Table : Summary of Discharges Peak Discharge (cfs) 1% Annual 1% Annual 0.2% Flooding Drainage Area 10% Annual 4% Annual 2% Annual Chance Chance Annual Source Location (Square Miles) Chance Chance Chance Existing Future Chance Downstream side Culvert Creek 1.0 130 * 170 190 * 240 of Smith Lane Inundation Confluence with 1,058 77,200 * 107,000 122,000 132,000 143,000 River Big Ocean Inundation At Coastland 980 73,100 86,800 101,000 116,000 119,000 136,000 River Inundation At Floodville 930 70,500 82,360 97,100 111,000 115,000 130,000 River Inundation At Metropolis 902 69,000 81,100 95,000 109,000 113,000 128,000 River Confluence with North Fork Inundation Inundation River 879 67,700 * 93,200 107,000 114,00 125,000 River and South Fork Inundation River North Fork Above State Inundation 137 18,100 * 24,000 27,000 * 31,600 Highway 42 River South Fork Confluence with Inundation 598 51,100 * 69,700 79,600 * 93,300 North Fork River *Not calculated for this Flood Risk Project
Table : Summary of Discharges Peak Discharge (cfs) Flooding Source Location Drainage Area (Square Miles) 10% Annual Chance 4% Annual Chance 2% Annual Chance 1% Annual Chance Existing 1% Annual Chance Future 0.2% Annual Chance Culvert Creek Downstream side of Smith Lane 1.0 130 * 170 190 * 240 Inundation River Confluence with Big Ocean 1,058 77,200 * 107,000 122,000 132,000 143,000 Inundation River At Coastland 980 73,100 86,800 101,000 116,000 119,000 136,000 Inundation River At Floodville 930 70,500 82,360 97,100 111,000 115,000 130,000 Inundation River At Metropolis 902 69,000 81,100 95,000 109,000 113,000 128,000 Inundation River Confluence with North Fork Inundation River and South Fork Inundation River 879 67,700 * 93,200 107,000 114,00 125,000 North Fork Inundation River Above State Highway 42 137 18,100 * 24,000 27,000 * 31,600 South Fork Inundation River Confluence with North Fork 598 51,100 * 69,700 79,600 * 93,300 *Not calculated for this Flood Risk Project
FIS_Report_Template_May_2014.docx