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<br />
<br />l'looJP131n,
<br />
<br />te,.ace, '.ell above and to tbe northo! the ftood plain In reach 11. A
<br />prioately o~ned ca~pgr"und "ecapies the upper end of roach 1 on the east
<br />side of Scate EHghway Z6S; most of the re"ch is used fCl< recreational
<br />pllrpoaes. In reachXos 2 and 3 the flood plda is used prilM[lly for
<br />ratslnglivesrock. The Chall< Creek Stare FtshHatchery Is located to the
<br />$ol.lth of the flood platn 1n the upper end of r..ach 2. Mud, of the area In
<br />re11d'l No~ 4 and S has ken platted for .ubdlvt~tons. This h the are" In
<br />which ~,"t of the development hna taken place, both for residential and
<br />vacatlond"'ellings. !<I addition topotentl1l1 floodproblerns, thepoar
<br /><lrlllnage characterhtlcs of flood plain ""tIs ~re " eo"~trllint to septIc
<br />8yste~8 and wells for dO~Atlc water. The flood plain and adjacent area 10
<br />reach 4 through 6 1s in the National Forest wIth an toter~logllng of private
<br />ownenhip "ithln the public land boundaries. Many of the permanent resI-
<br />dent. co",",ute to and are elllployed in the neighboring tOWll8 of 8,oeM Viata
<br />aodSalida.
<br />
<br />Beginningilt the coofluence "ith the,\rkao.asRiver, the flood plainatudy
<br />area extends upstream along Chalk Creek approximately 11.9 mIles to a poiot
<br />Ju~t be10" the Ca.cade Cil1;lpgrallnd in the San Isabel ~atiollal Forest. The
<br />confluence of Chalk Creek with ArkGlosaA RIver Lles lna narta" elltrenched
<br />
<br />ca"yoo at the lower study limIt. Effecta of potentIal flooding on the
<br />Arkanaas Rlver are not included In t!lis study. For study purposes and ease
<br />of Identlfyinglocatloos in the floodplain, the study area hns been dIvided
<br />into stream segments called reaches. 6eginntngat the lower end and
<br />progressing upstream are reach numbers 1 through 6. To assist readers,
<br />information in the rep'Ht tables h i\lven in units of common measure and
<br />"etric units. O"e mile>; h equal to 1.6093 kilo~eters.
<br />
<br />T1>.. reach d1stances <~re as follows:
<br /> Reach Number Distan"" ioHUes (kUom..tea)
<br /> , '.0 (1.61)
<br /> 2 '.J (5.31)
<br /> J '.0 0.06)
<br /> , ,., (1.77)
<br /> 5 '" (4.34)
<br /> 6 >'9 (3.06)
<br /> TCltal 11.9 milea (19.15kro)
<br />
<br />Debris Flo"s (Mudflows)
<br />
<br />Just to the north of re<leh 5 is th" ru~ged <I"d scenic I'lrea called the 'Chalk.
<br />CHffs". This [Jl()untainolls area contains _ny .Heep, relatively sllIIlll
<br />drdnage b.asin~ ""leh, on oc"asion, d1sch"rge targe qu"ntLties of ll1ud ,u,d
<br />debr1s onto a broad, moderately slo[>in;: slldaee at the b.~se of the cliff..
<br />Significant land else conrlLets ,,~l.st ~"ause this slIrhe.. Is aiso popll1ar
<br />for tOll r ls ~ re so rts and vaca UOO find pc r"", nent Ita,"" a.
<br />
<br />A ..ap sho"Lng the """tershed al\d Hlldy are,' '"Ith r"",,1t locations follows page
<br />
<br />5.
<br />
<br />The Chalk CUfia are part of the :1OlHtt Prlt\ceton l>'thollth, c"lIl[>osed of
<br />Tertiary qu;Htz mon~ooite. The quartz, feldspar, ",ld mtca that make up
<br />tlt,>"e roch have \lndergone hydroth.,r"",! alter.lti<>n omlch ~lv"s tlte Cliffs
<br />their "d\.,lky" ~p[>".lr~oc~. .h" Cl!(f~ h.,,,,, .ll~t\ "~l,~rteo~,'d .,~t""~l,,...
<br />
<br />5ettleOle.nt in th~ flaQu pLILn is ~par"" "".1 d,'",>!op",,,nt has hcen for
<br />ran~htng .,,,,j r,'cr~;ltion"t use. The <:01;lmunlly of Nathrop is located on "
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