Sny Magill Creek IA 01-YEL-430

Assessment Comments

Assessment is based on (1) results of at Sny Magill project sites monitored for water quality, fish, macroinverts, and habitat at varying frequencies and (2) a 2002 DNR summary of trout reproduction.

Basis for Assessment

SUMMARY:  The Class B(CW) coldwater aquatic life uses are assessed as "fully supported."  Fish consumption uses remain "not assessed."  EXPLANATION:  Based on the assessment developed for the 2000 report, and based on an updated summary of trout reproduction in Iowa streams prepared by the DNR Fisheries Bureau in April 2002, the Class B(CW) uses were upgraded from "fully supported / threatened" to "fully supported."  According to this summary, this reach of Sny Magill Creek is in the category of Iowa trout streams that have fairly consistent natural reproduction and are capable of maintaining a viable population for the target trout species without any stocking.   This assessment is supported by results of chemical water quality monitoring conducted from 1996 through 1999 (see assessment for the 2000 report).   Fish consumption uses remain "not assessed" due to lack of fish tissue monitoring in this stream reach.