(A) If the development is traversed by or is contiguous to lakes, streams, washes, ditches or other bodies of water or drainage structures, the developer shall provide an easement or right-of-way for storm drainage substantially conforming to the line or path of any natural watercourse, channel, stream or creek, or provide an acceptable realignment of the watercourse.
(1) Easements may be required to provide for access to the watercourse at various locations along the corridor.
(2) No construction shall impede, constrict, or block the flow of water in any natural or improved watercourse.
(3) Drainage channel easements shall extend beyond the banks a minimum of 25 feet.
(B) Developers shall be required to comply with the rules and regulations of the flood damage prevention regulations (Chapter 151 in Town Code). Development site plans and preliminary and final plat submittals shall include information as specified by these regulations and shall depict information including but not limited to floodway and flood fringe locations and minimum finished floor elevations within the floodplain.
(C) Drainage structures such as bridges or culverts shall be designed to handle runoff from a 25-year return storm event for local streets and for a 50-year return storm event for collector and arterial streets without overtopping the street surface and shall be installed as deemed necessary by the Town Engineer for drainage, access and public safety. The structures and culverts are to be placed to grades and be of design and size approved or authorized by the Town Engineer.
(D) Adequate drainage of the development streets shall be provided by means of the structures or culverts, channels and by other approved methods, in accordance with APWA Standards or approved by Town Engineer.
(E) No street cross-gutter pans shall be allowed across major or collector streets, except where the cross-street gutter pan has been designed for the design speed of the street and its installation has been approved by the Town Engineer. The Town Engineer may prohibit the use of cross gutters on any street where deemed undesirable.
(F) Each development over two acres should be designed with on-site storm-water detention, maintained with landscaping and native plants, integrated into the overall design and layout of the development.
(Ord. 2017-02, passed 11-13-2017; Am. Ord. 2021-22, passed 12-13-2021)