1001 Saskatchewan
1002 Missouri Headwaters
1003 Missouri-Marias
100301 Upper Missouri
100302 Marias
1004 Missouri-Musselshell
100401 Fort Peck Lake
100402 Musselshell
1005 Milk
1006 Missouri-Poplar
1007 Upper Yellowstone
1008 Big Horn
1009 Powder-Tongue
100901 Tongue
100902 Powder
1010 Lower Yellowstone
1011 Missouri-Little Missouri
101101 Lake Sakakawea
101102 Little Missouri
1012 Cheyenne
101201 Cheyenne
101202 Belle Fourche
1013 Missouri-Oahe
101301 Lake Oahe
101302 Cannonball-Heart-Knife
101303 Grand-Moreau
1014 Missouri-White
101401 Fort Randall Reservoir
101402 White
1015 Niobrara
1016 James
1017 Missouri-Big Sioux
101701 Lewis and Clark Lake
101702 Big Sioux
1018 North Platte
1019 South Platte
1020 Platte
102001 Middle Platte
102002 Lower Platte
1021 Loup
1022 Elkhorn
1023 Missouri-Little Sioux
1024 Missouri-Nishnabotna
1025 Republican
1026 Smoky Hill
1027 Kansas
102701 Kansas
102702 Big Blue
1028 Chariton-Grand
102801 Grand
102802 Chariton
1029 Gasconade-Osage
102901 Osage
102902 Gasconade
1030 Lower Missouri
103001 Lower Missouri-Blackwater
103002 Lower Missouri
8 JUNE 1999, last updated on 9 AUG 2000
D.L. Gustafson
dlg@rapid.msu.montana.edu