| 2025-03-05 | Missouri tributary |
| 2024-08-15 | Major tributary of the Missouri |
| 2024-05-19 | South ___, river through Denver |
| 2020-11-14 | Tributary of the Missouri |
| 2019-04-28 | Tributary of the Missouri |
| 2017-08-17 | River paralleled by I-80 through a long stretch of the Plains |
| 2014-12-16 | Missouri feeder |
| 2014-10-26 | Missouri tributary |
| 2014-01-16 | River to the Missouri |
| 2011-08-31 | Nebraska river |
| 2011-01-22 | Gothenburg's river |
| 2009-05-16 | River facetiously described as "a mile wide at the mouth, but only six inches deep" |
| 2006-07-01 | Kearney's river |
| 2006-01-22 | Missouri feeder |
| 2005-11-08 | Nebraska river |
| 2005-10-21 | Divider of Nebraska |
| 2005-05-07 | River followed by the Oregon Trail |
| 2003-01-29 | Nebraska river |
| 2002-08-08 | River across Nebraska |
| 2002-01-25 | Missouri feeder |
| 2001-11-24 | River where the Oto once settled |
| 1999-08-31 | Nebraska river |
| 1999-07-06 | Missouri River tributary |
| 1998-04-10 | County in Missouri or Nebraska |
| 1998-01-10 | Oregon Trail river |