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<br />VII. CO[f ESTl~~I~ <br /> <br />""'ideningof UWY6 Hridl:c <br />. Width of each bridge is 38 feet <br />. Oldertimbcrbridgewouldbereplaced <br />. 20' x 8' RCBs would be added to the wuthMund Ilridge as an alt~mativc to widelllng the <br />bridge <br /> <br />Conceptual designs for all alternatives were prepan:d for the proposed improvements in sufficient <br />Jdail to J~terminc and document cunstruction quantitics and subsequently, a planning cost estimate. <br />Topographic mapping at a scale of 1 "=800' was \I~ed as base mapping for conceptual designs. Critcna <br />u~ed for prtparin.gquantitic~ were as follows: <br /> <br />CbannelSeeti"ns <br />. Trapcwidalsection <br />. SizeusingnormaldepthorHEC-2 <br />. 2: I sidcslopes for the major channd improvements at the HWY 6 and UPRR <br />. 3: 1 sideslopes for the low fiow channel downstream of HWY 6 <br /> <br />Road!l}rivcway [Iepres~ions <br />. 24'widenon-pavedroadscction <br />. Maximumgrade5% <br />. lowt1owculverts <br />. Surfacehardeningalongehanndbott(lJn <br /> <br />Drop Structures <br />. ConcrelecutoffwaJlforthcentirewidthllftht:channcl <br />. 5 feel of Type M Riprap upstream of tht: cutoJT wall and 25 feet of Type H Riprap <br />dO\>'"Ilstreamofthecutoffwall <br /> <br />LandAequi~ition f"rLevees <br />. Assume 5 feet beyond the toe of the levee (both sides) to d~tllrmine required right-of-way, <br />. Assum~ tCll simplepropcrt}'aequisition for land under levee>lchanncl, <br />. A"sum~ flow casement for land bctwe~n lev~es if land can still be farmed <br /> <br />(hcrtopLevees(50-Year) <br />. IOfccttopwidth <br />.1:lsideslopt:s <br />. Rlprapslopeproteetion <br />. Nofreeboard <br /> <br />Using the conceptual design, an estimate of construction quantities wa, prepared for the proposed <br />improvements. The~C (Juantitie~ were tabulatlld and assigned a unit cost, and a construction eo~t was <br />d~termined. Unit costs wc,': 'lerived from values published by FEMA (0.2 Numeric Cost Code <br />Listing for Region ill. Where n",,>J~..-j, the published rates were supplemented and altered to ret1eet <br />local conditions with additional unit pric!"s derived from acma! bid tabulations forsimiJar work as <br />published by the Urb:ffi Drainagc and Flood C:'~lrol Distri,,. ~'rill;::;:' "nil oo'rts for each item arll <br />p,esented in the 1"II()wingtabJc, <br /> <br />Standartl L"vees (lOll-Yellr) <br />. 10 feet top width <br />. 3:1 sidc~lopes <br />. 3feetminimumoffteeboard <br /> <br />TlIble:\. Unit (;ust, for l'lIwn"e Cret'k Improv...rncols <br /> <br />Item <br /> <br />Unit <br /> <br />Cost <br /> <br />Flondwalls <br />. I I~li)t thick <br />. Footing meding CDOT standard drawings <br />.3feetofcoveroverfootinp <br />. 3 t"etlllinilll\lmofrre~hoarJ <br /> <br />~lobiliZlltilln <br />Engineering <br />l-egal/Adminislration <br />Property Acquisitioo (fee simple) <br />l'ropcrty Acquisition (f]"w Easelllcnt) <br />ClearIng & Grubbing <br />Remove & Replace Topsoil <br />Fxcavation& Fill for Levccs <br />Riprap <br />Seedingfll,Revcgetatioll <br />Structural Concrct~ <br />6"1'1.111 D~pthAsphait <br />Bridses <br />C()umy Road i)crres~i,\n <br />I)ri\'cway[)~pre_"i"" <br /> <br />LS <br />l.S <br />LS <br />AC <br />AC <br />AC <br />CY <br />CY <br />TN <br />AC <br />CY <br />SY <br />SF <br /> <br />5% ofConslructionCosl <br />12% of Construction Cost <br />5% of Construction Cost <br />$2,500.00 <br />1> 500.00 <br />$ 500.00 <br />$ 2,00 <br />$ 3.00 <br />$ 35,00 <br />53,SOO.OO <br />S SOO.OU <br />S 12.00 <br />S 70.00 <br /> <br />ningLeHcs <br />. IOfcdtopwidth <br />. 3:1 sideslopcs on the ~hanncl side <br />. 5:1 sideslopesonthclandwardsld~ <br />. 3fcctminimumoffrccboard <br /> <br />I-to~<ll-t~isc' <br />. 24 k,'t,,;Mp~vernCIl1'eelion <br />. J:lsideslopes <br />. .1I.1aximum 5% longitudinal slor~ <br /> <br />LF <br /> <br />. ""'H' <br />~ Iv.Vv <br /> <br />IJ; <br /> <br />$ 30,00 <br /> <br />I h<:s~ lInit costs include h..)lh materials, instaliat;on, and r~pair of disturlx.'d pl\lpcrty, Th~s~ C(1~ts arc <br />ba~~d upon bid tabulations from simila{ projccts along th~ Front Range, <br /> <br />" <br /> <br />n <br />