Assessment is based on results of IDNR ambient quarterly monitoring near Mapleton and an IDNR stream use assessment conducted downstream from Ida Grove in October 1995.
Basis for Assessment
Used assessment of support of aquatic life uses developed for the 1994 report (PS) along with results of DNR stream use assessment conducted downstream from Ida Grove in Oct 1995. Results of stream assessment supports the previous assessment as PS due to (1) extensive channelization and (2) excessive stream bank erosion in reaches not yet channelized. Assessment found very little for pool habitat even in the areas that remain meandered. Fish community at sampling site contains the expected species, but numbers of individuals per species, especially for larger fish, was relatively low.