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The standards for private roads are generally adequate and appropriate. Several <br />additions and clarifications are suggested. <br />A disclaimer should be inserted stating that the County is not responsible for the <br />safety of private roads. The crown slope standard should be defined more precisely. <br />Provision should be made for paved private roads. Paving of a short area, such as a <br />water crossing, would be considered as erosion protection rather than paving as defined <br />in theis section. Some further description of provision of two -way traffic is suggested. <br />We believe that the standard for an 18 percent maximum grade is excessively lenient, <br />since many developers will use minimum standards even where it is feasible to provide <br />less steep grades. Therefore, a 12 percent grade is shown as the maximum, with <br />provision for grades up to 15 percent under a variance procedure. The 15 percent <br />figure is consistent with county development standards. <br />Both the flares at intersections and the vertical grade at an intersection should be 50 <br />feet long to provide for adequate storage and tapers. <br />Culverts should be designed for a five -year design storm. (Typically drainage for <br />public roads requires design for a ten -year storm.) The reason for use of a five -year <br />design is to reduce culvert size and earthwork for roads carrying little traffic. The <br />stormwater design would have little effect on water quality, but could affect upstream <br />flooding. <br />LIF-1 <br />