text_combined: coi rating change heo 6 09 08 30 01 day ahead market ran coi branch group ttc north south south north direction changed 4300 mw 4030 mw 3675 mw 2450 mw heo 9 hel 8 operating day 08 30 01 reason change late notification bpa 500 kv line work first applicable hour ahead market run values heo 9 iso update changes line rating status sent market operations inquiries please call hour ahead desk day ahead market ran pdci branch group ttc north south south north direction changed 2875 mw 2525 mw 2084 mw 1904 mw heo 9 hel 8 operating day 08 30 01 reason change late notification bpa 500 kv line work first applicable hour ahead market run values heo 9 iso update changes line rating status sent market operations inquiries please call hour ahead desk