12/19/2001 Environmental Board Minutes

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ENVIRONMENTAL BOARD MEETING DECEMBER 19, 2001 grading plan/preliminary plat was submitted. The first plan should not have been reviewed. Two lots in the southeast would require fill in the new plan. Two items not included in the plan are the DNR ordinary high water line (OHW), and future soil disturbance issues within the "Tree Preservation Limits." Staff stated that the site was located in a Lake Protection Zone where no suggested development should occur, and a High Ecological Zone where protection strategies should be used to protect the surrounding resources. These zones are defined in the Lino Lakes Environmental Management Plan. The island is land cover classified as a recently developed forest in the Lino Lakes Environmental Managementpan. This classification does exist on the outside perimeter of the island. upland portions of the island are however covered with older growth burr and whrc oak, ash, hackberry, and northern black cherry. The island is surrounded1, cattai1nmrsh and shrub thicket. The island was surrounded by a PSS1/EM Cd and. Wards Lake is public waters and is situated in a Natural Environment Basin. Wat on all directions flow into Wards Lake and then go into Rcshaniu LakeAT basin area of the Rice Creek Chain of Lakes Park is static. Water ho . lap ty of the basin is thus also limited. There was a discussion about a 290 foo ecommendation on the island. The buffer recommendation is suggested .irthe'Lind Lakes Environmental Handbook. There was a discussion of surface w teLniftngement and trying to reduce 44"., Ve144.1-241The,' hydraulic pulsing. It was suggested that the deve techniques such as those described in the Barr Engineering/Met Co, *delineg. It was suggested that the same Barr Engineering/Met Council guidiines cold be used to reduce surface water volume evacuation, and pollution reduction, as wd ' ',as for site protection. There was a discussion of the need for the pond to b�.c1:.ed for infiltration reasons. There was I discussion of the northern p ; ed swale. It was stated that the swale should ,NErf be moved to the South side of ;is .CE , ere was a discussion of lot reduction on the East Side of the island so ctiolial infiltration area might be designed. There was a discussion ofc>1iisteringuses as an alternative design. It was suggested that lots should be designed infiltration as much as possible. Suggested guidelines for this are‘sT,ipa sin the Barr Engineering/Met Council Guidelines. There yis idisciissidh ab. t the not yet defined soil disturbance areas on the island with esen . A tree inventory is required according to the Tree Ordinance. The.wisdiscussion of the need to plant natural vegetation, and that a R4-1' Ian would need to be submitted. A protection and _ manageme eloped for all tree, natural vegetation, infiltration, and water areas. 0'erwas discussion about the desire to develop a natural environment information s cct for all new residents moving on to the island. The need to regulate the use of buffel*d protection areas was discussed. Staff recommendations followed: 1. Redesign Surface Water Plan. Use techniques such as are suggested in the Barr Engineering BMP Manual. Reduce hydraulic spiking and increase infiltration in ponding situations. Use infiltration/ponding design in areas where they would be effective and non-polluting. Ponds 1 and 2 do not work as designed. 2. Reduce lots/or cluster houses. Use rest of the Island for surface water treatment including buffering. 2