Lake Cathie Coastline Management Study - Stage 2 Report

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Alison Kennedy BONNY HILLS NSW 2445 400m Revetment protection Revetment will protect and enhance the aesthetic qualities of the beach. An 'engineered' revetment structure is considered a lower aesthetic
for Illaroo Road
value than a natural coastline system.
Alison Kennedy BONNY HILLS NSW 2445 Revetment will protect and improve the natural environment. A revetment replaces a natural shoreline with an artificial shoreline.
There are implications for other ecological communities as a result of
revetment. Refer to Lake Cathie CMS Table 7.1 for likely impacts on
the natural environment.
Alison Kennedy BONNY HILLS NSW 2445 Dredge lake west of the bridge. Council has carried out hydrological modelling to examine estuary
related matters. Dredging west of the Ocean Drive Bridge is
constrained by; ecological impacts (e.g. seagrass beds); legislative
barriers to dredging (i.e. Lake Cathie and Cathie Creek are within a
nature reserve subject to the provisions of the National Parks &
Wildlife Act 1994); sediment compatibility issues (i.e. sediments would
not be entirely of marine origin) etc. In addition, Council’s resolution of
the 27 July 2011, limits dredging to downstream of the Ocean Drive
Bridge.
Alison Kennedy BONNY HILLS NSW 2445 Revetment will stabilise the dune and prevent further destruction. The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. Revetment would protect areas landward of the structure.
Alison Kennedy BONNY HILLS NSW 2445 Risk reduced with revetment as opposed to letting artificial debris fall into the
ocean.
Artificial debris would be removed prior to collapse or destruction.
Alison Kennedy BONNY HILLS NSW 2445 How can council make conclusions without funding availability. Council has not made any final decisions. The funding options are
outlined in Lake Cathie CMS section 7.2 and will need to be confirmed
as part of the CZMP.
Alison Kennedy BONNY HILLS NSW 2445 More detail for buy back option. Management studies identify likely option impacts. Prior to
implementation of a preferred option, further detailed assessment
would be required. In the case of a built option, this would include
detailed design and an environmental impact assessment. In the case
of planned retreat it may include a socio-economic impact statement.
Alison Kennedy BONNY HILLS NSW 2445 A Social Impact Assessment should be undertaken. Management studies identify likely option impacts. Prior to
implementation of a preferred option, further detailed assessment
would be required. In the case of a built option, this would include
detailed design and an environmental impact assessment. In the case
of planned retreat it may include a socio-economic impact statement.
Anthony Thorne
Anthony Thorne
PO Box 243 PORT
MACUARIE NSW 2444
PO Box 243 PORT
MACUARIE NSW 2445
NA More investigation into revetment is needed. Further studies, detailed design and an environmental impact
assessment would be required, if this was the adopted management
strategy.
Loss of beach amenity is applied only to Revetment why not the other options.
Other built options include a cost for nourishment to maintain the
beach width.
Page 1 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Anthony Thorne PO Box 243 PORT
Disputes 1.5 Cost Benefit Analysis methodology.
Costs and assumptions for the benefit-cost analysis are set out in
MACUARIE NSW 2446
Lake Cathie CMS Table 7.1.
Anthony Thorne
Anthony Thorne
PO Box 243 PORT
MACUARIE NSW 2447
PO Box 243 PORT
MACUARIE NSW 2448
Underestimates the cost of planned retreat on the residents ($15,000 payment). Refer to Lake Cathie CMS Section 4.4 and Lake Cathie CMS Table
4.1 which sets out costs considered.
Funding options should be investigated further.
The funding options identified are suitable for options analysis.
However the Coastal Zone Management Plan (CZMP) will include
further detail of funding for the preferred management strategy and
the steps that will need to be taken to implement the CZMP.
Bart Benschop CLAREMONT WA 6010 NA Engineered structures do not work. Lake Cathie CMS Section 8.1.3 indicates that, "Of the engineered
options considered, only the construction of a properly designed
revetment provides certifiable protection from erosion events. Beach
nourishment and groyne(s) rely in some way on modifying coastal
processes such that the risk is reduced".
However, it is acknowledged that revetments have problems. The
SMEC report details problems with revetments including increased
erosion. The impact of revetments/seawalls on a receding coastline
are well known and is evident at other structures. It is also
acknowledged in the Draft NSW government guidelines for assessing
the impacts of seawalls (DECCW 2010) which includes measures to
mitigate erosion impacts.
Bart Benschop CLAREMONT WA 6010 Techniques used in Netherlands work best. The Coastal Zone Management Plan (CZMP) will include further detail
of the preferred management strategy and the steps that will need to
be taken to implement the CZMP including detailed design options.
Bart Benschop CLAREMONT WA 6010 Plant deep rooted vegetation and use mats to collect sediment and stabilise
soil.
Bart Benschop CLAREMONT WA 6010 SMEC have no experience in coastal erosion because its not studied at
Australian universities.
During extreme events vegetation provides little resistance to erosion.
Disagree. SMEC are professional coastal engineers. The Coastline
Management Study (CMS) Stage 2 was reviewed by NSW
government coastal specialists.
Bart Benschop CLAREMONT WA 6010 Delft Uni is the only place that can do erosion studies. There are a number of qualified consultants that carry out coastal
erosion studies
Beth Delamotte GUNNEDAH 2380 400m Revetment protection Other houses further back will be jeopardised if no revetment is built.
Coastal erosion impacts are shown in the Hazard Study report.
for Illaroo Road
Bill Watson LAKE CATHIE NSW 2445 NA Review Vehicles on Beaches policy Not a matter for the CZMP
Bill Watson LAKE CATHIE NSW 2445 Investigate the feasibility of re-establishing zones of grasses. Native coastal revegetation will occur, however will be consistent with
the ultimate preferred option. However, during extreme events
vegetation provides little resistance to erosion.
Bill Watson LAKE CATHIE NSW 2445 Review beach access arrangements. This will be undertaken as part of the CZMP.
Bill Watson LAKE CATHIE NSW 2445 Close beach access points. This will be undertaken as part of the CZMP
Page 2 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Bill Watson LAKE CATHIE NSW 2445 Review aerial spraying procedure. All spraying is conducted in accordance with licences for the control of
Bitou Bush under the threat abatement plan.
Brad Farr
PORT MACQUARIE NSW
2444
Planned retreat including
acquisition/voluntary
purchase
Revetment will cause further erosion of the beach.
The SMEC report details problems with revetments including
increased erosion. The impact of revetments/seawalls on a receding
coastline are well known and is evident at other structures. It is also
acknowledged in the Draft NSW government guidelines for assessing
the impacts of seawalls (DECCW 2010) which includes measures to
mitigate erosion impacts.
Brad Farr
PORT MACQUARIE NSW
2444
Brad Farr
PORT MACQUARIE NSW
2444
Brad Farr
PORT MACQUARIE NSW
2444
Brian Tobin LAKE CATHIE NSW 2445 Multiple Selection
(Revetment + Beach
Nourishment)
Revetment will need to be maintained for extended period.
Beach nourishment is a commitment for the life of the revetment wall.
Decision should not be made on emotion.
No comment on the health and wellbeing of the affected residents.
Options include maintenance costs.
The revetment option would need ongoing beach nourishment to
mitigate negative beach amenity effect.
Council will consider all information and submissions before making a
decision.
Management studies identify likely option impacts. Prior to
implementation of a preferred option, further detailed assessment
would be required. In the case of a built option, this would include
detailed design and an environmental impact assessment. In the case
of planned retreat it may include a socio-economic impact statement.
Dianne Henry LAKE CATHIE NSW 2445 Planned retreat including
acquisition/voluntary
purchase
Concerned about loss of beach amenity if revetment is built.
The SMEC report details problems with revetments including
increased erosion. The impact of revetments/seawalls on a receding
coastline are well known and is evident at other structures. It is also
acknowledged in the Draft NSW government guidelines for assessing
the impacts of seawalls (DECCW 2010) which includes measures to
mitigate erosion impacts.
Dianne Henry LAKE CATHIE NSW 2445 "Foreverness" of revetment. The SMEC report details problems with revetments including
increased erosion. The impact of revetments/seawalls on a receding
coastline are well known and is evident at other structures. It is also
acknowledged in the Draft NSW government guidelines for assessing
the impacts of seawalls (DECCW 2010) which includes measures to
mitigate erosion impacts.
Dianne Henry LAKE CATHIE NSW 2445 Many people in Lake Cathie not aware of the issue. Council wrote to all property owners in the Lake Cathie village to raise
awareness and also held an Information Day at the Community Hall.
Donna Givan MARCOOLA QLD 4564 400m Revetment protection
for Illaroo Road
Revetments work all around the world.
The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts.
Emma Smith
BAULKHAM HILLS NSW
2153
400m Revetment protection
for Illaroo Road
Wants home to be there in the future.
Council will consider all information and submissions before making a
decision.
Page 3 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Fiona Stewart LAKE CATHIE NSW 2445 400m Revetment protection Consider the local community.
Council will consider all information and submissions before making a
for Illaroo Road
decision.
Gareth Livingston LAKE CATHIE NSW 2445 400m Revetment protection
for Illaroo Road
Bias towards Planned Retreat.
Assumptions etc were applied consistently in the assessment of all
options. Refer to Lake Cathie CMS Section 7.
Gareth Livingston LAKE CATHIE NSW 2445 Overlooks residents knowledge of the area. Comment seems to relate to the feelings of the community on what
option they would like to see. This is the purpose of a public exhibition
and seeking submissions on the Management Study Stage 2.
Gareth Livingston LAKE CATHIE NSW 2445 Cost Benefit Analysis methodology wrong. Costs and assumptions for the benefit-cost analysis are set out in
Lake Cathie CMS Table 7.1.
Gareth Livingston LAKE CATHIE NSW 2445 Disputes beach value figure and methodology used. It is not possible to provide a direct value for Lake Cathie Beach,
unlike the cost/value of a structure. Studies using travel cost and
'willingness to pay' methodologies to derive a value for a beach or
maintenance of a beach width were used to estimate a value for Lake
Cathie Beach. These methods do not take into account existence
values, value to future generations or ecological/ habitat values.
Gareth Livingston LAKE CATHIE NSW 2445 Beach loss is determined by weather patterns not whether a revetment exists. The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts.
Gareth Livingston LAKE CATHIE NSW 2445 Double costing of dredging Lake Cathie. The report sought to highlight relevant costs for each option so that a
comparison could be undertaken.
Council provided additional clarification in the Frequently Asked
Questions (FAQ) sheet as follows: Council’s dredging strategy
includes provision for the dredging of Lake Cathie east of the Ocean
Drive bridge on a 5-10 year basis. While the ongoing works are not
guaranteed and are not currently funded under Council’s budget,
Council would consider beach nourishment works in combination with
future dredging should such an option be adopted.
Gareth Livingston LAKE CATHIE NSW 2445 Not having to remove services is a saving to rate payers and is not included in
Cost Benefit Analysis.
In the Lake Cathie CMS Section 7.1.3 the value of services at risk,
(water mains, power lines, roads etc.) associated with properties at
risk has not been costed (apart from the short-term services relocation
option) because, although these assets may be lost due to shoreline
recession they would no longer be required to service private
residences and conversely, if works were undertaken to protect
property, services and roads would also be protected.
Page 4 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Gareth Livingston LAKE CATHIE NSW 2445 Dunes cannot be restored within given timeframe whereas revetment will save
the dune.
A revetment replaces a natural shoreline with an artificial shoreline.
The impact of revetments/seawalls on a receding coastline are well
known and is evident at other structures. It is also acknowledged in
the Draft NSW government guidelines for assessing the impacts of
seawalls (DECCW 2010) which includes measures to mitigate erosion
impacts. Refer to Lake Cathie CMS Table 7.1 for likely impacts on the
natural environment.
Gareth Livingston LAKE CATHIE NSW 2445 Nourishment may not even be necessary. Lake Cathie CMS Appendix D which shows nourishment volumes to
take account of shoreline recession due to sediment loss and sea
level rise. The amount of nourishment will depend on the prevailing
conditions in the future.
Gareth Livingston LAKE CATHIE NSW 2445 Loss of rates not included in financial estimate for planned retreat. Council provided additional clarification in the Frequently Asked
Questions (FAQ) sheet as follows: On the basis of 2011/12 rates for
17 properties along Illaroo Road Council’s general fund rate revenue
would be reduced by $1.31M over a 50 year period if all properties
were acquired in year 1. There would be a loss of general rate income
of $0.7M if properties were acquired on the basis of 1 ever 3 years.
Gareth Livingston LAKE CATHIE NSW 2445 Hazard lines do not take into account other properties and assets. Lake Cathie CMS section 7 indicates the 2050 and 2100 hazard lines
will be periodically revised over the next 50 years based on further
data.
Gareth Livingston LAKE CATHIE NSW 2445 Funding is more likely for protection options rather than retreat options. Funding assistance is more likely to be given to projects that address
public safety, public assets, and or maintain environmental values.
Gareth Livingston LAKE CATHIE NSW 2445 Local knowledge is more reliable than knowledge of SMEC. The study has been prepared by consultant with expertise and
experience in coastal management studies. The report has been
reviewed by the Office of Environment and Heritage. The purpose of
the public exhibition is to allow the community to have input.
Gareth Livingston LAKE CATHIE NSW 2445 Will Council listen to the community or SMEC? Council will consider all information and submissions before making a
decision.
Graham Denton LAKE CATHIE NSW 2445 400m Revetment protection
for Illaroo Road
Objects to section 149 Notice.
Council has a legal obligation to place notations relating to coastal
erosion risk on 149 Planning Certificates. This process discharges
Councils duty of disclosure.
Graham Denton LAKE CATHIE NSW 2445 Residents will be forced out of homes. Under voluntary purchase residents would be able to remain in their
homes as long as practicable.
Proper planning is required to understand and appropriately address
management issues. The Coastal Zone Management Plan (CZMP)
will include further detail of the preferred management strategy and
the steps that will need to be taken to implement the CZMP.
Page 5 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Graham Denton LAKE CATHIE NSW 2445 Council wants to take the homes for themselves There has been significant miss-information spread in the community
and this is incorrect. Planned retreat is a valid option for Council to
consider and is one that is in operation in other Local Government
areas.
Proper planning is required to understand and appropriately address
management issues. The Coastal Zone Management Plan (CZMP)
will include further detail of the preferred management strategy and
the steps that will need to be taken to implement the CZMP.
Graham Denton LAKE CATHIE NSW 2445 Council has already made up their minds about the final decision. Council will consider all information and submissions before making a
decision.
Greg Smith LAKE CATHIE NSW 2445 Multiple Selection
(Revetment + Beach
Nourishment)
Disputes SLR Benchmarks.
Council must take into account the NSW Sea Level Rise Policy
Statement 2009 in the preparation of the CZMP.
Greg Smith LAKE CATHIE NSW 2445 Disputes recession rate in 2007 Hazard Study. Refer Rate of erosion and extent of ZFRC section of Council report.
Greg Smith LAKE CATHIE NSW 2445 Disputes costings of revetment. The basis of costings is set out in Lake Cathie CMS report Appendix
D. Costs will need to be confirmed as part of the detailed design.
Council has acknowledged that If beach nourishment happens in
conjunction Council Dredging Strategy works, assumed cost would
reduce by approximately $1.8M over 50 years.
Greg Smith LAKE CATHIE NSW 2445 Planned retreat will take 51 years, houses will be lost before then. Buying back one house every 3 years was used for the purposes of
costing this option as it is not possible to forecast when properties
would be offered for sale. In addition, it is not possible to predict when
a major coastal erosion event will occur. The hazard lines represent
the position of the back beach erosion escarpment (once it has
slumped to a stable angle of repose) following a major ocean storm
event in the vicinity of Lake Cathie.
Greg Smith LAKE CATHIE NSW 2445 No loss of rates included in the financial assessment. Council provided additional clarification in the Frequently Asked
Questions (FAQ) sheet as follows:
On the basis of 2011/12 rates for 17 properties along Illaroo Road
Council’s general fund rate revenue would be reduced by $1.31M
over a 50 year period if all properties were acquired in year 1. There
would be a loss of general rate income of $0.7M if properties were
acquired on the basis of 1 ever 3 years.
Greg Smith LAKE CATHIE NSW 2445 No costs included to maintain the Reserve that would replace the houses. Council would need to allocate additional funds to its Parks and
Reserves maintenance budget, which is estimated to be in the order
of $10,000 per year if maintenance was carried out to a similar level to
Jonathan Dixon Reserve.
Greg Smith LAKE CATHIE NSW 2445 Disputes figure of 10,000 visitors a year to the beach. Figures are based on Surf Life Saving records of beach users.
Page 6 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Heather McDonald LAKE CATHIE NSW 2445 Multiple Selection
(Revetment + Beach
Nourishment)
Presentation to council meeting on 28 May 2012 forms part of submission. Noted.
Heather McDonald LAKE CATHIE NSW 2445 Inadequate consideration of social impacts. Management studies identify likely option impacts. Prior to
implementation of a preferred option, further detailed assessment
would be required. In the case of a built option, this would include
detailed design and an environmental impact assessment. In the case
of planned retreat it may include a socio-economic impact statement.
Heather McDonald LAKE CATHIE NSW 2445 Revetment is a cheaper option. Lake Cathie CMS Section 7 (Table 7.1) outlines the estimated cost for
each option. When all cost are included (ie. negative impacts,
maintenance etc) costs are comparable.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445
LAKE CATHIE NSW 2445
Multiple Selection
(Revetment + Beach
Nourishment)
Beach and dunes are dynamic.
Coffee rock has slowed recession rate and acts as a revetment and beach has
not been lost past the short term.
Agree.
Lake Cathie CMS Section 2.1, Review of photogrammetric data in the
Hazard Study (SMEC 2008) found an average historical recession
rate of between 0.1 and 0.3 m/year. Coffee rock (indurated sand) has
been shown to provide little resistance during extreme storm events.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445 Stormwater Outlets causing erosion. Stormwater outlets contribute to localised erosion only and do not
significantly influence the larger coastal erosion processes.
Nevertheless, council is currently undertaking works to repair
stormwater outlets.
LAKE CATHIE NSW 2445 Subsurface water causing dune instability. Relates to Hazard Study. See Appendix D for Hazard Assessment.
LAKE CATHIE NSW 2445 Request bathymetry survey to establish the current depth of Cathie Creek. Council has carried out hydrological modelling to examine estuary
related matters.
LAKE CATHIE NSW 2445 Beach visitor numbers disputed. Figures are based on Surf Life Saving records of beach users.
LAKE CATHIE NSW 2445
Lack of native vegetation and uncontrolled pedestrian traffic should be
recognised.
These matters will be considered in the CZMP.
Page 7 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445 Recession rates methodology questioned. The Hazard Study (and hence recession rates) was prepared by
professional coastal engineers, reviewed by NSW government coastal
specialists and ultimately adopted by Council. The Coastline
Management Study (CMS) Stage 2 is based on previously adopted
reports. Refer Rate of Erosion and Extent of ZRFC section of Council
report.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445 Stormwater drains are not at risk from sea level rise. Agree.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445
Report dose not acknowledge the following assets are at risk; the road,
infrastructure, parks or the littoral rainforest.
Lake Cathie CMS Section 2.3 and the Hazard Study identifies the
assets and areas at risk.
LAKE CATHIE NSW 2445 Block failure of coffee rock not supported. Refer Rate of Erosion and Extent of ZRFC section of Council report.
LAKE CATHIE NSW 2445
Service relocation figure could be underestimated depending on where the
services are relocated to.
Costings were based on relocation to the rear of affected properties
along Illaroo Road as per Section 6.2.3 of adopted Stage 1
Management Study.
LAKE CATHIE NSW 2445 Demolition of dwellings not supported. The CZMS will need to incorporate provisions for the adopted
management works.
LAKE CATHIE NSW 2445 Revetment would also protect public property. Agree.
LAKE CATHIE NSW 2445 Native vegetation should be reinstated in any event. The extent and location must reflect the preferred option and the need
for any future engineering works.
LAKE CATHIE NSW 2445 Nourishment supported but not costings. The basis of costings is set out in Lake Cathie CMS report Appendix
D. Costs will need to be confirmed as part of the detailed design.
Council has acknowledged that If beach nourishment happens in
conjunction Council Dredging Strategy works, assumed cost would
reduce by approximately $1.8M over 50 years.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445 Positioning of structure not supported. The CZMP will include detail to refine the positioning of the revetment.
Page 8 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445 Disputes erosion effects of revetment. The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445 Protection of public assets should be shared by all ratepayers. Agree.
LAKE CATHIE NSW 2445
Beach users use the lake as opposed to the beach. Beach amenity cost cannot
be applied to the beach.
It is not possible to provide a direct value for Lake Cathie Beach,
unlike the cost/value of a structure. Studies using travel cost and
'willingness to pay' methodologies to derive a value for a beach or
maintenance of a beach width were used to estimate a value for Lake
Cathie Beach. These methods do not take into account existence
values, value to future generations or ecological/ habitat values.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445
Proper survey should be conducted to attain visitor numbers and beach amenity
cost.
It is not possible to provide a direct value for Lake Cathie Beach,
unlike the cost/value of a structure. Studies using travel cost and
'willingness to pay' methodologies to derive a value for a beach or
maintenance of a beach width were used to estimate a value for Lake
Cathie Beach. These methods do not take into account existence
values, value to future generations or ecological/ habitat values.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445 Visual impacts not considered an issue because rock will not be exposed 24/7. An 'engineered' revetment structure is considered a lower aesthetic
value than a natural coastline system.
LAKE CATHIE NSW 2445 Revetment constructed now would greatly reduce amount of sand needed. The further seaward the revetment is constructed, the greater the
impact on coastal processes. The greater the impact, the more sand
(nourishment) would be required. Timing is not relevant to the amount
of sand needed.
LAKE CATHIE NSW 2445
Reject all figures in Lake Cathie CMS Table 7.3 as Council is responsible for
protecting public assets.
Noted, however it is appropriate to consider viable funding options in
an options assessment. Refer to Lake Cathie CMS Section 7.2 and
reference to DECCW (2010) Coastal Protection Service Change
Guidelines. Also see Section 496B(1) of the Local Government Act
1993.
LAKE CATHIE NSW 2445 Statement that revetment will not attract funding is not supported. Funding assistance is more likely to be given to projects that address
public safety, public assets, and or maintain environmental values.
LAKE CATHIE NSW 2445 Figure for maintenance of revetment is disputed. Maintenance costs for revetment and groyne options have been kept
consistent. Assumption of 3.5% of capital cost is based on
professional experience for maintenance of coastal structures.
Page 9 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445 Figure for maintenance of nourishment is disputed. The basis of costings is set out in Lake Cathie CMS report Appendix
D. Council has acknowledged that If beach nourishment happens in
conjunction Council Dredging Strategy works, assumed cost would
reduce by approximately $1.8M over 50 years.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445
Revetment does not satisfy Ecologically Sustainable Development (ESD)
principles but does satisfy Coastal Protection Act (CPA) requirements.
A revetment will need to comply with s55M(1) of the CPA.
LAKE CATHIE NSW 2444 Opposed to forcing people out of their homes. There has been significant miss-information spread in the community
and this is incorrect. Planned Retreat as recommended is a voluntary
purchase process.
LAKE CATHIE NSW 2445 How is it possible to save public assets by purchasing private homes? Planned Retreat (voluntary purchase) removes assets from the area
of risk.
LAKE CATHIE NSW 2445 Negative of planned retreat not explored. Assumptions were applied consistently in the assessment of all
options. Refer to Lake Cathie CMS Section 7.
Management studies identify likely option impacts. Prior to
implementation of a preferred option, further detailed assessment
would be required. In the case of a built option, this would include
detailed design and an environmental impact assessment. In the case
of planned retreat it may include a socio-economic impact statement.
Jack Jones
C/- Lake Cathie
Progress Association
Inc.
LAKE CATHIE NSW 2445 No study done on the effect of the channel south of Lake Cathie entrance. The coastal processes associated with the opening of the lake are
dynamic and complex. Nevertheless, a localised channel has been
noted to the south of the lake. However this channel is considered to
generate localised impacts and would not significantly influence the
larger coastal erosion processes.
Jan Denton LAKE CATHIE NSW 2445 400m Revetment protection Walkway on top of revetment.
for Illaroo Road
Jerry Berne USA NA Advocating the Holmberg Technology as the coastal protection practice to be
credible.
This issues will be considered in the detailed design.
Noted. The Coastal Zone Management Plan (CZMP) will include
further detail of the preferred management strategy and the steps that
will need to be taken to implement the CZMP including detailed design
options.
John Baylis BEACON HILL NSW 2100 NA Stormwater Outlets causing erosion Stormwater outlets contribute to localised erosion only and do not
significantly influence the larger coastal erosion processes.
Nevertheless, council is currently undertaking works to repair
stormwater outlets.
John McMahon ballyboruma@skymesh.com.au NA Disputes global warming and sea level rise Council must take into account the NSW Sea Level Rise Policy
Statement 2009 in the preparation of the CZMP
John McMahon ballyboruma@skymesh.com.au Let owners take risk Planned retreat where owners take the risk is an option for the CZMP.
Page 10 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
John Simon LAKE CATHIE NSW 2445 400m Revetment protection Poisoning of Bitou Bush.
Bitou bush has a stabilising effect under normal conditions, as does
for Illaroo Road
other dune vegetation. However, during extreme events vegetation
provides little resistance to erosion. Bitou Bush out competes native
species forming a monoculture. It has been declared a noxious weed
and hence Council has an obligation under the Noxious Weeds Act
1993 to control Bitou Bush.
John Simon LAKE CATHIE NSW 2445 Refutes claims of erosion impacts caused by revetment. The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts.
John Simon LAKE CATHIE NSW 2445 Too much emphasis on the look of the beach. Beach amenity is required to be considered as part of a Coastal Zone
Management Plan.
John Simon LAKE CATHIE NSW 2445 Why hasn't something been done previously. It is recommended that the Coastal Zone Management Plan
preparation process be complete to ensure appropriate assessment of
management options.
June Burr NUNDLE NSW 2340 NA Concerned for welfare of residents. It is acknowledged that there is a need to complete the CZMP as soon
as possible so that residents have certainty.
Kate Smith LAKE CATHIE NSW 2445 400m Revetment protection
for Illaroo Road
Not standing up for residents.
Council has an obligation to all rate payers to thoroughly investigate
options to manage coastal hazards where significant funding is being
considered.
Kate Smith LAKE CATHIE NSW 2445 No common sense. The investigation and analysis is based on sound coastal engineering
practice.
Kevin Baker PITTSWORTH NSW 4356 400m Revetment protection
for Illaroo Road
Revetments work all around the world.
The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts.
Lew Pulbrook LAKE CATHIE NSW 2445 NA Devaluation of properties since section 149 notices. Council has a legal obligation to place notations relating to coastal
erosion risk on 149 Planning Certificates. This process discharges
Councils duty of disclosure. As information is updated on the level of
risk, disclosures will be updated accordingly.
Lew Pulbrook LAKE CATHIE NSW 2445 Remove DA restrictions. Council has a statutory obligation to consider appropriate
development controls in relation to coastal erosion risk areas. In
addition, section 4.2 and figure 4.2 indicate general development
assessment criteria that could be applied for developments located
within different hazard zones.
Page 11 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Malcolm McDonald LAKE CATHIE NSW 2445 Multiple Selection
(Revetment + Beach
Nourishment)
No comment on the health and wellbeing of the affected residents.
Management studies identify likely option impacts. Prior to
implementation of a preferred option, further detailed assessment
would be required. In the case of a built option, this would include
detailed design and an environmental impact assessment. In the case
of planned retreat it may include a socio-economic impact statement.
Malcolm McDonald LAKE CATHIE NSW 2445 Remove Planned Retreat from the list. Planned retreat through the Coastal Zone Management process has
been shown to warrant inclusion in the Coastline Management Study
as a viable option that requires consideration.
Malcolm McDonald LAKE CATHIE NSW 2445 Allow properties to be valued at 2006 prices. All options were costed on current (2011) values for comparative
purposes.
Malcolm McDonald LAKE CATHIE NSW 2445 Planned retreat will destroy the community. Planned retreat is a valid option for Council to consider and is one that
is in operation in other Local Government areas.
Malcolm McDonald LAKE CATHIE NSW 2445 Worley Parsons report review (5 June 2012) favours revetment. Report based mainly on economic factors.
Malcolm McDonald LAKE CATHIE NSW 2445 Report dated 3 May differs from final report. Why? This was a preliminary/draft report.
Malcolm-Ieuan
Roberts
Malcolm-Ieuan
Roberts
PULLENVALE QLD 4069 NA No evidence to suggest Enhanced Greenhouse Effect. This is not a matter for the CZMP. Council must take into account the
NSW Sea Level Rise Policy Statement 2009 in the preparation of the
CZMP.
Bruun Rule has been discredited.
Disagree. The Coastal Risk Management Guide incorporating sea
level rise benchmarks in coastal risk assessment (DECW 2010) states
that the Bruun rule "can be used as a coarse first-order approximation
for determining sea level rise induced recession for planning
purposes along the open coast ".
In addition, the limitations of the Bruun rule to determine sea level rise
induced recession are widely known and the NSW government (Office
of Environment and Heritage) recognises the utility of using the Bruun
Rule as a coarse first order assessment in the absence of more
rigorous three-dimensional modelling applications available. It has
been widely applied across NSW in the manner use in the study. The
arguments proposed by Worley Parsons (15 June 2012) about the
“equilibrium profile” offshore of Lake Cathie are not supported. The
Dean equilibrium equation used presumably uses the slope default
parameter (m = 2/3) which was based ostensibly on calibration against
North Sea and US East Coast regimes, not Australian conditions.
Without calibration to Australian seabed conditions, the use of the
generic “equilibrium” profile equation is little more than a very coarse
sensitivity check at best. The fact that an offshore profile adheres or
otherwise to the generic “equilibrium” profile equation does not of itself
indicate the profile to actually be in a state of equilibrium or
disequilibrium (as might be suggested).
Page 12 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Malcolm-Ieuan
Roberts
Bruun Rule to predict 50 & 100 year planning period.
Disagree. The Coastal Risk Management Guide incorporating sea
level rise benchmarks in coastal risk assessment (DECW 2010) states
that the Bruun rule "can be used as a coarse first-order approximation
for determining sea level rise induced recession for planning
purposes along the open coast ".
In addition, the limitations of the Bruun rule to determine sea level rise
induced recession are widely known and the NSW government (Office
of Environment and Heritage) recognises the utility of using the Bruun
Rule as a coarse first order assessment in the absence of more
rigorous three-dimensional modelling applications available. It has
been widely applied across NSW in the manner use in the study. The
arguments proposed by Worley Parsons (15 June 2012) about the
“equilibrium profile” offshore of Lake Cathie are not supported. The
Dean equilibrium equation used presumably uses the slope default
parameter (m = 2/3) which was based ostensibly on calibration against
North Sea and US East Coast regimes, not Australian conditions.
Without calibration to Australian seabed conditions, the use of the
generic “equilibrium” profile equation is little more than a very coarse
sensitivity check at best. The fact that an offshore profile adheres or
otherwise to the generic “equilibrium” profile equation does not of itself
indicate the profile to actually be in a state of equilibrium or
disequilibrium (as might be suggested).
Malcolm-Ieuan
Roberts
Malcolm-Ieuan
Roberts
Malcolm-Ieuan
Roberts
Margaret Fraser-
Martin
LAKE CATHIE NSW 2445
400m Revetment protection
for Illaroo Road
The NSW SLR Benchmarks are based on unvalidated computer models
contradicting scientific evidence.
UN IPCC has a political agenda.
Council should develop alternative measures based on actual sea level rise
rates and use an alternative to the Bruun rule.
Not an independent study.
Council must take into account the NSW Sea Level Rise Policy
Statement 2009 in the preparation of the CZMP.
This is not a matter for the CZMP. Council must take into account the
NSW Sea Level Rise Policy Statement 2009 in the preparation of the
CZMP.
Council is obligated to use NSW government guidelines.
The study has been prepared by consultant with expertise and
experience in coastal management studies. Report has been peer
reviewed by NSW Department of Environment and Climate Change.
Margaret Fraser-
Martin
LAKE CATHIE NSW 2445 Disputes visitor numbers of 10,000. Figures are based on Surf Life Saving records of beach users.
Page 13 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Margaret Fraser- LAKE CATHIE NSW 2445
Limited hydrological data available. Delete "hydrology" - this relates to the study Not all information will be available for this or any study. Where
Martin
of water flows in and over the land and within river systems.
information is lacking estimates, assumptions and modelling must be
used.
Lake Cathie CMS Section 2.1 outlines the limitations to various data
(i.e. there is no local/ regional directional wave data; no nearshore
bathymetric data; the study area did not include the entire beach
embayment therefore the volume of sediment moving along the beach
is unknown, etc).
Margaret Fraser-
Martin
LAKE CATHIE NSW 2445
Coastal Hazard Planning Areas Figure 4.1 is inaccurate and doesn't give
reference to Lake Cathie.
Lake Cathie CMS Figure 4.2 is a generic illustration which indicates
general development assessment criteria for developments located
within different hazard zones. Please refer to Appendix D of Hazard
Study for how hazard lines were derived, e.g. analysis of
photogrammetric data to calculate storm erosion demand and
recession rates based on historical beach profiles, application of
Bruun rule to estimate recession due to sea level rise.
Margaret Fraser-
Martin
LAKE CATHIE NSW 2445
Property values have dropped by 30% since 2009. Property values for planned
retreat assessed before this date.
The assessment was based on estimated current costs for all options.
SMEC relied on a land valuer's opinion of current market values (ie.
late 2011 values) for various types of dwellings along Illaroo Road.
Margaret Fraser-
Martin
LAKE CATHIE NSW 2445 Disputes beach value figure. It is not possible to provide a direct value for Lake Cathie Beach,
unlike the cost/value of a structure. Studies using travel cost and
'willingness to pay' methodologies to derive a value for a beach or
maintenance of a beach width were used to estimate a value for Lake
Cathie Beach. These methods do not take into account existence
values, value to future generations or ecological/ habitat values.
Mary Rule LAKE CATHIE NSW 2445 NA Disputes costings. The basis of costings is set out in Lake Cathie CMS report Appendix
D. Costs will need to be confirmed as part of the detailed design.
Council has acknowledged that If beach nourishment happens in
conjunction Council Dredging Strategy works, assumed cost would
reduce by approximately $1.8M over 50 years.
Maryanne & Stephen
Smallwood
Maryanne & Stephen
Smallwood
Maryanne & Stephen
Smallwood
LAKE CATHIE NSW 2445
Multiple Selection
(Revetment + Beach
Nourishment)
Stormwater Outlets causing erosion.
Stormwater outlets contribute to localised erosion only and do not
significantly influence the larger coastal erosion processes.
Nevertheless, council is currently undertaking works to repair
stormwater outlets.
LAKE CATHIE NSW 2445 Remove Planned Retreat from the list. Planned retreat through the Coastal Zone Management process has
been shown to warrant inclusion in the Coastline Management Study
as a viable option that requires consideration.
LAKE CATHIE NSW 2445 Kenwood Drive bridge trapping sand. Not relevant to coastal study. Refer to recent hydrodynamic model
investigation.
Page 14 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Maryanne & Stephen LAKE CATHIE NSW 2445 Dredging of the lake. Council has a dredging strategy in place for the lake.
Smallwood
Maryanne & Stephen
Smallwood
LAKE CATHIE NSW 2445 Assumptions made for costings. The basis of costings is set out in Lake Cathie CMS report Appendix
D. Costs will need to be confirmed as part of the detailed design.
Council has acknowledged that If beach nourishment happens in
conjunction Council Dredging Strategy works, assumed cost would
reduce by approximately $1.8M over 50 years.
Murray & Isabel
Cowled
LAURIETON NSW 2443
Planned retreat including
acquisition/voluntary
purchase
Nicole Tobin REDHEAD NSW 2290 400m Revetment protection
for Illaroo Road
O.W. Fuller
Parisa Urquhart
Parisa Urquhart
Parisa Urquhart
Parisa Urquhart
RAYMOND TERRACE
NSW 2324
PORT MACQUARIE NSW
2444
PORT MACQUARIE NSW
2445
PORT MACQUARIE NSW
2446
PORT MACQUARIE NSW
2447
Multiple Selection
(Revetment + Beach
Nourishment)
Planned retreat including
acquisition/voluntary
purchase
Short sighted to risk loss of beach to aid a few families.
Concerned for welfare of residents.
Stressful.
Revetment would set precedent for rest of nearby beach.
Planned retreat is cheaper, has environmentally less impact and benefits whole
community.
Agree with rationale used in report.
A revetment would increase erosion.
Council will consider all submissions and issues before making a
decision.
It is acknowledged that there is a need to complete the CZMP as soon
as possible so that residents have certainty.
It is acknowledged that there is a need to complete the CZMP as soon
as possible so that residents have certainty.
Refer Section on Chepana Street Provisions section of Council report
Costs of planned retreat would be higher if voluntary purchase
proposal adopted.
Noted.
SMEC report details problems with revetments including increased
erosion. The impact of revetments/seawalls on a receding coastline
(net sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts.
Paul Flemming LAKE CATHIE NSW 2445 Multiple Selection
(Revetment + Beach
Nourishment)
Planned retreat will take 51 years (1 house every three years), houses will be
lost before then.
Buying back one house every 3 years was used for the purposes of
costing this option as it is not possible to forecast when properties
would be offered for sale. In addition, it is not possible to predict when
a major coastal erosion event will occur. The hazard lines represent
the position of the back beach erosion escarpment (once it has
slumped to a stable angle of repose) following a major ocean storm
event in the vicinity of Lake Cathie.
Page 15 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Paul Flemming LAKE CATHIE NSW 2446 Double counts cost of dredge sand from Lake Cathie (already part of the The report sought to highlight relevant costs for each option so that a
dredging strategy finances)
comparison could be undertaken.
Council provided additional clarification in the Frequently Asked
Questions (FAQ) sheet as follows:
Council’s dredging strategy includes provision for the dredging of
Lake Cathie east of the Ocean Drive bridge on a 5-10 year basis.
While the ongoing works are not guaranteed and are not currently
funded under Council’s budget, Council would consider beach
nourishment works in combination with future dredging should such
an option be adopted.
Paul Flemming LAKE CATHIE NSW 2447 Didn't include 'beach scraping' as option for beach nourishment. Beach scraping from within the same beach embayment does not add
sand to the beach system and technically can not be considered
'nourishment'. If sand was taken from elsewhere along the beach and
stabilised in front of Illaroo Road, beach erosion would be exacerbated
elsewhere.
Paul Flemming LAKE CATHIE NSW 2448 Copyright Infringement from Old Bar report. Old Bar & Illaroo Road not the
same. Impacts from revetment will be different
The authors of Greater Taree and Lake Cathie CZMS are the same
and the Greater Taree reports are acknowledged in Lake Cathie report
Section 10 References and Bibliography. The common information in
the reports is generic to the impact of structures on receding
coastlines. A separate hazard study was completed for Lake Cathie,
which found that the coastline was receding.
Paul Flemming LAKE CATHIE NSW 2449 Revetment would not change the cycles of erosion. The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts.
Paul Flemming LAKE CATHIE NSW 2450 Refutes costings The basis of costings is set out in Lake Cathie CMS report Appendix
D. Costs will need to be confirmed as part of the detailed design.
Council has acknowledged that If beach nourishment happens in
conjunction Council Dredging Strategy works, assumed cost would
reduce by approximately $1.8M over 50 years.
Paul Flemming LAKE CATHIE NSW 2451 Voluntary Purchase did not work at Clarence Valley Planned retreat is a valid option for Council to consider and is one that
is in operation in other Local Government areas.
Paul Flemming LAKE CATHIE NSW 2452 Report does not address how voluntary purchase will work. The Coastal Zone Management Plan (CZMP) will include the
preferred management strategy and the steps that will need to be
taken to implement the CZMP, e.g. detailed studies to refine the
preferred option, detailed assessment of option impacts, statutory
approvals etc.
Paul Flemming LAKE CATHIE NSW 2453 Revetment + beach nourishment provides certifiable protection from erosion
events.
Agree.
Page 16 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Paul Flemming LAKE CATHIE NSW 2454 Lake Cathie has 200,000 m3 sand ingress over 10 years. Nourishment only Incorrect interpretation of dredging strategy.
needs 30,000m3 every 10 years.
Paul Flemming LAKE CATHIE NSW 2455 Does not address Principle 4 of the CZMP Guidelines. Reference was made to the Lake Cathie Hydrodynamic Model and
work by BMT WBM 2011 etc on entrance breakouts, impacts of
changes to the frequency of entrance breakouts, and coastal
processes knowledge on the interaction of ICOLL entrance processes
on open coast processes for the purposes of assessing management
option impacts.
Paul Flemming LAKE CATHIE NSW 2456 Double counting dredging costs. The report sought to highlight relevant costs for each option so that a
comparison could be undertaken.
Council provided additional clarification in the Frequently Asked
Questions (FAQ) sheet as follows:
Council’s dredging strategy includes provision for the dredging of
Lake Cathie east of the Ocean Drive bridge on a 5-10 year basis.
While the ongoing works are not guaranteed and are not currently
funded under Council’s budget, Council would consider beach
nourishment works in combination with future dredging should such
an option be adopted.
Paul Flemming LAKE CATHIE NSW 2457 Revetment would replace already lost coffee rock. No increased erosion would
occur.
The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts.
Paul Flemming LAKE CATHIE NSW 2458 Revetment drawing did not take into account the coffee rock. Coffee rock (indurated sand) is erodible, it would need to be
excavated and replaced with rock of a specified strength. Drawing is
concept only.
Paul Flemming LAKE CATHIE NSW 2460 Disputes Beach Amenity Costs of $27 per visit. It is not possible to provide a direct value for Lake Cathie Beach,
unlike the cost/value of a structure. Studies using travel cost and
'willingness to pay' methodologies to derive a value for a beach or
maintenance of a beach width were used to estimate a value for Lake
Cathie Beach. These methods do not take into account existence
values, value to future generations or ecological/ habitat values.
Paul Flemming LAKE CATHIE NSW 2461 No loss of rate included in the financial assessment. Council provided additional clarification in the Frequently Asked
Questions (FAQ) sheet as follows:
On the basis of 2011/12 rates for 17 properties along Illaroo Road
Council’s general fund rate revenue would be reduced by $1.31M
over a 50 year period if all properties were acquired in year 1. There
would be a loss of general rate income of $0.7M if properties were
acquired on the basis of 1 ever 3 years.
Page 17 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Paul Flemming LAKE CATHIE NSW 2462 No loss of road amenity included in financial assessment. In the Lake Cathie CMS Section 7.1.3 the value of services at risk,
(water mains, power lines, roads etc.) associated with properties at
risk has not been costed (apart from the short-term services relocation
option) because, although these assets may be lost due to shoreline
recession they would no longer be required to service private
residences and conversely, if works were undertaken to protect
property, services and roads would also be protected. However it is
acknowledged that there is a component of road amenity that applies
to the broader community.
Paul Flemming
C/- Lake Cathie
Coastal Residents
Group
Paul Flemming
C/- Lake Cathie
Coastal Residents
Group
LAKE CATHIE NSW 2445 NA Chepana Street Properties are categorised as not considered at any risk before
2050
This is in accordance with the Hazard Study. Refer Rate of Erosion
and Extent of ZRFC and Chepana Street sections of Council report.
LAKE CATHIE NSW 2446 S149 notations be removed from Chepana Street properties Council has a statutory and common law obligation to place notations
relating to coastal erosion risk on section 149 Planning Certificates.
This process discharges Council's duty of disclosure. As information is
updated on the level of risk, disclosures will be updated accordingly.
Paul Flemming
C/- Lake Cathie
Coastal Residents
Group
LAKE CATHIE NSW 2447
Principle 5 of Coastal Planning Guideline SLR not in play because area already
developed.
The guidelines apply to all CZMPs.
Paul Flemming
C/- Lake Cathie
Coastal Residents
Group
LAKE CATHIE NSW 2448
Principle 6 of Coastal Planning Guidelines SLR is stunted through the
application of the Section 149 Certificates
Council has a legal obligation to place notations relating to coastal
erosion risk on 149 Planning Certificates. This process discharges
Councils duty of disclosure. As information is updated on the level of
risk, disclosures will be updated accordingly.
Paul Thompson BONNY HILLS NSW 2445 NA Opposes measures that irrevocably alters the coastline. Council will consider all information and submissions before making a
decision.
Priscilla Flemming LAKE CATHIE NSW 2445 Multiple Selection
(Revetment + Beach
Nourishment)
Revetment is unlikely to cause erosion at the beach with nourishment.
The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts. A sufficient
volume of sand is needed to mitigate exacerbated erosion.
Page 18 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Priscilla Flemming LAKE CATHIE NSW 2446 No loss of road amenity included in financial assessment. In the Lake Cathie CMS Section 7.1.3 the value of services at risk,
(water mains, power lines, roads etc.) associated with properties at
risk has not been costed (apart from the short-term services relocation
option) because, although these assets may be lost due to shoreline
recession they would no longer be required to service private
residences and conversely, if works were undertaken to protect
property, services and roads would also be protected. However it is
acknowledged that there is a component of road amenity that applies
to the broader community.
Priscilla Flemming LAKE CATHIE NSW 2447 Loss of financial revenue to local businesses from loss of residents not included
in financial assessment of planned retreat.
It is acknowledged that there may be some limited loss of revenue to
local businesses if Planned Retreat was implemented.
R.E. Fiore LAKE CATHIE NSW 2445 400m Revetment protection
for Illaroo Road
Stop wasting money.
Proper planning is required to understand and appropriately address
management issues. Coastal planning process must be implemented
in accordance with the Coastal Zone Management Manual to comply
with legislative requirements.
R.J. Burr NUNDLE NSW 2340 Objects to section 149 Notice. Council has a legal obligation to place notations relating to coastal
erosion risk on 149 Planning Certificates. This process discharges
Councils duty of disclosure.
R.J. Burr NUNDLE NSW 2340 Anomalies in report. The report was prepared by professional coastal engineers and
reviewed by NSW government coastal specialists.
R.J. Jolly & J.E. Jones LAKE CATHIE NSW 2445 Formation of channel south from estuary entrance causing erosion. The coastal processes associated with the opening of the lake are
dynamic and complex. Nevertheless, a localised channel has been
noted to the south of the lake. However this channel is considered to
generate localised impacts and would not significantly influence the
larger coastal erosion processes.
R.J. Jolly & J.E. Jones LAKE CATHIE NSW 2445 Would a Groyne of less than 180 meters avoid formation of the channel? A groyne would significantly change the entrance dynamics as
discussed in Lake Cathie CMS Section 5.3.2 and, as noted in Table
7.1, the confidence in predicting impacts is low due to the complexity
of coastal processes
R.J. Jolly & J.E. Jones LAKE CATHIE NSW 2445
Revetment will not prevent erosion from the front of other properties in
surrounding area.
Agree. Refer Chepana Street Provisions section of Council report
R.J. Jolly & J.E. Jones LAKE CATHIE NSW 2445
Ray & Hillary
Spackman
WINGHAM NSW 2429
Planned retreat including
acquisition/voluntary
purchase
Request data showing the building of a groyne and its effect on the channel be
established and published.
Concerned about loss of beach amenity if revetment is built.
A groyne would significantly change the entrance dynamics as
discussed in Lake Cathie CMS Section 5.3.2 and, as noted in Table
7.1, the confidence in predicting impacts is low due to the complexity
of coastal processes.
The SMEC report details problems with revetments including
increased erosion. The impact of revetments/seawalls on a receding
coastline are well known and is evident at other structures. It is also
acknowledged in the Draft NSW government guidelines for assessing
the impacts of seawalls (DECCW 2010) which includes measures to
mitigate erosion impacts.
Ray & Hillary
Spackman
WINGHAM NSW 2429 Short sighted to risk loss of beach to aid a few families. Council will consider all information and submissions before making a
decision.
Page 19 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Russel & Annabelle LAKE CATHIE NSW 2445 400m Revetment protection Objects to section 149 Notice.
Council has a legal obligation to place notations relating to coastal
Secombe
for Illaroo Road
erosion risk on 149 Planning Certificates. This process discharges
Councils duty of disclosure.
Russel & Annabelle
Secombe
LAKE CATHIE NSW 2445 Beach comes and goes over the years. Over short time frames beaches erode and accrete, however over
longer time frames it is evident the Lake Cathie coastline is eroding.
Refer to Hazard Study for recession rates.
Ryan Tobin REDHEAD NSW 2290 Multiple Selection
(Revetment + Beach
Nourishment)
Sandra Tobin LAKE CATHIE NSW 2445 Multiple Selection
(Revetment + Beach
Nourishment)
Concerned for welfare of residents.
No comment on the health and wellbeing of the affected residents.
It is acknowledged that there is a need to complete the CZMP as soon
as possible so that residents have certainty.
Management studies identify likely option impacts. Prior to
implementation of a preferred option, further detailed assessment
would be required. In the case of a built option, this would include
detailed design and an environmental impact assessment. In the case
of planned retreat it may include a socio-economic impact statement.
Sandra Tobin LAKE CATHIE NSW 2445 Emotional stress. It is acknowledged that there is a need to complete the CZMP as soon
as possible so that residents have certainty.
Sandra Tobin LAKE CATHIE NSW 2445 Loss of rates not included in financial estimate for planned retreat. Council provided additional clarification in the Frequently Asked
Questions (FAQ) sheet as follows: On the basis of 2011/12 rates for
17 properties along Illaroo Road Council’s general fund rate revenue
would be reduced by $1.31M over a 50 year period if all properties
were acquired in year 1. There would be a loss of general rate income
of $0.7M if properties were acquired on the basis of 1 ever 3 years.
Sandra Tobin LAKE CATHIE NSW 2445 Loss of road amenity not included in financial estimates. In the Lake Cathie CMS Section 7.1.3 the value of services at risk,
(water mains, power lines, roads etc.) associated with properties at
risk has not been costed (apart from the short-term services relocation
option) because, although these assets may be lost due to shoreline
recession they would no longer be required to service private
residences and conversely, if works were undertaken to protect
property, services and roads would also be protected. However it is
acknowledged that there is a component of road amenity that applies
to the broader community.
Stefan Everingham LAKE CATHIE NSW 2445 Other Supports revetment to middle rock This option was discounted as part of the Stage 1 investigation. Refer
Chepana Street Provisions section of Council Report.
Stefan Everingham LAKE CATHIE NSW 2445 Lack of hydrologic/wave data Lake Cathie CMS Section 9.2.5 recommends ongoing monitoring &
review of the Hazard Study to occur over time as directional wave
data, bathymetry data etc becomes available.
Stefan Everingham LAKE CATHIE NSW 2445 Coffee Rock resistance not known Lake Cathie CMS Section 9.2.4 recommends monitoring of the
shoreline to assess the effectiveness of coffee rock in arresting storm
erosion. Also refer Rate of Erosion and Extent of ZFRC section of
Council report.
Page 20 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Stefan Everingham LAKE CATHIE NSW 2445 Suggest borehole drilling to determine bedrock formation back from dune edge. It should be recognised that no singular approach to defining coastline
hazards for planning purposes will ever be definitive or unequivocal.
Professional judgement and experience will always be required to
assess and accommodate variability in quality and coverage of
available data sets, incomplete physical process understanding, and
the inherent limitations of analytical techniques, tools and numerical
models used to describe or predict hazard components. By virtue,
coastal hazard definition work for planning purposes should be viewed
as a relatively coarse, advisory tool only, with the implicit limitations of
the predictive capabilities of the process reflected in the planning and
management responses considered.
Given these uncertainties, it is appropriate that hazard definition for
planning purposes is considered from an appropriately conservative
perspective and that associated long-term management strategies
should be robust enough to accommodate changed or altered regimes
of physical coastal processes, or their understanding, in the future.
Nevertheless, there is some scope to refine the accuracy of the
hazard zones through expert geotechnical advice relevant to the
mapping and understanding of the extent and homogeneity of the
coffee rock/indurated sand deposits within the dunal system along the
foreshore at Lake Cathie. This geotechnical investigation could be
undertaken by Council as a further study following the adoption of the
CZMP.
Page 21 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Stefan Everingham LAKE CATHIE NSW 2445 Suggest all information should be gained before making decision Not all information will be available for this or any study. Where
information is lacking estimates, assumptions and modelling must be
used.
Lake Cathie CMS Section 2.1 outlines the limitations to various data
(i.e. there is no local/ regional directional wave data; no nearshore
bathymetric data; the study area did not include the entire beach
embayment therefore the volume of sediment moving along the beach
is unknown, etc). If this information was available it would assist in
refining the local wave climate, wave generated currents and hence
sediment transport mechanisms. This would further assist in
establishing design criteria for built structures, however
generalisations can be made for particular sections of the NSW coast
(such as the mid-north coast) as they are subject to the same weather
patterns that generate ocean storms and hence drive sediment
transport. The key factor in establishing the risk to Lake Cathie is
shoreline recession due to sediment loss. A site specific assessment
was made based on analysis of historical recession rates at Lake
Cathie Beach.
Stefan Everingham LAKE CATHIE NSW 2445 Judgement calls should be removed Professional judgements will always be necessary where data is not
available.
This comment appears to relate to assessing whether a structure is at
actual risk in the ZRFC and whether it will continue to be at risk when
the beach recovers from a storm erosion event. As per Lake Cathie
CMS Section 4.2 an assessment of likely beach recovery can be
made with reference to net sediment loss (as identified in the hazard
study) and escarpment height.
Stefan Everingham LAKE CATHIE NSW 2445 Erosion rate overestimated The Hazard Study (and hence associated storm erosion demand) was
prepared by professional coastal engineers, reviewed by NSW
government coastal specialists and ultimately adopted by Council.
The Management Study (CMS) Stage 2 is based on previously
adopted reports. Also refer to Rate of Erosion and Extent of ZRFC
section of Council report.
Stefan Everingham LAKE CATHIE NSW 2445 Construction of seawall timed with erosion event seems invalid. A revetment could be timed to follow an event in order for natural
coastal processes to re-build dune over engineered structure. The
further landward the structure is located the less impact on coastal
processes and the more often it will be buried.
Page 22 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Stefan Everingham LAKE CATHIE NSW 2445 Take sand from Lake Cathie entrance to keep it open. Lake Cathie is an ICOLL and keeping an ICOLL permanently open
would be contrary to coastal zone management principles (e.g.
maintaining the condition of high value coastal ecosystems). Council
has a policy of opening the entrance when the water level reaches 1.6
m AHD only for flood mitigation purposes.
Stefan Everingham LAKE CATHIE NSW 2445 Refutes claim that open entrance reduces safe wading areas. Scour along an engineered structure at the entrance would result in
localised safety impacts (ie. higher velocities and greater water
depths).
Stephen Hunt & Kylie
Outtrim
Stephen Hunt & Kylie
Outtrim
Stephen Hunt & Kylie
Outtrim
Stephen Hunt & Kylie
Outtrim
LAKE CATHIE NSW 2445
Multiple Selection
(Revetment + Beach
Nourishment)
Study shows homes at immediate threat but council will only purchase
properties every three years.
Buying back one house every 3 years was used for the purposes of
costing this option as it is not possible to forecast when properties
would be offered for sale.
LAKE CATHIE NSW 2446 No plan for how properties will be purchased. The Coastal Zone Management Plan (CZMP) will include the
preferred management strategy and the steps that will need to be
taken to implement the CZMP, e.g. detailed studies to refine the
preferred option, detailed assessment of option impacts, statutory
approvals etc.
LAKE CATHIE NSW 2447 Catchment and Estuarine impacts ignored Lake processes are linked to coastal processes. However, coastal
erosion dominated by coastal processes associated with ocean and
wave climate, not estuary processes. Council has carried out
hydrological modelling to examine estuary related matters and this
was considered in the coastal study.
LAKE CATHIE NSW 2448 Informal valuations of house prices The assessment was based on estimated current costs for all options.
SMEC relied on a land valuer's opinion of current market values (ie.
late 2011 values) for various types of dwellings along Illaroo Road.
Stephen Hunt & Kylie
Outtrim
LAKE CATHIE NSW 2449 Not enough study of social impacts Management studies identify likely option impacts. Prior to
implementation of a preferred option, further detailed assessment
would be required. In the case of a built option, this would include
detailed design and an environmental impact assessment. In the case
of planned retreat it may include a socio-economic impact statement.
Stephen Hunt & Kylie
Outtrim
LAKE CATHIE NSW 2450 Double counted dredging costs The report sought to highlight relevant costs for each option so that a
comparison could be undertaken.
Council provided additional clarification in the Frequently Asked
Questions (FAQ) sheet as follows:
Council’s dredging strategy includes provision for the dredging of
Lake Cathie east of the Ocean Drive bridge on a 5-10 year basis.
While the ongoing works are not guaranteed and are not currently
funded under Council’s budget, Council would consider beach
nourishment works in combination with future dredging should such
an option be adopted.
Page 23 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Stephen Hunt & Kylie LAKE CATHIE NSW 2451
Lake Cathie has 200,000 m 3 sand ingress according to dredging strategy, more Incorrect assumption. Additional survey was undertaken in early 2011
Outtrim
than is needed
to more reliably estimate sand availability.
Stephen Hunt & Kylie
Outtrim
LAKE CATHIE NSW 2452 Why wait to build revetment after an erosion event. A revetment could be timed to follow an event in order for natural
coastal processes to re-build dune over engineered structure. The
further landward the structure is located the less impact on coastal
processes and the more often it will be buried.
Stephen Hunt & Kylie
Outtrim
LAKE CATHIE NSW 2453 Copyright Infringement from Old Bar report. Sect 5.2.2. Info not relevant. The authors of Greater Taree and Lake Cathie CZMS are the same
and the Greater Taree reports are acknowledged in Lake Cathie report
Section, 10 References and Bibliography. The common information in
the reports is generic to the impact of structures on receding
coastlines. A separate hazard study was completed for Lake Cathie,
which found that the coastline was receding.
Stephen Hunt & Kylie
Outtrim
LAKE CATHIE NSW 2454 Disputes statement that beach may be lost if revetment is built. The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts.
Stephen Hunt & Kylie
Outtrim
LAKE CATHIE NSW 2455
Disputes claim that visitors would pay $27 per beach visit to Illaroo road and no
evidence provided for amount. Requests evidence.
It is not possible to provide a direct value for Lake Cathie Beach,
unlike the cost/value of a structure. Studies using travel cost and
'willingness to pay' methodologies to derive a value for a beach or
maintenance of a beach width were used to estimate a value for Lake
Cathie Beach. These methods do not take into account existence
values, value to future generations or ecological/ habitat values.
Stephen Hunt & Kylie
Outtrim
Stephen Hunt & Kylie
Outtrim
Stephen Hunt & Kylie
Outtrim
LAKE CATHIE NSW 2456 South of the Lake entrance is not a flagged swimming area. The corner of Illaroo Road and Bundella Avenue has a Lifeguard
Service which is patrolled daily from 9.00 am until 3.00 pm during the
Christmas school holiday period only.
LAKE CATHIE NSW 2457 6.4 M overestimation was glossed over and dishonest. Council acknowledges the typing error and changed the mistake prior
to public exhibition.
LAKE CATHIE NSW 2458 No loss of rates included in the financial assessment. Council provided additional clarification in the Frequently Asked
Questions (FAQ) sheet as follows:
On the basis of 2011/12 rates for 17 properties along Illaroo Road
Council’s general fund rate revenue would be reduced by $1.31M
over a 50 year period if all properties were acquired in year 1. There
would be a loss of general rate income of $0.7M if properties were
acquired on the basis of 1 ever 3 years.
Page 24 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Stephen Hunt & Kylie
Outtrim
LAKE CATHIE NSW 2459 No loss of road amenity included in financial assessment In the Lake Cathie CMS Section 7.1.3 the value of services at risk,
(water mains, power lines, roads etc.) associated with properties at
risk has not been costed (apart from the short-term services relocation
option) because, although these assets may be lost due to shoreline
recession they would no longer be required to service private
residences and conversely, if works were undertaken to protect
property, services and roads would also be protected. However it is
acknowledged that there is a component of road amenity that applies
to the broader community.
Stephen Hunt & Kylie
Outtrim
LAKE CATHIE NSW 2460
Loss of financial revenue to local businesses from loss of residents not included
in financial assessment of planned retreat.
It is acknowledged that there may be some limited loss of revenue to
local businesses if Planned Retreat was implemented.
Stuart Bate DUNBOGAN NSW 2444 Planned retreat including
acquisition/voluntary
purchase
T.C. Grant Wahroonga NSW 2076 400m Revetment protection
for Illaroo Road
Set a precedence for building structures.
Hazard Study Report untrue, errors and inconsistencies.
A CZMP would be developed for other coastal hazard/erosion sites.
No revetment is being considered outside of study area.
The Hazard Study was prepared by professional coastal engineers,
reviewed by NSW government coastal specialists and ultimately
adopted by Council. The Management Study (CMS) Stage 2 is based
on previously adopted reports.
T.C. Grant Wahroonga NSW 2076 No survey done of the extent of the coffee rock and house stability. Noted, however section 9.2.4 recommends monitoring of the shoreline
to assess the effectiveness of coffee rock in arresting storm erosion.
T.C. Grant Wahroonga NSW 2076 Copyright Infringement from Old Bar report. Sect 5.2.2. Info not relevant. The authors of Greater Taree and Lake Cathie CZMS are the same
and the Greater Taree reports are acknowledged in Lake Cathie report
Section 10 References and Bibliography. The common information in
the reports is generic to the impact of structures on receding
coastlines. A separate hazard study was completed for Lake Cathie,
which found that the coastline was receding.
T.C. Grant Wahroonga NSW 2076 Stormwater Outlets causing erosion. Stormwater outlets contribute to localised erosion only and do not
significantly influence the larger coastal erosion processes.
Nevertheless, council is currently undertaking works to repair
stormwater outlets.
T.C. Grant Wahroonga NSW 2076 Many people use the road to take in the view. The value of Illaroo Road should be included.
T.C. Grant Wahroonga NSW 2076 Walkway should be included on top of revetment. This matter will be considered in the detailed design of the revetment.
Terry Holmes WAUCHOPE NSW 2446 NA Most likely SLR scenario must be modelled. Required by Treasury. NSW Government SLR Benchmarks were adopted.
Terry Holmes WAUCHOPE NSW 2447 SLR and beach access paths used to determine historical recession rates. Was This comment relates to the Hazard Study. Refer to Appendix B for
an error and was still included in report.
detailed recession calculations. The Coastline Management Study
(CMS) Stage 2 is based on information in the adopted Hazard Study.
Page 25 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Terry Holmes WAUCHOPE NSW 2448 Keep lake open and dredge lake. Lake Cathie is an ICOLL and keeping an ICOLL permanently open
would be contrary to coastal zone management principles (e.g.
maintaining the condition of high value coastal ecosystems). Council
has a policy of opening the entrance when the water level reaches 1.6
m AHD only for flood mitigation purposes.
Terry Holmes WAUCHOPE NSW 2449 Most beach goers use the lake not the beach so the $27 cannot be attained to
the beach.
It is not possible to provide a direct value for Lake Cathie Beach,
unlike the cost/value of a structure. Studies using travel cost and
'willingness to pay' methodologies to derive a value for a beach or
maintenance of a beach width were used to estimate a value for Lake
Cathie Beach. These methods do not take into account existence
values, value to future generations or ecological/ habitat values.
Terry Holmes WAUCHOPE NSW 2450 Revetment with path on top would increase usage This matter will be considered in the detailed design of the revetment.
Terry Holmes WAUCHOPE NSW 2451 Carbon polluters should help pay because of SLR Not a matter for CZMP.
Terry Holmes WAUCHOPE NSW 2452 Disputes shoreline recession rates and methodology This comment relates to the Hazard Study. Refer to Appendix B for
detailed recession calculations. The Coastline Management Study
(CMS) Stage 2 is based on information in the adopted Hazard Study.
Refer to Rate of Erosion and Extent of ZRFC section of Council report.
Terry Holmes WAUCHOPE NSW 2453 Disputes SLR levels and methodology NSW Government SLR Benchmarks were adopted.
Timothy Tyrrell GLADESVILLE NSW 2111 400m Revetment protection Revetment would create jobs in the region.
This would be of some economic benefit to the local community.
for Illaroo Road
Victoria Baylis LAKE CATHIE NSW 2445 400m Revetment protection
for Illaroo Road
Disputes beach value figure.
It is not possible to provide a direct value for Lake Cathie Beach,
unlike the cost/value of a structure. Studies using travel cost and
'willingness to pay' methodologies to derive a value for a beach or
maintenance of a beach width were used to estimate a value for Lake
Cathie Beach. These methods do not take into account existence
values, value to future generations or ecological/ habitat values.
Victoria Baylis LAKE CATHIE NSW 2446 Use of Old Bar report. The authors of Greater Taree and Lake Cathie CZMS are the same
and the Greater Taree reports are acknowledged in Lake Cathie report
Section 10 References and Bibliography. The common information in
the reports is generic to the impact of structures on receding
coastlines. A separate hazard study was completed for Lake Cathie,
which found that the coastline was receding.
Walter Pulbrook BATEAU BAY NSW 2261 400m Revetment protection
for Illaroo Road
Revetments work all around the world.
The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts.
Page 26 of 27

Lake Cathie Coastline Management Study - Stage 2 Report
Summary of Detailed Submissions - July 2012
Name Address 2 Preferred Option (s) Comments Response
Warren Bell LAKE CATHIE NSW 2443 Beach Nourishment Construct a sand pumping system similar to Noosa. Unlikely to be sufficient sand and would be highly costly.
Warren Bell LAKE CATHIE NSW 2443 Revetment and groyne will cause problems. The impact of revetments/seawalls on a receding coastline (net
sediment loss from beach) are well known and is evident at other
structures. It is also acknowledged in the Draft NSW government
guidelines for assessing the impacts of seawalls (DECCW 2010)
which includes measures to mitigate erosion impacts.
Warren Bell LAKE CATHIE NSW 2443 Construct a laneway behind Illaroo Road properties for their access. Would not address the coastal hazard.
Page 27 of 27