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<br />. <br /> <br />C\'iCB 1;'LOOI) H;Y~!I: "J ImVn:i'; SUI-l;''ll\RY <br />1\51'en VilJ:1<;.c Subdivision <br />pitl:i.l' County <br /> <br />July JG, 1979 <br /> <br />6ubnl:l \;."l:_d J_b <br /> <br />Memornndum dated JWle 14, 1979 Dnd General Submission and Growth <br />Hanagencnt application prcpnHJd by Design ,'Yorkshop, Inc., dated ~lay 31, <br />1979. <br /> <br />References <br /> <br />In addition to the above, we referred to the report enti~lcd "Floo~- <br />plain Information Report, Roarinq Fork River, Aspen ~o Basalt, Pitkjn <br />by \vright-McLau' hlin r;.!lSineers in l,uqus t 1 () 7 G. <br />approved by our board on January 4, 1977. <br /> <br /> <br />The applicant's Non-Buildable J0nds Summary on page 9 of the <br />applicatjon does not reference the aho"ereport as a source of their <br />floodplain informai:ion. No flooc11'lairl is shm'!J1 on the map on pClge 10 <br />for the unnamed tributary draining appro~imately 1.3 square miles and <br />parallel to Watson Divide road.. An approximation would probably suffice. <br /> <br />Rase 11apjJi:2~ <br /> <br />The source of .the C>Tlnlicant's base };laD, scale' 1 inch ~ 1;00 feet i:.nd <br />5 foot contonr interval, is not identified. The elevations cited in <br />this rcvie\.; corres?onc1 to the mapping p:::-e:i)a:-ed for the \-Jright-:--1c.:LauShlir: <br />Floodplain Information Report. No study Has made to see if the two !i1ilpS <br />are CO,'lP2. table. <br /> <br />!!ydro'logy <br /> <br />The 100-year discharge in the Roarins Fork River is 8,300 cfs ior <br />this reach according to the floodplain study. The drainage area be~ow <br />Woody Creek is about 420 square miles. <br /> <br />Flood Hazard <br /> <br />Fotlrteen of the 20 proposed single fClH.ily hom.::>sites are planned <br />along the "base of a hillside" south-west of Colorado State Highway <br />82. None of theSE:: sites appear to be in a 100- e2r floodplain. Ho\]- <br />ever, a geo o'list' s opirllon lS recomncnc.cd for the potentlal azard <br />from rock or mud slides in these areas. <br /> <br />Six of the 20 proposed homesitcs are planned along the Roaring Fork <br />River and are to be serviced by individual wells and septic systems. <br /> <br />In transferor: ng the floodplain bounderies from the Wright-I-lcLa',c!hlin <br />report to the app:.icant's Land Use Plan, \.,c find all six of these sites <br />are in or sufficiently close to the flood boundary line to \.Jarrant more <br />careful st.udy. 'rLe following table of lr.O"year flood ele'Jatlons ha:.; <br />been lnterpretcd [rom information published in the floodpl~ih report. <br /> <br />-,. <br /> <br />J <br />