Assessment Comments
Assessment is based on results of IDNR/UHL biological (biocriteria) monitoring in 1997: (Fish IBI= 39(fair), BM-IBI= 70(good)).
Basis for Assessment
[Note: For the 2002 report, the previous waterbody segment for the Maple River (IA 06-LSR-0070-0), which extended 45 miles from its mouth confluence with the Odebolt Creek at Ida Grove (Ida Co.), was split into two subsegments: (1) mouth (Monona Co.) to confluence with an unnamed tributary 1 mile east of Danbury in Woodbury Co. (IA 06-LSR-0070-1) and (2) unnamed tributary near Danbury to confluence with Odebolt Creek at Ida Grove (Ida Co.) (IA 06-LSR-0070-2 - this one). See previous Section 305(b) assessments for subsegment IA 06-LSR-0070_1 for assessments for the original 45-mile river reach.]
SUMMARY: The Class B(WW) aquatic life uses are assessed (monitored) as "fully supported / threatened" (minor impacts) based on results of IDNR/UHL biological (biocriteria) sampling in 1997. Fish consumption uses remain "not assessed" due to the lack of fish contaminant monitoring in this stream segment. This is the same assessment as that developed for the 2002 reporting cycle.
EXPLANATION: This assessment remains based on results from the August 1997 DNR/UHL biocriteria sampling near Ida Grove. Based on a comparison to results of ecoregion reference site sampling, the fish community was rated "fair" (Fish IBI=39), and the benthic macroinvertebrate community was rated "good" (BM IBI=70). These results suggest that the aquatic life uses are "fully supported / threatened." See the assessment developed for the 2000 reporting cyle for more information.
Fish consumption uses remain "not assessed" due to the lack of fish contaminant monitoring in this river segment.
