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<br />UNITED STATES
<br />DEPARTMENT OF THE INTERIOR
<br />GEOLOGICAL SURVEY
<br />
<br />MAP OF FLOOD-PRONE AREAS
<br />
<br />ATWOOD QUADRANGLE
<br />COLORAOO-LOGAN co,
<br />7.5 MINUTE SERiES (TOPOGRAPHIC)
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<br />40"37'30'.
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<br />40'30
<br />103'22'30" '38
<br />Approxjm~ltf' Uoundaril>~ of f1()od.pronf~ areas are stwwn on this map. There is. on th€'
<br />avera~{>, ahout 1 chan('p in 100 that the desig-nah'd areas will be inundatE'd in any year.
<br />Thi~ information il'l important to JJublic agE-'ndes and private citizens con(,t~rned with future
<br />land (leYt'/opments.
<br />The f1(}(Hl-prone areas have heen dplinf'uted throug-h USE-' of f"t;>adily availahh' informa-
<br />tion nn J.ml-it flriod~ rather th:m from rletailt.ci field surveys and inspections. In g-pneral,
<br />tht-' delint"ated areas are for natural (:'onditions and do not take into ('onsideration tht> pOS-
<br />sihh.' I:'ffl"cts of t'xilitinJ( 01' propo!olt'd flood ('ontrol structurt,'S ex(:('pl where those cfft-'cts
<br />{'ould bl.' evaluated. Flood areas havt' been identified for: (1) urban area~ when' the np-
<br />stream drainagt> ba~in eXC'f'{>dH 2[, square miles. (2) rural arl'as in humid n.'g'ions where tht'
<br />upstn'am draina~e basin excet'cIs 100 squan> mile!;, (3) rural art.,~,g in semiarid l'(.gions where
<br />the up::;tream drainage basin (!xceeds 2;')0 ~quare miles, and CO smaller drainag-t> bagill~.
<br />dt.vending- on topography and Jx)tential u!;e of tht> flood plains.
<br />The i:mth ConRress. in Hou!:>e Document 4f>S, recommended tlH' preparation of flood-prone
<br />area maps to assist in minimizing flood Josse!; by quickly irlent.ifying the areas of putential
<br />flood hazards. More, dt'tail(>d f10ml information may be r{>quirerl for other purposes such
<br />a!; structural designs. economic studit's. or formulation of land-use regulations. Such de.
<br />t...'\iled information may htl obt. :ned from tht' U.S. Geological Surve.y, other Federal ug-encies,
<br />or State. local, and private agencies.
<br />
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<br />ti39
<br />
<br />R. 53 w 640
<br />
<br />fMEF?INOJ
<br />5364 I V NE
<br />
<br />'44
<br />
<br />17'30"
<br />
<br />'45
<br />
<br />'46
<br />
<br />. '..TIl..'O.._6€Ol.aw'C"O'LW.."..................T"".l>.C.
<br />BRUSU 2! MI. I
<br />
<br />I
<br />=~-=:::r:
<br />
<br />SCALE 124000
<br />I 0
<br />J:: E3._.:..~...;:-J:- ~ :::'i~ _~~_~a:::- .:~,,"--- ::::., ~,..:::::::;:=-="'=""=--+---~._-
<br />1000 0 1000 2000 3,)00 4000 5000 6000 7000 fEET
<br />~.Fi::- ~::..-=---s:: --::E="':::::~-- _ -----:I,~ ?,':r=- :::'--:::.:::~J
<br />~ :1'"'''T-7E-:::i:-:.r~-::;i___.J~::r:-~~ =s::-_.:-~-----::::::._- ~ KILOMETER
<br />CONTOUR INTERVAL 10 FEET
<br />DATUr.~ 1$ MfAN S[A [Vt
<br />This work was performed by the U.S. Geological Survey for
<br />and funded by the Federal Insurance Administration,
<br />Department of Housing and Urban Development, to meet
<br />provisions of the National Flood Insurance Act of 1968.
<br />
<br />EXPLAN A nON
<br />
<br />1 MILE
<br />3
<br />
<br />Flood boundaries were e!ottimat.ed from:
<br />Reg-ional staR('-frequency relations.
<br />
<br />.
<br />
<br />COLORADO
<br />
<br />ATWOOD. COLO.
<br />N4030-W1031517,5
<br />Base by U.S. Geological Survey
<br />1951
<br />
<br />QUADPANGLE LOCATiON
<br />
<br />1974
<br />
<br />l,,,,.rUJ ll~v<,.O/ll l'Oll
<br />
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