Badger Creek Lake IA 04-LDM-1100

Assessment Comments

Assessment is based on results of (1) surveys by IDNR Fisheries Bureau, (2) ISU report on lake phytoplankton communities, and (3) results of U.S. EPA/IDNR fish tissue monitoring in 1999.

Basis for Assessment

SUMMARY:  Continue to use the assessment of support of the Class B(LW) aquatic life uses developed for the 1998 report ("partially supported"); support of Class A (primary contact uses) remains "not assessed" (lake not used for swimming); fish consumption uses are assessed as fully supported (=FS) based on results of fish tissue monitoring in 1999.   EXPLANATION:  A fish kill occurred during the biennial period on September 8, 1998; this kill was attributed natural conditions (summerkill); approximately 1,000 fish were killed.   (A similar kill occurred on May 27, 1990, when an estimated 30,000 fish were killed).   This lake is scheduled to be sampled as part of the ISU/DNR lake water quality monitoring project.   Results of EPA/DNR fish tissue monitoring (RAFT) in 1999 showed very low levels of very few contaminants in the composite samples of fillets from channel catfish and black crappie.   The previous assessment of the Class B(LW) aquatic life uses ("partially supported") was reviewed and approved by the DNR Fisheries Bureau in 2000.