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<br />The l'iaterway under the aqueduct is adequatf:' Lo p8.SS the lOO-year fJood. <br /> <br /> <br />Near Station 921+00 it appears that in t~lle ")ast an old irrigation canal <br /> <br /> <br />cros:~ed First Creek. However, all stru(:t~ures u~;ed in this crossing, if <br /> <br /> <br />any, have beell washed away. Water from }'irst CJ-eek for the lOO-year <br /> <br /> <br />flool) will n01~ be carried away by the carLal under existing conditions at <br /> <br /> <br />the ]Joint of intersection. <br /> <br />Drainage\{ay improvemen.ts recommended fo r th is reach are limited to <br />Flood Plain Zoning. <br /> <br />?iccadilly~oad to _ 26~I1A','.'=!lllE-':~_J)r:l,,~I~g;; 2()_Lll__~!1_~_.~? <br /> <br />The reach extends from Station 9"1+;:5'0 Station 1,039+60. First <br />Creel< in this reach and approximately up tu Station 1,026+00, flows in a <br />well defined channel and the lOa-year fl(,od plain is not wide c Immed- <br />iate:ly downst~ream from 26th Avenue the creek is less defined and runs <br />through a flat wide area resulting in a ,'ide 100c-year flood plainc It <br />is recommended that Flood Plain Zoning bee adopted for the entire reachc <br /> <br />It is not: proposed to provide any st.ru(:tura:1 improvements to the <br /> <br /> <br />exisl~ing cros~;ings. Exist:ing roadway bridgl~ at Piccadilly Road crossing <br /> <br /> <br />is adequate to pass the la-year flood [low; however, the laO-year flood <br /> <br /> <br />[Low will overtop the bridge. The freqUEn'-:1 of overtopping the bridge, <br /> <br /> <br />and !lossible clamages to the bridge, do nc,t .iusti,fy major structural <br /> <br /> <br />changes. <br /> <br />~~~l1... A ve n ue !.()_} n t eEs_ta_~_e _~_igl1.waJ} (I ...: J)r~a w i n..&s__.21_an--,!_n <br /> <br />This reach extends from Station l,039+60 to Station 1,112+60c The <br />flood plain is fairly wide. The devel:)pmeILL in this area lS net consid- <br />erab:_e and hence no channelization has bEen recommended. It is recom- <br />mend{~d that fl,ood plain zoning lle adopted f(lr thE~ entire reach. <br /> <br /> <br />No structural improvements are propcsecl for" the 26th Avenue cros- <br /> <br /> <br />sing. the Union Pacific Ra:'_lroad cross ing) :;mitb Road crossing and the <br /> <br /> <br />Gun C:lub Road crossing. The existing ~ridgE~ at the Union Pacific Rail- <br /> <br /> <br />road crossing is adequate to pass the laC-year flood flow, while the re- <br /> <br /> <br />maining ~hree road crossings in this reach ~lj.J.l tle overtopped when a <br /> <br /> <br />LOO-year flood occursc <br /> <br />lI:;~-'9 <br />