FLOOD08354

• County: Boulder
• Community: Lafayette
• Stream Name: Coal Creek , Waneka Reservoir
• Basin: South Platte
• Title: Major Basinwide Planning
• Date: 12/1/1980
• Prepared For: Boulder County
• Prepared By: Camp Dresser & McKee
• Floodplain - Doc Type: Floodplain Report/Masterplan

I
I
I
I

I

800
700
_ 600
(J)
...
2 500
w
<!>
0:: 400
<t
:r:
<) 300
(J)
0
200
100

I
I

I
I
I
I
I

I
I
I

I

I
I
I

Drainageway I and
Weld County Road

1500

800 Drainage 3 and 800 Drainagewa 4 and
ay
Draine way 2 and Coal Creek Cool reek
North 19th Street 700 700
en 600 en 600
... ...
<) <)
- 500 - 500
w 100 eor w
100 Y or <!> <!>
0::400 0:: 400
<t <t
:r: :r:
<) <)
':'! 300 (J) 300
0 10 Year 0
200 200
10 Yor
100 100
50 100 150 50 100 150 200 50 100 150
TIME (MIN) TIME (MIN) TIME (MIN)

en
...
21000
w
<!>
0::
<t
:r:
<)
(J)
o 500

coo Draine ewoy 5 and 800 Orainageway 6 and 800
Sauth aulder Raad Coal Cr ek
700 700 700
en 600 _ 600 en 600
(J)
... 100 Yeor ... ...
<) <) <)
- 500 ~ 500 - 500
w w W
<!> <!> <!>
0:: 400 0:: 400 0::400
<t <t <t
:r: :r: I
<) ~3OO <)
~3OO (f) 300
0 0 0
200 200 200
10 Vear
100 100 100
50 100 150 50 100 150
TIME (MIN) TIME (MIN)

50 100
TIME (MIN)

150

Oraina eway 7 and
C I Creek

50

100
TIME (MIN)

150

200

FIGURE 4'

SELECTED IO-YEAR AND IOO-YEAR
STORM HYDROGRAPHS FOR THE
SELECTED BASINWIDE DRAINAGEWAY
PLAN.