Flood Creek IA 02-SHL-788

Assessment Comments

Assessment is based on results of (1) USGS/NAWQA water quality monitoring near Powersville and DNR stream use assessment in 1992.

Basis for Assessment

Continue to use the assessment of support of the Class B(WW) aquatic life uses developed for the 1996 report (=FST).   In addition, used results of fish tissue monitoring conducted for the USGS National Water Quality Assessment (NAWQA) program in the eastern Iowa river basins study area to assess support of the fish consumption uses as FS.   The whole fish composite sample of white sucker was analyzed for several organochlorine compounds, including chlordane, dieldrin, DDT, and PCBs.   Levels of these contaminants were all below the respective FDA action levels, thus suggesting full suppport of fish consumption uses.   For more information, see USGS Fact Sheet FS-027-97 (March 1997).  A review of the field sheet from the June 1992 DNR stream use assessment in Floyd County shows that only three cyprinid species representing 3 of the 11 expected fish taxa for the Iowan surface subecoregion were captured from the assessment site on Flood Creek.   Notes on the field sheet indicate that rocks and snags prevented effective seining.   Additional monitoring is needed with electrofishing equipment to better define the status of the aquatic communities of this stream.  The field sheet does not indicate any significant threats to the physcial characteristics of this stream at the site assessed.