Agenda Packets - 1997/12/08 - Laserfiche WebLink

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6/22/81 - Mcnndsview Square -2- Lino urban land complex plex 0-370 slope. • This is a level to very gently sloping soil complex found on glacial outwash plains. It consists of urban lands and the somewhat poorly drained Lino soils. The typical pedon will have a dark grayish brown loamy fine sand surface layer about nine inches thick. The subsurface soil is approximately 27 inches thick with a pale brown, mottled loamy fine sand top layer and a light brownish gray mottled find sand lower layer. Mottling is an indication of a high water table saturating the soils most of the year. Permeability of the Lino soils is rapid. The available water capacity is low due to the rapid permeability. Natural fertility and organic matter content is law. The seasonal high water table is between 2 and 4 feet below the surface. The Lino soils are fairly suitable for building site development; wetness due to the high water table is a problem though. Where possible, buildings should not have basements. If basements are constructed, it will be necessary to tile drain and waterproof foundations. Lino soils are moderately susceptible to frost heave; thus, streets and sidewalks should be designed to compensate this action. Lawns, trees and shrubs will be difficult to establish due to the low fertility and high water table. Seelyeville muck. This soil is generally level and very poorly drained. It occurs in bogs an plane or slightly concave side slopes within glacial outwash plains or moraines. This soil is subject to flooding from runoff off of adjacent • steeper mineral soils. The typical pedon consists of a surface layer which is black muck about 7 inches. The middle layer is stratified dark brown to black mucky peat 36 inches deep. The bottom layer is very dark brown muck. The Seelyeville soil has moderately rapid permeability; available water capacity is very high; runoff is very slow; organic matter is very high and natural fertility is low. The water table is generally between the surface and two feet below. . This soil is poorly suited to building site development because organic soils are very subject to frost heave, flooding, poor struc- tural stability and high water table. It is not advisable to build in organic soil areas. Water Resources The major water resource of the proposed plat is a wetland and its varying habitats located at the sites northwest quarter. This wetland area is part of a larger wetland system approximately 10.3 acres in size. The direct drainage area to this wetland is 134.1 acres. The outlet to this wetland is a ditch system to Rice Creek located to the east. On site inspection indicated the water table between the 904 and 902 contours as lying between 1 and 3 feet below the surface. III. Sugary and Recommendations 1. Exposed soils should be stabilized as soon as possible following rough grading. Recommendations for vegetative stabilization are given in Appendix.