(a) The minimum allowable width of the street right-of-way between property lines shall be 60 feet. Pavement surfaces shall be a minimum of 22 feet centered in the right-of-way. On each side of the pavement there shall be a shoulder of a minimum of six feet in width. The two feet of the shoulder adjacent to the pavement shall be aggregate having a bituminous surface treatment. Each shoulder shall slope to a drainage ditch at the rate of three-eighths of an inch per foot. The berm beyond the shoulder shall have a slope not exceeding a maximum ratio of three to one, sloping to a drainage ditch in the street right-of-way, the bottom of which shall be at least eight inches below the subgrade or bottom of the street pavement at the pavement edge. The pavement of the street shall be crowned from the center to each edge so that the pavement on each side of its center shall slope five-sixteenths of an inch per foot plus or minus a one-sixteenth inch per foot for tolerance. The shoulders and berms and the overall right-of-way of the street shall be graded and drained to prevent the impounding of water and to permit runoff without damage to abutting property in its existing state or as it may be lawfully improved. Drainage of nearby land shall be required if necessary to prevent impounding of water in the street right-of-way and to permit adequate street drainage. Good drainage of the street subsurface at all seasons of the year shall be deemed of highest importance in the construction of a street, and whenever, by reason of length and degree of slope of the street at any part thereof, the drainage ditch in the street right-of-way will be subject to severe erosion, a storm sewer and catch basins of proper size and design shall be installed.
(b) Wherever it is necessary to drain water from one side of the street to the other under the pavement, reinforced concrete or other approved culvert pipe of adequate capacity and size shall be installed with a minimum diameter of 12 inches, a minimum slope to the point of outlet of one inch in each ten feet of length and at a depth of a minimum of six inches from the subgrade or bottom of the street pavement at its edge to the top of the pipe. When necessary, bridge structures shall be constructed of approved design.
(c) The inlet end of any culvert pipe under the pavement of the street shall be imbedded in a reinforced concrete headwall with a minimum thickness of 12 inches, a minimum base below the culvert pipe of three feet and of sufficient width to secure permanently the discharge water. Adequate provision shall be made for prevention of erosion at the outlet end of such culvert. A thick stand of a mixture of 50 percent Kentucky blue grass, 40 percent fescue and ten percent white clover shall be established on the berms, shoulders and overall right-of-way of the street.
(Ord. 1994-28. Passed 12-20-94; Ord. 2000-6. Passed 4-18-00. Ord. 2001-6. Passed 4-3-01.)