FLOOD06162

• Designation Number: 183
• County: Douglas
• Community: Unincorporated Douglas County
• Stream Name: Dad Clark Gulch
• Basin: South Platte
• Title: Flood Hazard Area Delineation - Dad Clark Gulch, Douglas County, Colorado
• Date: 5/1/1981
• Designation Date: 4/1/1982
• Floodplain - Doc Type: Floodplain Report/Masterplan

I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

FLOODING SOURCE FLOOD PLAIN DATA FLOODWAY DATA(1)
CROSS STATION STREAM 10o-YR 10o-YR FLOODWAY WIDTH (F1)l2l FLOODWAY
IDENTIFICATION 0100 BED ELEV. FLOOD ELEV. ELEY.
SECTION (F1) (CFS) (MSU (MSU WI DTH (F1) L BANK R, BANK TOTAL (MSU
Ca na 1 Ro a d - Begin Backwater 1 5 133+00 3943 5511 .6 5546.5 417.6
Condition due to Culvert 16 136+00 3943 5512.7 5546.5 500.3
17 139+00 3943 5516.8 5546.5 557.7
18 142+00 3943 5520.8 5546.5 488.2
Confl uence Wi th Reach 6 1 9 144+75 3943 5522.8 5546.5 473.7
20 147+00 2768 5527.9 5546.5 262.4
21 149+00 2768 5528.7 5546.5 249.3
22 154+00 2768 5532.8 5546.5 146.8
( 3 ) 23 156+68 2768 5535.8 5546.5 165.5
Broadway 24 159+00 2768 5538.7 5566.0 713.2
25 163+40 2768 5542.0 5566.0 297.3
26 167+00 2768 5547.8 5566.0 221 .6
Confl uence With Reach 5 27 '170+40 2768 5552.8 5566.0 229.5
28 174+20 2768 5558.8 5566.0 160.1
29 178+00 2768 5558.8 5567.5 58.1 .
Upstream Limit of Backwater 30 180+54 2768 5562.8 5570.8 113.7
Effects Due to Cul vert at
Station 159+00
Dad Clark Drive and North 78 297+80 1984 5743.0 5762.0 249.7
Highlands Loop - Begin
Backwater Condition Due 79 301+00 1953 5747.5 5762.0 277 . 3
to Culvert
- 80 302+56 1953 5750.0 5762.0 252.0
81 305+33 1953 5755.0 5761 .9 . 182.6
Upstream Limit of Backwater 82 307+40 1953 5758.7 5762.7 83.5
Effects Due to Culvert at
Station 297+80
West Parker Road - Begin' 96 342+00 1953 5816.0 5841 .0 595.7
Backwater Condition Due to
Culvert
.

(1) Floodway data are based on encroachment causing up to 0.5 ft. vertical rise in the 100-y~ar 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 measuy'ed from the center of the flowl ine 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.

REVISED 10-9-80

6\1<1.'5<0~~ ''-'''>l'''''f . ,....e..fv.<:lC.(', . cCko<wxlOl("':

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

FLOOD PLAIN AND FLOODWAY REFERENCE DATA

~JlJQCk?;~~~~~~PQny

DAD CLARK GULCH

TABLE 4 '
SHEET A