Lake Cathie Coastline Management Study - Stage 2 Report
Lake Cathie Coastline Management Study - Stage 2 Report
Lake Cathie Coastline Management Study - Stage 2 Report
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<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
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<br />
for Illaroo Road<br />
value than a natural coastline system.<br />
Alison Kennedy BONNY HILLS NSW 2445 Revetment will protect and improve the natural environment. A revetment replaces a natural shoreline with an artificial shoreline.<br />
There are implications for other ecological communities as a result of<br />
revetment. Refer to <strong>Lake</strong> <strong>Cathie</strong> CMS Table 7.1 for likely impacts on<br />
the natural environment.<br />
Alison Kennedy BONNY HILLS NSW 2445 Dredge lake west of the bridge. Council has carried out hydrological modelling to examine estuary<br />
related matters. Dredging west of the Ocean Drive Bridge is<br />
constrained by; ecological impacts (e.g. seagrass beds); legislative<br />
barriers to dredging (i.e. <strong>Lake</strong> <strong>Cathie</strong> and <strong>Cathie</strong> Creek are within a<br />
nature reserve subject to the provisions of the National Parks &<br />
Wildlife Act 1994); sediment compatibility issues (i.e. sediments would<br />
not be entirely of marine origin) etc. In addition, Council’s resolution of<br />
the 27 July 2011, limits dredging to downstream of the Ocean Drive<br />
Bridge.<br />
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<br />
sediment loss from beach) are well known and is evident at other<br />
structures. Revetment would protect areas landward of the structure.<br />
Alison Kennedy BONNY HILLS NSW 2445 Risk reduced with revetment as opposed to letting artificial debris fall into the<br />
ocean.<br />
Artificial debris would be removed prior to collapse or destruction.<br />
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<br />
outlined in <strong>Lake</strong> <strong>Cathie</strong> CMS section 7.2 and will need to be confirmed<br />
as part of the CZMP.<br />
Alison Kennedy BONNY HILLS NSW 2445 More detail for buy back option. <strong>Management</strong> studies identify likely option impacts. Prior to<br />
implementation of a preferred option, further detailed assessment<br />
would be required. In the case of a built option, this would include<br />
detailed design and an environmental impact assessment. In the case<br />
of planned retreat it may include a socio-economic impact statement.<br />
Alison Kennedy BONNY HILLS NSW 2445 A Social Impact Assessment should be undertaken. <strong>Management</strong> studies identify likely option impacts. Prior to<br />
implementation of a preferred option, further detailed assessment<br />
would be required. In the case of a built option, this would include<br />
detailed design and an environmental impact assessment. In the case<br />
of planned retreat it may include a socio-economic impact statement.<br />
Anthony Thorne<br />
Anthony Thorne<br />
PO Box 243 PORT<br />
MACUARIE NSW 2444<br />
PO Box 243 PORT<br />
MACUARIE NSW 2445<br />
NA More investigation into revetment is needed. Further studies, detailed design and an environmental impact<br />
assessment would be required, if this was the adopted management<br />
strategy.<br />
Loss of beach amenity is applied only to Revetment why not the other options.<br />
Other built options include a cost for nourishment to maintain the<br />
beach width.<br />
Page 1 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Anthony Thorne PO Box 243 PORT<br />
Disputes 1.5 Cost Benefit Analysis methodology.<br />
Costs and assumptions for the benefit-cost analysis are set out in<br />
MACUARIE NSW 2446<br />
<strong>Lake</strong> <strong>Cathie</strong> CMS Table 7.1.<br />
Anthony Thorne<br />
Anthony Thorne<br />
PO Box 243 PORT<br />
MACUARIE NSW 2447<br />
PO Box 243 PORT<br />
MACUARIE NSW 2448<br />
Underestimates the cost of planned retreat on the residents ($15,000 payment). Refer to <strong>Lake</strong> <strong>Cathie</strong> CMS Section 4.4 and <strong>Lake</strong> <strong>Cathie</strong> CMS Table<br />
4.1 which sets out costs considered.<br />
Funding options should be investigated further.<br />
The funding options identified are suitable for options analysis.<br />
However the Coastal Zone <strong>Management</strong> Plan (CZMP) will include<br />
further detail of funding for the preferred management strategy and<br />
the steps that will need to be taken to implement the CZMP.<br />
Bart Benschop CLAREMONT WA 6010 NA Engineered structures do not work. <strong>Lake</strong> <strong>Cathie</strong> CMS Section 8.1.3 indicates that, "Of the engineered<br />
options considered, only the construction of a properly designed<br />
revetment provides certifiable protection from erosion events. Beach<br />
nourishment and groyne(s) rely in some way on modifying coastal<br />
processes such that the risk is reduced".<br />
However, it is acknowledged that revetments have problems. The<br />
SMEC report details problems with revetments including increased<br />
erosion. The impact of revetments/seawalls on a receding coastline<br />
are well known and is evident at other structures. It is also<br />
acknowledged in the Draft NSW government guidelines for assessing<br />
the impacts of seawalls (DECCW 2010) which includes measures to<br />
mitigate erosion impacts.<br />
Bart Benschop CLAREMONT WA 6010 Techniques used in Netherlands work best. The Coastal Zone <strong>Management</strong> Plan (CZMP) will include further detail<br />
of the preferred management strategy and the steps that will need to<br />
be taken to implement the CZMP including detailed design options.<br />
Bart Benschop CLAREMONT WA 6010 Plant deep rooted vegetation and use mats to collect sediment and stabilise<br />
soil.<br />
Bart Benschop CLAREMONT WA 6010 SMEC have no experience in coastal erosion because its not studied at<br />
Australian universities.<br />
During extreme events vegetation provides little resistance to erosion.<br />
Disagree. SMEC are professional coastal engineers. The <strong>Coastline</strong><br />
<strong>Management</strong> <strong>Study</strong> (CMS) <strong>Stage</strong> 2 was reviewed by NSW<br />
government coastal specialists.<br />
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<br />
erosion studies<br />
Beth Delamotte GUNNEDAH 2380 400m Revetment protection Other houses further back will be jeopardised if no revetment is built.<br />
Coastal erosion impacts are shown in the Hazard <strong>Study</strong> report.<br />
for Illaroo Road<br />
Bill Watson LAKE CATHIE NSW 2445 NA Review Vehicles on Beaches policy Not a matter for the CZMP<br />
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<br />
the ultimate preferred option. However, during extreme events<br />
vegetation provides little resistance to erosion.<br />
Bill Watson LAKE CATHIE NSW 2445 Review beach access arrangements. This will be undertaken as part of the CZMP.<br />
Bill Watson LAKE CATHIE NSW 2445 Close beach access points. This will be undertaken as part of the CZMP<br />
Page 2 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Bill Watson LAKE CATHIE NSW 2445 Review aerial spraying procedure. All spraying is conducted in accordance with licences for the control of<br />
Bitou Bush under the threat abatement plan.<br />
Brad Farr<br />
PORT MACQUARIE NSW<br />
2444<br />
Planned retreat including<br />
acquisition/voluntary<br />
purchase<br />
Revetment will cause further erosion of the beach.<br />
The SMEC report details problems with revetments including<br />
increased erosion. The impact of revetments/seawalls on a receding<br />
coastline are well known and is evident at other structures. It is also<br />
acknowledged in the Draft NSW government guidelines for assessing<br />
the impacts of seawalls (DECCW 2010) which includes measures to<br />
mitigate erosion impacts.<br />
Brad Farr<br />
PORT MACQUARIE NSW<br />
2444<br />
Brad Farr<br />
PORT MACQUARIE NSW<br />
2444<br />
Brad Farr<br />
PORT MACQUARIE NSW<br />
2444<br />
Brian Tobin LAKE CATHIE NSW 2445 Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
Revetment will need to be maintained for extended period.<br />
Beach nourishment is a commitment for the life of the revetment wall.<br />
Decision should not be made on emotion.<br />
No comment on the health and wellbeing of the affected residents.<br />
Options include maintenance costs.<br />
The revetment option would need ongoing beach nourishment to<br />
mitigate negative beach amenity effect.<br />
Council will consider all information and submissions before making a<br />
decision.<br />
<strong>Management</strong> studies identify likely option impacts. Prior to<br />
implementation of a preferred option, further detailed assessment<br />
would be required. In the case of a built option, this would include<br />
detailed design and an environmental impact assessment. In the case<br />
of planned retreat it may include a socio-economic impact statement.<br />
Dianne Henry LAKE CATHIE NSW 2445 Planned retreat including<br />
acquisition/voluntary<br />
purchase<br />
Concerned about loss of beach amenity if revetment is built.<br />
The SMEC report details problems with revetments including<br />
increased erosion. The impact of revetments/seawalls on a receding<br />
coastline are well known and is evident at other structures. It is also<br />
acknowledged in the Draft NSW government guidelines for assessing<br />
the impacts of seawalls (DECCW 2010) which includes measures to<br />
mitigate erosion impacts.<br />
Dianne Henry LAKE CATHIE NSW 2445 "Foreverness" of revetment. The SMEC report details problems with revetments including<br />
increased erosion. The impact of revetments/seawalls on a receding<br />
coastline are well known and is evident at other structures. It is also<br />
acknowledged in the Draft NSW government guidelines for assessing<br />
the impacts of seawalls (DECCW 2010) which includes measures to<br />
mitigate erosion impacts.<br />
Dianne Henry LAKE CATHIE NSW 2445 Many people in <strong>Lake</strong> <strong>Cathie</strong> not aware of the issue. Council wrote to all property owners in the <strong>Lake</strong> <strong>Cathie</strong> village to raise<br />
awareness and also held an Information Day at the Community Hall.<br />
Donna Givan MARCOOLA QLD 4564 400m Revetment protection<br />
for Illaroo Road<br />
Revetments work all around the world.<br />
The impact of revetments/seawalls on a receding coastline (net<br />
sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts.<br />
Emma Smith<br />
BAULKHAM HILLS NSW<br />
2153<br />
400m Revetment protection<br />
for Illaroo Road<br />
Wants home to be there in the future.<br />
Council will consider all information and submissions before making a<br />
decision.<br />
Page 3 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Fiona Stewart LAKE CATHIE NSW 2445 400m Revetment protection Consider the local community.<br />
Council will consider all information and submissions before making a<br />
for Illaroo Road<br />
decision.<br />
Gareth Livingston LAKE CATHIE NSW 2445 400m Revetment protection<br />
for Illaroo Road<br />
Bias towards Planned Retreat.<br />
Assumptions etc were applied consistently in the assessment of all<br />
options. Refer to <strong>Lake</strong> <strong>Cathie</strong> CMS Section 7.<br />
Gareth Livingston LAKE CATHIE NSW 2445 Overlooks residents knowledge of the area. Comment seems to relate to the feelings of the community on what<br />
option they would like to see. This is the purpose of a public exhibition<br />
and seeking submissions on the <strong>Management</strong> <strong>Study</strong> <strong>Stage</strong> 2.<br />
Gareth Livingston LAKE CATHIE NSW 2445 Cost Benefit Analysis methodology wrong. Costs and assumptions for the benefit-cost analysis are set out in<br />
<strong>Lake</strong> <strong>Cathie</strong> CMS Table 7.1.<br />
Gareth Livingston LAKE CATHIE NSW 2445 Disputes beach value figure and methodology used. It is not possible to provide a direct value for <strong>Lake</strong> <strong>Cathie</strong> Beach,<br />
unlike the cost/value of a structure. Studies using travel cost and<br />
'willingness to pay' methodologies to derive a value for a beach or<br />
maintenance of a beach width were used to estimate a value for <strong>Lake</strong><br />
<strong>Cathie</strong> Beach. These methods do not take into account existence<br />
values, value to future generations or ecological/ habitat values.<br />
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<br />
sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts.<br />
Gareth Livingston LAKE CATHIE NSW 2445 Double costing of dredging <strong>Lake</strong> <strong>Cathie</strong>. The report sought to highlight relevant costs for each option so that a<br />
comparison could be undertaken.<br />
Council provided additional clarification in the Frequently Asked<br />
Questions (FAQ) sheet as follows: Council’s dredging strategy<br />
includes provision for the dredging of <strong>Lake</strong> <strong>Cathie</strong> east of the Ocean<br />
Drive bridge on a 5-10 year basis. While the ongoing works are not<br />
guaranteed and are not currently funded under Council’s budget,<br />
Council would consider beach nourishment works in combination with<br />
future dredging should such an option be adopted.<br />
Gareth Livingston LAKE CATHIE NSW 2445 Not having to remove services is a saving to rate payers and is not included in<br />
Cost Benefit Analysis.<br />
In the <strong>Lake</strong> <strong>Cathie</strong> CMS Section 7.1.3 the value of services at risk,<br />
(water mains, power lines, roads etc.) associated with properties at<br />
risk has not been costed (apart from the short-term services relocation<br />
option) because, although these assets may be lost due to shoreline<br />
recession they would no longer be required to service private<br />
residences and conversely, if works were undertaken to protect<br />
property, services and roads would also be protected.<br />
Page 4 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Gareth Livingston LAKE CATHIE NSW 2445 Dunes cannot be restored within given timeframe whereas revetment will save<br />
the dune.<br />
A revetment replaces a natural shoreline with an artificial shoreline.<br />
The impact of revetments/seawalls on a receding coastline are well<br />
known and is evident at other structures. It is also acknowledged in<br />
the Draft NSW government guidelines for assessing the impacts of<br />
seawalls (DECCW 2010) which includes measures to mitigate erosion<br />
impacts. Refer to <strong>Lake</strong> <strong>Cathie</strong> CMS Table 7.1 for likely impacts on the<br />
natural environment.<br />
Gareth Livingston LAKE CATHIE NSW 2445 Nourishment may not even be necessary. <strong>Lake</strong> <strong>Cathie</strong> CMS Appendix D which shows nourishment volumes to<br />
take account of shoreline recession due to sediment loss and sea<br />
level rise. The amount of nourishment will depend on the prevailing<br />
conditions in the future.<br />
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<br />
Questions (FAQ) sheet as follows: On the basis of 2011/12 rates for<br />
17 properties along Illaroo Road Council’s general fund rate revenue<br />
would be reduced by $1.31M over a 50 year period if all properties<br />
were acquired in year 1. There would be a loss of general rate income<br />
of $0.7M if properties were acquired on the basis of 1 ever 3 years.<br />
Gareth Livingston LAKE CATHIE NSW 2445 Hazard lines do not take into account other properties and assets. <strong>Lake</strong> <strong>Cathie</strong> CMS section 7 indicates the 2050 and 2100 hazard lines<br />
will be periodically revised over the next 50 years based on further<br />
data.<br />
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<br />
public safety, public assets, and or maintain environmental values.<br />
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<br />
experience in coastal management studies. The report has been<br />
reviewed by the Office of Environment and Heritage. The purpose of<br />
the public exhibition is to allow the community to have input.<br />
Gareth Livingston LAKE CATHIE NSW 2445 Will Council listen to the community or SMEC? Council will consider all information and submissions before making a<br />
decision.<br />
Graham Denton LAKE CATHIE NSW 2445 400m Revetment protection<br />
for Illaroo Road<br />
Objects to section 149 Notice.<br />
Council has a legal obligation to place notations relating to coastal<br />
erosion risk on 149 Planning Certificates. This process discharges<br />
Councils duty of disclosure.<br />
Graham Denton LAKE CATHIE NSW 2445 Residents will be forced out of homes. Under voluntary purchase residents would be able to remain in their<br />
homes as long as practicable.<br />
Proper planning is required to understand and appropriately address<br />
management issues. The Coastal Zone <strong>Management</strong> Plan (CZMP)<br />
will include further detail of the preferred management strategy and<br />
the steps that will need to be taken to implement the CZMP.<br />
Page 5 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Graham Denton LAKE CATHIE NSW 2445 Council wants to take the homes for themselves There has been significant miss-information spread in the community<br />
and this is incorrect. Planned retreat is a valid option for Council to<br />
consider and is one that is in operation in other Local Government<br />
areas.<br />
Proper planning is required to understand and appropriately address<br />
management issues. The Coastal Zone <strong>Management</strong> Plan (CZMP)<br />
will include further detail of the preferred management strategy and<br />
the steps that will need to be taken to implement the CZMP.<br />
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<br />
decision.<br />
Greg Smith LAKE CATHIE NSW 2445 Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
Disputes SLR Benchmarks.<br />
Council must take into account the NSW Sea Level Rise Policy<br />
Statement 2009 in the preparation of the CZMP.<br />
Greg Smith LAKE CATHIE NSW 2445 Disputes recession rate in 2007 Hazard <strong>Study</strong>. Refer Rate of erosion and extent of ZFRC section of Council report.<br />
Greg Smith LAKE CATHIE NSW 2445 Disputes costings of revetment. The basis of costings is set out in <strong>Lake</strong> <strong>Cathie</strong> CMS report Appendix<br />
D. Costs will need to be confirmed as part of the detailed design.<br />
Council has acknowledged that If beach nourishment happens in<br />
conjunction Council Dredging Strategy works, assumed cost would<br />
reduce by approximately $1.8M over 50 years.<br />
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<br />
costing this option as it is not possible to forecast when properties<br />
would be offered for sale. In addition, it is not possible to predict when<br />
a major coastal erosion event will occur. The hazard lines represent<br />
the position of the back beach erosion escarpment (once it has<br />
slumped to a stable angle of repose) following a major ocean storm<br />
event in the vicinity of <strong>Lake</strong> <strong>Cathie</strong>.<br />
Greg Smith LAKE CATHIE NSW 2445 No loss of rates included in the financial assessment. Council provided additional clarification in the Frequently Asked<br />
Questions (FAQ) sheet as follows:<br />
On the basis of 2011/12 rates for 17 properties along Illaroo Road<br />
Council’s general fund rate revenue would be reduced by $1.31M<br />
over a 50 year period if all properties were acquired in year 1. There<br />
would be a loss of general rate income of $0.7M if properties were<br />
acquired on the basis of 1 ever 3 years.<br />
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<br />
Reserves maintenance budget, which is estimated to be in the order<br />
of $10,000 per year if maintenance was carried out to a similar level to<br />
Jonathan Dixon Reserve.<br />
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.<br />
Page 6 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Heather McDonald LAKE CATHIE NSW 2445 Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
Presentation to council meeting on 28 May 2012 forms part of submission. Noted.<br />
Heather McDonald LAKE CATHIE NSW 2445 Inadequate consideration of social impacts. <strong>Management</strong> studies identify likely option impacts. Prior to<br />
implementation of a preferred option, further detailed assessment<br />
would be required. In the case of a built option, this would include<br />
detailed design and an environmental impact assessment. In the case<br />
of planned retreat it may include a socio-economic impact statement.<br />
Heather McDonald LAKE CATHIE NSW 2445 Revetment is a cheaper option. <strong>Lake</strong> <strong>Cathie</strong> CMS Section 7 (Table 7.1) outlines the estimated cost for<br />
each option. When all cost are included (ie. negative impacts,<br />
maintenance etc) costs are comparable.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445<br />
LAKE CATHIE NSW 2445<br />
Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
Beach and dunes are dynamic.<br />
Coffee rock has slowed recession rate and acts as a revetment and beach has<br />
not been lost past the short term.<br />
Agree.<br />
<strong>Lake</strong> <strong>Cathie</strong> CMS Section 2.1, Review of photogrammetric data in the<br />
Hazard <strong>Study</strong> (SMEC 2008) found an average historical recession<br />
rate of between 0.1 and 0.3 m/year. Coffee rock (indurated sand) has<br />
been shown to provide little resistance during extreme storm events.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445 Stormwater Outlets causing erosion. Stormwater outlets contribute to localised erosion only and do not<br />
significantly influence the larger coastal erosion processes.<br />
Nevertheless, council is currently undertaking works to repair<br />
stormwater outlets.<br />
LAKE CATHIE NSW 2445 Subsurface water causing dune instability. Relates to Hazard <strong>Study</strong>. See Appendix D for Hazard Assessment.<br />
LAKE CATHIE NSW 2445 Request bathymetry survey to establish the current depth of <strong>Cathie</strong> Creek. Council has carried out hydrological modelling to examine estuary<br />
related matters.<br />
LAKE CATHIE NSW 2445 Beach visitor numbers disputed. Figures are based on Surf Life Saving records of beach users.<br />
LAKE CATHIE NSW 2445<br />
Lack of native vegetation and uncontrolled pedestrian traffic should be<br />
recognised.<br />
These matters will be considered in the CZMP.<br />
Page 7 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445 Recession rates methodology questioned. The Hazard <strong>Study</strong> (and hence recession rates) was prepared by<br />
professional coastal engineers, reviewed by NSW government coastal<br />
specialists and ultimately adopted by Council. The <strong>Coastline</strong><br />
<strong>Management</strong> <strong>Study</strong> (CMS) <strong>Stage</strong> 2 is based on previously adopted<br />
reports. Refer Rate of Erosion and Extent of ZRFC section of Council<br />
report.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445 Stormwater drains are not at risk from sea level rise. Agree.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445<br />
<strong>Report</strong> dose not acknowledge the following assets are at risk; the road,<br />
infrastructure, parks or the littoral rainforest.<br />
<strong>Lake</strong> <strong>Cathie</strong> CMS Section 2.3 and the Hazard <strong>Study</strong> identifies the<br />
assets and areas at risk.<br />
LAKE CATHIE NSW 2445 Block failure of coffee rock not supported. Refer Rate of Erosion and Extent of ZRFC section of Council report.<br />
LAKE CATHIE NSW 2445<br />
Service relocation figure could be underestimated depending on where the<br />
services are relocated to.<br />
Costings were based on relocation to the rear of affected properties<br />
along Illaroo Road as per Section 6.2.3 of adopted <strong>Stage</strong> 1<br />
<strong>Management</strong> <strong>Study</strong>.<br />
LAKE CATHIE NSW 2445 Demolition of dwellings not supported. The CZMS will need to incorporate provisions for the adopted<br />
management works.<br />
LAKE CATHIE NSW 2445 Revetment would also protect public property. Agree.<br />
LAKE CATHIE NSW 2445 Native vegetation should be reinstated in any event. The extent and location must reflect the preferred option and the need<br />
for any future engineering works.<br />
LAKE CATHIE NSW 2445 Nourishment supported but not costings. The basis of costings is set out in <strong>Lake</strong> <strong>Cathie</strong> CMS report Appendix<br />
D. Costs will need to be confirmed as part of the detailed design.<br />
Council has acknowledged that If beach nourishment happens in<br />
conjunction Council Dredging Strategy works, assumed cost would<br />
reduce by approximately $1.8M over 50 years.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445 Positioning of structure not supported. The CZMP will include detail to refine the positioning of the revetment.<br />
Page 8 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445 Disputes erosion effects of revetment. The impact of revetments/seawalls on a receding coastline (net<br />
sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445 Protection of public assets should be shared by all ratepayers. Agree.<br />
LAKE CATHIE NSW 2445<br />
Beach users use the lake as opposed to the beach. Beach amenity cost cannot<br />
be applied to the beach.<br />
It is not possible to provide a direct value for <strong>Lake</strong> <strong>Cathie</strong> Beach,<br />
unlike the cost/value of a structure. Studies using travel cost and<br />
'willingness to pay' methodologies to derive a value for a beach or<br />
maintenance of a beach width were used to estimate a value for <strong>Lake</strong><br />
<strong>Cathie</strong> Beach. These methods do not take into account existence<br />
values, value to future generations or ecological/ habitat values.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445<br />
Proper survey should be conducted to attain visitor numbers and beach amenity<br />
cost.<br />
It is not possible to provide a direct value for <strong>Lake</strong> <strong>Cathie</strong> Beach,<br />
unlike the cost/value of a structure. Studies using travel cost and<br />
'willingness to pay' methodologies to derive a value for a beach or<br />
maintenance of a beach width were used to estimate a value for <strong>Lake</strong><br />
<strong>Cathie</strong> Beach. These methods do not take into account existence<br />
values, value to future generations or ecological/ habitat values.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
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<br />
value than a natural coastline system.<br />
LAKE CATHIE NSW 2445 Revetment constructed now would greatly reduce amount of sand needed. The further seaward the revetment is constructed, the greater the<br />
impact on coastal processes. The greater the impact, the more sand<br />
(nourishment) would be required. Timing is not relevant to the amount<br />
of sand needed.<br />
LAKE CATHIE NSW 2445<br />
Reject all figures in <strong>Lake</strong> <strong>Cathie</strong> CMS Table 7.3 as Council is responsible for<br />
protecting public assets.<br />
Noted, however it is appropriate to consider viable funding options in<br />
an options assessment. Refer to <strong>Lake</strong> <strong>Cathie</strong> CMS Section 7.2 and<br />
reference to DECCW (2010) Coastal Protection Service Change<br />
Guidelines. Also see Section 496B(1) of the Local Government Act<br />
1993.<br />
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<br />
public safety, public assets, and or maintain environmental values.<br />
LAKE CATHIE NSW 2445 Figure for maintenance of revetment is disputed. Maintenance costs for revetment and groyne options have been kept<br />
consistent. Assumption of 3.5% of capital cost is based on<br />
professional experience for maintenance of coastal structures.<br />
Page 9 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445 Figure for maintenance of nourishment is disputed. The basis of costings is set out in <strong>Lake</strong> <strong>Cathie</strong> CMS report Appendix<br />
D. Council has acknowledged that If beach nourishment happens in<br />
conjunction Council Dredging Strategy works, assumed cost would<br />
reduce by approximately $1.8M over 50 years.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445<br />
Revetment does not satisfy Ecologically Sustainable Development (ESD)<br />
principles but does satisfy Coastal Protection Act (CPA) requirements.<br />
A revetment will need to comply with s55M(1) of the CPA.<br />
LAKE CATHIE NSW 2444 Opposed to forcing people out of their homes. There has been significant miss-information spread in the community<br />
and this is incorrect. Planned Retreat as recommended is a voluntary<br />
purchase process.<br />
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<br />
of risk.<br />
LAKE CATHIE NSW 2445 Negative of planned retreat not explored. Assumptions were applied consistently in the assessment of all<br />
options. Refer to <strong>Lake</strong> <strong>Cathie</strong> CMS Section 7.<br />
<strong>Management</strong> studies identify likely option impacts. Prior to<br />
implementation of a preferred option, further detailed assessment<br />
would be required. In the case of a built option, this would include<br />
detailed design and an environmental impact assessment. In the case<br />
of planned retreat it may include a socio-economic impact statement.<br />
Jack Jones<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Progress Association<br />
Inc.<br />
LAKE CATHIE NSW 2445 No study done on the effect of the channel south of <strong>Lake</strong> <strong>Cathie</strong> entrance. The coastal processes associated with the opening of the lake are<br />
dynamic and complex. Nevertheless, a localised channel has been<br />
noted to the south of the lake. However this channel is considered to<br />
generate localised impacts and would not significantly influence the<br />
larger coastal erosion processes.<br />
Jan Denton LAKE CATHIE NSW 2445 400m Revetment protection Walkway on top of revetment.<br />
for Illaroo Road<br />
Jerry Berne USA NA Advocating the Holmberg Technology as the coastal protection practice to be<br />
credible.<br />
This issues will be considered in the detailed design.<br />
Noted. The Coastal Zone <strong>Management</strong> Plan (CZMP) will include<br />
further detail of the preferred management strategy and the steps that<br />
will need to be taken to implement the CZMP including detailed design<br />
options.<br />
John Baylis BEACON HILL NSW 2100 NA Stormwater Outlets causing erosion Stormwater outlets contribute to localised erosion only and do not<br />
significantly influence the larger coastal erosion processes.<br />
Nevertheless, council is currently undertaking works to repair<br />
stormwater outlets.<br />
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<br />
Statement 2009 in the preparation of the CZMP<br />
John McMahon ballyboruma@skymesh.com.au Let owners take risk Planned retreat where owners take the risk is an option for the CZMP.<br />
Page 10 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
John Simon LAKE CATHIE NSW 2445 400m Revetment protection Poisoning of Bitou Bush.<br />
Bitou bush has a stabilising effect under normal conditions, as does<br />
for Illaroo Road<br />
other dune vegetation. However, during extreme events vegetation<br />
provides little resistance to erosion. Bitou Bush out competes native<br />
species forming a monoculture. It has been declared a noxious weed<br />
and hence Council has an obligation under the Noxious Weeds Act<br />
1993 to control Bitou Bush.<br />
John Simon LAKE CATHIE NSW 2445 Refutes claims of erosion impacts caused by revetment. The impact of revetments/seawalls on a receding coastline (net<br />
sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts.<br />
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<br />
<strong>Management</strong> Plan.<br />
John Simon LAKE CATHIE NSW 2445 Why hasn't something been done previously. It is recommended that the Coastal Zone <strong>Management</strong> Plan<br />
preparation process be complete to ensure appropriate assessment of<br />
management options.<br />
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<br />
as possible so that residents have certainty.<br />
Kate Smith LAKE CATHIE NSW 2445 400m Revetment protection<br />
for Illaroo Road<br />
Not standing up for residents.<br />
Council has an obligation to all rate payers to thoroughly investigate<br />
options to manage coastal hazards where significant funding is being<br />
considered.<br />
Kate Smith LAKE CATHIE NSW 2445 No common sense. The investigation and analysis is based on sound coastal engineering<br />
practice.<br />
Kevin Baker PITTSWORTH NSW 4356 400m Revetment protection<br />
for Illaroo Road<br />
Revetments work all around the world.<br />
The impact of revetments/seawalls on a receding coastline (net<br />
sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts.<br />
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<br />
erosion risk on 149 Planning Certificates. This process discharges<br />
Councils duty of disclosure. As information is updated on the level of<br />
risk, disclosures will be updated accordingly.<br />
Lew Pulbrook LAKE CATHIE NSW 2445 Remove DA restrictions. Council has a statutory obligation to consider appropriate<br />
development controls in relation to coastal erosion risk areas. In<br />
addition, section 4.2 and figure 4.2 indicate general development<br />
assessment criteria that could be applied for developments located<br />
within different hazard zones.<br />
Page 11 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Malcolm McDonald LAKE CATHIE NSW 2445 Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
No comment on the health and wellbeing of the affected residents.<br />
<strong>Management</strong> studies identify likely option impacts. Prior to<br />
implementation of a preferred option, further detailed assessment<br />
would be required. In the case of a built option, this would include<br />
detailed design and an environmental impact assessment. In the case<br />
of planned retreat it may include a socio-economic impact statement.<br />
Malcolm McDonald LAKE CATHIE NSW 2445 Remove Planned Retreat from the list. Planned retreat through the Coastal Zone <strong>Management</strong> process has<br />
been shown to warrant inclusion in the <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong><br />
as a viable option that requires consideration.<br />
Malcolm McDonald LAKE CATHIE NSW 2445 Allow properties to be valued at 2006 prices. All options were costed on current (2011) values for comparative<br />
purposes.<br />
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<br />
is in operation in other Local Government areas.<br />
Malcolm McDonald LAKE CATHIE NSW 2445 Worley Parsons report review (5 June 2012) favours revetment. <strong>Report</strong> based mainly on economic factors.<br />
Malcolm McDonald LAKE CATHIE NSW 2445 <strong>Report</strong> dated 3 May differs from final report. Why? This was a preliminary/draft report.<br />
Malcolm-Ieuan<br />
Roberts<br />
Malcolm-Ieuan<br />
Roberts<br />
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<br />
NSW Sea Level Rise Policy Statement 2009 in the preparation of the<br />
CZMP.<br />
Bruun Rule has been discredited.<br />
Disagree. The Coastal Risk <strong>Management</strong> Guide incorporating sea<br />
level rise benchmarks in coastal risk assessment (DECW 2010) states<br />
that the Bruun rule "can be used as a coarse first-order approximation<br />
for determining sea level rise induced recession for planning<br />
purposes along the open coast ".<br />
In addition, the limitations of the Bruun rule to determine sea level rise<br />
induced recession are widely known and the NSW government (Office<br />
of Environment and Heritage) recognises the utility of using the Bruun<br />
Rule as a coarse first order assessment in the absence of more<br />
rigorous three-dimensional modelling applications available. It has<br />
been widely applied across NSW in the manner use in the study. The<br />
arguments proposed by Worley Parsons (15 June 2012) about the<br />
“equilibrium profile” offshore of <strong>Lake</strong> <strong>Cathie</strong> are not supported. The<br />
Dean equilibrium equation used presumably uses the slope default<br />
parameter (m = 2/3) which was based ostensibly on calibration against<br />
North Sea and US East Coast regimes, not Australian conditions.<br />
Without calibration to Australian seabed conditions, the use of the<br />
generic “equilibrium” profile equation is little more than a very coarse<br />
sensitivity check at best. The fact that an offshore profile adheres or<br />
otherwise to the generic “equilibrium” profile equation does not of itself<br />
indicate the profile to actually be in a state of equilibrium or<br />
disequilibrium (as might be suggested).<br />
Page 12 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Malcolm-Ieuan<br />
Roberts<br />
Bruun Rule to predict 50 & 100 year planning period.<br />
Disagree. The Coastal Risk <strong>Management</strong> Guide incorporating sea<br />
level rise benchmarks in coastal risk assessment (DECW 2010) states<br />
that the Bruun rule "can be used as a coarse first-order approximation<br />
for determining sea level rise induced recession for planning<br />
purposes along the open coast ".<br />
In addition, the limitations of the Bruun rule to determine sea level rise<br />
induced recession are widely known and the NSW government (Office<br />
of Environment and Heritage) recognises the utility of using the Bruun<br />
Rule as a coarse first order assessment in the absence of more<br />
rigorous three-dimensional modelling applications available. It has<br />
been widely applied across NSW in the manner use in the study. The<br />
arguments proposed by Worley Parsons (15 June 2012) about the<br />
“equilibrium profile” offshore of <strong>Lake</strong> <strong>Cathie</strong> are not supported. The<br />
Dean equilibrium equation used presumably uses the slope default<br />
parameter (m = 2/3) which was based ostensibly on calibration against<br />
North Sea and US East Coast regimes, not Australian conditions.<br />
Without calibration to Australian seabed conditions, the use of the<br />
generic “equilibrium” profile equation is little more than a very coarse<br />
sensitivity check at best. The fact that an offshore profile adheres or<br />
otherwise to the generic “equilibrium” profile equation does not of itself<br />
indicate the profile to actually be in a state of equilibrium or<br />
disequilibrium (as might be suggested).<br />
Malcolm-Ieuan<br />
Roberts<br />
Malcolm-Ieuan<br />
Roberts<br />
Malcolm-Ieuan<br />
Roberts<br />
Margaret Fraser-<br />
Martin<br />
LAKE CATHIE NSW 2445<br />
400m Revetment protection<br />
for Illaroo Road<br />
The NSW SLR Benchmarks are based on unvalidated computer models<br />
contradicting scientific evidence.<br />
UN IPCC has a political agenda.<br />
Council should develop alternative measures based on actual sea level rise<br />
rates and use an alternative to the Bruun rule.<br />
Not an independent study.<br />
Council must take into account the NSW Sea Level Rise Policy<br />
Statement 2009 in the preparation of the CZMP.<br />
This is not a matter for the CZMP. Council must take into account the<br />
NSW Sea Level Rise Policy Statement 2009 in the preparation of the<br />
CZMP.<br />
Council is obligated to use NSW government guidelines.<br />
The study has been prepared by consultant with expertise and<br />
experience in coastal management studies. <strong>Report</strong> has been peer<br />
reviewed by NSW Department of Environment and Climate Change.<br />
Margaret Fraser-<br />
Martin<br />
LAKE CATHIE NSW 2445 Disputes visitor numbers of 10,000. Figures are based on Surf Life Saving records of beach users.<br />
Page 13 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Margaret Fraser- LAKE CATHIE NSW 2445<br />
Limited hydrological data available. Delete "hydrology" - this relates to the study Not all information will be available for this or any study. Where<br />
Martin<br />
of water flows in and over the land and within river systems.<br />
information is lacking estimates, assumptions and modelling must be<br />
used.<br />
<strong>Lake</strong> <strong>Cathie</strong> CMS Section 2.1 outlines the limitations to various data<br />
(i.e. there is no local/ regional directional wave data; no nearshore<br />
bathymetric data; the study area did not include the entire beach<br />
embayment therefore the volume of sediment moving along the beach<br />
is unknown, etc).<br />
Margaret Fraser-<br />
Martin<br />
LAKE CATHIE NSW 2445<br />
Coastal Hazard Planning Areas Figure 4.1 is inaccurate and doesn't give<br />
reference to <strong>Lake</strong> <strong>Cathie</strong>.<br />
<strong>Lake</strong> <strong>Cathie</strong> CMS Figure 4.2 is a generic illustration which indicates<br />
general development assessment criteria for developments located<br />
within different hazard zones. Please refer to Appendix D of Hazard<br />
<strong>Study</strong> for how hazard lines were derived, e.g. analysis of<br />
photogrammetric data to calculate storm erosion demand and<br />
recession rates based on historical beach profiles, application of<br />
Bruun rule to estimate recession due to sea level rise.<br />
Margaret Fraser-<br />
Martin<br />
LAKE CATHIE NSW 2445<br />
Property values have dropped by 30% since 2009. Property values for planned<br />
retreat assessed before this date.<br />
The assessment was based on estimated current costs for all options.<br />
SMEC relied on a land valuer's opinion of current market values (ie.<br />
late 2011 values) for various types of dwellings along Illaroo Road.<br />
Margaret Fraser-<br />
Martin<br />
LAKE CATHIE NSW 2445 Disputes beach value figure. It is not possible to provide a direct value for <strong>Lake</strong> <strong>Cathie</strong> Beach,<br />
unlike the cost/value of a structure. Studies using travel cost and<br />
'willingness to pay' methodologies to derive a value for a beach or<br />
maintenance of a beach width were used to estimate a value for <strong>Lake</strong><br />
<strong>Cathie</strong> Beach. These methods do not take into account existence<br />
values, value to future generations or ecological/ habitat values.<br />
Mary Rule LAKE CATHIE NSW 2445 NA Disputes costings. The basis of costings is set out in <strong>Lake</strong> <strong>Cathie</strong> CMS report Appendix<br />
D. Costs will need to be confirmed as part of the detailed design.<br />
Council has acknowledged that If beach nourishment happens in<br />
conjunction Council Dredging Strategy works, assumed cost would<br />
reduce by approximately $1.8M over 50 years.<br />
Maryanne & Stephen<br />
Smallwood<br />
Maryanne & Stephen<br />
Smallwood<br />
Maryanne & Stephen<br />
Smallwood<br />
LAKE CATHIE NSW 2445<br />
Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
Stormwater Outlets causing erosion.<br />
Stormwater outlets contribute to localised erosion only and do not<br />
significantly influence the larger coastal erosion processes.<br />
Nevertheless, council is currently undertaking works to repair<br />
stormwater outlets.<br />
LAKE CATHIE NSW 2445 Remove Planned Retreat from the list. Planned retreat through the Coastal Zone <strong>Management</strong> process has<br />
been shown to warrant inclusion in the <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong><br />
as a viable option that requires consideration.<br />
LAKE CATHIE NSW 2445 Kenwood Drive bridge trapping sand. Not relevant to coastal study. Refer to recent hydrodynamic model<br />
investigation.<br />
Page 14 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Maryanne & Stephen LAKE CATHIE NSW 2445 Dredging of the lake. Council has a dredging strategy in place for the lake.<br />
Smallwood<br />
Maryanne & Stephen<br />
Smallwood<br />
LAKE CATHIE NSW 2445 Assumptions made for costings. The basis of costings is set out in <strong>Lake</strong> <strong>Cathie</strong> CMS report Appendix<br />
D. Costs will need to be confirmed as part of the detailed design.<br />
Council has acknowledged that If beach nourishment happens in<br />
conjunction Council Dredging Strategy works, assumed cost would<br />
reduce by approximately $1.8M over 50 years.<br />
Murray & Isabel<br />
Cowled<br />
LAURIETON NSW 2443<br />
Planned retreat including<br />
acquisition/voluntary<br />
purchase<br />
Nicole Tobin REDHEAD NSW 2290 400m Revetment protection<br />
for Illaroo Road<br />
O.W. Fuller<br />
Parisa Urquhart<br />
Parisa Urquhart<br />
Parisa Urquhart<br />
Parisa Urquhart<br />
RAYMOND TERRACE<br />
NSW 2324<br />
PORT MACQUARIE NSW<br />
2444<br />
PORT MACQUARIE NSW<br />
2445<br />
PORT MACQUARIE NSW<br />
2446<br />
PORT MACQUARIE NSW<br />
2447<br />
Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
Planned retreat including<br />
acquisition/voluntary<br />
purchase<br />
Short sighted to risk loss of beach to aid a few families.<br />
Concerned for welfare of residents.<br />
Stressful.<br />
Revetment would set precedent for rest of nearby beach.<br />
Planned retreat is cheaper, has environmentally less impact and benefits whole<br />
community.<br />
Agree with rationale used in report.<br />
A revetment would increase erosion.<br />
Council will consider all submissions and issues before making a<br />
decision.<br />
It is acknowledged that there is a need to complete the CZMP as soon<br />
as possible so that residents have certainty.<br />
It is acknowledged that there is a need to complete the CZMP as soon<br />
as possible so that residents have certainty.<br />
Refer Section on Chepana Street Provisions section of Council report<br />
Costs of planned retreat would be higher if voluntary purchase<br />
proposal adopted.<br />
Noted.<br />
SMEC report details problems with revetments including increased<br />
erosion. The impact of revetments/seawalls on a receding coastline<br />
(net sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts.<br />
Paul Flemming LAKE CATHIE NSW 2445 Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
Planned retreat will take 51 years (1 house every three years), houses will be<br />
lost before then.<br />
Buying back one house every 3 years was used for the purposes of<br />
costing this option as it is not possible to forecast when properties<br />
would be offered for sale. In addition, it is not possible to predict when<br />
a major coastal erosion event will occur. The hazard lines represent<br />
the position of the back beach erosion escarpment (once it has<br />
slumped to a stable angle of repose) following a major ocean storm<br />
event in the vicinity of <strong>Lake</strong> <strong>Cathie</strong>.<br />
Page 15 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Paul Flemming LAKE CATHIE NSW 2446 Double counts cost of dredge sand from <strong>Lake</strong> <strong>Cathie</strong> (already part of the The report sought to highlight relevant costs for each option so that a<br />
dredging strategy finances)<br />
comparison could be undertaken.<br />
Council provided additional clarification in the Frequently Asked<br />
Questions (FAQ) sheet as follows:<br />
Council’s dredging strategy includes provision for the dredging of<br />
<strong>Lake</strong> <strong>Cathie</strong> east of the Ocean Drive bridge on a 5-10 year basis.<br />
While the ongoing works are not guaranteed and are not currently<br />
funded under Council’s budget, Council would consider beach<br />
nourishment works in combination with future dredging should such<br />
an option be adopted.<br />
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<br />
sand to the beach system and technically can not be considered<br />
'nourishment'. If sand was taken from elsewhere along the beach and<br />
stabilised in front of Illaroo Road, beach erosion would be exacerbated<br />
elsewhere.<br />
Paul Flemming LAKE CATHIE NSW 2448 Copyright Infringement from Old Bar report. Old Bar & Illaroo Road not the<br />
same. Impacts from revetment will be different<br />
The authors of Greater Taree and <strong>Lake</strong> <strong>Cathie</strong> CZMS are the same<br />
and the Greater Taree reports are acknowledged in <strong>Lake</strong> <strong>Cathie</strong> report<br />
Section 10 References and Bibliography. The common information in<br />
the reports is generic to the impact of structures on receding<br />
coastlines. A separate hazard study was completed for <strong>Lake</strong> <strong>Cathie</strong>,<br />
which found that the coastline was receding.<br />
Paul Flemming LAKE CATHIE NSW 2449 Revetment would not change the cycles of erosion. The impact of revetments/seawalls on a receding coastline (net<br />
sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts.<br />
Paul Flemming LAKE CATHIE NSW 2450 Refutes costings The basis of costings is set out in <strong>Lake</strong> <strong>Cathie</strong> CMS report Appendix<br />
D. Costs will need to be confirmed as part of the detailed design.<br />
Council has acknowledged that If beach nourishment happens in<br />
conjunction Council Dredging Strategy works, assumed cost would<br />
reduce by approximately $1.8M over 50 years.<br />
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<br />
is in operation in other Local Government areas.<br />
Paul Flemming LAKE CATHIE NSW 2452 <strong>Report</strong> does not address how voluntary purchase will work. The Coastal Zone <strong>Management</strong> Plan (CZMP) will include the<br />
preferred management strategy and the steps that will need to be<br />
taken to implement the CZMP, e.g. detailed studies to refine the<br />
preferred option, detailed assessment of option impacts, statutory<br />
approvals etc.<br />
Paul Flemming LAKE CATHIE NSW 2453 Revetment + beach nourishment provides certifiable protection from erosion<br />
events.<br />
Agree.<br />
Page 16 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Paul Flemming LAKE CATHIE NSW 2454 <strong>Lake</strong> <strong>Cathie</strong> has 200,000 m3 sand ingress over 10 years. Nourishment only Incorrect interpretation of dredging strategy.<br />
needs 30,000m3 every 10 years.<br />
Paul Flemming LAKE CATHIE NSW 2455 Does not address Principle 4 of the CZMP Guidelines. Reference was made to the <strong>Lake</strong> <strong>Cathie</strong> Hydrodynamic Model and<br />
work by BMT WBM 2011 etc on entrance breakouts, impacts of<br />
changes to the frequency of entrance breakouts, and coastal<br />
processes knowledge on the interaction of ICOLL entrance processes<br />
on open coast processes for the purposes of assessing management<br />
option impacts.<br />
Paul Flemming LAKE CATHIE NSW 2456 Double counting dredging costs. The report sought to highlight relevant costs for each option so that a<br />
comparison could be undertaken.<br />
Council provided additional clarification in the Frequently Asked<br />
Questions (FAQ) sheet as follows:<br />
Council’s dredging strategy includes provision for the dredging of<br />
<strong>Lake</strong> <strong>Cathie</strong> east of the Ocean Drive bridge on a 5-10 year basis.<br />
While the ongoing works are not guaranteed and are not currently<br />
funded under Council’s budget, Council would consider beach<br />
nourishment works in combination with future dredging should such<br />
an option be adopted.<br />
Paul Flemming LAKE CATHIE NSW 2457 Revetment would replace already lost coffee rock. No increased erosion would<br />
occur.<br />
The impact of revetments/seawalls on a receding coastline (net<br />
sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts.<br />
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<br />
excavated and replaced with rock of a specified strength. Drawing is<br />
concept only.<br />
Paul Flemming LAKE CATHIE NSW 2460 Disputes Beach Amenity Costs of $27 per visit. It is not possible to provide a direct value for <strong>Lake</strong> <strong>Cathie</strong> Beach,<br />
unlike the cost/value of a structure. Studies using travel cost and<br />
'willingness to pay' methodologies to derive a value for a beach or<br />
maintenance of a beach width were used to estimate a value for <strong>Lake</strong><br />
<strong>Cathie</strong> Beach. These methods do not take into account existence<br />
values, value to future generations or ecological/ habitat values.<br />
Paul Flemming LAKE CATHIE NSW 2461 No loss of rate included in the financial assessment. Council provided additional clarification in the Frequently Asked<br />
Questions (FAQ) sheet as follows:<br />
On the basis of 2011/12 rates for 17 properties along Illaroo Road<br />
Council’s general fund rate revenue would be reduced by $1.31M<br />
over a 50 year period if all properties were acquired in year 1. There<br />
would be a loss of general rate income of $0.7M if properties were<br />
acquired on the basis of 1 ever 3 years.<br />
Page 17 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Paul Flemming LAKE CATHIE NSW 2462 No loss of road amenity included in financial assessment. In the <strong>Lake</strong> <strong>Cathie</strong> CMS Section 7.1.3 the value of services at risk,<br />
(water mains, power lines, roads etc.) associated with properties at<br />
risk has not been costed (apart from the short-term services relocation<br />
option) because, although these assets may be lost due to shoreline<br />
recession they would no longer be required to service private<br />
residences and conversely, if works were undertaken to protect<br />
property, services and roads would also be protected. However it is<br />
acknowledged that there is a component of road amenity that applies<br />
to the broader community.<br />
Paul Flemming<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Coastal Residents<br />
Group<br />
Paul Flemming<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Coastal Residents<br />
Group<br />
LAKE CATHIE NSW 2445 NA Chepana Street Properties are categorised as not considered at any risk before<br />
2050<br />
This is in accordance with the Hazard <strong>Study</strong>. Refer Rate of Erosion<br />
and Extent of ZRFC and Chepana Street sections of Council report.<br />
LAKE CATHIE NSW 2446 S149 notations be removed from Chepana Street properties Council has a statutory and common law obligation to place notations<br />
relating to coastal erosion risk on section 149 Planning Certificates.<br />
This process discharges Council's duty of disclosure. As information is<br />
updated on the level of risk, disclosures will be updated accordingly.<br />
Paul Flemming<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Coastal Residents<br />
Group<br />
LAKE CATHIE NSW 2447<br />
Principle 5 of Coastal Planning Guideline SLR not in play because area already<br />
developed.<br />
The guidelines apply to all CZMPs.<br />
Paul Flemming<br />
C/- <strong>Lake</strong> <strong>Cathie</strong><br />
Coastal Residents<br />
Group<br />
LAKE CATHIE NSW 2448<br />
Principle 6 of Coastal Planning Guidelines SLR is stunted through the<br />
application of the Section 149 Certificates<br />
Council has a legal obligation to place notations relating to coastal<br />
erosion risk on 149 Planning Certificates. This process discharges<br />
Councils duty of disclosure. As information is updated on the level of<br />
risk, disclosures will be updated accordingly.<br />
Paul Thompson BONNY HILLS NSW 2445 NA Opposes measures that irrevocably alters the coastline. Council will consider all information and submissions before making a<br />
decision.<br />
Priscilla Flemming LAKE CATHIE NSW 2445 Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
Revetment is unlikely to cause erosion at the beach with nourishment.<br />
The impact of revetments/seawalls on a receding coastline (net<br />
sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts. A sufficient<br />
volume of sand is needed to mitigate exacerbated erosion.<br />
Page 18 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Priscilla Flemming LAKE CATHIE NSW 2446 No loss of road amenity included in financial assessment. In the <strong>Lake</strong> <strong>Cathie</strong> CMS Section 7.1.3 the value of services at risk,<br />
(water mains, power lines, roads etc.) associated with properties at<br />
risk has not been costed (apart from the short-term services relocation<br />
option) because, although these assets may be lost due to shoreline<br />
recession they would no longer be required to service private<br />
residences and conversely, if works were undertaken to protect<br />
property, services and roads would also be protected. However it is<br />
acknowledged that there is a component of road amenity that applies<br />
to the broader community.<br />
Priscilla Flemming LAKE CATHIE NSW 2447 Loss of financial revenue to local businesses from loss of residents not included<br />
in financial assessment of planned retreat.<br />
It is acknowledged that there may be some limited loss of revenue to<br />
local businesses if Planned Retreat was implemented.<br />
R.E. Fiore LAKE CATHIE NSW 2445 400m Revetment protection<br />
for Illaroo Road<br />
Stop wasting money.<br />
Proper planning is required to understand and appropriately address<br />
management issues. Coastal planning process must be implemented<br />
in accordance with the Coastal Zone <strong>Management</strong> Manual to comply<br />
with legislative requirements.<br />
R.J. Burr NUNDLE NSW 2340 Objects to section 149 Notice. Council has a legal obligation to place notations relating to coastal<br />
erosion risk on 149 Planning Certificates. This process discharges<br />
Councils duty of disclosure.<br />
R.J. Burr NUNDLE NSW 2340 Anomalies in report. The report was prepared by professional coastal engineers and<br />
reviewed by NSW government coastal specialists.<br />
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<br />
dynamic and complex. Nevertheless, a localised channel has been<br />
noted to the south of the lake. However this channel is considered to<br />
generate localised impacts and would not significantly influence the<br />
larger coastal erosion processes.<br />
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<br />
discussed in <strong>Lake</strong> <strong>Cathie</strong> CMS Section 5.3.2 and, as noted in Table<br />
7.1, the confidence in predicting impacts is low due to the complexity<br />
of coastal processes<br />
R.J. Jolly & J.E. Jones LAKE CATHIE NSW 2445<br />
Revetment will not prevent erosion from the front of other properties in<br />
surrounding area.<br />
Agree. Refer Chepana Street Provisions section of Council report<br />
R.J. Jolly & J.E. Jones LAKE CATHIE NSW 2445<br />
Ray & Hillary<br />
Spackman<br />
WINGHAM NSW 2429<br />
Planned retreat including<br />
acquisition/voluntary<br />
purchase<br />
Request data showing the building of a groyne and its effect on the channel be<br />
established and published.<br />
Concerned about loss of beach amenity if revetment is built.<br />
A groyne would significantly change the entrance dynamics as<br />
discussed in <strong>Lake</strong> <strong>Cathie</strong> CMS Section 5.3.2 and, as noted in Table<br />
7.1, the confidence in predicting impacts is low due to the complexity<br />
of coastal processes.<br />
The SMEC report details problems with revetments including<br />
increased erosion. The impact of revetments/seawalls on a receding<br />
coastline are well known and is evident at other structures. It is also<br />
acknowledged in the Draft NSW government guidelines for assessing<br />
the impacts of seawalls (DECCW 2010) which includes measures to<br />
mitigate erosion impacts.<br />
Ray & Hillary<br />
Spackman<br />
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<br />
decision.<br />
Page 19 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Russel & Annabelle LAKE CATHIE NSW 2445 400m Revetment protection Objects to section 149 Notice.<br />
Council has a legal obligation to place notations relating to coastal<br />
Secombe<br />
for Illaroo Road<br />
erosion risk on 149 Planning Certificates. This process discharges<br />
Councils duty of disclosure.<br />
Russel & Annabelle<br />
Secombe<br />
LAKE CATHIE NSW 2445 Beach comes and goes over the years. Over short time frames beaches erode and accrete, however over<br />
longer time frames it is evident the <strong>Lake</strong> <strong>Cathie</strong> coastline is eroding.<br />
Refer to Hazard <strong>Study</strong> for recession rates.<br />
Ryan Tobin REDHEAD NSW 2290 Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
Sandra Tobin LAKE CATHIE NSW 2445 Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
Concerned for welfare of residents.<br />
No comment on the health and wellbeing of the affected residents.<br />
It is acknowledged that there is a need to complete the CZMP as soon<br />
as possible so that residents have certainty.<br />
<strong>Management</strong> studies identify likely option impacts. Prior to<br />
implementation of a preferred option, further detailed assessment<br />
would be required. In the case of a built option, this would include<br />
detailed design and an environmental impact assessment. In the case<br />
of planned retreat it may include a socio-economic impact statement.<br />
Sandra Tobin LAKE CATHIE NSW 2445 Emotional stress. It is acknowledged that there is a need to complete the CZMP as soon<br />
as possible so that residents have certainty.<br />
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<br />
Questions (FAQ) sheet as follows: On the basis of 2011/12 rates for<br />
17 properties along Illaroo Road Council’s general fund rate revenue<br />
would be reduced by $1.31M over a 50 year period if all properties<br />
were acquired in year 1. There would be a loss of general rate income<br />
of $0.7M if properties were acquired on the basis of 1 ever 3 years.<br />
Sandra Tobin LAKE CATHIE NSW 2445 Loss of road amenity not included in financial estimates. In the <strong>Lake</strong> <strong>Cathie</strong> CMS Section 7.1.3 the value of services at risk,<br />
(water mains, power lines, roads etc.) associated with properties at<br />
risk has not been costed (apart from the short-term services relocation<br />
option) because, although these assets may be lost due to shoreline<br />
recession they would no longer be required to service private<br />
residences and conversely, if works were undertaken to protect<br />
property, services and roads would also be protected. However it is<br />
acknowledged that there is a component of road amenity that applies<br />
to the broader community.<br />
Stefan Everingham LAKE CATHIE NSW 2445 Other Supports revetment to middle rock This option was discounted as part of the <strong>Stage</strong> 1 investigation. Refer<br />
Chepana Street Provisions section of Council <strong>Report</strong>.<br />
Stefan Everingham LAKE CATHIE NSW 2445 Lack of hydrologic/wave data <strong>Lake</strong> <strong>Cathie</strong> CMS Section 9.2.5 recommends ongoing monitoring &<br />
review of the Hazard <strong>Study</strong> to occur over time as directional wave<br />
data, bathymetry data etc becomes available.<br />
Stefan Everingham LAKE CATHIE NSW 2445 Coffee Rock resistance not known <strong>Lake</strong> <strong>Cathie</strong> CMS Section 9.2.4 recommends monitoring of the<br />
shoreline to assess the effectiveness of coffee rock in arresting storm<br />
erosion. Also refer Rate of Erosion and Extent of ZFRC section of<br />
Council report.<br />
Page 20 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
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<br />
hazards for planning purposes will ever be definitive or unequivocal.<br />
Professional judgement and experience will always be required to<br />
assess and accommodate variability in quality and coverage of<br />
available data sets, incomplete physical process understanding, and<br />
the inherent limitations of analytical techniques, tools and numerical<br />
models used to describe or predict hazard components. By virtue,<br />
coastal hazard definition work for planning purposes should be viewed<br />
as a relatively coarse, advisory tool only, with the implicit limitations of<br />
the predictive capabilities of the process reflected in the planning and<br />
management responses considered.<br />
Given these uncertainties, it is appropriate that hazard definition for<br />
planning purposes is considered from an appropriately conservative<br />
perspective and that associated long-term management strategies<br />
should be robust enough to accommodate changed or altered regimes<br />
of physical coastal processes, or their understanding, in the future.<br />
Nevertheless, there is some scope to refine the accuracy of the<br />
hazard zones through expert geotechnical advice relevant to the<br />
mapping and understanding of the extent and homogeneity of the<br />
coffee rock/indurated sand deposits within the dunal system along the<br />
foreshore at <strong>Lake</strong> <strong>Cathie</strong>. This geotechnical investigation could be<br />
undertaken by Council as a further study following the adoption of the<br />
CZMP.<br />
Page 21 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
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<br />
information is lacking estimates, assumptions and modelling must be<br />
used.<br />
<strong>Lake</strong> <strong>Cathie</strong> CMS Section 2.1 outlines the limitations to various data<br />
(i.e. there is no local/ regional directional wave data; no nearshore<br />
bathymetric data; the study area did not include the entire beach<br />
embayment therefore the volume of sediment moving along the beach<br />
is unknown, etc). If this information was available it would assist in<br />
refining the local wave climate, wave generated currents and hence<br />
sediment transport mechanisms. This would further assist in<br />
establishing design criteria for built structures, however<br />
generalisations can be made for particular sections of the NSW coast<br />
(such as the mid-north coast) as they are subject to the same weather<br />
patterns that generate ocean storms and hence drive sediment<br />
transport. The key factor in establishing the risk to <strong>Lake</strong> <strong>Cathie</strong> is<br />
shoreline recession due to sediment loss. A site specific assessment<br />
was made based on analysis of historical recession rates at <strong>Lake</strong><br />
<strong>Cathie</strong> Beach.<br />
Stefan Everingham LAKE CATHIE NSW 2445 Judgement calls should be removed Professional judgements will always be necessary where data is not<br />
available.<br />
This comment appears to relate to assessing whether a structure is at<br />
actual risk in the ZRFC and whether it will continue to be at risk when<br />
the beach recovers from a storm erosion event. As per <strong>Lake</strong> <strong>Cathie</strong><br />
CMS Section 4.2 an assessment of likely beach recovery can be<br />
made with reference to net sediment loss (as identified in the hazard<br />
study) and escarpment height.<br />
Stefan Everingham LAKE CATHIE NSW 2445 Erosion rate overestimated The Hazard <strong>Study</strong> (and hence associated storm erosion demand) was<br />
prepared by professional coastal engineers, reviewed by NSW<br />
government coastal specialists and ultimately adopted by Council.<br />
The <strong>Management</strong> <strong>Study</strong> (CMS) <strong>Stage</strong> 2 is based on previously<br />
adopted reports. Also refer to Rate of Erosion and Extent of ZRFC<br />
section of Council report.<br />
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<br />
coastal processes to re-build dune over engineered structure. The<br />
further landward the structure is located the less impact on coastal<br />
processes and the more often it will be buried.<br />
Page 22 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Stefan Everingham LAKE CATHIE NSW 2445 Take sand from <strong>Lake</strong> <strong>Cathie</strong> entrance to keep it open. <strong>Lake</strong> <strong>Cathie</strong> is an ICOLL and keeping an ICOLL permanently open<br />
would be contrary to coastal zone management principles (e.g.<br />
maintaining the condition of high value coastal ecosystems). Council<br />
has a policy of opening the entrance when the water level reaches 1.6<br />
m AHD only for flood mitigation purposes.<br />
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<br />
localised safety impacts (ie. higher velocities and greater water<br />
depths).<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
LAKE CATHIE NSW 2445<br />
Multiple Selection<br />
(Revetment + Beach<br />
Nourishment)<br />
<strong>Study</strong> shows homes at immediate threat but council will only purchase<br />
properties every three years.<br />
Buying back one house every 3 years was used for the purposes of<br />
costing this option as it is not possible to forecast when properties<br />
would be offered for sale.<br />
LAKE CATHIE NSW 2446 No plan for how properties will be purchased. The Coastal Zone <strong>Management</strong> Plan (CZMP) will include the<br />
preferred management strategy and the steps that will need to be<br />
taken to implement the CZMP, e.g. detailed studies to refine the<br />
preferred option, detailed assessment of option impacts, statutory<br />
approvals etc.<br />
LAKE CATHIE NSW 2447 Catchment and Estuarine impacts ignored <strong>Lake</strong> processes are linked to coastal processes. However, coastal<br />
erosion dominated by coastal processes associated with ocean and<br />
wave climate, not estuary processes. Council has carried out<br />
hydrological modelling to examine estuary related matters and this<br />
was considered in the coastal study.<br />
LAKE CATHIE NSW 2448 Informal valuations of house prices The assessment was based on estimated current costs for all options.<br />
SMEC relied on a land valuer's opinion of current market values (ie.<br />
late 2011 values) for various types of dwellings along Illaroo Road.<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
LAKE CATHIE NSW 2449 Not enough study of social impacts <strong>Management</strong> studies identify likely option impacts. Prior to<br />
implementation of a preferred option, further detailed assessment<br />
would be required. In the case of a built option, this would include<br />
detailed design and an environmental impact assessment. In the case<br />
of planned retreat it may include a socio-economic impact statement.<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
LAKE CATHIE NSW 2450 Double counted dredging costs The report sought to highlight relevant costs for each option so that a<br />
comparison could be undertaken.<br />
Council provided additional clarification in the Frequently Asked<br />
Questions (FAQ) sheet as follows:<br />
Council’s dredging strategy includes provision for the dredging of<br />
<strong>Lake</strong> <strong>Cathie</strong> east of the Ocean Drive bridge on a 5-10 year basis.<br />
While the ongoing works are not guaranteed and are not currently<br />
funded under Council’s budget, Council would consider beach<br />
nourishment works in combination with future dredging should such<br />
an option be adopted.<br />
Page 23 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Stephen Hunt & Kylie LAKE CATHIE NSW 2451<br />
<strong>Lake</strong> <strong>Cathie</strong> has 200,000 m 3 sand ingress according to dredging strategy, more Incorrect assumption. Additional survey was undertaken in early 2011<br />
Outtrim<br />
than is needed<br />
to more reliably estimate sand availability.<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
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<br />
coastal processes to re-build dune over engineered structure. The<br />
further landward the structure is located the less impact on coastal<br />
processes and the more often it will be buried.<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
LAKE CATHIE NSW 2453 Copyright Infringement from Old Bar report. Sect 5.2.2. Info not relevant. The authors of Greater Taree and <strong>Lake</strong> <strong>Cathie</strong> CZMS are the same<br />
and the Greater Taree reports are acknowledged in <strong>Lake</strong> <strong>Cathie</strong> report<br />
Section, 10 References and Bibliography. The common information in<br />
the reports is generic to the impact of structures on receding<br />
coastlines. A separate hazard study was completed for <strong>Lake</strong> <strong>Cathie</strong>,<br />
which found that the coastline was receding.<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
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<br />
sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts.<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
LAKE CATHIE NSW 2455<br />
Disputes claim that visitors would pay $27 per beach visit to Illaroo road and no<br />
evidence provided for amount. Requests evidence.<br />
It is not possible to provide a direct value for <strong>Lake</strong> <strong>Cathie</strong> Beach,<br />
unlike the cost/value of a structure. Studies using travel cost and<br />
'willingness to pay' methodologies to derive a value for a beach or<br />
maintenance of a beach width were used to estimate a value for <strong>Lake</strong><br />
<strong>Cathie</strong> Beach. These methods do not take into account existence<br />
values, value to future generations or ecological/ habitat values.<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
LAKE CATHIE NSW 2456 South of the <strong>Lake</strong> entrance is not a flagged swimming area. The corner of Illaroo Road and Bundella Avenue has a Lifeguard<br />
Service which is patrolled daily from 9.00 am until 3.00 pm during the<br />
Christmas school holiday period only.<br />
LAKE CATHIE NSW 2457 6.4 M overestimation was glossed over and dishonest. Council acknowledges the typing error and changed the mistake prior<br />
to public exhibition.<br />
LAKE CATHIE NSW 2458 No loss of rates included in the financial assessment. Council provided additional clarification in the Frequently Asked<br />
Questions (FAQ) sheet as follows:<br />
On the basis of 2011/12 rates for 17 properties along Illaroo Road<br />
Council’s general fund rate revenue would be reduced by $1.31M<br />
over a 50 year period if all properties were acquired in year 1. There<br />
would be a loss of general rate income of $0.7M if properties were<br />
acquired on the basis of 1 ever 3 years.<br />
Page 24 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
LAKE CATHIE NSW 2459 No loss of road amenity included in financial assessment In the <strong>Lake</strong> <strong>Cathie</strong> CMS Section 7.1.3 the value of services at risk,<br />
(water mains, power lines, roads etc.) associated with properties at<br />
risk has not been costed (apart from the short-term services relocation<br />
option) because, although these assets may be lost due to shoreline<br />
recession they would no longer be required to service private<br />
residences and conversely, if works were undertaken to protect<br />
property, services and roads would also be protected. However it is<br />
acknowledged that there is a component of road amenity that applies<br />
to the broader community.<br />
Stephen Hunt & Kylie<br />
Outtrim<br />
LAKE CATHIE NSW 2460<br />
Loss of financial revenue to local businesses from loss of residents not included<br />
in financial assessment of planned retreat.<br />
It is acknowledged that there may be some limited loss of revenue to<br />
local businesses if Planned Retreat was implemented.<br />
Stuart Bate DUNBOGAN NSW 2444 Planned retreat including<br />
acquisition/voluntary<br />
purchase<br />
T.C. Grant Wahroonga NSW 2076 400m Revetment protection<br />
for Illaroo Road<br />
Set a precedence for building structures.<br />
Hazard <strong>Study</strong> <strong>Report</strong> untrue, errors and inconsistencies.<br />
A CZMP would be developed for other coastal hazard/erosion sites.<br />
No revetment is being considered outside of study area.<br />
The Hazard <strong>Study</strong> was prepared by professional coastal engineers,<br />
reviewed by NSW government coastal specialists and ultimately<br />
adopted by Council. The <strong>Management</strong> <strong>Study</strong> (CMS) <strong>Stage</strong> 2 is based<br />
on previously adopted reports.<br />
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<br />
to assess the effectiveness of coffee rock in arresting storm erosion.<br />
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 <strong>Lake</strong> <strong>Cathie</strong> CZMS are the same<br />
and the Greater Taree reports are acknowledged in <strong>Lake</strong> <strong>Cathie</strong> report<br />
Section 10 References and Bibliography. The common information in<br />
the reports is generic to the impact of structures on receding<br />
coastlines. A separate hazard study was completed for <strong>Lake</strong> <strong>Cathie</strong>,<br />
which found that the coastline was receding.<br />
T.C. Grant Wahroonga NSW 2076 Stormwater Outlets causing erosion. Stormwater outlets contribute to localised erosion only and do not<br />
significantly influence the larger coastal erosion processes.<br />
Nevertheless, council is currently undertaking works to repair<br />
stormwater outlets.<br />
T.C. Grant Wahroonga NSW 2076 Many people use the road to take in the view. The value of Illaroo Road should be included.<br />
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.<br />
Terry Holmes WAUCHOPE NSW 2446 NA Most likely SLR scenario must be modelled. Required by Treasury. NSW Government SLR Benchmarks were adopted.<br />
Terry Holmes WAUCHOPE NSW 2447 SLR and beach access paths used to determine historical recession rates. Was This comment relates to the Hazard <strong>Study</strong>. Refer to Appendix B for<br />
an error and was still included in report.<br />
detailed recession calculations. The <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong><br />
(CMS) <strong>Stage</strong> 2 is based on information in the adopted Hazard <strong>Study</strong>.<br />
Page 25 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
Terry Holmes WAUCHOPE NSW 2448 Keep lake open and dredge lake. <strong>Lake</strong> <strong>Cathie</strong> is an ICOLL and keeping an ICOLL permanently open<br />
would be contrary to coastal zone management principles (e.g.<br />
maintaining the condition of high value coastal ecosystems). Council<br />
has a policy of opening the entrance when the water level reaches 1.6<br />
m AHD only for flood mitigation purposes.<br />
Terry Holmes WAUCHOPE NSW 2449 Most beach goers use the lake not the beach so the $27 cannot be attained to<br />
the beach.<br />
It is not possible to provide a direct value for <strong>Lake</strong> <strong>Cathie</strong> Beach,<br />
unlike the cost/value of a structure. Studies using travel cost and<br />
'willingness to pay' methodologies to derive a value for a beach or<br />
maintenance of a beach width were used to estimate a value for <strong>Lake</strong><br />
<strong>Cathie</strong> Beach. These methods do not take into account existence<br />
values, value to future generations or ecological/ habitat values.<br />
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.<br />
Terry Holmes WAUCHOPE NSW 2451 Carbon polluters should help pay because of SLR Not a matter for CZMP.<br />
Terry Holmes WAUCHOPE NSW 2452 Disputes shoreline recession rates and methodology This comment relates to the Hazard <strong>Study</strong>. Refer to Appendix B for<br />
detailed recession calculations. The <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong><br />
(CMS) <strong>Stage</strong> 2 is based on information in the adopted Hazard <strong>Study</strong>.<br />
Refer to Rate of Erosion and Extent of ZRFC section of Council report.<br />
Terry Holmes WAUCHOPE NSW 2453 Disputes SLR levels and methodology NSW Government SLR Benchmarks were adopted.<br />
Timothy Tyrrell GLADESVILLE NSW 2111 400m Revetment protection Revetment would create jobs in the region.<br />
This would be of some economic benefit to the local community.<br />
for Illaroo Road<br />
Victoria Baylis LAKE CATHIE NSW 2445 400m Revetment protection<br />
for Illaroo Road<br />
Disputes beach value figure.<br />
It is not possible to provide a direct value for <strong>Lake</strong> <strong>Cathie</strong> Beach,<br />
unlike the cost/value of a structure. Studies using travel cost and<br />
'willingness to pay' methodologies to derive a value for a beach or<br />
maintenance of a beach width were used to estimate a value for <strong>Lake</strong><br />
<strong>Cathie</strong> Beach. These methods do not take into account existence<br />
values, value to future generations or ecological/ habitat values.<br />
Victoria Baylis LAKE CATHIE NSW 2446 Use of Old Bar report. The authors of Greater Taree and <strong>Lake</strong> <strong>Cathie</strong> CZMS are the same<br />
and the Greater Taree reports are acknowledged in <strong>Lake</strong> <strong>Cathie</strong> report<br />
Section 10 References and Bibliography. The common information in<br />
the reports is generic to the impact of structures on receding<br />
coastlines. A separate hazard study was completed for <strong>Lake</strong> <strong>Cathie</strong>,<br />
which found that the coastline was receding.<br />
Walter Pulbrook BATEAU BAY NSW 2261 400m Revetment protection<br />
for Illaroo Road<br />
Revetments work all around the world.<br />
The impact of revetments/seawalls on a receding coastline (net<br />
sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts.<br />
Page 26 of 27
<strong>Lake</strong> <strong>Cathie</strong> <strong>Coastline</strong> <strong>Management</strong> <strong>Study</strong> - <strong>Stage</strong> 2 <strong>Report</strong><br />
Summary of Detailed Submissions - July 2012<br />
Name Address 2 Preferred Option (s) Comments Response<br />
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.<br />
Warren Bell LAKE CATHIE NSW 2443 Revetment and groyne will cause problems. The impact of revetments/seawalls on a receding coastline (net<br />
sediment loss from beach) are well known and is evident at other<br />
structures. It is also acknowledged in the Draft NSW government<br />
guidelines for assessing the impacts of seawalls (DECCW 2010)<br />
which includes measures to mitigate erosion impacts.<br />
Warren Bell LAKE CATHIE NSW 2443 Construct a laneway behind Illaroo Road properties for their access. Would not address the coastal hazard.<br />
Page 27 of 27