Missouri River IA 06-WEM-1720

Assessment Comments

Assessment remains based on information from Nebraska fisheries biologists on habitat conditions in the Missouri River.

Basis for Assessment

SUMMARY:  The Class A1 (primary contact recreation) remain “not assessed” (IR 3a) due to the lack of information upon which to base an assessment.   The Class B(WW1) aquatic life uses remain assessed (evaluated) as "partially supported" (IR 4c) based on information from local fisheries biologists on impacts related to flow modification and habitat alterations in this segment of the Missouri River.   The human health/fish consumption uses remain “not assessed” (IR 3a) due to the lack of fish contaminant monitoring in this river segment.   The source of information for this assessment remains information from Nebraska fisheries biologists on habitat conditions in the Missouri River.  

EXPLANATION:  The Class A1 (primary contact recreation) uses remain “not assessed” due to the lack of information upon which to base an assessment.  

The Class B(WW1) uses remain assessed (evaluated) as "partially supported" (IR Category 4c, non-pollutant stressor) based on the assessment developed for previous assessment/listing cycles (i.e., habitat alterations and flow modifications that resulted from development of the river for navigation uses in the mid-Twentieth Century).   This assessment was developed in consultation with the Missouri River fisheries biologist for the state of Nebraska.  

Fish consumption uses remain “not assessed” due to the lack of recent fish contaminant monitoring in this river segment.