Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
36821
| MT | | lower Musselshell drainage | 1990 |
10040205
| Lower Musselshell | established |
36822
| MT | | middle Musselshell drainage | 1990 |
10040202
| Middle Musselshell | established |
36756
| MT | | Musselshell (HUC6) non-specific | 1990 |
10040200
| Musselshell | established |
290429
| MT | Garfield | Musselshell River(River Miles: 5.6 to 13)[Calculated using NHD+ v2.0 GIS dataset] | 2011 |
10040205
| Lower Musselshell | established |
290430
| MT | Garfield | Musselshell River(River Miles: 7.4 to 7.5)[Calculated using NHD+ v2.0 GIS dataset] | 2005 |
10040205
| Lower Musselshell | established |
290431
| MT | Garfield | Musselshell River(River Miles: 7.9 to 8)[Calculated using NHD+ v2.0 GIS dataset] | 2003 |
10040205
| Lower Musselshell | established |
290432
| MT | Petroleum | Musselshell River(River Miles: 77.2 to 77.3)[Calculated using NHD+ v2.0 GIS dataset] | 2010 |
10040205
| Lower Musselshell | established |
290433
| MT | Petroleum | Musselshell River(River Miles: 81 to 81.1)[Calculated using NHD+ v2.0 GIS dataset] | 2010 |
10040205
| Lower Musselshell | established |
36823
| MT | Petroleum | Petrolia Lake (?), lower Flatwillow Creek | 1990 |
10040203
| Flatwillow | established |
289776
| MT | Petroleum | Petrolia Reservoir | 1985 |
10040203
| Flatwillow | established |
289775
| MT | Petroleum | Petrolia Reservoir | 1991 |
10040203
| Flatwillow | established |
289774
| MT | Petroleum | Petrolia Reservoir | 1995 |
10040203
| Flatwillow | established |
289770
| MT | Petroleum | Petrolia Reservoir | 1997 |
10040203
| Flatwillow | established |
289773
| MT | Petroleum | Petrolia Reservoir | 2000 |
10040203
| Flatwillow | established |
289769
| MT | Petroleum | Petrolia Reservoir | 2002 |
10040203
| Flatwillow | established |
289772
| MT | Petroleum | Petrolia Reservoir | 2005 |
10040203
| Flatwillow | established |
289771
| MT | Petroleum | Petrolia Reservoir | 2010 |
10040203
| Flatwillow | established |
289768
| MT | Petroleum | Petrolia Reservoir | 2011 |
10040203
| Flatwillow | established |
289571
| MT | Wheatland | Deadmans Basin Reservoir | 2005 |
10040201
| Upper Musselshell | established |
289572
| MT | Wheatland | Deadmans Basin Reservoir | 2005 |
10040201
| Upper Musselshell | established |