Assessment Comments
Assessment is based on results of a fish kill investigation in April 2002.
Basis for Assessment
SUMMARY: The Class B(LR) aquatic life uses are assessed (monitored) as "partially supported" due to occurrence of a fish kill in April 2002. This kill was caused by a spill.
EXPLANATION: The fish kill occurred on April 29, 2002, and resulted from the discharge of 1,500 gallons of 10-34-0 starter fertilizer from a local dealer of agricultural chemicals. Approximately 6 miles of this stream was affected; approximately 5,800 fish were killed. According to IDNR's assessment methodology for Section 305(b) reporting, occurrence of a single pollution-caused fish kill within the most recent three-year period indicates ongoing impairment of the aquatic life uses. A fish kill also occurred on this stream in 1995; the kill was attributed to animal waste from a feedlot (see the assessment for the 1998 report for more information).
