(A) Stormwater channel location. Generally acceptable locations of stormwater channels in the design of a subdivision may include but are not limited to the following:
(1) Adjacent to roadways.
(2) In a depressed median of a divided roadway, provided the median is wide enough to permit slopes of one foot drop in six feet horizontal or flatter.
(3) Centered on lot lines or entirely within the rear yards of a single row of lots or parcels.
(B) In each of the foregoing cases drainage easement with sufficient width to facilitate maintenance and design flow shall be provided and shown on the plat.
(C) Storm sewer outfall. The storm sewer outfall shall be designed to provide adequate protection against downstream erosion and scouring.
(D) Lot lines. Whenever the plans call for the passage and/or storage of stormwater runoff along lot lines, the grading of all such lots shall be prescribed and established for the passage and/or storage of waters, and no structure or vegetation which would obstruct the flow of stormwater shall be allowed nor shall any change be made to the prescribed grades and contours of the specified stormwater channels.
(E) Manholes. All utility sewer manholes constructed in an area designed for the storage or passage of stormwater, shall be provided with either a watertight manhole cover or be constructed with a rim elevation of a minimum of one foot above the high water elevation of the design storm.
(F) Easements. Permanent easements for the detention and conveyance of stormwater, including easements of access to structures and facilities, shall be dedicated to the city.
(G) Obstruction of drainage. The keeping or disposal of grass clippings, trash, debris, obstruction or unwanted materials into the storm sewers or within or along stormwater channels or in adjacent floodplain areas which may wash into sewers and channels is prohibited.
(H) Maintenance. Required maintenance for detention basins or other structures shall be permanently provided by the developer with responsibility becoming that of the private landowner after complete development, subject to inspection of the Stormwater Manager. Every entity shall be specified. Refer to § 160.31 for maintenance requirements.
(I) Encroachment permit (city right-of-way).
(1) All new construction projects (residential, commercial or industrial) which require a permanent or temporary entrance onto an existing city street or a newly developed street which is to be dedicated to the city at a later time and which can impact proper street drainage shall apply for an encroachment permit at the Office of Public Works. The encroachment permit form will be supplied by the city. The encroachment permit should be complete in sufficient detail to show the location of said entrance with respect to property lines. The encroachment permit shall detail the pipe size, material and slope/grade.
(2) This encroachment permit shall be obtained prior to issuance of a building permit by the Planning and Zoning Office.
(3) The fee required for the encroachment permit shall be as listed in § 97.17 Application Fee; Bond. This encroachment permit fee is fully refundable provided the entrance is constructed as detailed and approved on said encroachment permit.
(Ord. 2809, passed 12-10-2012) Penalty, see § 160.99