Agenda of Floodplain Risk Management Advisory Committee

Reports submitted to the Floodplain Risk Management Advisory Committee to be held on Thursday 19 October 2023.

Floodplain Risk Management Advisory Committee AGENDA AND BUSINESS PAPER

Thursday 19 October 2023

ORDER OF BUSINESS:

CLAUSE PRECIS PAGE

ACKNOWLEDGEMENT OF COUNTRY 2

APOLOGIES 2

Confirmation of Minutes

CM-1 Floodplain Risk Management Advisory Committee Minutes - 10 August 2023 2

DECLARATIONS OF INTEREST 2

Reports from Staff

RP-1 Floodplain Risk Management Advisory Committee 2024 MEETING SCHEDULE 3

RP-2 2021-22-FM-0032 - Uranquinty Levee Upgrade - Investigation and Design 5

RP-3 2018-19-FM-0071 - North Wagga Flood Mitigation Options 16

RP-4 2021-22-FM-0024 - Glenfield Drain and Flowerdale Storage Flood Mitigation Works 52

RP-5 2021-22-FM-0039 - Lake Albert Flood Mitigation Options - Feasibility Study 54

RP-6 2022-FMP-0103 Humula and Mangoplah Flood Studies 55

RP-7 Local & Regional Risk Reduction Stream - Levee Pump Augmentation 56

RP-8 SW01 - Incarnie Crescent, Stormwater Augmentation - Preparing Australian Communities - Local Grant Scheme 60

RP-9 DPE Floodplain Manual Revision 61

RP-10 Community Development Grant CDG 0789 63

QUESTIONS WITH NOTICE 66

ACKNOWLEDGEMENT OF COUNTRY

APOLOGIES

Confirmation of Minutes

CM-1 Floodplain Risk Management Advisory Committee Minutes - 10 August 2023

Recommendation

That the Minutes of the proceedings of the Floodplain Risk Management Advisory Committee Meeting held on 10 August 2023 be confirmed as a true and accurate record, noting Council’s adoption of these minutes at its meeting on 14 September 2023.

Attachments

1 ⇩.

Floodplain Risk Management Advisory Committee Minutes - 10 August 2023

DECLARATIONS OF INTEREST

Report submitted to the Floodplain Risk Management Advisory Committee on Thursday 19 October 2023. RP-1

Reports from Staff

RP-1 Floodplain Risk Management Advisory Committee 2024 MEETING SCHEDULE

Author: Andrew Mason

Director: Phil McMurray

Analysis:

The Floodplain Risk Management Committee Terms of Reference required the Committee is to meet bi-monthly, as determined by the Committee.

Recommendation

That the Committee endorse the schedule of meeting dates for the next 12 months as outlined in the Report.

Report

A forward meeting plan, including bi-monthly meeting dates, is agreed by the Committee each year. Therefore, the following schedule of meeting dates is proposed for the next 12 months for the Committee’s consideration and endorsement:

Thursday, 7 December 2023	Floodplain Risk Management Advisory Committee
Thursday, 15 February 2024	Floodplain Risk Management Advisory Committee
Thursday, 11 April 2024	Floodplain Risk Management Advisory Committee
Thursday, 23 May 2024	Floodplain Risk Management Advisory Committee
Thursday, 4 July 2024	Floodplain Risk Management Advisory Committee
Thursday, 19 Sept 2024	Floodplain Risk Management Advisory Committee
Thursday, 7 Nov 2024	Floodplain Risk Management Advisory Committee

Meetings are proposed to commence at 8.30am in the Council Meeting Room.

Extraordinary meetings and additional workshops may be held from time to time to discuss specific projects and items as required.

The Committee are advised the 2024 Local Government (General) Election will be held on 14 September 2024, with Councillor membership ceasing as at midnight on 13 September 2024.

In regard to community membership, in accordance with Council’s Appointment of Organisation, Community and Individual Citizen Members to Council Committees Policy and the Floodplain Risk Management Committee Terms of Reference, the Council may by resolution, extend the duration of an existing Council Committee and its membership for a period of not more than six months after the date of a Local Government (General) election.

This extension allows the new Council time to consider and adopt its meeting and Committee structure, also allowing continuity of existing projects being considered by the committee during this time. Therefore, two meetings have been proposed, after the election, being, 19 September 2024 and 7 November 2024.

Financial Implications

N/A

Policy

Local Government Act 1993

Local Government (General) Regulation 2021

Code of Meeting Practice

Floodplain Risk Management Advisory Committee Terms of Reference

Link to Strategic Plan

Community Leadership and Collaboration

Objective: We have strong leadership

Outcome: We are accountable and transparent

Risk Management Issues for Council

No specific issues identified.

Internal / External Consultation

N/A

Report submitted to the Floodplain Risk Management Advisory Committee on Thursday 19 October 2023

RP-2

RP-2 2021-22-FM-0032 - Uranquinty Levee Upgrade - Investigation and Design

Author: Andrew Mason

Director: Phil McMurray

Summary:

The project is progressing as per the required program. Preliminary fieldwork and analysis has been completed.

Recommendation

That the Floodplain Risk Management Advisory Committee receive and note the update provided in relation to the Uranquinty Levee project.

Report

Royal HaskoningDHV (RHDHV) have now completed the majority of the background investigations, this includes:

· Site inspection of the proposed levee alignment.

· Geotechnical investigations and boreholes along the alignment.

· Survey investigation of the levees.

· Services investigation of the levees.

· Review of hydraulic modelling files including results.

RHDHV have commenced with the preliminary design and freeboard analysis and have provided commentary on this in their attached report.

Financial Implications

N/A

Policy and Legislation

N/A

Link to Strategic Plan

Safe and Healthy Community

Objective: Our community feel safe

Be responsive to emergencies

Risk Management Issues for Council

N/A

Internal / External Consultation

N/AN/A

Attachments

1 ⇩.

Uranquinty Levee Upgrade

Report submitted to the Floodplain Risk Management Advisory Committee on Thursday 19 October 2023

RP-3

RP-3 2018-19-FM-0071 - North Wagga Flood Mitigation Options

Author: Andrew Mason

Director: Phil McMurray

Summary:

The project is progressing well and the next stage of the community consultation will commence shortly.

Recommendation

That the Floodplain Risk Management Advisory Committee receive and note the update provided in relation to the North Wagga Flood Mitigation Options Project.

Report

The consultant CIE and Woolcott will be presenting at the meeting.

Their discussion will be centred around the economic analysis of the various mitigation options and the conduct and outcomes of the Public Forum. Woolcott will also be discussing the next steps in the community engagement including the telephone survey, the one-on-one sessions and the online survey.

Financial Implications

N/A

Policy and Legislation

N/A

Link to Strategic Plan

Safe and Healthy Community

Objective: Our community feel safe

Be responsive to emergencies

Risk Management Issues for Council

N/A

Internal / External Consultation

N/A

Attachments

1 ⇩.	North Wagga Flood Mitigation Phase 1 Summary Presentation October 23
2 ⇩.	The CIE Evaluation of flood Mitigation options 16 October 2023

Report submitted to the Floodplain Risk Management Advisory Committee on Thursday 19 October 2023

RP-3

Report submitted to the Floodplain Risk Management Advisory Committee on Thursday 19 October 2023

RP-4

RP-4 2021-22-FM-0024 - Glenfield Drain and Flowerdale Storage Flood Mitigation Works

Author: Andrew Mason

Director: Phil McMurray

Summary:

Lyall and Associates have provided an update on the project.

Recommendation

That the Floodplain Risk Management Advisory Committee receive and note the update provided in relation to the Glenfield Drain and Flowerdale Storage Area Flood Mitigation Works Project.

Report

From Lyall and Associates:

· Council’s Design section provided a set of pdf plans showing the availability of inbank survey of the Glenfield Road Drain where it runs between Red Hill Road and Dobney Avenue. We are awaiting receipt of the survey file in 3D format so that we can incorporate it into the MOFFS model.

· DPS Surveying forwarded the pit and pipe survey data for the various basins on 22/09/2023. We are currently in the process of reviewing the field survey data to identify which pits could not be accessed by DPS Surveying. We will then forward this information to Council’s Design section who will arrange for the lids of the pits to be lifted and for their details to be captured by Council’s surveyors.

· Council’s Design section provided 260 sets (3.36 GB) of design plans showing details of the existing stormwater drainage system in the Glenfield Road Drain catchment to the south (upstream) of the Sturt Highway crossing on Monday 9 October 2023. Having received the drainage plans, we are now in a position to scope the upgrade requirements for the MOFFS model. We will aim to forward a variation request for this work by 18/10/23.

Financial Implications

N/A

Policy and Legislation

N/A

Link to Strategic Plan

Safe and Healthy Community

Objective: Our community feel safe

Be responsive to emergencies

Risk Management Issues for Council

N/A

Internal / External Consultation

N/A

Report submitted to the Floodplain Risk Management Advisory Committee on Thursday 19 October 2023

RP-5

RP-5 2021-22-FM-0039 - Lake Albert Flood Mitigation Options - Feasibility Study

Author: Andrew Mason

Director: Phil McMurray

Summary:

There is a slight delay in this project while the procurement and contract process are finalised.

Recommendation

That the Floodplain Risk Management Advisory Committee receive and note the update provided in relation to the Lake Albert Flood Mitigation Project.

Report

A workplan and cost variation has been submitted to DPE for approval. The procurement process has been finalised and Stantec are beginning to collate data and analyse various flood models for the two creeks and the Lake. Once the workplans are approved then Stantec will begin planning the community consultation with the required key stakeholders and groups.

Financial Implications

N/A

Policy and Legislation

N/A

Link to Strategic Plan

Safe and Healthy Community

Objective: Our community feel safe

Be responsive to emergencies

Risk Management Issues for Council

N/A

Internal / External Consultation

N/A

Report submitted to the Floodplain Risk Management Advisory Committee on Thursday 19 October 2023

RP-6

RP-6 2022-FMP-0103 Humula and Mangoplah Flood Studies

Author: Andrew Mason

Director: Phil McMurray

Summary:

The procurement process has been completed and a preferred consultant has been determined.

Recommendation

That the Floodplain Risk Management Advisory Committee receive and note the update provided in relation to the Humula and Mangoplah Flood Studies Project.

Report

The procurement process for this project has been finalised and a Workplan will be provided to DPE for approval before the consultant is fully appointed to this project. At this point in time the grant for this project is $80,000 and we have expended $26,000 on the procurement of LiDar data. The consultant budget for this project is in excess of $100,000 and so a minor variation will be submitted to DPE as a part of the approval process. The preferred consultant is WMAWater.

Financial Implications

N/A

Policy and Legislation

N/A

Link to Strategic Plan

Safe and Healthy Community

Objective: Our community feel safe

Be responsive to emergencies

Risk Management Issues for Council

N/A

Internal / External Consultation

N/A

Report submitted to the Floodplain Risk Management Advisory Committee on Thursday 19 October 2023

RP-7

RP-7 Local & Regional Risk Reduction Stream - Levee Pump Augmentation

Author: Andrew Mason

Director: Phil McMurray

Summary:

A consultant has been appointed for this project.

Recommendation

That the Floodplain Risk Management Advisory Committee receive and note the update provided in relation to the Levee Pump Augmentation Project.

Report

Stantec have begun work on this project.

The following steps have been completed or are currently underway:

· Site visit to 5 floodgates

· Topographic survey of sites, pipes and levee

· Flood model analysis commenced

· Gate 15A assessment completed

· Gate 15A preliminary drawings 50% complete

There will be a cost variation submitted by Stantec to cover extra work required to finetune the flood model to reflect changes in ground topography and updated LiDAR information.

Financial Implications

N/A

Policy and Legislation

N/A

Link to Strategic Plan

Community leadership and collaboration

Objective: Wagga Wagga has strong community leadership and a shared vision for the future

Plan long term for the future of Wagga Wagga

Risk Management Issues for Council

N/A

Internal / External Consultation

N/A

Attachments

1 ⇩.

WWCC Pump Levee Augmentation 15A - Monthly Report - September 2023

Report submitted to the Floodplain Risk Management Advisory Committee on Thursday 19 October 2023

RP-8

RP-8 SW01 - Incarnie Crescent, Stormwater Augmentation - Preparing Australian Communities - Local Grant Scheme

Author: Andrew Mason

Director: Phil McMurray

Summary:

This project has been handed over to the Sewer and Stormwater team for implementation

Recommendation

That the Floodplain Risk Management Advisory Committee receive and note the update provided in relation to the Incarnie Crescent Stormwater Augmentation project.

Report

The design has been completed and this project is currently with the Council Sewer and Stormwater team for implementation.

Financial Implications

N/A

Policy and Legislation

N/A

Link to Strategic Plan

Community leadership and collaboration

Objective: Wagga Wagga has strong community leadership and a shared vision for the future

Plan long term for the future of Wagga Wagga

Risk Management Issues for Council

N/A

Internal / External Consultation

N/A

Report submitted to the Floodplain Risk Management Advisory Committee on Thursday 19 October 2023

RP-9

RP-9 DPE Floodplain Manual Revision

Author: Andrew Mason

Director: Phil McMurray

Summary:

DPE have issued a new Flood Risk Management Manual.

Recommendation

That the Floodplain Risk Management Advisory Committee receive and note the update provided in relation to the update of the Flood Risk Management Manual by the NSW Department of Planning and Environment.

Report

Flooding results in significant risk to many communities across New South Wales. This risk stems from human interaction with flooding through the occupation and use of floodplains.

Since 1984 the NSW Flood Prone Land Policy (the policy) has set the direction for Flood Risk Management (FRM) in New South Wales. In 1986 the NSW Government released the first Floodplain Development Manual to support policy implementation. The policy and manual have since evolved in response to significant flood events, reviews and improvements in national and international flood risk management practice.

This manual (including the policy) replaces the Floodplain Development Manual (DIPNR 2005) as the NSW Government’s manual relating to the management of flood liable land in accordance with section 733 of the Local Government Act 1993 (LG Act). This provides councils, statutory authorities, and state agencies and their staff, with indemnity for decisions they make and information they provide in accordance with the manual.

Council staff attended an online Webinar that outlined significant changes and revisions within the document.

Council has also lodged an Expression of Interest with DPE to host a regional workshop conducted by DPE staff to further highlight and discuss changes and revisions within the document. If successful, this meeting will take place in Wagga later in the year.

Financial Implications

N/A

Policy and Legislation

N/A

Link to Strategic Plan

Safe and Healthy Community

Objective: Our community feel safe

Be responsive to emergencies

Risk Management Issues for Council

N/A

Internal / External Consultation

N/A

Report submitted to the Floodplain Risk Management Advisory Committee on Thursday 19 October 2023

RP-10

RP-10 Community Development Grant CDG 0789

Author: Andrew Mason

Director: Phil McMurray

Summary:

This Report provides information about the Community Development Grants CDG0789

Recommendation

That the Floodplain Risk Management Advisory Committee receive and note the report in relation to the CDG 0789 grant and program

Report

The current federal government has reviewed this carryover programme and each recipient was tasked with justifying the continuation of the grant for their particular project.

Council was successful in rationalising the need for the continuation of the grant and has been working with the Department of Infrastructure, Transport, Regional Development, Communications and the Arts to finalise a variation to the original grant to allow the project to continue.

Due to the fact that the $1M will need to be fully expended by June 2025, staff have proposed that the money be utilised to repair some known locations where leakage occurs in the North Wagga Levee system, to reline the pipes in the 16 existing floodgates and upgrade the floodgates with new penstock gates similar to those placed on the Main City Levee.

Financial Implications

N/A

Policy and Legislation

N/A

Link to Strategic Plan

Safe and Healthy Community

Objective: Our community feel safe

Be responsive to emergencies

Risk Management Issues for Council

As outlined in the Report.

Internal / External Consultation

N/A