Assessment Comments
Assessment is based on results of an IDNR investigation of a fish kill in August 2000.
Basis for Assessment
SUMMARY: The general aquatic life uses remain assessed (monitored) as "partially supported" due to a fish kill in August 2000. This assessment is the same as that developed for the 2002 reporting cycle.
EXPLANATION: The general aquatic life uses are assessed (monitored) as "partially supported" due to occurrence of a fish kill. A fish kill occurred on this stream segment on August 19, 2000. The kill was caused by discharge of approximately 1000 gallons of water used at an ag-chemical dealer to off-gas a 10,500 gallon anydrous ammonia tank that was presumed empty. The water travelled down a drainage ditch and into the unnamed tributary to the Wapsipinicon River. No estimate of the number of fish killed was developed. The responsible party was identified and restitution was sought. According to DNR's assessment methodology for Section 305(b) reporting, occurrence of a single pollution-caused fish kill during the most recent three-year period (2000-02) indicates "partial support" of the aquatic life uses.
