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(B) Sidewalks. Paved sidewalks five feet wide of Portland cement, concrete or asphalt concrete may be <br />required on one or both sides of streets designated as collectors or arterials. <br />(C) Storm drainage. The construction of a storm drainage system shall conform to the following <br />requirements: <br />(1) Drainage ditches or channels shall have a minimum gradient of one percent; <br />(2) Open watercourses shall have adequate capacity and erosion control to ensure safe and healthful <br />disposal of stormwater; <br />(3) When topsoil has been removed from the surface of a lot on a slope where erosion will cause a <br />displacement of loose material, the subdivider shall be required to seed or provide other means to <br />prevent the wash from damaging adjacent property or accumulating on street surfaces; and <br />(4) Design of storm drainage facilities shall be compatible with adjacent areas, including the <br />extension of abutting existing storm sewers. Design of all drainage structures shall be based on <br />the 5 -year occurrence for design intensity using runoff coefficient and concentration times as <br />determined by the City Engineer. <br />(D) Water supply. Where public water supply is available, as determined by the Council, the subdivider <br />shall connect to the public water supply and construct a system of water mains with a connection for <br />each lot. The minimum size of water mains shall be six inches and the minimum size of private water <br />services shall be one inch. Water mains and services for commercial and industrial uses or for the <br />extension of major trunks shall be determined by the City Engineer. If private wells are to be permitted, <br />they shall be constructed in conformance with City Code and Minnesota Statutes and Rules. <br />(E) Sewers. All plats within the urban service area shall be connected to the municipal sewer system. <br />(F) Utilities. Every lot in a subdivision shall be capable of being served by utilities, and easements <br />acceptable to the utility companies shall be provided. Electric, gas and other utility distribution lines <br />shall be installed within public rights-of-way or within properly designated easements. All utilities in <br />new subdivisions shall be placed underground. To the fullest extent possible, underground utility lines <br />shall be installed within the right-of-way adjacent to but not beneath existing and proposed paved areas. <br />(G) Street name and traffic control signs. In single- and multiple -family developments, the developer shall <br />install all street name signs and traffic control signs as deemed necessary by the City Engineer. In <br />commercial and industrial developments, the developer shall install all street names signs and traffic <br />control signs as deemed necessary by the City Engineer. <br />(H) Sodding. The developer must sod the front yard, boulevard and side yards to the rear of the structure on <br />every lot -the balance of the lot shall be seeded. The required sodding and seeding shall be placed prior <br />to occupancy. An escrow deposit shall be submitted to the city in a dollar amount sufficient to <br />guarantee the required sodding. Hydro -seeding may be substituted for sod subject to: 1) Two rows of <br />sod shall be placed along the curb and any other adjoining pavements, erosion control as approved by <br />the Building Official shall be placed at the property lines and next to water features, and 2) the site <br />282 1 Page <br />