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• Mr. Chris Leeseberg <br /> April 17, 2002 <br /> Page Two <br /> The house location on Lot 3, Block 1, would require a relatively steep driveway. A <br /> driveway meeting the City Ordinance requirements for grade should be shown on the <br /> drawing to ensure that it can be accomplished with the home site in this location. If it <br /> cannot be accomplished, the home site should be moved to a more suitable location <br /> relative to the driveway grade. <br /> The house pad location and elevation shown on Lot 4, Block 1, will require 10 feet of fill or <br /> a retaining wall at the northeast corner. Additional grading and/or a retaining wall should <br /> be shown on this lot to ensure that the home can be constructed. <br /> 5. At the staff review meeting, the comment was made that perhaps a requirement of this plat <br /> should be to build the septic site prior to home construction, in an effort to minimize the <br /> removal and disruption of trees. If the septic site is built first, access to that site could be <br /> accomplished through the home building site. <br /> 6. Storm runoff from the street is collected in the cul-de-sac and at the intersection with <br /> Proctor Avenue and conveyed to natural low areas with no outlet. The inlet and storm <br /> sewer system from the cul-de-sac will be down a very steep grade. It will be difficult to <br /> maintain that grade after the trees are removed. Detail needs to be provided as to how <br /> • <br /> this slope will be maintained during and after construction. The same is true for both <br /> storm sewer systems at the outlet. The velocity of the water will be very great and a detail <br /> will need to be provided concerning erosion protection methods at the outlets. <br /> The storm sewer system from the cul-de-sac to the natural low area only has one catch <br /> basin. If this catch basin is plugged, the natural overflow will be through Lot 3, Block 1. <br /> An easement will be needed to encompass the emergency overflow area. In addition, we <br /> would recommend that a second catch basin be installed in the cul-de-sac to add <br /> additional inlet capacity and lessen the opportunity for a plugged catch basin to cause <br /> water to overflow the curb line. <br /> If you have any questions regarding these comments, please call. <br /> Sincerely, <br /> Howard R. Green Company <br /> 7,,fraTerry J. rer, P.E. <br /> TJM:tw <br /> • <br /> Howarc R Green Company <br /> Ltr 4-17-02 Leeseberg CONSULTING ENGINEERS <br />