| Order | Streams (number) | Streams Unaltered | Original Miles | Miles Unchannelized (% of orig.) | Miles Altered (% of orig.) | Current Miles | Miles Channelized (% of current) |
|---|---|---|---|---|---|---|---|
| 6 | 21 | 0 | 226 | 50 (22) | 176 (78) | 138 | 88 (64) |
| 5 | 5 | 0 | 284 | 81 (28) | 203 (72) | 191 | 110 (58) |
| 4 | 23 | 2 | 351 | 188 (54) | 163 (46) | 283 | 95 (34) |
| 4,5,6 | 30 | 2 | 861 | 319 (38) | 542 (62) | 612 | 293 (48) |
1 - The Nodaway River splits into three branches in its' upper reaches, the West Nodaway River, Middle Nodaway River, and East Nodaway River. The West Nodaway is a sixth order river and the East Nodaway a fifth order river where they join and form the Nodaway River. The West Nodaway and Nodaway River mileages are combined for this table.
