(A) All lots shall be graded to carry surface water to an approved watercourse or storm sewer.
(B) Preliminary lot grading shall be completed at the time of street and utility installation to prevent water ponding on undeveloped lots.
(C) Finished ground elevations on the outside of the foundations of all structures shall be a minimum of 2% from the top of the curb to the building setback line. If the pavement is uncurbed, it shall be 3% from the near edge of the pavement to the building setback line.
(D) Retaining walls shall be constructed on side or rear lot lines where the grade varies across lot lines by one foot or more within three feet of side lot line.
(E) No foundation for any occupied structure shall be placed at an elevation lower than a 100-year flood reoccurrence elevation.
(F) A grading and drainage plan shall be submitted, showing all existing and proposed storm sewers, manholes, catch basins, watercourses, culverts, and other underground structures within the tract and immediately adjacent thereto, with pipe sizes and grades or waterway openings indicated. Topographic contours to one foot shall be indicated. The plan shall show the method to be used for the adequate disposal of all storm sewer water, including drainage outlets, and shall include a typical lot cross section drawn perpendicular to the street indicating lot grading and such other data as may be required by the city engineer. The plan shall be drawn at a scale represented by not more than 50 feet to the inch.
(1980 Code, § 151.48) (Ord. 3704, passed 6-5-1978)