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<br />53
<br />
<br /> "
<br /> T_6-5
<br /> Rt:coMMF.'iD!:DCHA!'N'EL.-.r:rUt'iAllVECOSTS
<br /> CKAN"'EL TO'I'ALCO"IST. C~7
<br /> C"",~~'RL UC'iG'l1l L'OS'T.CIL.......r<EL ~.
<br /> ~1:GMFSr en ~rr
<br /> DW.A.{I] ,~. ~IMJlO ...
<br /> DW.A-lU ... .".. m
<br /> I>II-'_A.{IJ ,~. \.l'll,6l7 ~,
<br /> DW........ W " "
<br /> i DW.A.o$ ,m ""'"' =
<br /> DW.A-Il6 ,~, ~ w,
<br /> I [)W,B.(l-l 2,150 $U~l.ol(ll O~
<br />I DW,B.(IIl ~ ""'" W,
<br />DW.B-'l\I m $111$56 $'(1'/
<br />I 1),,",8,10 ~ $ll2.3ll1 ...
<br />, 1II0'.8,]l 00 $ll,88'J .]6
<br />I
<br />, L1<UW.A.U ~ "..-'"' OW
<br />I LWW.".lJ =, " "
<br /> S~lJW.A.14 1.010 "'-'"' "'
<br /> SH:>W.A.15 ,,., ~ .
<br /> Stl>W'A.16 ''''' "'" .
<br /> Mn)W,...,I1 1,3'$ "~ rn
<br /> I\lFDW.A,I~ 'M' $l$,(I16 ...
<br /> MIl>W.A,19 '" $1"I611 '"
<br /> Mf1IW,A,:<) 1.llIS $11,444 ...
<br /> ~'FDW.A,21 ~ $1S1,(16J ...
<br /> NF!)w.B41 ~" " "
<br /> ~'l'llW.B-::3 m ..- '"
<br /> 1.l""W_A.l~ "" $;'55,1"" m.
<br /> 1.1-'01"'....,2$ I.rm $1""''''' $lll
<br /> IJ'1>W-B... 1,03$ .'-'" W
<br /> lHIW_ll-ll ~, "'"' '"
<br /> !l'l)W.B.:!ll ,,. $m.w. ...
<br /> LfIOW.A.2'< ~ "',. '"
<br /> IT..\_J! .. WOl.'^' ~
<br /> CC.A..12 ,,.. " "
<br /> CC,Ihl.' ,. ~ "'
<br /> C(;,JIo:l4 ," ..",. W
<br /> CC,Il-~ ,m $IlJS7 ,..
<br /> (X,B-J6 ~ $3I,'J'JoS W
<br /> CC,B-31 ,W " "
<br /> n:.c.JlI " " "
<br /> CC.c,J9 '"' ",m ~
<br /> (X'..'.. ~ $I~~l '"
<br /> "".910 'Mll~$4 ~
<br />
<br />refinement process. Presented on Table 6-5 is aCO,1 estimate for the recommended
<br />channel plans. The selected culvert lmpro\cmcnts are presented on Table 6-6. Shown on
<br />Fi!!ure 6-1 are the locations of the various channel treatmems recommended for further
<br />evaluation. Contained within the Technical Addendum to this report, is the alternative
<br />hydrologic,hydraulic and cost data u>ed in the developmcnt and com parisonofeachof
<br />the alternatives.
<br />Di>cussion of Rccommended Plan
<br />The recommendation of a particular method of treatment for each channcl
<br />sq,'TT1enthasbecnba>eduponthequalitativeandquantitativedatapresented. Foreach
<br />so:gmentthe flood hazard, habitat impacts, operations and maintenance, visual impact.
<br />waterql.lality, and cost aspects have been weighed for each altemative c oncept. Further
<br />refinement of the recommended concepts will be explored during the preliminary design
<br />phase. The channel segment designations (e,g., DW,A-QI, etc.). are coded with the
<br />drainageway name (OW or CC for Diny Woman and Crystal cr-eeks, respectively). the
<br />reach, and the HEC-l channel segment number as shown of the Hydrology Map, Exhibit
<br />I and 2.
<br />DW-A-Ol through DW-A-03: F'Jr these St;gments selective improvements are
<br />recommended for funher evaluation. The improvements to these segments include a
<br />12'xlO' Concrete Box Culvert under Mitchell Street and an II'dO' Concrete Box Culvert
<br />under the Old Denver Highway to carry the 100~year flow. Inlet and outlet
<br />improvements are included for the CBe. Inlet improvemenl~ are proposw for the
<br />Denv~f & Rio nr8nd~ w('stern Railrnarl midge. Improvements to Ihe outlet of the eBe
<br />m the Old Denver Highway along with approximately 500 feet of channel are proposed.
<br />The >cgmentsalso include the installation ofapproximatelyeightdr opstructures,
<br />DW-A-04: For this >egment the floodplain preservation or do-nothing alternative
<br />is recommended for further evaluation.
<br />DW-A-OS throullh DW-A-06: For these segments selective Improvements are
<br />recommended for further evaluation, Improvements to these segments include
<br />appro:<;imately 1,540 fectof bank slope protection along with thIrteen drop strUctures.
<br />Outlctstabiliz.uionattheHighway 105 bridge is al,o proposed.
<br />UW-Il-07 throu~h DW-R-ll: For these segmeno; sele<:livc improvementS are
<br />recommended for further evaluation, Tk improvements proposed for these segment>
<br />include a l[}'x5'concrele box culvert at Somh Park Drive to carry the lO.yearflow, in
<br />order to carry the l{l(l-yeartlows. triple 1O'x4'concretcoox cuh'crts have been proposed
<br />for both the Lake Wooomonr Dri\'c and Augusta Drive crossings. Omlet stabilization
<br />ha~ occn proposed for all three crossings, Ollllet protection along WIth roadway armoring
<br />
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