5.5. SR 08-06-2007 - Laserfiche WebLink

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Gregory J. Wilson (cont.) Mississippi River Watershed Management Organization (LMRWMO). The water quality modeling and subsequent feasibility studies are intended to identify the hot spots for nutrient loading to the Mississippi River and to identify if the recommended water-quality improvement measures are appropriate and feasible. The water quality modeling was completed using the P8 Urban Catchment Model and PONDNET. · Providing review and comment on the Bloomington Airport South District AUAR and the Storm Water Treatment Feasibility Study for the U.S. Fish and Wildlife Service, Minnesota Valley National Wildlife Refuge. This review included a critique of the approach, completeness, direction, proposed solutions, methods, and logic of the feasibility study analysis, as well as the P8 water quality modeling developed as part of the stormwater treatment feasibllity study. Recommendations were made for improvements to the modeling and to the proposed stormwater treatment system design. Most of the recommended improvements incorporated low-impact development and pollution-prevention design principles that had not been previously considered. · Managing storm water-runoff water-quality-monitoring study of Gervais Mill Pond and Owasso Basin in Little Canada, Minnesota, to evaluate effectiveness of phosphorus and suspended sediment removal in smaller detention ponds. Monitoring of the primary inlet, outlet, and eight minor inlets showed that the outlet total suspended solids (TSS) and total phosphorus (TP) concentrations were generally higher than the concentrations observed at the primary inlet, and that runoff is likely being short-circuited through Owasso Basin. As a follow-up to this study, the P8 Urban Catchment Model was calibrated to the observed monitoring data and an assessment of potential improvements to the water-quality treatment performance of Owasso Basin was done, assuming fully developed land-use conditions in the watershed. This assessment included a discussion of the benefits, limitations, and feasibility ?f potential water-quality treatment improvements. · Providing expert testimony regarding the regional fecal coliform total maximum daily load (TMDL) for the Lower Mississippi River Basin at the MPCA citizens' board meeting contested-case hearing on behalf of the Minnesota Center for Environmental Advocacy (MCEA). This testimony involved the technical review of the TMDL document to verify that water quality standards would be met, a margin of safety was provided, and load and waste load allocations were properly established and provided a reasonable assurance that each of the water bodies would comply with the water quality standards. · Performing water quality mass-balance modeling to evaluate alternative uses for agricultural lands in the Minnesota River floodplain for the American Rivers organization. The study involved the use of published water-quality constituent export-rate coefficients to determine the effects of switching from Barr Engineering Company