Assessment Comments

Assessment is based on (1) results of DNR monthly monitoring SE of Norwalk.

Basis for Assessment

Used results of DNR monthly monitoring station  SE of Norwalk to assess support of the Class B(LR) aquatic life  uses as FST due to lack of violations of WQ criteria for toxic  and conventional pollutants in the 24 samples collected during  the Oct 95-Sept 97 period.    A review of the field sheet from the September  1990 DNR stream use assessment shows that a slight majority  of the expected fish taxa (5 of 8) for streams in the  Mississippi River portion of the Southern Iowa Rolling Loess  Prairies subecoregion (47f) were present as was the expected  game fish species (channel catfish).   The data upon which this  assessment is based are more than 5 years old.   Additional  monitoring is needed to update this assessment and to determine  the status of the aquatic communities and habitats.