text_combined: coi n derate day ahead market ran branch group coi ttc n direction changed 3675 mw 2450 mw 1700 2400 operating day 7 26 01 reason change northwest generation urgent pump repairs first applicable hour ahead market run values 1700 iso update changes line rating status sent market operations inquiries please call hour ahead desk system conditions described communication dynamic subject change iso attempted reflect current accurate information available preparing notice system conditions may change suddenly little notice