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'" ~ < ,~ ~ -.: 37"45' _~ ~.i..... 107"45' 1350000 fEEl 159 160 ~' Approximate boundaries of flood. prone areas are shown on thi!\ map. There is, on the ,!>' averap:e. about 1 chance in 100 that the desillnated areas will be inundated in any year. v~(.. This information is important to public a~pncit's and private citizens ('oncerned with future ,j\O, ~ land developments. " <V~f)q The fJood.prone areas have bt.'en delineated through us.e of r(>adily available in forma. .,t!-v", lion on past floods rather than from detailed field 8urveys and inspections. In general, ..;.0 the rlt.Jin€'at(>d nreas are for natural conditions and do not take into ('onsidt"ration the pos- ,<v sibil' effects of existing or proposed flood control structures exeept where those effects could bt. evaluah>d. Flood areas have bt'en identified for: (l) urban areas where the up. strlc'am rlrainage basin excf'f>(ls 25 square miles, l2) rural area!"! in humid rt>gions where the upstream drainaire basin excl;'eds 100 square miles, (3) rural areas in semiarid. ft'gions "..-here the upstream drainage basin exceeds 2.'>0 square milt,s, and (4) smallt>r drainage hasins, depending on topof.{raphy and potential use of the flood plains. Tht. S9th Congress, in House Document 46$), re('ommendt'd the preparation of flood-prollt' area mavs to assist in minimizing flood lo~ses by quickly identifying the areas of potential flood hazards. Mort:, detailed flood information may be required for other purposes such as structural desi~ns, economic studies, or formulntion of land-use n>gulations. Such de. tailed information may bt.~ obtained from the U.S. Geological Survey, other F'edNal a~encies, or State, local, and private agencie~. . :j 42'30" '62 '63 1 TfT..-r----' .-,.~..U"::s;B:;stn "<",~z;r "\ ~ )( '""'0 1\ ' ~ \ \ ,'1--'. '- ( J2396X~X X, !J ,~ '. ~' \, \ ~ . \J x'" "'. x{\ If'OO'' \{. x llr l~ 1'''-,. I \~\?: \ '25,96 ). \ ~ \\ \ ) '\ ~.r 1(;: ;."-- 'r .\. ,( \~\ ~_, , ( :::-,\ ') jel ~ (5 )" .01 "1'1 I~ I ;:<::J ~ I ~ ~ I r \ I ~/ /. 1 , \ 120J2't. / ~ ") , I ' { 1-"n:1 oC \( \ I'.l( Y/"'\ \.: i > r: -,-:~ltr.: / x { 0 \ ( " \x...--...-t {] 1 '-r' " . ) I > :) } " ....., '\ 11380000fE.~1 , ..... i "': SILVERTON QUADRANGLE COLORADO-SAN JUAN CO 7 MINUTE SERIES (TOPOGRAPHIC) SW ''; Sll VEi?TON 10: QUADRANCLE '68 ~ ,0/- ,....if' f)~ <v'? Yf:~ 0' l '"', ,-,- ........~t;t;.j'; <<&1....t.. <'-1' '" '0" <' UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY MAP OF FLOOD-PRONE AREAS I 107"45 - " M, .-.- 37'5230" RE \ol IN 4d'J 'AS MI ,."' ....... 161000...E. . [,""',~::; ';: ~ - ';C'~'i:7 '0;'~ ;Cif.l; ~ ,,s!::F.. ~ :,,,:.~'--::-r+~' --:- ~ I. ~~~ ;'f ~ r ~.>>,. I. f {'h:\tt:.mn'~J"a-'~ '-C' ~.,. . -/ (f J< ~~t- ". ., t r/ :",\",~ ,f"~. _:~..J!..(t 10464 t~ '\.x 41950l:l0n1N ,~~ ,,--(>1 C"Jd''-A.'' -." :;l~ x." , "/ ~t'l' . r I :it- ...;;. ,{) O(h 'i. F/"< <. X"'" /"" F~<" -"'\' r---' '-- " \ ""' lS"~ ",,-. r- '- '- ' ~ e 44.59/ NW f/RONTONJ ~6~r\ ~~r i- }, J... ' . '"ai_I"" < VJ.fi~ ~ j 4(] '66 r1 r....-'- '-r;:::- -"-,-----,.--,........--.-~':o"---.- -~-.; ,..., /;; J()24!1"}~k .~ . t, ~( ~ ,*- ) T ' " ...... f" C ~ _ ;r...~f.;1 \ <T ~:i ~.. 1::(1)' !/ l,' ~~_ "-. ), \ ~ ,~ (" ~4- I '...-."\........," '-;;. ~ \ '''^' 'I' ' PI',.,;' " , h ,; , """ k ,.. ", .I J .v " ~ , - P' 107"3730 ~--r- ---.-:c-~.,..,... 37' 52 30- ~ ..., l(. f x ... \.'( ... ,\:p~{J} ,<v. "'r\ ":l.I2S/SS , I ~ >~~ fzhfl! \~ ",\1 \ \ ~ \ \ , ' , \ \{./.. ~ }"'>60 '~"L ';i , I ,t 1\ s '''Ji' -l.. ' J: x NiJf3 I \ I ~2;" ~ , " .r ", ff3S:: , -111105 : \. " <l' ! 1'\ j~r,c / I.,~ ~ ......-J. ..,~ \ - , . ' , ~ lXl"J"I. ......~~ ~~ A,i '+' 'x It \', )(/;.>t..(0 ~,'\,~ ,,~x \ \.o'f-- .- " ,." ........r~A.L 1 \ "t 'r' ) . ,1ft""> '( .-, , ) ~'l} '- l- f, I I"" ;: , II '\ , \x :? ~ I ''''' '-x', ;- '''- \:c ~ G{j '"' r jCI), '''\ ^ ~ \~, -', " t:JfJ63 ') ) ,/ J J , ,f; J \, I 1 \ 0 \ ~ , " " , o .:;- "J.?t!77 \, ~q \:IJ$!O } '" ~, '- '" \, , \ * f2':;9~;::. ....,#oo~ V ry/6J~ !.:} J , ).''r , -. ,0 ,\\l ---- / ", ,---:- 12~i8 \ i \1><0 , " ~"94 i \ 'I \~ I \\0 '- '-< ~ \ " " '- '~ .'" , I /l - " I / }~3J. I , " , "- \ \ . 4185 , "'0 00 \ '- I ...;;::. ....... ) f~ } / / ') > 00 " ..-' 4182 / 8 \ ) ~I J ;; fJ " (' / "\ -'< 1 '-' I " . " }". \ ~ .'\. ~f{6~ ./ "- / .' ,'9- \- \..1., ~/''i .J ) r' \ '17~1'5 ,- , ,0' ,\ " iP \\ 1;,.- f~ ;! ~ J~ i~ 5 j;'" L_ ;.-. 4 ^ '-- , \:. i 1121St / I l '-" " ., ---- 1f371 / I " \ '\ 'l i \ " '.\1 \ " ~ '61 I 42'30' _.' . '..'f..'.....'\!" '''W~, ,,"H .....1-",.."'''....1' '62 __ ...L _ .........~..."..;...:.."\i... ......_L 40' _........d."""_.&..._~ '66 , ~~-~"t :-........'......... 268000m L rO'o> 01' ..;" + "oP"1.., " Q "',,'" <'... t SCALE 124000 1 t 0 c-:::::::..::::.ti. --=- _cr..-:-_ ~-1..-::;:-==:L~_=~_ ,_:-="^==~.---_.~ EXPLANATION 1 MILE ~ Flood boundaries were estimated from: Regional stage-frequency relations. 1000 0 looo 2000 3000 4000 5000 6CXXi 7000 F ED a:...E.:I::E-.l=-""'" 1'=--............ _ ~~." - ~~-=.=-~-------, , 1 5 0 1 KIlOMETE.R E:3:: r::E;r~:-::I~.::.~.~::-"----------:-'_."-::::::J CONTOUR INTERVAL 40 FEET DAIU1l-\ I;;. 1.'[A1\; SEA lEVU This work was performed by the U.S. Geological Sur....ey fOT and funded by the Federal Insurance Admlnlstration, Department of HOUSing and Urban Development, to meet prOVISions of the NatIonal Flood Insurance Act of 1968. COLORADO . SILVERTON, COLO, SW /4 Sll YE.RION 1" QUADRANGLE N~745.Wl0737 5/7.5 Base by U.S. GeologIcal Survey 1955 QUADRANGLE lOCATION 1974 -.-