{
 "aliases": [
  {
   "note": "Curated from BPA's OPI Paths page, ATCID and Transmission Plan; WECC path number where one applies",
   "relation": "exact",
   "review_state": "reviewed",
   "source_entity_id": "west-of-cascades-north",
   "source_ref": "bpa-paths"
  }
 ],
 "bbox": [
  -122.95291446416708,
  46.95739175829547,
  -118.999225241699,
  47.98714835002159
 ],
 "citation_path": "citations/path~bpa~west-of-cascades-north.html",
 "direction": "east to west positive",
 "facts": [
  {
   "basis": "BPA's published TTC series for the path (mode over the 30-day OPI window) or the WECC path rating where BPA publishes none; a directional operating limit, not a sum of line ratings",
   "coverage": null,
   "denominator": null,
   "evidence": "reported",
   "fact_id": "path:bpa:west-of-cascades-north#path_ttc_mw",
   "label": "Total transfer capability",
   "locator": "bpa_paths.csv; path_id=west-of-cascades-north; source=https://www.bpa.gov/-/media/Aep/transmission/atc-methodology/ATCID_V88_11FEB2026.pdf",
   "maturity": "final",
   "method": "curated",
   "metric": "path_ttc_mw",
   "missing_reason": null,
   "note": "BPA OPI TTC series 2026-08-18..09-17: E-W TTC mode/median 8,158 MW (range 6,904-8,392); WECC Path 4 other rating 10,700 MW E-W and W-E (not an accepted rating)",
   "period": {
    "as_of": "2026-09-18",
    "kind": "instant",
    "note": "Published limit on the review date; BPA's OPI TTC series varies by season and outage"
   },
   "precision": 0,
   "quality": "valid",
   "source_ref": "bpa-paths",
   "unit": "MW",
   "value": 8158.0
  }
 ],
 "geometry": {
  "from": "Chief Joseph / Schultz / Rocky Reach / Grand Coulee / Bettas Road",
  "mode": "lines",
  "note": "Drawn as the named BPA lines",
  "to": "Monroe / Raver / Echo Lake / Snohomish / Maple Valley / Olympia / Covington"
 },
 "id": "path:bpa:west-of-cascades-north",
 "kind": "flowgate",
 "kind_label": "Flowgate",
 "lines": [
  {
   "id": "line:bpa:CHJO-MONE-1",
   "name": "Chief Joseph-Monroe No 1",
   "type": "line",
   "voltage_class": "500",
   "voltage_kv": 500.0
  },
  {
   "id": "line:bpa:SHUL-ECOL-1",
   "name": "Schultz-Echo Lake No 1",
   "type": "line",
   "voltage_class": "500",
   "voltage_kv": 500.0
  },
  {
   "id": "line:bpa:SHUL-RAVE-1",
   "name": "Schultz-Raver No 1",
   "type": "line",
   "voltage_class": "500",
   "voltage_kv": 500.0
  },
  {
   "id": "line:bpa:SHUL-RAVE-3",
   "name": "Schultz-Raver No 3",
   "type": "line",
   "voltage_class": "500",
   "voltage_kv": 500.0
  },
  {
   "id": "line:bpa:SHUL-RAVE-4",
   "name": "Schultz-Raver No 4",
   "type": "line",
   "voltage_class": "500",
   "voltage_kv": 500.0
  },
  {
   "id": "line:bpa:CHJO-SNOH-3",
   "name": "Chief Joseph-Snohomish No 3",
   "type": "line",
   "voltage_class": "345",
   "voltage_kv": 345.0
  },
  {
   "id": "line:bpa:CHJO-SNOH-4",
   "name": "Chief Joseph-Snohomish No 4",
   "type": "line",
   "voltage_class": "345",
   "voltage_kv": 345.0
  },
  {
   "id": "line:bpa:RKYR-MPLV-1",
   "name": "Rocky Reach-Maple Valley No 1",
   "type": "line",
   "voltage_class": "345",
   "voltage_kv": 345.0
  },
  {
   "id": "line:bpa:OLYM-GCOU-1",
   "name": "Olympia-Grand Coulee No 1",
   "type": "line",
   "voltage_class": "230",
   "voltage_kv": 287.0
  },
  {
   "id": "line:bpa:COVI-BTRD-1",
   "name": "Covington-Bettas Road No 1",
   "type": "line",
   "voltage_class": "230",
   "voltage_kv": 230.0
  }
 ],
 "live": {
  "note": "BPA publishes this path in its OPI CSV (15-minute); not yet collected live",
  "series": null,
  "source": null
 },
 "name": "West of Cascades North",
 "note": "ATCID V88 name Cross Cascades North (OASIS C-CASC_N); partial: PSE Rocky Reach-Cascade 230 kV not in BPA line file; 2025 Transmission Plan 9.4 says the path only flows east to west; Olympia-Grand Coulee is 287 kV (WECC 2026 catalog prints 230 kV); PI 43515 A path is a metered cut plane; its TTC is a directional operating limit for the whole path, never a rating of any single line, and flow on it is not attributable to one line.",
 "release_id": "20260929T050546Z-51ae0f7d3c78",
 "schema_version": "1.41.0",
 "source": {
  "publisher": "BPA Transmission Services",
  "reviewed_on": "2026-09-18",
  "reviewer": "claude-1d5",
  "url": "https://www.bpa.gov/-/media/Aep/transmission/atc-methodology/ATCID_V88_11FEB2026.pdf"
 },
 "source_name": null,
 "sources": [
  "bpa-lines",
  "bpa-paths"
 ],
 "type": "path",
 "updated_reason": null,
 "wecc_path": "Path 4"
}