FLOOD10116

• County: Douglas
• Community: Douglas County
• Stream Name: Dad Clark Gulch
• Basin: South Platte
• Title: FHAD - Dad Clark Gulch
• Date: 2/1/1980
• Prepared For: Douglas County
• Prepared By: UDFCD
• Floodplain - Doc Type: Floodplain Report/Masterplan

FLOOD PLAIN AND FLOODWAY REFERENCE DATA

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FLOODING SOURCE

FLOOD PLAIN DATA

STREAM
BED ELEV.
(MSl.)

10o-YR 10o-YR
FLOOD ELEV.
(MSL) WIDTH (Fl)

CROSS
SECTION

STATION
(Fl)

0100
(CFS)

IDENTIFICATION

Canal Road - Begin Backwater 15 133+00 4515 5511.6 5546.5 417.6
Condition due to CuI vert 1 6 136+00 4515 5512.7 5546.5 500.3
1 7 139+00 4515 5516.8 5546.5 557.7
18 142+00 4515 5520.8 5546.5 488.2
Confl uence Wi th Reach 6 19 144+75 4515 5522.8 5546.5 473.7
20 147+00 3118 5527.9 5546.5 262.4
21 149+00 3118 5528.7 5546.5 249.3
22 154+00 3118 5532.8 5546.5 146.8
(3 ) 23 156+68 3118 5535.8 5546.5 165.5
Broadway 24 159+00 3118 5538.7 5566.0 713.2
25 163+40 .3118 5542.0 5566.0 297.3
26 167+00 3118 5547.8 5566.0 221 .6
Confl uence Wi th Reach 5 27 .170+40 3118 5552.8 5566.0 229.5
28 174+20 3118 5558.8 5566.0 160.1
29 178+00 3118 5558.8 5566.0 55.2
Upstream Limit of Backwater 30 180+54 3118 5562.8 5570.8 113.7
Effects Due to CuI vert at
Station 159+00

Dad Clark Drive and North 78 297+80 2165 5743.0 5762.0 249.7
Highlands Loop - Begin
Backwater Condition Due 79 301+00 2165 5747.5 5762.0 . 277.3
to Culvert
80 302+56 1898 5750.0 5762.0 252.0
81 305+33 1898 5755.0 5761 .9 . 182.6
Upstream Limit of Backwater 82 307+40 1898 5758.7 5762.7 82.7
Effects Due to Culvert at
Station 297+80

West Parker Road - Begin
Backwater Condition Due to
Culvert

96

342+00

1898

5816.0

5841 .0

595.7

(1) Floodway data are based on encroachment causing up to 0.5 ft. vertical rise in the IOO-year flood elevation.
Where floodway data are not given they shall be assumed to be identical to the flood plain data.

(2) Left and right distances are measured from the center of the flowline of the channel looking downstream.

(3) The culvert at Broadway serves as the upstream limit of backwater effects due to a culvert at station 133+00
as well as being the beginning point for a new backwater condition.

IJ Jack L~~ ~~~PQny

URBAN DRAINAGE AND FLOOD CONTROL DISTRICT
FLOOD HAZARD AREA DELINEATION
DOUGLAS COUN1Y

FLOODWAY DATA(1)

FLOODWAY WIDTH (Fl)12l
L. BANK R. BANK TOTAL

6'lIX'5(";.~~Y05f"'" . ,..c..."""'" l 0<0<>,0.,,,,.., '.

DAD CLARK GULCH

FLOODWAY
ELEV
(MSl.)

TABLE 4
SHEET A