(A) The drainage system and facilities required for any surface run-off affecting the subdivision are subject to approval by the City Council. Subdivisions containing lots less than 20 acres in size must also be reviewed and approved under M.C.A. Title 76, Chapter 4 by the DEQ.
(B) A grading and drainage plan as required by § 9.6.25(F) is subject to approval by the City Engineer or Public Works Department.
(C) Curbs and gutters or swales will be required based on the character of the area, density of development, and nature of adjoining properties. Curbs and gutters of adjoining properties must be extended in conformance with current specifications of local and state authorities. The City requires sidewalks, curb and gutter on all new developments.
(D) Culverts and bridges of adequate size must be provided and installed by the subdivider where drainage channels intersect any street or road right-of-way or easement. All culverts and bridges must be constructed and installed according to applicable local and state standards. Culverts and other drainage facilities must be large enough to accommodate potential run-off from upstream drainage areas.
(E) The subdivider must provide suitable drainage facilities for any surface run-off affecting the subdivision. These facilities must be located in street rights-of-way or in perpetual easements of appropriate widths.
(F) Drainage systems must not discharge into any sanitary sewer facility.
(G) Drainage systems must be designed and certified by a professional engineer.
(H) (1) The City Council may require the subdivider to grant easements to prevent encroachment or disruption of drainage ways or facilities.
(2) Drainage easements must be shown on the plat and a signed statement granting the easements must appear on the plat. (Res. 607, passed 7-1-2019)