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Ms. Katie Larsen 08/05/2020 Page 2 The Lyngblomsten development is proposing grading of the entire site in one phase. This includes protection of an existing wetland, grading a new storm water pond, and grading roadway and site pads. The applicant shall call out the emergency overland flow (EOF) elevation (with a flow arrow) on the grading plan for the proposed pond and the existing wetland. The EOF should be 1 foot above the HWL and 3.0 feet below the lowest adjacent building opening elevation. EOF and flow arrows have been added to the grading plan. EOT- and high water level elevations hare been verified per the city comment. The low floor/opening elevations need to be labeled on the grading plan. The EOF will need to be further reviewed once other comments are addressed. It appears the trail may be blocking the EOF from the pond and culvert should be considered under the trail. Similar to the utility plan layering comment, we have been told via email to take spot elevations off of the grading plan to help with legibility. For this reason, the overall grading plan has spot elevations on to help with the above comment, but the north and south grading plan sheets do not have spot elevations shown. (AJA 2020-05.08) Low floor elevations and spot elevations should be two different labels. Please add the low floor elevation information to the lots on the north and south grading plan sheets. See Woods Edge example sent previously. AJA 7/11/2020: LOW FLOOR ELEVATIONS HAVE BEEN ADDED Update C1.30 to match what was sent to Kelsey Gelhar via email on Tuesday, July 28, by Bill Diede, which showed the FFE elevations on the individual townhome lots. The applicant should provide proposed centerline street grades (either grading sheets, or in profile on street plan sheet). Profile sheets will be accomplished in the final plat phase. In the meantime, percent of slope along the gutter or centerline have been shown on the drawings Centerline profile views were not provided with final plat documents. Applicant shall submit centerline profile views that include grade and vertical curve information for review. See Woods Edge example sent via email. AJA 7/11/2020: CENTERLINE PROFILES CREATED FOR ALL STREETS. REFER TO SHEETS C1.98, C1.99, C1.100. Applicant to provide proposed profiles for all proposed streets that show vertical curve information per City ordinance. The SWPPP is being reviewed by the City's Environmental Coordinator. Please provide the complete SWPPP narrative. The applicant shall clearly label the top and bottom of the retaining wall along the pond. Retaining walls over 4 feet require a licensed engineering design and an approved fence. This information has been provided on sheets C1.30-C1.32. (AJA 2020-05.08) Please provide with the final plat documents a licensed engineering design for the retaining walls over 4-ft in height. Lyngblomsten Preliminary Plat Engineering Review