The developer shall prepare a grading plan for each subdivision in order to establish street grades, floor elevations of the building and a system of drainage for the street right of way and the private lots, all in proper relation to each other and to existing topography.
(a) Grading of Block (Criteria). The finished grading for the block shall be designed in accordance with minimum standards for lot grading design of the City and available through the Building Division.
The grading of the roadway shall be in accordance with the criteria set forth in Section 1109.04 and the Construction Standards of the City, and extend the full width of the right of way. Tree lawns should be graded at a gradient of not less than two percent (2%) or more than four percent (4%) upward from the curb to the sidewalk or property line.
(b) Lot Grading (Criteria). The floor elevation of each building shall be established in proper relation to the surrounding block grades, to the driveway and the street. There should be a minimum grade of two percent (2%) around each building so that water drains to lower areas. Drainage swales shall have a minimum grade of 0.5 (one-half) percent. The lot drainage system shall be designed so that surface water, except that which should be retained for natural irrigation, shall 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 one-half percent (0.5%). 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 (2-1/2) to one (1), slope.
(c) Topsoil and Trees (Criteria). The topsoil shall be stripped from the roadway and construction areas, piled separately and not removed from the site or used as spoil. The Commission may require that as many trees as can be reasonable utilized in the final development plan be retained, and the grading be adjusted to the existing grade around the trees.
(Ord. 58-73. Passed 7-23-73.)