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TABLE 1 <br /> FLOOD FREQUENCY vs. DISCHARGE <br /> RECURRENCE EXCEEDANCE DISCHARGE <br /> INTERVAL PROBABILITY (cfs) <br /> (Years) <br /> 2 50% 460 <br /> 5 20% 570 <br /> 10 10% 700 <br /> 25 4% 900 <br /> 50 2% 1,050 <br /> 100 1% 1,200 <br /> TABLE 2 <br /> COST ANALYSIS <br /> ESTIMATED <br /> STRUCTURE DESCRIPTION CONSTRUCTION COST <br /> 46 Ft. Concrete Flat Slab Bridge on <br /> Vertical Pile-encased (A5)Abutments $160,000 <br /> with No Skew. <br /> 48 Ft. Concrete Flat Slab Bridge on <br /> Vertical Pile-encased (A5)Abutments $165,000 <br /> with No Skew. (Proposed) <br /> 50 Ft. Concrete Flat Slab Bridge on <br /> Vertical Pile-encased(A5)Abutments $170,000 <br /> with No Skew. <br /> Structure lengths shown are from centerline to centerline of abutments. The bridge costs <br /> shown were determined by using square-foot costs for similar structures in similar geographic <br /> areas. Costs do not include removal of the old bridge, approach roadw ay work, construction <br /> engineering, or other contingency items. <br /> 6 u:\41-0668.00-dane county,town bristol,elder lane\reports\bsr\b-13-672_siz.doc <br /> 41-0668.00 <br />