FLOOD06295

• County: Statewide
• Basin: Statewide
• Title: Index of Flood Maps Through 1973, Front Range Urban Corridor, Environmental Geologic & Hydrologic Studies: Map I-856-D
• Date: 1/1/1975
• Prepared By: USGS
• Floodplain - Doc Type: Drawing/Map

DEPARTMENT OF THE INTERIOR
UNITED STATES GEOLOGICAL SURVEY

:)30

I04"37'30n
40.00'

'O\~:I;'3~,,~~:~[ T 20y'" ';~'W now 15' ,.1'80~ '5t~'~':'5-t '81 '~:~).,~ 1ii~t' ,; jJ~:r:i't~./7 10"00' t'i:.~fn0 ~.W,,~~, ~? ~~i';2=H~:' ~ )!(. 'r "OOOO:\"~) ." '5' ():r':~W;~:'W.((A
,./ .....r ,."UCD" 11~~1.(;>';t (') :::">'.\1'1:1 "" ~...':.,_'\\ (' /'-.I~ f, .,i.;:1J..... ~'(i :.=- ..~.(-: Ii ,>",. I", )}Vo,&l)' s._;~)

.."...1'T':"'~!',~,,,,,(;:~<~,, MOU",":~=~ ~'" ~'a~ ~~5l~( :b~;i~ - rl" ~ ~~I!" ~ ~~,~r~ ~ '~~/~ .':iJ 0 1":' :,~ ,:~' ,!)~ ~;~:'~><:':" '~i ~\<~ \ ~~~.,# 1M, 'v ~~:.f
~!~J '\ ) \? ."'::""'''' ,--- -'" r I ,,' r" ~:~ ,~. r ~.. ry', 1\0. ,/ '- '. ~ i ; ~&"')lr--, ' ~ . ';,. ~l .\." '~(( /' -- _l ,. ";.. " '.1'':' If 1./ '\ ~'J:~/ .ff Ii S"

,.......1 B~,ld.,A 1\, <,; .~ 7 /1" l r:f....,l' !,:'~'~';JI J. t r M'~'~I,,;...II'>llll. ~~ 1.. ... f " ^ 5. t:'r;; --::;;,().. .........-.
.~, \ '\. () (. 'k"1 .", 1" .of' ='1+' '"
'.'4' ~~t,~.,.._ .. ,J f" --> ---- I --. \ ':' \. ,-. /.,J ^ I) or t-- i.;. -..
.......~ . ~I = ,;-r,~..' -I -- I I," . ....' I.... lot-. l~ 1
. "'1.,.\ q ",') r/,#'.,,~'j'i. 1,.'> ....:;:;j-,~ ''\'''.'~'::"" p, ~'5",,1 I' . ~ . t. """D~!i'"'" r--.
_ ~,~.., ,~< '- / 1\' ,. _;' - / ::~ :.:.~ . !I'r""" ,:;;,~ t" r", ", , "M,::~" ,...- '0 ",," .........~':! ,}; j~ i "AllIS" ( :<<) \ G' r~; ~ .....
. J V1J"V-- ' W: ,J' " _'., /;', ~ ~J _' ]./11"'" " ~';t~ Ii'> H ~,,};.~; ~: J I ;,,1' n'J":';'). ..\ \.:. ~~''\ i' -r'j :~; R.. (1111~.." : I/r-- /.t i\ _ '--. .....
FI,Jn.al.. "'b'll-../"l'..-J'/ -eJ'----..; I -- ~ ~ l"'. --.... I ~ :, ..................
;' '0'" ,,;~ r~"";'''''' / " _0/--""- J : ~ ~"" ~j-"~" ( /. 'y '\) ..._, ..,.....,. ""..../.~. ,... ...,,::~. ",}';?")J ~.,,_ ,""IIl~" A. I\\-'
"201-.",' ((~ ~ ....l ..,.~: (1- ~!le'l~.;.r 1 ___-l&'!..1.'..!'t_ _~--;L ~ ii:":" ( Q,. .~, " ..... l" 0':; ~. .N ,~ I
/-'-'......:. ":l -- iour..---~_ ~ ,)/ 119l> :0 I : l'I7~~ """:,;'; ; t" -~o?-,-, ~ 'Jlr 0 \' I (~ i~'" "'.. "', 011 "....... ee@ ~ D ., ...~ ~ '\: I:
1,,7 4 G /\ ",'I;,- ......-@I\l 1/ ~. I "'q~ ./' II.'::..., -__r_ ) ~ ......~~4 1.."'" '0". /I;~~, ~\ \':
liol .... l \ct"-,/ ~ J ( ?: 1\) / o,~ \,i1,~~ s...._ -----.--~ - ~.D~< j r^~UJ'~:" (:J\. J -''''''II,,~~?tl' " ' ,
\..) l6 31 u' ~".. / ,4fl "vn~/l)N We" ">)6 ://., 0 -:'- 6131

, . ,\" 'JI' M,"",.,o "'.,i'~ <:.... ,..I. ,,,,,,,,,,,,1< ",,~~~ ~ - ~ -I-~ ;~~"<" \6 ;4",J '~l" [ q:J" ' I 'r - .I~C" ." "'~~,').il. ,.. ..~. - - '
tn {"11.i'13r~ {.r ~ I~....( -\ _ -.(/ --- ..:.-.~::""~~ Dol 1'<1 --.. '.{~,~"o~t __ f\b.l. \::'11 .; ~J";~' L L-""i 0:1 .....~t"..../ ' trY "
')\U\c.,-{~(.,"," "'") ') ;J,/..~':' 'V"" r;.71/4,r_.::r--~"-,,,... "0:.:,, \\.{ "" .,...'~,('- _. ",' ,./L':/.:::,' '. .~ ,/ f-.....li......~
'-">A-~'- . .\:::~= - 0- "1''',yr~~;'''B!.-i~'"'I-;1,_,",,,_~!.'~il:f'''c- ........ .' " , .. '~'""';.,' .--, ' ~' .l. ~"~ '~"'\----'
"'B)OOr- ~'frP 0'.,,'0' M,"",,,O .c_, "",.,/ \ 1-:'lYL'2:~~/'I _ '''~7-a~........;?-''>.... -, ~~r\ :nR' >~'.i:- - ,,~.:=;, ~",: I'lJ(f: 4~C"'L1[~/12) , - ,,", ,.. ' .,
Ff.ET~'f)?( ... ('> CoaIC'ee~ ,{'a,.". ~IJ.-V ~~ J __ ~'.a -"'L__''f\- '1,->t~)o- ~ U~.... -c:""~.- r _)1 ~~ (It;t~1:/ ffi~o"~L?JfF. ~ I"
. ( Peak:l D ..z -...: _ 'v.~/ ---~'I-:..................... .. io\B .~-,;;:/.- ~." -~~ ~561J ~m (
5"'~:' ,.... MO~'~;'.'" ~:.",,"' c."'o.,;~' .':~:.ff' l::~~~'"?~:'dl~~ "~:;''1-~'J.s...... :~:':':".'l~'~O '~\ ,. -/ U.,., ~~' - 1~;~iJ; ~k: ~ --./~(~ " + f ^ K"-"'"
'M,i~'".. . ~- :. ,vs0f;.':>- - ~ 'T' d"i'. !( ,.f ~., - .". '. ).... T""~~ON t~~"'" ", 'J"~'J:'; ~;.<{r. ~~]'" ."""' ''),'7~.'' ' ..' ........0 l' '~"...~..'" ~... . I I _ _ '-
. -,,', ,"',,~, "", ; \\. ,n:::,i~ -(>i)~ /' .... v- ~"" ....."' D"'f' '. '< " ,;~./ o~- \ _.-
f'l---y.", ,'\ . /" t.. '\'_ ~ i M'" w~- ---. .... ~~" ";;'~:;':.:"H' ......::--~I ." T ...., .,".,_,,(
I ~ ~k '--_I ~ ,- "',,~) J'I.' - t;:i$~~ a.~,.-.LI'/1!~%:~___:PJ.~ (f'~h:L:L~I-' ~~ ..) '"\ , ( '\ - --- (
~' [~'-y'~~../'..........v'^l....-'C:L ....'\':-,"/../.,\ ':\~,"'(.'\~,.~" ~;;'~r;Ls~9;,~':"~~-1>~"" ~:.~ - "I"~'~'~ ~ "[DicR'I~l<.c'~, ~~'=".'" ~OOi-1
# I ~""';"'~"" ,,~1it ... \,. ~.!l':!'''' _1. _ \ Guld' .,.,~ J....d~n ~/e> I .."J...., T J_ \:~ !hl. ~ #'!'J ( ". O! It 0.',_= Y .~' (l T ,\ S "1 / " J
fj", n8~ .,It-. ul!es \ \~ ---f\';' """'7 -~ r. III ~I"" "-- L ~-...
123'3) e~80:n ~.e ') 'I ----\""""" /__ & ~ '.. lL)k\"Iln<' ~l ~ (' "1-
." , ,~'" /1'1. '~S:~"-"\ /""("J '~f.~ ,n;':!."I.~,~ ";: "':.<: ~~~ /~~1,";"F'; fIkc - (. I. \ i "" /( i \
s ~ ( .- \~ ..~ -ft 36131\ .-.. ~'--../ \ 1-;:.(4 ~~~I'iJ I'fl. . ~ --;; i -~.. 1 3t 31 ~ ______'J___~---- 3631 \:__~___ ".."

,'M'('O:.:, .......... "\~~':-__~::" ~~1"\>~~~~ ~ '~,,' c.-."~~I /Dl"l;rll \, 't. I:,: 1'\....\......\_,...1~
,_,,4 MtTom ,-'" 1l"11!lIO Iy , \ I r,~ 1'-1 " - .... ! 1'-11~ ~ ~M I~ '- ..... I \ ~ i ~
) -'<~._ ';" '''... ../ /"'-.1 \~ I.;::, ~' Ik IL'j,'" ,'''.~ "' , ,..;ow;) X' w.,,:';;>- ....r'1 1 ..,
~Y~"'i ;0"'..." "'-'I"" .;.!::~;,.{" ~ k 1"~(D:r:::- -::::; "'" "" \ ~== (\. \ ; /1\ V,.........
': \ 'V7 '. "'~7 /1"~'" ~,~"':.,..""""",,~ '''All; ~\\~' \ ........, "_~":. ~ ",~.I \1 ~,.,z
,,{)'i I ~ _.... (\87~1 /'. ....,_J'ir J.>.I;.. I~ 11.,".';..:,: wTo c:::> v ~." ~ III m:!<<n;}t ('{l ~ J - '- '...... " ....
--....... \.... : 0 ... './ ----- (' ...- ~i~~J,A '71\ V III 11111 . ... ~ -- 0,\ fJ I l, r,.....
'1 '.,...... , 1- 2k;..,,,,,_ , ~,~ !r+~ ::~ , j'1 -. '"
, '"". , ~ 0 ".. ' .' l "i'\ '0, ' . '. --..: ..' ~fu .J ,______,1
~j6i:'> ":t r\:'J~'I>-.., '0:, "_, ,< '1/ .~~ '''IR-Y ",~,' !'-, /j I ~~-.... ~ ~
'~' \ l>GuyH'II} "- ~,J. \._.......<1',/'.. t /' 1 pl.lJ-l_ J_ - ~~ III r.l '-.. ,/ ).,p~ \-....: : \

"'--', ", '.. ~2..'"" "'. I G.'~' l,__., , '..r- ~dl ~G.' , . . , .. " , I '. ".' ':,:,';:' r " '-~' :w.." '1>r ~jh\ ~ -\..l, _ r
..... /- <'., \ r.{'~ ~..- p"c"'1 'Q~f~. . "~('\"A,t I, .i/ ~~r~ I, " ~
-.....~~:::) ,) ,...', '_ _, ........ ___ \ - r AIRPOR ~: .t ~ t- __
'00000 /_,',' )~, -\ CoO""'. ,,'~ ~ P.cco,,"';~ : :
FlU , ~'i':6 g:'1.enn,..1 "-. _ .;;~ ;:...f-~ . VI. ~~ M..,"". '>60;' r II.. : 8M 552J "
45' r'" \ '\0 tiI( t ~ ~ 'W .~ r III c-m:---i"... - I 1ti-831
-.L.... _....r-- 1'" ~tEI( I ~' ,"r- (' J=~'~;:l';Tl .. ., '" ~~~_.... ~m' ..........sv-,...~- -
T35 / , I.- 0 'f. l> -,"-" .....~ II I 3 ~ JM,.""',/"
_r.1 f CLEARft~,U":"'"3 e."II' "J+i:(~jl~'C"'t'Io~~' 3631'- ....1 vc.....~~ II-l~ ~6~A().~~~~r(:,o If T4
',.,&.r "M":'..", 16 ''''04'", ,,,. I:I,II'I"~,,,., nTT1, ',':.',' ',".". 1....'~^,"II."",;,';::~j......I\"
I ~, ..._n>-_ ';, ...~. ". ~~1 ,_,S!!_ ' Mtn"....... L I "" ~ ~ i' II-II-J 'I (,/1\

," .,0' ~. '~< ~ '"1'.,,,' rm... I~:'" i '.'~:v ( , ~\ ~ ~ ~F-...'l.'... J '~~'-., !
('/;.r).s~~ .:>~ ~~ ~ '~:n-- __-... C> \ / r.. :;.' '-.I -~, ( ~~.... ~~\~ !
, ~ ">,.' ,l., ~ ~__" .,.. [ii 0.) ~' ;::=:s - (1'11 ,,~"" , " . 0.'~~" -{ l
"~:,'".. """" ,,,,,,\\ \m, 'O~ ~~/ "":"';:;':;:~:~" )/''0\ ~1\~.:.J '" . "''''',IIllI', L If _ \,:':,,:~. ~ \C~jl~\'~~,:' \\ ....l\\ ""
..,,, .\1" \' '0'0 0 ) , lIT . <"." ,\ .,1 ~ J\" "
L.~:J .,,, 1-;' .~, '"'''''I ".". ~/ .. .' ~t..r .. , \ ) ..,
~ i~~"''''--'':~~' -'" '0. I /~ ~ ',_ _ MlO \ rt.~1.... .,,::--......i;;-" ~~r . .....~ ~ ".7 ~ '\ ' ~~ ". ~ f: ~--,".,~.~_i \ . /f :~ \\ 1. ~";.. "-
_/~"',,,, -Ocr,\ . I.... " , .',~_:"") ""'"'--. _ ~ c.....,r1 ~ -1l.> \ .. ~ 1 _..~.!) M( ':,;.:t; ~ "'\.{ '<0 ..."-
\ _ ,,~. ".", ." \ 'i".:;,:L ' ", ~ ~ ~ ~ " ....... ~ 't...",.,. ". ~ "" ' l '", .... r'-.' : \ S; ';,
'- ':~..~ 0 '.\ R'E " ~ :, ;;;'1/~ 11; ..'- '-~'" 1," - ! .. -..:~ I. -J \ \ . JNi '.""\: .~: '~\ j ", ~~......~
,. :~~ "', ",-, ~ "" y M'm~o'_.. 0 I; \~o"""..... ;; \'0 '" (i2 , . 4ZL. " ..l"!I'f--, u__,.,ro ~ "'1, I
~ ~.:: ,. 0, ., (f ~ff); ~~'11<"'''\., ~~; Q <:::: -"--1'" '(J ~h~~/l~,,/Y 1 .... : \__:~\ "....'y- J \ .;
"lil --.........._ - (","" ..,..... t '~i~ ~'}~lr ,,~lI~,"''''~o1- .~t c, :-t ~ (;-.J>t ~;;; ofY?.. II.. ~..~'~~4,:,~:,b-! . ...~- \-~ ~'-;:. i ~_ I ~ ~ ~~O
s t..r ~ V16 a. 31 P"RK (16661 (i) ,II'- lurn '..... <-- .....r: ~' --'<' 6 ...t:-< ~I ~~2~' I 1ft \"--r:~-}--3_~:' Co"": I \ \' T"~"':: T
;,~J . < ~~', I -".I " :JO~('. ""'" ~,.. M' i'". " >> .'''''' "i'~~'~ ,. :~o"."., ) \, '.. 0 "~, '.'" . '/ '.;: .'
5 ~~;'n, ~ ...~ lis .;. ,", ,.1 \ l,. \ ~i",fl~,. ...c..<>n~'~ ,~U1w y_ ;r;1)-G: \~/~' /~~. \ I \'-.. "eL~t::J ~\ .......1
...-..'" -.;:J . , ,-, .ao',.~: . j i', ,- "G'~ 1,.1,' ~ >"::;Jt"LiI--l:: 1 1<<' '. '1 ),~' ",".", M.., .J,,' ) ~ \ ~ : ~",I: ri '
";'~:~'~"'" 'm,,'.', ""-,,,,:.o~,,~ ';:",:~:'.~ "..." '~-'J./~;;'!.)~''0-~~-~ r~.~"';.>T , t""r""~~~:i-,. '. "" "", ,. ." ., " ""'"',m"'.. '''~''''''. "''"'''',~ '~,;:::" 'z:." ':"''''} ~;;p; \a" )),,"',"
, fl)l'!lSf IrIlJepllnde .\ --...s.~....--.';;#' "- "-....::'$ .. :., = '. ~~JfJ.~.t.,~ f~;': -\~. ~i\ ~" :,}, I {~~!;.:"~f: ~ i:,b.t. JI \ \\ ... ~" / ,( 1 \
':.'-:;:1 ".. ,tll IndIan 1 '8':~--; .::!t, Subd.\l"'..../ '-- -~ . J;~;:'''''' ,>.....u ........-m'\.. "....,~ '\ ) 'C. f I 1 \ \ ( \
Mrff:' P,U/~ f ( "\ 1I11l~ J "n' Falcon ~$~ .. ~'~!1 0 .........~_I,~,. '0 ~J~, ... /,',' " I ~~... "..., ,,\ t:L ,7" [I '-- \ ~! \ I /\ "' 1 \ \ \
31'30" -...r-"'. ....,';;,~lln,'" _.~... ....... r~ \, ''''''$_ 1766 or' "-T'I?'. '\ ' J tt..~( HI-' t~'::-:\"~.J { .. ~L \ 1. I / \ \ \ / / I: 37'30"
'--"'_ eX.,,, - o~',:' - __ lfilt~, ~"-:'''''' ~_'_'~u i--~. _ ,~' ~'".''' (I L; f) ~),~ ~~.""" I..... \) I ' It:',"" ' ,/',
''"'OOOlf!.'..(_"rr---<~ :"''1\, ~ _~." ~~ X,~",""~ E.~"_ ",j:'. ^'-.~ ....-... ~ ,/:,1\ \, ~]r~- ""'\ \"h I """ffi~IV, " " (
,~ ";;'; """ ~T " , ..." ,.... ^' --"""- ,,,,,,,- , '-' J - '. --~" "\ \... .,'. ""1"1' \ S<looo
E..~ ~.r~ij~H~r'Y~'f.... Park _G~'/~ 10 ~ ;!o_~:" ."f (' \~f:0~ /..-~) :~~~"'1~~':'::..i __ ~ Grl'('n. -;1:/ ~):(~E!f:1 '""-o/j\(>~~\. c~........ r J -----\ \l~~.::.f~02~1 i 8~JF[ET
~.. ~":~B;'''' ).~~Iig{M r__ ~ , or ........ ~'~, ..~ ~_.... Mt Lindo / ../ ~ ": ~r WEsT "O",~I[$ 8'" 567'; ;J..' ,- '.oo ....... 1\ U 1.______ ,~ . ...-- ;'" '1 (\, / / l~__ III :LJ
,'J ~\ ~ . --~",-. c-' .", ' '- >.__,,,,,, . ::h ,1'......:., L.. -' \ .-;-,'~ F' ,'.--f' , ,."
Ob_ <>,,:1' ..~?~ \~~ \ ~tff, l Peak ; \ 4..jl...... . ~.y ~ ~~ 14! .J:.... ~ ", "....4 1:.1 Y ~". B"1~102 \ I !J I I j l. \
~ ........... ~',-,;l ~ CO",... ....!.~ 'u ~ ,. . ~!, '1' ";:;- $ ,\ "" CO" ... 1 o. , . i ,I : ( I )
\.~; ~S,.. ~,~ 't '1.>'-' / i...-' ~, ,'m' . , ~:':'!,.fJJ.::::: =, '~ - "'( '~. " ~':J ':,W"' ~/ ""0 \ c'7'''I. /: t \
I" r 1 C.n'....' h",hd ~""V' _ --.... ,....... ...t~ BM 6197 [J" frio /" ~','. ~,,,..-.:,..:~ - ". " tl ~! \. ?)'" '7 \., (; (\ .....-~":"~I - I: / ,,,/ ../ )
,,",l.~ ... (~,;o~,..",.." ~, \ _I...."" f' - ~8891 "- CDlo.Imt. ~- (~ '"
~;: ~~~f;- C_.; /.."n,k .. <1-'<' -.. \.. 1(-"":::' 7,--',<; ";\ _Y 81<f~~A"PI'k e ",~\) ~~ .A ( -: J '\ -+ \. { / -<...."'" ~) 1/-'" ../ ~ (
~ I l J v : _~ ~ I. 0" ~U v' / -0> ", \ . __- '" ."" '1'-"!l~' ...i?\ .~c:, ~.:::'~~" '. .:1....-.,. r 'I... /. ,"I" .f I; - '\ 1 l \ ,-- -~ (;" r--,"'T. ~ -,
+:-J' ) "- r.~"" \ \ / ) / Mi,-;ey..---<: .....------- P''''~ I I ~ . \ ....' 1 I ,.. 'I I "~'lo"
[;:H;\I..\lIU' t \'J' r < ',\- --- ~ oJ> i ~~~.~f.12...., ./ \ '.. \ '- \ r~ t '-;;q'" ','" '" ..\' [__Itl "'~"" N--' I \ f \ l r~ ,....--- /. .. t /"~"::: "8
USO ,........ .... 1 1J~ ..... ' ''j,' ( l'J '.... 4r ----. '-, I l J "'1 ..s- ~ ,/ I ," .. -
..\Tl0S.\I.;......, \1,":,...., (""-..!>"..n'I......\....' / " . ---"l Iiii' ~II ,...~<-.\(... "...;,.111""'" ~J. 1. I' , I~Jti;rl 1. ....~.tll '" T

:,;r:::l'f"f',,>--..;, :')~~I,,\~.;~)ft:.~~~~\>-- ~6:'r-~,\' o;....~,'-" :'~ '~M'~.~-"~";:':'~':!3'.~' /'". "'~\" II"'\.~ . \--?,r'~--t "~-.'\'-'-~~'~~~~\/">r.7~-1" ":~';;):rn-Id''''
J~ " \ r'" ...'(./. ~~8~:1 \ \\ _IJ ... rp......" .....G~~L-('- \ .... ~~', ...... ~r_:; ~ :~~:1I6o;.9> r.~~ .J-:'.','~:,........ < .)_ I) I" ,{ J"\',. \ / ........, I ~ J)' , i"
~' /'::-~\' /!_'--- /,i ~ ~B~;::: .";:~,:,, I '\ .~", ..~ .." \, '~-':'~:.' ~":'l. .... '."",~=- ~ .V" ",:';.':;;:,~ . ',,~., ,., , ,S, >~'~. '( ,..i-----L-, ~ :if.,' \ ))\ :;::,/ '1'.. ,~ - Ei\~ r i. .J.!..J
1/ _ f; I ~.>", I ) ',M'O ::\ - "'~ ((. >,':) i)...... ~ 'j;:'''' ,~... ~,. "',.' \ ..... "'''1,( ))1 ,i':--" ,\,:' j,",. , . ('I.//)j)1 \ ~ti""" ~~1 lJ{ A
.. ~ '''' I " 1""'.""" t:,,'~~"\ c' Y or," ;>~,. .., .:;1, .~;;:\ ,'\, , /\ i f t;''''',..,c., ' ,'.r! .' I--/{' ..::~. '.T(///r ~,"" \: r t,-."
'I ,/ ,dl 7,,,,<jYegge\ 51" ~';' " .' ..,' ,r ,. 0..... 10/, ;>. ~~. . - ---..J.. \... ..//' '-\~"'''' 'I ~- ... ~ ~ J---J" 1r:J .J.'II~- I
, .. \ ~''''r .<'/ '':; ( .~ ,..,,"-;;::.-'. -" 0 "r.\T': '<.'.' I' / f ~: ..., ',' 1 )' ,W', 'C.' ~~ v' ~ ... ...,( p;&__J \ .J'
"\",,,~~~,"" ,,-,'cr '",,,...~ t"" .)',- '0 ~:Y I : '. . '-.;0<.'0; , ) / 2:.':)' " /1' { -, ' / .....(/~pga.i> S'---- I \\ ( ./
. '______ '" ,I ~.m" ''v ~,mO"'". ' ~I () "',,,,K,~::rw"R""'Y' \ / "'...... l r(-" ; ~ '-", l: /" i ..% li-" I lit I I" \ ~'/.,.
..~ --iF ~,1-- ..... gh 1..:..A pf '\ r 1 ..s /' ~.. -- 'GulCh ,~~ \ h ...... f f 1I1i71 -tr ...J I)" J\. v~."a".', -
, _ '._;..- '~ . __, ' _ .....,";- \ . \, MO"O'''.1 ~ (,~. . '.'( / ~~, /~ ~ , \ '~(', )' \ ~" /" r I' -I' I ." '.7 ' , ,", ~""'- ___, U)
",..~... __ "_.~' ',~h"m /'.,_" -r..,! /" ....~,..'^"r'.,' ,,1'i2, ~..~' ., A_.... l'-- · ., IJ' "
c. ", ~~..,~. A ~,:;. __. t " " ., r-' "o'.u.. \ ;' '\',-" y - 'll'~' ...."..."./ -... \, ( i-~<__, '~.!?o{ '}S;-"c-, ~''''''''. .,'7' Ji' (, ~ ' "" e' ~-.Jj~ 'I" "'_: ..
,~ ~ ';i" ".. ^.,,",;_.;~..< JJ (~ I 't-;P ......" '"","\ w"w"" \".i !;,:~. ,) ,'~ "..i~~ . ,.r;:-:...,-.,:,-,. '~""""l' ci"'>-, '-_" "_j! J>(.J__. /"-,,- ( , 1 '~~IP"''"~---( ~ _e. i ) ~,
...... .. ~ ~.; ~ '... -, ,..' 'j' ~ "../ ~'l (""-' t ,- ".f I... ~"J,... t-." <\. / -.' \ 0 ." f J' ,\';" '! 1\" '0. --, J.
:- ~:J ""0,;)' ...... --' ,:.~_./ ( 'MOO IlM";'( ....., "- I . ),,;/ .." \, ." '\'>. / A../~_/-.....':,~./ > ",.,' , . ') A (7;:;:''''''' "nl""" "{~L~~"'__' ....).... 'i
/~ ""'''lO1''~)~':''''"' "..;f'~.J ,;..;:( '-'s.m,Jo ,,,, /',> 'If.'::.0 " <\ It ?f']' \ )'I::'S"~/ 'il:.Jj_,/;' "~\ ,~i J ....-..J \',i, ~...J \(":; .....~.... \ "'--);
O' ~(,-. c,...".Ji"i ~...~ 'm'l ~"t; t, \'=t=.~.. '->'!.~ I) 1" .,.;- ~ + -" ,~,'f. l/' ell + ,/ i /' .; ,J J ~'i ("I '../ r 'f 'Q." . ...... '\ \.' '0
N/j'J \ ....... J (ntch.lI I: "'onl =- ~ It--. ~~W.\ ........{f.. .__~"") .--~ -/./ ./.../ /' I ~! I f \ :.r 1 '\ ~-...:::: '::..;'1 , r.., ,/
':/ \ J _ , I J' Goat --. /1 ( _...# (-____-r. ..../"-__~..~I 8M ti12~-" ~~I ''''_\-- J ,) ..______.l.~-,- \ ;;- -.. \ ~~ ....J'" 8Joo16j(,'l >
. "0 I :- I \ l...._-.,.,.._ - '-"'_. A.,' ~,_ c Mtn ,~~~, .- '-""f'1 ' ~ I I 1 "]f'".-- G"lch~ 0"".... I / ( lI'H8! \ ..)
\ ' __ _ __ ," "" "-V7Je U I I ~ L _ _ } ..........\ I 192i ~ J 1 ~ -; ,10" '((t: "'- .... t \
l\......, ~ )1 .,.2. Fh'..., ~? \.., --:- ~'!t:r!,-;I ~~"'''''Ooct r '"'''''' ~"~ ~" ',,_... __... DANielS I ~.. 1, / / l,,- .../.......____....-:..\' I .- ~-lC;':,. I ( ) \ \ ~.!.::,rl
~&i. ~;,J \J \ _.."" P..k?" 1"'11 ( (.... ----\ ...5 --- G.'{.!eh~\> \1~:'l~~~S" \.: r- ......~:"'~M" ~ p. ~ "" ':>MJ ... / '_"" PARK i1":'''~~~I?006I)/ ... J~" ~ {.., . .J ./.. ,,___ 13 31 '~1 I ( '- '"j ~~
HEl ",,,.. ~. ,,.. ~ "I .... 3631 .\ -/ '''- "'~.:'.:'"../'.'~I"",,:~~., '''~';'-' /, J,'};I':~~/'",~'i~fTtI..-<< ..,I'ffC"~l----"-'--;':' ,...~___, :':'~O;7~~~JI'" (' - ,.ill ""
,~""' ,; J ~",' .j; \ I" \ .~~4- ' , 'M':i"'~~' 0" 1'"""';' r " " -ff" ". - i" ",w~" Hh"",.(UW' r. / ~I ':K' "::;/ ~ ... 1"..-'" '"

, " ,,,"',: J"~'~" ",,~~~?~l~~"~:~,"''''''..J'V"'!''c 'M,,,:',,\,,,,,)"':"::l ~7^~~;~ f I: ~1 I .)~ ,I' //)-'[/!,~,._~ -~ ":-.:,,' I ;\..., --/ ,,\ (\'f' J.'-)T r" rt ~~r\\ '"'0 "-\) y) t \

)'. ,J '-.,,:-' i'f:_ 'I ""''' :; \ t- ~.J I" ( ')' / j 'J \' ":11. '!(~ ",~;/"'J ) r ..." \,~ { r T'.: :r 7"Ec:1',~<- c',," ''-'\ ./<', (, \ ll:1,'.""
_,!' '.. '-'.. I \,~. ~ L.. I \1......../ (I)' ~_J ......)77'~' \ ""0" -{ t, / '~~ .....'''- ",",,,' i \ r /-".
~ 'l -.. ". ."'- ( . l .-, "'1:,' ...... ' ~ I' C"""" "". .-'. Y '~ ._ a, . ~ I , ;) ~ (. ,
-.. ~ ''\; ~;I. '-" \ ~ -!... ~ - -[' )\ :/,.. ,V" ,,:,.~,,) J@_,_jM'MO"O'''"l ,".. /i/~-""" .0$'" /J ,";'--"'!' ( ..' ~") " ,---:-- __uI I' S--': '
f:> E\kl',..'f'~ ~;\~_..,,_...- ~ j~ -~- .~~~' I {.s-1"''-.tlt1l .,,'" Tu'~s.he.d. 1""( ~;.~ ".J.'L"~I-J.r;~7~- !In. _...) !&~~ /J h.... . ,I \ )' /~ '\'A"~-~::-- ""~ .>):-} ( ~... ........~, /-- / JI J J
.0. (.'~~", J I i~______(, V" ....".0.............. I oJ' 1 \ l~ .0" ,,"! ~ ~,.,ha.J> ,.-(.Y-,~ 1>)' '.. I ~:;/ I \,.-" f/' 51" -""; I \ o'
,"~ -,' j "..:c,., , ", ~ ~ "" ';<~... ,0. : ,"" .( Cl,..J....r ~ F ,.J lI' "'0'-.... ,~~,::" , .,/,':' ~ (-V ,~r, (' ~ =t:~~, .,,z "~;" "

'" '\ j~:~,,..,~:;:; ;'i~r:' (, c",:.:, '~ 'i;'~':"~ 11",..~.'-'+~? - ----- .....~- >~~~"' .~~.ll ('%.~~} // ;/:JI l,~'~~:" ~'" ~ lr;~~:~~~:,;f" ~!;:~A; ~~'/:l' ,~J~~j /~'~~) ~~~, ~~.< -1( ..- L:~?!,.,j.~~;/

('-1 / B~nn~' - sP\"..e~ ~'\ f.t - 1 I ,1'1\\ .J ~ t~ \ .~~--, ~:,. ~ / (.p, -- ~ ~.., l~~~ il'.:~~tA -':,- / ~ /&~t> \ ~ ..._~~r\y'o~ \ < ~~,~ IJ \,1 1 "Y}4r-- .-
Peak, ~ ~ -{:> l.(lnKv"", ~,('lU~{~ "'=:~...; ",,",,, J'" .'l~ / ""a 't. I f' - t "-
) / \.\. ) /,.",..... ""-'\ ) \ 10\ I~)' \0.,....,. .."'" .r" ,-'~,'i~--' ,,-\--~,"- .--.. _~ f' /~/ \ '- , .,,., \ \'y.' "'~I ,;., '-
, ~ '"" c. I - '\ ""." ~;;~; 'f /.: '" I _,:" \, \", I \ \ '\ ,:" / ~1/ ~ -"C!'j,:,:,~" '~~~~~~~~~\. , ./ ~.. \ ,,' \ ~.~ ^. '- ~'J /; ~~ ""~---.;~'" ~ ,,~. tf.;o:, ~ _~:o ,"+..
12.+-r ""~1l~:~:' _J_.~.\ -"j-J )-v::~J...., _....J~.l '\ \~" ^l~ \. I >.,;' I ,_';. ~--- ,rk, Ii \'-...=~ ~ -____ "v..:..y! ___-.-::.. _ -.......\-I\~- t<;"....'----::--:-'ill~ .....\",.-
" !' ,- / ,o\,~ 'r, -,r ,,,.." ,.--., ".~~ I I~'~ ,r-' 1 / . \, l' \ ........-<....? ' -.... L ~ -
~ rf I \ "'1,;:;1_' >-::;,~.ltlW""'" ~lioPeak8 31 o.J.."'", ( \;., 3~ 31,.....1'" II' ..." ) "'T7~"""'V--::'::':::'/\)' ~6]1 '....5 -\ ~ /~ J 8M 3 36 3~ Z /" ---:-i... ';"c-;.:--~ 361~':-~-- _ 81:,::, ..../~_ ,/ T
'~ " \ ....' 36.;j),/' '\ \ _~"",,,,"",,' "<- ( ~~--. 'y".,",_"../ / T6;_.....;;;\/"' ':'1 ',' ./ '\,< ( " ',,)).. '6 "';)~ ".{ ''""' ~ ..:'.~. f'KiCil\" ';;r~~r .:Y?" ~~~-;.,
, !'? ~:""t( E 'l.'-~""'"'' \' ,,;~,~' '";;r:' '/ ": :-'~)~l E'~/ , L, .;"s,.., p:::' i ,.,,, ".,.o~ (~(','- ~.~) J'~ ~'J'~'''" )~= I' Jt I' \"k. c,:}~:;..." ...} _ ~:.;t';.,,'''' /,--t ~~'V ~I,n"~-.:} 1\\T' I t 'i 3
~ ) ,..),~, i1....~-. o~..'$R,__~;}t~l~ 8 '\ '0:;,./ \ ........... ~ :: ..... ~'/r;, I", ~,~ '- t.. c~... (2183) I. ..... ...... I' __ _~ ' "t-", ---;:7 ~~... , ._-~~ '.) ._"""'" r I ~ --). ------.. 9.22'30~
'9'2~~r22 30 '10 "0'"'000 'EO "... ,. W 15' . '80 . 2100000 'EO 7'30"", '" W ~, ". W SC". "'00~05,OO'2IS<l000 'EO ",ow ''lI' ",. ." "'30" ",. '11'" W '''00''':i,:::,;:;:~,.",,~5;0~.:'';;::'. v~ "';" R6' :XPI.ANATION .,....[ 10,'''''0''

.....-- flOs~~:;~:e ~~;~ ~~o;~:~~c~~~:~eam hased on

'"/1

"
>

f ; .""
L\
1 \
.)~. "

( I' '"
j J fEE
I \ ~~~It "II
/ \
I

f-;-

.....
.....

",

t :'HI
!

I

r/

)
1

I~. ''lI'
./)i ..
" .,
/r~~
)
../ 700 000
FEET

:..-- ,....'
: -
,
,

..--
(

I
I
I
I

8;Jse compiled by U.S. Geologi~l Survey in 1972
rrom 1:24.000 qL1.ildrangles dated 1965-1966. Limited
revIsion from aerial pholOgraphslaken 1971
10,ooo-fool grid ba\ed on Colorado coordmale 1iystem,
centulzone
I fJOO-metre Universal Transvene Mercator grid ticks,
lone 13,showninblue

i~'~
'5 !
~ i

0tC"~'_,,,,

. .~"'~.~ Flood-prone area along principal stream ~ased on
:\{~:::~';"''''';'' studies by privale finns for Urban Dramage and
Flood Control District

"

1 .5 0

5KILOMETRES

~ Flood-prone aTea along principal stream based on
~ study by U.S. Army Corps of Engmeers

DATUM IS MEAN SEA LEVEL

MAP SHOWING FLOOD-PRONE AREAS, GREATER DENVER AREA, FRONT RANGE URBAN CORRIDOR, COLORADO
By
Jerald F. McCain and W. R. Hotchkiss
1975

Flood-prone area delineated on 7~-minute topograph-
ic quadrangle-width not shown because of small
map scale

Flood-prone area not delineated on 7~-minule topo-
graphiC quadrangle because of narrow canyon
reach

.....

7232

MISCELLANEOUS INVESTIGATIONS SERIES
GREATER DENVER AREA. COLO.
MAP 1-856-D

DISCUSSION

"2~

The rapid growth of population in the Front Range Urban Corridor of Colorado is causing intense
competition for avadable land resources. One form of competition posing serious problcms is indiscrim-
inale d~velopment on flood plains along creeks and rivers. Flood plains are natural fealures of the land-
scape developed by streams to carry waler in excess of channel capacity. Although not used as oflen by
the stream, flood plains are as mueh a paft of Ihe stream sY1item as is the channel. \\-'henever man COTT\-
pele1i wnh lhis natural function of the flood plain he muu inevitably pay the price through property
damage and varying degrees of human suffering. Flood damages in the United States have been estimated
to average about $1 bll!lon annually (American Public Works ASSOCIation, 1966). This tremendous waste
of national resources is borne not only by those citizens in direct contact with floods but aim to a lessel
degree by all citizens through m~Tea'Cd cost of pubJrc services. Thus. !loods are of concern to the enure
community. and solutions to existing or potential problems should be a community effort.
Hood.plain inundation can be regarded as a temporary U\e of the land by a stream; therefore, effec-
tive management of flood plains is an integral objective of good urban planning. Common procedures of
flood.plain management are land-use regulation, flood-control faeilities, and floodilroofing of buildmgs.
A combination of these procedures may alleviate or minim ill' flood damage m many flood'prone areas.
but for othe" a single prO<.~dure may suffice. Re!:ilrdle5s of the procedure u!;tld. flood-plain management
in an urbanizing area isaoomplex but neces.sary endeavor requiring adequate and current idenulication
of areas subject to flooding.
Thb map depiClS a broad-scale view of flood.prone areas along principal streams in the Greater
Denver are-" of the ulban corridor. Because of its small scale, Ihe map is pnmarily an mdex to more de-
tailed sourees of flood.plain information. Planners, designers, and developers should consult the reference
material for detailed flood IIIformatmn III their particular area of interest. This map is presented as an aid
to those authorities III whom the resJ1'Ons,bility for flood-plain zoning and regulation is vested.
Flood-prone areas identified on this map are subject to lllll11dation by the lOO-ye.ar flood-a 1100d
having a I-percent chance of being equaled or exceeded in any given year. The magnitude and deplh of
this reference flood were derived for streams in the stuoly alea from sueamf10w records and reports of
the U.S. Geological Survey. report1i of the U.S. Army Corps of Engineen, and from reporlS prepared by
various consulling engineering firms for the Urban Drainage and "lood Control DlsUlct.
Reports of the Geological Survey include a senes of 1Y.t-mmule topographle quadrangles showing areas
along principal streams that are subject to inundation by the loo.year flood. Theoc maps were prepared
under a project with the Federal Insurance Administration of the U.S. Deparrment of Housing and Urban
Development to meet provisions of the National ..lood Insurance Act of 1968. These reconnaiSMnce-
Iype maps are prepared from information available in omce files and in previously published reports. Up-
on eompletion, the!;tl maps are published and are available for distribution to the public. The U.S. Army
Corps of Engineers reports contain detaIled flood.plain information for selected streams, including maps
of inundated areas. flood and streambed proliles, and slream cross sections. Flood-plam information for
the South Platte River downstream from Chatlield Reservoir is based on conditions existing before con.
struction. Future studles of this reach may result in modified flood.prone area boundaries. The reports
prepared for the Urban Dramage and Hood Control District contain detailed drainageway planning for
selecled streams throughout the Denver metropolitan area. These reporls show the IOO.year flood limits
for bOlh e'lrsting and projected future conditions of bas1ll devdopmenl. Current status of 1l00d.plam
studies for lhe study area is indiCllted in Ihe diagram near the lower right corner of this map. The studies
are referen,-ed elsewhere m thIs report.
The flood mformation uulized for thiS $lud)' I't'prescnt1i unobstructed conditions ofelO.isttng channds
and drJlna~e structures. Alteration of the exiMmg condUiollS by man Of by debns accumulation can
change Ihe flood boundaries and CilUse d.lmage to adjacent properlY. Also, the magnitude and deplh of
the referenee Hood are subj<<t 10 change as the upstream parts of a buin are converted to more intenSive
land uses: lhelefore, fulure basrn development should be eonsidered in flood.plain mana~ement studies.
F100dilrDne areas are shown on Ihe map as hlue pattern along the prindpal slrC<:lms. The areas based
on U.S. Geological Survey studies are shown as dark.blue pattern. those based on U.S. Army Corps of
Enginet:rs studies are shown as medium.blue pattern, and IhOseslUdlC:s prepared fvr the Urllan Drainage
and Flood Control District are shown as light-blue pattern. The limilS of indiVidual sludies overlap rn
'IOme.instances; thus. the user should consult the referenced materi:I1 to determllle lhe aVJllabllny of l100d
infonnatiun in Ihese areas. Because of the small map '!.Cale, areu subJecI to l100drng alon~ some streams
could not be shown. A solid blue hne along a nream indicates that more detailed flood information IS
available m referenced reports.
Streams in the western pari of the study area are conlined to narrow canyons that have sleep stream-
bed slopes. Limits of flood-prone areas along these streams roughly coineide with the channel banks ex.
cept in areas upstream from bridges or other eonstrictions rn the channel. M3ny oflhese struetures would
be ovenopped by the lOO-year flood, and the depth of floodlllg upmeam would be slightly higher than
the muimum height of Ihe structures. Depths of the lOG-year flood along the unobstrueted eanyon
reaches would average above 6 feet 11.8 metre) above the streambed based on an analysis of streamflow
reeords.t 19 gaging stations in the area. The lOO-year flood depths generally range from 3 feet (0.9
metre) for a lO~uare-mile (26--square-kilometre) buin 10 9 feet (2.7metres)for a I,OOO-S(\uare-mlle
(2,590-sqll3re.kilomelle) basin. Although flood depths are genelally shallow, SHeam velociues would be
fast and could damage struclures dose to the stream banks. Streams along the canyon reaches for which
the above information applies are shown by dashed blue hnes on the map.
In addition to Ih~ areas subje..-tto inundation along prindpal streams, other areas are also subject 10
periodic flooding. These areas include numerous ravines thilt expenence shallow flows during extraordi-
nary runoff events and many flat,low-lying areas where water is ponded durll\g periods ofuinfall or
snowmelt. Also, during flood periods, debris may accumulate upstream from drainage structures causing
a reduction in flow capacity of the waterway. Such debris can cause increased upstream llood depths
and extremely swift velocities near the streambed. In extreme cases. drainage struetures can be severly
damaged or denroyed. Another destructive procc1l.s that commonly aecompanies rare floods in mass
wastage, such as land1ilidmg and mudflow along steeply s10pmg lerrain. TheM' procesM's are often nig-
gered by exces.sive welling of the ground and by scour of stabihzlI\g material from the base of slopes.
The report by Hansen (197]) descnbes scour and mass waslage processes during the May 1973 flood in
the Denver metTopolitan area. Identification of areas where the above-descnbed flood-related proc('sses
oceur is beyond the ~ope of this report. Nonetheless, a detailed analysis of each process should be an
inlegral part of any plans for extensive development of the land resources of the arca.

52'30"

45'

SELECTED REFERENCES

Americ-"n Public Works A~ation, 1966, Urban draInage practices, procedures, and needs: Chicago,
Ill., Am. Public Works Assoc. Research Found. Special RepL No. 31.
Ducret, G. L, Jr., and !lansen, W. R.,1973,Storm of May S--6.1973,in Ihe Denver metro area, frequen-
cy and effeet: Denver, Colo., Urban Dramage and Flood Control District, 20 p., 2 appx., 6 figs.
Ducret, G. L, Jr" and Hodges, H. E.. 1912. Ramfall'runoff data from small watersheds in Colorado, June
1968 Ihrough September 1911: Colurado Watu Conservallon Board, Water-Resouree~ lI.a~ic-Data
Release 21,301 p.
I'ollansbee, Robert. and Sawyer, L. R., 1948, Floods in Colorado: U.S. Geol. Survey Waler-Supply Paper
997,151p.
Hampton. E. R., 1914. Map showing availability of hydrologic data pubhshed by the U.S. "~nvironmental
Data Serviee, ,"d by the U.S. Geological Survey and cooperating agencics, Greatel Denver area, Front
Range Urban Corridor, Colorado: U.S. Geo!. Survey ~isc.lnv. Series Map l~flS6~C [In press..]
Hansen. W. R.. 1973, Effects of Ihe May 5-6. 1973 storm in the Greater Denver area, Colorado: U.S.
Geol. Survey Circ. 689, 20 p., 19lig~.
Matthal, II. F., 1968. Magnllude and frequency of floods in the United States; Part 6-8. Missouri River
baslII below SIOUX City, Iowa: U.S. Geol. Survey Waler-Supply Paper 1680,491 p" IS figs.. I pl.
_1969. Flood~ of June 196" In South Platte RIver baSin, Colorado: U.S. Geol. Survey Water-
Supply Paper 1850-8, b4 p.. 34 ligs., 4 pis
U.S. Army Corps of Enginlrer~, 196].l"1ood plain information, v. I. summary report. South Platte River,
Waterton to Brlghlon.Colorado: U.S. Army Corp~ Eng15., Omaha. Netlr., II p.," figs. IS pis.
_1966, "loud plain inforllUlion. v.lll.summary report, Bc"r and Clear ('reeks, South P1alle
River Basin: U.S. Army Corps ,,:nttrs., Omaha., Nebr., 14 1'.. S figs., 1 pIs.
_1968, Hood plain information, Rig Dr)' Creek, LIttle Dry Crcek IArapahoe County), Green.
wood Gulch, Weir Gulch, LoIkewood Gulch, South LoIkewood Gulch, M"-/ntyrc Gulch, lillIe Dry
Creek (Adams County), Grange Hall Creek., v. IV. Denver Metropolnan Region. Colorado: U.S. Army
Corps Engn., Omana. Nebr.. 62 1'., 12 ligs. 32 pis.
_1969. Flood plain information, Boulder Creek and South Boulder Creek, v. II Boulder Melro-
polilan Region. Colorado: U.S. Army Corps fngn., Omaha, Nebr., 34 p., 6ligs., I] pl~.
_1970, Flood plain infOlm;ttion, Ralston Creek, Leyden Creek. Van Bibber Creek, Lena Gulch,
Sandl:uon Gulch, and NOl1h Sanderson Gulch, v. V, Denver Mellopolilan Region. Colorado: U.S.
Army Corps Engrs..68 p.,11 figs., 35 pis.
_19718, Special flood hazard report to revise flood plain information metropolitan region Den-
ver. Colorado, v. II, Sand, Toll Gate. and Lower Cherry Creek!. South Platte River Basin: U.S. Army
Corps Engrs., 21 1'.. 8 figs., 1 pIs.
_1911b, ..100d plain Information. Rear Creek and Mt. Vernon Creek. Mormon, Colorado:
U.S. Army Corps Engrs., Omaha. Nebr., 27 p., 5 ligs., 9 pis.
U.S. Army Corps of Engineers, 1971c, ..100d plammformation, Goldsmith Gulch, Dulch Creek, Lilley
Gulch, and Coon Creek, v. VI, Denver Mellopolltan Re~on, ('olorado: U.S. Army Corps I:::ngrs..
Omaha. Nebr., SO p.,11 figs., 21 pis.
_1972. Spedallloud hazard Intormallon reporl. Ileal Creel.:. ()cnver Mellopuhlan Alea: U.s
Army ('urps Fn~rs.,Omaha, Nebr.. 17 p., 4 figs., 10 pis.
_1973, Spedal tloud hazard mformalion repon, Upper Toll Gale Creek and tributaries. Aurora.
Colorado' U.S. Army Corps ~ngrs., 3] p.. II figs.. 11 pis.
U.S. Geological Survey. 1913. ~fap of flood.prone area ICulOladol: U.$. Geol. Survey open-file maps.
Box Uder S..-hool quadrangle, Adams County; Brighton qUadr,ln~le. Adams County; Caslle Rock
North quadrangle, Douglas Counly: Coal Creek quadrangle, Adam~ and Arapahoe Counties: Comfer
quadrangle. Jdferson CuulllY: I:::ldorado Springs quadrangle, Boulder and Jefferson Counties; Ever.
green quadrangle, Jefferllon CoulllY; Indian Ihlls quadrangle, Jefferson County; Lafayelle quadrangle.
Adams. Boulder and Jefferson Counue'l; !.oUlsvllle quadrangle, Boulder and Jefferson Coun/les; ~hle
High LoIkes quadrangle, Boulder and Jefferson CountIes; P-.1rker quadrangle, Arapahoe and Douglas
Counties; Piner Creek. quadrangle, Arapahe>e and [X,uglas Counties; Ralston BUlles quadrangle. Jeffer-
son Countie~; Sable quadrangle, Adams County; Seuaha quadrangle, Dou~Jas County.
Urban Oraina{::e and Flood Control {>i'itm.t. 1972, Major drainage way planning, Sanderson Gulch and
Weir Gulch; Denver. Colo" ha~ier and Gingery. Ine.
_1973. Master plan, major drainaJeway planning, Big Ory Cr..ek (Adams-Jefferwn Counlles).
v. 1,2 Denver, Colo. Wright.Md..;lughlin Engineers.
_1973, Malor dralnageway planning. SOUlh Boulder Creek, v. I. 2 Denver, Colo., R. W. Bed
anu Associate$.
_1974, MJjor dralnageway planning. Little Dry Creek. v. I, 2 Denver,Colo., Mc("all.EllinI;S"n
and Morrill,llIc.
_1974, Water and drainage at Niver Creek, phase B report; Denver, Colo. Englneenng Consull-
~nu, Inc.

10~'22'JO"
40"00'

1'30" lOS'III' 62"30"

45' 104'J1':lO~

.~ A.lJ'" A (''-,'' :r.~~'- ~~'-.. '1'
/l~ ~:tc ,,~
"!' c "D "D ,,'
A ..{ :.t~~' C.,.r C .- . ../
d /D .t~" .f.}~ .".$.#
./.1 " .~ D I'D R
b" IY ~;~~ ~1'" ~9" A.J:~
" I'D . D . D c:./
1. Ai',' D.. c j{. A.!.'}~ ~~'"
~+'O S:' #0 :j' I'
, :1 D . ..,t. 0{
#. h h .t~
I' " ,l..~ "

52"30

"

39"22')((

DIAGRAM SHOWING STATUS OF FLOOD-PRONE AREA MAPS AND FLOOD
INFORMATION REPORTS FOR TilE STUDY AREA

Flood.prone areas are mapped on the U.S. Geological Survey 7Y.t minute quadrangles
indicated above.
A. Map of flood~pmne area pubhshed by U.S. GeologiCilI Survey in 1973.
B. Hood.prone areas not delineated because of large map cuntour intervals and
locations ofslreams in narrow canyon reache1i.
C. Major drainageway planning report pubhshed by Urban Drainage and Hood
Conlrol District (1912,1913, 1974) available for selecled stream. on map.
D. ..'ood plam mformation report by U.s. Army Corps of Engineen available for
sele<ted SlTeamson map.

MAP SHOWING AREA OF FRONT RANGE URBAN CORRIDOR

FO'UI.byU.S.G~IOlIIC.ISu'v.V
O.nv.,. Colo. 80225.nd Ruton. V. 22092, prlc. .Hi c.nt.