01/29/2020 Environmental Board Minutes

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Environmental Board January 29, 2020 Page 2 DRAFT MINUTES VII. ACTION ITEMS – A. Preliminary Plat for Nadeau Acres A preliminary plat land use application for Nadeau Acres. The proposed residential development is a 69 single-family lot subdivision located north of CSAH 34 (Birch St) and west of CSAH 54 (20th Ave). It contains two parcels totaling approximately 33 acres. The applicant is proposing an R-1, single-family residential development on standard 80 foot wide lots. The site is bounded by single-family homes on the north, east, south, and agricultural land to the west. The majority of the site is hayfield composed of alfalfa and other grasses. Potential for rare species is low due to site condition. An overhead electric utility corridor runs from the southwest to the northeast. The City Engineer is reviewing the submitted Stormwater management plan. The following general review is adapted from the December 6, 2019 Stormwater Management Plan. The stormwater on the site currently flows to three locations: the majority drains to a private ditch/wetland to the north of the site, the western part of the site drains to a private ditch to the northwest, and a small southern portion of the site drains to an existing culvert that runs along Birch Street. The proposed conditions will include three new ponds. Pond 100 in the northwest will collect water from the majority of the site and discharge to the private ditch to the west. Pond 200 will collect water from the south portion of the site and direct it to Pond 100. Pond 400 in the northeast will discharge to the existing ditch to the north. Stormwater Pollution Prevention Plan has been submitted and will be reviewed with final construction plans. The site does not fall within the flood management zone. Wetland 1 is 0.05 acre of wet meadow. This wetland is proposed to be filled. Wetland 2 is 1.32 acres of partially drained wet meadow and scrub wetland. Southeast and southwest portion of this wetland totaling approximately 0.65 acre is proposed to be filled.