FLOOD05115

• County: Boulder
• County: Weld
• Community: Erie
• Stream Name: Coal Creek
• Basin: South Platte
• Title: Floodplain Information Report
• Date: 8/1/1980
• Prepared For: Erie / Boulder County / Weld County
• Prepared By: Water Resource Consultants
• Contract/PO #: &&
• Floodplain - Doc Type: Floodplain Report/Masterplan

FIGl:RE-l

FIGURE-2

FIGURE-l

FIGURE-4

FIGURE-S

FIGURE-6

FIGURE-7

FIGURE-R

LIST OF FIGURES

STUDY AREA LOCATION

COAL CREEK DRAINAGE BASIN

PLAN FOR FLOOD CONTROL AT ERIE (ARMY CORPS OF
ENGINEERS)

PHOTO - COAL CREEK FLOOD OF MAY 7, 1969

INDEX MAP FOR fLOODED AREA PLATES

FLOOD DAMAGE VS. PROBABILITY OF EXCEEOENCE
Reach 2

FLOOD DAMAGE VS. PROBABILITY Of EXCEEOENCE-
REACH 4

INDEX MAP FOR FLOOD CONTROL A~D FLOODPLAIN
~~NAGEMY.NT PLAN PLATES

m

p~"C

;

"

TABLI':-1

TABLE-2

"

TABLE-.3

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TABLE-4

"

TABLE-S

TABLE-6

"

TABLE-7

71

TABLE-8

TABLE-9

"'

TABLE-I0

TABLE-ll

TABLE-12

TABLE-13

TABLE-14

TABLE-IS

TABLE-16

LIST OF TABLES

CONTROL MARKER DATA

FLOODWAYCRlTERIA

PEAK FLOOD DISCHARGES, COAL CREEK

FLOOD ELEVATIONS FOR VARIOUS FLOOD FREQUENCIES

WESTVIEW ESTATES FLOOD DATA

SUMMARY OF FLOODING FOR COAL CREER

SUMMARY OF RESIDENTIAL DAMAGES FOR COAL CREEK

SUMMARY OF EASELINE FLOOD DAMAGES

SUMMARY OF BASELINE FLOOD DAMAGES

SUMt'.ARYOFALTERNATIVEP!,.AN$

REACH:!

REACH 4

RECOMMENDED FLOOD CONTROL AND FLOODPLAIN
MANAGEMENT PLAN

COSTO:STIM<\.TES

SUMMARY OF AVERAGE ANNUAL BENO:FITS

AVERAGE AlINUAL CAPITALIZAIION COSTS

AVERAGE ANNUAL CAPITALIZATION COSTS

BENEFIT/COST RATIOS

'"

REACH 2

REACH 4

PaR"

7-8

w

"

41-4.3

"

"
63

'8

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74-7S

82-83

84
81

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