design assistance report · 4.2 construction footprint the development application notes that a...
TRANSCRIPT
Design Assistance Report
Olam Orchards Pump Site
Olam Orchards Australia
04 February 2020
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Document Status
Version Doc type Reviewed by Approved by Date issued
V01 Draft Michael Cheetham Julian Martin 12/07/2019
V02 Final Geoff Rix, James Golsworthy Julian Martin 19/07/2019
V03 Revised Final
Project Details
Project Name Olam Orchards Pump Site
Client Olam Orchards Australia
Client Project Manager Geoff Rix
Water Technology Project Manager Julian Martin
Water Technology Project Director Michael Cheetham
Authors Julian Martin and Tom Atkin
Document Number 19010119-01_R01V03 Olam Pump.docx
COPYRIGHT
Water Technology Pty Ltd has produced this document in accordance with instructions from Olam Orchards Australia for
their use only. The concepts and information contained in this document are the copyright of Water Technology Pty Ltd.
Use or copying of this document in whole or in part without written permission of Water Technology Pty Ltd constitutes an
infringement of copyright.
Water Technology Pty Ltd does not warrant this document is definitive nor free from error and does not accept liability for
any loss caused, or arising from, reliance upon the information provided herein.
First Floor, 40 Rowan Street Head Office:
Wangaratta VIC 3677 15 Business Park Drive
Telephone (03) 5721 2650 Notting Hill VIC 3168
ACN 093 377 283
ABN 60 093 377 283
Julian Martin Julian Martin 04/02/2020
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CONTENTS
1 INTRODUCTION 3
1.1 Project Context 3
1.2 Project Scope 3
2 SITE SETTING 4
2.1 Dominant Geomorphic Processes 4
3 SITE DESCRIPTION 6
3.1 Overview 6
4 DESIGN INPUTS AND CONSIDERATIONS 8
4.1 Site Constraints 8
4.2 Construction Footprint 8
4.3 Rock Beaching 9
5 RECOMMENDED REVISED DESIGN ARRANGEMENT 11
5.1 Overview 11
5.2 Revised Design Arrangement 11
5.3 Response to the Department’s Comments 13
APPENDICES
Appendix A Development Application
Appendix B Department Email Response
Appendix C Survey
Appendix D Recommended Design Arrangement
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1 INTRODUCTION
This report has been prepared by Water Technology on behalf of Olam Orchards Australia Pty Ltd. The report
provides design assistance relating to erosion adjoining an irrigation pump on the Victorian side of the Murray
River, situated on Crown Land and adjoining the Murray Valley Highway at Narrung.
1.1 Project Context
Olam Orchards has sought to install rock beaching on a discrete section of left right river bank on the Murray
River, adjoining an existing pump site. A Development Application (James Golsworthy Consulting, 2018) and
design associated with proposed works was submitted to the NSW Department of Industry – Lands and Water
(the Department) for approval. Both the Development Application and design are provided for reference in
Appendix A. In summary, the proposed works involved:
◼ The placement of rock beaching immediately beneath and surrounding the pump station.
◼ The placement of steel sheetpile across the bank toe/pump inlets to support the rock beaching.
◼ The Department subsequently did not grant approval for the design due to a number of concerns. The
Department response, received via email (dated 20th February, 2019), is provided for reference in
Appendix B.
1.2 Project Scope
The intent of this report is to identify a revised design arrangement on behalf of Olam Orchards that meets the
requirements of the Department. Specifically, the project scope has included:
◼ Correspondence with the Department to clarify their expectations regarding a revised submission. This
has included several phone calls and email correspondence with:
◼ Jarrod Smith – Acting Property Management Project Officer – Far West.
◼ Caitlin Maher – Acting Senior Natural Resource Management Officer.
◼ A site visit, undertaken with Geoff Rix (Olam Orchards) to gain an appreciation of the erosion processes,
site conditions and features and inform a potential alternate design arrangement.
◼ The preparation of a concise report, outlining:
◼ Observations collected during the site visit, including the observed erosion processes, site conditions
and features.
◼ A recommended design approach to support a revised detail design arrangement.
This report has been updated upon receiving a feature survey of the subject site.
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2 SITE SETTING
2.1 Dominant Geomorphic Processes
In general, bank erosion on river systems can occur in response to a number of different processes and in a
variety of forms. Within the vicinity of the subject site, the Murray River is a laterally migrating river system
that has naturally evolved through the migration of meander bends (Figure 2-1). Lateral migration involves the
movement of a meander bend in an outward and downstream direction that results in corresponding deposition
on the opposite bank. Erosion on the outside of meander bends is a natural process of channel planform
change. Erosion is expected at the outside of bends, as it is an area in increased flow velocity. Likewise,
deposition is expected on the inside of the bend, as it is an area of reduced flow velocity.
Like many pumps adjacent river systems, the Olam Orchards pump is situated on an outside bend of the river,
benefiting from the increased channel depth, associated with an in-channel pool that naturally occurs on
outside bends of river systems (Figure 2-2). However, the structural integrity of the pump is at long term risk
of continued lateral migration of the river.
FIGURE 2-1 SITE LOCATION (SOURCE: GOOGLE EARTH).
Pump location
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FIGURE 2-2 DOWNSTREAM VIEW OF THE PUMP, SITUATED ON AN OUTSIDE BEND OF THE MURRAY RIVER ON THE VICTORIAN FLOODPLAIN.
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3 SITE DESCRIPTION
3.1 Overview
A site inspection of the pump site and surrounds was undertaken on the 8th May 2019. Present during the
site inspection were Geoff Rix (Irrigation Infrastructure Manager, Olam Orchards) and Julian Martin (Principal
Waterway Engineer and Fluvial Geomorphologist, Water Technology).
The key observations made during the site inspection are summarised by the following points and in Figure 3-1
to Figure 3-2.
◼ In its current form, the pump station comprises:
◼ An electric pump and control room/shed situated on a concrete pad, adjoining the top of the river
bank.
◼ Three pipes that extend from the control room/shed and into the river.
◼ Ten vertical pylons, driven into the river/bank face to support the pipework.
◼ The pump station is located on Crown land amongst a River Red Forest.
◼ The River Red Gums typically extend to the top of river bank across the outside bend (both upstream and
downstream of the pump site). Occasional River Red Gums are present on the bank face. The River Red
Gums on the bank face and those immediately adjacent the top of bank commonly have exposed roots.
The presence of established River Red Gums on the bank face with exposed roots, indicate that whilst
erosion is occurring across the meander bend, the process is occurring at a rate that is slow enough to
facilitate vegetation establishment on the bank face.
◼ The bank erosion occurring at the pump site extends to the top of bank, which has subsequently exposed
the building plastic beneath the concrete pad and slightly undermined the pad itself.
◼ The bank erosion occurring immediately beneath the pump site appears to have occurred response to a
number of different processes, including:
◼ Fluvial scour/attrition of the bank face. This involves the direct removal of individual particles from the
face and/or toe of the bank by the action of flowing or moving water and is consistent with the lateral
migration process outlined in Section 2.1.
◼ Undercutting of the bank face. This is a form fluvial scour/attrition and is associated with the
preferential erosion of bank at the water surface where flow rates are sustained for a period of time.
◼ Cracking of the bank face associated with the shrink-swell properties of the bank material.
◼ Minor slaking/dispersion of the bank material.
◼ Surface run-off from the concrete pad that passes over the bank face.
◼ Backwash from the pumps that discharged flows over the bank face. This action is associated with a
previous operating regime that no longer occurs.
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FIGURE 3-1 UPSTREAM VIEW OF THE PUMP SITE, DEMONSTRATING THE PUMP ARRANGEMENT.
FIGURE 3-2 VIEW OF THE BANK FACE IMMEDIATELY BENEATH THE PUMP ILLUSTRATING THE VARIOUS EROSION MECHANISMS.
Cracking
Undercutting
Run-off
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4 DESIGN INPUTS AND CONSIDERATIONS
This section discusses the potential design arrangements with regards to Olam Orchards requirements and
the Department’s response to the Development Application and design.
4.1 Site Constraints
Site access requirements and restrictions are summarised in the Development Application (attached in
Appendix A). Of note, the pipework will not be removed during the installation of proposed rock beaching
works due to prohibitive costs associated with their temporary removal and to maintain pumping capacity
during the construction activities. Hence, the construction methods need to account for the presence of the
pipe work during construction.
4.2 Construction Footprint
The Development Application notes that a Crown Lands Licence was issued for the pump station to the then
asset holder (Timbercorp) in 2008. The original licence identifies a licence area of 250m2. However, only an
indicative marking on a map identifies the licence area (reproduced in Figure 4-1). That is, a precise location
of the licence area is not provided in the original licence.
The Department’s response to the Development Application regarding the Licence area stated: The
Department would not be able to validate a licence for any works outside of the current licence area due to
Native Title considerations. Any works proposed to stabilise the bank would need to occur completely within
the current licence area.
It was subsequently clarified by the Department that the 250m2 is considered to be the area of the existing
footprint of the pump station, in addition to the area of any bank stabilisation works that sits at or below the full
regulated flow water surface elevation. That is, the portion of the pump station that sits above the full regulated
flow water surface elevation (the electric pump and control room/shed situated on a concrete pad, situated on
the Victorian floodplain immediately adjoining the river) is not included within the 250m2 area.
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FIGURE 4-1 THE LOCATION OF THE LICENCE AREA, REPRODUCED FROM THE ORIGINAL CROWN LAND PUMP LICENCE.
4.3 Rock Beaching
The proposed stabilisation method of protecting the pump station involves the placement of rock beaching.
Rock beaching (also known as rock rip rap or rock revetment) involves the placement of quarried, angular rock
against a stream bank to prevent further erosion of the bank in the medium term (Figure 4-2). The rock is
graded and placed to a design thickness to ensure that it forms an interlocking mass and not easily washed
away. A foundation of rock is usually placed across the river bed to ensure that scour of the bed does not
undermine the rock beaching. River health works often undertaken to complement rock beaching include
stock management (fencing) and revegetation where appropriate.
Historically rock beaching has been the most commonly applied technique in addressing bank erosion within
river systems. Rock beaching is a favoured technique of river managers and landholders alike, primarily due
to its lack of design and maintenance requirements in addition to its ability to address multiple erosion
processes. Therefore, rock beaching is generally successful in achieving its intent of halting bank erosion and
does not require the mechanism of erosion to be identified.
Formally designed rock beaching involves undertaking a hydraulic analysis to determine an appropriate rock
size and finished batter slope. In context of the subject site, the finished batter slope of any rock beaching
works is restricted by the presence of the pump station on the top of bank. Additional stabilisation measures
will be incorporated into the design to ensure the rock remains stable (Section 5.2).
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Commonly, fine sediment is be placed over the rock beaching subsequent to installation to encourage
vegetation establishment on the rock beaching face. Such works have the potential to improve the riparian
health and soften the aesthetic impacts of the rock beaching.
FIGURE 4-2 AN EXAMPLE OF ROCK BEACHING WORKS, RECENTLY INSTALLED TO PROTECT A HIGH VALUE LEVEE ON THE OVENS RIVER, WANGARATTA.
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5 RECOMMENDED REVISED DESIGN ARRANGEMENT
5.1 Overview
This section summarises a recommended design approach to support a revised detail design arrangement.
The recommended design approach has been developed with reference of:
◼ The observed erosion processes, site conditions, features and constraints associated with the subject
site.
◼ The Department’s comments regarding a revised submission.
◼ Olam Orchard’s site objectives.
◼ A feature survey of the subject site captured on 22nd November 2019 (provided in Appendix C).
For clarity, a response to each of the Department’s comments (attached in Appendix B) is provided in Section
5.3.
5.2 Revised Design Arrangement
A recommended revised design arrangement is provided in Figure 5-1 and Appendix D. Overall, the revised
design arrangement represents a considerable reduction in the overall construction footprint. The proposed
rock beaching has been specifically designed to:
◼ Limit the design footprint to equal to or less than 250m2 as required by the NSW Crown Lands Licence.
◼ Eliminate the need to remove the existing pipes from the pump station to place the rock.
◼ Allow for the rock beaching works to be decommissioned at the end of life. This means that there is no
excavation into the bed, bank or floodplain surfaces.
The rock beaching design drawing is provided in Appendix D and key aspects of the design are provided in
the following points:
◼ A retaining wall is to be constructed between the two existing columns that are located second from the
bank top of bank. The retaining wall will allow the top section of the bank (which is more prone to erosion)
under the pipes to be rock armoured without removing the pipes and extending the rock beaching to the
toe of the bank.
◼ The retaining wall is to consist of five additional steel beams that are to be attached to the existing
columns. The beams are to extend approximately 1m either side of the columns.
◼ Steel plates are to be welded to the existing columns. The beams are to be subsequently bolted to the
steel plates.
◼ The spacing between the beams is to be no greater than 200mm to ensure rock does not slip through the
gap between the beams.
◼ The lowest beam is to sit on the bank surface to account for any minor bank scour that may occur on the
riverward side of the retaining wall.
◼ The rock beaching is to extend approximately 4m upstream and downstream of the existing infrastructure.
This rock beaching is to transition and marry into the existing bank profile at the upstream and downstream
extents. The longitudinal extent of this rock beaching has been limited to ensure the design footprint does
not exceed 250m2 (Figure 5-1).
◼ The rock beaching on either side of the existing infrastructure is to extend to the toe of the bank. A rock
ledge is to be formed at the toe of the rock beaching to provide a firm foundation for the rock beaching.
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This foundation of rock has been designed in context of the feature survey and is necessary to ensure
that scour of the bed does not undermine the rock beaching.
◼ The rock beaching is to have a finished batter slope of no steeper than 1.5(H):1(V).
◼ The rock beaching is to extend to the top of the bank.
◼ The rock used of the work is to have a D50 of 400mm.
◼ Geofabric was incorporated into the original design to account for moderately dispersive sediments in a
section of the bank profile. The geofabric would have been situated at the interface of the rock work and
in-situ bank sediments and therefore not visible upon completion of the works. Geofabric will not be
incorporated into the revised design arrangement.
◼ Fine sediment may be placed over the rock beaching subsequent to installation to encourage non-woody
vegetation establishment on the rock beaching face. Such works have the potential to improve the riparian
health and soften the aesthetic impacts of the rock beaching.
FIGURE 5-1 PLAN VIEW OF THE RECOMMENDED REVISED DESIGN FOOTPRINT (250M2), REPRESENTED BY THE RED POLYGON, SUPERIMPOSED OVER THE RECOMMENDED DESIGN ARRANGEMENT.
250m2
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5.3 Response to the Department’s Comments
To ensure clarity and demonstrate willingness to address the comments provided by the Department, the
following summary provides a response to each of the Department’s comments provided in the email (dated
20th February, 2019 and attached in Appendix B).
TABLE 5-1 DEPARTMENT COMMENTS AND RELEVANT RESPONSES.
Department Comment Response
Bank erosion on the bends of the Murray River
is a natural process, which can be accelerated
from the periodic flooding and drying of the
river. The stabilisation of 20 metres of
riverbank on the outside of a bend would have
a significant impact on this process and create
unintended detrimental impacts downstream.
Within the vicinity of the subject site, the Murray River is a
laterally migrating river system that has naturally evolved
through the migration of meander bends (refer to Section
2.1). Lateral migration involves the movement of a
meander bend in an outward and downstream direction
that results in corresponding deposition on the opposite
bank. The outside bend of the Murray River which
encompasses the subject site extends for approximately
one kilometre in length. The armouring of the bank
immediately surrounding the pump station over a length of
approximately 20m will not impact upon the migration of the
overall meander bend. The discrete rock work is unlikely
to have any significant effect downstream due to:
◼ Loose angular quarry rock has the ability to
accommodate minor channel adjustments.
◼ The finished rock beaching arrangement shall be fully
keyed into the surrounding surfaces and not left proud.
◼ The works will be subject to monitoring. Maintenance
works shall be undertaken as required.
There is no mention of hydrological modelling
in the SEE to show that there would be no
detrimental impacts on the bank and bed.
A quantitative analysis of the proposed works arrangement
through hydraulic modelling of the site requires accurate
representation of the channel geometry and pump station
arrangement and dimensions (amongst other data inputs).
This would be a difficult task as the existing pump
arrangement would be challenging to explicitly incorporate
into a cost-effective hydraulic analysis. Consequently, such
an analysis would generally not produce reliable results. In
most instances, a qualitative analysis involving geomorphic
interpretation of the subject site and surrounding reach
relative to the proposed works provides a more reliable
analysis of potential impacts to river health. Subject to the
works being installed in accordance with the design and
appropriate construction methods, it is unlikely there will be
detrimental impacts to river health due to the reasons
outlined in this table.
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Department Comment Response
a. …the geotextile fabric will change the
scenic values of the area.
b. Geofabric was incorporated into the original design to
account for moderately dispersive sediments in a
section of the bank profile. The geofabric would have
been situated at the interface of the rock work and in-
situ bank sediments and therefore not visible upon
completion of the works. Geofabric will not be
incorporated into the revised design arrangement.
There is no evidence presented in the SEE
that the sheet piling six metres into the river
will not create a groyne, which would likely
then create erosion and deposition hazards in
the river. In conjunction with the potential
groyne, the rock beaching could result in the
formation of an eddy, which will further
contribute to erosion. Increased deposition of
sediment from decreased flow velocities could
also be an impact from the proposed
development.
The revised design arrangement shall incorporate the
following design arrangement to avoid detrimental
localised hydraulic effects:
◼ The revised arrangement reduces the footprint of the
proposed rock beaching works such that the rock
matches the existing bank profile and no longer
protrudes so far into the river channel.
◼ Sheetpile will not form part of the revised design
arrangement.
◼ The proposed retaining walls sit immediately beneath
the existing pump station framework.
◼ Further specific recommendations that will be included
within the detail design arrangement shall include that
the finished rock beaching arrangement should be fully
keyed into the surrounding surfaces and not left proud.
Subject to these elements being incorporated into the
construction, the proposed works will not cause detrimental
localised hydraulic effects. Further information relating to
the revised design arrangement is provided in Section 5.2.
Additionally, the revised design arrangement does not
present an increased navigation hazard for the reasons
outlined in the points above.
A rehabilitation plan would also need to be
formulated to detail how the licence holder
plans to remove material associated with the
proposed works should the licence no longer
be required.
The licence is currently critical to Olam Orchards
operations and will be required for the foreseeable future.
The proposed rock beaching has been specifically
designed to Allow for the rock beaching works to be
decommissioned at the end of life. This means that there is
no excavation into the bed, bank or floodplain surfaces.
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Department Comment Response
The Department would not be able to validate
a licence for any works outside of the current
licence area due to Native Title
considerations. Any works proposed to
stabilise the bank would need to occur
completely within the current licence area.
Relevant information relating to this comment is provided
in Section 4.2 and Section 5.2 of this report. In summary,
the combined area of the existing pump station that sits at
or below the full regulated flow water surface elevation and
the rock beaching is approximately 220m2. Therefore, on
the basis of the clarification provided by the Department,
the proposed works shall fit within the 250m2 licence area.
Beaching stone and materials will need to be
washed to ensure no additional silt or
biological risks are introduced to the river
system.
The detail design will include a number of design notes with
the construction drawings. Specifically, the above comment
will be addressed by the following note:
◼ The rock used for the works shall be hard, durable and
angular in shape, free from cracks, overburden, shale
and organic matter (Appendix D).
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APPENDIX A DEVELOPMENT APPLICATION
Development Application Crown Land – Weimby Road Balranald
February 2020
planning & development specialists www.jgconsult.com.au
Ref: 18-004 2 Development application statement of environmental effects – Olam Orchards
James Golsworthy Consulting
152 Madden Avenue Mildura VIC 3500 PO Box 1650 Mildura VIC 3502
t 03 5022 8411 e [email protected] ©Copyright, James Golsworthy Consulting Pty Ltd (2020). This work is copyright. Apart from any use as permitted under Copyright Act 1963, no part may be reproduced without written permission of James Golsworthy Consulting Pty Ltd. Disclaimer: Neither James Golsworthy Consulting Pty. Ltd. nor any member or employee of James Golsworthy Consulting Pty. Ltd. takes responsibility in any way whatsoever to any person or organisation (other than that for which this report has been prepared) in respect of the information set out in this report, including any errors or omissions therein. James Golsworthy Consulting is not liable for errors in plans, specifications, documentation or other advice not prepared or designed by James Golsworthy Consulting.
Ref: 18-004 3 Development application statement of environmental effects – Olam Orchards
Table of Contents
Introduction ...................................................................... 4
Location of works .............................................................. 5
Proposal ........................................................................... 6 Project Justification .................................................... 6
Plan of works .................................................................... 7 Stage 1 Procurement of materials and works depot set up ......................................................................... 7 Stage 2 Site preparation (2 days) .............................. 7 Stage 4 Installation of retaining structure underneath pump columns (5 days) .............................................. 7 Stage 6 Placement of rock beaching (10 days) ......... 7 Stage 7 Reinstatement and site clean-up (2 days) .... 8
Site Rehabilitation Plan .................................................... 9
Planning controls ............................................................ 10 Definition ........................................................................................... 10 Zoning ............................................................................................... 10 Additional mapping ............................................................................ 10 Murray Regional Environmental Plan NO.2 – Riverine land ................. 11 Aboriginal cultural heritage ............................................................... 11 Water Management Act ..................................................................... 11 Crown Lands Act ................................................................................ 11
Site and surrounding area ............................................... 13 Locality and subject site ..................................................................... 13
Planning assessment ...................................................... 14 Policy context ..................................................................................... 14 Aboriginal Cultural Heritage............................................................... 14 Fauna assessment ............................................................................. 14 Murray REP No2 ................................................................................. 14
Access...................................................................... 14 Bank disturbance ..................................................... 14 Flooding ................................................................... 14 Land degradation ..................................................... 15 Landscape ............................................................... 15 River related uses .................................................... 15 Settlement ................................................................ 15 Water quality ............................................................ 15
Wetlands .................................................................. 15 Balranald LEP .................................................................................... 15
Conclusion ...................................................................... 17
List of Figures Figure 1 The pump site location. Access to the site is via unnamed dirt tracks approximately 2.1 km east of the Murray Valley Highway ................................................................. 5 Figure 2 Works site location (red arrow) ............................... 5 Figure 3 View of the pump station looking upstream. ....... 5 Figure 4 Pump site in 2013 without erosion ........................ 6 Figure 5 Pump site in 2018 with erosion .............................. 6 Figure 6 Plan of proposed works (amended) ...................... 7 Figure 7 The clearing to the eastern side (upstream) ....... 7 Figure 8 Zone map .................................................................. 10 Figure 9 AHIMS search result for the site. ......................... 11 Figure 10 The approach track to the pump station ......... 13 Figure 11 Pump station looking downstream of the site 13 Figure 12 The pump column support gantry .................... 13
Ref: 18-004 4 Development application statement of environmental effects – Olam Orchards
Introduction
Olam Orchards is seeking development approval to undertake remedial works at one of its pump stations located on crown land on the Murray River. The pump station is located partly in Victoria and partly in New South Wales. The location is adjacent to Narrung in Victoria and the pump supplies irrigation water to Olam Orchards’ almond plantations at Narrung. Access to the site is from the southern side of the Murray River. No road access is possible from New South Wales. The pump station was originally built in 2008 by its then owner, Timbercorp. A Crown Lands Licence was issued for the site at that time (Lic. Number RI537218). Olam Orchards assumed control of the site in 2011. The pump station is located on an outside bend of the river. This means that it is subject to higher relative flows at all times. This is causing erosion to the bank and is beginning to undermine the foundations of the pump station itself. If action is not taken the future viability of the site will come under threat. Olam Orchards has sought the advice of qualified engineering and geomorphological consultants who have developed a remediation plan that is designed to repair the existing damage and to prevent further damage to the site and its infrastructure.
The works planned for the site are centred on the placement of rock beaching over the profile of the riverbank. This will have the effect of filling in the voids that have eroded underneath the slab and provide ongoing protection against further erosion.
These works will take place from the top of the high bank down to the riverbed. As such they are located within NSW. Access to the site will principally be via the existing river access tracks in Victoria. The contractor may also have a works barge in the river at the site to assist with various activities and tasks as needed.
The construction activities are expected to take approximately 3 weeks. Following consideration of the Balranald LEP, Murray REP No. 2, relevant SEPPs, integrated approval requirements and other documents, the proposal to rehabilitate the site is worthy of support. It will not have any significant impacts upon the environment or adjoining land. The proposal is consistent with the Balranald LEP and should be supported through the issue of development approval.
Ref: 18-004 5 Development application statement of environmental effects – Olam Orchards
Location of works
The site is contained within Lot 6858 DP48114, Parish of Weimby, County of Caira, and is within the NSW Western Lands. The site is approximately 31km southwest of the township of Balranald. The proposed activity area is an existing pump station site located on the bank of the Murray River. Consequently, the site straddles the Victorian / New South Wales state border. The pump motors and pump control infrastructure are located in the Victorian section of the site at the top of the bank. The pump columns, wet ends and suction extend down the river bank into the Murray River and constitute the components located in New South Wales. The New South Wales’ portion land at the site is included in zone W1 Natural Waterways. Road access to the site is limited to the Victorian side via an unnamed dirt road that leads off the Murray Valley Highway at Narrung, Victoria.
Figure 1 The pump site location. Access to the site is via
unnamed dirt tracks approximately 2.1 km east of the Murray Valley Highway
Figure 2 Works site location (red arrow)
Figure 3 View of the pump station looking upstream.
Ref: 18-004 6 Development application statement of environmental effects – Olam Orchards
Proposal
Project Justification The proposed works are crucial to the ongoing viability of the site and for the almond enterprise that it supports. Erosion at the site is undermining the foundations that support the pumps and the control buildings. This process was exacerbated during the 2016-2017 minor flood event. It is estimated that approximately 1100mm of horizontal bank profile has been lost over the past four years (see Figs 4 & 5). The foundations that support the weight of the pump motors and the control room are now being undermined as the soil that originally supported them is now being removed through erosion. This process will continue unless remedial actions are carried out. The proposed works at the site will require the use of heavy plant and equipment which will access the site from the Victorian site. A works barge may be positioned in the river to assist with various aspects of the works, if required. Olam Orchards has entered into an agreement with the neighbouring Victorian landholder to utilise his land as a base for laydown and storage. This freehold land is located some 220m from the river and this site will form the works depot.
Figure 4 Pump site in 2013 without erosion
Olam Orchards commissioned a specialist engineering study of the site. The project brief was to provide a solution to the problem of erosion at the site while keeping in mind the site’s unique cultural, environmental and recreational values. Water Technology was awarded the design contract. Their report and design plans have been appended.
Figure 5 Pump site in 2018 with erosion
Ref: 18-004 7 Development application statement of environmental effects – Olam Orchards
Plan of works
The aim of the intended works is to prevent further erosion damage to the part of the riverbank that directly supports the pump station. A broad outline of the works to be performed at the site is listed below.
Figure 6 Plan of proposed works (amended)
Stage 1 Procurement of materials and works depot set up Prior to the commencement of any works within the activity area, a storage and laydown area will be established on the adjoining private property located some 220 metres from the pump station. This site will serve as the storage area for the materials, machinery and plant materials that will be required and used during the proposed works.
Stage 2 Site preparation (2 days) The activity area will undergo pre-construction preparations prior to the commencement of any works at the site. During this stage, the site will be clearly defined, with activity areas clearly marked. ‘No go’ areas will be cordoned off with temporary marking tape. Parking and operational areas will be clearly identified.
Figure 7 The clearing to the eastern side (upstream)
Stage 4 Installation of retaining structure underneath pump columns (5 days) Workers will attach horizontal steel supports to the existing pump gantry. These supports will retain the rock beaching and prevent it from entering the river underneath the suction intakes. This retaining structure will consist of five steel beams spaced 200mm apart and will be bolted to steel plates welded to the support pylons. The horizontal steel beams will extend 1 metre either side of the pylon structure.
Stage 6 Placement of rock beaching (10 days) Beaching rock will be transported to the site from the laydown area some 200metres south of the site. The beaching material will consist of graded bluestone ranging in size from 50mm to 150mm. A long-reach excavator will be positioned at the top of the bank and will place the beaching material at the toe of the bank below the waterline. Once the initial rocks are stabilised on the riverbed, the beaching material will be positioned at its natural angle of repose to allow it to build up and cover the bank profile all the way to the top of the riverbank
Ref: 18-004 8 Development application statement of environmental effects – Olam Orchards
A total of 1300 tonnes of beaching rock will be placed on the sloping riverbank from the top of the bank down to below the waterline to the toe of the bank.
Stage 7 Reinstatement and site clean-up (2 days) Once the beaching is in place, the site will be returned to as natural condition as possible. All excess materials will be removed and disposed of appropriately. All machinery, plant and equipment will be removed from the site.
Ref: 18-004 9 Development application statement of environmental effects – Olam Orchards
Site Rehabilitation Plan
Olam Orchards have a no plans to discontinue irrigation pumping at the site. However, in the unlikely event that this should occur, Olam Orchards have developed a comprehensive site rehabilitation plan to return the site to as close to its pre-development condition as possible. Works included in the rehabilitation plan include the following:
Site de-energising: disconnection of electrical supply, followed by the removal of electrical supply infrastructure.
Removal of above ground infrastructure. This includes all of the pumping and pump control components. It also includes all of the support gantry and elevated support platform.
Removal of all rock beaching from the site.
Removal of the concrete slab
Site revegetation and management
A copy of the Site Rehabilitation Plan is appended.
Ref: 18-004 10 Development application statement of environmental effects – Olam Orchards
Planning controls
Definition The works are defined as a Water Supply System for which the LEP provides the definition as: any of the following: (a) a water reticulation system, (b) a water storage facility, (c) a water treatment facility, (d) a building or place that is a combination of any of the things referred to in paragraphs (a)–(c).
Zoning In accordance with the Balranald LEP zoning maps the land is contained within zone W1 Zone – Waterways.
Figure 8 Zone map The objectives of zone W1 is: To protect the ecological and scenic values of natural waterways. To prevent development that would have an adverse effect on the natural values of waterways in this zone. To provide for sustainable fishing industries and recreational fishing. Development consent is required under zone W1 for the Water Supply System.
Other relevant clauses from the LEP are as follows:
6.2 Riparian land, waterways and groundwater vulnerability
6.5 Development on riverfront areas
6.6 Development on riverbeds and banks
6.7 Earthworks
An assessment of the relevant clauses is outlined below.
Additional mapping The land is affected by the following mapping in addition to the zoning of the land.
Riparian lands and watercourse
Wetlands
Ref: 18-004 11 Development application statement of environmental effects – Olam Orchards
Murray Regional Environmental Plan NO.2 – Riverine land This plan applies to the area covered by the Balranald Shire Council and is applicable in the assessment of this proposal. The objectives of this plan are: (a) to ensure that appropriate consideration is given to
development with the potential to adversely affect the riverine environment of the River Murray, and
(b) to establish a consistent and co-ordinated approach to environmental planning and assessment along the River Murray, and
(c) to conserve and promote the better management of the natural and cultural heritage values of the riverine environment of the River Murray.
The plan outlines specific principles and planning controls that apply to this proposal and consultation which is required under the plan. Clause 12 does not specifically identify consultation for a water supply system. Clause 14 provides direction for the setback of development.
Aboriginal cultural heritage All Aboriginal cultural heritage is protected by the NSW National Parks and Wildlife Act 1974. Responsibility rests with the proponent of a development to demonstrate that due care and diligence have been taken to identify and avoid impacts on archaeological sites through construction works. Clause 80B of the NSW National Parks and Wildlife Regulations 2009 lists a number of low impact activities that remove the need to follow the due diligence process. Maintenance of existing services including water utilities on land that has already been disturbed is defined as a low impact activity under of Clause 80B(1)(a)(ii) of the NSW National Parks and Wildlife Regulations 2009 and thus a defence to a prosecution for harming an Aboriginal object under section 86(2) of the NSW National Parks and Wildlife Act 1974. Accordingly, the proposed remediation works at this site on the Murray River are maintenance of an existing water supply service and is considered a low impact activity. Therefore, it does not require the Due Diligence Code of Practice for the Protection of Aboriginal Projects in New South Wales (DECCW 2010).
A search of the AHIMS database was conducted. The search revealed that no records of Aboriginal sites, places or heritage objects have been recorded or declared at or near the location of the proposed works.
Figure 9 AHIMS search result for the site.
Water Management Act A controlled activity approval authorises its holder to carry out a specified controlled activity at a specified location in, on or under waterfront land. Under the Water Management Act 2000 (WM Act), a controlled activity means:
the erection of a building or the carrying out of a work (within the meaning of the Environmental Planning and Assessment Act 1979), or
the removal of material (whether or not extractive material) or vegetation from land, whether by way of excavation or otherwise, or
the deposition of material (whether or not extractive material) on land, whether by way of landfill operations or otherwise, or
the carrying out of any other activity that affects the quantity or flow of water in a water source.
Crown Lands Act The area of the pump site and suctions benefit from a licence under the Crown Lands Act. The licence is in the name of the landowner (as opposed to the lessee being
Ref: 18-004 12 Development application statement of environmental effects – Olam Orchards
Olam Orchards). A copy of the licence is appended to the application.
Ref: 18-004 13 Development application statement of environmental effects – Olam Orchards
Site and surrounding area
Locality and subject site The area of the pump and suction is located in and abutting the Murray River. The vegetation in this area consists mainly of mature riparian woodland and is dominated by E. camaldulensis. These woodlands extend along both sides of the river in this location. The region along the river is highly valued as a recreational resource. Further away from the riparian corridor, the land has been highly modified for various agricultural and horticultural purposes. The immediate site consists a compound that contains two small buildings housing the electrical transformer and pump control room. At the edge of the river bank a gantry supports three pump motors. Each of these are connected to a pump column that extend down the riverbank to below the water line. These columns are supported on pylons and rails. The pumps discharge into a manifold that delivers the water into the delivery mains that head away from the pump station on a southwest alignment. The area has been subject to previous high-level disturbance through the initial construction of the pump station.
Figure 10 The approach track to the pump station
Figure 11 Pump station looking downstream of the site
Figure 12 The pump column support gantry
Ref: 18-004 14 Development application statement of environmental effects – Olam Orchards
Planning assessment
Policy context An extensive consultation and engagement program was undertaken as part of the original approvals process. Key stakeholders were approached and provided with detail information concerning the nature and scope of the project. In addition to this, formal pre-application meetings were held on site and were attended by all relevant Victorian and NSW authorities. The original application to construct the pump station was supported by a number of specific assessments. These included cultural heritage, flora and fauna and construction related impacts. These reports provided justification for the design and siting of the proposed works and concluded that the impacts would be relatively low impact and were further mitigated and controlled through the conditions of the relevant approvals.
Aboriginal Cultural Heritage The works have been determined to be a low impact activity under Clause 80B(1)(a)(ii) of the NSW National Parks and Wildlife Regulations 2009. Accordingly, the proposed works are not required to follow the Due Diligence Code of Practice for the Protection of Aboriginal Projects. No cultural heritage objects were identified during the construction works of the pumps station in 2008. The plan of works for the proposed remedial works does not involve any further excavation. As search of the AHIMS site has revealed that there are no cultural heritage objects recorded at or near the site.
Fauna assessment An assessment of flora and fauna items was undertaken also prior to the original application. The assessment concluded the proposed development will not result in any significant habitat destruction, loss of biodiversity, habitat fragmentation, spread of exotic species or a decline in water quality or altered flow.
Murray REP No2 The Murray REP No2 sets out principles that need to be considered in undertaking any development on land that the plan applies to. A response to the principles is offered below.
Access The proposed works will not have any impact on the
public’s ability to access this part of the waterway. The site already has existing infrastructure and these works will not cause any further impedance of access.
Public access to the waterway and the foreshore of the Murray River is not being altered in any way as a result of these works. This is due to the existing pump shed, suctions and pipelines being in place on site. Access for maintenance and operational requirements will remain unchanged following these works
The site is on the Victorian bank and therefore vehicle access is restricted to the Victorian part of the site.
Access may also be provided from the Murray River through positioning a barge on the river at the site.
Bank disturbance The works proposed are designed to shore up and
preserve as much of the existing riverbank profile as possible. The works have been designed to have only minimal impact the bank and every effort will made to ensure no further bank material is removed or disturbed. The rock beaching will be laid over the existing bank surface in order to maintain as much of the remaining bank profile as possible.
There is no extant vegetation anywhere within the works zone. No vegetation will be adversely impacted as a result of these works.
Flooding The site is subject to inundation by floodwater, but the
works will not be adversely impacted by floods of any magnitude.
Ref: 18-004 15 Development application statement of environmental effects – Olam Orchards
The proposed development of the site will not deprive the surrounding ecosystems of the benefits of periodic flooding.
There will no increased hazards or risks from flooding as a result of this proposed development. The proposed development will not have any material impact on flood events nor will it have impact on on risk from flooding.
There will be no redistributive effect on flooding as a result of the proposed works. This development will have no impact on flooding in the river.
The proposed works will not impact any other land in the vicinity. All adjoining land consists of the riverbank and is likewise subject to the same flood events.
There will no impact on the ability of emergency services to have flood free access
There will be no change to the risk of pollution during flooding as a result of this proposal.
There will be no measurable impact of this development on floodwater.
The design of this infrastructure ensures that it will not be at risk even in a 1:100-year flood event.
Land degradation The works will be undertaken to limit the chance of
increased degradation or erosion to the land. The site will be established and reinstated appropriately and consistent with the attached design. Minimal disturbance to the riverbank is the sole purpose of the proposed works.
The successful completion of the works will greatly reduce the potential for bank erosion, secure the site, and prevent any subsequent impact on water quality.
Landscape No vegetation will be removed as a result of these
works. Tree roots that have become exposed by the erosion of the bank will be covered and protected.
River related uses The development has an intrinsic relationship with the
river. The site is the only source of irrigation water and it cannot be located elsewhere.
Settlement The proposal does not constitute new or expanded
settlement.
Water quality There is the potential for minor impacts on water
quality through the construction phase. This is due to the interaction with fine benthic sediments and may lead to short term and low-level turbidity.
Wetlands The works are not located on wetlands and will not
impact upon any wetlands
Balranald LEP The site is located in Zone W1 Natural Waterways. The proposed works are consistent with the relevant objectives of this zone, including:
To protect the ecological and scenic values of natural waterways
The pump site is a part of existing infrastructure and the proposed works will have minimal additional impact on the ecologic and scenic values of the riparian environment. The works are designed to stop the erosion of the bank so that the future operational viability of the site can be assured.
The appearance of the site will largely be the same except for the addition of the rock beaching. The rock will be mixed bluestone aggregate and it will blend into the existing natural colours that are present at the site.
To prevent development that would have an adverse effect on the natural values of waterways in this zone
The proposed works will not cause additional impacts from development at the site. The works are connected with an existing site and the degree of development will not be altered by these works.
Ref: 18-004 16 Development application statement of environmental effects – Olam Orchards
To provide for sustainable fishing industries and recreational fishing
There will be no adverse impacts on fishing as a result of this proposal at this location.
Clause 6.7 relates to earthworks and seeks to ensure they do not have a detrimental impact upon the environment. The clause requires consent for earthworks and in response to the items that Council must consider the following is offered:
Drainage patterns of the environment will not be altered as a result of the works proposed.
The land is used by the horticultural development for water supply purposes and this will continue indefinitely. Therefore, future alternate use or development is not contemplated for the immediate surrounds.
No material will be removed from the riverbank. The works will preserve the existing bank profile as far as possible.
There will be no impact on the adjoining land as a result of the upgrade works proposed. All works are designed to prevent further erosion at the site.
In the event aboriginal cultural items are uncovered during construction, the relevant organisations will be notified. Based upon the significant disturbance previously undertaken and the limited impact of the proposed works interaction with cultural heritage objects is considered highly unlikely.
The possible impacts upon the Murray River have been considered above.
Consideration of riparian land and the riverbed and bank is provided for at Clause 6.2 and 6.6 of the LEP. The items requiring consideration are similar to those provided for in the Murray REP No2 however a response to the additional items is provided. Consideration of impacts to native flora and fauna is provided for in the relevant assessment. The works will be undertaken in as an environmentally sensitive manner as possible.
The works will not have any additional impact upon the free passage of fish.
Ref: 18-004 17 Development application statement of environmental effects – Olam Orchards
Conclusion
In light of the information presented in the foregoing the proposed development responds well to the opportunities and constraints of the site and is considered to be consistent with the relevant provisions.
The proposal is appropriate for the site for the following reasons:
The works constitute maintenance and management of an existing asset that is subject to Crown Lands Licence
The proposal provides for the rehabilitation of the bank to prevent further erosion.
There will be no impact on vegetation.
The structure responds to the site characteristics and opportunities and has considered the potential impacts upon the locality and that particularly of the Murray River.
The proposal is consistent with Balranald LEP.
The proposal is consistent with the Murray Regional Environmental Plan No 2 – Riverine land.
James Golsworthy Consulting
152 Madden Avenue Mildura VIC 3500 PO Box 1650 Mildura VIC 3502
telephone 03 5022 8411 email [email protected]
www.jgconsult.com.au
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APPENDIX B DEPARTMENT EMAIL RESPONSE
1
Michelle Townsend
From: Jarrod Smith <[email protected]>Sent: Wednesday, 20 February 2019 11:24 AMTo: James GolsworthyCc: Natalie Ryan; Vanessa WoodhamSubject: Olam Orchards Pump - Murray River Bank Stabilisation
To whom it may concern, The NSW Department of Industry, Lands and Water (the Department) regrets to inform you that Owner's Consent will not be granted for the current design of the recently submitted Development Application regarding the proposed works to stabilise the bank of the Murray River at the location of an Olam Orchards pump. The current design does not address environmental concerns nor does it adhere to Native Title requirements. It should be stated that bank erosion on the bends of the Murray River is a natural process, which can be accelerated from the periodic flooding and drying of the river. The stabilisation of 20 metres of riverbank on the outside of a bend would have a significant impact on this process, and create unintended detrimental impacts downstream. There is no mention of hydrological modelling in the SEE to show that there would be no detrimental impacts on the bank and bed. Furthermore, the geotextile fabric will change the scenic values of the area. There is no evidence presented in the SEE that the sheet piling six metres into the river will not create a groyne, which would likely then create erosion and deposition hazards in the river. In conjunction with the potential groyne, the rock beaching could result in the formation of an eddy, which will further contribute to erosion. Increased deposition of sediment from decreased flow velocities could also be an impact from the proposed development. A rehabilitation plan would also need to be formulated to detail how the licence holder plans to remove material associated with the proposed works should the licence no longer be required. The Department would not be able to validate a licence for any works outside of the current licence area due to Native Title considerations. Any works proposed to stabilise the bank would need to occur completely within the current licence area. If you have any questions regarding this matter, please contact myself on the details shown below. Kind regards, Jarrod Smith | Acting Property Management Project Officer - Far West West Region | Crown Regional Services NSW Department of Industry - Lands & Water 45 Wingewarra Street, Dubbo NSW 2830 - PO Box 2185, Dangar NSW 2309 T: 02 6883 5448 E: [email protected] Generic Inquiries T: 1300 886 235 | W: www.industry.nsw.gov.au/lands
Please Note: our office opening hours are 9.00am to 12.00pm Monday to Friday and outside of these hours by appointment only.
This message is intended for the addressee named and may contain confidential information. If you are not the intended recipient, please delete it and notify the sender. Views expressed in this message are those of the individual sender, and are not necessarily the views of their organisation.
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APPENDIX C SURVEY
19012FEATUR
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Mildura S
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REF : 19012FEA
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NOTE
THE POSITIONS OF UNDERGROUND SERVICES HAVE NOT BEEN LOCATED.PRIOR TO EXCAVATION OR CONSTRUCTION ON THE SITE THE RELEVANTAUTHORITY SHOULD BE CONTACTED FOR LOCATION OF UNDERGROUNDSERVICES AND DETAILED LOCATIONS OF ALL SERVICES.
PIPE TRAY DIMENSIONS: 0.2m
X0.4m
SUPPORT BEAM DIM
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PIAM
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15
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APPENDIX D RECOMMENDED DESIGN ARRANGEMENT
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49
57
ELECTRICAL
COMPOUND
MURRAY RIVER
FLOW DIRECTION
C02
A02
FINISHED ROCK BEACHING SLOPETO BE NO STEEPER THAN 1.5(H):1(V)
RETAINING WALL TO EXTENDAPPROXIMATELY 1m BEYONDCOLUMN ON BOTH SIDES
TBM SPIKE 3
m
2520151050
B02
PUMP SHED
ROCK BEACHING IS TO TRANSITIONTO MATCH THE EXISTING SURFACE
ROCK BEACHING IS TO TRANSITIONTO MATCH THE EXISTING SURFACE
NOTES
1. THE SITE SETOUT IS TO BE INSPECTED BY A SUITABLY QUALIFIED ENGINEER PRIOR TOWORKS COMMENCING.
2. THE FINISHED ROCK BEACHING IS TO EXTEND TO TOP OF BANK.3. FINISHED ROCK BEACHING SLOPE SHALL BE NO STEEPER THAN 1.5(H):1(V).4. THE ROCK LEDGE SHALL BE CONSTRUCTED TO PROVIDE A FIRM FOUNDATION FOR THE
ROCK BEACHING.5. ROCK USED FOR THE WORKS SHALL BE HARD, DURABLE AND ANGULAR IN SHAPE, FREE
FROM CRACKS, OVERBURDEN, SHALE AND ORGANIC MATTER.6. THE D50 OF ALL ROCK IS TO BE 400mm (REFER TO ROCK SPECIFICATION TABLE).7. D50 = MEDIAN PARTICLE SIZE. 50% OF THE ROCK MASS SHALL CONSIST OF ROCK WITH AN
EQUIVALENT SPHERICAL DIAMETER EQUAL TO OR LARGER THAN THIS DIMENSION. REFER TOROCK SPECIFICATION TABLE.
8. ROCK BEACHING IS TO HAVE A MINIMUM THICKNESS OF 2 x D50.9. ROCK IS TO BE PLACED USING APPROPRIATE MACHINERY NOT TIPPED OR DUMPED DOWN
THE BANK. WHERE IT IS NOT POSSIBLE TO PLACE ROCK WITH MACHINERY (I.E. UNDER THEPIPES) ROCK IS TO BE PLACED USING A CHUTE TO CONTROL THE PLACEMENT OF ROCK.
10. ALL DISTURBED AREAS ARE TO BE RETURNED TO EXISTING CONDITION AND LEVELS.11. DAMAGE TO NATIVE VEGETATION IS TO BE AVOIDED.
MATERIAL QUANTITY ESTIMATES*
MATERIAL UNITS QUANTITY
ROCK m³ 330
ROCK t 530
ROCK SPECIFICATION
EQUIVALENT SIEVE SIZE* PERCENTAGE SMALLER(BY WEIGHT)
2 TIMES D50 (800mm) 90%
D50 (400mm) 50%0.3 D50 (120mm) 10%
* ALL ESTIMATES ARE APPROXIMATE ONLY.ADDITIONAL ROCK MAY BE REQUIRED TO FORM ASTABLE ROCK LEDGE
TBM SPIKE 1
TBM SPIKE 2
ROCK BEACHING TOEXTEND TO TOP OF BANK
WORKS AREA = 250m²
SOP 1
SOP 2
SOP 3
SOP 4
VERSIONS CLIENT: Water Technology Pty LtdCCONSULTANT:
ABN: 60 093 377 283 Melbourne T +61 3 8526 0800
Water Technology Pty Ltd
APPROVEDCHECKEDDESIGNDRAWN TJA/SFS
JCMJCM
PLANSCALE 1:200
@ A3
NV01
OLAM ORCHARD ROCK ARMOURING DESIGN
JOB NO. 20010153
Drawing No.
FOR COMMENT 11/12/2019
OLAM ORCHARDS AUSTRALIA
SFS
SHEET 1 OF 3
LEGEND
MAIN PIPEEDGE OF CONCRETEEDGE OF WATERPIPE TRAYSUPPORT BEAMSGUARDRAILFENCEPILERETAINING WALLROCK ARMOURING
| | | | | | | | |
/ / / / /
20010153 D01V02
V02 DESIGN 19/12/2019 TJA
VER. DESCRIPTION DATE INIT.
057
.24
1057
.6
21.7
30.0
47.74
CHAINAGES
DESIGN SURFACE
EXISTING SURFACE
DATUM R.L.44.000
EXISTING PIPE
52.58
14.28
57.6
FINISHED ROCK BEACHING SLOPE TO BENO STEEPER THAN 1.5(H):1(V)
PUMP SHED
57.6
RETAINING WALL.SEE SHEET 3
50.86
SECTION BSECTION A
FINISHED ROCK BEACHING SLOPE TO BENO STEEPER THAN 1.5(H):1(V)
0.00
57.39
5.20
57.40
20.36
47.16
24.92
46.92
CHAINAGES
DESIGN SURFACE
EXISTING SURFACE
DATUM R.L.44.000 0
57.39
5.20
57.40
20.08
47.30
23.02
46.86
CHAINAGES
DESIGN SURFACE
EXISTING SURFACE
DATUM R.L.44.000
SECTION C
23.96
46.87
57.40
46.87
47.98
57.40
47.10
46.86
25.29
47.94
ROCK BEACHING TO EXTENDTO TOP OF BANK
ALLOW FOR GENEROUSPROVISIONS OF ROCK TOFORM A ROCK LEDGE
MIN
IMUM
ROC
KTH
ICKN
ESS
2 X
D50
FINISHED ROCK BEACHING SLOPE TO BENO STEEPER THAN 1.5(H):1(V)
ROCK BEACHING TO EXTENDTO TOP OF BANK
ALLOW FOR GENEROUSPROVISIONS OF ROCK TOFORM A ROCK LEDGE
EXISITING SURFACE EXISITING SURFACE
EXISITING SURFACE
EXISTING BEAM
TOE ARRANGEMENT SUBJECT TO AVAILABILITY OF BOULDERS
BOULDER SIZEM
IN. 1m
NOT TO SCALE
INDICATIVE EXISITNGBANK PROFILEM
INIM
UM R
OCK
THIC
KNES
S 2
X D5
0
VERSIONS
VER. DESCRIPTION DATECLIENT: Water Technology Pty LtdCCONSULTANT:
ABN: 60 093 377 283 Melbourne T +61 3 8526 0800
Water Technology Pty LtdINIT.V01
OLAM ORCHARD ROCK ARMOURING DESIGN
JOB NO. 20010153
Drawing No.
SCALE: 1:300
20010153 D01V02
FOR COMMENT 11/12/2019OLAM ORCHARDS AUSTRALIA
SFS
SHEET 2 OF 3
APPROVEDCHECKEDDESIGNDRAWN TJA/SFS
JCMJCM
@ A3
V01 DESIGN 19/12/2019 TJA
ROCK BEACHING SECTIONS
EXISTING COLUMN
M20 BOLT X 2
150X10mm PLATE 350mm LONG
150X10mm PLATE 150mm LONG6mm FILLET WELD
6mm FILLET WELD
6mm FILLET WELD
BEAM IS TOEXTEND
APPROXIMATELY1m BEYOND
COLUMN
PLAN VIEWSCALE 1:10
M20 BOLT
6mm FILLET WELD
150 X 10mm PLATE X 150mm LONG
310UB40
165m
m
UNDERSIDE OFLOWEST BEAM IS TOSIT AT BANK LEVEL
EXISITNG BEAMTO BE RETAINED
INDICATIVE BANKPROFILE
ELVEVATIONSCALE 1:15
310UB40
150X10mm PLATE 350mm LONG
VERSIONS
VER. DESCRIPTION DATECLIENT: Water Technology Pty LtdCCONSULTANT:
ABN: 60 093 377 283 Melbourne T +61 3 8526 0800
Water Technology Pty LtdINIT.V01
OLAM ORCHARD ROCK ARMOURING DESIGN
JOB NO. 20010153
Drawing No.
SCALE: ON DRAWING
20010153 D01V02
FOR COMMENT 11/12/2019OLAM ORCHARDS AUSTRALIA
SFS
SHEET 3 OF 3
APPROVEDCHECKEDDESIGNDRAWN TJA/SFS
JCMJCM
@ A3
RETAINING WALL V02 DESIGN 19/12/2019 TJA
APPR
OXIM
ATEL
Y20
0mm
Olam Orchards Australia | 04 February 2020 Olam Orchards Pump Site
19010119-0
1_R
01V
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Pum
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Melbourne 15 Business Park Drive Notting Hill VIC 3168 Telephone (03) 8526 0800 Fax (03) 9558 9365
Brisbane Level 3, 43 Peel Street South Brisbane QLD 4101 Telephone (07) 3105 1460 Fax (07) 3846 5144
Adelaide 1/198 Greenhill Road Eastwood SA 5063 Telephone (08) 8378 8000 Fax (08) 8357 8988
Perth Ground Floor 430 Roberts Road Subiaco WA 6008 Telephone 08 6555 0105
Geelong PO Box 436 Geelong VIC 3220 Telephone 0458 015 664
Gippsland 154 Macleod Street Bairnsdale VIC 3875 Telephone (03) 5152 5833
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Wimmera PO Box 584 Stawell VIC 3380 Telephone 0438 510 240
www.watertech.com.au