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<br /> <br /> <br />Feasibility Report <br />Northeast Lino Lakes Drainage Improvement Project <br />WSB Project No. 02029-790 Page 7 <br />4. PROPOSED IMPROVEMENTS <br /> <br />4.1. Alternatives Considered <br /> <br />In consideration of the City’s Comprehensive Plan where this area is guided for urban and mixed <br />uses (Appendix A, Figure 5) it was determined that the existing drainage system would need to <br />be addressed. Through the CSMP multiple alternatives were considered based on the needs of <br />the area (Table 2). <br /> <br />Table 2. Full Build-Out Proposed Land Uses <br />Land Use Area <br />(acres) <br />Commercial 82 <br />Industrial 350 <br />Mixed Use 345 <br />Open Space/Conservation 238 <br />Right-of-Way 43 <br />Rural Residential 6 <br />Single Family Detached 82 <br />Single Family Attached 117 <br />Medium-Density Residential 90 <br />High-Density Residential 19 <br />TOTAL 1,373 <br /> <br />As the existing county drain system is not sufficient to handle the increased runoff from a <br />developed watershed. Options were considered to provide capacity for development, with the <br />goal of limiting adverse impacts to downstream landowners and natural resources. The <br />following options are discussed in further detail in Appendix F. <br /> <br />Option 1: Existing System to Remain <br />The existing system is in need of maintenance, and RCWD completed study in 2014 outlining <br />system improvements. The capacity of the existing system is not sufficient to develop the area <br />as established in the City of Lino Lakes Comprehensive Plan. For property owners to make <br />improvements in this drainage area, per RCWD rules, they may need to dedicate up to 40% of <br />their developable land for stormwater management, including ponding of back-to-back 100-year <br />flood events and infiltration requirements. This area has tight soils and infiltration options are <br />costly and limited. Spray irrigation is temporarily being used to meet the requirements at the <br />McDonald’s site until a regional BMP is constructed. <br /> <br />The existing system does not provide treatment upstream of Peltier Lake which is classified as an <br />impaired waterbody. Any proposed project must not impair water quality or flood storage within <br />or downstream of Peltier Lake. <br /> <br />Option 2: Outlet to Clearwater Creek <br />This option considered the lands drained by ACD 55 to the east of I-35E and proposed to reroute <br />the drainage to the south, via storm pipe, to Clearwater Creek (Appendix A, Figure 6). This