Assessment Comments
Assessment remains based on results of fish / benthic macroinvertebrate monitoring conducted by UHL in 1998 and 1999.
Basis for Assessment
SUMMARY: The Class B(LR) aquatic life uses are assessed (evaluated) as "fully supported" based on results of biological monitoring conducted by UHL in 1997 and 1998. Fish consumption uses remain "not assessed." Due only to a change in IDNR's assessment/listing methodology, assessment of the the Class B(LR) aquatic life uses of this segment is changed from "fully supporting / threatened" (minor impacts) to "fully supporting". Other than this change in methodology, this assessment is the same as that developed for the previous (2004) assessment/listing cycle.
EXPLANATION: The aquatic life uses are assessed (evaluated) as "fully supported" based on results of the biological monitoring conducted on this stream segment from 1997 and 1998 (see assessment for the 2000 report). Because these data are now considered too old (greater than five years) to accurately characterize current water quality conditions, the assessment category is considered “evaluated” (indicating an assessment with relatively lower confidence) as opposed to "monitored" (indicating an assessment with relatively higher confidence). At the recommendation of U.S. EPA Region 7, IDNR's 2006 assessment/listing methodology was changed to eliminate use of the "fully supported/threatened" (not impaired) category. Thus, previous assessments identified as "fully supported/threatened" (minor impacts) were changed to "fully supported" for the 2006 assessment/listing cycle. This change does not alter the 2004 assessment: this waterbody remains in IR Category 1.
