1119.03 GRADING.

   The developer shall prepare a grading plan for each subdivision in order to establish street grades, floor elevation of buildings and a system of drainage for private lots, all in proper relation to each other and to existing topography, as follows:

   (a)    Grading of Block. The grading plan for the block shall be in accordance with criteria as set forth in Section 1117.02. The purposes are:

      (1)    To divert water away from buildings;

      (2)    To prevent standing water and soil saturation detrimental to buildings and the use of the lot;

      (3)    To provide for disposal of water from the lot except that which should be retained for irrigation;

      (4)    To preserve desirable site features; and

      (5)    To provide grades for safe and convenient access to and around buildings and the lot for their use and maintenance.

         The finished grading shall be designed in accordance with the chapter on Lot Improvements, details 88 through 91, of the FHA Minimum Property Standards for One and Two Living Units, and Section M 309 Grading Design of the Municipal Property Standards for Multifamily Housing.

         The grading of the roadway shall be in accordance with criteria set forth in Section 1117.02, and extend the full width of the right of way except in rolling topography. Tree lawns should be graded at a gradient of not less than two percent or more than four percent upward from the curb to the sidewalk or property line.

   (b)    Lot Grading. The floor elevation of each building shall be established in proper relation to the surrounding grades, to the driveway and the street. There should be a minimum grade of two percent around each building so that water drains to lower areas or drainage swales which shall have a minimum grade of 0.5 percent. The lot drainage system shall be designed so that surface water will drain onto the driveway, a drainage structure on the lot, a street gutter and storm sewer, or a natural drainage way.

         The minimum grades of driveways shall be 0.5 percent; the maximum shall be twelve percent. Grading should be adjusted so there will be no abrupt grades in the front yards and along side lot lines. The grades of earth terraces shall not exceed a two and one-half to one slope. If a masonry retaining wall exceeds three feet in height, a hedge, fence or railing shall be provided on it.

   (c)    Topsoil and Trees. The topsoil shall be stripped from the roadway and construction areas, piled separately and not removed from the site or used as spoil. The Planning and Zoning Commission may require that as many trees as can be reasonably utilized in the final development plan be retained, and that grading be adjusted to the existing grade around the trees.

      (Ord. 69-38. Passed 4-20-70.)