Beaver Creek IA 04-UDM-1292
mouth (S32 T91N R28W Humboldt Co.) to confluence with unnamed tributary in S28 T91N R28W Humboldt Co.
The Class BWW2 use was assessed as "WINOFI" based on historical biological sampling data and habitat assessment. All other designated uses were "not assessed."
Presumptive Class A1 - No Data Class BWW2 - Biological Sampling: The Class BWW2 aquatic life use was assessed (evaluated) as "WINOFI" due to (1) very low fish community diversity (4 species from 2 families) for streams in the Des Moines Lobe sub-ecoregion (47b) and (2) presence of very few of the expected fish taxa (2 of 11) for streams in the 47b sub-ecoregion. Although results of fish sampling were negatively influenced by the difficulty of seining in several rocky and snag-filled pools, the results suggest a potential water quality problem, especially considering the relatively high quality aquatic habitats present at the assessment site. Follow-up monitoring is still needed in this stream reach to determine the status of aquatic communities and habitats and to determine the degree to which the aquatic life use may be impaired. Although the sampling of the fish community was negatively affected by large rocks and other debris in the stream, the low diversity suggests that follow-up monitoring should be conducted to better determine the status of the aquatic communities and habitats and to determine whether the aquatic life use is impaired. The field sheet did not indicate any significant impacts to the physical characteristics of this stream. Follow-up monitoring is still needed in this stream reach to determine the status of aquatic communities and habitats and to determine the degree to which the aquatic life use may be impaired.