09/02/2008 Council Packet - Laserfiche WebLink

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• • • Upland runoff levels should be maintained so as not to negatively affect the few high and medium SWAG wetlands. These areas provide an opportunity to maintain wide multiple use upland buffers. RMP Future Conditions Recommendations: • The majority of flow in this unit comes from outside of the city and no further projects are proposed. Stormwater volume control will be an important issue because of the negative effects it causes to natural stream courses. • The high priority wetlands not associated with the creek should be a protected and buffered from planned land use. • The interstate creates a large wildlife barrier. Mn /DOT should be part of discussions about future opportunities to make this culvert a safer crossing for vehicles and wildlife. Upper Rice Creek RMU RMP Future Conditions Recommendations: • The Upper Rice Creek subwatershed within Lino Lakes was previously evaluated in the Repair Report for Judicial Ditch 4 and Resource Management Plan August, 2007. Catchments URC_001 and URC_002 were defined as part of catchments P_1 and B4_1, respectively, in that report. The report evaluated TP load from each catchment and identified URC_001 as in the middle one -third for TP load and URC_002 as the highest one -third of all areas evaluated. Wetlands throughout each catchment were classified as low restoration potential. Each catchment contains small areas of wetlands that are highly susceptible to stormwater discharge. This RMU is covered by the JD4 RMP Rule. • URC_001 and URC_002 are planned for industrial, commercial and medium density residential land use. Two areas become a concern under future land use scenarios and precautions must be taken to prevent flooding of major roads. o The first, and most important, is the culvert that conveys water from the private ditch south of 35W in URC_001 to JD4 on the north side of 35W. Another drainage route along the south side of 35W must be maintained under future developed conditions or overtopping of 35W could occur. Furthermore, this drainage route will likely see an increased frequency of use under future conditions due to increased flows from URC_001 and should be inspected regularly to assure that it is free of erosion. o The second area of concern is the private ditch crossing of 20th Ave N in URC_001. An outlet for this wetland occurs along the west side of 35E. This outlet must be maintained and regularly inspected when this drainage area develops to avoid overtopping at 20th Ave N. 10 -31