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tJorth Eagkvis Droiroge Cmoept Phase <br />The futue gravel pit pads roe mapped try scamirg the mirirg roclarnafiarr plan for the site irto the computer <br />and then digitizig awrtovs for the pads frvrr that sarned eroge The reclanation plar cos proyirkd by the Mr. <br />Carl Hill, orrrer of the site The pbn ras prepard ~ 1994 by Tuttle Applegate, Inc, engireas for the orrrv. <br />Conshvctian plans far the existig Eogkvrew Pad prepaed by R6 Engineers, Inc was similaiy sraered into n <br />roster file image, imparted to the electronic drorig file, ad digitized to obtain 1' amtour irtavds, and bovtias <br />and sizes of the spilhray ord discharge stnrcinaes <br />These ihra son+ces of cantor information rer+e then merged ord n new d'ngitd tarn model anted far the <br />grand from B Street rortfi ihrv the grovel pits, extending some 3,300 feet rwrth-south by 1,700 feet emtaest. <br />The 6I5 topo mapping and oaid photos was also used to a+mte m electronic map for the arndysis of the #3 Ditch <br />s?arm nnoff. TMt map extends about 7,400 oast-nest to coyer the #3 fran the F St spill stnrhre to <br />downstrean of the Eagkvia Ford. <br />~ These AutoCAD2002 ekctrwnic drorigs with acrid photo 6ackgronnd ord derived dgitd tenor mold rere used <br /> to evaknote the concepts listed above. Copies of the mops are pnsntcd it this report far each of the anoepts <br />• evokwted <br /> ANALYSZb <br />• We evduated eactn axxzpt by settig ~ a hydrodic model of the shvchRS -Prods, pipes, chmrrKJs• spilh>ways, <br />. weirs, orifices, ditches, box culverts - in the SWMN1 computer pogrom. We use XP-SWMM 2000 which <br /> 'vroaponotes EYMSWMM vosion 4.4 ad provides on iderfoce to Bose data entry and output. A schematic drorig <br />• of each XP-SWMM model is incMded for each arroept evohnted <br />• Storm runoff hydrogophs (goph of flow rate vva:ans tiae) rye token from the I~.YOnc 6 Mdasm Pion os <br />• modified by R6 Erginms far the Eogkvlew Pad design Their modifications to the Comp Pion ryroff hydrogopks <br /> consisted of canbin:g the'fuhre cardifianv^ nmff nrpstrmn of 4'^ St of Epple Pork pond (reno~d pond #307 <br />. ord reduced noting for pond #308) rich the .proposed caditiand' SWMM model for the basin This combination of <br /> <br />• 'future' andHion flocs on •pnoposed' condition siryncinres 6nposed the worst case hydradic loadiw} We have <br /> adopted the sane approach to the modelig of the anoepts annsidered in this study. <br />• ' <br /> nrrts, idurtrfied by the model rude name os <br />Storm rvuff hydrogroplns roe arput to the XP-SWMM model at four po <br />• #3t7 Eppk - Lasorn Ditch at north side of 4"' St <br /> • Pad 321 - Eogkvier Paid bed S,rb-burin #21 <br /> • F CBC Up - 47 ones of Bnm droinig to north side of F St at exist property lire <br /> • #3Up - #3 Ditch at rest side of Eagkviar Pond <br />The idivid,xd hydrogrophs for ouch pout ae incMnded in the APPQdbc of this Report. <br />Frank Miltarba'ga', IadRape archtted, assisted in the field layout of the adtemate solutions for chomd bcatians <br />and prepared perspective sketches to help visudize the impact of each alternate. The prinripd foul of his effort <br />was: <br />to best fit the proposed rate into the existig tenor with mirimm disha~bance to the embormmt <br />to rvxkxe The yiad import of pnoposed rn9i1°°i"J slnnchres on the ladseape <br />• to help ensue the f:uslned prv jeet coq benefit the people of the nragfrbaiuod <br />• to prepare ocurate perspective sbetdws that wadd a>twronioate the proposed wait effectively <br />His suggestions os to proposed clmm~el bcatian ad digment Moe 6eon adopted o m effort to better fit the <br />existing grand and rneighbainooda His perspective sketches of the axnceph studkd are irclnded rich the <br />disnnsion of mch alterynate <br />Page b <br />