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6.2. Disturbed Area Runoff <br /> During all stages of mining, there is enough water storage capacity to contain the 5-year and <br /> 100-year 24-hour storm events and prevent erosion from surface water discharge. The <br /> expected rainfall from these events at the Delta Paving Site is provided in Table G-1 below. <br /> Table G-1 Area Storm Events (from NOAA2) <br /> Event Probability Event Rainfall <br /> " <br /> 100-YR 24-HR 2.07 <br /> The peak runoff was generated from these values for the three drainage basins during all <br /> stages of mining. Prior to mining, no water is discharged from the disturbed area in Drainage <br /> Basin 1 as the existing lake has the capacity to store the entire storm runoff. Drainage Basin 2 <br /> and 3 discharge water in their current conditions as no mining disturbance has taken place <br /> within them. During mining, the pits have enough storage to contain the entire discharge from <br /> the storm event. Following reclamation, there is enough storage capacity between the reclaimed <br /> lake water level and the top of the lake to store the entire runoff volume in each drainage basin. <br /> Therefore, mining and reclamation will not create any additional drainage from the site. <br /> The discharge volumes from these storm events are calculated in Appendix G-1 at the end of <br /> this exhibit. Table G-2 summarizes the runoff volumes and storage volumes for each drainage. <br /> 2 National Oceanic and Atmospheric Administration <br /> Delta Paving Gravel Pit <br /> Apri12022 G-4 Lewicki&Associates <br />