FLOOD01357

• Designation Number: 107
• County: Jefferson
• Community: Unincorporated Jefferson County
• Stream Name: Green Mountain Area
• Title: FHAD - Green Mountain Area
• Date: 4/1/1978
• Designation Date: 7/11/1978
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE 5c

GREEN MOUNTAIN AREA
FLOOD HAZARD AREA DELINEATION

DESIGN RUNOFF SllMMARY

TABLE 6
BASIN-G - SUMMARY OF FLOW SPLITTING

FUTURE OEVELOPMENT
DESIGN TRIB. EXI~ II Nh 'Ar.T1 TTTFC:;
PT. LOCATION AREA 10 YEAR 100 YEAR
STA. (Mi2) Qp Vol. Qp Vol.
cIs AF cfs .elF
DRAINAG WAY ilL II
179+00 Alameda Pkwy .119 100 4,8 180 9,5
151+00 Welch Cir. .198 140 8,5 250 16,4
129+50 Drain. L-l, U/S ,264 190 11.7 330 22.1
129+50 Drain. L-1, D/S .450 . 350 20.2 550 37.8
120+70 J ewe 11 Ave,. U/S .598 470 28,0 750 51.2
120+70 Jewell Ave" D/S ,598 410 3.e 560 8,4 stored volume
99+50 Wrioht St,. U/S .784 530 37,6 750 67,8
99+50 WriQht St., D/S .784 380 8.4 690 13.7 stored volume
. 52+00 - 1. 056 460 51.7 800 92.1
0+00 Bear Creek Confl. 1.523 650 76.~ 1040 134.6
DRAINAG WAY "L-l"
35+65 Beech Ct, .063 70 2,7 110 5,1
22+70 Welch Cir" U/S .114 110 5. 180 9,6
22+70 Welch Cir" D/S ,114 100 O. 130 1.3 stored volume
0+0 Ora i n L r.onfl .186 160 8. 220 15.7

DESIGN FUTURE DEVELOPMENT EXIST.
POINT 10 YEAR 100 YEAR FACIL.
STA. LOCATION Op I V Op V CAPAC.
cfs- L af._ --cis- .. cfs
I
,
39+00 H 1-70 U/S - Basin H 0 I 0 65 0.8 120
Flow Split
34+00 G-2 6th Avenue U/S -
Flow Spl it 300 7.0 570 16.5 160
49+00 G 6th Avenue at
Fairgrounds -
Flow Split 290 7,6 1010 36.5 680
6th Ave. & Indiana
Tota 1 Flow 430 17.7 1190 52.0
Lena Gulch 500 24,8 1260 61.8

NOTES: 1. Flood peaks have been channel routed to D/S desi9n point.

2. Flood peaks at 6th Avenue & Indiana assumed to return to
channel at Colfax Avenue.