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C150069 Benefits & Potential Roles Report
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C150069 Benefits & Potential Roles Report
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Last modified
4/13/2010 1:46:45 PM
Creation date
4/17/2008 10:32:29 AM
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Template:
Loan Projects
Contract/PO #
C150069
Contractor Name
Colorado State University
Contract Type
MOU
Water District
0
Loan Projects - Doc Type
Report
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<br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br />. <br /> <br />Much is already I..nown about dual S)'Slcms.b The concept is not tll.'\\. ^ reccnt regional survey in <br />northeast Colorado reported thai pn:ssurizcd secondary supply systems arc ~ing installed more <br />frcljuclIlly in the urban fringe areas. often by subdivision dcvclopcrs.7 Several developer... have lx-cn VCI)' <br />innovative in this regard and arc moving ahead with their unique design plans. I hmevcr. their irrig;l1ion <br />s)'stellls arc frequently' left 10 hornclmncrs' associations (1I0As) 10 manage. Design approaches lend to <br />vary greall)'. and there is olkn liulc agreement on!l:H.:a] standards for sccund;u)' systems. uther than Itmse <br />suggested by the AnlC'rkan Water Works Association. Some ll1unicira]iti~'s have dl.'vclnpl."d pressurized <br />secondary suppl) systems to irrigate par!.;s and otht'r recreational facilities. many of these invoh'ing <br />pumping out of open ditch s)'stems or adjacent storage I:lcilities. In only a fc\\ in!>tances has this !.;ind of <br />water service been e\lended by municipalities to residential lots. and onl)' in limited areas oftO\\n.- <br /> <br />ligun:". ...a mndl:sll) imprml:d ro.'\l.'nw <br />slrcamfurlh.:sccntilics..... <br /> <br />ItMlwuldhdp <br />m"..kmi/cirrigatitln <br />l:anaIS)SIl:n1San<1 <br />ho:lPlIrlmCrSrnn\.: <br />10 high.:rcnd <br />irrigalillll <br />Icchnnlugicsand <br />additillnalcropping <br />s~ "tcrns. <br />mcan\\hik... <br /> <br />k <br />~'I <br /> <br />I <br /> <br /> <br />...higIK'r,'nJ <br />irrigati(.n <br />k"(;hnologicsmcan <br />\\alCrCIlIISCr\cd. <br />hcnclitingallofus. <br /> <br />Mcan\\ hile. rural dOlllestic walcr <br />suppliers providing treated water to man) <br />of the unincorJ~)rated arcas of <br />northeastern Colorado appear to WeklltTle <br />the introduction of pressurized secondary <br />supply systems, as long as Ihcir 0\\11 <br />wall:r delh'cl) systcm is nnt ad\'ersd)' <br />alTl'cted. Generally. nlral domestic water <br />dislricts have not indicated intl'n:st in <br />prO\ iding sl'clJl1daT) water servkc <br />themselves. The viewpoints of <br />developers,municipalitics and rurJI <br />domestic watl'r suppliers may change in <br />the futurl'. For the present. thl're dOl's not <br />appear to tlc much alignllll'nt in <br />pcrsp.:clivl's. All panics arc gell\.'rally <br />procel'ding with their own plans and <br />philosophies. <br /> <br />What is new, atlcast in Colorado, is the idea of traditional agrit'u1tural water supplil'rs providing <br />pressuri/cd sccondary water sl'rvice to residential or cOll1mercial users and lnts. As \\c will see, having <br />irrigation districts or canal comp.mies supply set'ondal)' water is a far more common practice in othcr <br />states, particularly Utah and Idaho (Figure 7). If these entities arc to becomc involved in SCctlnd.H)' water <br />supply in Colorado. the,y need infomlation about \\ hat ris!.;s they arc facing. \\hat benelits can bs: e\pected <br />from entering into such service. and how long it might ta!.;e for these benefits to be realilcd. Case studics <br />will be pre~nted in Chapter 8 and Q, assessing the risks and Ix>nelits Illr 1\\'0 canal cmnp.lIlies <br />participating in the stud)'. <br /> <br />Advantages for ~1ulliciflalities <br /> <br />I'ressurill'd secondary water supply may help to reduce the cost of providing tre.lIed water \\ithin <br />urban grO\\Ih boundary areas or unincorporated areas by reducing the need to develop water tr,'atment <br />facilities to provide for both indoor and outdoor wate-r needs. Toda). water applications for outduor lIse <br />Oil residential parcels or Inls may comprise more than 50 percent of annU<lllrealed W<lll'r demand in mall)' <br />instances.~ SubstilUting pressurized untreated \\atl'r 10 mect this (Iutdoor demand would greatly reduec <br />the dl'mand 011 existing municipal and ruml domestic WaleI' treatment systems. <br /> <br />t\lost llutdl)or water demand occurs in a span of three to four l)Ca!.; ll10nths of use in arid areas.IO <br />Secondary water systems would allow l11unicipalities to downscale the capacity and capitalization of <br />waler treallllentl~cilili,'s built 10 ml.'el this pea!.; sumlTler llsilge (Figure R). II appears that for municipal <br /> <br />" <br />
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