FLOOD06660

• County: Douglas
• County: El Paso
• County: Elbert
• Community: Franktown, Parker
• Stream Name: Cherry Creek Watershed
• Basin: South Platte
• Title: Franktown Parker Tributaries fo Cherry Creek Watershed
• Date: 4/1/1960
• Prepared For: State of Colorado
• Prepared By: USDA Soil Conservation Service
• Floodplain - Doc Type: Floodplain Report/Masterplan

TABLE 3 - STRUCTURE DATA

. -"" - - -- -

n

ii

FLOO~vATER-RETARDING STRUCTURES AND
COHBINATION GRADE STABILIZATION AND FLOODWATER-RETARDING STRUCTURES

Franktown-Parker Watershed, Colorado

1,

t

,.

i
I

.

j~
,
,
,

inch
inch

2.32
0.72

i
[
1.

o
o
94.6

3.50
1.56

i

<
r

i FP-Pl

0.68

9
47
o
56

100
262
o
362

I 2.0 10.0
I 7.4 24.5
o 0
38,32192,123
45.3 113.0
27.5 47.5

40.3
85
Earth
1
82

71
4:-90
3.00

o
o
40.3

81
12-:-25
9.95

9.4
2210
45.3

108.0
70
Earth
4
76

2.20
0.51

o
o
108.0

3.30
1.22

6.8
670
111.0

36.90

35
95
o
130

5.6
14.5
o
49,136
88.8
31.5

84.8
90
Earth
4
76

2.30
0.57

o
o
84.8

3.45
1.32

8.0
1485
38.8

33.39

0,25 0.25 0.231 0.22
0.7Z 1.40 I 0.63 0.63
., ~" 3,; _ j"~;~~_~L~_~,~32J,,_gh 44

Drainage Area
storage Capacity i
Sediment aC.ft./ 36
Floodwater ac.ft'II04
Water supply ac,ft.; 0
Total i ac.ft'l 140
Surface Area i I
Sediment pool f acre I 4.3
Flooctl'/ater pool 'acre 10.0
Water supply pool I acre 0
Volume of Fill /'CU.YdS. 51,781
Elevation Top of Dam feet 98.6
Haximum Height of Dam feet I 37.9
I Emergency spillway I I
Crest elevation I feet
Bottom width I feet
Type
Per cent chance af lire I
Ave. Curve No.-Cond II :
Emergency Spillway I
hydrograph
Stom rainfall
(6-hr.) 21
Stom runoff
Velocity of flow
(vc) 1I
Discharge rate 11 .
Max w.s. elev. II I
Freeboard hydrographi
Stonn rainfall I
( 6-hr . ) 31 ' inch
Stom runoff inch
Velocity of flow
(vel:!:.1 'ftlsec I 7.4
Discharge rate 11 I c.f.s.'1l23
- I
Hax. w.s, elev. 111 feet i 97.8
Principal Spillway I
' Capacity-low stage I c.f.S.' 35.38 14.16
, Capaci ty Equivalents I
Sediment volume inch i
Detention volume inch I'
Spillway storage inch
Class of structure
11 Haximum during passage of hydrograph.
21 Six-hour rain adjusted for area x 0.5 (Engineering Memorandum No. 27. revised),
3/ Six-hour rain adjusted for area x 0,75 (Engineering Memorandum No. 27, revised),
71 Six-hour rain adjusted for area x 1.0 (Engineering Memorandum No. 27, revised).
II Six-hour rain adjusted for area x 2,5 (Engineering Memorandum No. 27, revised).

Date: April 1960

10
34
o
44

1.8
5,2
o
22,455
88,S
27.3

84.5
70
Earth
4
81

2.40
0,87

o
o
184.5

3,60
1.79

6,6
630
87.4

114.78

0.23
I 0.87
I 0 68
1__. Jl
!"'!l-:'

99
243
o
342

4.6
17,3
o
69,395
121.7
47.0

116.7
67
Earth
4
78

2.20
0,60

o
o
116,7

3.30
1,35

9,4
1675
121,7

86.56

0.24 I
0.68
o 24
__L_~'.at'i___ .__.\

1,043
3,427
o
I 4,470

I 193.3
I 46~.0

!953,498

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