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<br />I <br />I original floodway analysis through the BNRR ponding area, HEC-2 output for the post-project <br />I condition floodplain and flood way analyses is provided in Section D of the Technical Addendum, <br /> Table 4,5 Summary of Post-Project Condition Floodway Results, <br />I <br /> HEC-2 <br /> FIRM Cross Base Flood Elevation Floodway WSEL Change in WSEL' <br />I Panel ID Section (ft, NGVD) (ft, NGVD) <br /> 16430 4993.4 4993.4 0,0 <br />I BF 17380 4993.-+ 4993.4 0,0 <br /> 18075 4993.4 4993.4 0,0 <br /> BG 18135 4993.4 4993.4 0.0 <br />I 18168 4993.4 4993.4 0,0 <br /> 18240 4993.4 4993.4 0,0 <br />I 18770 4993,3 4993,3 0,0 <br />B1 19337 4994,7 4994,7 0,0 <br /> 19830 4997.4 4997.4 0,0 <br />I BJ 19880 4997,7 4997,7 0,0 <br /> BK 20315 4999,3 4999,3 0,0 <br />I ' Change in WSEL = Floodway WSEL - BFE <br />I <br /> 4.4 Floodplain and Floodway Delineation <br />I Post-project condition 100- and 500-year floodplain boundaries and floodway boundaries <br />I were delineated on the 1993 work map, from the BNRR embankment to Cross Section 20315, <br />These post-project condition floodplain and floodway boundaries are shown on Sheets 1 and 2, <br />I Comparison of the post-project 100-year floodplain and floodway boundaries with the effective <br />boundaries indicated on the original work map indicate the following differences: (a) a minor <br /> contraction of the floodplain and floodway boundaries in the vicinity of the Sherwood Lateral <br />I relocation near Cross Section 19337; (b) exclusion of the Centre A venue roadway from both the <br /> 100-year floodplain and floodway; and (c) modifications to both floodplains and the floodway in <br />I the vicinity of the Arthur Ditch crossing of Spring Creek where discrepancies in the previous <br />mapping were noted, <br />I <br />I <br /> . <br />I T:\QPEN\CllcsrtDl "cocsrtDl tema-l,O~IR tin:.Jl-rp1.wpd 22 ANdERSON CONsulTiNG ENGiNEERS, INC. <br />