2006-123 Ordinance - Laserfiche WebLink

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Ordinance No. 2006-123 elevation of the storage facility outlet and the restrictor pipe shall be aligned in such a manner to eliminate the creation of a sump within the storage facility. Pipe installation methods and bedding materials shall conform to those recommended in the LJNIFORM STANDARDS FOR SEWERAGE IMPROVEMENTS. (b) Infiltration basins, also known as stone beds, shall only be approved subject to the following standards: (1) A report shall be submitted from a certified testing labaratory containing sufficient records and data to establish the character of the soil. Such records shall describe the soil conditions found to a depth of at least five feet (5') below the deepest point proposed for the installation of the stone bed or dissipation wells. The report shall include information regarding the level of the water table and soil permeability. (2) The stone bed shall be located a minimum of twenty feet (20') from any building or ten feet (10') from any property line or sanitary sewer easement. (3) An approved filter fabric shall cover the top and sides of the stone bed. (4) The required volume of the stone bed shall be calculated using approved terms for coefficient of runoff, drainage area, storm intensity and time of concentration. The porosity ratio shall be 0.33 to figure net volume from the gross volume. (5) An observation well shall be required for inspection purposes. The location and diameter shall be approved by the Engineering Department. The observation well shall be as deep as the deepest part of the stone bed. Perforated pipe may be approved for use in an observation well. (6) The infiltration basin shall have a sump pump to discharge excess water to an approved storm sewer or ditch. (c) All storm water flow from the proposed development, including flows from upstream areas passing through, and further including increased flow attributable to changes in time of concentration or changes in the former runoff factor (imperviousness), shall be conveyed to the proper storage facility end outlet for the entire tributary area via a natural channel or pipe/culvert either or both of which shall be improved so as to be of adequate capacity. For non-residential properties without an existin2 natural channel or bine/culvert. storm water from detention or retention Engineer and nrovided a tlc (d) One foot of freeboard shall be provided in wet ponds above the 100-year storm water level SECTION 2: That all ordinances, or parts of ordinances, inconsistent or in conflict with this Ordinance, are, to the extent of such inconsistency or conflict, repealed. SECTION 3: That this Ordinance is hereby declared to be an emergency measure immediately necessary for the preservation of the public peace, health, safety and welfare of this City and for the further reason that this Ordinance is required to be immediately effective in order to resolve serious storm drainage issues involving several pending development projects in the City; and further provided it receives the affirmative vote of two-thirds of all members of Council, it shall take effect and be in force immediately upon its passage and approval by the Mayor.