8 10180001 North Platte Headwaters 8 10180002 Upper North Platte 8 10180010 Upper Laramie 8 10190001 South Platte Headwaters 8 10190002 Upper South Platte 8 10190003 Middle South Platte-Cherry Creek 8 10190004 Clear 8 10190005 St. Vrain 8 10190006 Big Thompson 8 10190007 Cache La Poudre 8 10190008 Lone Tree-Owl 8 10190009 Crow 8 10190010 Kiowa 8 10190011 Bijou 8 10190012 Middle South Platte-Sterling 8 10190013 Beaver 8 10190014 Pawnee 8 10190015 Upper Lodgepole 8 10190016 Lower Lodgepole 8 10190017 Sidney Draw 8 10190018 Lower South Platte 8 10250001 Arikaree 8 10250002 North Fork Republican 8 10250003 South Fork Republican 8 10250004 Upper Republican 8 10250005 Frenchman 8 10250006 Stinking Water 8 10250012 South Fork Beaver 8 10250013 Little Beaver 8 10260001 Smoky Hill Headwaters 8 10260002 North Fork Smoky Hill 8 10260004 Ladder 8 11020001 Arkansas Headwaters 8 11020002 Upper Arkansas 8 11020003 Fountain 8 11020004 Chico 8 11020005 Upper Arkansas-Lake Meredith 8 11020006 Huerfano 8 11020007 Apishapa 8 11020008 Horse 8 11020009 Upper Arkansas-John Martin Reservoir 8 11020010 Purgatoire 8 11020011 Big Sandy 8 11020012 Rush 8 11020013 Two Butte 8 11030001 Middle Arkansas-Lake Mckinney 8 11030002 Whitewoman 8 11040001 Cimarron Headwaters 8 11040002 Upper Cimarron 8 11040003 North Fork Cimarron 8 11040004 Sand Arroyo 8 11040005 Bear 8 11080001 Canadian Headwaters 8 13010001 Rio Grande Headwaters 8 13010002 Alamosa-Trinchera 8 13010003 San Luis 8 13010004 Saguache 8 13010005 Conejos 8 13020101 Upper Rio Grande 8 13020102 Rio Chama 8 14010001 Colorado Headwaters 8 14010002 Blue 8 14010003 Eagle 8 14010004 Roaring Fork 8 14010005 Colorado Headwaters-Plateau 8 14010006 Parachute-Roan 8 14020001 East-Taylor 8 14020002 Upper Gunnison 8 14020003 Tomichi 8 14020004 North Fork Gunnison 8 14020005 Lower Gunnison 8 14020006 Uncompahgre 8 14030001 Westwater Canyon 8 14030002 Upper Dolores 8 14030003 San Miguel 8 14030004 Lower Dolores 8 14030005 Upper Colorado-Kane Springs 8 14040106 Upper Green-Flaming Gorge Reservoir 8 14040109 Vermilion 8 14050001 Upper Yampa 8 14050002 Lower Yampa 8 14050003 Little Snake 8 14050005 Upper White 8 14050006 Piceance-Yellow 8 14050007 Lower White 8 14060001 Lower Green-Diamond 8 14080101 Upper San Juan 8 14080102 Piedra 8 14080104 Animas 8 14080105 Middle San Juan 8 14080107 Mancos 8 14080201 Lower San Juan-Four Corners 8 14080202 Mcelmo 8 14080203 Montezuma