8-13D-10-4: SITE GRADING AND DRAINAGE:

   1.   All disturbed areas shall be revegetated or restored, with proper erosion and dust control methods. Stockpiling, erosion, and loss of topsoil shall be minimized.

   2.   Revegetation shall be done as soon as possible after finish grading has been completed, usually in early Spring or in the early Fall.

   3.   Topsoil that is removed shall be centrally located with respect to construction phasing. The stockpile may also be protected by seeding, watering, mulching, or covering.

   4.   All grading shall follow Ada County requirements. Slopes of three to one (3:1) or less are preferred with overall finish grades blending with natural landforms to the greatest extent possible. Slopes greater than three to one (3:1) shall be stabilized through such means as terracing or planting. Custom retaining walls and landscaping must be used to screen cut and fill areas. Minimize grading on slopes greater than twenty five percent (25%). Soften slope banks through use of contoured grading at toe and top of slope. Provide rounded transitions and variable slope gradients. Avoid rounded long slopes with sharp transitions.

   5.   Individual site sensitive grading, as well as appropriate hillside adaptive construction, shall be provided on hillside lots, and shall be reviewed and approved by the DRC.

   6.   Detention basins, silt drains, and fences and temporary revegetation should be used in conjunction with other earthwork operations for sediment and drainage control during construction.

   7.   Avoid construction in areas with unstable soils that may require costly construction and greater impacts to natural conditions. Provide erosion control measures on cut and fill slopes, and on highly permeable soils. Locate individual septic systems carefully to avoid ground water impacts.

   8.   Use naturally occurring drainage patterns to avoid increased runoff and potential erosion problems. Use grass swale and detention ponds for gradual release and ground water recharge.

   9.     Encourage split-level building to minimize grading and compleme nt natural slope.

   10.    A graded slope that exceeds thirty three percent (33%) or eight feet (8') in height shall have special slope treatment and/or retaining walls that stabilize the slope and minimize scarring. Minimize tall visible retaining wall structures by stepping with grade. Use natural materials (stone, wood, etc.) and natural colors for retaining walls wherever practical.

(Ord. 1002, 10-28-2025)