Lake Hendricks IA 01-WPS-356

Assessment Comments

Assessment is based on surveys by DNR Fisheries and results of fish tissue (RAFT) monitoring in 1994.

Basis for Assessment

SUMMARY:  The Class A (primary contact recreation) uses were considered "not assessed."  The Class B(LW) aquatic life uses were assessed as "partially supported."  Fish consumption uses were assessed as fully supported.   EXPLANATION:  The Class A uses were considered "not assessed" due to a lack of information on levels of indicator bacteria for this lake.   The assessment of support for the Class B(LW) uses was changed from "fully supported / threatened" to "partially supported" based on the recommendation of the DNR Fisheries Bureau.   Monitoring of winter levels of dissolved oxygen suggests that a water quality problem exists despite winter aeration.   The primary impacts appear to be excessive growth of aquatic plants (macrophytes) and organic enrichment; siltation is not believed to be a problem.   Fish consumption uses remained assessed as "fully supported" based on results of EPA/DNR fish tissue (RAFT) monitoring in 1994 (see assessment for the 1998 report above).   This lake is scheduled to be sampled as part of the ISU/DNR lake water quality monitoring project.