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I <br />I <br />I <br />r <br />r <br />I <br />I f <br />I t <br />> 1 <br />I • <br />M <br />M <br />H <br />M <br />M <br />M <br />H <br />i; <br />L <br />B <br />Constructed wetlands have potential benefits as well as drawbacks. Additionally, <br />the cost of constructing stormwater ponds and storm sewer systems is enormous <br />compared to the cost of wetland preservation. <br />New nutrient management technologies such as NURP ponds or alum treatments <br />will give Orono an added tool to manage runoff from rural densities, but Orono <br />cannot and will not rely solely on man-made systems for preserving water quality. <br />Orono's land forms are highly varied as the result of four separate glacial <br />scourings. Surface features include islands, peninsulas, narrow land bridges, the <br />lakes, bays and marshes, and a few shallow outwash basins. The highest elevations <br />range from about 1060 feet above mean sea level in the northern part of the City <br />down to the normal water level of Lake Minnetonka at elevation 929.4 MSL. Steep <br />slopes and numerous glacial depressions add interest to the City's landscape but <br />cause developmental limitations. <br />The soils in the City of Orono originated from drift materials deposited by <br />meltwaters of the glaciers. Due to the range in type and location of deposited <br />materials, the composition of the soils are complex and highly varied. Generally, the <br />soil types consist primarily of clay materials on the uplands and organic, wet <br />materials in the lowland areas. Consequently, the ability of each soil type to <br />adequately accommodate development varies considerably in Orono. Careful <br />examination of each site is needed to determine the most appropriate land use for <br />individual properties. <br />FIGURE <br />SOILS MAP <br />CMP3A- 10