If the preliminary plan in § 99.037 is approved, the owner or developer shall be required to make the following improvements at no cost to the town prior to the town accepting the street or alley as a public street:
(A) The right-of-way shall be cleared and graded to its final grade for the full width of the right-of-way. Grades shall not, as far as practical, exceed 5%.
(B) Streets shall be crowned and adequate street drainage ditches provided in accordance with the street improvement construction specifications of the town.
(C) Topsoil, gravel, or other suitable base coarse material shall be put in place for a minimum width of 30 feet, which shall be the minimum width for an improved street. Additional improved street widths may be required for major thoroughfares by the Town Council; however, the improved width of alleys need not exceed 20 feet.
('71 Code, § 13-69)