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2. MATTAMY HOMES WATER REUSE 2.1 INTRODUCTION 2.1.1 Authorization On June 8, 2015, the City of Lino Lakes City Council authorized the preparation of a feasibility report for the Mattamy Homes Water Reuse project. 2.1.2 Scope The Mattamy Homes Development includes a large storm water storage area that can be used as an irrigation source. The proposed project includes storm water used for irrigating the development. This report evaluates several options for water reuse and considers water resources, cost, regulatory requirements, and value of the reuse irrigation system. 2.1.3 Data Available Information and materials used in the preparation of this report include the following: • City of Lino Lakes Comprehensive Plan • City of Lino Lakes Base Map and/or Topography Maps • Minnesota Department of Natural Resources Water Usage Reports • Grading plans and plat for the Mattamy Homes development 2.2 GENERAL BACKGROUND 2.2.1 Project Location The Mattamy Homes Development is located in the City of Lino Lakes, west of Interstate 35E, east of 20th Avenue North, north of Main Street, and south of the bounds extended by 77th Street East. A map showing the project area can be found in Figure 1, Appendix A of this report. 2.2.2 Existing Conditions The existing land use at Mattamy Homes is agricultural, with stormwater currently running through the site via Anoka County Ditch 55 (ACD -55) and Anoka County Ditch 72 (ACD -72). These ditch systems receive storm water runoff from watersheds located in the cities of Hugo and Lino Lakes and discharge to Peltier Lake. A study is being completed to address the surface water in the NE area or Lino Lakes. This report assumes that ditch water is not available as a source for irrigation and will be addressed through the NE Drainage Study. 2.2.3 Stormwater Management The Rice Creek Watershed District (RCWD) Rules state that stormwater volume and rate control must occur in any location with new or reconstructed impervious surfaces, such as the Mattamy development. Stormwater infiltration is the preferred method of volume control. Prior to this feasibility study, an analysis was conducted to determine if the site was suitable for infiltration. Because a large portion of the site is within a vulnerable portion of the Drinking Water Supply Management Area (DWSMA), and the Minnesota Department of Health recommends that infiltration not occur in a vulnerable DWSMA, it Feasibility Report Mattamy Homes Water Reuse WSB Project No. 2988-01