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.

146 constraints tracked · registry updated 2026-07-29

Internal grid constraints

Transmission lines, transformers, operating nomograms, and outage-driven limits inside CAISO.
MIDWAY – BELRDG J 115 kV (ckt 1)7 binding$3910.24
7690-COOLWATER_KRAMER_IM_NG97 binding$-1478.96
AEC_TP1 – TESLA 115 kV (ckt 1)156 binding$1448.40
SC21ATP – ARVIN 70.0 kV (ckt 1)122 binding$1434.65
MIDWAY – VINCENT 500 kV (ckt 2)254 binding$1400.81
KINGSBRG – CONTADNA 115 kV (ckt 1)110 binding$1307.33
CRWCRKSS – CRWS LDS 60.0 kV (ckt 1)36 binding$1274.28
INYOKN nomogram204 binding$-1250.73
CORTINA 60.0/1.0 kV transformer (bank 1)7 binding$1188.84
SN JSE A – EL PATIO 115 kV (ckt 1)4 binding$1155.63
HENTAP1 – MUSTANGS 230 kV (ckt 1)6 binding$1095.50
EL CAJON – LOSCOCHS 69.0 kV (ckt 1)516 binding$1069.71
DTCH FL1 – CHCGO PK 115 kV (ckt 1)11 binding$1018.03
22020- 23497 AVOCDO-FALBRK_69_BR_1_14 binding$962.65
USWP-JRW – CAYETANO 230 kV (ckt 1)1 binding$839.22
BAKRSFLD – MAGUNDEN 70.0 kV (ckt 1)13 binding$809.93
LOSBANOS – PANOCHE 230 kV (ckt 2)139 binding$703.85
MOSSLD – LASAGUIL 230 kV (ckt 1)121 binding$689.61
MCSWAINJ – MRCDFLLS 70.0 kV (ckt 1)72 binding$634.31
CLER LKE – KONOCTI6 60.0 kV (ckt 1)95 binding$549.12
HPLND JT – CLVRDLJT 60.0 kV (ckt 1)301 binding$532.27
LE GRAND – ADRA TAP 115 kV (ckt 1)377 binding$450.11
TL649A OVERLOAD nomogram109 binding$-390.41
CP6 nomogram52 binding$-385.46
PANOCHE – GATES 230 kV (ckt 1)21 binding$357.23
SUNCREST – SUNC TP2 230 kV (ckt 2)18 binding$322.17
USWP-WKR – SBTAP 60.0 kV (ckt 1)472 binding$311.62
PANOCHE – GATES 230 kV (ckt 2)45 binding$292.62
TL23040 IV SPS nomogram11 binding$-285.21
WARNERVL – WILSON 230 kV (ckt 1)43 binding$267.02
ULTPWRJ – AIRPROD 115 kV (ckt 1)2 binding$242.15
CERTANJ2 – LE GRAND 115 kV (ckt 1)37 binding$240.51
FINKSS – WSTLYTID 230 kV (ckt 1_1)16 binding$237.18
OMS_20655865_CRVR_NG26 binding$-233.10
KRAMER – VICTOR 230 kV (ckt 2)202 binding$224.81
DRUM – BRNSWKT2 115 kV (ckt 2)30 binding$197.45
LOCKEFRD – LODI JCT 60.0 kV (ckt 1)3 binding$197.40
KETTLEMN – GATES 70.0 kV (ckt 1)306 binding$193.61
BELDENTP – TABLMTN 230 kV (ckt 1)21 binding$184.09
SNJQJCT – GFFNJCT 70.0 kV (ckt 1)328 binding$175.63
GATES2 – MIDWAY 500 kV (ckt 2)9 binding$164.30
PARDEE – PASTORIA 230 kV (ckt 1)22 binding$162.05
HGHLNDJ2 – CORTINA 115 kV (ckt 1)104 binding$157.97
LOCKEFRD – VICTOR 60.0 kV (ckt 1)13 binding$156.06
OMS_20387484 MG-BK81_NG28 binding$-152.97
Outage constraint TL230549 binding$-148.82
LOSBANOS – PADR FLT 230 kV (ckt 1)208 binding$147.58
WILSONAB – MERCED 115 kV (ckt 1)4 binding$138.21
ANTELOPE – WIRLWIND 500 kV (ckt 1)217 binding$128.91
MIGUEL 500/1.0 kV transformer (bank 80)23 binding$128.35
GRIZLYJ2 – SOBRANTE 115 kV (ckt 2)30 binding$124.29
EXCHEQUR – LE GRAND 115 kV (ckt 1)36 binding$113.74
TAFT – Q356TAP 70.0 kV (ckt 1)382 binding$108.17
DOUBLTTP – FRIARS 138 kV (ckt 1)2 binding$102.18
IBM-HR J – METCALF 115 kV (ckt 1)2 binding$99.70
NORTHERN – SCOTT 115 kV (ckt 2)24 binding$93.76
GLENCLIF – GLNCLFTP 69.0 kV (ckt 1)1 binding$92.63
PIT-ESH1 – E. SHORE 230 kV (ckt 1)2 binding$89.69
OMS_19695948_DEV_RDB_ALIS185 binding$-87.28
CARIBOU 115/1.0 kV transformer (bank 11)13 binding$86.13
NEWARK D – NORTHERN 115 kV (ckt 1)3 binding$84.23
COTTLE A – MELONES 230 kV (ckt 1)8 binding$77.13
TESLA – LOSBANOS 500 kV (ckt 1)4 binding$76.12
TL 230S OVERLOAD nomogram4 binding$-73.18
MESA CAL 500/13.8 kV transformer (bank 4H)4 binding$73.01
SALADO – STNSLSRP 60.0 kV (ckt 1)77 binding$69.98
HENRITTA 70.0/230 kV transformer (bank 4)334 binding$66.05
SN JSE A – SNJOSEB 115 kV (ckt 1)13 binding$64.25
MCSWAINJ – EXCHEQUR 70.0 kV (ckt 1)6 binding$62.39
PENDLETN – SANLUSRY 69.0 kV (ckt 1)6 binding$61.09
TL687_BREGGO_NAROWS9 binding$-57.27
ATWELL – SMYRNA 1 115 kV (ckt 1)162 binding$56.48
BAY BLVD – OTAY 69.0 kV (ckt 2)11 binding$55.39
VEAJAF – MERCURY 138 kV (ckt 1)1 binding$49.91
WIRLWIND 500/230 kV transformer (bank 4)9 binding$48.43
WINDHUB 230/500 kV transformer (bank 2)11 binding$48.15
GATES – CAFLTSSS 230 kV (ckt 1)9 binding$47.42
RVRBK TP – TULLOCH 115 kV (ckt 1)13 binding$47.25
Q484TP – BLACKWLL 70.0 kV (ckt 1)1 binding$41.19
BRNSWKT1 – DTCH2TAP 115 kV (ckt 1)1 binding$39.32
LS ESTRS – NORTECH 115 kV (ckt 1)4 binding$37.82
WARNERS – SANTYSBL 69.0 kV (ckt 1)8 binding$34.64
PANOCHE – KAMM 115 kV (ckt 1)86 binding$33.84
LPNJCTSS – GWF_HEP 115 kV (ckt 1)3 binding$31.17
KINGSBRG – FRWT TAP 115 kV (ckt 1)27 binding$29.69
VICTOR – ROADWAY 115 kV (ckt 1)5 binding$28.31
VC_TL_681B_import_NG36 binding$-28.05
WESTPARK – KERN PWR 115 kV (ckt 1)9 binding$23.46
LILAC – PALA 69.0 kV (ckt 1)11 binding$20.39
AEC_TP2 – TESLA 115 kV (ckt 1)2 binding$18.09
CURTISS – FBERBORD 115 kV (ckt 1)5 binding$17.12
MIDWAY – VINCENT 500 kV (ckt 1)1 binding$17.02
PSEMCKIT – BELRDG J 115 kV (ckt 1)3 binding$15.81
MURRAY – GARFIELD 69.0 kV (ckt 1)6 binding$14.93
ESCNDIDO – LILAC 69.0 kV (ckt 1)10 binding$12.74
CP1 nomogram23 binding$-12.29
REDBLUFF 230/500 kV transformer (bank 2)2 binding$12.22
SANGER – MC CALL 115 kV (ckt 3)1 binding$11.31
UKIAH – CITY UKH 115 kV (ckt 1)1 binding$7.35
WHITMORE – BEAR CRK 60.0 kV (ckt 1)1 binding$6.37
WHITMORE – OLSEN 60.0 kV (ckt 1)1 binding$6.31
ASH – ASH TP 69.0 kV (ckt 1)15 binding$4.34
RINCON – VALCNTR 69.0 kV (ckt 1)2 binding$2.15
SHARON T – OAKH_JCT 115 kV (ckt 1)1 binding$1.72
HAAS 13.8/230 kV transformer (bank 1)2 binding$1.13
GARFIELD – EL CAJON 69.0 kV (ckt 1)1 binding$1.07
BORDEN 70.0/230 kV transformer (bank 1)1 binding$0.03
CP6 nomogram0 binding$0.00
HUMBOLDT_EXP_NG0 binding$0.00

Intertie scheduling constraints

Limits on the paths connecting CAISO to neighbouring balancing authorities.
PATH_14159 binding$1487.44
Midpoint_West5 binding$1440.39
Line_GL-AFX_230KV8 binding$1220.66
EPE_NET_ITC384 binding$-1154.45
Line_DSN-FH_69KV24 binding$1000.00
WSTWGMEAD_ITC3 binding$-852.66
DOSMGO-PNOCHE_230_2_1111 binding$528.40
CLOVER_SIGURD_345_131 binding$470.23
LDWP_IPP_NORTH467 binding$-227.93
ATSO 345kV7 binding$114.47
JIMBRIDG 345|230 T64 binding$72.41
Line_NG-YMT_69KV2 binding$58.25
TEPC_BA_EXP_ITC118 binding$-50.19
TOTAL_WYOMING_EXPORT58 binding$44.48
MEAD_ITC26 binding$-42.25
PACE_FOURCORNE345_ITC74 binding$-41.49
NWMT_AMPS_EAST3 binding$-34.34
BPAT_NET_ITC7 binding$-33.18
IPPUTAH_ITC330 binding$-32.33
SRP_NET_ITC27 binding$-29.89
AZPS_NET_ITC5 binding$-29.06
NOB_ITC54 binding$-28.27
MALIN500_ISL36 binding$-25.15
PACE_PATHC_ITC9 binding$-23.55
TEPC_BA_IMP_ITC12 binding$-19.36
CLOVER_SIGURD_345_22 binding$19.02
MONAIPPDC_ITC40 binding$-18.64
WINDSTAR EXPORT TCOR1 binding$16.62
IPPDCADLN_ITC82 binding$-12.68
WECC_Path_413 binding$5.67
CASCADE_ITC10 binding$-5.60
PACW_CRAG_ITC7 binding$-1.37
IPCO_BORAHWEST_ITC0 binding$0.00
MERCHANT_ITC0 binding$0.00
NORTHGILA500_ITC0 binding$0.00
PARKER_ITC0 binding$0.00
WALC_NVE_EXPORT_ITC0 binding$0.00
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