Project - Public Information Session 11 December 2014 Purpose of - - PowerPoint PPT Presentation

Project Overview : South East Flows Restoration Project - Public Information Session 11 December 2014

Purpose of the SEFRP

• Primary function is to provide water - currently being

discharged into the ocean near Kingston - to the Coorong South Lagoon.

• This will assist in the protection of the

environmental character of this wetland of international significance by helping keep salinity within a healthy target range

SEFRP channel will also :

• Provide the opportunity to hydrate en route

wetlands

• dependent upon water quality and landholder

agreement

• Decrease outflows from the Blackford Drain

near Kingston

• Rebuild existing drainage infrastructure to

ensure existing drainage service

April 2005 Needles north of Hell’s Gate

Low Barrage Flows

• South Lagoon is particularly

susceptible to significant increases in salinity, during periods of reduced barrage flows

• 2010 the Coorong South Lagoon

recorded extreme hypersaline conditions (over 175 g/L), five times the salinity of seawater.

• Estuarine habitat disappeared

with an ecological crash in both Lagoons occurring.

Salinity

Target range to support a healthy ecosystem in the Coorong South Lagoon is between 60 g/L and a maximum of 100 g/L

CLLMM Recovery Project

• 2009 Long Term Plan for CLLMM region
• Up to $137 million from 1 July 2011 to 30 June 2016
• Compliant
• Compliant but Conditional
• Program Management
• 20 Management Actions that contribute to managing the site for

ecological health and support the Long-Term Plan – community partnerships – stabilising ecological decline – protection of critical environmental assets – infrastructure projects, and – monitoring and research

• Scope, negotiate and implement emerging projects
• Implement a MERI Framework – Mid Program Review

CLLMM Management Actions

Vegetation Program

• Lakebed Stabilisation
• Fencing
• Pest Management
• Community Involvement
• Aboriginal Heritage
• Monitoring & Research

Restoring the Coorong

• South East Flows Restoration

Project

• South Lagoon Salinity Reduction

Scheme Other

• Construction of Fishways
• Critical Fish Habitat
• Ruppia Translocation
• Managing Acid Sulfate Soils
• Research Priorities
• Meningie Wetland
• Lake Albert Scoping Study

‘SEFRP Project Announcement’

• Senator Birmingham & Minister Hunter

announced SEFRP 12 June 2014 as a Deed of Variation to the CLLMM Funding Deed

The SEFRP will design & construct the SEFRP channel which will:

• Replace & upgrade the existing Tilley Swamp

& Taratap Drains (83kms)

• Construct a new channel through the

Murrabinna Flats to connect to the Blackford Drain (12kms)

SEFRP Project Area

Morella Basin Tilley Swamp Taratap Murrabinna/ Lacapede Flats

Blackford Drain outlet Coorong South Lagoon

Additional water to Coorong South Lagoon

• 26.5 Gl/annum (median)
• Expected range between

5 to 45.3 Gl/annum (90% to 10%) Modelling shows that the relative benefit of water from south east to water over barrages to the management of salinity in the Coorong South Lagoon is 40:1

Water to Coorong

Salinity

Target range to support a healthy ecosystem in the Coorong South Lagoon is between 60 g/L and a maximum of 100 g/L Target salinity range for the South Lagoon (60

• 100 g/L).
• Modelled annual salinity cycle in the Coorong South Lagoon for three

scenarios of South East inflow volumes with a barrage inflow of 2,000GL/annum.

• Solid line represents the salinity at the northern end of the South Lagoon
• Dashed line is salinity at the southern end of the South Lagoon

Benefits of channel approach;

• Efficiency of delivery
• Decreased transmission losses
• Flexibility of delivery to environmental assets

with regard to:

– Water quality – Opportunities for diversions to en route wetlands

• Management of inundation of productive land

SEFRP History

• 2007- concept initiated by DWLBC
• Initial SEFRP Steering Committee established

comprising:

– Government, nongovernment, regional stakeholders including regional landowners and traditional owners – At least 11 options considered – Preferred alignment selected November 2011 – Public consultation during 2012 – SEFRP Business Case submitted March 2013

Key criteria for selecting preferred flowpath

• Potential yield to CSL
• En route benefits
• Vegetation clearance
• Cost

Major SEFRP Alignment Options

Preferred Alignment as at November 2011

• Salt Creek to Blackford
• via Tilley Swamp and Taratap Flat
• Blackford to Drain M
• via Reedy Creek

enlarge existing drain, less “greenfields” construction Preferred Alignment as at July 2012

• Salt Creek to Blackford
• via Tilley Swamp and Taratap Flat
• Blackford to Drain M
• via Blackford and Avenue Flat drains

93% of construction on existing drain alignments no diversion from Drain M higher yield to Coorong

No SEFRP project works proposed on Blackford Drain south of Rowney Rd.

• Approved SEFRP Business Case is reduced in

scope

– No activities proposed south of the Blackford Drain – Bakers Range North upgrade not supported

Major SEFRP activities :

• Detailed Design
• Land Acquisition
• Construction
• Development of SEFRP Operations Manual
• Community and landholder engagement

• ther SEFRP activities
• General Approvals
• EPBC Act Referral
• Environmental (construction) monitoring
• Completions & handover process to SEWCDB

Key project delivery matters:

• Tight timelines with completion currently due

December 2016

• Significant interdependencies

Anticipated Project Timeline

Handover to SEWCDB Approvals Detailed Design Land Acquisition Land Settlement Construction Develop Operations Manual 2014/15 2015/16 2016/17 Oversight by SEFRP Steering Committee Community Engagement

Commencement on ground works proposed for spring 2015

All Approvals

• Environment Protection and Biodiversity Conservation Act 1999 (Cth)
• Native Title Act 1993 (Cth) – CSO Advice no Requirement
• Water Act 2007 (Cth)
• Aboriginal Heritage Act 1988 (SA)
• Crown Lands Management Act 2009 (SA)
• Development Act 1993 (SA) – Exempt under Section 49(3)
• Highways Act 1926
• Local Government Act 1999 (SA)
• National Parks and Wildlife Act 1972 (SA)
• Native Vegetation Act 1991 (SA)
• Parliamentary Committees Act 1991 (SA)
• River Murray Act 2003 (SA)

Key Approvals

Legislation Requirement Timeframe

Environment Protection and Biodiversity Conservation Act 1999 (Cth) Under Section 68 of the EPBC Act, proposed actions can be referred to the Minister to determine whether the action is controlled Submit early 2015 Aboriginal Heritage Act 1988 (SA) Cultural heritage clearances required to identify culturally significant sites/objects/remains with a view to minimising potential damage, disturbance or interference. Depending on Survey, Ministerial Authorisation may be required under Section 23. Requirements determined through Heritage Surveys early 2015 – complete by June 2015 Native Vegetation Act 1991 (SA) Approval required for Clearance of Native Vegetation. SEWCD Board has right to clear vegetation under Section 27(1)(b) (pursuant to Regulation 5(1) Native Vegetation Surveys commenced early 2015 to ensure approval before June 2015 Parliamentary Committees Act 1991 (SA) Parliamentary Works Approval required prior to Construction Submission to the Parliamentary Works Committee for approval early- mid 2015 (before June 2015)

• Key approvals listed in the Table below
• A number of other (minor) approvals and notifications are required by June 2015

EPBC Referral

• EPBC Act focus on matters of National Environmental Significance

(e.g. World Heritage Listings; National Heritage Listings; Ramsar Wetlands; Threatened and Migratory Species and Ecological Communities)

• SA Government will refer the Project under the EPBC Act
• Draft Referral is currently being finalised
• Submission expected early 2015
• Public will be able to comment under Commonwealth process

(notification will be on SEFRP website)

SEFRP Detailed Design

• Will include:

– Refined alignment & channel parameters – Specify channel & property infrastructure – Determine land acquisition requirements – Costings

Influences on Detailed Design

• Statutory requirements

– Vegetation clearance requirements, Heritage surveys, EPBC

• Legal responsibilities
• Preliminary Design
• Steering Committee oversight
• En route landholder requirements
• En route local wetland opportunities
• Operations & long-term maintenance
• WHS & Cost

Preliminary Level Designs

• Included:

– Detailed survey – Hydraulic modelling – Modelled different depth/widths – Estimated excavation required – Considered the number / location of crossings & regulators – Considered the impacts on local drainage service

• Allowed the development of cost estimates

SEFRP Preliminary Design Alignment

SEFRP Preliminary Design Alignment

SEFRP Preliminary Design Alignment

SEFRP Preliminary Design Alignment

Capacity of SEFRP channel from Salt Creek to Blackford Drain

Chainage (m) Section Flow capacity (ML/day) Existing Design 0- 8700 Salt Creek Outfall (CSL) – Morella Basin inlet 1,000 1300 8700- 12600 Morella Basin inlet – Martin’s Washpool inlet 520 1300 12600-47100 Martins washpool inlet - to S-Bend junction 130 1300 47100-53100 S-Bend junction – Henry Creek Road (start Taratap Drain) 130 930 53100-63000 Taratap Drain 90 890 63000-72500 Taratap Drain - Taratap Road 45 845 72500-80700 Taratap Drain - end 30 830 80700-93400 Murabinna Flats

• 800

Land Acquisition

• Individual landholder process under powers of

the South Eastern Water and Conservation Act 1992

Thank you