t e o f I d a h o No r m a l i z e d 1 2 - Mo n t h s E n d i n g D e c e m b e r 3 1 , 20 0 3 (1 ) (2 ) Ra t e 20 0 3 A v g . Sc h . N u m b e r o f No . Cu s t o m e r s (3 ) 20 0 3 S a l e s No r m a l i z e d (k W h ) (4 ) Cu r r e n t Ba s e Re v e n u e (5 ) (6 ) (7 ) Av g . Ce n t s Pe r K W H (8 ) Re v e n u e Ad j u s t m e n t s 4W 1 2 C P Re v e n u e Pe r c e n t Ch a n g e 33 5 , 60 5 14 1 , 39 3 , 4 2 6 21 4 , 28 9 , 4 1 2 (1 , 16 1 , 3 9 2 ) 21 3 , 12 8 , 02 0 (0 . 54 ) % 32 , 31 6 26 5 , 33 5 , 66 7 16 , 79 8 , 4 7 9 39 , 14 8 16 , 83 7 , 62 7 23 % 17 , 4 1 5 01 4 , 4 2 6 , 98 6 10 7 , 66 9 , 01 1 (3 , 64 0 , 93 0 ) 10 4 , 02 8 , 08 1 3. 4 5 (3 . 38 ) % 87 2 , 58 6 1, 3 8 9 , 11 2 (1 , 5 1 9 , 20 7 ) (1 3 0 , 09 5 ) (2 . 22 ) (1 0 9 . 37 ) % 10 5 97 8 , 82 4 , 23 7 55 , 06 3 , 58 1 (2 , 21 1 , 08 0 ) 52 , 85 2 , 50 1 (4 . 02 ) % 13 , 51 7 62 0 , 93 0 , 93 1 60 , 29 1 , 58 0 26 , 7 9 9 , 02 3 87 , 09 0 , 60 3 44 . 4 5 % 22 4 16 , 05 4 , 94 2 90 7 , 69 1 (3 0 1 , 4 5 1 ) 60 6 , 24 0 3. 7 8 (3 3 . 21 ) % 1, 4 3 2 17 , 91 2 , 03 9 1, 8 0 9 , 26 5 (4 9 1 , 8 0 9 ) 31 7 , 4 5 6 (2 7 . 18 ) % 38 4 21 8 28 4 14 7 36 5 27 2 (4 . 00 ) % 40 1 , 67 2 11 , 07 0 , 13 5 , 03 2 45 8 , 50 2 , 27 8 17 , 50 0 , 93 7 47 6 , 00 3 , 21 5 82 % 63 6 , 96 7 , 67 0 16 , 20 4 , 10 7 (1 , 60 5 , 83 0 ) 14 , 59 8 , 27 7 (9 . 91 ) % 18 6 , 68 4 , 66 5 63 2 , 57 1 (5 9 1 , 4 6 0 ) 04 1 , 11 1 (1 2 . 7 7 ) % 20 3 , 08 4 , 14 6 62 2 , 4 1 3 (1 0 3 , 11 3 ) 51 9 , 30 0 (2 . 23 ) % 02 6 , 7 3 6 , 4 8 1 25 , 4 5 9 , 09 1 (2 , 30 0 , 4 0 3 ) 23 , 15 8 , 68 8 (9 . 04 ) % 40 1 67 5 12 , 09 6 , 87 1 , 5 1 3 48 3 , 96 1 , 36 9 15 , 20 0 , 53 4 49 9 , 16 1 , 9 0 3 14 % Li n e Ta r i f f D e s c r i p t i o n Un i f o r m T a r i f f R a t e s : Re s i d e n t i a l S e r v i c e Sm a l l G e n e r a l S e r v i c e La r g e G e n e r a l S e r v i c e Du s k t o D a w n L i g h t i n g La r g e P o w e r S e r v i c e Ag r i c u l t u r a l I r r i g a t i o n S e r v i c e Un m e t e r e d G e n e r a l Se r v o St r e e t L i g h t i n g 10 Tr a f f i c C o n t r o l L i g h t i n g 11 To t a l U n i f o r m T a r i f f s Sp e c i a l C o n t r a c t s : 12 Mi c r o n 13 J R S i m p l o t 14 D O E 15 To t a l S p e c i a l C o n t r a c t s t2 ~ O t : d W' P' ~ ~ ~ g; ~ 1 6 ss : ~ Z ~ : ., . . . 0 Z fJ ~ ~ en O - rl - I N po t : d N To t a l I d a h o Re t a i l S a l e s U: \ k h e s s i n I I P C E 0 3 1 3 I S l a f f C a s e l C O S E x h l b i l s 2 / 1 1 / 2 0 0 4 Id a h o C o m m i s s i o n S t a f f Re s u l t s o f 12 C P Co s t o f S e r v i c e S t u d y Fo r I d a h o P o w e r C o m p a n y St a t e o f I d a h o No r m a l i z e d 1 2 - Mo n t h s E n d i n g D e c e m b e r 3 1 , 2 0 0 3 (1 ) (2 ) Ra t e 20 0 3 A v g . Sc h . N u m b e r No . Cu s t o m e r s (3 ) 20 0 3 S a l e s No r m a l i z e d (k W h ) (4 ) Cu r r e n t Ba s e Re v e n u e (5 ) (6 ) (7 ) Av g . Ce n t s Pe r K W H (8 ) Pe r c e n t Ch a n c e Re v e n u e Ad j u s t m e n t s 12 C P Re v e n u e 33 5 , 60 5 14 1 , 39 3 , 4 2 6 21 4 , 28 9 , 4 1 2 66 0 , 59 5 21 7 , 95 0 , 00 7 1. 7 1 % 32 , 31 6 26 5 , 33 5 , 66 7 16 , 7 9 8 , 4 7 9 22 6 , 90 2 17 , 02 5 , 38 1 6. 4 2 35 % 17 , 4 1 5 01 4 , 4 2 6 , 98 6 10 7 , 66 9 , 01 1 (1 , 9 5 7 , 56 0 ) 10 5 , 7 1 1 , 4 5 1 (1 . 8 2 ) % 87 2 , 58 6 1, 3 8 9 , 11 2 (1 , 4 9 3 , 28 2 ) (1 0 4 , 17 0 ) (1 . 7 7 ) (1 0 7 . 50 ) % 10 5 97 8 , 82 4 , 23 7 55 , 06 3 , 58 1 (7 9 9 , 52 7 ) 54 , 26 4 , 05 4 2. 7 4 (1 . 4 5 ) % 13 , 51 7 62 0 , 93 0 , 93 1 60 , 29 1 , 58 0 17 , 7 1 2 , 20 5 78 , 00 3 , 7 8 5 29 . 38 % 22 4 16 , 05 4 , 94 2 90 7 , 69 1 (3 2 0 , 64 9 ) 58 7 , 04 2 (3 5 . 33 ) % 1, 4 3 2 17 , 91 2 , 03 9 80 9 , 26 5 (4 9 1 , 8 0 9 ) 31 7 , 4 5 6 (2 7 . 18 ) % 38 4 21 8 28 4 14 7 (4 , 63 8 ) 27 9 50 9 (1 . 6 3 ) % 40 1 , 67 2 11 , 07 0 , 13 5 , 03 2 45 8 , 50 2 , 27 8 16 , 53 2 , 23 7 47 5 , 03 4 , 51 5 61 % 63 6 , 96 7 , 67 0 16 , 20 4 , 10 7 (1 , 22 3 , 24 9 ) 14 , 98 0 , 85 8 (7 . 55 ) % 18 6 , 68 4 , 66 5 63 2 , 57 1 (4 2 6 , 23 0 ) 20 6 , 34 1 (9 . 20 ) % 20 3 , 08 4 , 14 6 62 2 . 4 1 3 31 7 77 5 94 0 , 18 8 2. 4 3 87 % 02 6 , 7 3 6 , 4 8 1 25 , 4 5 9 , 09 1 (1 , 3 3 1 , 70 4 ) 24 , 12 7 , 38 7 (5 . 23 ) % 40 1 , 6 7 5 12 , 09 6 , 87 1 51 3 48 3 , 96 1 , 36 9 15 , 20 0 , 53 3 49 9 , 16 1 , 9 0 2 14 % IDAHO POWER COMPANY CASE NO. IPC-03- SECOND PRODUCTION REQUEST IDAHO IRRIGATION PUMPERS ASSN. TT A CHMENT TO RESPONSE TO REQUEST NO. 30 Exhibit No. 123 Case No. IPC-03- K. Hessing, Staff 2/20/04 Page 1 of 5 IDAHO POWER IDAHO POWER COMPANY O. BOX 70 BOISE, IDAHO 83707 An IDACORP Company Pete Pengilly Senior Analyst Pricing Regulatory Services Chq- rr 2281 Date: August 19, 2003 Re:Marginal Cost Analysis 2003 To:Maggie Brilz Attached are the results of the 2003 Marginal Cost Analysis. This is an update of the 1993 Marginal Cost Study completed by Patty Nichols. The 1993 study followed the model used for previous years studies. The concept and design of these studies is from the National Economic Research Associates Inc. (NERA) marginal cost model. The NERA model is constantly being refined but the basic concepts and methods have remained the same since Idaho Power began using this method. In this analysis, only the Generation Capacity, Transmission Capacity, and the Generation Energy marginal costs have been updated for use in the Company s class cost of service model. A five-year historic period and a five year forecast period were selected for this update. The historic data used for this analysis is from the years 1998 to 2002. The projected data used is from 2003 to 2007. Attachments Worksheets: Marginal Cost of Energy Annual Generation Capacity Marginal Costs Seasonalization of Generation Capacity Marginal Costs Annual Transmission Marginal Costs Seasonalization of Transmission Marginal Costs MRrginal Cost of Energy The marginal cost of energy was derived from output of the Company s power supply model AURORA. The model was run under median water conditions. The inputs were consistent with the inputs used for the normalized net power supply cost runs used for the 2003 rate case. However, since the marginal cost runs were done for a five year projected period, rather than a single test year, the existing power supply contracts were left in place for 2003 and then allowed Exhibit No. 123 Case No. IPC-03- K. Hessing, Staff 2/20/04 Page 2 of 5 to expire as contracted, the PPL and Tiber (CSPP) contracts were allowed to begin as contracted coal prices reflected the contracts in place, average gas prices were used, and additional resources were added as specified in the Company s 2002 Integrated Resource Plan (IRP). The model was first run for the five projected load years beginning with 2003. The model was then run a second time with the same inputs except the loads were increased by ten average megawatts shaped across all hours. The difference in power supply costs and the difference in megawatt hours were then used to calculate an average monthly marginal cost per megawatt hour. Added to this cost were the marginal fuel inventory, grossed up for cost of capital and taxes, and the marginal variable operation and maintenance costs. This loaded energy cost was then increased for losses at the transmission and distribution levels of service. Gp.neration C8p8city M8rginal Costs The annual generation capacity marginal costs were derived from data contained in Idaho Power s 2002 IRP. Because of transmission constraints to the west of the Treasure Valley which limits market imports, a simple cycle combustion turbine located east of Brownlee, is the most likely marginal peaking resource needed on the system. A 61.2 MW simple cycle combustion turbine was chosen as the next marginal peaking resource in the 2002 IRP. The investment in dollars per kw, the fixed operating and maintenance costs, weighted cost of capital, composite tax rate, escalation rate, and the after tax discount rate used in this analysis were all obtained from the 2002 IRP Technical Appendix. The life of the resource (35 years) used in calculating the carrying charge was obtained from Idaho Power s 2003 depreciation study. The materials and supplies costs loading factors are derived from an average of five historic years data, from the years 1998 through 2002. The revenue requirement, taxes, and the reserve margin calculations are based on year-end 2002 information. Sp.8son8li78tion of Gp.np.r8tion C8f18city M8rginal Costs The seasonalization of the generation capacity marginal costs is based on information from the 2002 IRP and five-year historic coincidence peak (CP) data from the FERC Form 1. Using the th percentile water and the 70th percentile load forecast information for the years 2003 to 2007 the 2002 IRP identifies June, July, August, November, and December as the months with generation deficiencies. The monthly CP information was used to identify what portion of the annual generation capacity marginal costs should be assigned to these months. For each month the percentage of that monthly CP to the annual CP was calculated. These percentages were averaged for each month for 1998 to 2002. These numbers were summed for the relevant months and the percent for each month of the total was calculated. This method assigned a portion of the annual generation capacity marginal costs to the months of June, July, August November, and December. Exhibit No. 123 Case No. IPC-03- K. Hessing, Staff 2/20/04 Page 3 of 5 TrAnsmission Marginal Costs The method of calculating the transmission marginal cost is similar to the method for calculating the generation capacity marginal cost. The cost of integrating a new network resource to meet native load service requirements was used. This is the cost of integrating a new gas fired generator located within 30 miles of Boise. This cost would be approximately $92 per kw for a 230 kv line and a small amount of 138 kv line to connect to distribution voltage. These costs were obtained from the Company s Grid Operations and Planning Department. This cost was then treated similarly to the generation capacity marginal costs. The cost was loaded with General Plant loadings. The economic carrying charge rate was calculated using the same inputs as the generation capacity costs except a different asset life (50 years) was used~ The asset life was obtained from Idaho Power s 2003 depreciation study. Operation & Maintenance and Administrative & General loadings were added to this cost. Materials & Supplies loadings that were derived from historic five-year averages and grossed up for revenue requirement and taxes were then added to complete the transmission marginal cost. Sp.Asom'!1i7Ation of TrAm;mission Marginal Costs The 2002 lAP identifies June, July, and August as the months that transmission constraints can be expected in future years. Since the lAP identifies these months as the ones with transmission constraints, the marginal cost of transmission capacity was allocated to these months based on average monthly CP as compared to the annual CP for the years 1998 to 2002 using the same method as was used for the generation capacity marginal costs. Exhibit No. 123 Case No. IPC-03- K. Hessing, Staff 2/20/04 Page 4 of 5 (1 ) (2 ) (3 ) (4 ) (5 ) (6 ) (7 ) (8 ) (9 ) (1 0 ) (1 1 ) (1 2 ) (1 3 ) (1 4 ) t2 ~ O t : d N' P ' ri . :: q g ; s - : 0(1 ) o- ' .j : o . . ~ :: ; . . S' ~ Z ~g q ~ ~ (f Q e n .. . . . . . (1 ) . . . . . . . I t: d W HJ W VI ~ Id a h o P o w e r C o m p a n y Ma r g i n a l C o s t A n a l y s i s 2 0 0 3 Ma r g i n a l C o s t o f E n e r g y - D o l i a r s / M w h An n u a l Av g . Ja n Fe b Ap r Ma y Ju n Ju l Se p Oc t Na v De e Au g Ma r - - ~ ~ - ~ ~ . -- - - - ~ -- - _n Ma r g i n a l G e n e r a t i o n C o s t a t G e n e r a t i o n $2 6 . $2 2 , $2 3 . $2 0 . $2 3 . $2 6 . 4 4 $3 3 . 2 7 $3 3 . $2 7 . $2 4 , $2 6 . $2 8 . $2 7 . Ma r g i n a l F u e l I n v e n t o r y $1 3 . $1 3 . $1 3 . $1 3 . $1 3 . $1 3 . $1 3 . $1 3 . $1 3 . $1 3 . $1 3 . $1 3 . Co s t o f C a p i t a l f o r F u e l I n v e n t o r y (2 ) x 8 . 58 9 % ( 8 ) $1 . 1 9 $1 . 1 9 $1 . $1 . $1 . 1 9 $1 . 1 9 $1 . 1 9 $1 . 1 9 $1 . 1 9 $1 . 1 9 $1 . $1 . 1 9 Co s t o f C a p i t a l G r o s s e d f o r T a x e s (3 ) x 1 . 64 s 1 Q $1 . 9 6 $1 . $1 . 9 6 $1 . 9 6 $1 . 9 6 $1 . $1 . 9 6 $1 . 9 6 $1 . 9 6 $1 . 9 6 $1 . $1 . 9 6 Ma r g i n a l V a r i a b l e 0 & Me n ) $3 . $3 . $3 . $3 . $3 . $3 . $3 . $3 . $3 . $3 . $3 . $3 . Ma r g i n a l e n e r g y c o s t a t G e n e r a t i o n $3 3 . $2 9 . $3 0 . $2 7 . $3 0 . $3 3 . $4 0 . $4 0 . $3 4 . $3 1 . $3 3 . $3 5 . $3 3 . Av e r a g e S y s t e m l o s s f a c t o r C o e f f i d e n t s ( E ) a t : Tr a n s m i s s i o n 1.0 5 5 05 5 05 5 05 5 05 5 05 5 05 5 05 5 05 5 1.0 5 5 1.0 5 5 05 5 Di s t r i b u t i o n Ma r g i n a l e n e r g y c o s t a t S e r v i c e L e v e l Po w e r S u p p l y ( 6 ) $3 3 , $2 9 . $3 0 . $2 7 . $3 0 . $3 3 . $4 0 . $4 0 . $3 4 . $3 1 . $3 3 . $3 5 . $3 3 . Tr a n s m l s s t o n ( 8 ) x ( 6 ) $3 5 . $3 1 . $3 2 . $2 9 , $3 1 . 9 3 $3 5 . $4 2 . $4 3 . $3 6 . $3 3 . $3 5 . $3 7 . $3 5 . Di s t r i b u ~ o n ( 9 ) x ( 6 ) $3 7 . $3 3 . $3 4 . $3 1 . $3 4 . $3 7 . $4 5 , $4 6 . $3 9 . 4 0 $3 5 , $3 7 . $3 9 . $3 7 . "- - u_ u - . .- - - r_ - - . .. - - -- - Ja n Fe b Ap r Ma y Ju n Ju l Se p Oc t No v De e Av g . Au g Ma r ,., A u r o r a P o w e r S U p p l y M o d e l 2 0 0 3 t o 2 0 0 7 ~, D e c e m b e r 3 1 , 2 0 0 2 ,O t D e t e m b e r 3 1 , 20 0 2 (I I ) I P C n 2 0 0 2 I R P T e c I 1 n l C i l I A p p e l ' " l I . 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