Assessment Comments

Assessment is based on results of IDNR ambient monthly monitoring SW of Waterloo and DNR Biocriteria sampling.

Basis for Assessment

Continue to use the assessment of support of the Class A primary contact recreation uses developed for the 1996 report (=PS).   This assessment, however, was based on monitoring conducted during the October 1993 to September 1995 period; additional monitoring is needed to verify that the high levels of fecal coliform bacteria continue to occur.  Used results of DNR biocriteria sampling in July 1996 to assess support of the Class B(WW) aquatic life uses as FST due to (1) presence of a relatively diverse fish community (20 species from 5 families), (2) presence of most (9 of 11) of the expected fish taxa for streams in the Iowan surface subecoregion (the taxa missing are small stream species not expected in the mid-sized and larger streams such as this reach of Black Hawk Creek), and (3) presence of game fish species (channel catfish; also 1 smallmouth bass).