The grading of blocks and lots shall be in accordance with the standards of the Municipality. The plans may be based on any of the following grading systems:
       (a)       Where there is a ridge along rear lot lines, and the lots drain to the street.
       (b)       Where parts of all lots drain to a swale, or ditch along rear lot lines.
       (c)       Where there is a cross slope, the drainage onto adjoining properties shall be skillfully controlled.
       (d)       Where the land is relatively flat and adequate drainage must be formed.
       (e)       Or a variation of the above conditions.
      (Ord. 2635.  Passed 1-13-11.)