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Table 12.04.04-1 <br />Private Road Minimum Design Standards, <br />Design Private Rural Road <br />Elements Average Lot Size <= 10.0 acres <br />Number of 3-14 15-30 <br />Parcels or Units <br />Minimum <br />Easement <br />Width <br />Paved Apron <br />Roadway Width <br />Shoulder Width <br />Minimum <br />Centerline <br />Radius (ft) <br />Surfacing <br />Requirements <br />Minimum <br />Crushed <br />Surfacing <br />Maximum <br />Grade (%) <br />C ,l de <br />Turnaround <br />Required <br />Approach <br />50 50 <br />Private Road <br />Avg. Lot Size <br />> 10 acres <br />31 + 2+ <br />50 50 <br />Req'd Req'd Req'd Req'd <br />20' 22' 22' 20' <br />1' 1' 2' 1' <br />60 60 60 60 <br />Gravel <br />BST/ACP <br />BST/ACP <br />Gravel <br />4-6" <br />4-6" <br />4-6" <br />4-6" <br />10 10 10 10 <br />Req'd Req'd Req'd Req'd <br />Req'd Req'd Req'd Req'd <br />SDOT & WSDOT & WSDOT & WSDOT & <br />J Distance AASHTO AASHTO AASHTO AASHTO <br />Ditch Slope 2:1 2:1 2:1 2:1 <br />(inside slope) <br />12.04.04.060 Geotechnical Investigation. <br />If required, geotechnical conditions shall be investigated and tested in accordance with the latest edition, <br />as amended versions of the WSDOT Geotechnical Design Manual or AASHTO Design Manual. The County <br />Engineer may require additional geotechnical investigation based upon specific site conditions. All <br />geotechnical work shall be completed by a geotechnical engineer licensed in the State of Washington. <br />Title 12 Kittitas County Code I Draft No. 5— Working Draft forAdoption 1011212023 <br />45 <br />