(a) Receipt of the signed copy of the approved preliminary plan is authorization for the subdivider to proceed with the preparation of plans and specifications for the following minimum improvements and with the preparation of the final plat. Prior to the construction of any improvements required (or to the submission of a bond in lieu thereof), the subdivider shall furnish the City Planning Commission all plans, information, and data necessary to determine the character of said improvements. These plans shall be examined by the City Engineer or a professional engineer under contract to review all subdivisions by the Planning Commission, and will be approved if in accordance with the requirements of this section. Following this approval, construction can be started (or the amount of a bond determined).

(b) No final or official plat of any subdivision, except for subdivisions prepared by the City of Kenai, shall be approved unless:

(c) All street and public ways shall be graded to their full width and to the appropriate grade, and shall be surfaced to a minimum width of thirty (30) feet in accordance with applicable standard specifications of the City, and all streets in any subdivision that the City Planning Commission shall designate as major streets shall be surfaced to a minimum width of forty (40) feet. The cross-section of construction shall contain non-frost susceptible material to the depth of forty-two (42) inches from appropriate grade, and in the absence of any other specified depth by applicable standard specifications of the City. Such construction shall be subject to inspection and approval by the City Engineer or his equivalent under contract by the City, and shall comply with all applicable City standards for construction.

(d) Concrete sidewalks not less than four (4) feet in width shall be constructed along at least one side of all major streets and arterial streets. The Planning Commission may also require the construction of sidewalks along at least one side of minor streets. (In subdivision of ten (10) lots or less, the subdivider will include a covenant on the recorded plat that when an improvement district is formed, the real property involved will be a part of the improvement district without further action by the then owner of the property in question.)

(e) In subdivisions of ten (10) or more lots, an approved public water supply shall be provided for each lot within the subdivision area. Water mains shall be buried at least eight (8) feet deep with the depth to be determined by measuring from the grade line of the planned preliminary future street grades or, if there are no planned future street grades, from the natural grade of the adjacent right-of-way to the top of the main being installed. Fire hydrants shall also be installed in all subdivisions and in accordance with the specifications of the Nation Board of Fire Underwriters. (In subdivisions of ten (10) lots or less, the subdivider will include a covenant on the recorded plat that when an improvement district is formed, the real property involved will be a part of the improvement district without further action by the then owner of the property in question.)

(f) The subdivider shall install sanitary sewer lines to serve each lot. All such sewer lines shall be constructed in accordance with regulations and requirements of, and under the supervision of the City Engineer’s office or his equivalent under contract by the City if such sanitary sewers are available for connection by the said subdivider and are located within one thousand five hundred (1,500) feet of the subdivider’s nearest lot line.

(g) All necessary facilities, either underground pipe or drainage ditches, shall be installed to provide adequate disposal of surface water and to maintain any natural watercourses.