30 10010001 Belly
30 10010002 St. Mary
30 10020001 Red Rock
30 10020002 Beaverhead
30 10020003 Ruby
30 10020004 Big Hole
30 10020005 Jefferson
30 10020006 Boulder
30 10020007 Madison
30 10020008 Gallatin
30 10030101 Upper Missouri
30 10030102 Upper Missouri-Dearborn
30 10030103 Smith
30 10030104 Sun
30 10030105 Belt
30 10030201 Two Medicine
30 10030202 Cut Bank
30 10030203 Marias
30 10030204 Willow
30 10030205 Teton
30 10040101 Bullwhacker-Dog
30 10040102 Arrow
30 10040103 Judith
30 10040104 Fort Peck Reservoir
30 10040105 Big Dry
30 10040106 Little Dry
30 10040201 Upper Musselshell
30 10040202 Middle Musselshell
30 10040203 Flatwillow
30 10040204 Box Elder
30 10040205 Lower Musselshell
30 10050001 Milk Headwaters
30 10050002 Upper Milk
30 10050003 Wild Horse Lake
30 10050004 Middle Milk
30 10050005 Big Sandy
30 10050006 Sage
30 10050007 Lodge
30 10050008 Battle
30 10050009 Peoples
30 10050010 Cottonwood
30 10050011 Whitewater
30 10050012 Lower Milk
30 10050013 Frenchman
30 10050014 Beaver
30 10050015 Rock
30 10050016 Porcupine
30 10060001 Prarie Elk-Wolf
30 10060002 Redwater
30 10060003 Poplar
30 10060004 West Fork Poplar
30 10060005 Charlie-Little Muddy
30 10060006 Big Muddy
30 10060007 Brush Lake Closed Basin
30 10070001 Yellowstone Headwaters
30 10070002 Upper Yellowstone
30 10070003 Shields
30 10070004 Upper Yellowstone-Lake Basin
30 10070005 Stillwater
30 10070006 Clarks Fork Yellowstone
30 10070007 Upper Yellowstone-Pompeys Pillar
30 10070008 Pryor
30 10080010 Big Horn Lake
30 10080014 Shoshone
30 10080015 Lower Bighorn
30 10080016 Little Bighorn
30 10090101 Upper Tongue
30 10090102 Lower Tongue
30 10090207 Middle Powder
30 10090208 Little Powder
30 10090209 Lower Powder
30 10090210 Mizpah
30 10100001 Lower Yellowstone-Sunday
30 10100002 Big Porcupine
30 10100003 Rosebud
30 10100004 Lower Yellowstone
30 10100005 O'Fallon
30 10110201 Upper Little Missouri
30 10110202 Boxelder
30 10110203 Middle Little Missouri
30 10110204 Beaver
30 10120202 Lower Belle Fourche
30 17010101 Upper Kootenai
30 17010102 Fisher
30 17010103 Yaak
30 17010104 Lower Kootenai
30 17010105 Moyie
30 17010201 Upper Clark Fork
30 17010202 Flint-Rock
30 17010203 Blackfoot
30 17010204 Middle Clark Fork
30 17010205 Bitterroot
30 17010206 North Fork Flathead
30 17010207 Middle Fork Flathead
30 17010208 Flathead Lake
30 17010209 South Fork Flathead
30 17010210 Stillwater
30 17010211 Swan
30 17010212 Lower Flathead
30 17010213 Lower Clark Fork