Laserfiche WebLink
3 <br /> <br />and a storm water treatment pond. The proposed rate is less than 80% of the existing rate of <br />runoff. <br /> <br />Water quality treatment is accomplished at the single stormwater treatment pond. True <br />infiltration was considered during the design phase, but several factors contributed to not <br />pursuing infiltration practices. First, shallow groundwater exists on site. Secondly, the site has <br />been maximized and there is not adequate space for effective infiltration practices. <br /> <br />Instead, a stormwater pond was to be constructed. The stormwater pond, in addition to <br />providing rate control, has been sized to provide adequate dead storage to meet water quality <br />requirements. Finally, an irrigation pumping station will be constructed at the stormwater pond <br />to draw water from the pond to irrigate the surrounding areas. <br /> <br />The clubhouse was strategically located adjacent to the landscaped stormwater pond as a site <br />amenity. <br /> <br />Proposed PUD Amendment #1 to Site Plan and Grading & Drainage Plan <br /> <br />The amendment proposes to omit the stand-alone clubhouse and associated parking lot and <br />expand the size of the stormwater pond. Per the applicant’s March 9, 2020 PUD Amendment <br />Narrative: <br /> <br />“The following changes have been made to the original PUD Application: <br /> <br />• Rice Creek Watershed District’s (RCWD) sent comments to the design team on 4/12/2019, <br />regarding the proposed pond. The normal water level (NWL) of the pond was questioned <br />by both RCWD and the city of Lino Lakes due to high groundwater table. Lyngblomsten <br />hired Braun Intertec in April of 2019 to monitor the site’s groundwater. We discussed these <br />findings with the city, and as the result, had to propose addition site storage to satisfy <br />RCWD’s comments. There are two options to accommodate the additional stormwater <br />storage: <br />o A second pond would be required. However, the location of the second pond would <br />have to be in the commercial parcel, limiting the developable land and restricting <br />how much development could occur on the commercial parcel. The city has long <br />seen this intersection as the gateway to Lino Lakes and the neighborhood oriented <br />commercial amenities have been consistently identified by the neighborhood and <br />city leadership as one of the major benefits of this project. <br />o Therefore, in lieu of the second pond, we are proposing adding the capacity to the <br />current central pond to accommodate additional impervious surface, including the <br />3+ acre corner lot, purchased after the original PUD application. In doing so, the <br />pond’s size increased significantly and would need to consume the area previously <br />allotted for the Clubhouse and its associated parking lot. <br /> <br />• The development and design team have successfully included all of the amenities from the <br />Clubhouse into the Town Center of the main senior living building. <br />o In the proposal presented to the neighborhood group in August of 2018, the amenity <br />and administrative spaces within the Clubhouse was approximately 4,450 square <br />feet. The Town Center at the time was approximately 10,200 square feet.