CAISO transmission constraints

Every congestion constraint Voltlas has observed in the CAISO market, ranked by the largest shadow price recorded. Internal constraints are lines, transformers, and operating nomograms inside the CAISO footprint; interties are the scheduling limits on paths to neighbouring grids. Each page shows live day-ahead and real-time values alongside observed binding history.

281 constraints tracked · registry updated 2026-09-05

Internal grid constraints

Transmission lines, transformers, operating nomograms, and outage-driven limits inside CAISO.
OTAY – OTAYLKTP 69.0 kV (ckt 1)23 binding$4016.62
PENDLETN – SANLUSRY 69.0 kV (ckt 1)69 binding$1250.37
MIDWAY – BELRDG J 115 kV (ckt 1)13 binding$3910.24
SANYSDRO – OTAY TP 69.0 kV (ckt 1)6 binding$3800.63
WESTPARK – KERN PWR 115 kV (ckt 1)30 binding$192.26
INYOKN nomogram466 binding$-1544.32
SC21ATP – ARVIN 70.0 kV (ckt 1)303 binding$3016.00
BORDER – OL649 69.0 kV (ckt 1)4 binding$2591.62
AEC_TP1 – TESLA 115 kV (ckt 1)290 binding$1402.43
115kv ML14 binding$2074.64
EL CAJON – LOSCOCHS 69.0 kV (ckt 1)642 binding$1842.38
NORTECH – NORTHERN 115 kV (ckt 1)3 binding$1514.99
7690-COOLWATER_KRAMER_IM_NG144 binding$-1259.69
SylmarBNK N-S Import nomogram1 binding$-1481.26
NWARK EF 115/230 kV transformer (bank 11)15 binding$1475.97
MESA CAL – LAGUBELL 230 kV (ckt 2_1)72 binding$1470.34
MC FRLND – WASCO 70.0 kV (ckt 1)41 binding$1325.25
CERTANJ2 – LE GRAND 115 kV (ckt 1)119 binding$1116.36
MIDWAY – VINCENT 500 kV (ckt 2)215 binding$336.08
TL649A OVERLOAD nomogram239 binding$-1000.00
J.HINDS2 – MIRAGE 230 kV (ckt 1)18 binding$1348.67
LS ESTRS – NORTECH 115 kV (ckt 1)96 binding$1323.03
KINGSBRG – CONTADNA 115 kV (ckt 1)280 binding$1193.94
BAY BLVD – OTAY 69.0 kV (ckt 2)39 binding$1300.80
CRWCRKSS – CRWS LDS 60.0 kV (ckt 1)19 binding$187.25
DRUM – BRNSWKT2 115 kV (ckt 2)51 binding$1273.26
CORTINA 60.0/1.0 kV transformer (bank 1)2 binding$22.52
DOUBLTTP – FRIARS 138 kV (ckt 1)66 binding$1162.15
SN JSE A – EL PATIO 115 kV (ckt 1)7 binding$1155.63
LE GRAND – ADRA TAP 115 kV (ckt 1)477 binding$915.67
HENTAP1 – MUSTANGS 230 kV (ckt 1)5 binding$68.10
CLER LKE – KONOCTI6 60.0 kV (ckt 1)17 binding$415.20
SANGER – MC CALL 115 kV (ckt 3)19 binding$664.04
NEWARK D – NORTHERN 115 kV (ckt 1)40 binding$1051.38
DTCH FL1 – CHCGO PK 115 kV (ckt 1)4 binding$18.06
PARDEE – PASTORIA 230 kV (ckt 1)5 binding$999.46
AVCADOTP – AVOCADO 69.0 kV (ckt 1)30 binding$969.08
J.HINDS – J.HINDS2 230 kV (ckt 1)1 binding$965.55
22020- 23497 AVOCDO-FALBRK_69_BR_1_11 binding$2.43
GWFTRACY – LAMMERS 115 kV (ckt 1)1 binding$962.02
HPLND JT 60.0/115 kV transformer (bank 2)32 binding$958.46
KONOCTI6 – EGLE RCK 60.0 kV (ckt 1)12 binding$944.78
MOSSLD – LASAGUIL 230 kV (ckt 1)146 binding$683.37
HPLND JT – CLVRDLJT 60.0 kV (ckt 1)790 binding$820.28
BAKRSFLD – MAGUNDEN 70.0 kV (ckt 1)5 binding$844.97
USWP-JRW – CAYETANO 230 kV (ckt 1)1 binding$839.22
CP6 nomogram37 binding$-166.32
TL 230S OVERLOAD nomogram225 binding$-757.09
TL23040 IV SPS nomogram43 binding$-370.03
LOSBANOS – PANOCHE 230 kV (ckt 2)133 binding$572.34
BAY BLVD – IMPRLBCH 69.0 kV (ckt 1)33 binding$421.67
OMS IV-ML OUTAGE_NG13 binding$-669.52
MCSWAINJ – MRCDFLLS 70.0 kV (ckt 1)42 binding$474.50
CURTISS – FBERBORD 115 kV (ckt 1)14 binding$598.74
MELROSE – MELRSETP 69.0 kV (ckt 1)10 binding$587.38
NWARK EF 115/230 kV transformer (bank 7)2 binding$549.61
RAVENSWD – PLO ALTO 115 kV (ckt 1)1 binding$500.26
DS AMIGO – PANOCHE 230 kV (ckt 1)50 binding$278.37
NWARK EF – ZNKER J2 115 kV (ckt 1)13 binding$389.60
MCSWAINJ – EXCHEQUR 70.0 kV (ckt 1)2 binding$81.22
PANOCHE – GATES 230 kV (ckt 1)58 binding$251.51
PANOCHE – GATES 230 kV (ckt 2)20 binding$66.10
POMERADO – SYCAMORE 69.0 kV (ckt 2)24 binding$83.27
SUNCREST – SUNC TP2 230 kV (ckt 2)20 binding$182.40
TABLMTN – PALERMO 230 kV (ckt 1)2 binding$320.51
BORDEN – CASSIDY 70.0 kV (ckt 1)14 binding$189.26
USWP-WKR – SBTAP 60.0 kV (ckt 1)339 binding$138.84
22357_IV PFC1 _230_22358_IV PFC _230_PS_11 binding$311.50
KRAMER – VICTOR 230 kV (ckt 2)343 binding$300.95
LOSCOCHS – SANTEE 138 kV (ckt 1)37 binding$274.36
WARNERVL – WILSON 230 kV (ckt 1)2 binding$39.22
ULTPWRJ – AIRPROD 115 kV (ckt 1)11 binding$251.79
VICTOR – LUGO 230 kV (ckt 4)73 binding$250.74
KRN OL J – MAGUNDEN 115 kV (ckt 1)25 binding$22.10
SYCAMORE – CHCARITA 138 kV (ckt 1)5 binding$243.71
EXCHEQUR – LE GRAND 115 kV (ckt 1)89 binding$239.14
FINKSS – WSTLYTID 230 kV (ckt 1_1)6 binding$44.00
OMS_20655865_CRVR_NG26 binding$-233.10
MISSION – CARLTNHS 138 kV (ckt 1)3 binding$221.25
HENRITTA 70.0/230 kV transformer (bank 4)179 binding$68.76
MIRAMAR – SCRIPPS 69.0 kV (ckt 1)9 binding$211.41
MORAGA – STATIN X 115 kV (ckt 3)7 binding$209.36
KETTLEMN – GATES 70.0 kV (ckt 1)325 binding$200.35
MELNS JB – VLYHMTP1 115 kV (ckt 1)3 binding$198.28
LOCKEFRD – LODI JCT 60.0 kV (ckt 1)9 binding$71.93
LRDO JCT – KERN OIL 115 kV (ckt 1)5 binding$196.26
SN JSE A – SNJOSEB 115 kV (ckt 1)54 binding$194.69
Outage constraint TL230548 binding$-191.14
GARDNER – MARICOPW 70.0 kV (ckt 1)133 binding$190.58
NORTHERN – SCOTT 115 kV (ckt 2)97 binding$183.68
BELDENTP – TABLMTN 230 kV (ckt 1)24 binding$184.09
LOCKEFRD – VICTOR 60.0 kV (ckt 1)21 binding$181.68
SNJQJCT – GFFNJCT 70.0 kV (ckt 1)389 binding$169.35
SUNCREST 230/500 kV transformer (bank 2)56 binding$170.57
TAFT – Q356TAP 70.0 kV (ckt 1)375 binding$170.39
DELTAPMP – ALTM MDW 230 kV (ckt 1)5 binding$169.99
GATES2 – MIDWAY 500 kV (ckt 2)27 binding$59.29
MESA CAL 500/13.8 kV transformer (bank 2H)7 binding$161.80
KINGSBRG – FRWT TAP 115 kV (ckt 1)29 binding$35.81
HGHLNDJ2 – CORTINA 115 kV (ckt 1)43 binding$51.21
BORDEN – GREGG 230 kV (ckt 2)14 binding$155.96
OMS_20387484 MG-BK81_NG28 binding$-152.97
VEAJAF – MERCURY 138 kV (ckt 1)44 binding$51.37
CARIBOU 115/1.0 kV transformer (bank 11)47 binding$152.18
IMPRLVLY 230/500 kV transformer (bank 81)27 binding$150.94
SYCAMORE 138/230 kV transformer (bank 1)6 binding$77.33
MIDWAY – WIRLWIND 500 kV (ckt 1)98 binding$70.77
LOSBANOS – PADR FLT 230 kV (ckt 1)99 binding$121.08
WILSONAB – MERCED 115 kV (ckt 1)8 binding$119.07
SANDY – GAMEBIRD 138 kV (ckt 1)11 binding$133.97
7510-PAR-PAS-OOS_NG66 binding$-133.10
OMS_19695948_DEV_RDB_ALIS541 binding$-131.45
ANTELOPE – WIRLWIND 500 kV (ckt 1)18 binding$87.84
MIGUEL 500/1.0 kV transformer (bank 80)23 binding$128.35
ZNKER J1 – TRIMBLE 115 kV (ckt 1)6 binding$127.17
GRIZLYJ2 – SOBRANTE 115 kV (ckt 2)33 binding$124.29
MIGUEL_BKs_MXFLW_NG11 binding$-121.95
NWARK EF – NORTHERN 115 kV (ckt 2)26 binding$118.26
MIDWAY – VINCENT 500 kV (ckt 1)1 binding$29.35
CP6 nomogram5 binding$-103.58
ADCC – NEWARK 230 kV (ckt 2)1 binding$102.30
IBM-HR J – METCALF 115 kV (ckt 1)2 binding$99.70
MIDWAY – VINCENT 500 kV (ckt 1)191 binding$96.71
MEADISO – MEAD S 230 kV (ckt PR_1)7 binding$93.69
GLENCLIF – GLNCLFTP 69.0 kV (ckt 1)1 binding$92.63
PIT-ESH1 – E. SHORE 230 kV (ckt 1)2 binding$89.69
SALADO – STNSLSRP 60.0 kV (ckt 1)116 binding$70.83
VC_TL_681B_import_NG52 binding$-77.49
PANOCHE – KAMM 115 kV (ckt 1)128 binding$77.41
COTTLE A – MELONES 230 kV (ckt 1)8 binding$77.13
TESLA – LOSBANOS 500 kV (ckt 1)2 binding$0.14
BRNSWKT1 – DTCH2TAP 115 kV (ckt 1)12 binding$75.38
MESA CAL 500/13.8 kV transformer (bank 4H)4 binding$73.01
POE – RIO OSO 230 kV (ckt 1)2 binding$72.59
MC CALL 230/115 kV transformer (bank 1)1 binding$70.77
VICTOR – ROADWAY 115 kV (ckt 1)7 binding$63.07
ATWELL – SMYRNA 1 115 kV (ckt 1)12 binding$29.54
COWCREEK – DESCHTP1 60.0 kV (ckt 1)12 binding$38.97
PINE FLT – MC CALL 230 kV (ckt 1)31 binding$66.65
NEENACH – TAP 85 66.0 kV (ckt 1)41 binding$27.83
TL687_BREGGO_NAROWS2 binding$-4.69
OMS_20616030_SERRANO-VALLEY_NG10 binding$-56.59
MURRAY – GARFIELD 69.0 kV (ckt 1)14 binding$54.70
DEVERS 500/230 kV transformer (bank 1)11 binding$54.01
GATES – CAFLTSSS 230 kV (ckt 1)11 binding$49.83
MIGUEL 230/500 kV transformer (bank 81)13 binding$52.41
JHINDS CP2 nomogram0 binding$0.00
COWCREEK – BEAR CRK 60.0 kV (ckt 1)7 binding$51.28
WIRLWIND 500/230 kV transformer (bank 4)12 binding$48.43
WINDHUB 230/500 kV transformer (bank 2)16 binding$36.78
RVRBK TP – TULLOCH 115 kV (ckt 1)13 binding$47.25
HUMBOLDT_EXP_NG43 binding$-45.40
LPNJCTSS – GWF_HEP 115 kV (ckt 1)3 binding$45.27
CHWCHLLA – CERTANJ2 115 kV (ckt 1)5 binding$16.33
Q484TP – BLACKWLL 70.0 kV (ckt 1)13 binding$30.07
GATES1 – MIDWAY 500 kV (ckt 1)39 binding$39.91
LILAC – PALA 69.0 kV (ckt 1)78 binding$22.74
REDBLUFF 230/500 kV transformer (bank 2)8 binding$37.40
CP5 nomogram63 binding$-36.84
UKIAH – CITY UKH 115 kV (ckt 1)4 binding$35.13
ARCO – AZALEA 70.0 kV (ckt 1_1)7 binding$34.67
WARNERS – SANTYSBL 69.0 kV (ckt 1)22 binding$34.64
GRANITE – HPLND JT 60.0 kV (ckt 1)1 binding$34.15
KIFER – FMC 115 kV (ckt 1)3 binding$33.25
CP1 nomogram33 binding$-26.02
LOS BANS 70.0/230 kV transformer (bank 3)1 binding$31.62
MORHILTP – MELROSE 69.0 kV (ckt 1)24 binding$31.51
7510-PAS-BAI-PAR-OOS_NG1 binding$-30.33
SAN EMDO – OLD RIVR 70.0 kV (ckt 1)7 binding$27.54
CHENYT – PANOCHE 115 kV (ckt 1)6 binding$26.61
AUBRYTP – AUBERRY 70.0 kV (ckt 1)1 binding$26.13
NWK DIST – LS ESTRS 230 kV (ckt 1)7 binding$25.85
7510-Pastoria-Pardee_NG1 binding$-25.11
SMYRNA 2 – SEMITRPJ 115 kV (ckt 1)7 binding$23.73
PAHRUMP – VISTA 138 kV (ckt 1)19 binding$22.86
BALCH – BALCH3TP 230 kV (ckt 1)3 binding$21.89
COTTNWD – ROUND MT 230 kV (ckt 3)5 binding$21.46
BARRE – VILLA PK 230 kV (ckt 1)4 binding$20.51
MONSRATE – MORHILTP 69.0 kV (ckt 1)2 binding$13.26
HAAS 13.8/230 kV transformer (bank 1)10 binding$15.39
AEC_TP2 – TESLA 115 kV (ckt 1)2 binding$18.09
ESCNDIDO – LILAC 69.0 kV (ckt 1)6 binding$16.23
PSEMCKIT – BELRDG J 115 kV (ckt 1)5 binding$16.05
WILSONAB 115/230 kV transformer (bank 1)4 binding$14.07
VALLEYVE – VALLEYTP 138 kV (ckt 1)10 binding$14.02
GARFIELD – EL CAJON 69.0 kV (ckt 1)4 binding$13.98
WHITMORE – OLSEN 60.0 kV (ckt 1)2 binding$12.79
SYCAMORE – SCRIPPS 69.0 kV (ckt 1)1 binding$12.07
MORAGA – STATIN X 115 kV (ckt 2)2 binding$11.22
BORDEN 70.0/230 kV transformer (bank 1)1 binding$10.92
MARICOPW – BSCL_PLD 70.0 kV (ckt 1)1 binding$10.09
COPUS – TAP SKRN 70.0 kV (ckt 1)1 binding$9.66
BAY BLVD – OTAY 69.0 kV (ckt 1)1 binding$9.05
HUMBOLDT_IMP_NG13 binding$-8.66
PALA – MNSRATTP 69.0 kV (ckt 1)2 binding$7.11
7760_DEV_RDB_ALIS4 binding$-6.95
ROSE CYN – CLARMTTP 69.0 kV (ckt 1)1 binding$6.75
WHITMORE – BEAR CRK 60.0 kV (ckt 1)1 binding$6.37
MUSTANGS – GATES 230 kV (ckt 2)1 binding$6.12
SN BRNRD – SC21ATP 70.0 kV (ckt 1)1 binding$5.06
ASH – ASH TP 69.0 kV (ckt 1)17 binding$4.34
PIT4 JT – ROUND MT 230 kV (ckt 2)1 binding$3.16
BSCL_PLD – COPUS 70.0 kV (ckt 1)1 binding$2.74
RIO OSO – BRNSWKT1 115 kV (ckt 1)1 binding$2.56
COLRIVER 230/500 kV transformer (bank 2)1 binding$2.27
RINCON – VALCNTR 69.0 kV (ckt 1)2 binding$2.15
SHARON T – OAKH_JCT 115 kV (ckt 1)1 binding$1.72
ARVIN – WEEDPTCH 70.0 kV (ckt 1)1 binding$0.91
HUMBOLDT_IMP_NG_300 binding$0.00

Intertie scheduling constraints

Limits on the paths connecting CAISO to neighbouring balancing authorities.
PATH_14161 binding$1487.44
WECC_Path_414 binding$1481.26
Midpoint_West5 binding$1440.39
YU XFMR2 A 69KV28 binding$1435.52
CAL-DRM_2 12029 binding$1434.62
Line_WAL-TH_69KV20 binding$1396.46
Line_GL-AFX_230KV8 binding$1220.66
EPE_NET_ITC122 binding$-170.79
CASCADE_ITC233 binding$-1000.00
Line_DSN-FH_69KV23 binding$981.04
PACW_CRAG_ITC266 binding$-1000.00
EPE_SNMIC_ITC23 binding$-956.40
CFE_ITC13 binding$-942.14
WSTWGMEAD_ITC6 binding$-855.77
NG XFMR4 A 69KV5 binding$789.69
DOSMGO-PNOCHE_230_2_11102 binding$760.52
PATH_757 binding$613.60
AMR-SND 13875 binding$554.85
CLOVER_SIGURD_345_131 binding$470.23
LDWP_IPP_NORTH893 binding$-327.82
PINALCENT500_ITC61 binding$-211.85
SUNZIA_ITC206 binding$-197.47
IPPUTAH_ITC627 binding$-191.45
WINDSTAR_YELLOWCA_2308 binding$154.66
ATSO 345kV7 binding$114.47
GWA_NET_ITC5 binding$-106.43
AMR XF#13 binding$90.43
NOB_ITC44 binding$-82.66
YU XFMR4 A 69KV1 binding$75.14
JIMBRIDG 345|230 T64 binding$72.41
Line_NG-YMT_69KV2 binding$71.70
MONAIPPDC_ITC118 binding$-65.79
NEVP_NET_ITC10 binding$-63.90
TOTAL_WYOMING_EXPORT24 binding$61.73
BPAT_NET_ITC7 binding$-51.96
TEPC_BA_EXP_ITC294 binding$-49.12
WINDSTAR EXPORT TCOR18 binding$49.16
MEAD_ITC29 binding$-42.81
PACE_FOURCORNE345_ITC57 binding$-15.80
PATH_173 binding$40.76
NWMT_AMPS_EAST0 binding$0.00
SRP_NET_ITC119 binding$-31.03
MALIN500_ISL33 binding$-30.50
AZPS_NET_ITC9 binding$-29.06
PACW_COI_IMPORT_ITC302 binding$-27.00
PACE_PATHC_ITC6 binding$-2.55
LADWP_NET_ITC43 binding$-21.46
TEPC_BA_IMP_ITC39 binding$-12.51
CLOVER_SIGURD_345_22 binding$19.02
IPCO_LAGRANDE_ITC12 binding$-17.26
IPPDCADLN_ITC193 binding$-12.59
TEPC_NET_ITC26 binding$-11.25
PACE_POPWEST_ITC16 binding$-10.46
BNK-1AAL1 binding$6.04
BMPR-RTSN1_A4 binding$3.51
PACW_COI_EXPORT_ITC108 binding$-3.27
PACW_COI_ITC15 binding$-1.35
BLYTHE_ITC0 binding$0.00
EQU AT-10 binding$0.00
HAY_STJ 10 binding$0.00
HAY_VEL 10 binding$0.00
Haynes_Total_Plant0 binding$0.00
IPCO_BORAHWEST_ITC0 binding$0.00
MERCHANT_ITC0 binding$0.00
NORTHGILA500_ITC0 binding$0.00
PALOVRDE_ITC0 binding$0.00
PARKER_ITC0 binding$0.00
SUMMIT_ITC0 binding$0.00
WALC_MEAD230_IMPORT_ITC0 binding$0.00
WALC_NET_EXPORT_ITC0 binding$0.00
WALC_NET_IMPORT_ITC0 binding$0.00
WALC_NVE_EXPORT_ITC0 binding$0.00
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