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0 1 1 1 C] 1 40 9. Existing contours. --- Contour interval to be designated by the County Engineer. Elevations are to be based on United States coast and geodetic survey sea level datum. All existing public drainage canals and ditches. If it is chosen not to sketch contours the elevations & requirements of Section X, paragraph 4.(k) shall comply. 10. Street and general area drainage plan showing the size and direction of flow of all surface waters. 11. Dedicated Park areas must be so indicated on plat (See Sec. X paragraph 12.) 12. When the final plat has been so prepared, the same shall be submitted to the County Engineer, whether or not all contemplated improvements as set forth in the preliminary plat as approved have been completed or if not completed, the estimated cost of the uncom- pleted items and whether or not the bond for completion has been posted with the Clerk of the Circuit Court and whether or not he recommends approval of the final plat. If disapproved, the final plat shall be returned to the subdivider for compliance and if approved, a certificate of such approval shall be endorsed upon the final plat by the County Engineer and the same may then be recorded in the public records. After final approval and recording the subdivider shall immediately furnish the County with three (3) linen prints of the final plat as may be required by the County Engineer. SECTION VII The proposed subdivision layout shall conform to the County's master plan and off- icial map. The arrangement, character, extent, width, grade and location of all streets hi! shall conform to the official map and master plan and shall be considered in relation to n existing and planned streets to topographical conditions to public convenience and safety and in their appropriate relation the the proposed uses of the land to be served by such streets. Where not shown on the official map or master plan, the arrangement and other design standards or streets shall conform to the provisions found herein, to -wit: 1. The arrangement of streets in new subdivisions shall make provision for the conti ation of the existing streets in adjoining areas. 2. Where adjoining areas are not subdivided, the arrangement of streets in new subdivisions shall make provision for the proper projection of streets. 3. When a new subdivision adjoins unsubdivided land, then the new streets shall be carried to the boundaries of the land proposed to be subdivided. 4. Street jogs with center line offsets shall be avoided. 5. Dead-end streets shall be avoided but where necessary they shall be provided at the closed end with a turn -around for an outside roadway diameter of at least 80' and a street property line diameter of at least 100'. 6. Where a subdivision abuts or contains an existing arterial street, the County require marginal access streets or other such treatment as may be necessary for adequate pro- tection of residential properties and to afford separation of through and local traffic. 7. Street widths shall be not less than as follows: Street Type Width Arterial . . . . . . . . . . . . . . 200' Primary . . . . . . . . . . . . . .. 120'