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Mr. Patrick Klaers <br />December 10, 1996 <br />Page Three <br /> <br />the north and south side of CSAH 1 respectively. Retaining walls and head walls <br />would be required on both sides of the underpass to a point where 4:1 side slopes <br />could be constructed. <br /> <br />The required underpass length is approximately 130 feet. Due to the required <br />length of a proposed underpass, safety is an important issue. Police Chief Tom <br />Zerwas, expressed concern over the safety and security of an underpass. An <br />underpass would provide an area for potential crime, loitering, and harassment of <br />pedestrians that would be difficult to monitor by the police department. Adequate <br />lighting would be required to ensure that a user of the structure could see <br />completely through it before entering. For these reasons, Chief Zerwas said he <br />would be strongly opposed to an underpass. <br /> <br />Another issue to address is that of drainage within the underpass. Drain grates <br />would be required within the structure to collect runoff from the surrounding area. <br />A lift station would be required to pump collected runoff to a ditch or nearby <br />storm sewer system. <br /> <br />A soils investigation has been performed to determine the soil conditions present. <br />Due to the fill material that is present from the construction of trunk sanitary <br />sewer, sub-cutting and recompaction of existing material would be required to <br />provide the necessary stability and support. Dewatering of trenches may also be <br />required, depending on the seasonal level of the groundwater table. <br /> <br />ESTIMATED COSTS <br /> <br />Below is a breakdown of estimated costs associated with the construction of a <br />grade-separated crossing of CSAH 1: <br /> <br />Pedestrian Overpass with Structural Ramps <br /> Construction Cost $525,000.00 <br /> Overhead (28 %) $147.000.00 <br /> Project Cost $672,000.00 <br /> <br />Pedestrian Overpass with Embankments <br /> Construction Cost $298,500.00 <br /> Overhead (28 %) $83,580.00 <br /> Project Cost $382,080.00 <br /> <br />Pedestrian Underpass <br /> Construction Cost <br /> Overhead (28 %) <br /> Project Cost <br /> <br />$286,150.00 <br /> $80.122.00 <br />$366,272.00 <br /> <br />230/213 -0917. dec <br /> <br /> <br />