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Comprehensive Stormwater Management Plan Northeast Lino Lakes Drainage Improvement Project WSB Project No. 2929-79 Page 7 Land Use Hugo East Central West Lino Total CSMP Total Major Highway 0.0 13.6 24.8 0.0 38.4 38.4 Park, Recreational, or Preserve 15.4 0.0 0.0 0.0 0 15.4 Retail and Other Commercial 0.0 1.5 0.0 0.0 1.5 1.5 Single Family Attached 21.2 0.0 0.0 0.0 0 21.2 Single Family Detached 32.5 6.0 7.8 4.2 18.0 50.5 Undeveloped 82.1 119.5 13.7 49.9 183.1 265.2 Total Areas 215.6 533.9 447.3 152.5 1,133.7 1,349.3 2.4 Soils and Geology Soils in the CSMP area are mapped as primarily loam and sandy loam. Depressions and areas adjacent to Peltier lake are mapped as peat or muck (Figure 8, Appendix A) (Soil Survey Staff 2017). The surficial geology of the CSMP area is loamy till with peat and muck around Peltier Lake and in isolate pockets (Figure 9, Appendix A). The loamy till is from the New Ulm formation and is chiefly loam texture with unsorted sediment. Peat and muck was deposited in the quaternary era and is composed of partially decomposed organic matter deposited in marshes. Peat and muck also includes fine grained organic matter laid down in ponded water and marl (Setterholm 2013). 2.5 Groundwater Groundwater within the CSMP is generally close to the ground surface. The Minnesota Department of Natural Resources (MnDNR) modeled much of the project area as having a depth to the water table as 0- 10 feet (MnDNR 2017) and the NRCS soils data shows the annual minimum depth to groundwater table to be less than 2.3 feet below the ground surface for the entire study area (NRCS 2017). Groundwater reaches the surface at Peltier Lake, the wetlands around Peltier Lake and within closed depressions. 2.6 Surface Water Hydrology Surface water in the study area ultimately drains to the Rice Creek Chain of Lakes through Peltier Lake, Rice Creek, Hardwood Creek (Jurisdictional Ditch 2), Clearwater Creek (Jurisdictional Ditch 3), Anoka County Ditch 55 and Anoka County Ditch 72, as shown on Figure 1, Appendix A. 2.6.1 I-35E Construction I- 35E, running from Burnsville, through Lino Lakes, and ending in Columbus was constructed in 1970. The construction of the four-lane highway effectively separated the East and Central CSMP regions by placing fill to elevate the roadway through swamp sections (Minnesota Department of Transportation 1972). While the two regions remain connected by the 10-inch and 12-inch drain tiles on ACD 55 Branch 8 and Main Trunks, Interstate I-35E acts as a berm preventing overland flows from flowing downstream from the east to west. 2.6.2 Drain tile systems The ditch and tile network was developed to manage stormwater runoff and to keep fields dry during the growing season. They have significantly altered drainage basins and changed the pre-settlement subwatershed divides. The existing capacity of the tile networks are insufficient to convey stormwater runoff from future development within the Northeast Drainage Area. Alterations to the ditch and drain tile system must go through legal proceedings as defined under Minnesota Statutes 103E, to ensure ditch capacity and landowner drainage rights are preserved. The properties that are serviced by the ditch system are entitled to the benefits of the drainage system and, in effect, own the drain tile system under Minnesota Statutes 103E. The drainage of the systems must be