2025-07-07_PERMIT FILE - M2025032

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4 logs should be of sufficient length to traverse the entire drainage ditch perimeter and be secured using wooden stakes or rebar. For 9 or 10-inch diameter logs, the logs should be placed no less than 35 feet on center during active soil removal operations. Figure 4 also indicates the external boundaries of the ultimate extents of the total proposed disturbed area. If required, a minimum 10-inch-diamter corrugated metal (or other alternative) culvert may be installed at the crossing location of the site entrance roadway so that any ditch flows will not be impeded. The culvert invert should match the existing bottom ditch grade and have a minimum of 1-foot soil cover. The entrance/exit roadway from the property on to County Road 28 will also be equipped with a ground protection mat to help prevent mud and sediment that may collect on haulage truck tires leaving the site during excavation, loading and haulage operations from being deposited on clean asphalt pavement. Sediment Control Basin Figure 5 shows the proposed location of a small sediment control basin that serves as the terminal sediment control feature for the site. The basin is located adjacent to an existing depression that collects flows from the ditch from both northeast and southwest directions prior to those flows passing beneath County Road 28 through two concrete box culverts(see Figure 4)and discharging on to the adjacent farm property. The proposed basin excavation plan includes over-excavating the existing depression to the approximate boundaries shown on Figure 5 to a depth of 3 feet below existing grade. Under extreme rainfall events,this basin will serve to settle any collected sediment and eliminate the possibility of offsite excursions. F. Final Site Stabilization Final site stabilization and erosion control will include, but may not be limited to the following general features: • grading and seedbed preparation • fertilization • seeding • mitigation of erosion features developed during active operations; and • post-closure inspections and maintenance Final site stabilization,to be completed at the close of active soil removal operations,must include establishment of a uniform vegetative cover with an individual plant density equal to 70 percent of pre-disturbance levels as required by regulation. This criterion will be validated based on pre- construction site photographs and those of post-closure photographic records and written visual inspections carried out by the owner or its designated representative. Per the general excavation plan in place at the creation of this plan, soil will be removed in sequence from the west side toward the east in pattern that maintains the general flow of runoff form the property toward the west and the drainage along County Road 28. Once all borrow operations have been completed, the final grading shall be established in such manner that the Sedgwick County/2023 Borrow Area Construction/Sedgwick County Construction Borrow Area Stormwater AEC