31 10120106 Angostura Reservoir
31 10120108 Hat
31 10140201 Upper White
31 10140203 Little White
31 10150001 Ponca
31 10150002 Niobrara Headwaters
31 10150003 Upper Niobrara
31 10150004 Middle Niobrara
31 10150005 Snake
31 10150006 Keya Paha
31 10150007 Lower Niobrara
31 10170101 Lewis and Clark Lake
31 10180009 Middle North Platte-Scotts Bluff
31 10180012 Horse
31 10180013 Pumpkin
31 10180014 Lower North Platte
31 10190012 Middle South Platte-Sterling
31 10190015 Upper Lodgepole
31 10190016 Lower Lodgepole
31 10190017 Sidney Draw
31 10190018 Lower South Platte
31 10200101 Middle Platte-Buffalo
31 10200102 Wood
31 10200103 Middle Platte-Prairie
31 10200201 Lower Platte-Shell
31 10200202 Lower Platte
31 10200203 Salt
31 10210001 Upper Middle Loup
31 10210002 Dismal
31 10210003 Lower Middle Loup
31 10210004 South Loup
31 10210005 Mud
31 10210006 Upper North Loup
31 10210007 Lower North Loup
31 10210008 Calamus
31 10210009 Loup
31 10210010 Cedar
31 10220001 Upper Elkhorn
31 10220002 North Fork Elkhorn
31 10220003 Lower Elkhorn
31 10220004 Logan
31 10230001 Blackbird-Soldier
31 10230006 Big Papillion-Mosquito
31 10240001 Keg-Weeping Water
31 10240005 Tarkio-Wolf
31 10240006 Little Nemaha
31 10240007 South Fork Big Nemaha
31 10240008 Big Nemaha
31 10250001 Arikaree
31 10250002 North Fork Republican
31 10250003 South Fork Republican
31 10250004 Upper Republican
31 10250005 Frenchman
31 10250006 Stinking Water
31 10250007 Red Willow
31 10250008 Medicine
31 10250009 Harlan County Reservoir
31 10250011 Lower Sappa
31 10250014 Beaver
31 10250015 Prairie Dog
31 10250016 Middle Republican
31 10270201 Upper Big Blue
31 10270202 Middle Big Blue
31 10270203 West Fork Big Blue
31 10270204 Turkey
31 10270205 Lower Big Blue
31 10270206 Upper Little Blue
31 10270207 Lower Little Blue