Assessment Comments
Assessment is based on results of an October 1995 DNR stream use assessment.
Basis for Assessment
SUMMARY: The Class B(LR) aquatic life uses remain assessed as "fully supported / threatened." EXPLANATION: The assessment of support of the Class B(LR) uses remains based on the biological and habitat information from the October 1995 DNR stream use assessment conducted at Reiff County Park (Sac County) (see assessment for the 1998 report above). A review of the field sheets from the October 1995 DNR stream use assessment shows (1) presence of a relatively diverse fish community for streams in the Des Moines Lobe (47b) subecoregion (16 species from 7 families) and (2) presence of a majority of the expected fish taxa (7 of 11) for streams in this subecoregion. According to DNR's assessment methodology for Section 305(b) reporting, these results suggest that the Class B(LR) aquatic life use are "fully supported / threatened." (Note: The upper reaches of the Boyer River lie in the "fuzzy boundary" region between the Northwest Iowa Loess Prairies (47a) and the Des Moines Lobe (47b) subecoregions. The fish community of the upper Boyer shows affinities to those of both subecoregions, and Section 305(b) scoring for the October 1995 assessment for either subecoregion does not affect the assessment result of "fully supported / threatened" for this stream reach.)
