FLOOD00479

• Designation Number: 575
• County: Douglas
• Community: Douglas County
• Stream Name: Plum Creek and East Plum Creek
• Title: FHAD - Plum Creek and East Plum Creek
• Date: 9/3/2004
• Prepared For: Doulgas County
• Floodplain - Doc Type: Floodplain Report/Masterplan

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TABLE OF CONTENTS

LISTOFTABLES

I, INTRODUCTION ........,............................,........................,..,............ I

TABLE 1. PLUi\) CREEK FLOODPLAIN AND

FLOODW A Y DATA.................................................................................... 7
TABLE 2. EAST PLUi\) CREEK FLOODPLAIN ANI>

FLOOI>W A Y DA T A........,.............................,.,........................................... 8

LETTER OF TRANSl\llTTAL

.1-\, .t\ 11 tho riza tion ................. ..... ..... ..... ........ .... ..................................... I
13. I)urpose & Scope ........................................................................... I
C. .r\ckno\\'ledgements ....................................................................... I

LIST OF FIGURES

APPENDIX
SHEET NO. I>ESCRIPTION STATIONS
INI>EX Title Sheet/Sheet Index
I Plulll Creek Plan 0+00 to 30+00
2 Plum Creek Plan 30+00 to 63+00
3 Plulll Creek Plan 63+00 to 99+00
4 Plum Creek Plan 99+00 to 135+00
5 Plum Creek Plan 135+00 to 165+00
6 Plum Creek and East Plum Creek Plan 165+00 to 194+00
7 East Plulll Creek Plan 194+00 to 220+00
8 East I'lum Creek Plan 220+00 to 263+00
9 Eastl'llIm Creek Plan 263+00 to 302+00
10 East Plum Creek l'lan 302+00 to 338+76
11 Plulll Creek Flood Profile 0+00 to 60+00
12 Plum Creek Flood Profile 60+00 to 120+00
13 Plum Creek Flood Profile 120+00 to 170+30
14 Plum Creek Split Flow Flood Profile 0+00 to 34+10
15 East Plum Creek Flood Profile 170+30 to 230+00
16 East Plum Creek Flood I'rofile 230+00 to 290+00
17 East Plum Creek Flood Profile 290+0() to 338+76

11. STUI>Y AREA DESCRIPTION, FLOODING HISTORY,
AND PREVIOUS STUDIES..................................................,........... 2
A, Study Areas Deseription.....,......................................................... 2
B. Flooding llistory ...........................................................................2
C. I)rc\'ious Studies ............................................................................2

Ill. HYDROLOGIC AND HYDRAULIC DETERMINATION ..........4
A, Hnlrologie Analvsis............................,......................................... 4
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B. Hydraulic Analysis......................................,............."................., 4
C. Special Hydraulic Analysis ....................................................,..... 4
D. Ineffeetive Flow Areas.....................,............................................ 4

IV. FLOOD HAZARD AREA DE LI i'iEATI ON.................................... 6

A. G e " e ra I........ ............ ....... ....... ........ ............ .............................. ....... 6
B. Floodplain and Floodwa)" Dala ...................................................6
C. Comparison with the Effective Flood Insurance Study............ 6

V. REFERENCES..........................................,......................................... 9

FIGURE I. VICINITY MAl' .....................................................................3
FIGURE 2. PLU:'.1 CREEK AND EAST PLUI\I CREEK
DISCIIARG E PROFI U:S ..............................................,....... 5