FLOOD06025

• County: Boulder
• Community: Louisville
• Stream Name: Coal Creek, Rock Creek
• Basin: South Platte
• Title: Major Drainageway Planning
• Date: 11/1/1982
• Prepared For: Boulder County
• Prepared By: WRC Engineering, Inc.
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

MATCH LINE DRAWING 9

r:~-~<2 ,v~ '~Dffi'-0H ~jD //~(i,',~"Y..~,/~:,.1 :~~:~,.,~-',(I,'I~.~.-,'J~~:I=/li!~ ' ~~i 1~~;FYi~1t~tCP LJU~ kr
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'g 4"WATEft= '"'-~ ~ 1 ..:....t " =- iZ' !;;ANITARY I
iCJ liCr:::rd r::J .d'l.l ~L\ (I,!c) '~( /1.,':11"" 'I~'I~C L ~~~ICJ[l '.',~ 4
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OJ] ~ .i1, rJ." '1 "Proptjiifflmt'f[(:Z!yp) ,'c='J, "C:J' --' -11-->- ~\. ~ ~ G,' , (CAPAC~"~
~ ~ ~~ (-, I~ :,': ~J, ~Cl',' ~:'r---l. r'~lcJJ D~"':::_JICI~ z :5=c,'I~ l , TO~ .
-I 0 :ArflPf?stJd P ~Ll '!'I;r[....J r=8ro' , ~p " I \---' I.L 1<1 < L<( _ 1'- '~fO -
0.0 ,'.~tt1J4810" ,1.+-,. '. ,01-' t:l. :Ji' '----....5.,'...'. '32.+20:t04..8..,.dell,'J, ,,' -, ,--t. ,-I., ,1<' I" IJr I I '. ",,1\ IN,E F2-''I'EA.'
,I' I[) 0 I, ID 10 P ,0 r'h> 1':-) I~IU ' ,k::_'_-l ,~! [?,'8 0 ,0; "' (Cl Q ~ LJ,', DC] ~l:~1 ~ ,LI ~r:l u 'J~"d,-"~>-//- --",;

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UO;' ~II-~J! S~:, ,C,~ ~C,f:' :c:Jc,n::Jr:::;llzr,lr..J Cl :r~ =C::J,I ,[J,jF4roposedrJ;IJo/~ryP'.J-:- I~ f
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J . ...--~';: CJ, Cl" j J, r, 'I ,'-'"' LJI I.\,D ! L_ ~~ \% 1'7 \~ i Proposed hiidW@,,!~~
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, " j W; l' '----I'" ~~ -",.0 [J 'I L'I '--' :::J ", c,:,~ ',-.,:10 ,foaEi INfO FL()Ol1 "L' til \\\
PROPOSED $-YSTE:MCAPACfTY ""'~~7\'" CJ I Cl,', ',1/ ~--=:; I' {~J 'D~ DO, ,If nl_1 ~ ~rA~'~,.,_"ESS---F\,2,Y~A~ '\.J~: ~'I"'\
f."D....'..'...',., .'tlf.,~NoCiJf.&rl,"~Ji~rilbra~s'NJ, 5 and C' ~U D l_..J "", ,-~ \' r1 n! \,\
DRAINAGEWAY A~2-" ,~, / 0\ ',!~ Dui&,,/~e.J:k. 'F;low~ll..i!iJ Duwlna ~36 -. I__J f I,j \,--:,-=-j~ '?:,~,:::,.:? ,-II' \
510. 0+90/'0 19~60 ' cfs' IQO Yr, ~-" '} - for ,ifehl1s. 1'YP,i"-.'lTfll-"!I!~I~~I'I~~,on)-strowrr::..., - , '4""' '
Sto.19,;1-60 10 32+20 ch '2 Yr. I " phn.,;a~_paol:ffi,J~.iil?j)r du~~"ft'.---, :;" ".: "\'~;_: "[y- , ,I
Sto.311:+20 10 48+80 de 2 Yr. ';. A st,\ltioning is 'alD,~'~ 'pt:op4Q"~ "sli~r~,'Of ' I '\_~ ' _(:; '--~, I \, \
Sto. 48.+80 to 56+0 ch 2 Yr. t OUtf 11 's I, ~ ~ 1.__ >l, C~J ~j \
Sto. 56i,;00 10 63+9 55 eh 2 Yr.,: ), e rl: yste... ,-' ',"- - ---~-"-- --, i [;JI ~./' 1 \, _ <-"--' ' I Y.\: "-
. :J, \0'3,;J .s drawillg ih-l pout..r planning sh....t repru- . l -, CJO II \\"\\'\'" ~
DRAINAG~WAY B I ',L e tillllPrelindnary land conc..ptual ..ngin~~rinll' n 'f! ill i"" LJI~]L.,: C')
Sto 0+00['0 10 430: ch 10,0 Yr. ' , Ai rnstiv.s to t~ OUtfall System concept wi<tl,41,., i, I '-------' " ,::.::~.; " ,.0_
5t0.-24+10 , 361"3,0 .~5 cis 2 Yr '~ naide~d bfJ,'the City prov~d..d the slterna- -' /~'
/ tive, is 0 e ual ,hyduulic/apa<:ity, in<:l"~e.s 1'-1 [] (:] o,'~", ft\c.~ "'~'~:..:::) ,-'
DRAINAGEW C ,,' ad~'lu ti' ,aC1 itie. for flO'if int..rc..ptiOll~ :and'"~' r- I ,~". '- "
.to,O'OO , 8;60 260 "I 100 y,- ~ ,., ,,,"im,"'. of '-". ",' of """"".\><- [j'[,!snl~ 19"iR<~. i', ~', r C, 't. D ' , \ ", "
Sta.8+60 to 14+70 40 cfs 2 Yr.* ,~0c'*'S~onl ,O~..inage Design and technical Crit~ri~''''n n I ~I {STOflMIS~~ U c;:J t-: r "-- "-
'/ _ ' ~' Thu drlw,ing shall riot be ..sed for constructlon ,-,,~ , ....~, -nL J (- --='1 ~ ~\ "J ' '\ ~
"(""_ _~,"--/ 'D.5RAtR"I,N9A.GO~~Wj!'C-1 ./ I PUtPos"tl.' .':, ,~ll 111-1/ ~ ,J~I ';0\ \ II \ ,-~"'>",
.I" u v v 30+29, 1'70 c1~,.""-IO Yr.* ~ iU I ' I"
',. . LJ,II I, ,--. c/(] C7 c:1]Jrl .\,0.,.,..30 "I'>
:*,.-E~i~ting",Sy~'em copotiy I ' L-j >~""
'-" ( ,_' (,' 'i [J, ~I ',3 e==--=-~~-=- ---==-==--=." "/'
" \ ..!.,..d. 0 ~.' ,I'-.J.!"' (1- ,----;;-~ - '- - .... \ \ v r-J ;1'
Proposed detentIOn ponds \",- 't;r~,T .' Jf1 I r I Q~ f) D oC [] \,~ :,', f) ~~!
\ l~ ' r-, ".fJ-' ~ILJ ~:.J c ,l \1 ".1.\\,,~,~ 'I '.._...-EXISTtNG~,.'''R
--;_ (~.~ i~Ur\JL> ,I ~- l--.JL :;'''-:1 ~ ~JGa h5h\\';~r~7:~U~:+i~.WER +1Q_--=,-_
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\\ //- [J (,'ese,', "',.'1 'O~~~\

"----- i y",' n'--J 1', "':1\,\ \,:,\'\'\
I " \\. '
,.",./1 : Provide focol,interceptors,and inlets for fUIUre,d,eVefOPmen'~ Proposed headwa(r _-Proposed 40 LF.
,,--' "rl and wi"gwolls------- rip-rop cholt(lfll
Proposed detention" pond ( l~ f~ 'i C _J(~I [) [~-jD U L.::; L >
EXISTI.NG 4B" FE~Y' I EXl-STING4B"RCP r---- - I" -
i STA 19'+'00 TO 30'+'20 L_ - - - ---
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o ==-------=t-=c--=--=-+ -=-4-=-~-_~~pr~Sed24fi1 nt,oflpond r) :-j
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~) <../ LJ ) 11 ...00 ,XISTJ-NQ, Alile~INLETf "
--....~ '- 'l.O rlj'll::J
,. I AINAGEWAY c'I'... ~ ,~"ST . J'" ~ "I"'" SEW~
'-st~ORA IN 22 ~ f IL~ 'I d TA ~, T(>:L, 00 c.J ~ I .
MATCH LINE DRAWING 16

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DRA1NAGEWAY A-2
SEE DRAWING 26 Fi}R PROFILE

Proposed chonnel
(fee Detail A)

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EX~STING 36" c,ip
CAPACtTY=40 CFS (-c:2Yr.)
ITQ BE REMOVED I

AB~NDON EXISTIt.lG
IS"jCMP ,

NOTE:
fnv..tlgat. combining Dral ag.way
B with A-2 during final sign

Proposed 36" rtcp
90"\ bend '

Pro~ed 40 L.F.
rip-rap channel

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St~. 19+00 :and Sta. 30+20 to $9+70
proposed detention po1<Js aM improved
chann~1 10: be designe'd in accordonce
with Mosf.r Plan for'CenftJnnial Yal/ey
by FauJlr,her-KtJl/('Jg a Assoc, -Inc.
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LANDMARK MAPPING co.
OENVER,COLORAOO
OATE FLOWH: 4/1l'/11

Wf\C ';:~i~~,~~~~;~iJ~J~::~~-"-'':-
)1."le218
Oenvef.Cotorado80222

DESIGflEO~,_DATE 6-82
IlfIAWN a.K.H DATE~
CHECI(EO___~!lATEB-BZ
REVISED__DATE_

CITY OF LOUISVILLE

BOULDER COUNTY

SELECTED ALTERNATIVE OUTFALL DESIGN

DRA1NAGEWAY A-2 PLAN STA. 4+201063+90
DRAINAGEWAY B PLAN STA 3+30 to 36+30
DRAINAGE WAY C PLAN STA. 3+20 to 14+70
DRAINAGEWAY C-I PLAN STA. 18,+,40 to 39+70

URBAN DRAINAGE AND FLOOD CONTROL DISTRICT

BASINWIDE MAJOR DRAINAGEWAY PLANNING

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lItOUHOCONTROLSURVEY!JY
AERIAL PHOTOGIUPHY IY
TOPOGftAPHIC MAPPING IY
CONTOtJR IHTERVAl:4FEI!T

DRAWING 12