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<br />Bu c kl ey...B 0 a i...!-"..26 th_-,~v':f1uc,. :.])]il~,ing.s__}5.-,,-,,-d._1.6 <br /> <br /> <br />In this reach of First Creek extending from Station 645+00 where <br /> <br />Bnckley Road crossing is located to StatiOII 69/,+60, the 56th Avenue <br /> <br /> <br />A' crossing, no channelization has heen propose{!. Soils in this reach have <br /> <br /> <br />a high susceptability to erosion because of t:he sandy nature of the mat- <br /> <br /> <br />erials. Mobile Park development immediately east of Buckley Road has <br /> <br /> <br />already startodc Portions of this develJpment, adjacent to South bank <br /> <br /> <br />of First Creek is within the 100-year flood plainc A low earth dyke <br /> <br /> <br />extending from Buckley Road to Station 660+80 is proposed to protect <br /> <br /> <br />this area from flooding. The only imprO\lel11ent suggested in this reach <br /> <br />is the construction of a new bridgE' for 3uckley Road_ <br /> <br />~~.kley Road Brid~ <br /> <br />The Buckley Road bridge at St.~ion 6~5+00 has at present two <br />small. openings. A new bridge at the ~;itr~ ha~ been proposed to pass the <br />100-year flow without overtopping. The bridge will have three spans <br />each of 35.0' with 6.0' as the height of openings. The existillg gas <br />line under the bridge will have to be relocatedc <br /> <br />56th Avenue t,-"__:ro",,Llloadn:_.])ra"i_~..l(j <br /> <br /> <br />The reach extends from Station 694+fiO Lc Station 7l6~-50. SoiJ_s in <br /> <br /> <br />this reach are highly susceptab1e to ero:;j!)o. ]~irst Creek mean(leri_ng <br /> <br /> <br />haseaused severe erosion of the South bank of I:he 'i6th Avenue embank- <br /> <br /> <br />ment which w1.11 need protection. No channelization or structural <br /> <br /> <br />improvements are proposed in this reach, ! l is recommended that Flood <br /> <br /> <br />Plaiu Zoning be adopted for the enlire reac~c <br /> <br />Tower Road to Pi cadil !_~_Ro,,-,I_=_I:J!a\clJ~Jl3 .1~,_1.ZL!~_L29 and._2.Q <br /> <br />First Creek channel in t.his reach e}~teJlding from Stat.ion 716+50 to <br /> <br /> <br />Station 941+25 has a flat slopec The flood plaiu is fairly wide with <br /> <br /> <br />the I:hannel meandering and causing erosion, The widest lOO-year flood <br /> <br /> <br />plaill in the I~irst Creek basin occurs in thl~ vic::inity of the First <br /> <br /> <br />Creek confluence with Tributary Tc The eas: hranch of the Highline <br /> <br /> <br />Cana~ crosses First Creek at Station 883+00 by means of an aqueductc <br /> <br />[1:-13 <br />