Assessment Comments

Two stream use assessments in 1992.

Basis for Assessment

Used a review of the field sheets from the two October 1992 DNR stream use assessments in Polk and Dallas counties to continue to assess support of the Class B(LR) aquatic life use as FST due to (1) presence of relatively diverse fish communities at both assessment locations (species/ families:  18/4, 17/5) for streams in the Des Moines Lobe subecoregin (47b), (2) presence of a majority of the expected fish taxa (8 of 11 and 9 of 11) for streams in this subecoregion, and (3) indications on field sheets average to above average habitat quality (see above assessment developed for the 1994 305(b) report).   The primary impact to the physical characteristics of this stream is from old channelization and streambank erosion.   Presence of a buffer of mature trees has mitigated these impacts somewhat.