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TABLE 3 <br /> HYDRAULIC CHARACTERISTICS <br /> Alternative Discharge Upstream Area Velocity <br /> (cfs) Flood Stage (sq.ft.) (fps) <br /> Elevation <br /> 1,200 895.46 247 4.9 <br /> Existing structure <br /> 48 Ft. Concrete Flat Slab Bridge 1,200 895.45 307 3.9 <br /> on Vertical Pile-encased (A5) <br /> Abutments with No Skew. <br /> (Proposed) <br /> 100-Year Flood at Proposed Structure <br /> Drainage area = 24.0 sq. m i. <br /> Waterway area = 307 sq. ft. <br /> V= 3.9 fps <br /> Q100= 1,200 cfs <br /> Design highwater elevation upstream of bridge (Q100)= 895.45 <br /> Q2 highwater elevation = 893.2 <br /> Scour critical code 8 <br /> 7 u:\41-0668.00-dane county,town bristol,elder lane\reports\bsr\b-13-672 siz.doc <br /> 41-0668.00 <br />