Haver
you
S A Y!
Our river, our town,
OUR FUTURE
PROTECTION
Council is seeking your feedback on the options to provide flood protection
for Westport. This is the chance to have your say.
A
Do nothing
LEGEND
Flood Relief Cut
Stopbank
Floodwall
Raised Bund
Flood Depth (m)
LEGEND
Extreme
Significant
Moderate
Low
Map of the proposed works with an overlay of how flooding would be
reduced in a 1% AEP* event for Option A.
Map showing the hazard risk as a result of a 1% event for Option A. The hazard
risk is based on both depth of water and its velocity, or speed of water flow.
This option considers doing nothing, maintaining the status quo.
A 2% AEP event has the potential to cause $38m in damages. For a 1% AEP event, the cost of
damages would increase to $114m.
*AEP (Annual Exceedance Probability) is the chance of a flood event occurring annually expressed as a percentage. Bigger rainfall events occur (are
exceeded) less often and will therefore have a lesser annual probability.
Have
your
Pros and Cons
S A Y!
Pros
• No upfront costs
• No false sense of security created
Your
feedback
is needed
Cons
• Potential for loss of life
• Large floods will cause significant damage
• Extensive evacuations likely, at least temporarily, and
potentially for longer periods of time
The Council is seeking your
feedback to understand
which of the six options you
prefer. It is really important
that we hear from you.
The feedback received
will help us determine the
next steps in this process
– working out which
option(s) to discuss with
the community further.
• Flooding is likely to become more common as sea
levels rise
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OTECTION
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N
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C
Have
your
Have
your
SAY!
Council is seek
ing your feed
back on the
for Westport.
options to prov
Council is seek
This is the chan
ide flood prot
ing your feed
ce to have your
ection
back on the
for Westport.
say.
options to prov
This is the chan
ide floo
ce to have your
say. Combin d protection
Council is seek
Flood relief
ing your feed
back on the
for Westport.
cut to sea fro
options to prov
This is the chan
m
ide flood prot
ce to have your
ection
Council is seek
say.
ing your feed
back on the
for Westport.
Par
tial stopba
options to prov
This is the chan
ide flood protnks and
ce to have your
floodw
ection
say.
B
ed stopbanks
Orowaiti Lag
oon
all
Extensive flo
odwalls
with Orowa
iti cut
Council is seek
ing your feed
back on the
for Westport.
options to prov
This is the chan
ide flood prot
ce to have your
ection
say.
F
Partial sto
pbanks wit
h Orowaiti
How do I
provide
feedback?
cut
LEGEND
Flood Relief
Flood Relief
Stopbank
Floodwall
Raised Bund
LEGEND
Flood Depth
Flood Relief
Cut
Stopbank
Flood Relief
Cut
Flood Depth
(m)
Stopbank
Floodwall
(m)
Raised Bund
Flood Depth
LEGEND
(m)
Extreme
Significant
LEGEND
Extreme
Map
of the propose
d works with
reduced
an overlay of
Significant in a 1%
how flooding
AEP* event for
would be
Option E.
Moderate
Low
Map showing
the hazard risk
Map of the propose
Option E comb
as a result of
risk is based on
d works with
Low
a 1% event for
reduced in a
ines
both depth of
an overlay of
LEGEND
Option E. The
1% AEP* event
water and its
how flooding
floodwalls, essen both Options B and D.
hazard
velocity, or speed
for Option D.
would be
LEGEND
It involves const
Flood Relief
of water flow.
Map showing
Cut
ring-banking
adjacthe hazard risk as a tially
ructin
Option DExtreme
g a series of
the main town
risk is based onent to Snodg
result
Stopbank
considers makin
a 1% event for
rassofRoad
both depth of
stopbanks and
of Westp
Option D. The
Significant
water and its
and the
through
g a cut throu
allow water
concrete
hazard
Floodwallort, as well
the dune
rs
gh the dune
as protecting
speed ofCarte
Beach comm
to exit to the
systemvelocity,
water flow.
fromorthe
system
the land
quick
unity,
sea more
415,0 Moderate
Raised
Raised Bund
Raised Bund
Flood Depth
(m)
Floodwall
Cut
Moderate
Floodwall
LEGEND
Cut
Stopbank
LEGEND
Map of the propose
ly durin
from
3
Orowaiti Lagoo
Bund in conjunction
00m
quick
the Orow
g a flood
d works with
Low of material
aiti Lagoo
with making
nFlood
event.n in
in Depth
reduced
order
LEGEND in a 1%
to be excavated. ly during a flood event
an overlay of
(m) to allow
a cut
order to
how flooding
AEP* event for
water to exit
This Option
The cut would *AEP (Annual.Exceeda
would be
Extreme
Option C.
requires
to the sea
Map showing
*AEP (Annual
nce Probabi
be
LEGEND
Extreme
appro
approximately
exceede
more
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Significant
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e have a lesser a flood event occurring
chance
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Moderate
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const
of water
therefor
annually expresse
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The hazard
and aitslesser
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at the
lity. Map of the propose
d as a percenta
Map of the propose
g annually expresse
or speed
annual
top end of the ructing stopbanks along
of water
d works
probabi
Low
ge. Bigger rainfall
d works with
with an overlay
lity. flow.
d as a percenta
Low
reduced in a
the banks of
reduced in a
an overlay of
events occur
1% AEP* event
ge. Bigger rainfall
of how flooding
Beac
1% AEP* event
how flooding
h community Orowaiti overflow path.
for Option F.
the Buller River
would be (are
events occur
for Option B.
would be
(are
Map showing
.
It also inclu
Map showing
as well as
the hazard risk
the hazard risk
des protection
as a result of
Option B invol
risk is based on
Option F comb
as a result of
risk
a 1% event for
is based
both depth of
of the Carte
*AEP
a 1% event for
onExceeda
ves constructin
both depth of
(Annual
Option F. The
ines both Optio
water and its
Option B. The
water and its
rs
hazard
nce Probabi
velocity, or speed
exceeded) less
ring-banking
hazard
g a series of
Buller
ns
velocity,
lity)
C
is
and
River
or
the
of water flow.
D.
as well as at
stopbanks and often and will therefore have chancespeed
of water flow.
the main town
of a flood
the top end of It involves constructing
Beach comm
concrete flood
a lesser annual event occurring annuall
of
Road and the
stopbanks along
y expressed
the Orow
probabi
unity,
Carters Beach Westport, as well as prote
walls, essen
as a percenta
the banks of
ge. Bigger rainfall
Lagoon in order in conjunction with makin aiti overflow path, with
tially lity.
cting the land
community.
the
events occur
protection of
to allow water
g a cut throu
adjacent to Snod
(are
*AEP (Annual
the Carters
gh
Exceedance
to
the
exit
grass
dune system
to the sea more
*AEP (Annual
Probability)
exceeded) less
Exceeda
is the
often and will
chance of a
flood
therefore have
a lesser annual event occurring annuall
y expressed
probability.
as a percenta
ge. Bigger rainfall
exceeded) less
often
events occur
(are
from the Orow
nce Probabi
quickly durin
lity)
aiti
g a flood event
and will therefor is the chance of a flood
event occurrin
.
e have a lesser
g annually expresse
annual probabi
lity.
d as a percenta
ge. Bigger rainfall
events occur
(are
There are 5 other options to consider
Below is a guide as to what the options would cost properties within
the affected area. The costs are estimated based on information
collected through QV. Note that all loan amounts are calculated at 5%
interest over 20 years and having one rating class over the rated area.
Loan amount
Annual repayment per $100,000 capital value
$10M
$132
$5M
$66
$2M
$26
You can download a
feedback form from
www.wcrc.govt.nz/floodoptions.
Just fill it in, fold, secure, and
freepost back to us.
Alternatively your feedback
can be emailed to
[email protected] or
submitted via the online form.
For example, an option costing $5M on a $200,000 property will result in
an additional $132 being paid annually in rates.
388 Main South
Road, Paroa PO Box 66,
Greymouth 7840
Feedback must be
received by the
Regional Council by
Friday 17 February
2017.
freephone: 0508 800 118 phone: 03 768 0466 email: [email protected]
www.wcrc.govt.nz