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<br />)I
<br />
<br />Ob.tructlonmeansanydam,wall.wharf,embilnkmenl,l"vee.dlke.pile,
<br />abutment, projection. excavation, Channel rectification, bridge, conduit, culvert,
<br />building. "i.", fence, rock, gravel,refuse, fIll, structure or matter in, along,
<br />..cross. or projecting into any channel, watercour.e, or regulatory flood hazard
<br />area which rr,ay Impede. reurdorchange the direction of the flow of water, either
<br />In It,eTfor by catching or collectlngdebri'carried by such water. or that ;0;
<br />placed where the flow of the water might carry the same downstream to the damage
<br />of lIfe or property. An artificial obstruction shall mean any obstruction which
<br />i,notanatu'..! obstruction. A natural obstruction shall mean any rock. tree,
<br />gravel,orothermatter that has been located bya non-human cause,
<br />
<br />Reach means a longitudinal segmentofa stream or river. Areachwil\
<br />genor~include the segment of the flood hazard area where flood heights are
<br />influenced by a man.made or natural obstruction. In an urban area. the segment
<br />of a stream or river between two consecutive bridge crossings would typically
<br />constitute a reach,
<br />
<br />Stream means any natural channel or depression through whiCh water flows
<br />either continuously. Intermittently or periodkally, including any artHiciai
<br />modification of the natural channel or depression,
<br />
<br />Watersh~d ~eans the contributing drainage area above a spe~ifled point on a
<br />stream or basin.
<br />
<br />'0,
<br />
<br />II,
<br />
<br />J'
<br />
<br />REFERWCES
<br />
<br />I.
<br />
<br />Colorado Department of Highways, Topoqraphic Mapping of the
<br />fork VJlley by Air Photo Sur',cys, Grand Junction, ColoradO
<br />Color.)doGeologlcal Survey Departfrlent of Natural Resources and Colo-
<br />r"d" Olvl,i"n of Planning, 1974. RoaringForkandCrystalValleys-
<br />AnenvironrnentalandEngineeringGeologyStudy, Eagle,Garfleld,
<br />Gunn ISDn and PI tkln Count i~s, c.olorado. Envi ronn",ntal Geology No, 8,
<br />
<br />Roaring
<br />1973,
<br />
<br />7,
<br />
<br />),
<br />
<br />Co lor ~ do Wa te r Conse rVa t I on Boa rd, Co lor ado Oepa rtmen t 0 f i~a t u r a I
<br />Resources, 1976. Manual for Estimating Flood Characteristics of
<br />f./atural-FlowStreamslnColorado. Manuallio. 1.
<br />
<br /><,
<br />
<br />Colorado Water Conservation BoardandU.S,OepartrnentofAgricult ure,
<br />M;,ly, 1965, >iaterand Related Land Resources Colorado River Basin in
<br />Colorado. Economic Research Service - Forest Service - Soil Conserva-
<br />tionService, Denver, Colorado
<br />
<br />5,
<br />
<br />u.s. DepartnlCntoftheArmy. Corp5ofEngineers,S.)cramento, Cillifornio
<br />June 1973, FloodPlain Informatlon,RoarlngForkl\iverandCastleand
<br />Hunter Creeks, A.pen, ColoradO,
<br />
<br />6,
<br />
<br />U.S. Department of the Army Corps of Engineers, HydroiogiCEngineerin 9
<br />Center, Da'{isCJlifornla, CompLLterProgr"m7Z3-X6-L20U,.HEC-2liater
<br />Surhce Profiles. 1973.
<br />
<br />7,
<br />
<br />Cllmatoloqical Data - 1975 Colorado Sunmary, U.S, Departrocnt of Comnerce.
<br />National Oceanic ~nd Atmospheric Ad~inistratlve onvironmcntal Data Service.
<br />
<br />8. U. S. Geological Survey, 197~. Io/ater Resources Data for Colorado.
<br />Part I. S'.Jdoce '~ater Records,
<br />
<br />9
<br />
<br />U. S. Geo] o~ i cill Survey, 1964. M~gn I ~ude i1n.: Frequency of Floods in
<br />the United'SUtes. Part 9. Colorado River a".in. \later Supply Pilper
<br />1683. United State. GQvernment Printing Office, Washington. D.C.
<br />
<br />U.S. Geological Survey, 1964. Compililtion. of Records of Surface liaters
<br />of tl're unl ted States. October 1950 to S<oplelnb~r 1960. Part 3. Color,1do
<br />RiverS",in. \oIater-SupplYP<lper 1733. Uniled State, Gov"rnnent Printing
<br />Office, W~shington, O.C.
<br />
<br />U.S. Geoloqic"l Survey, l%~. COinpilation of Recot-d, of Surface \latcrs
<br />of the Un i ted St"tes thro"gh Scpte",ber 19iQ., P~rt 9, Colorado Ri ver
<br />B-"s In. \late r Supp I ~ Pape r 1313. Un i ted States Gove r""'<on t Pr I n t I ng
<br />Officc,',,'a,hingtoo,D,C.
<br />
<br />12,
<br />
<br />\<Iri ghl-~,cldu<;I,1 i n Enuin"ers,
<br />Qu~1 i tv Manage"",nt, PI <In for
<br />
<br />I~(_. flay 197~. ROM inq F(,,~
<br />the Colo. Dept. of Health.
<br />
<br />RI Ve r B~~in Wilter
<br />--~-
<br />
<br />i"
<br />
<br />T~~llnie..1 Ad~"ndun,~ ,"clud,ng ~y<lrolo'l" Field Survey rlOl~~, JrlU rty()rdul ie
<br />Inforr.lt ion (BJckw"ter Computer ProqrJm Input and Dut~ut) -wr Ight-Mc-
<br />ldughl in Engln,,~r', Denv,'r. Colorddo.
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