(A) Applicability. All applicable provisions of the standard specifications of the Indiana Department of Highways apply.
(B) Pavement width. The minimum width of the surface shall be 18 feet. The minimum width of alleys shall be 12 feet.
(C) Shoulders. The minimum width of the shoulder shall be two feet each side.
(D) Grade. The sub-grade shall be free of all vegetation and roots. Al embankments shall conform to good construction practices and shall be constructed of material that will compact readily when rolled with a ten-ton roller or equivalent vibratory roller. All material will be placed in nine-inch lifts. The sub-grade prior to the placement of stone or gravel shall be rolled with a ten-ton roller (minimum) or equivalent vibratory roller and all spongy and yielding material shall be replaced with material suitable for compaction. All top-soil shall be removed.
(E) Drainage structures for driveways. Minimum size is 12 inches by 20 feet (squash-type pipe). All drainage area and co-efficients shall be shown for storm drainage.
(F) Ditches. The minimum shall be one-foot below the outer edge of shoulder on a 2:1 slope and of sufficient size to carry the surface water. Slopes of over 4% may require additional precautions to avoid erosion and shall be approved by the County Highway Superintendent.
(G) Storm water run-off, seeding and sodding. All disturbed areas shall comply with state and local storm water run-off and erosion control measures and may need to be seeded to prevent erosion.
(H) Curbs and gutters.
(1) If a proposed subdivision lies adjacent to or between other subdivisions that have been provided with curb and gutter or if it averages more than three lots per gross acre, curb and gutter shall be installed on each side of the street surface.
(2) The Plan Commission shall require the installation of gutters along the boundaries of parking lots so far as necessary for drainage control or public safety.
(I) Aggregate base.
(1) Minimum of four inches of #2 compacted aggregate conforming to Indiana Department of Highways specifications unless in a high moisture area where requirement may be increased by County Highway Superintendent.
(2) The above material shall be compacted with vibratory-type rollers.
(3) If sub-grade is of an unstable soil, it shall be undercut and with stone, conforming to Indiana Department of Highways specifications, placed in the removal area.
(4) The crown (slope) shall conform to the final surface crown (one-fourth inch per foot to surface base width).
(J) Gravel surface.
(1) Minimum of four inches of #53 compacted aggregate (stone).
(2) Compaction at 91%.
(3) The crown (slope) shall be at least one-fourth inch per foot of surface base width.
(K) Chip and seal. Two lays of number 9 stone and one lay of number 11 stone along with one and one-half gallon per square yard of emulsion,
(L) Bituminous surface and base. This standard applies to any street paved with bituminous surface and is required if the applicant intends to dedicate the streets to the county for public use.
(1) The minimum shall be 110 pounds per square yard (approximately one inch) of Hot Asphaltic Concrete, #11 stone. Type “B” (all stone).
(2) The minimum shall be 330 pounds per square yard (approximately three inches) in Hot Asphaltic Concrete, #9 binder stone.
(3) The surface and base material shall be placed by machine and rolled with a five-ton roller (minimum).
(4) The crown (fall of surface) shall be one-fourth inch per foot.
(5) The aggregate base shall be primed with RS-2 at a rate of approximately .10 gallon per square yard.
(M) Reinforced concrete pavement.
(1) The minimum thickness shall be seven inches.
(2) Reinforcing shall conform to the requirements of the Indiana Department of Highways specifications.
(3) Reinforced concrete pavement may be used in place of hot asphaltic concrete material.
(4) Construction requirements shall conform to the Indiana Department of Highways specifications.
(5) The sub-base shall conform to division (I) above.
(BC Ord. passed 1-22-2003; BC Ord. passed 3-26-2003)