Shoalhaven Heads Estuary Taskforce

 

 

Meeting Date:     Monday, 20 November, 2017

Location:            Jervis Bay Rooms, City Administrative Centre, Bridge Road, Nowra

Time:                   4.00pm

 

 

Please note: Council’s Code of Meeting Practice permits the electronic recording and broadcast of the proceedings of meetings of the Council which are open to the public. Your attendance at this meeting is taken as consent to the possibility that your image and/or voice may be recorded and broadcast to the public.

 

 

Agenda

 

1.    Apologies

2.    Confirmation of Minutes

·      Shoalhaven Heads Estuary Taskforce - 20 March 2017............................................. 1

3.    Declarations of Interest

4.    Presentations

·           Research Findings Shoalhaven River Sediment Transport – Rafael Carvalho

5.    Reports

SH17.6........ Update on Taskforce resolutions .................................................................. 5

SH17.7........ Shoalhaven Heads Estuary Task Force recommendations - report on financial and resourcing implications................................................................................... 7                         

6.    General Business


 

 Shoalhaven Heads Estuary Taskforce – Monday 20 November 2017

Page ii

 

Membership

Clr Mitchell Pakes - Chairperson

All Councillors

Mr Gareth Ward MP (Nominee – Mr Paul Ell)

Ms Jessica Zealand

Mr Graeme Philpott

Mr Mike James

Mr Phil Guy

Mr David Lamb

Mr Bob Williamson

Mr Barry/Brian Allen

Mr Craig Peters

Mr Gerald Groom

Mr Stephen Short

Ms Robyn Flack

 

Quorum – Three (3): One (1) Councillor and Two (2) Community Members

 

Purpose

·           Examine options for pursuing a partial or complete opening of Shoalhaven Heads

·           Review Councils current Entrance and Estuary Management Plans for Shoalhaven Heads

·           Report directly to Council

 


 

 

 

 

Minutes of the Shoalhaven Heads Estuary Taskforce

 

 

Meeting Date:     Monday, 20 March 2017

Location:            Jervis Bay Rooms, City Administrative Centre, Bridge Road, Nowra

Time:                   4.04pm

 

 

The following members were present:

 

Clr Andrew Guile – Chairperson

Clr Amanda Findley

Clr John Wells

Clr Annette Alldrick

Brian Allen

Jessica Zealand

Phil Guy

David Lamb

Robyn Flack

Stephen Short

 

Others present:

 

Clr Patricia White

Clr Mitchell Pakes

Tim Fletcher – Director Planning, Environment and Development Group

Kelie Lowe – Environmental Services Manager

Greg Pullen – Economic Development Manager

Alasdair Stratton – Acting Unit Manager Natural Resources and Floodplain

Mir Abdus Subhan – Floodplain & Stormwater Quality Engineer

Ray Massie – Coast and Estuaries Officer

 

 

 

Apologies / Leave of Absence

 

An apology was received from Gerald Groom, Mike James

 

Confirmation of the Minutes

Recommendation

 

That the Minutes of the Shoalhaven Heads Estuary Taskforce held on Monday 12 December 2016 be confirmed.

 

RESOLVED (David Lamb / Clr Alldrick)

That the Minutes of the Shoalhaven Heads Estuary Taskforce held on Monday 12 December 2016 be confirmed.

CARRIED

 

Note:

The Committee raised a point in the previous minutes in relation to the address from the Mayor. In the second dot point it states that the State Government has not provided funding however the State Government has matched $50,000 funding from Council for the WRL Study “Management Options for Improving Flows of the Shoalhaven River at Shoalhaven Heads”.

The Committee feel they do have a united direction and they formed a focus group and have recommendations to put forward.

 

 

Declarations of Interest

 

Nil

 

 

Presentations

 

SH17.1       Progress Update on Taskforce Resolutions

HPERM Ref: D17/84318

Verbal Report – Staff provided a presentation in relation to catchment management projects and actions currently being implemented. These included:

  • Review of the lower Shoalhaven River Floodplain Risk Management Study and Plan
  • St Andrews Way
  • Water Quality Monitoring and Aqua Data Portal
  • Acid Sulphate Soil Project
  • River Road Foreshore Sedimentation Options
  • Discussions with Surf Club – Sand Movement

Recommendation (Clr Wells / Phil Guy)

Council:

1.      Accept the offer from Parramatta Council for the two (2) Water Testing Buoys and the purchase price of $10,000 be covered from the existing 2016/2017 Water Quality Budget

2.      Consider funding allocation from the 2017/2018 Budget for maintenance of the Buoys at a cost of $6,000

CARRIED

 

 

SH17.4       Verbal Update on Economic Development and Tourism

 

Greg Pullen – Economic Development Manager provided a verbal report on the economic assessment and process in relation to Grant funding.

 

 

Note: Clr Wells and Clr White left the meeting at 5.06pm

 

 

 

 

SH17.5       Review of Objectives

 

The Committee discussed ways forward and the objectives of the Committee. It was also noted that Part 2 of the Objectives remove the words “including a permanent opening”.

 

Recommendation (Jessica Zealand / Robyn Flack)

That the Shoalhaven Heads Estuary Taskforce review the Estuary Management Plan as it relates to Shoalhaven Heads and reports to the Shoalhaven Natural Resources and Floodplain Management Committee requesting the following change:

1.      Estuary Management Plan Reflect Community Values

a.      Ensure the values of the Shoalhaven Heads community are adequately represented within the Estuary Management Plan.

CARRIED

 

Recommendation (Phil Guy / Stephen Short)

That Council receive and note these objectives as identified by the Committee and the General Manager report back on the financial and resourcing implications associated with the objectives outlined below:

1.      Storm-water Management River Road  (immediate)

a.      Redirect three storm-water outlets along River Road in front of the Hotel.

2.      River Road Erosion Control Works (immediate)

a.      Undertake urgent remedial work from Matt Black’s report and create a sand buffer along River Road to reinforce erosion control works and provide a recreational space around foreshores.

b.      Further consideration to be given to moving the channel further out from the bank. Create a sand buffer along River Road to reinforce erosion control works and provide a recreational space around foreshores.

3.      Trial Geotechnical Groynes (medium)

a.      Design and commission groyne system into ocean at entrance to direct flow at the next flood event by producing an entrance design using the groyne system illustrated in WRL Report 2015.

b.      The design to include a dune care works programme that compliments the groyne system and encourages a narrower entrance that scours deeper rather than wider entrance during a flood event.

4.      Dredge or Dragline Programme (medium)

a.      Investigate alternative boating channels to help protect foreshore sand buffers by providing a more direct access to main river basin.

b.      Around Holiday Haven Caravan Park and River Road foreshore to provide wider bank buffers and restore clean sand, water recreation and boating with better water depth

5.      Pursue Commercial Dredging (long term)

a.      Options in the Shoalhaven River of Old Man Gut and Kurrajong Island that can offset the cost of maintenance dredging in the basin at Shoalhaven Heads.

6.      Submerged wall or groyne System at O’Keefes Point (long term)

a.      Investigate placing a groyne or groynes along the river bank near O’Keefe’s point deflecting flow from Berry’s Canal towards Shoalhaven Heads.

CARRIED

 

Reports

 

SH17.2       Membership - Resignation from Allan Richardson and Application from Carole Cassidy

HPERM Ref: D17/59969

Recommendation (Item to be determined under delegated authority)

That Council

1.    Accept the resignation of Mr Allan Richardson

2.    Write to Mr Richardson to thank him for his contribution to the Taskforce.

3.    Appoint Ms Carole Cassidy as a community member of the Shoalhaven Heads Estuary Taskforce

4.    Write to Ms Cassidy to notify her of her appointment and invite her to all future meetings.

 

It was noted that the form should include additional criteria in relation to technical expertise and or background that would contribute to the Committee.

 

RESOLVED (Stephen Short / Robyn Flack)

That the Committee accept the resignation from Allan Richardson and defer other applications until after the community drop in session on 9 April 2017.

CARRIED

 

 

SH17.3       Outcome - Representations to Local Members - Funding - Shoalhaven Heads Estuary Taskforce Objectives

HPERM Ref: D17/37183

Recommendation (Item to be determined under delegated authority)

That the report regarding the results of representations made to Federal and State Local Members requesting support to source funding for the Shoalhaven Heads Taskforce objectives be received for information.

 

RESOLVED (Clr Guile / Amanda Findley)

This matter be deferred and reported back to the next meeting.

CARRIED

 

     

 

Note:

The Chairperson and the Committee acknowledged that this will be Tim Fletcher’s last meeting and thanked him and his staff for his contributions and commitment to the Committee.

 

 

There being no further business, the meeting concluded, the time being 6.23pm.

 

 

Clr Guile

CHAIRPERSON

 

 

 


 

 Shoalhaven Heads Estuary Taskforce – Monday 20 November 2017

Page 5

 

 

SH17.6       Update on Taskforce resolutions

 

HPERM Ref:       D17/375925

 

Group:                Planning Environment & Development Group 

Section:              Environmental Services

 

Attachments:     1. Business Case - Grant Application - Regional Growth - Environment & Tourism Fund - Shoalhaven Heads - River Road Foreshore Precinct (under separate cover)

2. River Road Foreshore - Assessment of Coastal Management Options - WRL technical report (under separate cover)

 

    

 

Purpose / Summary

The purpose of this report is to provide an update on progress on past resolutions from the Taskforce as requested by one of the Taskforce community members.

 

Recommendation (Item to be determined under delegated authority)

That the Taskforce receive the report for information.

 

 

Options

1.    Receive the report for information.

 

2.    Alternative recommendation.

Implications: Unknown

 

Background

Phil Guy, a community representative on the Taskforce, requested Council to provide an update on the following matters. Council’s response is contained below.

1.    Status of previous adopted recommendations from the SHET.

Separate report prepared and included in this business paper.

 

2.    Status of Grant application for remedial works at River Rd embankment.

Expression of interest (EOI) to the Restart NSW Regional Growth – Environment and Tourism Fund was successful with Council invited to lodge a full grant application.

Locale Consulting was engaged to assist Council officers in preparing documents for full grant application. The grant application included community consultation to inform detailed project design including foreshore protection works, foreshore access infrastructure and upgrade to stormwater outlets referred to in item 4. A copy of the business case lodged as part of the grant application is contained in attachment 1.

The grant application referenced the ‘River Road Foreshore, Shoalhaven Heads: Assessment of Coastal Option, Final Draft August 2017’ prepared by Water Research Laboratory (WRL). The recommended option from the WRL assessment was a rock seawall. The construction costings for the grant application are based on this recommendation, however it is important to note that the final option will require detailed design and this will be informed by community consultation.

 

3.    Status of proposed grant application for dredging and shore nourishment as recommended within the Matt Blacka report.  

No dredging was proposed as part of the Restart NSW Regional Growth – Environment and Tourism Fund. As detailed in the separate report contained in this business paper, dredging would require significant separate environmental assessment, licences and approvals and was outside the scope of the application.

Council has however included in the grant application a beach scraping and beach nourishment component. The business case document describes this in more detail (attachment 1). Council has already commenced investigations and surveys to assess sourcing sand from the management of the dry notch at Shoalhaven Heads in accordance with the Shoalhaven River Entrance Management Plan.

In regard to dredging for navigation purposes, Council’s Asset Management Section have advised that Shoalhaven Heads is serviced with 3 boat launching ramps. Alternative boat launching ramps in Wharf Road and Hay Avenue provide good access into the river for deep hulled trailerable boats. It is unsustainable for all boat ramps and navigation channels to be maintained to be able to cater for all boat/trailer combinations in all-weather/tidal/river conditions.” Council has applied for funding from the Better Boating Now (Round Two) Program for upgrading the Wharf Road boat ramp and if successful will provide a much improved facility reducing demand of the River Road facility.

 

4.    Status of funded stormwater redirection works at River Rd embankment.

Investigations have commenced. Stormwater improvements included in grant application scope of works.

 

5.    Status of the revision of the Shoalhaven Heads entrance management plan

Council has engaged Consultants Cardno (NSW/ACT) Pty Ltd to undertake the Lower Shoalhaven River Floodplain Risk Management Study and Plan, which includes the review of the current entrance management policy. Completion of this study and plan is anticipated mid-2020 at this point of time. Assessment of the entrance policy according to Cardno’s project program will be undertaken early 2019 following then by community consultation in June 2019.

 

Community Engagement

A community engagement component was included as part of the Shoalhaven Heads River Road Foreshore Precinct grant application.

 

Financial Implications

Delivery of the Shoalhaven Heads River Road Foreshore Precinct project will rely upon grant funding to deliver to the full project scope. The project is estimated to cost $1.7 million.

 

Risk Implications

There is a financial risk that the actual construction costs could significantly increase compared to the estimated costs due to level of activity in the development industry and cost of sourcing materials.

The risk implications for the grant project have been included in the documents to support the grant application.


 

 Shoalhaven Heads Estuary Taskforce – Monday 20 November 2017

Page 7

 

 

SH17.7       Shoalhaven Heads Estuary Task Force recommendations - report on financial and resourcing implications

 

HPERM Ref:       D17/262657

 

Group:                Planning Environment & Development Group  

 

    

 

Purpose / Summary

On 28 March 2017, Council passed the following two resolutions to receive a report on the financial and resourcing implications on the recommendations of the Shoalhaven Heads Estuary taskforce as follows:

Resolution One - MIN17.275

That the Shoalhaven Heads Estuary Taskforce review the Estuary Management Plan as it relates to Shoalhaven Heads and reports to the Shoalhaven Natural Resources and Floodplain Management Committee requesting the following change:

1.         Estuary Management Plan Reflect Community Values

a.       Ensure the values of the Shoalhaven Heads community are adequately represented within the Estuary Management Plan.

Resolution Two – MIN17.276

That Council receive and note these objectives as identified by the Committee and the General Manager report back on the financial and resourcing implications associated with the objectives outlined below:

1.   Storm-water Management River Road (immediate)

a.   Redirect three storm-water outlets along River Road in front of the Hotel

2.   River Road Erosion Control Works (immediate)

a.   Undertake urgent remedial work from Matt Black’s report and create a sand buffer along River Road to reinforce erosion control works and provide a recreational space around foreshores.

b.   Further consideration to be given to moving the channel further out from the bank. Create a sand buffer along River Road to reinforce erosion control works and provide a recreational space around foreshores.

3.   Trial Geotechnical Groynes (medium)

a.   Design and commission groyne system into ocean at entrance to direct flow at the next flood event by producing an entrance design using the groyne system illustrated in WRL Report 2015.

b.   The design to include a dune care works programme that compliments the groyne system and encourages a narrower entrance that scours deeper rather than wider entrance during a flood event.

 

 

 

4.   Dredge or Dragline Programme (medium)

a.   Investigate alternative boating channels to help protect foreshore sand buffers by providing a more direct access to main river basin.

b.   Around Holiday Haven Caravan Park and River Road foreshore to provide wider bank buffers and restore clean sand, water recreation and boating with better water depth

5.   Pursue Commercial Dredging (long term)

a.   Options in the Shoalhaven River of Old Man Gut and Kurrajong Island that can offset the cost of maintenance dredging in the basin at Shoalhaven Heads.

6.   Submerged wall or groyne System at O’Keefe’s Point (long term)

a.   Investigate placing a groyne or groynes along the river bank near O’Keefe’s point deflecting flow from Berry’s Canal towards Shoalhaven Heads

 

Recommendation (Item to be determined under delegated authority)

1.    That Council receive the report on financial and resource implications of the Shoalhaven Heads Estuary Taskforce recommended objectives for information; and

2.    Council continue to work with the Shoalhaven Heads community to develop River Road Foreshore Precinct to address coastal erosion, as per the options identified in the Draft NSW Water Research Laboratory Assessment of Coastal Management Options.

 

 

Options

1.    As recommended.

Implications – The review of the Shoalhaven River Estuary Management Plan would need to be undertaken as part of the new NSW Coastal Management Act under the NSW coastal reforms. Council has applied for the Restart NSW Regional Infrastructure – Environment and Tourism Fund grant for the River Road coastal foreshore protection works.

 

2.    Not support the recommendation.

Implications – Without external funding assistance, Council is unable to fund River Road Foreshore Protection project within its current budget. This would lead to a loss of reserve, road and public utility infrastructure and community recreational values along River Road.

 

Background

Each of the resolutions actions/objectives has been examined using the following criteria to access economic, social and environmental impacts and resources required to achieve them.

1.   Breakdown of the tasks or works required to achieve the objective

2.   What community and staffing resources would be required for the work/task

3.   Timeframe

4.   Economic cost to undertake the task

These have been presented in a table format below and was provided to Councillors at a Councillor briefing on 8 June 2017.

 

1.   Ensure the values of the Shoalhaven Heads community are adequately represented within the Estuary Management Plan

This resolution would require a review of the of the Shoalhaven River Estuary Management Plan (SREMP) which would take two (2) years, excluding time need to secure funding, and cost an estimated $120,500, details outlined below in Figure 1:

 

Tasks/Work Required

Resources Required

Timeframe (months)

Estimated Cost

Seek approval from State Government Agencies to review the Shoalhaven River EMP

Existing staff, engage a project officer to engage/consult to comply with new CMP guidelines

3

$5,000

Seek funding to review the SREMP from NSW OEH

Council officers and SHET

12

$5,000 to prepare application

($20,000 to $120,000 grant amount depending on OEH requirements, surveys & assessments required)

 

If grant funding successful continue to tender process for review of SREMP

Council officers and OEH

3

$3,000

Selection of successful of tender consultant

Council officers and SHET

1

$2,000

Undertake review and collect any necessary data required  

Successful consultant

12

$80,000

Finalise Draft Review for Community/stakeholder and agency consultation and SHET

Consultant and staff

6

$20,000

Collate all submissions on draft review

Staff

2

$3,000

Report to SHET/Council

Staff

1

$2,000

Adoption of the review

Council

2

$500

Total time and cost

3.5 years

$120, 500

Figure 1: Breakdown of task, timeframe & cost for the review of the Shoalhaven River Estuary Management Plan (SREMP)

 

2.   Stormwater Management River Road (immediate) - Redirect three stormwater outlets along River Road in front of the Hotel.

Part to (2) of the resolution was to re-design and construct  stormwater to consolidate the existing three (3) stormwater outlets into two (2) outlets along River Rd, the table outlines the process. Cost estimated at $345,000 over 21 months.

Stage/s

Tasks/Work Required

Resources Required

Timeframe (months)

Estimated Cost

Survey/Design

Stormwater drainage survey/assessment of storm water catchments to access volumes/flows/condition of storm water drains

Stormwater engineer/surveyors

3

$5,000

Preparation of design (based on surveys) to incorporate onto the River Rd erosion revetment works

 

Stormwater engineer/designer

6

$20,000

Approval/s

Preparation of Review of Environmental Factors (REF) for stormwater works (this will incorporate both the erosion revetment and storm water works)

 

Consultant

3

$10,000

Work

Tender stormwater and erosion works  and selection

Staff

3

$5,000

Undertake stormwater/erosion revetment work

Civil Engineering Company

6

$300,000

Maintenance

Rehabilitation? Maintenance

Staff/Contractor

On-going

$5,000

Total time and cost

21 months

$345,000

Figure 2: Breakdown of stages, task, time and costs for stormwater management at River Rd

3.   Stormwater Management River Road  (immediate):

a.   Undertake urgent remedial work from Matt Black’s report and create a sand buffer along River Road to reinforce erosion control works and provide a recreational space around foreshores.

 

b.   Further consideration to be given to moving the channel further out from the bank. Create a sand buffer along River Road to reinforce erosion control works and provide a recreational space around foreshores.

The following table gives a breakdown of the task, cost and timeframe for the erosion control works and is based on the final draft River Road Foreshore, Shoalhaven Heads: Assessment of Coastal Management Options, prepared by Water research Laboratory (WRL), UNSW. The cost, without beach nourishment and dredging, is estimated at $1,052,000 over 3 years and up to 5 years if a cost benefit analysis is required in accordance with the draft NSW Coastal Manual.

 

Stage/s

Tasks/Work Required

Resources Required

Timeframe (months)

Estimated Cost

Study

Preliminary scoping study to assess geomorphological process in relation to the proposal

 

Consultant with geomorphological expertise

3

$15,000

Study/report

If study determines that the proposal is feasible proceed to undertaking a coast benefit analysis

Economist

3

$50,000

Preparation of costings and options report

Consultant

12

$25,000

Consultation

Consultation with community/stakeholders/agencies on options report

Staff

3

$5,000

 

Finalise preferred option based on feedback

 

Staff and SHET

2

$2,000

Approvals

Preparation of Review of Environmental Factors (REF) for project

Consultant

6

$65,000

 

Seek Approvals and license from State Govt agencies (NSW OEH, NSW Crown Lands, NSW DPI Fisheries, NSW NPWS)

 

Staff

6

$5,000

Works

Project detail design

Consultant

12

$80,000

 

Project tender process

Staff

3

$5,000

 

Undertake project works

Civil Engineering/dredging Company

12

$500,000

Maintenance

Monitoring/Maintenance/Rehabilitation  of project

Contractor/Staff

 

On-going

 

$300,000

Total time and cost

5 yrs.

$1,052,000

Figure 3: Breakdown of stages, task, timeframe and costs of foreshore erosion remediation and dredging/sand nourishment options

 

4.   Trial Geotechnical Groynes (medium)

a.   Design and commission groyne system into ocean at entrance to direct flow at the next flood event by producing an entrance design using the groyne system illustrated in WRL Report 2015.

b.   The design to include a dune care works programme that compliments the groyne system and encourages a narrower entrance that scours deeper rather than wider entrance during a flood event.

 

The design and costings of the multiple groyne system was based on information from an assessment of the entrance examined by Posford et al (1977) outlined in the report prepared by the UNSW Water Research Laboratory (MHL) titled “Management Options for Improving Flows of the Shoalhaven River at Shoalhaven Heads, Gilmore W.C, Ruprecht E and Rayner D S. It is important to also note that the part b of this resolution is not in accordance with the adopted Shoalhaven Entrance Management Policy.

 

Stage/s

Tasks/Work Required

Resources Required

Timeframe months

Estimated Cost

Pre-project studies/assessment & consultation

Review the Shoalhaven River Flood Risk Management Plan and the Entrance Management Policy to include data on flood modelling for the semi-permanent river entrance opening

 

Staff and Flood engineer

12

$80,000

Community consultation on the entrance management policy and flood risk management plan

Council staff, community, stakeholders, State Govt agencies

6

$5,000

Develop project brief in consultation with government agencies and community for options report

Staff and SHET

6

$10,000

Detailed design study to access/confirm efficiency of a constructed entrance and to insure there would be no adverse effects on estuary health as a result  of a constructed entrance

Coastal engineer or Environmental Scientist 

12

$250,000

Undertake cost benefit analysis

Economist

6

$100,000

Scoping report on the options for a constructed entrance (rock or geobags) as per Posford (1977) scoping design

 

Coastal Engineer

6

$100,000

Consultation with stakeholders/community on options/CBA for groynes

Staff

6

$10,000

Proceed to based on results of consultation/options selected

Approvals

 

Environmental assessments – EIS or REF

Consultant

12

$100,000

 

Seek approvals from state government - NSW Crown Land License (Dredge), NSW DPI Fisheries (Permit to Harm), NSW Office of Environment and Heritage (Threatened Species and Permit to dredge), NSW Roads and Maritime Service and Environment Australia (Shorebird Protection & Migratory Agreements)

 

Local, State and Federal Government Staff & Ministers

12

$50,000

If environmental assessment concludes that project should proceed without major constraints and approval from state and federal government are obtained then proceed to development application stage

Development application

Prepare a DA for the project to the State Joint Regional Planning Panel

Staff and consultants

12

$80,000

If DA is approved by the JRPP proceed to design and construction stage

Design and Construction

Detailed design based on the option/s selected

 

Coastal Engineer

12

$150,000

 

Community consultation on final design with community and stakeholders

Staff & SHET

3

$10,000

 

Modifications to design in response to community or agency comments

Coastal Engineer

3

$10,000

 

Preparation of tender for groyne construction + associated dredging of entrance

Staff

3

$5,000

 

Tender selection process

Staff and Councillors

3

$3,000

 

Construction of groyne and semi-permanent entrance opening as per the 1977 Posford design with 2 x 200m and 6 x 160m groynes based on an estimated costs of $35,000/linear metre

Civil & Environmental Engineering Contractor

12

$47,600,000

 

Undertake dune restoration works

Environmental contractor

3

$500,000

Maintenance

Undertake maintenance of groyne, river entrance (as per reviewed entrance management policy) and the dune restoration work

 

Contractor/staff

On-going

$1,500.000

Total timeframe and cost of project

3.3 yrs.

$50,563,000

Figure 4: Breakdown of stages, tasks, resources and cost required for construction of groynes at Shoalhaven River entrance

 

 

Figure 5: Diagram of Posford (1977) multiple groyne system

 

5.   Dredge or Dragline Programme (medium)

a.         Investigate alternative boating channels to help protect foreshore sand buffers by providing a more direct access to main river basin.

b.         Around Holiday Haven Caravan Park and River Road foreshore to provide wider bank buffers and restore clean sand, water recreation and boating with better water depth

 

Figure 5: Map showing proposed dredged navigation channel and proposed dredged sand bar to provide wider bank buffer

 

Stage/s

Tasks/Work Required

Resources Required

Timeframe mths

Estimated Cost

Project studies, assessment and consultation

Develop project brief in consultation with government agencies and community for options report

 

Local & State Government Staff

3

$10,000

Preliminary scoping study to access feasibility of project geomorphilogically

 

Geomorphologist

6

$50,000

Undertake an economic cost benefit analysis for the dredging project

 

Economist

6 - 12

$100,000

Investigations, costings and  design options for selection of navigation channel  for dredging and sand nourishment of Northern shoreline of river 

 

Coastal Engineer

12

$100,000

Consultation with stakeholders/community on options/costings for dredging /sand nourishment

Staff & SHET

3

$5,000

Proceed to environmental assessment/approval based on result of consultation

 

 

 

 

Project Approvals

Environmental assessment – Review of Environmental Factors or Environmental Impact Statement (EIS/REF)

Environmental consultant

12

$1,000,000

 

Seek approvals from state government - NSW Crown Land License (Dredge), NSW DPI Fisheries (Permit to Harm) and NSW Office of Environment and Heritage and NSW Roads and Maritime Service.

 

Staff

12

$20,000

If environmental assessment concludes project to proceed and approval granted

 

 

 

 

Project Design and Implementation

Detailed design based on the option/s selected

 

Coastal Engineer

6

$100,000

Community consultation on final design with community and stakeholders

 

Staff

3

$15,000

Modifications to design in response to community or agency comments

 

Coastal Engineer

2

$10,000

Preparation of tender for dredging and nourishment and selection o

Staff

6

$5,000

Design and implementation

Undertake project works - dredging of navigation channel and sand nourishment of northern foreshore of based on design and REF

Dredging contractor

12

$500,000

Maintenance

On-going dredging of navigation channel and sand nourishment on an annual basis or as or following

Dredging contractor

Following extreme weather events

$150,000

Total timeframe and costs

 5yrs 11mths

$2,065,000

Figure 6. Breakdown of stages, tasks, resources, timeframe and cost for investigation of dredging for boating channel and sand buffer.

 

Estimated annual cost (this is only estimated annual cost as there are many variables that would effect on-going dredging cost such as weather events. It is estimated that it would cost approximately $650,000 annually.

 

 

6.   Pursue Commercial Dredging (long term)

a.         Options in the Shoalhaven River of Old Man Gut and Kurrajong Island that can offset the cost of maintenance dredging in the basin at Shoalhaven Heads.

 

80% of the proposed project site is located on SEPP 14 Wetland and is zoned Environmental Conservation - E2 under the Shoalhaven SLEP 2014. The clearing, infilling, dredging, drilling or construction of levees on this areas is not permitted without consent from Shoalhaven Council and the NSW Department of Planning and Environment

 

Figure 7: Map showing proposed commercial dredging location and groyne break wall

 

Stage/s

Tasks/Work Required

Resources Required

Timeframe mths

Estimated Cost

Project studies, assessments

Coast benefit analysis on feasibility of dredging

Economist

6

$100,000

Survey and modelling study to access the impact on estuary health of hydrology/tidal movements on the estuary

Coastal Engineer/Geomorphologist

6

$250,000

If cost benefit analysis and modelling/studies conclude that commercial dredging is viable proceed

 

 

Consultation

Develop project brief in consultation with government agencies and community for options report

Staff and consultants

6

$20,0000

Consultation with stakeholders/community on options/costings for dredging

Staff and SHET

3

$40,000

Based on brief and preferred option chosen move to approval stage

 

 

Approval

Preparation of an Environmental Impact Statement (EIS) for projects

Environmental consultant/scientist

12

$2,000,000

Seek approvals/licence from State Governments agencies   - NSW Department of Planning and Environment (SEPP 14 Wetland), NSW Crown Lands (Dredging License), NSW Office of Environment and Heritage (Estuary & EEC), NSW Roads and Maritime Service (Navigation), NSW DPI Fisheries (Marine Vegetation & Fish Habitat)  Commonwealth

Local & State Government Staff

12

$200,000

If EIS recommends that commercial dredging can proceed and all state government approval are given

 

 

Development Application

Submit Development Application for consent by Shoalhaven Council and NSW Department of Planning and Environment

Staff and consultants

24

$25,000

If Development Application is approved move to implementation stage

 

 

Contract and tender

Preparation of commercial dredging/sand supply contract (incorporate maintenance dredging within the river mouth area to maintain navigation channel and sand nourishment of River Rd frontage) for approval by Shoalhaven Council

Local and State government staff

6

$50,000

Tender preparation, and selection process for commercial dredging

Local and state government

3

$50,000

Award tender and contract to commercial dredging/sand supply company

Council and state government

2

$5,000

Monitoring

On-going monitoring of dredging project site and estuary to access impacts of dredging on estuary health (which would be part of the approval and consents)

Staff/Consultants

On-going

$500,000

Total costs and timeframe

6.6yrs

$3,240,410

Figure 8: Breakdown of stages, tasks, resources, timeframe and cost of commercial dredging on the Shoalhaven River

 

 

7.   Submerged wall or groyne System at O’Keefe’s Point (long term)

a.         Investigate placing a groyne or groynes along the river bank near O’Keefe’s point deflecting flow from Berry’s Canal towards Shoalhaven Heads

 

Note: That the modelling undertaken by WRL in the 2015 study Modelling Options for Improving Flows at the Shoalhaven River at Shoalhaven Heads”, indicated that the modelling a constriction  flow scenario via the construction of a groyne would create a large eddy near the mouth of Berry’s Canal.

 

Stage/s

Tasks/Work Required

Resources Required

Timeframe mths

Estimated Cost

Studies/ Reviews and Consultation

Cost benefit analysis on feasibility of groyne

Economist

6

$100,000

Survey and modelling study to access the impact on estuary health of the estuary, flooding and tidal movement

Coastal Engineer/Environmental Scientist

24

$250,000

Review of the Lower Shoalhaven River Flood Study Report/Plan to determine the effects of a groyne on flooding

Flood Engineer

12

$80,000

Review of the Shoalhaven River Entrance Management Plan for Flood Mitigation due to changed flooding dynamics from the construction of the groyne

Flood Engineer

12

$80,000

Community/Stakeholder consultation for Flood Risk and Entrance Management Plans

Staff

6

$10,000

Outcomes of cost benefit analysis, modelling/study and river flood and entrance management plans access that the project is feasible proceed

 

 

Options Report

Report on investigations, costings and  design options for construction of the groyne

Coastal/Flood Engineer

12

$150,000

Consultation with community, stakeholders, state government agencies on options

Staff

6

$10,000

The outcomes of the report and consultation will determine how the project will proceed

 

 

Approval

Preparation of and Environmental Impact Statement  (EIS) for the project 

Environmental Scientist

18

$100,000

Seek approvals from State government agencies NSW Crown Lands , NSW Office of Environment and Heritage, NSW Roads and Maritime Service (Navigation), NSW DPI Fisheries (Marine Vegetation & Fish Habitat)  

Local and State Government Staff

12

$50,000

If REF concludes that project can proceed and all state government approvals are granted proceed to development application

 

 

Development application

Preparation of detailed surveys and design

Coastal Engineer

12

$200,000

Prepare and submit a development application for assessment

Staff and consultants

12

$75,000

If DA is approved

 

 

Project implementation

Preparation and tender selection process for the construction of the groyne

Staff and consultants

6

$35,000

Construction of the 260 metres groyne at O’Keefe’s Point

Civil Engineering Construction Company

12

$9,100,000

Commissioning of the groyne

Staff/Contractor

1

$5,000

Rehabilitation

Environmental Contractor

6

$100,000

Maintenance

Maintenance of groyne (this would be an annual cost or after weather events)

Contractor/Staff

Annually

$150,000

Total cost and timeframe of project

7.3 years

$10,495,000

Figure 9: Breakdown of stages, task, resources, timeframe and costs for the construction of the submerged groyne/wall at O’Keefe’s Point

 

Community Engagement

All parts five (5) parts of the resolutions will require extensive community consultation, with several of Council Flood Risk Management Plans, Entrance Management Policy and the Estuary Management Plan requiring review  and changes. The Proposals for dredging, erosion control and groyne construction at O’Keefe’s Point and the river mouth requiring extensive community consultation in the development stages.

 

Policy Implications

The Shoalhaven River Entrance Management Policy is being undertaken as part of the update the lower Shoalhaven River flood study.  The review of the Shoalhaven River Estuary Management Plan would need to be undertaken, as part of the Coastal Management Program and identified in the coastal scoping study.

 

Financial Implications

The financial cost for implementing and on-going maintenance for the five (5) resolutions would be approximately $69,000,000. As previously stated, the review of the Shoalhaven River Estuary Management Plan, would need be done as part of the Shoalhaven Coastal Management Program, required under the Stage 2 Coastal Management Act reforms. This would have financial implications given the size and complexity of the Shoalhaven River Estuary Management Plan.

 

Risk Implications

The actions within these resolutions pose a high risk to short and long term health of the Shoalhaven River Estuary ecological health. They also would also pose a high social and financial risk to the community and Council both with the upfront and on-going maintenance costs associated with the implementation of the objectives.