Agenda - Council Work Session - 09/13/2011

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DRAFT 8-9-2011 o The installation of stormwater conveyances, such as outfalls, or grading necessary for hydrologic safeguards, such as emergency overflows. If portions of a wetland are to be lawfully filled or drained during the construction process through a MN Wetland Conservation Act permit, the area of wetland protections shall be placed at that new wetland boundary. In this case it does not make sense to place the silt fence 16 feet from the new old wetland boundary, because this would be within the area that is being filled or drained. Instead, the protections should be placed at the new wetland boundary. This applies only to the portion of the wetland edge where lawful wetland impact will occur during the construction process. The provisions listed above apply until construction (including grading and building) is complete, the site is stabilized, and vegetation has been established in the project areal , , Comment Its]: See s above Native Plant Seeding in Common Spaces at the Conclusion of Construction Within common spaces, areas adjacent to wetlands that are disturbed through the construction process and ponding areas (stormwater management areas) should be seeded with a MN Board of Water and Soil Resources (BWSR) native seed mix, or approved equaA which matches site conditions. Common spaces , - Comment [TW9]: SCHURBON - BWSR and include outlots, areas transferred to city ownership, homeowners association common space, and similar. MNDOT have approved a dizzying array of mixes This seeding should be done as part of site stabilization following construction. Site preparation and for many conditions. Most nurseries mix specifically for this. The only reason someone seeding should be consistent with BWSR guidance. would try to use something else is if they were trying to get around the intent of the approved mixes The extent of seeding around wetlands shall be reviewed by the LRRWMO Board and determined on a (stability, diversity, local ecotype, etc). case by case basis. Decision making will be based on the following guidance: • All areas that will be idle for one year or more and are within 100 feet of a wetland boundary should be seeded with the native plant mix. • Seeding all areas that will be idle for one year or more, even if more distant from the wetland, is encouraged for wildlife benefits, lower long-term maintenance, and aesthetics. Native plant seeding adjacent to stormwater management areas is also encouraged. - - - Comment [t10]: HlMMER - Encouraged or required'? • Areas where the city or land manager plans an active land use inconsistent with unmowed SCHURBON —encouraged. vegetation can be excluded from the native plant seeding requirement. For example, if an area is planned to be developed into a playground within one year, native plant seeding need not occur. • Seeding should only occur within the 16 foot wide area around the wetland that was left undisturbed during construction if it is dominated by invasive or noxious weeds. In all other cases this area should remain undisturbed. l The LRRWMO does not require this native plant seeding to be maintained. Native plants are favored in areas near wetlands and on idle lands because of their benefits to wildlife and water quality. However if the desired use or landscaping of the area changes, the vegetation may be replaced without any restrictions or penalties imposed by the LRRWMO. i These provisions do not apply to private properties; they only apply to common spaces. , Wetland Protections After Construction Following construction, site stabilization, and vegetation establishment �ertain activities shall be prohibited within 16 feet of the wetland edge. Activities prohibited include: • Structures, including �encesL • Paving, except projects with a public purpose such as public trails. ; • Retaining wallsl. i J LRRWMO Wetland Protection Standards page 4 Comment [t11]: SCHURBON - Are we now requiring native seed if the area is dominated by invasives? SCHURBON — NO. This is "guidance" to be considered on a "case by case basis." Comment [t12]: Here's where each City may have different allowances within D&U estrus. & will ' probably be the biggest issue associated with these rules. Comment [t13]: Are currently allowed in D&U esmts in Ramsey as long as they do not impede/alter drainage patterns. SCHURBON — As Berkowitz said — there may be some minor changes each city make need to make. Comment [t14]: See 11 above Comment [t15]: Are currently not permitted ' (unless structural), so how do we make sure they're not constructed in estrus. (knee walls, landscape beds, etc.)? SCHURBON- The same could be said for fertilizing or yard waste disposal. As Full said, this comes often just comes down to making residents aware, as is good practice to make them aware of all things related to the DU easement. Then enforce when receive citizen complaints. No need to patrol.