2016-096 Ordinance - Laserfiche WebLink

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EXHIBIT A: EXISTING CHAPTER 927 (E) The depth of the dewatering zone of the sediment settling pond must be less than or equal to five (5) feet. (F) Sediment must be removed from the sediment settling ponds when the design capacity has been reduced by 40 percent. (G) Public safety, especially as it relates to children, must be considered in the design. Alternative sediment controls must be used where site limitations would preclude a safe design. (14) Temporary sediment settling ponds will not be constructed in any stream channel. (4) Sediment Barriers. Sheet flow runoff from denuded areas shall be intercepted by Silt Fence or Diversions to protect adjacent properties and water resources from sediment. Where intended to provide sediment control, Silt Fence shall be placed on a level contour. The relationship between the maximum drainage areas to Silt Fence for a particular slope is shown on the table below (placing silt fence in a parallel series does not extend the size of the drainage area). Table 1: Silt Fence Applicability Maximum drainage area (in acres) to 100 linear feet of Silt Fence MR 0.25 0.125 Range of slope for a particular drainage area (in percent) ❑ 2% > 2% but ❑ 20% > 20% but ❑ 50% (5) Storm sewer inlet protection. (A) All storm sewer inlets that accept water runoff from the development area shall be protected so that sediment -laden water will not enter the storm sewer, unless the storm drain system drains to a Sediment Settling Pond and is exempted in writing by the Community Engineer. In areas where construction will be ongoing, such as subdivisions, the storm sewer protection shall be maintained until all up slope areas reach final stabilization, as determined by the Community Engineer. (B) All inlets receiving runoff from drainage areas of one or more acres will require a sediment settling pond. (C) At the end of this period the site owner shall hydraulically clean the storm sewers to the satisfaction of the Community Engineer. All sediments shall be removed from the system and shall not be flushed downstream. (6) Working in or crossing streams. (A) Streams including bed and banks shall be restabilized immediately after in -channel work is completed, interrupted, or stopped. To the extent practicable, construction vehicles shall be kept out of streams. Where in -channel work is necessary, precautions shall be taken to stabilize the work area during construction to minimize (B) erosion. If a live (wet) stream must be crossed by construction vehicles regularly during construction, a temporary stream crossing shall be provided.