Table 3 - Flood Data Box (Existing and Proposed)
Existing Structure No. Cross Drain Size Design Flood Base Flood Overtopping Flood Greatest Flood
2% PROB 50 YR FREQ 1% PROB 100 YR FREQ
Discharge Stage Discharge Stage Discharge Stage PROB % FREQ YR Discharge Stage PROB % FREQ YR
EX-0 1-8'x8' 426.99 48.30 547.15 50.24 581.42 50.67 0.80% 124
EX-1 1-4'x5' 213.20 36.96 245.51 38.53 261.90 39.42 0.51% 197
EX-2 1-30" 38.94 21.81 42.06 22.23 43.21 22.40 0.64% 156
EX-3 2-24" 33.60 21.81 40.93 22.23 42.83 22.40 0.92% 108
Proposed Structure No. Cross Drain Size Design Flood Base Flood Overtopping Flood Greatest Flood
2% PROB 50 YR FREQ 1% PROB 100 YR FREQ
Discharge Stage Discharge Stage Discharge Stage PROB % FREQ YR Discharge Stage PROB % FREQ YR
EX-0 1-8'x8' 427.01 48.30 547.15 50.24 665.89 51.73 0.2% 500
CD-1 1-8'x8' 268.74 34.46 348.87 35.54 587.70 39.01 0.2% 500
CD-2 2-30" 66.28 21.86 73.39 22.25 101.16 24.07 0.2% 500
Page | 17