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Surfacing <br />Gravel <br />Gravel <br />BST/ACP <br />Gravel <br />Requirements4 <br />Minimum Crushed <br />N/A <br />6" <br />6" <br />6" <br />Surfacing, <br />Maximum Grade % 6 <br />15 <br />10 <br />10 <br />10 <br />Cul-de-Sac Required <br />N/A <br />Req'd <br />Req'd <br />Req'd <br />County Road Approach <br />Req'd <br />Req'd <br />Req'd <br />Req'd <br />Permit <br />Stopping Site Distance <br />N/A <br />AASHTO <br />AASHTO <br />AASHTO <br />Ditch Slope (inside <br />2:1 <br />2:1 <br />2:1 <br />2:1 <br />slope) <br />'Applies to all roads accessing existing paved roadway. <br />'All private roads shall be inspected and certified by a civil engineer licensed in the State of <br />Washington for conformance with the current edition of the Kittitas County Road Standards <br />'Existing road easements may be a minimum of 40'. New road easements shall be a minimum of 60'. <br />Existing driveway easements may a minimum of 20'. New driveway easements shall be a minimum of <br />30'. <br />4Crushed surfacing per WSDOT Standard Specifications. <br />'Additional depth may be required for roads that are to be public roads. <br />6A variance request is required for private road grades between 10-12% <br />Table 4-4B <br />Driveway Design Standards <br />Minimum Driveway Standards <br />Length <br />Grade <br />Required Minimum Surfacing <br />Required Minimum Width <br /><150 <br />10% or less <br />Gravel compacted surface <br />12 feet <br />> 150 <br />10% or less <br />Gravel compacted surface <br />16 feet with two foot clear zone on each side <br />Single and Joint -Use Driveway Mitigation Options Due to Grades Exceeding 10% <br /><100 <br />10% — 16% <br />Gravel compacted surface <br />20 feet <br /><100 <br /><16% <br />Asphalt or concrete paving <br />20 feet <br />> 100 10% -- 12% Asphalt or concrete paving 16 feet with two foot clear zone on each side <br />