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4. The developer shall design and construct all channels to terminate at an approved outlet. <br />5.6.4 Habitable Structures <br />The developer shall provide adequate means for storm water run-off in excess of the "design storm" <br />capacity (i.e., 3, 10-year storm) to flow around habitable structures. <br />a.) The developer shall provide a grading/drainage plan which shows that all building sites can <br />provide a finished floor elevation: <br />(1) At least one foot(1') above the top of the curb using the highest point along the <br />portion of such curb fronting the building site, or <br />(2) At least eighteen inches (18") above the crown of the road elevation, using the highest <br />point along the portion of such road fronting the building site. <br />(3) At least on foot above the ground elevation along all sides of the building site. <br />b.) In addition to paragraph (a) above, the developer shall provide a grading/drainage plan which <br />meets or exceeds the provisions of Chapter 94, Code of Ordinances, Flood Hazard Reduction. <br />c.) The developer shall design and construct all streets to minimize any fill required to bring <br />building pads into compliance with this code. <br />d.) Alternate methods of building protection may be accepted by the City upon submittal of <br />detailed information, review and approval by the City Engineer. <br />5.6.5 Drainage System Criteria <br />If an underground drainage system is required, and a 60-inch or smaller pipe will handle the <br />design slow, pipe shall be used. If a 60-inch pipe is not adequate, the developer has the option to <br />use concrete pipe or natural and/or a lined drainage channel. If pipe is selected, the maximum <br />allowable velocity shall be 8fps in the pipe. Lining materials, if used, shall be approved by the <br />City. <br />5.6.6 Public storm sewers are defined as sewers and appurtenances that provide drainage for a public <br />right-of-way, or more than one private tract, and are located in public right-of-way or easement, <br />private storm sewers provide internal drainage for a reserve or other tract. Private storm or sewer <br />connections to public storm sewers shall occur at a manhole or at the back of an inlet as approved <br />by the City Engineer. All private storm sewers within the public right-of-way shall be constructed <br />in conformance with the Standards. <br />5.6.7 All construction shall conform with the City of La Porte Construction Details. <br />5.6.8 All storm sewers shall meet or exceed the requirements of the "Drainage Criteria Manual for <br />Harris County, Texas" and the requirements of the City of La Porte. <br />5.7 LOCATION OF STORM SEWER <br />5.7.1 Public storm sewers shall be located within a public street right-of-way or storm sewer easement, <br />dedicated to the public and adjoining a public street right-of-way. Storm sewers through side lot <br />drainage easements are highly discouraged. Limited use may be approved at the discretion of the <br />City Engineer. If approved, a minimum twenty -foot (20') wide easement is required (10' on each <br />lot). <br />5.7.2 Recommended alignment within a public street right-of-way. <br />A. Boulevard pavement section with median — along centerline of the right-of-way. <br />Stormwater Criteria Page 7 of 10 <br />