FLOOD09746

• County: Statewide
• Basin: Statewide
• Title: Colorado Statewide Drainage Floodplain Management Criteria Manual
• Date: 8/1/2002
• Prepared By: CWCB & WRC Engineering Inc
• Floodplain - Doc Type: Educational/Technical/Reference Information

.

COLORADO STATEWIDE
DRAINAGE AND FLOODPLAIN MANAGEMENT CRITERIA MANUAL

.

2-,5-, and 10-YearOesign Rainfall 25-, 50-, 100-, and 500-Year Design
Area-Square Miles Rainfall
Area-S uare Miles
Time
Minutes 10-20 20-30 30-50 50-75 10-20 20-30 30-50 50-75 .
5 1.00 1.00 1.10 1.10 1.00 1.00 1.05 1.10
10 1.00 1.00 1.05 1.10 1.00 1.00 1.05 1.10
15 1.00 1.00 1.05 1.00 1.00 1.00 1.05 1.10
20 0.90 0.81 0.74 0.62 1.00 1.00 1.05 1.00
25 0.90 0.81 0.74 0.62 - 0.90 0.81 0.74 0.60
30 0.90 0.81 0.74 0.62 0.90 0.81 0.74 0.60
35 1.00 I. 1.00 1.05 1.00 0.90 0.81 0.74 0.70
40 1.00 1.00 1.05 1.10 1.00 1.00 1.05 1.00
45 1.00 1.00 1.05 1.10 1.00 1.00 1.05 . 1.10
50 1.00 1.00 1.05 1.10 1.00 1.00 1.05 1010
55 1.00 1.00 1.05 1.10 1.00 1.00 1.05 1.10
60 1.00 1.00 1.05 1.10 1.00 1.00 1.05 1.10
65 -120 1.00 1.00 1.05 1.10 1.00 1.00 1.05 1.10
125 - 180 1.00 1.15 1.20 1.40 1.00 1.15 1.20 1.40
185 - 360 N/A 1.15' 1.20 1.20 N/A 1.15 1.20 1.20

I
I

~
s
.
.

~
"
,
~

~
~
.

VERSION: AUGUST 2002 REFERENCE:

\XIf\C 9\lGIN;I;;~~. ~

UDFCD

TABLE CH5.T104

CUHP AREA ADJUSTMENTTABLE