FLOOD10485

• County: Arapahoe
• County: Douglas
• Stream Name: Big Dry Creek
• Basin: South Platte
• Title: Big Dry Creek ‎(Arapco)‎ & Tributaries - Major Drainageway Planning - Phase B Preliminary Design Report
• Date: 4/1/1998
• Prepared For: Arapahoe County, Douglas County, Englewood, Greenwood Village, Littleton, UDFCD
• Prepared By: WRC Engineering, Inc.
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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TWO-HOUR DESIGN STORM FOR BASINS BETWEEN FIVE AND TEN SQUARE MILES
INCREMENTAL RAINFALL DEPTH/RETURN PERIOD

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n n n n n n n n n n n n n n n n n n n n n n n n n n n
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o 000 0 0 0 0 0 000 0 0 0 0 0 0 0 0 0 0 0 0 000

o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 000 000

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100- YR
(IN)

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50- YR
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10-YR
(IN)

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5-YR
(IN)

03

2-YR
(IN)

02

TIME
(MIN)

5

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.08

.08

06

.05

04

10

12

11

14

12

09

15

.21

18

24

21

16

20

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35

33

40

35

26

25

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62

55

19

18

14

30

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35

26

.09

08

07

35

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18

.07

.06

05

40

I

16

11

.06

05

03

45

13

11

05

05

03

50

I,

10

.07

05

04

03

55

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a

10

.07

.05

04

03

60

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10
05

.07
05

05

.04

03

65

05

.05

05

.05

04

.04

02

02

70

75

I

03

.04

.04

03

02

80

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03

.04

03

03

02

85

.03

.03

03

.03

02

90

I

03

03

.03

03

.03

.03

03

02

.02

02

95

100

I

03

03

03

03

.03

03

.02

02

02

02

105

110

I

I

03

03

2.93

03

2.54

03

.03

02

85

.02

02

60

.01

8

.0

115

120

TOTAL

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