Silver Creek IA 05-NSH-1454
from Middle Silver Cr. (S31 T74N R41W Pottawattamie Co.) to confluence with Little Silver Cr. in S34 T78N R40W Shelby Co.
Assessment Comments
Stream use assessment in 1992.
Basis for Assessment
Upgraded assessment of support of the Class B(LR) aquatic life uses from PS to FST due to (1) results of biological assessments in 1984 (rotenone survey by Paragamian (1986)) and 1992 (DNR stream use assessment) that suggest that Silver Creek supports a fish community typical of Class B(LR) streams in this region. Although the 1992 DNR stream use assessment produced only about half the expected species/genera (as compared to Paragamians roteneone sample which produced nearly all the expected species/genera), difficulty seining due to debris in the stream was noted. More thorough sampling would likely produce additional fish species. Additional monitoring is needed to update the assessment and to determine the status of the aquatic communities and habitats.
Assessment Key Dates
Methods
| 330 | Fish surveys |
| 375 | Visual observation-- may not quantify some parameters-- single season-- by prof. |
| 150 | Monitoring data more than 5 years old |
Monitoring Levels
| Biological | 3 |
| Habitat | 3 |
| Physical Chemistry | 0 |
| Toxic | 0 |
| Pathogen Indicators | 0 |
| Other Health Indicators | 0 |
| Other Aquatic Life Indicators | 0 |
| # of Bio Sites | 0 |
| BioIntegrity | N/A |