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Appendix 1 1–1 Appendix 1. Ottauquechee River and Reservoir Brook Flood Inundation Maps of the 1-Percent Annual Exceedance Probability (100-Year) Flood and Flood of Tropical Storm Irene in Woodstock, Bridgewater, Sherburne, and Plymouth, Vermont Figures 1–1. Index map showing the extents of the flood inundation maps for the Ottauquechee River and Reservoir Brook, Vermont, (figs. 1–2 through 1–4) ........................................... 1–2 1–2. Map showing flood inundation on the Ottauquechee River and Reservoir Brook, Vermont, and the locations of cross sections and U.S. Geological Survey streamgage 01150900 Ottauquechee River near West Bridgewater, Vt., in Plymouth and Sherburne and parts of Bridgewater, Vt. ................................................... 1–3 1–3. Map showing flood inundation on the Ottauquechee River, Vermont, and the locations of cross sections in Bridgewater, Vt ................................................................... 1–4 1–4. Map showing flood inundation on the Ottauquechee River, Vermont, and the locations of cross sections in Woodstock, Vt ..................................................................... 1–5

Analysis of Floods, Including the Tropical Storm Irene ... · Vermont Route 100A Gunderson Road U.S. Route 4 ... Study reach Road County boundary Town ... sections and U.S. Geological

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Appendix 1 1–1

Appendix 1. Ottauquechee River and Reservoir Brook Flood Inundation Maps of the 1-Percent Annual Exceedance Probability (100-Year) Flood and Flood of Tropical Storm Irene in Woodstock, Bridgewater, Sherburne, and Plymouth, Vermont

Figures 1–1. Index map showing the extents of the flood inundation maps for the Ottauquechee

River and Reservoir Brook, Vermont, (figs. 1–2 through 1–4) ........................................... 1–2 1–2. Map showing flood inundation on the Ottauquechee River and Reservoir Brook,

Vermont, and the locations of cross sections and U.S. Geological Survey streamgage 01150900 Ottauquechee River near West Bridgewater, Vt., in Plymouth and Sherburne and parts of Bridgewater, Vt. ................................................... 1–3

1–3. Map showing flood inundation on the Ottauquechee River, Vermont, and the locations of cross sections in Bridgewater, Vt ................................................................... 1–4

1–4. Map showing flood inundation on the Ottauquechee River, Vermont, and the locations of cross sections in Woodstock, Vt ..................................................................... 1–5

1–2 Analysis of Floods at the Ottauquechee River and Reservoir Brook in Vermont

BRID

GEW

ATER

SHER

BURN

E

BARN

ARD

POM

FRET

WOO

DSTO

CK

PLYM

OUTH

HART

LAN

D

Verm

ont

Rout

e 10

0

Tafts

ville

Dam

Elm

Stre

et

Mou

ntai

n Av

enue

Chur

ch S

treet

Mill

Roa

d

Linc

oln

Cove

red

Brid

ge

U.S.

Rou

te 4

Verm

ont R

oute

100A

Gund

erso

nRo

ad

U.S.

Rou

te 4

U.S.

Rou

te 4

U.S.

Rou

te 4

U.S.

Rou

te 4

U.S.

Rou

te 4

Mou

ntai

nsid

eRo

ad

U.S.

Rou

te 4

Mis

sion

Hill

Farm

Roa

d

Rabe

ck

Mou

ntai

n Ro

ad

RUTLAND COUNTYWINDSOR COUNITY

U.S.

ROU

TE 4

U.S. ROUTE 4

0115

0900

Otta

uque

che e

Riv

er

Reservoir BrookFi

gure

1–2

Figu

re 1

–4

Figu

re 1

–3

72°2

8'W

72°3

2'W

72°3

6'W

72°4

0'W

72°4

4'W

72°4

8'W

43°4

0'N

43°3

6'N

01

0.5

1.5

0.5

1.5

2 M

ILES

01

2 KI

LOM

ETER

S

EXPL

AN

ATIO

N

U.S

. Geo

logi

cal S

urve

y st

ream

gage

an

d id

entif

icat

ion

num

ber

0115

0900

Stat

e an

d co

unty

bou

ndar

ies

from

U.S

. Geo

logi

cal S

urve

y, 1:

2,00

0,00

0-sc

ale

digi

tal d

ata,

200

5Ve

rmon

t Sta

te P

lane

Coo

rdin

ate

Syst

emN

orth

Am

eric

an D

atum

of 1

983

Road

Stud

y re

ach

Coun

ty b

ound

ary

Tow

n bo

unda

ry

Figu

re 1

–1.

The

exte

nts

of th

e flo

od in

unda

tion

map

s fo

r the

Otta

uque

chee

Riv

er a

nd R

eser

voir

Broo

k, V

erm

ont,

(figs

. 1–2

thro

ugh

1–4)

.

Appendix 1 1–3

# 01150900

P

N

MO

L

K J

IH

G F

E D

CB

A

ARAS

AT

AU

AV

AW

AYAZ

BA

BB

BC

BD

BE

BF

BG

BHBI

BJ

BK

BL

R

eser

voir

Bro o

kOttauque c hee River

72°44'W72°46'W72°48'W

43°38'N

43°36'N

EXPLANATION

U.S. Geological Survey streamgage and identification number

Cross section

Town boundary

Extent of 2011 tropical storm Irene flood

Extent of 100-year flood

BRIDGEWATER

PLYMOUTH

SHERBURNE

MENDON

0 0.5 1 MILE

0 0.5 1 KILOMETER

01150900

Orthophotograph from National Agriculture Imagery Program, 2011Vermont State Plane Coordinate SystemNorth American Datum of 1983

Figure 1–2. Flood inundation on the Ottauquechee River and Reservoir Brook, Vermont, and the locations of cross sections and U.S. Geological Survey streamgage 01150900 Ottauquechee River near West Bridgewater, Vt., in Plymouth and Sherburne and parts of Bridgewater, Vt.

1–4 Analysis of Floods at the Ottauquechee River and Reservoir Brook in Vermont

AZ

AY

AX

AW

AV

AU

ATAS

AR

AQ

AP

AO

AN

AM

AL

AK

AJ

AI

AH

AG

AF

AE

AD

AC

H

GFED

CB

A

Reservoir Brook

Otta

uque

chee

Rive

r

72°3

8'W

72°4

0'W

72°4

2'W

72°4

4'W

43°3

8'N

43°3

6'N

43°3

4'N

EXPL

AN

ATIO

N

Rive

r cro

ss-s

ectio

ns

Tow

n bo

unda

ries

Exte

nt o

f 201

1 tr

opic

al s

torm

Iren

e flo

od

Exte

nt o

f 100

-yea

r flo

od

WOODSTOCK

BRI

DG

EWAT

ER

PLYM

OU

TH

SHER

BU

RNE

01

0.5

MIL

E

01

0.5

KILO

MET

ER

Orth

opho

togr

aph

from

Nat

iona

l Agr

icul

ture

Imag

ery

Prog

ram

, 201

1Ve

rmon

t Sta

te P

lane

Coo

rdin

ate

Syst

emN

orth

Am

eric

an D

atum

of 1

983

Figu

re 1

–3.

Floo

d in

unda

tion

on th

e Ot

tauq

uech

ee R

iver

, Ver

mon

t, an

d th

e lo

catio

ns o

f cro

ss s

ectio

ns in

Brid

gew

ater

, Vt.

Appendix 1 1–5

ZY

XW

VU

T

S

R

Q

P

O

N

M

L

K

JI

H

G

F

E

D

C

BA

AA

AB

AC

AD

Ottauq

uech

ee R

iver

72°2

8'W

72°3

0'W

72°3

2'W

72°3

4'W

72°3

6'W

43°3

8'N

43°3

6'N

EXPL

AN

ATIO

NCr

oss

sect

ion

Tow

n bo

unda

ry

Exte

nt o

f 201

1 tr

opic

al s

torm

Iren

e flo

od

Exte

nt o

f 100

-yea

r flo

od

WO

OD

STO

CK

BRI

DG

EWAT

ER

HA

RTLA

ND

POM

FRET

00.

51

MIL

E

00.

51

KILO

MET

ER

Orth

opho

togr

aph

from

Nat

iona

l Agr

icul

ture

Imag

ery

Prog

ram

, 201

1Ve

rmon

t Sta

te P

lane

Coo

rdin

ate

Syst

emN

orth

Am

eric

an D

atum

of 1

983

Figu

re 1

–4.

Floo

d in

unda

tion

on th

e Ot

tauq

uech

ee R

iver

, Ver

mon

t, an

d th

e lo

catio

ns o

f cro

ss s

ectio

ns in

Woo

dsto

ck, V

t.