Access. All private roads from mining sites to public highways, roads or streets shall be paved or graveled. All on-site roads and access roads from the site to a public road shall be designed, constructed, and maintained to accommodate the vehicles and equipment which use them. Whether paved or graveled, the roads shall be maintained by the applicant in accordance with county road standards. Before the applicant may exercise the privileges of the permit, the applicant shall provide a letter of agreement to the county to maintain the road to the applicable county road standards. If the applicant fails to provide the letter of agreement prior to exercising the privileges of the permit, or fails to so maintain the road, the applicant shall submit an agreement and security in accordance with CCC § 17.40.080 and § 17.40.090.