Clear Lake Marsh IA 02-WIN-838

Assessment Comments

Assessment based on information from the IDNR Wildlife Bureau.

Basis for Assessment

SUMMARY:  The Class B(LW) aquatic life uses remain assessed (evaluated) as "not supported" based on information from the IDNR Wildlife Bureau.   Fish consumption uses remain "not assessed."  

EXPLANATION:  The Class B(LW) aquatic life uses remain assessed (evaluated) as "not supported" based on information from the Iowa DNR Wildife Bureau.   As stated in the assessment developed for the 1998 reporting cycle, the IDNR Wildlife biologist indicated that the flow diversion structure is not functioning properly and poor hydrological characteristics are contributing to poor wetland quality.   The assessment category for this wetland of "evaluated" indicates that the assessment is based entirely on "best professional judgement."  In terms of Section 305(b) reporting, "monitored assessments" are based primarily on recent, site-specific ambient monitoring data and thus have relatively high confidence.   IDNR considers waterbodies identified as "impaired" based on "monitored assessments" as candidates for the state's Section 303(d) list.   "Evaluated assessments" are those based on data older than five years or other than site-specific ambient monitoring data (e.g., questionnaire surveys of fish and game biologists [=best professional judgement]) and thus have relatively lower confidence.   IDNR does not consider waterbodies identified as "impaired" based on "evaluated assessments" as candidates for the state's Section 303(d) list.  

Fish consumption uses remain "not assessed."  In general, Iowa wetlands are not managed for recreational fisheries; thus, fish contaminant monitoring is not typically conducted at these waterbodies.