FLOOD10390

• County: Boulder
• Community: Boulder
• Stream Name: Fourmile Canyon
• Basin: South Platte
• Title: Fourmile Canyon Creek - Major Drainageway Planning - Phase A Report - Alternatives Analysis
• Date: 6/1/2000
• Prepared For: UDFCD, Boulder
• Prepared By: Love & Associates
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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Estimated Blockage at Major Drainage Structures - Fourmile Canyon Creek

Location Regulatory Study (1) Restudy (2) Current Study
% %
Existing Proposed
Structure Structures
s %
%
Pedestrian Crossing NA NA NA 100
upstream of Broadway
Broadway 20 20 0 0
Pedestrian Crossing NA NA 0 0(3)
downstream of Broadway
Violet 40 40 0 40
Up land 50 40 0 50
Footbridge 10 - - -
19lb 10 10 0 10
Sumac 30 - 0 30
Topaz -~_. 30 30 0 30
26111 20 - 0 20
Elks (wood bridge) 40 - 0 40
Elks (pedestrian bridges) 20 - 0 0(4)
28111 0 - 0 0
30111 0 - 0 0
47111 Culvert - Culvert - - 0 100
47111 Culvert - Pedestrian - - 0 0
Underpass

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1987,

&

Love

Phase "B". May

1999,

May

Table 7, Major Drainageway Planning, Boulder and Adjacent County Drainageways,
Greenhome & O'Mara, Inc.
Fourmile Canyon Creek, Floodplain Study and
Associates, Inc.
Existing structure not included in model.
Assumed the pedestrian bridges will wash away.

Revision,

Map

of

Letter

(1)
(2)
(3)
(4)

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B-1

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