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The subdivider shall construct all necessary facilities, including underground pipe, inlets, catch basins or open drainage ditches, as determined by the City Engineer, to provide for the adequate disposal of subsurface and surface water and maintenance of natural drainage courses. The velocity of flow in an open ditch shall not exceed four feet per second in soil ditches or six feet per second in turf gutters. Paved gutters will be required if velocities of flow are greater than those specified or if it is otherwise likely that destructive erosion will result. Drainage ditches shall not be permitted to discharge into any sanitary sewer facility.
(Prior Code, § 9.4)
Where an adequate public storm sewer system is available at the plat boundary, the city shall construct a storm sewer system and connect with the storm sewer line. If a storm sewer system is not accessible, natural drainage channels with easement of adequate width shall be provided, as determined by the City Engineer and approved by the City Council. Storm drainage, including drain tile around basements, shall not be permitted to discharge into any sanitary sewer facility, but shall connect to an adequate drainage outlet.
(Prior Code, § 9.5)
(A) Where natural drainage channels intersect any street right-of-way, it shall be the responsibility of the subdivider to have satisfactory bridges and/or culverts constructed.
(B) Where culverts are required, minimum requirements shall be observed as follows.
(1) All culverts shall extend across the entire right-of-way width of the proposed street. The cover over the culvert and its capacity shall be determined by the City Engineer. The minimum diameter of a culvert pipe shall be 18 inches. Depending on existing drainage conditions, head walls may be required.
(2) Driveway culverts shall have a minimum length of 20 feet and a minimum diameter of 18 inches. The driveway culverts shall be laid so as to maintain the flow lines of the ditch or gutter. Head walls may be required.
(Prior Code, § 9.6)
The subdivider shall be required to provide for the control of erosion of areas of the subdivision which are disturbed by grading operations by constructing temporary terraces on slopes, temporary silting basins, sod swales and spillways, and whatever may be necessary to prevent erosion and damage to adjacent properties from surface drainage as approved by the city and the City Engineer.
(Prior Code, § 9.7)
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