08/02/2006 Env Bd Packet - Laserfiche WebLink

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• • buckthorn in this wetland is removed, the ground will be basically bare. The City Native Seed Mix should be seeded into this area. Soils Soils are depicted on Attachment 15. The soils are upland, non - wetland types of soils, except where the wetland was delineated in the NW corner. The upland soils are highly permeable and should be used to the greatest extent possible to infiltrate storm water. On the other hand, precautions should be taken with these soils when proposing fueling stations. A fueling site spill containment area should be designed into the plan if this fueling station goes forward. A requirement of this and every project in Lino Lakes is that no soils are to be imported or exported without City approval. Surface Water Surface water from this site, flows to Baldwin Lake. The Developer is proposing to route excess water over to Woodridge Lane and than into a wetland complex to the West. This would change the sub watershed water flow for this area. In Tight that direct discharge into wetlands may not be allowed in the future, it is important to look at every opportunity to maintain the predevelopment water quantities as possible. Impervious parking areas must be kept to the minimum allowed under our City code. Parking lots are draining to catch basins. Instead of the pipe, maybe the design could mirror the HB Fuller model, or the use of ECS, and include a rain garden /infiltration area where the pipe is. Pervious pavers should be used on at least 10 % of the parking areas. Additional Bio- retention /rain - garden should replace the pipe going through the large parking area East of Bik. 1. Again, an ECS system would work here as well. Also, suggest day - lighting the storm pipe wrapping around Block 1 to the South and West to allow for infiltration These rain gardens could be connected to swales with additional rain - gardens in most areas. The design is using infiltration drain pipe in the pond areas that will infiltrate additional surface water. Rain gardens should be designed according to models set forth in the Maplewood rain garden design. The Town homes on the NW need additional distance added to existing residents houses. Again, day - lighting pipes into a series of rain gardens would be a highly effective way to infiltrate water. Drainage swales should have a low profile planting. Parking island bioretention /infiltration (if used), and rain garden areas (if used) should be designed and have a more formal design that is approved by the City. Access to all surface water treatment areas must be provided for and indicated on the plat proposal. A common maintenance agreement for maintaining planted surface water treatment train areas should be written and approved by the City.