R-1999-31 - Laserfiche WebLink

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e . height specified above. The developer shall construct the storm drain system from this point to an approved outlet. 2. For non-curb and gutter streets, the developer may use open channel (channel or ditch) methods to dispose of storm water specified above. Such channels may be in dedicated drainage easements outside the standard street right-of-way upon City approval of the location and alignment of such easements. Alternatively, the developer may widen the street right-of-way to accommodate an open channel of greater capacity than the standard street/ditch section. 3. If the developer locates the channel in a widened street right-of-way, the City shall approve the right-of-way width and channel configuration. The depth of flow in the channel shall not exceed one (1) foot as measured from the ditch flowline to the point on the roadway established as the high water level in this section. 4. The developer shall design and construct all channels to terminate at an approved outlet. 5.6.4 Habitable Structures The developer shall provide adequate means for storm water run-offin excess of the "design storm" capacity (i.e., 3, IO-year storm) to flow around habitable structures. a.) The developer shall provide a grading/drainage plan which shows that all building sites can provide a finished floor elevation: (1) At least one foot (1') above the top of the curb using the highest point along the portion of such curb fronting the building site, or (2) At least eighteen inches (18") above the crown of road elevation, using the highest point along the portion of such road fronting the building site. (3) At least one foot above the ground elevation along all sides of the building site. b.) In addition to paragraph (a) above, the developer shall provide a grading/drainage plan which meets or exceeds the provisions of Chapter 94, Code of Ordinances, Flood Hazard Reduction. c.) The developer shall design and construct all streets to minimize any fill required to bring building pads into compliance with this Code. d.) Alternate methods of building protection may be accepted by the City upon submittal of detailed information, review and approval by the City Engineer. 5.6.5 Drainage System Criteria If an underground drainage system is required, and a 60-inch or smaller pipe will handle the design slow, pipe shall be used. If a 60-inch pipe is not adequate, the developer has the option to use concrete pipe or natural and/or a lined open drainage channel. If pipe is selected, the maximum allowable velocity shall be 8 fps in the pipe. Lining materials, if used, shall be approved by the City. Stonnwater Criteria 8 of 12