Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
1401057
| IA | Johnson | Iowa River near Iowa City/Coralville below Coralville Reservoir | 2011 |
07080209
| Lower Iowa | established |
1634456
| IA | Johnson | Iowa River, University of Iowa Hancher footbridge | 2017 |
07080209
| Lower Iowa | established |
1634361
| IA | Johnson | Iowa River, University of Iowa Power Plant, Iowa City | 2015 |
07080209
| Lower Iowa | established |
51069
| IA | Linn | Cedar River, vicinity of Lewis Access, 4 mi upstream from Duane Arnold Energy Center power plant | 1979 |
07080205
| Middle Cedar | established |
1401060
| IA | Linn | Pleasant Creek Lake near Palo | 2016 |
07080205
| Middle Cedar | established |
1634506
| IA | Linn | Pleasant Creek Lake, 3.5 mi N Palo | 2018 |
07080205
| Middle Cedar | established |