March 4, 2004

Rocky Mountain Area Transmission Study RRocky ocky MMountain ountain AArea rea TTransmission ransmission SStudytudy

Steering Committee Meeting

2013 Case

Alt 1 & 2 - Iteration 2 – Test Transmission SolutionsAlt 3 & 4 – Iteration 1 - Define Congestion

March 4, 2004

2 2013 Case

Observation/Qualifications – Alt 1 & 2

Results from Alternative 2 (regionally “optimized”- pseudo IRP for the region) shows greater value to the Rocky Mountain region over Alternative 1 (existing & uncoordinated company IRPs)

Results:• Quantify the value of Alternate 2 over Alternate 1 • Validate the need to build new transmission to integrate “new” resources in the

Rocky Mountain area • Highlight the need to reinforce the Bridger and Central Wyoming transmission

(LMP values ~$10 to $20 lower than other locations, even within the region). • Pave the way to consider reinforcing export paths ($57 LMP at LADWP vs $22 at

Laramie River) Reminder, results account for just VOM costs; no

consideration has been given thus far to transmission & resources capital costs

3 2013 Case

Generation Alternatives for 2013 runs

20% of wind nameplate applies toward capacity

Designed Alternative 1 based RMATS load growth, IRPs and minimum new transmission; configured incremental resource additions in each state to meet projected load growth plus reserves in that state; major wind in CO-E and SW Wyoming close to load centers.Designed Alternative 2 based on RMATS load growth with a focus on Powder River coal and open range wind (cheaper resource cost) and may require more transmission in the region. Designed Alternative 3 as an export case (incremental resources equal to 2 times RMATS load growth) with additional Powder River (and Utah) coal and open range wind necessitating more transmission for export.Designed Alternative 4 as a larger export case (3 times RMATS load growth) Powder River (and Utah) coal and open range wind necessitating more transmission for export.

1 2 3 4Coal 1250 500 1540 2500Gas 210 210 210 603Wind 800 500 800 1500CoalGasWind 250 250CoalGasWind 125 125 125 125Coal 575GasWind 440CoalGas 260 260Wind 225 280 500 1000Coal 250 500 750GasWind 0 950 1000Coal 359 609 1109GasWind 50 100 200CoalGasWindCoal 200 950 950GasWindCoalGasWind 250 100 200 320Coal 575 575 575 575Gas 525 140 140 140Wind 120 250CoalGasWind 250 250 250 250CoalGasWind 125CoalGasWind 500 500 1500CoalGasWind 925 1150 1000 2450Coal 700 1400 2100Gas 50 50 50Wind 800Coal 575 575 575GasWind 160 230CoalGasWind

Total Coal 2600 2959 6149 8559Total Gas 785 350 660 1053Total Wind Nameplate 2575 2955 4955 10440Total Firm Energy 3900 3900 7800 11700

State Bubble Gen Type Name Plate Generation Values

Colorado

Idaho

Montana

Colorado East

Colorado West

KGB

Mid Point/Boise/Snake

Montana West

WYO(IDA)

LRS

SW Wyoming

Wyoming

Black Hills

Broadview

Utah

Wyoming

2013 ALTERNATIVE CASES

WYO(MT)

Colstrip/Crossover

Bonanza

Utah South

Big Horn Basin

IPP

Utah North

Jim Bridger

Yellowtail

4 2013 Case

Iteration 2 – TAWG Solutions

1000 MW1-345 kV Colstrip to Reno1-345/230 kV at Reno2-345/230 kV at Colstrip1-345 kV Treasureton to Ben Lomond

West of Broadview

500 MW345/230 kV at NaughtonWest of Naughton

700 MW1-345 kV Bridger to Naughtonto Ben Lomond1-230 kV Midpoint to Boise

Bridger West

800 MW1-345 kV Bridger to MidpointBridger West

500 MW1-345 kV Bridger to Miners to Cheyenne

TOT 4A

700 MW1-345 kV DJ-LRSWY - LRS

1000 MW1-345 kV Cheyenne to Ault to Green Valley1-345 kV Reno to LRS to Ault to Green Valley

TOT 3

700 MW1-345 kV Reno to DJ Cheyenne1-345 kV Reno to LRS

C Wyoming

Incremental Improvement

(MW)

LinePath

1000 MW1-345 kV Colstrip to Reno1-345/230 kV at Reno2-345/230 kV at Colstrip1-345 kV Treasureton to Ben Lomond

West of Broadview

500 MW345/230 kV at NaughtonWest of Naughton

700 MW1-345 kV Bridger to Naughtonto Ben Lomond1-230 kV Midpoint to Boise

Bridger West

800 MW1-345 kV Bridger to MidpointBridger West

500 MW1-345 kV Bridger to Miners to Cheyenne

TOT 4A

700 MW1-345 kV DJ-LRSWY - LRS

1000 MW1-345 kV Cheyenne to Ault to Green Valley1-345 kV Reno to LRS to Ault to Green Valley

TOT 3

700 MW1-345 kV Reno to DJ Cheyenne1-345 kV Reno to LRS

C Wyoming

Incremental Improvement

(MW)

LinePath

Alternative 1

Alternative 2Alternative 1

5 2013 Case

NELWAY

BRIDGER(2240 M W)

COLSTRIP(2280 M W)

GOSHEN

BORAH

KINPORT

M IDPOINT

TAFT

GARRISON

DW ORSHAK(476 M W)

TOW NSENDBROADVIEW

BELL

BENLOMOND

NAUG HTON(723 M W )

ANACONDA

ATLANTICCITY

ROCKSPRING S

M ONUM ENT

MUSTANG

SPENCE

BR ID G ERW EST

T OT 4A

W EST O FBR OADVIEW

BILLINGS

Y ELLOWTAIL

CUSTER

GREATFALLS

OVANDO

HOTSPRINGS

CABGORGE

(230 M W)NOXON

(561 M W)

LOLO

HELLSCANYON(450 M W)

OXBOW(220 M W )

BROWNLEE(730 M W )

BOISE

HATWAI

MOSCOW

BENEW AH

RIVERTON

BUFFALO

OREGONBAS IN

THERM OPOLIS

WY ODAK(375 M W )

CASPER

SHERIDAN

PLATTE

DAVE JOHNSTON(830 M W)

M ILES CITYDC T IE

CALDWELL

WANETA

BOR AHW EST

TERMINAL

M ONA

FOUR CORNERS(2060 M W)

90SOUTHCAM P

WILLIAM S

BONANZA(425 M W )

HUNTINGTON(894 M W)

SIGURD

IPP(1800 M W)

GONDER

HARRYALLEN

M ACHACEK

PAVANTHUNTER

(1341 M W)

TO ADELANTO GLENCANYON

HUMBOLDT

M ON T ANA T ONOR T HW EST

CROSS-OVER

W EST O FCR O SSO VER

AM PS

IDAHO -M O NT AN A

JEFFER SON

DILLONPETERSONFLATS

IDAHO -SIERR A

BR O W N LEEEAST

T O T 4B

BON ANZAW ES T

IPPDC

PAVAN T-GO ND ER &IPP-G O NDER

IPP -M O NA

IPP -G ON DE R

LIBBY(632 M W)

HUNGRY HORSE(322 M W)

W EST OFH AT W AI

COLO

MONTANA

W YOIDAHO

UTAH

PAT H C

CRAIG(1224 M W)

SAN JUAN(1798 M W)

HAYDEN(488 M W)

LARAM IERIVER

ARCHER

AULT

RIFLE

M ONTROSE

PINTO

CURECANTI

T O T2C

T OT2B

T OT2A

T O T1A

PONCHA

TO T3

SIDNEY

STORY

L E G E N D:

500KV

+-500KVDC

345KV230KV115-161KV

LANGE

WESTHILL

STEGAL

COM ANCHE(725 M W)

M IDWAY

DANIELS PARKM ALTA

SMOKY HILL

PAWNEE(530 M W)

VALM ONT

DILLON

REDBUTTE

SOU TH O FYEL LO W T AIL

T O T 7

MO N TANA T OW YO M IN G

SW W YO M INGT O B ON ANZA

FLAM INGGORGE

TREASURETON

W ES T O FCO LSTR IP

MT - SE

NLE W IS TO N

Lam ar

T OT 5

Falcon

TO T2B2

T OT2B 1

W Y-LRS

BH -LR SBH -W Y

BH -B HB

N to SUtaH

Top Congested Paths

Transmission Constraints - Alternative 1

6 2013 Case

NELWAY

BRIDGER(2240 M W)

COLSTRIP(2280 M W)

GOSHEN

BORAH

KINPORT

M IDPOINT

TAFT

GARRISON

DW ORSHAK(476 M W)

TOW NSENDBROADVIEW

BELL

BENLOMOND

NAUG HTON(723 M W )

ANACONDA

ATLANTICCITY

ROCKSPRING S

M ONUM ENT

MUSTANG

SPENCE

BR ID G ERW EST

T OT 4A

W EST O FBR OADVIEW

BILLINGS

Y ELLOWTAIL

CUSTER

GREATFALLS

OVANDO

HOTSPRINGS

CABGORGE

(230 M W)NOXON

(561 M W)

LOLO


OXBOW(220 M W )

BROWNLEE(730 M W )

BOISE

HATWAI

MOSCOW

BENEW AH

RIVERTON

BUFFALO

OREGONBAS IN

THERM OPOLIS

WY ODAK(375 M W )

CASPER

SHERIDAN

PLATTE


M ILES CITYDC T IE

CALDWELL

WANETA

BOR AHW EST

TERMINAL

M ONA


90SOUTHCAM P

WILLIAM S

BONANZA(425 M W )

HUNTINGTON(894 M W)

SIGURD

IPP(1800 M W)

GONDER

HARRYALLEN

M ACHACEK

PAVANTHUNTER

(1341 M W)


HUMBOLDT


CROSS-OVER


AM PS

IDAHO -M O NT AN A

JEFFER SON

DILLONPETERSONFLATS

IDAHO -SIERR A

BR O W N LEEEAST

T O T 4B

BON ANZAW ES T

IPPDC


IPP -M O NA

IPP -G ON DE R

LIBBY(632 M W)


W EST OFH AT W AI

COLO

MONTANA

W YOIDAHO

UTAH

PAT H C

CRAIG(1224 M W)

SAN JUAN(1798 M W)

HAYDEN(488 M W)

LARAM IERIVER

ARCHER

AULT

RIFLE

M ONTROSE

PINTO

CURECANTI

T O T2C

T OT2B

T OT2A

T O T1A

PONCHA

TO T3

SIDNEY

STORY

L E G E N D:

500KV

+-500KVDC

345KV230KV115-161KV

LANGE

WESTHILL

STEGAL

COM ANCHE(725 M W)

M IDWAY

DANIELS PARKM ALTA

SMOKY HILL

PAWNEE(530 M W)

VALM ONT

DILLON

REDBUTTE


T O T 7



FLAM INGGORGE

TREASURETON


MT - SE

NLE W IS TO N

Lam ar

T OT 5

Falcon

TO T2B2

T OT2B 1

W Y-LRS

BH -LR SBH -W Y

BH -B HB

N to SUtaH

Transmission Constraints - Alternative 2

Top Congested Paths


Alternative 1Iteration 2

8 2013 Case

Transmission Additions – Alternative 1

RUN 1: Bridger to Naughton to Ben Lomond 345 line (Bridger

West and Naughton West) Miners to Bridger 345 and Miners 345/230

transformer. 230 Midpoint to Boise

Note: TOT 2C was the path with the highest congestion and opportunity cost, but was not included in Alternative 1 because the TAWG felt that it should be dealt with in an export case. Transmission additions to Path 2C will be analyzed in Alternatives 3 & 4.

9 2013 Case

Relieving Transmission Constraints-Alternative 1

NELWAY

BRIDGER(2240 M W)

COLSTRIP(2280 M W)

GOSHEN

BORAH

KINPORT

M IDPOINT

TAFT

GARRISON

DW ORSHAK(476 M W)

TOW NSENDBROADVIEW

BELL

BENLOMOND

NAUG HTON(723 M W )

ANACONDA

ATLANTICCITY

ROCKSPRING S

M ONUM ENT

MUSTANG

SPENCE

BR ID G ERW EST

T OT 4A

W EST O FBR OADVIEW

BILLINGS

Y ELLOWTAIL

CUSTER

GREATFALLS

OVANDO

HOTSPRINGS

CABGORGE

(230 M W)NOXON

(561 M W)

LOLO


OXBOW(220 M W )

BROWNLEE(730 M W )

BOISE

HATWAI

MOSCOW

BENEW AH

RIVERTON

BUFFALO

OREGONBAS IN

THERM OPOLIS

WY ODAK(375 M W )

CASPER

SHERIDAN

PLATTE


M ILES CITYDC T IE

CALDWELL

WANETA

BOR AHW EST

TERMINAL

M ONA


90SOUTHCAM P

WILLIAM S

BONANZA(425 M W )

HUNTINGTON(894 M W)

SIGURD

IPP(1800 M W)

GONDER

HARRYALLEN

M ACHACEK

PAVANTHUNTER

(1341 M W)


HUMBOLDT


CROSS-OVER


AM PS

IDAHO -M O NT AN A

JEFFER SON

DILLONPETERSONFLATS

IDAHO -SIERR A

BR O W N LEEEAST

T O T 4B

BON ANZAW ES T

IPPDC


IPP -M O NA

IPP -G ON DE R

LIBBY(632 M W)


W EST OFH AT W AI

COLO

MONTANA

W YOIDAHO

UTAH

PAT H C

CRAIG(1224 M W)

SAN JUAN(1798 M W)

HAYDEN(488 M W)

LARAM IERIVER

ARCHER

AULT

RIFLE

M ONTROSE

PINTO

CURECANTI

T O T2C

T OT2B

T OT2A

T O T1A

PONCHA

TO T3

SIDNEY

STORY

L E G E N D:

500KV

+-500KVDC

345KV230KV115-161KV

LANGE

WESTHILL

STEGAL

COM ANCHE(725 M W)

M IDWAY

DANIELS PARKM ALTA

SMOKY HILL

PAWNEE(530 M W)

VALM ONT

DILLON

REDBUTTE


T O T 7



FLAM INGGORGE

TREASURETON


MT - SE

NLE W IS TO N

Lam ar

T OT 5

Falcon

TO T2B2

T OT2B 1

W Y-LRS

BH -LR SBH -W Y

BH -B HB

N to SUtaH

SolutionsTop Congested Paths

10 2013 Case

48 4850 50 48 4850 50

50 4950 49

47 4648 47

49 48 48 4748 47 48 47

50 5050 49 44 46

46 47

51 5050 48 41 41 40 40

52 51 47 46 47 4649 49 39 39

47 46

29 29 35 3551 51 48 48 48 46 40 3950 50 46 46

49 4152 53 49 48 49 4952 52 49 48

43 4247 46

47 4747 47 44 44

47 4750 5250 51 47 47 45 43

48 48 47 4647 4847 48

53 5453 54

52 5752 56

48 4748 47 48 47

54 53 49 4754 52

48 4748 47

BC Hydro

Montana- West

Broadview

West of Colstrip

Yellowtail

Idaho- West

Goshen

Jim Bridger

Utah- North

Utah- South

IPP

Bonanza

Colorado- West

Colorado- East

Laramie RiverSW Wyoming

C Wyoming

N Wyoming (BHB) Black Hills

Aquila

LADWP

San Diego

SOCOLIF

PG & E

Northwest

ArizonaNew Mexico

Nevada

Sierra

WAPA L.C.

Mexico C

Imperial

AlbertaAlbertaLMP Prices

Average Annual

Load LMP Generation LMP

Alternative 1- No Tx Additions

Alternative 1- w/ Tx Additions

11 2013 Case

Change in Congestion/Congestion Costs with Tx SolutionsAlternative 1

Interface Location[Direction]

Current Forward

limit (MW)

Current Reverse

limit (MW)

Opportunity cost of next $/MW

% hours congested

W/OTx

W/Tx

W/OTx

W/Tx

TOT 2C S.W Utah to S.E. Nevada [N – S]

300 300 77,804 67,791 40% 37%

Bridger West S.W. Wyoming to S.E. Idaho & to Northwest [E – W]

2,200 N/A 60,978 0 28% 0%

West of Naughton S.W. Wyoming to N Utah [E – W]

920 N/A 39,533 1,371 13% 0%

Path C N Utah/ S Idaho [S – N] 1,000 1,000 19,909 3,649 6%* 2%

Bonanza West N.E. Utah to Central Utah [N – S]

785 N/A 17,659 18,177 8% 10%

SW Wyoming to Bonanza

S.W. Wyoming to N.E. Utah [N – S]

200 200 17,602 34,018 9% 13%

Idaho to Montana E. Idaho to W. Montana[S – N]

337 337 4,741 23,429 1% 3%

* Reaches seasonal capacity of 750 MW

Opportunity Cost: the cost of delivering the next 1 MW of power to a particular location, or the savings from reducing load by 1 MW at that location (sometimes called shadow price)

12 2013 Case

Western Interconnect Impact for 2013Alternative 1

Interface limitation

Annual VOM ($000)

Delta from Base Annual VOM ($000)

Annual average LMP Delta from base annual average

LMPLoad

($/MWh)Generator ($/MWh)

Load ($/MWh)

Generator ($/MWh)

w/o Transmission Additions

20,069,399 49.87 48.54

All interfaces unconstrained

19,825,590 (243,809) 49.38 49.38 (.49) .84

Only internal RM interfaces are unconstrained

19,986,953 (82,446) 49.96 49.22 .09 .68

With Transmission Additions

20,017,760 (51,639) 49.93 49.15 .06 .61

Adjusted 2008 Base Case

24,641,043 4,571,644 N/A N/A N/A N/A


Alternative 2Iteration 2

14 2013 Case

RUN 1: Reno to DJ to LRS to Cheyenne to Ault to Green Valley 345 line (TOT 3) Bridger to Midpoint 345 line via Treasureton) (Bridger West) Miners to Cheyenne 345 line and Miners 345/230 transformer (TOT 4A) Miners to Bridger 345 and Miners 345/230 transformer. 230 Midpoint to Boise

RUN 2: (Add to Run 1): Reno to LRS to Ault to Green Valley 345 line (if TOT 3 still a problem) Bridger to Naughton to Ben Lomond 345 line (if Bridger West or Naughton West still a

problem)

RUN 3: (Add to Run 1 plus Run 2): Colstrip to Reno 345kV Colstrip: 2 - 345/230 kV Transformers to integrate generation Reno 345/230 Transformer to integrate generation Treasureton to Ben Lomond 345kV (if Path C overloaded) Loop Bridger to Midpoint at Treasureton Loop Borah Ben Lomond at Treasureton

Transmission Additions – Alternative 2

15 2013 Case

NELWAY

BRIDGER(2240 M W)

COLSTRIP(2280 M W)

GOSHEN

BORAH

KINPORT

M IDPOINT

TAFT

GARRISON

DW ORSHAK(476 M W)

TOW NSENDBROADVIEW

BELL

BENLOMOND

NAUG HTON(723 M W )

ANACONDA

ATLANTICCITY

ROCKSPRING S

M ONUM ENT

MUSTANG

SPENCE

BR ID G ERW EST

T OT 4A

W EST O FBR OADVIEW

BILLINGS

Y ELLOWTAIL

CUSTER

GREATFALLS

OVANDO

HOTSPRINGS

CABGORGE

(230 M W)NOXON

(561 M W)

LOLO


OXBOW(220 M W )

BROWNLEE(730 M W )

BOISE

HATWAI

MOSCOW

BENEW AH

RIVERTON

BUFFALO

OREGONBAS IN

THERM OPOLIS

WY ODAK(375 M W )

CASPER

SHERIDAN

PLATTE


M ILES CITYDC T IE

CALDWELL

WANETA

BOR AHW EST

TERMINAL

M ONA


90SOUTHCAM P

WILLIAM S

BONANZA(425 M W )

HUNTINGTON(894 M W)

SIGURD

IPP(1800 M W)

GONDER

HARRYALLEN

M ACHACEK

PAVANTHUNTER

(1341 M W)


HUMBOLDT


CROSS-OVER


AM PS

IDAHO -M O NT AN A

JEFFER SON

DILLONPETERSONFLATS

IDAHO -SIERR A

BR O W N LEEEAST

T O T 4B

BON ANZAW ES T

IPPDC


IPP -M O NA

IPP -G ON DE R

LIBBY(632 M W)


W EST OFH AT W AI

COLO

MONTANA

W YOIDAHO

UTAH

PAT H C

CRAIG(1224 M W)

SAN JUAN(1798 M W)

HAYDEN(488 M W)

LARAM IERIVER

ARCHER

AULT

RIFLE

M ONTROSE

PINTO

CURECANTI

T O T2C

T OT2B

T OT2A

T O T1A

PONCHA

TO T3

SIDNEY

STORY

L E G E N D:

500KV

+-500KVDC

345KV230KV115-161KV

LANGE

WESTHILL

STEGAL

COM ANCHE(725 M W)

M IDWAY

DANIELS PARKM ALTA

SMOKY HILL

PAWNEE(530 M W)

VALM ONT

DILLON

REDBUTTE


T O T 7



FLAM INGGORGE

TREASURETON


MT - SE

NLE W IS TO N

Lam ar

T OT 5

Falcon

TO T2B2

T OT2B 1

W Y-LRS

BH -LR SBH -W Y

BH -B HB

N to SUtaH

Relieving Transmission ConstraintsAlternative 2

SolutionsTop Congested Paths

16 2013 Case

LMP PricesAverage Annual

Load LMP Generation LMP

Alternative 2- no Tx addition

Alternative 2- w/ Tx additions

48 4850 50 48 4850 51

50 4951 49

29 2539 38

47 46 27 2648 47 38 37

50 4950 50 28 28

40 40

50 4849 48 27 25 35 34

50 49 42 40 44 4348 48 24 16

43 41

25 25 30 2350 50 46 46 45 43 24 2249 50 43 42

48 3952 53 49 49 48 4752 52 49 48

42 4246 45

47 4747 47 49 49

45 4650 5150 51 48 47 46 44

47 47 46 4447 4847 48

53 5453 54

52 5752 57

48 4748 47 49 47

54 53 49 4754 53

48 4748 47

BC Hydro

Montana- West

Broadview

West of Colstrip

Yellowtail

Idaho- West

Goshen

Jim Bridger

Utah- North

Utah- South

IPP

Bonanza

Colorado- West

Colorado- East

Laramie RiverSW Wyoming

C Wyoming

N Wyoming (BHB) Black Hills

Aquila

LADWP

San Diego

SOCOLIF

PG & E

Northwest

ArizonaNew Mexico

Nevada

Sierra

WAPA L.C.

Mexico C

Imperial

AlbertaAlberta

17 2013 Case


Current Forward

limit (MW)

Current Reverse

limit (MW)

Opportunity cost of next

$/MW

% hours congested

W/OTx

W/Tx

W/OTx

W/Tx

C. Wyoming to Black Hills

C. Wyoming to N.E. Wyoming [SE – NE]

332 332 265,617 21,220 84% 9%

TOT 3 S.E. Wyoming to N.E. Colorado [N – S]

1,424 N/A 238,969 9,213 76% 10%


2,200 N/A 228,819 35 73% 0%

West of Broadview South Central Montana[E – W]

2,573 N/A 172,681 98,499 51% 36%

West of Naughton S.W. Wyoming to N Utah [E – W]

920 N/A 97,736 16,138 32% 6%

TOT 2C S.W Utah to S.E. Nevada [N – S]

300 300 57,830 82,759 31% 31%

Montana to Northwest W. Montana to E. Washington [E – W]

2,200 1,350 24,361 28,493 8% 11%

Idaho to Montana E. Idaho to W. Montana [S – N]

337 337 45,982 26,974 4% 2%

Change in Congestion/Congestion Costs with Tx SolutionsAlternative 2

18 2013 Case


Interface limitation Annual

VOM

($000)

Delta from Base

Annual VOM ($000)

Annual average LMP

Delta from base annual average

LMP

Load ($/MWh

Generator ($/MWh)

Load ($/MWh)

Generator ($/MWh)

w/o Transmission Additions

20,075,091

49.81 47.54


19,653,573

(421,513) 49.41 49.41 (.40) 1.87


19,846,737

(228,354) 49.77 48.78 (.04) 1.24

With Transmission Additions

19,850,473

(224,618) 49.80 48.70 (.01) 1.16

Adjusted 2008 Base Case 24,641,043

4,565,952 N/A N/A N/A N/A


Alternatives 3 & 4Iteration 1

20 2013 Case

NELWAY

BRIDGER(2240 M W)

COLSTRIP(2280 M W)

GOSHEN

BOR AH

KINPORT

MIDPOINT

TAFT

GARRISON

DWORSHAK(476 M W)

TOW NSENDBROADVIEW

BELL

BENLOM OND

NAUGHTON(723 M W)

ANACONDA

ATLANTICCITY

ROCKSPRINGS

M ONUM ENT

M USTANG

SPENCE

BR ID G ERW E ST

T OT 4A

W ES T OFBR OADVIE W

BILLINGS

Y ELLOW TAIL

CUSTER

GREATFALLS

OVANDO

HOTSPRINGS

CABGORGE

(230 M W)NOXON

(561 M W)

LOLO

HELLSCANY ON(450 M W )

OXBOW(220 M W)

BROWNLEE(730 M W)

BOISE

HATW AI

M OSCOW

BENEWAH

RIVERTON

BUFFALO

OREGONBASIN

THERM OPOLIS

WY ODAK(375 M W)

CASPER

SHERIDAN

PLATTE


MILES CITYDC TIE

CALDWELL

WANETA

BO RAHW EST

TERM INAL

M ONA


90SOUTHCAM P

W ILLIAM S

BONANZA(425 M W)

HUNTINGTON(894 M W)

SIGURD

IPP(1800 M W)

GONDER

HARRYALLEN

MACHACEK

PAVANTHUNTER

(1341 M W)

TO ADELANTO GLENCANY ON

HUM BOLDT

M O NT ANA TONO RT HW EST

CROSS-OVER

W EST OFCRO SSO VER

AMPS

ID AHO -M ON T ANA

JEFFERSON

DILLONPETERSONFLATS

IDAHO -SIER RA

BR OW NLE EEAST

T O T 4B

BO NAN ZAW EST

IPPDC

PAV AN T -G OND ER &IPP-GO N DER

IP P -M ON A

IPP-G O ND ER

LIBBY(632 M W)


W EST OFHAT W AI

COLO

MONTANA

W YOIDAHO

UTAH

PAT H C

CRAIG(1224 M W)

SAN JUAN(1798 M W)

HAY DEN(488 M W)

LARAM IERIVER

ARCHER

AULT

RIFLE

MONTROSE

PINTO

CURECANTI

T OT2C

T OT2B

T O T2A

T O T1A

PONCHA

T OT3

SIDNEY

STORY

L E G E N D:

500KV

+-500KVDC

345KV230KV115-161KV

LANGE

WESTHILL

STEGAL

COMANC HE(725 M W)

M IDWAY

DANIELS PARKM ALTA

SMOKY HILL

PAWNEE(530 M W)

VALM ONT

DILLON

REDBUTTE

SO UT H O FYELLO W T AIL

T O T 7

M ON T ANA T OW YO M ING

SW W YOM IN GTO B O NANZA

FLAM INGGORGE

TREASURETON

W EST OFCO LST R IP

M T - S E

NLE W IST O N

Lamar

T OT 5

Fa lcon

T OT2B 2

TO T2B1

W Y -LR S

BH-LRSBH -W Y

BH -BHB

N to SUtaH

Top Congested Paths

Transmission Constraints - Alternative 3(w/o new transmission)

21 2013 Case

Transmission Congestion/Congestion CostsAlternative 3


Forward limit

(MW)

Reverse limit

(MW)

Opportunity cost of next

MW

% hours congested

Black Hills to C Wyoming E. Wyoming to C. Wyoming [E – W]

332 332 274,854 99%


2,200 N/A 244,743 83%

PAVANT, INTRMTN - GONDER 230 KV

C. Utah to C. Nevada [E – W] 440 235 212,840 60%

TOT 2C S. Utah to S.E. Nevada [N – S] 300 300 193,873 46%

West of Broadview Central Montana [E – W] 2,573 N/A 181,721 60%

Montana to Northwest W. Montana to E. Washington 2,200 1,350 173,051 71%


1,424 N/A 136,470 50%

INTERMOUNTAIN - MONA 345 KV

Central Utah [W – E] 1,400 1,200 131,121 65%

Idaho to Montana E. Idaho to W. Montana [S – N] 337 337 65,054 6%

TOT 2B2 S. Utah to N. Arizona [N – S] 265 300 55,142 33%

SW of 4 Corners S.E. Utah to N.W. New Mexico [SE – NW]

2,325 N/A 41,112 16%

22 2013 Case



Annual VOM ($000)

Delta from Base

Annual VOM ($000)

Annual average LMP


LMP

Load ($/MW)

Generator ($/MW)

Load ($/MW)

Generator ($/MW)

Base Case 19,583,034 48.40 45.45


18,297,721 (1,285,313) 47.65 47.65 (.75) 2.20


18,814,479 (768,555) 46.55 45.00 (1.85) (.45)

2008 Base case (Adjusted)

24,641,043 (5,058,009) N/A N/A N/A N/A

23 2013 Case

NELWAY

BRIDGER(2240 M W)

COLSTRIP(2280 M W)

GOSHEN

BOR AH

KINPORT

MIDPOINT

TAFT

GARRISON

DWORSHAK(476 M W)

TOW NSENDBROADVIEW

BELL

BENLOM OND

NAUGHTON(723 M W)

ANACONDA

ATLANTICCITY

ROCKSPRINGS

M ONUM ENT

M USTANG

SPENCE

BR ID G ERW E ST

T OT 4A

W ES T OFBR OADVIE W

BILLINGS

Y ELLOW TAIL

CUSTER

GREATFALLS

OVANDO

HOTSPRINGS

CABGORGE

(230 M W)NOXON

(561 M W)

LOLO

HELLSCANY ON(450 M W )

OXBOW(220 M W)

BROWNLEE(730 M W)

BOISE

HATW AI

M OSCOW

BENEWAH

RIVERTON

BUFFALO

OREGONBASIN

THERM OPOLIS

WY ODAK(375 M W)

CASPER

SHERIDAN

PLATTE


MILES CITYDC TIE

CALDWELL

WANETA

BO RAHW EST

TERM INAL

M ONA


90SOUTHCAM P

W ILLIAM S

BONANZA(425 M W)

HUNTINGTON(894 M W)

SIGURD

IPP(1800 M W)

GONDER

HARRYALLEN

MACHACEK

PAVANTHUNTER

(1341 M W)

TO ADELANTO GLENCANY ON

HUM BOLDT

M O NT ANA TONO RT HW EST

CROSS-OVER

W EST OFCRO SSO VER

AMPS

ID AHO -M ON T ANA

JEFFERSON

DILLONPETERSONFLATS

IDAHO -SIER RA

BR OW NLE EEAST

T O T 4B

BO NAN ZAW EST

IPPDC

PAV AN T -G OND ER &IPP-GO N DER

IP P -M ON A

IPP-G O ND ER

LIBBY(632 M W)


W EST OFHAT W AI

COLO

MONTANA

W YOIDAHO

UTAH

PAT H C

CRAIG(1224 M W)

SAN JUAN(1798 M W)

HAY DEN(488 M W)

LARAM IERIVER

ARCHER

AULT

RIFLE

MONTROSE

PINTO

CURECANTI

T OT2C

T OT2B

T O T2A

T O T1A

PONCHA

T OT3

SIDNEY

STORY

L E G E N D:

500KV

+-500KVDC

345KV230KV115-161KV

LANGE

WESTHILL

STEGAL

COMANC HE(725 M W)

M IDWAY

DANIELS PARKM ALTA

SMOKY HILL

PAWNEE(530 M W)

VALM ONT

DILLON

REDBUTTE

SO UT H O FYELLO W T AIL

T O T 7

M ON T ANA T OW YO M ING

SW W YOM IN GTO B O NANZA

FLAM INGGORGE

TREASURETON

W EST OFCO LST R IP

M T - S E

NLE W IST O N

Lamar

T OT 5

Fa lcon

T OT2B 2

TO T2B1

W Y -LR S

BH-LRSBH -W Y

BH -BHB

N to SUtaH

Top Congested Paths

Transmission Constraints - Alternative 4(w/o new transmission)

24 2013 Case


Forward limit (MW)

Reverse limit (MW)

Opportunity cost of next MW

% hours congested


2,200 N/A 273,329 96%

Montana to Northwest W. Montana to E. Washington 2,200 1,350 253,687 79%

Black Hills to C Wyoming

E. Wyoming to C. Wyoming [E – W] 332 332 176,302 79%+

TOT 2C S. Utah to S.E. Nevada [N – S] 300 300 154,151 43%

West of Broadview Central Montana [E – W] 2,573 N/A 130,392 42%

Bonanza West E. Utah to C. Utah [E – W] 785 N/A 120,829 59%


1,424 N/A 102,056 56%

Idaho to Montana E. Idaho to W. Montana [S – N] 337 337 99,677 8%

TOT 2A S.W. Colorado [N – S] 690 N/A 97,253 50%

IPP DC C. Utah to S. California [NE – SW] 1,920 300 76,879 85%

TOT 1A W. Colorado to E. Utah [E – W] 650 N/A 64,263 59%

West of Naughton S.E. Wyoming to N. Utah [E – W] 920 N/A 47,928 20%

SW of 4 Corners S.E. Utah to N.W. New Mexico [SE – NW]

2,325 N/A 36,863 15%

TOT 2B2 S. Utah to N. Arizona [N – S] 265 300 32,405 23%

Transmission Congestion/Congestion CostsAlternative 4

25 2013 Case



Annual VOM ($000)

Delta from Base

Annual VOM ($000)

Annual average LMP


LMP

Load ($/MW)

Generator ($/MW)

Load ($/MW)

Generator ($/MW)

Base Case 18,694,873 46.85 43.81


16,609,281 (2,085,592) 45.71 45.71 (1.14) 1.90


18,136,071 (558,802) 45.00 42.43 (1.85) (1.38)

2008 Base case (Adjusted)

24,641,043 (5,946,170) N/A N/A N/A N/A

Documents

March 4, 2004