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• <br /> consistent with the purpose and need of the project. In the two unavoidable wetland crossings, <br /> the following design measures were used to manage or reduce impacts: <br /> • Use of 3:1 side slopes on the road shoulder to reduce the fill footprint. <br /> • Choosing a 3-foot gravel shoulder with open ditch for road drainage to reduce the amount <br /> of impervious surface and filter runoff. <br /> 1) Wetland Fills <br /> A total of approximately 14,500 square feet (0.333 acres) of wetlands will be filled in two <br /> separate areas as shown in the accompanying exhibits. The total quantity of material <br /> discharged for cut and fill areas and cart paths will be1,300 cubic yards, consisting of <br /> subsoil, crushed gravel base course, and asphaltic pavement. Subsoil will be taken from <br /> upland areas onsite, while the base course and asphalt will be new materials. <br /> 2) Wetland Enhancements <br /> Within the southern conservation area, a total of 22,850 square feet (0.52 acres) of <br /> wetlands will be restored in Wetland Area, 2 as shown in the exhibits, by removing the <br /> demolition waste lying above the elevation of the adjacent wetlands. The purpose of this <br /> fill removal is to enhance the storm water functions and improve the aesthetic appearance <br /> of the area. Because this portion of Wetland Area 2 floods with up to 2 feet of water <br /> during the spring and early summer, an additional 2,208 cubic yards of water storage <br /> capacity will be provided by this action. <br /> The removal of wetland fill will also help meet the storm water control objectives for the <br /> project under NR 216 (see Section 2.B). <br /> B. Construction <br /> Construction of the access roads is anticipated to start in the Fall of 1997, with a total <br /> construction time of 3 weeks. <br /> 1) Erosion Control <br /> An erosion control plan will be developed to meet the criteria specified in NR 216.46. <br /> Erosion control measures will consist of silt fence, erosion bales, and timely seeding and <br /> mulching to prevent siltation of remaining wetland areas. Due to the gentle grades of the <br /> project area, no significant problems are foreseen in the installation and maintenance of <br /> these measures. <br /> Soils and fill material will be stockpiled in upland areas only, and will be surrounded with <br /> silt fence. Revegetation of unused soil stockpiles will occur after 14 working days, with <br /> seeding of final grades occurring no later than 7 working days after completion. <br /> Mead&Hunt <br /> C236A002\C236-97A\12-97 4 <br />