multi-hazard mitigation presentation
DESCRIPTION
Presentation to the Dennis Planning Board on December 7, 2009 regarding FEMA Multi-Hazard Mitigation PlanTRANSCRIPT
Town of DennisMulti-Hazard Mitigation Plan
Draft November 5, 2009
The purpose of this plan is to fulfill the federal regulations for the Federal Emergency Management Agency’s (FEMA) Mitigation Planning, under the Code of Federal Regulations (CFR) Title 44 Part 201. All cities and towns are required to adopt local multiple-hazard mitigation plan in order to remain eligible for the Federal Emergency Management Agency (FEMA) Hazard Mitigation Grant funds (available after a disaster is declared) and to be eligible for other federal hazard mitigation funds. The plan attempts to provide a process for the Town of Dennis to accomplish the following:
• Identify risks• Assess the town’s vulnerability• Reduce future damages• Meet community needs• Achieve multiple objectives• Promote public participation• Increase funding eligibility• Provide a guide post for disaster recovery• Promote cooperation
Hazard Mitigation Preparedness Process
Section 2: Hazard Analysis and Risk Assessment
Section 201.6(C)(2) of the regulations requires the Town of
Dennis to provide a hazard and risk assessment. This process will
include a description of the town, a discussion of “at-risk” communities
and an analysis of relative risk.
FLOODING
• About 5,087 year round residents located in flood zone
• About 13,900 people in flood zone during summer
• 2,976 acres within flood zone
We Really Need To Worry About This Larger
Flood Potential Area
Photos from the Chase’s Ocean Grove Homeowner’s Association Website
STORMS
Storms
New England Hurricane of 1938“1938 storm's greatest killer and what caught most people off guard: storm surge.”
“To the east, the surge left Falmouth and New Bedford under eight feet of water. Two-thirds of all the boats in New Bedford harbor sank.”
Storm Surge - Tidal Departures
Fairhaven, MA - 25 feet above MLWPocasset, MA - 20 feet above MLWNobska Point Light Station (Woods Hole, MA) - 15 feet above MLWFall River, MA - 18 feet above MLW
Hurricane Storm Surge
Hurricane Storm Surge
Hurricane Storm Surge
Hurricane Storm Surge
Hurricane Storm Surge
OLD B
ASS
RIVE R
RO A
D
SET U
C KET R
O AD
CRA
NBER R
Y HIG H
WAY
DEP
OT S
TREE
T
MAIN
ST R
EET
LOWER
COUNTY ROA D
CEN
TE R S T
R EET
AIR
LINE
ROA D
UP PE R CO U
N TY ROA D
SE
A STR
EET
EAS
T WE
ST D
ENN
IS R
OAD
SOU
TH ST
REET
OLD W
HA RF R OA
D
HOKUM ROCK ROA D
MA YF A IR ROA D
SE SUIT NECK ROA D
MID C
A PE HIGHW
A Y
SHA
D HO L
E RO
A D
DIV
ISION
STR
EET
OL D CHA
T HA M ROA D
SCARGO HIL L
ROAD
BE ACH ST REE T
TRO
TTIN
G P A
RK RO
A D
CO
V E R O
A D
LO
RIN G
AVE
NUE
BA
X TER
STRE
ET
WH
IG ST
REE T
SW
AN RIV
ER RO
AD
GREAT WE
S T ER N ROA D
NEW B
OS TON ROA D
BR
IDGE
STR
EET
KIB
B Y L
ANE
NO
B SCU S
S ET R
OA D
FISK
STR
EET
CE NT RE ST RE ET
GAGE
S WA
Y
TE
LEGR
APH
RO A
D
SEAR
S R
OAD
SHOR
E D RI VE
COR
P OR
A TION
ROA
D
CA
PTA I
N CH
ASE
ROA
D
POND S TREET
CY
NTHI
A LA
NE
PR IN CE WA Y
SE AR S
VIL LE ROAD
CO
R NE
LL D R
IVE
WES T DE N
NIS B EA CH ROAD
QU
IVET
DRIV
E
UN
C LE B
ARN E
YS R
O AD
CEDA
R H
ILL R
OAD
ACOR
N R
OAD
HOP E
L ANE
CHA
PIN B
E ACH
ROAD
GL
ENDO
N R
OAD
TA UNT ON
A VE NUE
PIL GR IM
ROAD
BA
IN RO
AD
BE
ATEN
RO A
D
SOUT
H YA
RMO
UTH
ROA
D
SEAS IDE A
V ENUE
HOW
ES P
ATH
HIL LS IDE DRIVE
EL IZA BE TH
L ANE
SIG NA L
H ILL D R
IV E
PA
DDO
CKS
PATH
ACCES S
ROAD
LA
WRE
NCE
ROAD
COL
ES PO
ND RO
AD
SO
UTH
VILL
AGE
ROA
D
BL
ACK F
LATS
RO
AD
AGNE
S R OA D
SHOR E ROAD
SIA
SCO
NSET
RO
AD
OC
E AN
DRIV
E
BUC
KL EY R
O AD
PO
LLY F
ISK
LANE
MIC
HAE
LS A
VENU
E
OLD
TOW
N LA NE
CA
LVI N
DRIV
E
INM
AN R
OADP
INE R
OAD
CLI
PPER
LAN
E
UN
CLE
ROLF
ROA
D
HI GHBANK
ROAD
OLD M
AIN S TR
EE T
SCA
R SD
AL E R
O AD
BRA DF
ORD ROA D
TH E OP HI L
U S F SMITH ROAD
SURF SI DE
R OAD
KIN
GS R
OW
D RIV
E
EA
SY S
TREE
T
PILO
T DR
IVE
JAN
ALL
DRIV
E
IND
I AN P
OND
ROA
D
SUNS E
T LANE
MERCH
A NT AVE NUE
HA RB OR ROA D
KING
J AM
ES D
RIVE
JAY
S DR
IVE
DE B BIE L A
N E
HORSE FOO
T P A TH
LON
G H
ILL R
OAD
SU
SAN
RUT H
ROA
D
SCHO
OL S
T REE
T
OA
K ST
R EET
COL
ES PON D
D RI VE
HIGHLA ND ROAD
AS ACK DRIV E
LAD
Y SL
IPPE
R DR
IVE
JONA THAN
DRI VE
RIC
E LA
NE
KINGSWE AR CIRCL E
ELM S TR
EE T
LO
RREE
LAN
E
VI KI NG D
RI VE
JA SMIN E ROA D
CH AR
LE S S TR
EE T
SE SUIT
R OA D
SE A ME ADOW D
RI VE
GA
R FIE L
D LAN
E
LIG
HTH O
USE R
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BA
SSE T
T LA
NE
HIR AM
POND R O
AD
UN CL E BI LLS WAY
FREYDIS
ROA D
BA
KERS
PO N
D R
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ARBORWAY
UN
NAM
E D R
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WI LD HUNTE R
LA NE
FLAX
STR
EET
UNCL E BOB S WAY
MOO
RING
LAN
E
MAD
ISON
R OA D
SE
TTLE
RS L
ANE
FE
NWA
Y
SA NTUC K ET
ROA D
HO
LIDA
Y LA
NE
CAS
SIDY
AVE
NUE
WES T ST RE ET
HE MLOCK L ANE
YA
LE CI
RCL E
FAR M
LA NE
PAC
KE T D R
I VE
DOR
OTH
Y WA
YGR
ACE
S WA
Y
NORSE M
AN DRI VE
WI NDS OR A VE NUE
MAR
INER
ROA
D
CO
L D ST
ORAG
E RO A
D
LAK
E DR
IVE
JET W
AY
THORWA
LD DRI VE
FEDE RAL LA NE
GRA
SSY
PON
D D R
IVE
LO
NGEL
L RO
AD
BLA
C K B
ALL H
ILL R
O AD
ED
G EME
RE R
OAD
ST EP HEN P
HI LL IP ROAD
CRAIG
ROAD
FIO
RD W
AY
GRE
ENLA
ND C
IRCL
E
SUM
MER
STR
EET
HAZE L WOOD ROA
D
WI
XON
ROA
D
SHIV
ERIC
K R
OAD
CHADWICK ROA D
EAS
T OVE
R
WA MPA NOAG
T RAIL
MIL L ST REE T
PORT ER
L ANE
INDIA N FI EL D DRIVE
LO
NGFE
LLO
W DR
IVE
HAL
L STR
EET
REG AN
R OA D
BA R RY LA N E
UN
ION W
HA
R F RO
AD
EL LI S DRIVE
OLD
MAY
F AIR
ROA
D
STO
NY W
AY
HIG
H H E
AD R
O AD
NO
RTH
ERN
A VEN
UE
RAMP- R
T 13 4 TO RT 6 E
B
HORSE
F OOT ROA D
RAMP
- RT 13 4 TO
RT 6 WB
CHU
RCH
STR
EET
SA LT WORK S ROAD
BAY
RI DG E
D RIV E
WH
ITTIE
R DR
IVE
DEP
OT RO
AD
PAUL
ST R
EET
HA LF
WAY
RIV
ERW
AY
CEDA R LA NE
ALBI O
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AY
LIN
DEN L
ANE
MY
RTLE
RO
AD
LI EF ERIC
K SON DR IVE
ROB BIN RU N
JUN IP
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A D
UN CL E STAN L EY S WA Y
ME A DOWSP RING DRIVE
REN
AS W
AY
FOL
LIN S BA
Y ROA D
SOU
THW
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D RIV
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AYER
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RY L
ANE
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STRE
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ARD
S AV
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E
ALE
XAN
DER
DRI V
E
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BRANT ROAD
BA
Y VIE
W R
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HIG
HLA
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TREE
T
HIRA
M LAN
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PLE
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NT S
TREE
T
PINE
STR
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TH ER B
E D LAN
E
SIG
NE R
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DU
C K P O
ND R
O AD
RON
DA L
ANE
LO
N ETR
E E R
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LOMB ARDI HE
IGHTS
CA
RR R
OAD
INDI AN T RA
IL
HI CK ORY LA NE
FA R M H IL L
ROAD
KN
OX R
OAD
GOLD
FIN
CH L
ANE
BE
ACH
PLUM
LAN
E
KE LL EY S
P OND ROA D
TIMB ER LA NE
FE RRY ST RE E T
OLD FI SH
HOUS E ROAD
DAVE NP
OR T ROA D
AN N PAT H
FORES T HIL LS DR
I VE
NO
RTH
STR
EET
WIN
CHE
STER
DRI V
E
WILD WOO
D S TR EE T
AU
N T D
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S RO
A D
TO
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ROA
D
PA
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LAN
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TCH
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Y
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ROA
D
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TO R BO T
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O LOPH W
AY
WA
DES
WAY
CHA
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TREE
T
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N AV
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RRY
LAN
E
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OLD
HIL L
S ROA
D
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RVI E
W D
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CR
ANB
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LAN
E
HA WTH ORN STR EE T
DAN
VERS
LA N
E
TEA L C
IRCL E
PART RI
D GE LANE
ER
B DR
IVE
WEB F
OOT
P ATH
WH EA T
F IE LD LA NE
NA
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LL L
ANE
BE
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D
BR
AMB
L E LA
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LLIS
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D
SH
IRLE
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NUE
LA
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D LA
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PAS
TURE
PAT
H
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CLE
BASS RIV ER LA NE
COM
PASS
LA N
E
GAG
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ANE
FOLGE R
L AN E
HOW
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T
GOL F COURSE RO
AD
CAP
TAIN
PRE
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NS R
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DITH
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D
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CAPT
AIN
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STR
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BA
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Y
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AY
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LAN
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T
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MAR
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D
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MAP LE TER
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KN
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LAN E
CO
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RO
AD
TOB EY
H ILL DRIV E
CHEST NU
T LA NE
SM
ALLS
AVE
NUE
WE
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IND
DRIV
E
FID
DL E
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REEN
LAN
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A ZIN
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BA
MBI L
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MA
SHA
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RO
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SSAN
RO A
D
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HIDDE N
SHORES L A
NE
CAR
RIAG
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IVE
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RS L A
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PL
ASHE
S DR
IVE
BAY
VIEW
RO AD
BE
LLGR
OVE
ROA
D
RIVE RDA
LE NORTH
TR
IN ITY
DRI V
E
JUD S
ON W
AY
BL
UEB E
RRY
LAN
E
MO
NUM
ENT
VIEW
ROA
D
BE
ACH
HILL
S RO
AD
HOMER L ANE
TR
OTTE
RS L
ANE
FIELDS TO
NE DR
IVE
DU
C K P O
ND R
O AD E
XTE N
SION
PU
RITA
N LAN
E
AU
BUR
N RO
AD
SHA D B USH CIR
CL E
COU
NTR
Y CIR
CLE
SILV E
R LE AF L AN
E
GAT ES
P AT H
ASPEN
LANE
MY RT LE L ANE
ROCK Y
R IDG E
WHI TE HAV
E N WAY
FRA NK DO
Y LE ROAD
ST A FFO
R D CI RCLE
LA
UREL
RO A
D
CAN
NING
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RAC
E
OVE RL O
OK PL ACE
PH EA SAN T LA NE
BAK
ER WA
Y
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D WIN
ROA
D
BLE
AK H
OUSE
CIR
CLE
CANDL E
WOOD L ANE
MONRO
E WA Y
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HBA
NK C
ART
WAY
TH
E OT
HER
R OAD
LOH R
R OA D
COU
RIER
DR IVE
WOO
DCO
CK L
ANE
DALT
ON L
ANE
CO
VENT
RY W
AY
BAY
BERR
Y R
OAD
ALB
URM A
R RO
A D
JUDY D R IVE
MIL
L ERS
ROA
D
GOL DE
N ROD PA TH
SUP
REM
E WA
Y
GIL B ERT ROAD
OLD E
DE NNIS AP
PR OAC H
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VIA W
ALK E
R WA
Y
JOHN
LAN
E
KARE
N AV
ENU
E
ALLA
IN L
ANE
OLD
SALT
LAN
E
VE STER DRIV E
J H S EAR S
ROAD
AL
LEN R
OA D
SMITH S T REET
TRU
DY C
IRCL
E
PI NEFI EL D L ANE
DUN
ES R
O AD
TAM
ARA
CK RO
A D
JA
NET
ROAD
RA
M BLI
NG W
AY
MULL A LA NE
OL D C OU
N TY WAY
SC HO
ON ER R O
A D
DE E RFIE LD
R OAD
JOY
LAN
E
RIVER
SIDE W
AY
BE ACH VIE W
ROA D
MA ND
IGO RO
AD
SHIPMAT
E DRIVE
SP RUCE WAY
HEA T
H ERBE R RY
ROAD
CY PRUS ROAD
DO
C TO
R LO
RDS
ROAD
SOU
TH
ST
ANDI
SH W
AY
ELL
IOTT
DRIV
E
OL D SAIL OR S WAY
BR
IARF
IELD
ROA
D
MARGATE L AN E
QUAK E R B E ACH ROAD
RO
B ERT
ARTH
U R W
AY
BEA G
L E BY W
A Y
SOUTHOV
E R
PET
ER O
LIVER
ROA
D
YENO
M R
OAD
WIN G
L AN E
HE DGE ROA D
BLA
CKBE
RRY
LAN
E
GR
INDE
LL AV
ENU
E
IND
IAN
CHIE
F RO
A D
MILD
BAY
CIR
CLE
DO
U GLA
S SCO
T T W
AY
SC
H OFI
ELD R
OAD
OLDBU RY
P LACE
SIX
PEN
NY L
ANE
WIN
DY HI LL
FRE SH P
OND CI RCLE
WE S
TO V ER R
O A D
PRIMROS E S
T RE E T
TE
RRYS
LAN
E
MARKE T
PL ACE
AL BE RT ROAD
PO
ITICK
I RO
AD
GAR
DEN
LAN
E
FLA
KEY
ARD
ROA
D
GO
SLIN G
L AN E
CAP T
AIN K
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WAY
MA R LB ORO DRIV E
PO
R T W
AY
SALT
MEA
DOW
S R
OAD
MA
H ONE
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NE
WILL OWF O
RD R OA D
SEAF
IELD
RO A
D
HA
RBOR
WA
Y
WI ST ERIA L ANE
SASS
AFRA
SS R
OAD
EBEN
PAT
H
SE AGR OUE R O
A D
DEA
N R
OAD
WEN
DY W
AY
NA
THAN
IEL W
AY
LIT
TLE W
AY
JO
HNSO
N LA
NE
LUS CO
M BE LA
NE
CARL
ISLE
RO A
D
MI D I RON ROA D
CL
IN TO
N CI R
CLE
SU
SAN
W AY
EL
TON
PLAC
E
HOME A CRE S
CRO
FT PA
T H
SPA
DONI
WAY
RAN G
LEY
LA NE
GA GE S R
OAD
WE
BST
ER W
AY
VIR G
IN IA LA
NE
DOLPH
IN WAY
DE
BRA
WAY
CE NTE R S
T RE ET
UNNA MED
ROA D
LUS CO
MBE LA NE
MA IN S TREE T
NORTH STREE T
AIR L
IN E R O
A D
SEA
STR
EET
UNNA MED ROA D
UN
N AME
D RO
AD
UN
N AM
ED R
OAD
GA
GES
WAY
UNNA
MED
RO A
D
OL D CH
AT HA M ROA D
SC
HOO
L ST
REET
SO
UTH
STRE
ET
PAD
DOC
KS P
ATH
PAD
DOC
KS P
ATH
UNNA MED ROA D
UNN A
M ED R O
A D
COV
E R O
A D
UN N AMED R O
AD
UN
NAM
ED R
OAD
UN
NAM
ED R
O AD
POND ST
RE ET
RAMP
- RT 13 4 TO
RT 6 EB
ED
NA
195
4
1877
ES
TH
ER
19
61
GORDON 2000
CIN
DY
1959
JOSEPHINE 19961944
1879
1888
1938
1952
1889
1869
1923
HURRICANE, TROPICALSTORM AND EXTRA-TROPICAL WEATHER EVENTSIMPACTING DENNIS
20000 0 20000 40000 Feet
Town Property Lines 2007Road Names
Hurricane, Tropical Storm and Extra-Tropical Storm EventsExtra-TropicalCategory 1 HurricaneCategory 2 HurricaneTropical Storm
SOURCE: National Weather Service
EROSION
Erosion and Sedimentation
Erosion
Erosion
BLIZZARD
BLIZZARD
WILD FIRE
WILD FIREWILDLAND FIRE PROTECTION AND PREPAREDNESS
PLAN FOR PLASHES CONSERVATION AREA AND SURROUNDING OPEN SPACE TRACTS;
WILDLAND FIRE PROTECTION AND PREPAREDNESS PLAN FOR RALPH AND FLORENCE SHOOP
MEMORIALWILDLAND FIRE PROTECTION AND PREPAREDNESS
PLAN FOR GREEN BELT WELL FIELD;WILDLAND FIRE PROTECTION AND PREPAREDNESS PLAN FOR PRINCESS BEACH CONSERVATION AREA
AND ADJACENT SCARGO HILL
SEA LEVEL RISE
SEA LEVEL RISE
HAZARD MAPPING
Natural Hazard Likelihood of Occurrence(i.e. highly, likely, possible, unlikely)
Location (i.e. local or small, medium or regional, multiple communities or large)
Impacts (i.e. catastrophic, critical, limited, negligible)
Flood-Related Hazards
Riverine Possible Swan River, Bass River, Sesuit Creek, Chase Garden Creek
Limited
Coastal High West Dennis, Dennisport Critical
Erosion High Chapin Beach, West Dennis Beach Critical
Northern Coastline Limited
Southern Coastline Limited
Dam Failures Unlikely Local Negligible
Thunderstorms High Small Limited
Winter Storms High Regional Critical
Coastal Storms or nor’easters High Regional Critical
Hurricanes Possible Large Critical
Wind-Related Hazards
Hurricanes Possible Large Critical
Coastal Storms High Regional Critical
Winter Storms High Regional Critical
Downspouts Possible Small Limited
Tornadoes Possible Small Critical
Fire-Related Hazards
Drought Possible Medium Limited
Wildfires Likely Local Limited
Urban Fires Possible Local Critical
Flooding Possible Local Limited
Geologic Hazards
Earthquakes Unlikely Local Negligible
Landslides Possible Small Limited
Sink holes Possible Small Limited
Other Hazards
Regulatory Tools (ordinances, codes, plans)
Status
Building code State Building Code
Zoning ordinance First Adopted 1951
Subdivision ordinance or regulations Last Amended 1993
Special purpose ordinances (floodplain management, stormwater management, hillside or steep slope ordinances, wildfire ordinances, hazard setback requirements)
Floodplain Management: Zoning and Wetlands Regulation; Stormwater: Town By-law; Hazard Setback: Zoning By-law and Wetlands Regulation; Hillside or Steep Slope: Crowe’s Pasture only; Wildfire: none
Growth management ordinances (also called “smart growth” or anti-sprawl programs)
Village Centers adopted, land acquisition
Site plan review requirements Planning Board conducts Site Plan Review
Comprehensive plan Adopted 2002, under revision
A capital improvements plan Somewhat
An economic development plan As part of Comprehensive Plan
An emergency response plan Yes, maintained by Police and Fire Dept.
A post-disaster recovery plan No
Real estate disclosure requirements No
Section §201.6(c)(2) Requirement Multi-Jurisdictional Hazard Mitigation Plan Where it is Addressed in Plan
Identifying Hazards §201.6(c)(2)(i) The risk assessment shall include a description of the type . . . of all natural hazards that can affect the jurisdiction . . .
Section 2, identifies severe weather (hurricanes, blizzards, thunderstorms and tornadoes), wildfire, and erosion as natural hazards to be profiled in the Dennis MHMP.
Profiling Hazards §201.6(c)(2)(i) The risk assessment shall include a description of the . . . location and extent of all natural hazards that can affect the jurisdiction. The plan shall include information on previous occurrences of hazard events and on the probability of future hazard events.
Section 2, Risk Assessment, includes hazard-specific sections in the. The MHMP profiles the natural hazards that may affect the area. The MHMP includes location, extent, probability, impact and previous occurrences for each natural hazard identified. .
Assessing Vulnerability: Overview §201.6(c)(2)(i) The risk assessment shall include a description of the jurisdiction’s vulnerability to the hazards described in paragraph (c)(2)(i) of this section. This description shall include an overall summary of each hazard and its impact on the community.
Section 3, Assessing Vulnerabilities contains overall summaries of each hazard and the impacts on the community are contained in each hazard specific section in Section 3.3.
Assessing Vulnerability: Addressing Repetitive Loss Properties §201.6(c)(2)(ii) The risk assessment in all plans approved after October 1, 2008 must also address National Flood Insurance Program (NFIP) insured structures that have been repetitively damaged floods.
The Town of Dennis participates in the NFIP, Repetitive Loss information is provided to the extent feasible given privacy concerns.
Assessing Vulnerability: Identifying Structures §201.6(c)(2)(ii)(A) The plan should describe vulnerability in terms of the types and number of existing and future buildings, infrastructure, and critical facilities located in the identified hazard areas.
Section 3.2, identifies critical facilities located in the profiled hazard areas.
Assessing Vulnerability: Estimating Potential Losses §201.6(c)(2)(ii)(B) The plan should describe vulnerability in terms of an estimate of the potential dollar losses to vulnerable structures identified in paragraph (c)(2)(ii)(A) of this section and a description of the methodology used to prepare the estimate.
Section 3.6, estimates potential dollar losses to vulnerable structures.
NATURALHAZARD
CAUSE & EFFECT LOCATION
FLOOD Natural Inundation in the floodplain(caused by coastal storms; winter storms;northeasters; hurricanes)Coastal Flooding
Episodic Erosion River Flooding
Pond Flooding
Infrastructure FailureSiltation Infrastructure Failure (caused by coastal storms; winter storms; northeasters; hurricanes; ice/snow melt)Bridge Failure Storm Drain FailureCulvert FailureDam FailureDike Failure
Areas of Coastal Flooding • West Dennis Beach • Chapin Beach• Mayflower Beach • North Side Marina• Haigis Beach • South Village Beach• Glendon Road Beach • Sea Street Beach• Cold Storage Beach • Sea Street Beach• Corporation BeachAreas of River Flooding • Upper County Road Bridge over the Swan River• Bass River Marina • Mayfair BoatyardAreas of Episodic Erosion • Mayflower Beach • Chapin’s Beach• Crowe’s Pasture • West Dennis BeachAreas of Episodic Siltation • Sesuit Harbor • Bass River• Swan River • Chase Garden CreekDeficient Infrastructure• Upper County Road Bridge over the Swan River• Route 28 Bridge over Swan River
WIND Hurricanes Northeasters TornadoesRoofs Blowing Off Trees Downed
Roof Damage • Town Hall • Ezra Baker School• Nathaniel Wixon School • Dennis Memorial Library• Dennis Public Library • Town wideTrees Downed - Locations proximal to wind activity:Town wide
FIRE Drought Wildfire Lightening StrikesUrban Fire
Wildfire Developed land / forested area interfaces:• Crowes Pasture• Princess Beach/Scargo Hill• Old Chatham Rd Water District Lands• The Plashes• Shoop GardensUrban Fire• Dennisport Village Center is blessed with many old buildings placed close together. The Village was the scene of a major urban fire in the 1920’s which destroyed an entire block. Construction standards of the 1920’s do not match modern fire safety standards, leaving this area once again at risk of an Urban Fire.• West Dennis, while not as compact as Dennisport shares many of the same urban fire concerns. The older portions of town still bear resemblance to the original village settlement with shared, wood, walls. This area is at significant risk should a fire begin in one of these older connected structures.
GEOLOGIC Earthquakes Landslides Sink Holes
Structural Damage - Locations proximal to seismic activity: According to Regional Hazard Risk Map II geologic activities have not been recorded. Loss of LandDennis, as is all of Cape Cod, is a sandbar. There is always significant risk to the town due to coastal erosion. Some portions of town have experienced significant areas of erosion over the town’s history. Major storms, such as the Blizzard of 78 vastly altered the coastline. Lesser storms, including a Northeaster in June of 2009 also have had significant impacts. Barrier Beach erosion at places like West Dennis Beach or Chapin’s Beach could severely affect the lands behind these barrier beaches.Wave InundationDennis has several areas protected by barrier beaches. These barrier beaches protect lands in Dennis, Yarmouth and Brewster from normal wave action. These barrier beach areas are at risk both to wind erosion as well as wave inundation. All three barrier beaches in town, West Dennis Beach, Chapin’s Beach and Crowe’s Pasture are all considered to be located within velocity zones and would be exposed to tremendous wave action and could be totally inundated in a 1% storm event.
Table 12: Vulnerable and Evacuating Populations
Population
Population Vulnerable Population**
Census
Permanent
Seasonal Total Permanent
Seasonal Total
2000 15,973 37,475* 53,488* 5,087 11,935* 17,022*
*Information derived from the GIS layers as maintained by the Dennis Planning Dept., U.S. Census Block Group Data, Assessors Information on Residential Units, Motel Units and Seasonal Cottages..
Table 14: Repetitive Flood Losses (current through Dec. 2002)
Information provided by MEMA 1/14/04; 2003 data not yet available
VILLAGE LOSSES PAID TYPE FLOOD ZONE
East Dennis 3 $11,216.97 Single Family A3 (EL 11)
West Dennis 3 $11,373.15 Single Family V13 (EL 13)
Dennisport 2 $5,142.15 Single Family A8 (EL 10)
West Dennis 2 $18,090.41 Single Family V13 (EL 12)
West Dennis 2 $3,240.00 Single Family A11 (EL11)
West Dennis 2 $55,925.15 Single Family V13 (EL 13)
Dennisport 3 $31,379.70 Other Residential V13 (EL 15)
Dennisport 2 $9,634.74 Other Residential V13 (EL 13)
Dennisport 2 $26,335.25 Single Family A11 (EL 11)
West Dennis 4 $66,506.24 Condo V13 (EL 12)
West Dennis 2 $32,603.71 Single Family V13 (EL 13)
West Dennis 2 $9,158.65 Single Family V13 (EL 12)
West Dennis 2 $12,917.80 Single Family A11 (EL 11)
West Dennis 2 $12,980.73 Single Family V13 (EL 13)
Dennisport 2 $9,716.94 Single Family
Dennisport 4 $108,882.36 Single Family V8 (EL 15)
TOTALS 39 $425,103.95
POTENTIAL LOSSES
• Flooding $494 million to $1.04 billion
• “Urban” Wild Fire– Dennisport Village $3.1 million– West Dennis Village $1.5 million– Cottage Colony Area $23.9 million
Existing Protection Description Area Covered Enforcement and/or Effectiveness
Flood Plain Zoning – Section 6 Floodplain District
Floodplain Compliance RegulationsAs designated by the Flood Insurance Rate Map (FIRM) for the Town of Dennis, Community #
250005 (Zones A’s & V’s)Building Commissioner
Local Wetlands Protection Bylaw
Regulates development within wetland resource areas including Special Flood Hazard Areas
Wetland Resource Areas Conservation Commission
Beach Maintenance Program Raking and cleaning beaches of debris Town BeachesDepartment of Public WorksBeach and Recreation Dept.
Comprehensive Management Emergency Plan
Provides a framework wherein the community can plan and perform respective emergency functions during a disaster or emergency situation on the local, state or national level.
Town wide Local Emergency Planning Committee
Storm Water By-lawProvides for proper storm water system design
to control volume and rate of storm water run-offTown wide
Building Commissioner with review by Engineering Department (Adopted October
2009)
Subdivision RegulationsRequires utilities to be placed underground, drainage
designed in accordance with town Storm Water By-lawResidential and Commercial Districts Planning Board
Site Plan ReviewReview of development projects for storm water control in
accordance with Storm Water by-lawCommercial Districts Planning Board
Wildfire Assessment & Preparedness Program
County grant program to reduce wildfiresShoop Community Gardens, Princess
Beach/Scargo Hill, The Plashes, Water District Greenbelt Area
Barnstable County Cooperative Extension Service, Fire Department Dept of Natural Resources & Conservation Commission
Dock Regulations 100 Year Floodplain Areas as designated by FIRM Conservation Commission
National Flood Insurance Program (NFIP)
Federally backed flood insurance available to homeowners, renters & businesses
100 Year Floodplain Areas as designated by FIRM FEMA / Building Commissioner
Building Permits Building Code Enforcement Building Commissioner
Barrier Beaches ManagementManagement Plan for the protection and nurturing of the
three Barrier Beaches in Dennis.Chapin Beach, West Dennis Beach, Crowe’s
PastureBarrier Beach Committee (est. Aug. 4, 2009)
Land Acquisition Acquisition of critical land areas for resource management. Town-WideCommunity Preservation Committee, Dennis
Conservation Trust
Quivet Neck/Crowe’s Pasture Resource Protection District
Special Zoning to protect the Quivet Neck/Crowe’s Pasture Resource Protection Area from inappropriate development.
Quivet Neck and Crowe’s Pasture in north east Dennis
Planning Board, Building Commissioner
Environmentally Sensitive Area Waste Water Requirements
Ensures proper design of septic systems located in areas designated as environmentally sensitive (high water table,
proximity to wetlands, flood zones)
Areas with high water tables, proximate to wetlands, or located within flood zones
Board of Health, Conservation Commission
HAZARD
Flood (coastal storm surge, storm tides & wave action, erosion, and sea level rise)
PREVENTION
ACTION/TIMEFRAME SCORE
Land Acquisition within floodplain/Ongoing. 52
SOCIAL
COMMUNITY ACCEPTANCE
The town has adopted the Community Preservation Act and has used this funding source and state grants to acquire properties through-out town. The funds have been used within the floodplain along Swan Pond River, Quivet Creek, Sesuit Creek, Chase Garden Creek and Bass River.
3
EFFECTS ON SEGMENT OF POPULATION
The land acquired to date, except for one instance, has all been vacant land. The acquisition of vacant land that is subject will not displace homeowners and will provide flood storage for nearby properties.
3
TECHNICAL
TECHNICAL FEASIBIITY
Land acquisition has been accomplished on many sites in town and remains a feasible alternative. 3
LONG TERM SOLUTION
Land Acquisition of flood prone properties provides for permanently protected lands, preserving these areas from ill advised construction and providing long term flood management. 3
SECONDARY IMPACTS
Land is removed from the Dennis Tax Rolls, thereby increasing the tax load on other properties 1
ADMINISTRATIVE
STAFFING
The town has limited staffing to maintain existing town land holdings. In that lands taken for flood prevention may not impose a tremendous burden on town staff, passive acquisitions do not pose the staffing issues that may go along with active open areas.
1
FUNDING ALLOCATED
The Community Preservation Funds have been committed to a number of open space projects. Funding is presently limited, however the funding is dedicated to open space, historic preservation and affordable housing, and provides a long term dedicated funding stream.
2
MAINTENANCE OPERATIONS
Maintenance (picking up litter) will be an issue on any empty parcel. 1
POLITICAL
POLITICAL SUPPORT
In the past questions have been raised about acquiring flood zone properties. Questions have arisen as to what level of benefit was the town receiving from acquiring properties which provided “limited” public benefits. There have been greater levels of support for properties which can support public access and recreational uses.
2
HAZARD
Flood (coastal storm surge, storm tides & wave action, erosion, and sea level rise)
LOCAL SUPPORT
The town leaders have generally supported land acquisitions 3
PUBLIC SUPPORT
Town Meeting has supported land acquisitions 3
LEGAL
STATE AUTHORITY
State law authorizes the town to acquire property. 3
EXISTING LOCAL AUTHORITY
The town is authorized to acquire property and has adopted the CPA for such acquisitions. 3
POTENTIAL LEGAL CHALLENGE
The town only acquires land from willing sellers, no eminent domain proceedings are contemplated 3
ECONOMIC
BENEFIT OF ACTION
Land is acquired for flood storage, thereby protecting adjacent properties from flooding and preventing structures from being built on flood prone properties. 3
COST OF ACTION
Varies by site. 2
CONTRIBUTES TO ECONOMIC GOALS
The protection of the flood prone areas from inappropriate development protects scenic vistas of the town, preserving views that attract tourists to the town. 3
OUTSIDE FUNDING REQUIRED
Yes, as match for local funds 1
ENVIRONMENTAL
EFFECTS ON LAND/WATER
Protects land and water. 3
EFFECTS OF HAZMAT WASTE SITES
None 1
CONSISTENT WITH COMMUNITY ENVIRONMENTAL GOALS
Yes 3
CONSISTENT WITH FEDERAL LAWS
Yes 3
Implementation and Adoption of this Plan
• Process: Adoption By the Board of Selectmen after a Public Hearing
• Public Hearing December 7, 2009 by Dennis Planning Board
• Ongoing Monitoring• Annual Progress Reports• Updates – 5 year mandatory, also required
after declaration of emergency or as recommended by Board of Selectmen