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

2100 7.. 30. 30. 1400
'400 0.. 300 300 1.200
100 YEAR 100 YEAR 100 YEAR 100 YEAR
'OGO 00. '00 '00 1000
li li 0; 0; 0;
. 1100 . 400 . .00 . 200 . 000
g g g e g
! w w w w
~ ~ ~ ~
. . . .
C C C C 10 YEAR
Z Z Z Z Z
~ 1200 a 300 U '0. U '00 U 000
. . .
Q ;; 10 YEAR ;; 10 YEAR ;; ;;
000 2.0 '00 '.0 4.0
400 '.0 o. 00 2..
. 0 0 0 0
. o. 120 10. .40 0 o. 12. '00 24. . o. 120 '00 '40 0 8. 120 10. ... . 80 120 '00 24.
TIME (MIN.J TIME (MINJ TIME (MIN.) TIME (MIN.) TIME (MIN.)
DRAINAGEWAY A DRAINAGEWAY B DRAINAGEWAY C DRAINAGEWAY C-1 DRAINAGEWAY D
(Confluence at Coal Creek) (Confluence at Coal Creek) (Confluence at Coal Creek) (Confluence at Coal Creek) (Confluence at Coal Creek)
700 2800 1400 1400 7.0
0.. 2400 1200 1200 00.
100 YJ:AR 100 YEAR 100 YEAR 100 YEAR 100 YEAR
... 2000 1000 1000 000
li 0; 0; 0; 0;
. . . . .
g e g e g
I w w w w
400 ~ 1800 ~ 800 ~ 800 ~ 400
. . .
~ c c c c
z z z z
I u u u u
. . . .
;; ;; " ;;
300 1200 800 800 30.
10 YEAR
... 80. 400 400 200

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

100

400

200

200

100

I

.
.

o
.

.
o

.
o

120
TIME (MIN.J
DRAINAGEWAY E
(Confluence at Coal Creek)

DRAINAGEWAY I
(Confluence at Rock Creek)

o.

'00

24.

8.

120
TIME (MIN.)

.40

'80

00

120
TIME (MIN.)

100

240

8.

12.
TIME (MIN.)

10.

2..

I

DRAINAGE WAY G
(Confluence at Rock Creek)

DRAINAGEWAY H
(Confluence at Rock Creek)

I

mm"

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.....ite 4eu_ndotl f"., futun d...~l"~t i. con.iderM to reduc. tile flOClll
peak. to ..xhtina 4......1"..-..t I_d.. n.. h,drolraphl Ihapt., h(N<l"..r. -,
ch."..._

A.J.L.
8.K.H.
WPR

DATE 6-82
DATE 6-82
D-.TE.....8.:..a.L
DATE_

I

IItOUNllC0f0I1'1tOLSUIlVrYsr
AUIAL PHOTllIIlAPH'l' 1'1'
~APHICIIIAPPINIIY
CONTOUIl INTEIlVAL:" nET

Wf\C"'l"II'lW\"I""""l'I'TI,'"
27MSoulhColorado800~rd
Suile211l
Denver. Color.dol10222

DESIIlNED
OII.aWIt
CHECKED
AE\ltSED

URBAN DRAINAGE AND FLOOD CONTROL DISTRICT

BASINWIDE MAJOR DRAINAGEWAY PLANNING

LANDMARK MAPPING CO.
DENVER,COLORADO
DATE PLOWN:"/~/11

CITY OF LOUISVILLE

BOULDER COUNTY

SELECTED ALTERNATIVE OUTFALL DESIGN

o
.

.4.

'20
TIME (MINJ
DRAINAGEWAY J
(Confluence at Rock Creek)

'00

80

DESIGN FLOOD
HYDROGRAPHS

DRAWING 7