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<br />Drawings 1_7
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<br />Drawing.' 8
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<br />DrJwing9
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<br />Drawing 10
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<br />Drawing II
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<br />Drawing 12
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<br />Drawing IJ
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<br />Drawitlgl4
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<br />Drowitlg, i5-:0
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<br />Drawing 21
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<br />LIST OF DRAWINGS
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<br />I. INTRODl1CTION
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<br />Suh.V..'aier!;hed Boundary for Study A",.
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<br />Sub.\l;atcfsheuflounu,uy J'ofOfr"SiteAr~a
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<br />II", repon LS pan oj' a study a\lth()"t~d b.v the Urban D"'lOa~e and Flood Controi Di'trlct
<br />I UD&FCD) .n the agrcemellt rcg~rdi~g Outfall Systems Plnnning nnd Flood Halord Ddine~ticm J'or
<br />PI"m Creek Water<heo within Di,trict, dated October 28, [999 (A~re~ment No. 99-05,04), The
<br />study area, shown in Figure 1, consist. 0[' the ponion of the Plum Creek water.,hcd "'uth of the
<br />Chattieid L~kc State Reerention Aren nnd withinlhe Dislriet's Ilonnd"rics, Thc slUdy area is also
<br />located in Dougln~ County,
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<br />Existing '.\i~tenl1edlmperviousne"ol'Study Mea
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<br />Future Watershed lmpet'\lim"ness ofStLluy Area
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<br />The studv i,di,,'ided Into three phases. The tirsl phase (Phase A), ofwhieh thisrepon i,apan.
<br />eovor,thchydmlogiea1.hydmulie,andaltemativee\'alu"liona,1X'ClS. The sccond phase (Phase B)
<br />cover> the prdimin"ry design of the selecled nlternativc, and lhet hirdpha,e(J'haseC)dciinealesthe
<br />Flood I-blard Area_ This rcpon is a compilalio~ of hydrologic calcuh,tions for cxisting and future
<br />land use conditiun! without potcntial ma'tcr planned facilities. Potential effects of pc>,;ible
<br />dminagewny improvements will be considered in [he Pha,e A repon for development of altert1ative
<br />plans,
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<br />E,~i,lit1gWnlershedlmp"rvi()usnc"ofOff.SiteAren
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<br />Future Watershed lmpet'\lioust1c~sofOll.Site Area
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<br />Soil.\.1ap!"orStud)'Area
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<br />Soil Map for Off-Site Area
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<br />SWMM Roming Element' for Stud)' Area
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<br />SW\-1M Routing Ekmenls for Olf.Site A",o
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<br />II. HYDROLOGIC A-'lAL YSIS
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<br />A. {;F.i'\FRAI.
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<br />Thehydr"r.'glcnnaiy,i,fortllestudyareawa,perfonnedtodcfu\e the stonn runoff peak tlow,nlld
<br />'-ollllnc, for the v~rio"s s"h.w~tc"hed~ of lhe Plum Creek walershed within the sludy Mea. l1\c
<br />",mlff,nl,,,,natiot1 i, ,ub,equenlly Lls"d to evaluat~ the ~~i,ting drainage facilitie" potemiol drainage
<br />problem,. Jltem'lti\'c dr~in~ge improvcment" ~nd in lhe development of the Flond Hunni Arca
<br />Delinealion (I'IIA[)) and Prcliminary De,ign studies and rcp~m_
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<br />i'lle stud\' ar~a IS "bmll./Q,h sguare mile" Several large creeks (We,t Plum Creek. Indian Crcd. and
<br />Jarr~ Crc(..~) nnd ,c'-eral small dr~i"a~c basins e"ler the study area fmm the >OLltl.. Th~'e off-site
<br />arcas Itave I'e"",\>ined drainag.e ;lrea "f~h"l1f i46 square mile" TIlls study doe' nm i"clmie Fa'l
<br />l'ILl1l\ C,,'e~ i,'r its drain~~e ~rea), "hi~h c~mbines with \v'c,ll'ltJm Crcck to !;,,'" I'lul11 Creck,
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<br />~ .. " " ... ,- '-' , .- -- ....., .., "......
<br />"''C' W tll" I~r~" ..lC 01 'uc ",,~_, a,"a aU" ell<, '''''''~<.J "u,,'u~. ," '''l'''''~ ,,~,"~"" ,,,,Ii ~ 1>,,,,"
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<br />",-,ert< ,I", ,tll,ly :m'" w"' ,!i"ded lIH~ 'hrc<' w~'er,hed, -th~ F~,!, Smlthea,'t. and We'! rI,e 1:0<1
<br />,qtcrshed "a, J" ideo im,' 175 ;"tl.","er;llcds: the W~'I ""tcr,flcd "J. di,iJ"d imo i~1 "ub.
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