| ID | Basin Name | Value |
| 1 | Marias Above Tiber Reservoir | -2.6 |
| 1 | Marias Above Tiber Reservoir | -2.6 |
| 2 | Tobacco | -3.1 |
| 2 | Tobacco | -3.1 |
| 3 | Kootenai to Libby Dam | -3.6 |
| 3 | Kootenai to Libby Dam | -3.6 |
| 4 | Kootenai River below Libby Dam | -1.8 |
| 4 | Kootenai River below Libby Dam | -1.8 |
| 5 | Fisher River | -2.9 |
| 5 | Fisher River | -2.9 |
| 6 | Yaak River | -3.3 |
| 6 | Yaak River | -3.3 |
| 7 | North FK. Flathead River | -3.5 |
| 7 | North FK. Flathead River | -3.5 |
| 8 | Middle FK. Flathead River | -3.6 |
| 8 | Middle FK. Flathead River | -3.6 |
| 9 | South FK. Flathead River | -1.7 |
| 9 | South FK. Flathead River | -1.7 |
| 10 | Flathead at Columbia Falls | -2.8 |
| 10 | Flathead at Columbia Falls | -2.8 |
| 11 | Stillwater/Whitefish Rivers | -2.8 |
| 11 | Stillwater/Whitefish Rivers | -2.8 |
| 12 | Swan River | -4 |
| 12 | Swan River | -4 |
| 13 | Flathead River at Polson | -2.3 |
| 13 | Flathead River at Polson | -2.3 |
| 14 | Mission Valley | -3.2 |
| 14 | Mission Valley | -3.2 |
| 15 | Little Bitterroot River | -3.9 |
| 15 | Little Bitterroot River | -3.9 |
| 16 | Clark above Missoula | -3.3 |
| 16 | Clark above Missoula | -3.3 |
| 17 | Blackfoot River | -2.6 |
| 17 | Blackfoot River | -2.6 |
| 18 | Clark Fork above Missoula | -9.9 |
| 18 | Clark Fork above Missoula | -9.9 |
| 19 | Bitterroot River | -2.5 |
| 19 | Bitterroot River | -2.5 |
| 20 | Clark Fork River below Bitterroot River | -2.9 |
| 20 | Clark Fork River below Bitterroot River | -2.9 |
| 21 | Clark Fork River below Flathead River | -2.5 |
| 21 | Clark Fork River below Flathead River | -2.5 |
| 22 | Beaverhead River | -4 |
| 22 | Beaverhead River | -4 |
| 23 | Ruby River | -4 |
| 23 | Ruby River | -4 |
| 24 | Big Hole River | -4 |
| 24 | Big Hole River | -4 |
| 25 | Boulder River (Jefferson) | -3.1 |
| 25 | Boulder River (Jefferson) | -3.1 |
| 26 | Jefferson River | -4 |
| 26 | Jefferson River | -4 |
| 27 | Madison River | -2.9 |
| 27 | Madison River | -2.9 |
| 28 | Gallatin River | -3.7 |
| 28 | Gallatin River | -3.7 |
| 29 | Missouri River above Canyon Ferry | -4 |
| 29 | Missouri River above Canyon Ferry | -4 |
| 30 | Missouri River below Canyon Ferry | -4 |
| 30 | Missouri River below Canyon Ferry | -4 |
| 31 | Smith River | -2.3 |
| 31 | Smith River | -2.3 |
| 32 | Sun River | -2.5 |
| 32 | Sun River | -2.5 |
| 33 | Teton River | -2.6 |
| 33 | Teton River | -2.6 |
| 34 | Birch/Dupuyer | -2.6 |
| 34 | Birch/Dupuyer | -2.6 |
| 35 | Marias Below Tiber Reservoir | -2.4 |
| 35 | Marias Below Tiber Reservoir | -2.4 |
| 36 | Musselshell River | -3.8 |
| 36 | Musselshell River | -3.8 |
| 37 | Missouri River above Fort Peck | -3.5 |
| 37 | Missouri River above Fort Peck | -3.5 |
| 38 | Missouri River below Fort Peck | -4 |
| 38 | Missouri River below Fort Peck | -4 |
| 39 | Milk River | -3.1 |
| 39 | Milk River | -3.1 |
| 40 | Dearborn | -3.5 |
| 40 | Dearborn | -3.5 |
| 41 | Yellowstone River above Livingston | -3.1 |
| 41 | Yellowstone River above Livingston | -3.1 |
| 42 | Shields River | -3.5 |
| 42 | Shields River | -3.5 |
| 43 | Boulder River (Yellowstone) | -4 |
| 43 | Boulder River (Yellowstone) | -4 |
| 44 | Stillwater River | -3.5 |
| 44 | Stillwater River | -3.5 |
| 45 | Rock/Red Lodge Creeks | -4 |
| 45 | Rock/Red Lodge Creeks | -4 |
| 46 | Clarks Fork River | -3.3 |
| 46 | Clarks Fork River | -3.3 |
| 47 | Yellowstone River above Bighorn River | -3.3 |
| 47 | Yellowstone River above Bighorn River | -3.3 |
| 48 | Bighorn River below Bighorn Lake | -4 |
| 48 | Bighorn River below Bighorn Lake | -4 |
| 49 | Little Bighorn River | -3.7 |
| 49 | Little Bighorn River | -3.7 |
| 50 | Yellowstone River below Bighorn River | -3.6 |
| 50 | Yellowstone River below Bighorn River | -3.6 |
| 51 | Tongue River | -3.7 |
| 51 | Tongue River | -3.7 |
| 52 | Powder River | -4 |
| 52 | Powder River | -4 |