All necessary facilities, including underground pipe, inlets and catch basins, as determined by the Municipal Engineer, shall be installed to provide for the adequate disposal of subsurface and surface water and maintenance of natural drainage courses. All storm drainage facilities within the subdivision shall connect to an adequate drainage course.
(a) Storm Sewers and Storm Water Drainage. A drainage system adequate to serve the needs of the proposed new streets and the entire subdivision will be required in new subdivisions. Where an adequate public storm sewer main is available at the plat boundary, the subdivider shall construct a storm sewer system and connect with such storm sewer main of adequate size. If such storm sewer systems are not accessible, adequate storm sewers shall be provided with easements of adequate width, as determined by the Municipal Engineer and approved by the Planning Commission. Where storm sewers cross land not in the dedicated street right of way, an appropriate easement shall be given to the Municipality for such drainage purposes.
Consideration should be given to lowering the depth of the storm sewer to allow footer and interceptor drainage in areas of high water table. A drainage system, including turf gutters, culverts, pipes, manholes, catch basins and drain inlets, shall be provided as required by the Commission and the Municipal Engineer. Storm drainage, including drain tile around basements, shall not be permitted to discharge into any sanitary sewage facility. Where a public storm sewer is reasonably accessible and of adequate capacity, as determined by the Commission, the developer shall make the proper connection to such storm sewer system and shall do such grading and provide such drainage structures as may be required.
(b) Culverts and Bridges. When natural drainage channels intersect any street right of way, it shall be the responsibility of the subdivider to have satisfactory bridges and culverts designed and constructed. Where culverts are required, the following minimum requirements shall be observed:
(1) All culverts shall extend across the entire right-of-way width of the proposed road.
(2) The cover over the culvert and its capacity shall be determined by the Municipal Engineer. The minimum diameter of a culvert pipe shall be twelve inches. Head walls, depending on existing drainage conditions, may be required.
(c) Standards and Specifications for Drainage Facilities. The construction of storm water drainage improvements shall be subject to the approval of the Planning Commission, with advice from the Municipal Engineer.