Street construction including new streets or reconstruction of existing streets shall be governed by the succeeding specifications and regulations established by the City.
(a) Grading. All streets shall be graded to the full width of the right-of-way and the adjacent side slopes graded to blend with the natural lay of the land, or in accordance with the cross section presented to the satisfaction of the City Engineer. Where fill material is necessary to establish uniform grades, compacting shall be required in accordance with the regulations established by the City. A slope of two horizontal to one vertical, beyond the right-of-way line in cut or fill, shall ordinarily be required.
(b) Street Cross Sections. Street cross sections for local streets and collector streets shall be in accordance with the regulations established by the City. Where alternatives are available, the Planning Commission may designate the cross sections to be used on the advice of the City Engineer. All details of the cross sections; crowns, curb, pavement, subgrade and roadside ditches, shall conform to the designated cross section. Arterial road cross sections shall be as designated by the City Engineer and approved by the Commission. State approval shall be required where necessary.
(c) Cross Drains. Cross drains shall be a minimum of fifteen-inch reinforced concrete or bituminous covered corrugated metal pipe and shall be placed wherever necessary to transfer water across the road to a natural water course and at road intersections where needed.
(d) Curbing.
(1) Curbing shall be of concrete or of a bituminous mix, either straight, battered or rolled as determined by the Commission.
(2) The requirements of curbs or curbs and gutters shall vary in accordance with the character of the area and density of development involved.
A. Curbs shall ordinarily be required where:
1. Streets are designed to serve areas in which the net residential density of the area surrounding the proposed subdivision equals or exceeds three families per acre;
2. Lot frontage is less than seventy-five feet;
3. Commercial development or other similar intensive urban uses exist; and
4. If curbs exist on abutting property, the Commission shall ordinarily require their extension throughout the proposed subdivision.
B. The Commission may require curbs and gutters to be installed on arterial, collector or local streets if such construction is deemed necessary for public safety, control of water runoff or clearly defined driving and parking areas.
C. When curbed streets are constructed, the space behind the curb shall be filled and graded to drain to the street at a slope of three-eighths of one inch per foot.
(e) Base Course. The base course shall be eight-inch thick (rolled measurement) native stone, limestone or crushed slag properly graded and meeting the requirements of the current specifications of the West Virginia Department of Highways and subject to their complete tests. Lesser base courses, to a minimum of six inches, may be authorized by the Commission on advice of the City Engineer on lesser streets where the character of the drainage of the subgrade, the size of the subdivision and nature of the traffic warrants.
(f) Pavements.
(1) A two and one-half inch bituminous plant mixed surface shall be placed on the prepared base to meet the requirements of the current specifications of the West Virginia Department of Highways. Where a six-inch base is authorized, a bituminous double surface treatment in accordance with the West Virginia Department of Highways requirements may be used.
It shall be the general practice that developers shall not complete the permanent paving process until such time as all underground utility and other heavy subdivision construction has been completed to minimize potential street damage in new developments. Maintenance of the partially completed (paved) streets shall be the responsibility of the developer until such time as the permanent paving process is completed and maintenance responsibility transferred to the City through the street dedication process.
(2) Where concrete pavement is used, the standard requirements of the West Virginia Department of Highways shall govern and all work shall be performed in the manner prescribed in the standard specifications for road construction of such Department, and shall be approved by the City Engineer. Local streets shall be at least six inches in thickness and conform to other specifications of the Department.
(3) Either type of pavement listed above shall be approved by the Commission and City Engineer before application. The installation shall be under the direct supervision of the City Engineer.
(4-24-72)