Indian Creek IA 02-CED-504

Assessment Comments

Assessment is based on occurrence of fish kill in August 1998.

Basis for Assessment

SUMMARY:  The Class B(LR) aquatic life uses were assessed as "partially supported."  EXPLANATION:  The assessment of the Class B(LR) aquatic life uses developed for the 1998 report ("fully supported / threatened") was based on results of a fish survey conducted by the DNR Fisheries Bureau in July 1996.   A fish kill, however, occurred in Indian Creek at Marion on August 25, 1998.   This kill occurred following the injection of approximately 90 gallons of termaticide at a residence.   Approximately 2.25 miles of stream were affected; an estimated 43,300 fish were killed (a fish kill on Indian Creek at Cedar Rapids also occurred on May 24, 1994; no cause or source of the kill was identified).   According to DNR's assessment methodology for Section 305(b) reporting, occurrence of a single pollution-caused fish kill within the most recent three-year period (1997-1999) indicates that the aquatic life uses of a waterbody are only "partially supported."  Thus, the assessment of support of the Class B(LR) aquatic life uses of this stream was changed from "fully supported / threatened" to "partially supported."