31-12-1 Established highway systems perpetuated. 31-12-2 Change of county highway system--Order of Department of Transportation. 31-12-3, 31-12-4. Repealed. 31-12-5 Supervision of construction, improvement, maintenance, and repair of system. 31-12-6 County system at expense of entire county--Tax levy. 31-12-7 Division of system into sections--Recording in county road book or database. 31-12-8 Survey and report by superintendent on condition of system and structures. 31-12-9 Survey, plans, specifications, and estimates for permanent improvements. 31-12-10 Repealed. 31-12-11 Commencement of construction work. 31-12-12 Small projects--Advertising, private contract, or county work permitted. 31-12-13 Large projects--Advertising for bids or built by day labor--Rejection of bids. 31-12-14 Deadline for bids--Advertisement--Rejection of bids. 31-12-15 Written contract--Performance bond. 31-12-16 Progress payments permitted. 31-12-17 Superintendent's approval of bills before payment. 31-12-18 Width of culverts. 31-12-19 Repealed. 31-12-20 Repealed. 31-12-21 to 31-12-23. Repealed . 31-12-24 Supervision of maintenance work by superintendent--Payments from road and bridge fund. 31-12-25 Establishment of witness corners required--Violation as petty offense. 31-12-26 Responsibility for secondary roads in unorganized territory. 31-12-27 Tax levy for secondary roads in unorganized territory. 31-12-27.1 Contracts with residents for county road construction and maintenance--Petition--Work performed by highway department or private contract--Payment. 31-12-28 to 31-12-40. Repealed . 31-12-41 Contracts for county maintenance of streets and alleys in municipalities. 31-12-42 Vehicle license collections to be used outside municipalities. 31-12-43 Indemnity required for construction or survey work within road right-of-way. 31-12-44 Repairs for wind and water erosion assessed to private landowner. 31-12-45 Approval of conservation district for repair of erosion damage--declaration--notice to landowner. 31-12-46 Minimum maintenance roads established . 31-12-47 Posting notification of minimum maintenance road. 31-12-48 Designation of no maintenance highway--Removal of manmade obstruction. 31-12-49 Posting of signs along no maintenance highway. 31-12-50 No maintenance highway open to public access--No duty to maintain or improve.