Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
37495
| NE | Cherry | Niobrara River below Cornell Dam | 1974 |
10150004
| Middle Niobrara | established |
37496
| NE | Dawes | Box Butte Reservoir and vicinity | 1974 |
10150002
| Niobrara Headwaters | established |
37493
| NE | Dawson | Platte River | 1974 |
10200101
| Middle Platte-Buffalo | established |
37491
| NE | Harlan | Harlan County Reservoir | 1974 |
10250009
| Harlan County Reservoir | established |
37492
| NE | Lincoln | Platte River | 1974 |
10200101
| Middle Platte-Buffalo | established |
37497
| NE | Sheridan | Walgren Lake, ca 6 mil se of Hay Springs, a disconnected sand hill lake | 1974 |
10150003
| Upper Niobrara | established |