The Western Electricity Coordinating Council (WECC) coordinates a number of high voltage power links in western North America.[1][2][3] These links, known as WECC Intertie Paths, are not necessarily single transmission line, rather they are interties between various areas. These areas can be quite distant, such as Path 65 between The Dalles, Oregon and Los Angeles, California or short such as Path 62 between Southern California Edison's Eldorado and LADWP's McCullough substations. These are currently numbered from 1 to 81, with a few numbers intentionally omitted.
Since the interties may consist of multiple power-lines, the maximum voltage used is shown in the table below. Some of the links such as Path 65, the Pacific DC Intertie, do consist of a single transmission line, so the maximum voltage is the voltage used.
| Path # | Name | Path rating transfer limit (MW) | Normal power flow
direction |
Max voltage (kV) | |
|---|---|---|---|---|---|
| E to W (N to S)[4] | W to E (S to N) | ||||
| Path 1 | Alberta to BC | 1000 | 1200 | W to E | 500 |
| Path 2 | Alberta to Saskatchewan | 150 | 150 | E to W | DC/DC |
| Path 3 | Northwest to British Columbia | 3150 | 3000 | S to N | 500 |
| Path 4 | West of Cascades - North | 10700 | E to W | 500 | |
| Path 5 | West of Cascades - South | 7200 | E to W | 500 | |
| Path 6 | West of Hatwai | 4277 | E to W | 500 | |
| Path 8 | Montana to Northwest | 2200 | 1350 | E to W | 500 |
| Path 9 | West of Broadview | 2753 | Not Defined | E to W | 500 |
| Path 10 | West of Colstrip | 2598 | Not Defined | E to W | 500 |
| Path 11 | West of Crossover | 2598 | Not Defined | E to W | 500 |
| Path 14 | Idaho to Northwest | 2400 | 1200 | E to W | 500 |
| Path 15 | Midway - Los Banos | 2000-3265[5] | 4800-5400[5] | N to S | 500 |
| Path 16 | Idaho - Sierra | 500 | 360 | 345 | |
| Path 17 | Borah West | 2557 | 1600 | Not Defined | 345 |
| Path 18 | Montana to Idaho | 383 | 256 | N to S | 230 |
| Path 19 | Bridger West | 2400 | 1250 | E to W | 345 |
| Path 20 | Path C | 1600 | 1250 | S to N | 345 |
| Path 22 | Southwest of Four Corners | 2325 | Not Defined | E to W | 500 |
| Path 23 | Four Corners Transformer | N/A | N/A | N/A | 500 |
| Path 24 | PG&E - Sierra | 160 | 150 | 115 | |
| Path 25 | PacificCorp/PG&E 115 kV | 150 | 115 | ||
| Path 26 | Northern-Southern California | 4000 | 3000 | 500 | |
| Path 27 | IPP DC Line | 2400 | 1400 | N to S | 500 |
| Path 28 | Intermountain - Mona 345 kV | 1200 | 345 | ||
| Path 29 | Intermountain - Gonder 230 KV | 200241 | Not Defined | E to W | 230 |
| Path 30 | TOT 1A | 650 | Not Defined | E to W | 345 |
| Path 31 | TOT 2A | 690 | Not Defined | N to S | 345 |
| Path 32 | Pavant Intr-mtn - Gonder 230 KV | 500 | 235 | E to W | 230 |
| Path 33 | Bonanza West | 785 | Not Defined | E to W | 345 |
| Path 34 | TOT 2B see Paths 78 and 79 | 780 | 850 | N to S | |
| Path 35 | TOT 2C | 600 | 580 | NE to SW | 345 |
| Path 36 | TOT 3 | 1680 | Not Defined | N to S | 345 |
| Path 37 | See Path 85 | ||||
| Path 38 | TOT 4B | 880 | 230 | ||
| Path 39 | TOT 5 | 345 | |||
| Path 40 | TOT 7 | 890 | 230 | ||
| Path 41 | Sylmar to SCE | 1600 | 1600 | 230 | |
| Path 42 | IID - SCE | 750 | Not Defined | 230 | |
| Path 43 | North of San Onofre | ||||
| Path 44 | South of San Onofre | ||||
| Path 45 | SDG&E - CFE | 408 | 800 | S to N | |
| Path 46 | West of Colorado River (WOR) | 11200 | 11200 | Not Defined | 500 |
| Path 47 | Southern New Mexico (NM1) | 1048 | Not Defined | N to S | 345 |
| Path 48 | Northern New Mexico (NM2) | 2150 | 2150 | NW to SE | 345 |
| Path 49 | East of Colorado River (EOR) | 10100 | Not Defined | E to W | 500 |
| Path 50 | Cholla Pinnacle Peak | 1200 | Not Defined | NE to SW | 345 |
| Path 51 | Southern Navajo | 2800 | Not Defined | N to S | 500 |
| Path 52 | Silver Peak - Control 55 KV | 17 | 17 | 55 | |
| Path 54 | Coronado West | 1494 | 500 | ||
| Path 55 | Brownlee East | 1915 | 230 | ||
| Path 58 | Eldorado - Mead 230 kV | 1140 | 1140 | 230 | |
| Path 59 | WALC Blythe, SCE Blythe | 218 | Not Rated | 161 | |
| Path 60 | Inyo - Control 115 KV Tie | 56 | 56 | 115 | |
| Path 61 | Lugo - Victorville 500 KV Line | 2400 | 900 | N to S | 500 |
| Path 62 | Eldorado - McCullough 500 kV | 2598 | 2598 | 500 | |
| Path 64 | Marketplace - Adelanto line 500 kV | 500 | |||
| Path 65 | Pacific DC Intertie (PDCI) | 3220 | 3100 | N to S | 500 |
| Path 66 | California Oregon Intertie | 4800 | 3675 | N to S | 500 |
| Path 71 | South of Allston | 1170 | 500 | ||
| Path 73 | North of John Day | Not Defined | |||
| Path 75 | Hemingway - Summer Lake | 1500 | 400 | E to W | 500 |
| Path 76 | Alturas Project | 300 | 345 | ||
| Path 77 | Crystal - Allen | 300 | 500 | ||
| Path 78 | TOT 2B1 | 700 | 345 | ||
| Path 79 | TOT 2B2 | 265 | 300 | 230 | |
| Path 80 | Montana Southeast | 600 | 600 | 230 | |
| Path 81 | Centennial | 3790 | 500 | ||
| Path 82 | TOT B East | 2465 | Not Rated | 500 | |
| Path 83 | Montana/Alberta Tie Line | 300 | 230 | ||
| Path 84 | Harry Allen-Eldorado 500 kv | 1390 | 500 | ||
| Path 85 | Aeolus West | 1816 | 500 | ||
| Path 86 | West of John Day | 4760 | Not Rated | 500 | |
| Path 87 | West of McNary | 4925 | Not Rated | 500 | |
| Path 88 | West of Slatt | 4760 | Not Rated | 500 | |
| Path 89 | Southern Nevada Transmission Interface Plus | 6257 | 4681 | 500 | |