Development Application for the Tod River Dam Safety Upgrade - Phased Standards Based Upgrade with Lowered Full Supply Level

December 2015

Prepared by:

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Version History

Version Date Author Comments 0.01 11/11/15 Charmaine Goodes First draft.for review 1.0 17/12/15 CG/TH Incorporating internal reviewer comments – for submission

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Contents 1 Introduction ...... 5

1.1 Development Application Process ...... 5

1.2 Consultation ...... 5

2 The Subject Property ...... 6

3 Statement of Heritage Significance ...... 9

4 History of Tod River Dam ...... 10

5 Nature of the Proposal ...... 11

5.1 Scope of the Preferred Safety Upgrade Option ...... 12

5.1.1 Permanent lowering of the FSL to EL 105.3 m AHD to provide additional flood capacity .... 12

5.1.2 Installing a new intake on the outlet works to enable supply to a potential customer ...... 13

5.1.3 Modification of the outlet works to act as a Primary Spillway ...... 13

5.1.4 Outlet tunnel filter blanket to reduce the risk of a piping failure along the outlet ...... 16

5.1.5 Energy dissipater for the new primary spillway at the toe of the dam ...... 16

5.1.6 Decommissioning Pillaworta weir and modifications to the Tod River and Pillaworta Intake Channels to reduce inflows during a flood ...... 17

5.1.7 Demolish the rock groyne and concrete weir on the upstream side of the spillway access road to increase flood capacity ...... 22

5.1.8 Civil works and Rip-Rap spill area downstream of the existing spillway leading into the creek bed ...... 27

5.1.9 Modify existing causeways downstream of the Dam at the following three locations: Reservoir Drive, Macdonald Rd and Gawler Ponds Rd ...... 27

5.1.10 Backwater & Waterway Restoration minor earth works and revegetation ...... 31

5.2 Proposed Project Schedule...... 32

6 Environmental Considerations ...... 33

6.1 Environmental Approvals ...... 34

6.2 Native Vegetation ...... 36

6.3 Sediment and Soil Erosion Management ...... 39

6.4 Preliminary Environmental Management Plan ...... 39

7 Planning Assessment ...... 39

7.1 District Council of Lower Eyre Peninsula Development Plan ...... 40

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7.1.1 Conservation ...... 40

7.1.2 Water Protection Zone ...... 40

7.2 District Council of Tumby Bay Development Plan ...... 42

7.2.1 Conservation ...... 42

7.2.2 Tod River Water Protection Zone ...... 42

8 Conclusion ...... 42

9 References ...... 43

Appendix A - Photographic Record ...... 44

Appendix B Concept Design Drawing ...... 51

Appendix C Preliminary Project Environment Management Plan ...... 59

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Tod Reservoir is located on the Toolillie Creek, a tributary of the Tod River, 27 km north of Port Lincoln, South Australia. The dam was completed in 1922 to store and supply drinking water to the Eyre Peninsula. Since 2002 the reservoir has been offline due to salinity levels and as such is not currently used as a water supply on Eyre Peninsula. The reservoir does however remain a contingency supply for the Eyre Peninsula. .There have been a number of Safety and Risk assessments conducted since 2001 for the Tod River Reservoir which have identified that the dam is not compliant with current Australian National Committee On Large Dams (ANCOLD) Guidelines, as it currently has a number of intolerable risks.

SA Water has an obligation to manage dam safety risks and have therefore made a commitment to comply with ANCOLD Guidelines. To meet this commitment it is necessary to reduce the dams’ probability of failure through increasing the flood capacity, reducing the likelihood of a major leak developing and upgrading the intake to the outlet. If this is not undertaken there is a risk that the dam may fail during a flooding or seismic event, due to overtopping of the dam or internal embankment erosion or other latent defect. If the dam fails, this could lead to a potential loss of life, financial losses and much larger economic losses to society with the loss of water supplies to the East Coast and West Coast through the loss of critical downstream infrastructure including pipelines and the Tod pump station.

Throughout this document Tod Reservoir is variably referred to as the Tod River Reservoir and Tod River Dam. The State heritage listing refers to it as ‘Tod Reservoir’, however the name used for the purposes of the project and SA Water’s asset management program is Tod River Dam. All references contained herein relate to the same infrastructure.

1.1 Development Application Process

SA Water is seeking Development Authorisation for the Tod River Dam Safety Upgrade under Section 49 (Crown Development) of the Development Act, 1993, as the Tod Reservoir is State heritage listed on the South Australian Heritage Register.

The relevant approving authority is the Development Assessment Commission. This report and supporting information forms the Development Application.

It should be noted, that as part of the upgrade project other ancillary works are required including modifications to three causeways downstream of the reservoir. These have been included in this application for completeness only and are not part of the heritage listing for the site. 1.2 Consultation

Implementation of the stakeholder engagement strategy will maximise opportunities for stakeholders, including the community, to be well informed on the project and, where possible, to contribute to its successful completion.

In planning for this project and as part of the development of this application, SA Water has consulted with Senior Conservation Architect, Department of Environment, Water and Natural Resources. Meetings to discuss the proposed upgrade works have also been undertaken with officers from Natural Resources Eyre Peninsula, the Environment Protection Authority, Lower Eyre Peninsula District Council, Tumby Bay District Council and adjacent landowners.

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The Tod River Dam is situated across Toolillie Creek near its junction with the Tod River and is located off White Flat – Koppio Road, White Flat and the reservoir reserve is within both District Council of Lower Eyre Peninsula and District Council of Tumby Bay. Knotts Hill Reservoir and the supplementrary flow intake channels to the reservoir are within District Council of Tumby Bay.

The current Certificate of Title references for the Reservoir, Knotts Hill and intake channels include:

Reservoir CT 5841/603 CT 5773/969 CR 5757/454

Knotts Hill Reservoir CR 5757/936

Channels CR 5757/932 CR 5757/934 CT 5773/969 CT 5408/465 CT 5094/898

The Reservoir is located within the District Council of Lower Eyre Peninsula’s Water Protection Zone and District Council of Tumby Bay’s Tod River Catchment Protection Zone.

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Figure 1. Overview map showing location of Tod Reservoir and weirs

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Figure 2. Overview map showing location of reservoir and intake channel

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Figure 3. Tod reservoir reserve, with land parcel boundaries

3 Statement of Heritage Significance Tod Reservoir is listed on the South Australian Heritage Register (number 14213). This formal recognition acknowledges the historical significance of the reservoir and provides protection and conservation under the Heritage Act, 1993.

The pre-1993 heritage listing states the significance as ‘It is a major source of water supply for the Eyre Peninsula’. Also the listing indicates ’The Tod River Reservoir Scheme was the result of a culmination of inadequate water supplies that preceded it. Built to encourage settlers to the area, especially where the railway system had opened up new lands for agriculture.’

A heritage survey conducted by Swanbury Penglase in 2010 acknowledges that the current South Australian Heritage Register listing does not include all components of the water supply system, as the reservoir is reliant on diversion from upstream watercourses and these channels (amongst other components) are not listed.

The survey identifies a number of Contributory Heritage Components including:

• Head works at Tod River including concrete weir and gates constructed at same time as the reservoir (CT 5094/898)

• Concrete weir at Pillaworta Creek including concrete weir and gates constructed at same time as Reservoir (CT 5094/898)

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• Concrete lined open diversion channels and associated tunnels connecting weirs with east side of Reservoir constructed at same time as Reservoir (CT 5094/898, CT 5408/465, CR 5757/934, CR 5756/500, CR 5757/933, CT 5094/898, CR 5752/932, CT 5773/969, CR 5773/969)

• Spillway on east side of Reservoir constructed at same time as Reservoir (CT 5841/599)

• Valve house on northeast side of wall with operating rods extending down below water level and cast iron gauge boards

• Keepers residence located south side of Reservoir wall

• Memorial to death of workmen on west side of Reservoir wall (CR 5757/454)

• Knotts Hill Reservoir (CR 5757/936)

4 History of Tod River Dam

The SA Engineering and Water Supply (EWS) Department prepared a historical account of the construction and operation of the Tod River Dam in 1985. The following section provides a summary of key aspects of this reference document entitled: “Historical Account of Construction and Operation: Tod River Dam (EWS 1985).

In January 1916 a Royal Commission was appointed by the Governer ‘to inquire into and report upon the question of the construction’ of a reservoir on the Tod River. After two tours on the peninsula, the Commission later reported that ‘no other extensive portion of South Australia is so sorely and supremely in need of a permanent water supply as Eyre’s Peninsula’.

The construction of railways on Eyre’s Peninsula had encouraged occupation of large tracts of country but absence of water was a great drawback to settlement. Most farmers were forced to rely on carted (usually by rail) water at a cost not less than 1 pound per 1,000 gallons. At the same time people at Port Lincoln depended mainly on rain water, with only 3 wells providing good drinking water.

In August, 1916 the ‘Tod River Water System’ was authorised by parliament. The then Hydraulic Engineer, Mr CA Bayer, stated before the Royal Commission, that he was not satisfied that the reservoir would be filled each year, but the scheme would meet the requirements of Eyre Peninsula for stock and domestic purposes.

The overall scheme adopted when construction began in 1918, was for the construction of 11 kilometres of concrete lined channel to lead water from controlling weirs to be constructed on the Tod River and Pillaworta Creek to a reservoir in Toolillie Gully. The scheme as constructed allows for water to be supplied via 2 inlet channels. The channel from Pillaworta Creek Weir intercepts the main channel from Tod River Weir to the reservoir, via a syphon which passes under the Tod River. Intercepting the main channel from Tod River Weir are a total of 11 creeks which provide water to the reservoir.

Original proposals were for water to be pumped to a service reservoir at Bald Hill, however Knotts Hill was adopted for the site of the service reservoir.

Construction started on 15th August 1918 by Concrete Steel Contracting Co. Ltd. Work progressed slowly during the initial stages of the embankment construction due to the shortage of labour. EJ Bradley was appointed Resident Engineer from the start of construction and reported that on average only 31 men were employed, the men ‘coming and going’ as they seemed to be dissatisfied with the local conditions. On the 9th November 1918, 3 men died in a cave in during excavation for the outlet tunnel. Another 4 men were to die in two separate blasting accidents during 1921. A memorial plaque, erected in 1982 at the picnic area adjacent to the embankment, honours the 7 men who died during construction of the reservoir.

All work on the embankment, bywash and intake channels was completed by the end of September 1922. By mid-1923 the pumping station was complete and the contract laying of 112 kilometres of pipe including the rising main to Knotts Hill reservoir, was the only contract not complete.

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Port Lincoln received its first reticulated water supply in 1927. The town was initially fed by seepage water, of up to 9ML per day, leaking through the earthen embankment. The Tod River Water Scheme was officially opened with a ceremony at Thevenard in June 1928.

During the mid-1930s several schemes were mooted to increase the total catchment area of Tod Reservoir. However, investigations were already underway into harnessing of the Uley-Wanilla Basin underground water scheme. Because of the lower salinity of water from the Uley-Wanilla Basin the Port Lincoln town system was switched to the new source as soon as it became available in 1949. Completed in 1954 the Uley-Wanilla Basin Scheme was supplemented in 1960 with Lincoln Basin, which became the sole source of supply to Port Lincoln until 1974 when the Uley South basin was developed. Water supplies to broader Eyre Peninsula were further supplemented with the completion of the Iron-Knob to Kimba pipeline in 2007, the pipeline augments supplies from local groundwater supplies with water from the River Murray.

The dam overflowed for the first time in 1932 and only once again since then. Today, the reservoir remains a contingency supply for the Eyre Peninsula but has not been used as a drinking water source since 2002, when it was taken offline due to salinity levels exceeding potable salinity levels in the Australian Drinking Water Guidelines. The salinity is a result of salinisation issues throughout the broader catchment.

5 Nature of the Proposal

In 1998 SA Water made a commitment to meet the requirements of the ANCOLD Guidelines for managing the safety of their dams. From the various studies conducted by GHD, as commissioned by SA Water from 2001 to 2014, a number of Dam Safety factors were identified driving the need for investment. The studies focused on detailed revised hydrology and dambreak studies, consequence assessment, updated stability analyses and piping risk assessment. These reports have identified that the dam is not compliant with current ANCOLD Guidelines with respect to flood capacity and resistance to piping which could lead to a dam failure and corresponding loss of life and direct and indirect economic loss to society. More specifically non-compliance with the guidelines is as a result of the following:

 A current spillway capacity is equivalent to the 1:400 annual exceedance probability (AEP) flood and it needs to be able to safely pass the Probable Maximum Precipitation Design Flood (AEP of 1:10,000,000).

 There is risk of a major leak developing through the embankment (particularly upper part), along the outlet conduit, abutments and foundations that increases the risk of dam failure. The right abutment cross section does not meet current acceptable design criteria for an existing structure under normal operating conditions due to the high measured pore pressures.

 A seismic event could crack the embankment resulting in the development of a major leak that could lead to dam failure.

 The condition of the sloping outlet pipe on the left flank of the reservoir basin has deteriorated to the point where it should be replaced. Failure of the outlet metal components due to corrosion would prevent the dam from being drained in an emergency which would increase the likelihood of failure.

 The high risk to potential loss of life and direct financial loss impacts to SA Water (excluding insurance considerations) for a dam failure in accordance with the ANCOLD Guidelines have been assessed during the dam failure risk assessment. The potential failure of the dam due to floods or from a major leak through the embankment and the societal risks places the dam well above the ANCOLD Limit of Tolerability.

A number of subsequent studies and investigations have been completed to determine the preferred option to upgrade the dam to meet ANCOLD guidelines, considering whole of life cost, environmental and social factors. Following this rigorous process, the preferred option selected to progress to detailed design is the Phased Dam Safety Standards-based Upgrade for Tod River Dam with Lowered Full Supply Level.

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5.1 Scope of the Preferred Safety Upgrade Option

This section covers the various elements included in the preferred safety upgrade option; Phased Standards- based Upgrade with Lowered Full Supply Level. Detailed design is currently being progressed by SA Water and design consultants GHD, therefore the details within the following section are based on the conceptual design completed to date. 5.1.1 Permanent lowering of the FSL to EL 105.3 m AHD to provide additional flood capacity

SA Water is proposing to lower the original Full Supply Level (FSL) from 118.73m Australian Height Datum (AHD) to 105.3m AHD. See Figure 4. This will reduce the frequency for flood water levels above 105.30m AHD, lowering the annual probability of failure of the dam for failure modes initiated by flood loading. The new future reservoir capacity will be 918 megalitres (ML) compared with the original capacity of 11 300ML. The reservoir has not reached full capacity for many years i.e.114m AHD in 2005, 109m AHD in 2013 and is currently at approximately 105.0m AHD. Since 2010, SA Water has been annually discharging water from the reservoir during winter under a Best Practice Operating Procedure formally approved by the Eyre Peninsula Natural Resource Management Board and Environment Protection Authority (EPA). This has been undertaken as part of management of water quality within the reservoir. The procedure largely involves better quality water intakes (lower salinity), shandied with stored water to reduce the salinity in the discharge water quality.

The new lowered FSL will be achieved by modifying the current outlet works to act as an uncontrolled primary spillway. Refer to Section 5.1.3 below for details.

As part of the project, backwater restoration including minor earthworks to form a channel and revegetation will be undertaken. Refer to Section 5.1.10 for further details.

Figure 4. Original Full Supply Level (blue) and proposed lowered Full Supply Level (orange)

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5.1.2 Installing a new intake on the outlet works to enable supply to a potential customer

A new intake will be installed on the outlet works to provide operational flexibility and enable supply to a potential future customer(s). At this stage the new intake structure will include a riser pipe and guard valve, allowing for future connection of a supply pipeline. Refer to Figure 7 for schematic details.

If an organisation were interested in sourcing water from the Tod Reservoir, a business proposal would need to be considered by SA Water. Any organisation wishing to use water from SA Water’s offline reservoirs (including Tod Reservoir) is required to submit a formal request which would then be thoroughly assessed by SA Water taking into consideration a number of factors, including any potential environmental impacts. To date, no such formal proposal has been received for water use from Tod Reservoir. 5.1.3 Modification of the outlet works to act as a Primary Spillway

Modification of the existing outlet works to a primary (bellmouth) spillway with a crest level of EL 105.30m AHD is proposed. This will consist of alteration of the existing DN600 outlet pipework at the upstream end of the tunnel. The overflow modifications will safely discharge flows (uncontrolled) from the reservoir through the existing pipework, including the existing scour point downstream of the embankment. This will provide additional flood capacity in the reservoir.

The modification works will involve:

 removal of the existing concrete structures and silt upstream of the outlet tunnel and removal of the inclined intake pipework up the left flank

 modification to the existing outlet pipe to include a new 600mm stainless steel, vertical overflow stack with a flanged bellmouth set at the new reduced full supply level of EL 105.30m AHD.

 new foundation and support frame for the overflow pipe.

 installation of a hand wheel actuated DN600 butterfly guard valve at the exiting blank flange on the downstream end of the scour pipe (upstream end of the outlet tunnel).

 provision of an impact type spilling basin at the downstream end of the overflow pipe arrangement.

Refer to Figure 5 for schematic details and Refer to Figure 7 for the location of the new bellmouth spillway.

The new uncontrolled primary spillway will mimic a more natural flow regime in the downstream Tod River, from Toolillie Creek pre reservoir development. Currently water is only discharged from the reservoir during winter in accordance with a Best Practice Operating Procedure which sets out conditions around the timing and nature of flow. The new uncontrolled primary spillway, will in the longer-term, have ecological benefits for the downstream Tod River environment, through receiving flows at times when they would otherwise have been captured and retained within the reservoir.

As part of the above modifications the cast iron gauge boards will not be removed, only the inclined intake pipework in the bank up to the control rods. Also the control rods connecting to the valve house will remain unless they become a hazard due to their poor condition (very rusty). EWS (1985) noted that some decommissioning works were completed previously in this location with aspects of works being undertaken until late 1984. The report notes that “when divers managed to open the valve lid of the central of the three under water flap valves, only the lowest valve was open. The uppermost valve (top valve) could not be located in the bank and remains covered by silt and rock. Control rods to the valves were cut off at the valve house some years ago.”

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Figure 5. Future supply and overflow schematic

Figure 6. Location of new primary (bellmouth) spillway, delineated by buoys in water (location of existing outlet works). Note: cast iron gauge boards will remain.

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Location of new primary (bellmouth) spillway and outlet works

DAM EMBANKMENT

Location of outlet tunnel works - indicates extent of batter and rock to be remove, stockpiled and reinstated

Energy dissipater

Figure 7. Concept plan showing location of new primary (bellmouth) spillway, outlet tunnel works and energy dissipater

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5.1.4 Outlet tunnel filter blanket to reduce the risk of a piping failure along the outlet

To address the risk of piping along the outlet tunnel in the absence of a chimney filter, a sand filter diaphragm and filter collar will be retrofitted to the outlet tunnel. The outlet filter diaphragm will consist of a chimney filter over the full height of the upstream face to the excavation around the outlet tunnel.

A 1H:1V batter is proposed for the upstream face and sides of the excavation into the embankment, as a short term construction batter. Existing embankment material will be stockpiled nearby for reuse in the downstream shoulder over the new filter, without the need for new material to be won. The existing rock armouring will also be stripped and stockpiled for reuse on the dam embankment.

Some previous repair work has been undertaken in the outlet tunnel as noted in EWS (1985), that ‘recent remedial work in the outlet tunnel involved the replacement of some badly corroded nuts and bolts at the upstream end of the pipework’. Also the pipework and valves were wrapped in Denso paste and heavy duty plastic to provide some protection against the highly corrosive damp atmosphere in the tunnel in the mid 1980’s.

Refer to Figure 7 for location of outlet works and Appendix B for concept design.

Figure 8. Downstream exit of existing outlet tunnel 5.1.5 Energy dissipater for the new primary spillway at the toe of the dam

An energy dissipater will be installed at the toe of the dam earth embankment. The energy dissipater is designed to dissipate the head of water being discharged from the new primary (bellmouth) spillway to ensure

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the area downstream of the outlet tunnel is not eroded or scoured. Refer to Figure 7 for location of the energy dissipater. Refer to Appendix B for concept design plan. 5.1.6 Decommissioning Pillaworta weir and modifications to the Tod River and Pillaworta Intake Channels to reduce inflows during a flood

The reservoir is directly fed from the Toolillie Creek which has a catchment area of 39 km2. The reservoir is also supplied by an intake channel, which has a total capacity of about 30 m3/s. The channel is fed from diversion weirs on the Tod River and Pillaworta Creek, a tributary of the Tod River and eleven smaller tributaries intercepted by the channel.

The proposed upgrade includes functionally decommissioning (not removal) of the Pillaworta Creek diversion weir and modifications to the intake channel to allow a flow of up to 1.5m3/s to be diverted into the reservoir as required for water quality management purposes, while limiting the potential flow into the reservoir under extreme flood conditions to the same amount. The Tod River diversion weir will not be decommissioned, as the weir diversion gates will remain in service to allow flow diversion into the Intake Channel.

The decommissioning concept for the Pillaworta Creek weir aims to retain the weir structure for its heritage value whilst taking it offline from the diversion channel by means of removing operational componentry, rather than full or partial demolition of the weir structure. The weir decommissioning will include removal of the diversion gate, scour valve and include a concrete wall to the Intake Channel just downstream of the weir.

The modifications to the Tod Intake Channel will include two channel breaches (No. 1 and No. 4) at major subcatchment inflows on creeks along the intake channel downstream of the Tod River diversion weir. A channel plug will also be installed downstream of each breach. Two other breach locations were investigated as part of early project assessments but are not required and will not be progressed. Refer to 11 and 12 for photos of each Breach location and Figure 14 for the channel breach locations .

The Intake Channel breaches will be in line with existing gully inflows to reinstate their previous drainage path. The channel embankment fill will be excavated for reuse in reshaping and addressing the deeply eroded area below the spillway. The breaches will incorporate a low overflow sill, approximately 400mm high across the breach to allow passing of the 1.5m3/s flow through the intake channel before spilling at the breach locations. Intake channel plugs will be installed downstream of each breach location. The ‘plugs’ will comprise a concrete wall across the full channel cross section. At Breach No. 4 it is proposed to install gates at the base of the concrete wall to limit flood inflows. This way the gates could be permanently in place to prevent any discharge into the Tod Reservoir . When required, SA Water will be able to open the gates and allow diverted flows to pass through the channel into the storage from the Tod River catchment for water quality management purposes.

During construction some dewatering and/or temporary creek diversions may be required at Breach No. 1 as standing water was observed. For Breach No.4 it appears to be ephemeral and work is proposed when there are no flows. Environmental management controls will be in during construction for water management and erosion or scouring.

Refer to Appendix B for concept design of proposed channel breaches.

Scour and erosion protection at the channel breaches will include rock armouring and localised revegetation with selected local native species.

Works are also proposed to at the location of the Syphon where the Tod River and Pillaworta Creek converge (refer to Figure 2 for location and Figure 13 for photo). At this location a portion of the concrete channel wall and foundation is in very poor condition and has collapsed into the channel causing risks to safety at this point. It is proposed that the slumped concrete be removed and replaced with rock armouring to protect the channel from scouring and erosion. No works are proposed to be undertaken on the Syphon valve itself which will remain in situ and, as per current arrangements, permanently open discharge to the Tod River.

SA Water has been consulting with officers from Natural Resources Eyre Peninsula regarding the proposed works as a Water Affecting Activity Permit will be required under the Natural Resource Management Act, 2004 for this work.

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Figure 9. Pillaworta Creek diversion weir

Figure 10. Shows diversion gate at Pillaworta weir which is to be removed.

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Figure 11 – Breach location 1 - Earth embankment to be removed

Figure 12 Breach Location 4 – Earth embankment to be removed

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Figure 13 Syphon location where Tod River and Pillaworta creek converge–section of collapsed concrete to be removed - Syphon value located to right hand side of photo (under water) to remain in place

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Breach No. 1

Breach No. 4

Figure 14. Location Plan showing two breach locations

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5.1.7 Demolish the rock groyne and concrete weir on the upstream side of the spillway access road to increase flood capacity

SA Water is proposing to demolish and remove the rock groyne and concrete weir on the upstream side of the existing spillway. Refer Figure 15 to 19. Also the concrete retaining wall downstream of the access road will be removed and the access road across the spillway lowered by approximately 300mm. This will provide additional flood discharge capacity for the reservoir. EWS (1985) indicates that the spillway at Tod Reservoir is of the standard bywash type, with an excavated unlined channel. Work was completed on the bywash in April 1922. In January 1934 a stepped concrete wall (weir) 0.61m high and 54.1m long (top EL 118.73m) was constructed across the upstream end of the bywash to increase storage capacity of the reservoir. Two sets of wooden stoplogs 3 metres long are provided in this wall allowing the water level to be dropped by 0.61 metres to the original Fully Supply Level of the reservoir. EWS (1985) also indicates a gravel access road crosses the spillway channel just downstream of the stepped weir. The original wooden stop logs have been replaced though it is not clear when this occurred. A concrete retaining wall (top EL 118.427m) crosses the spillway just downstream of the gravel access road. The EWS (1985) report it notes the above work undertaken in 1934 to increase the crest of the spillway and capacity of the reservoir by a further 818ML comprises the only significant structural change made to the reservoir since construction. Based on this information, the spillway concrete weir and retaining wall was not part of the original dam design construction. EWS (1985) describes a rock groyne (top EL 119.0 approx.) has been constructed on the upstream side of the concrete spillway and the groyne was designed to protect the spillway from the effects of wave action. A date for construction of the rock groyne is not provided in the report. Upon review of the original design and construction contract (Drawing 85 DR162) it shows no indication of the rock groyne, nor the concrete weir and retaining wall. See Figure 20. The rock groyne is described in EWS (1985) in association with the concrete weir and retaining wall and SA Water’s Principal Dams Engineer expects that when the reservoir first overflowed in 1932 (it has only overflowed once again since then) it was found that wave action was causing erosion or sloshing along the track across the mouth of the spillway. Based on this review it can be concluded that the rock groyne was not part of the original design and was added later, possibly in 1934, as part of the concrete weir and retaining wall works, or even later than this.

Figure 15. Location of Existing Spillway Channel (red)

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Figure 16. Exisitng Spillway - Location of rock groyne, concrete weir, concrete retaining wall and roadway

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Figure 17. Plan showing existing Spillway (bywash) with location of rock groyne, concrete weir, roadway and retaining wall.

Figure 18. Looking north showing rock groyne and concrete weir on upstream side of existing spillway

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Two stop log locations along concrete weir

Figure 19. Existing spillway - Looking south, showing concrete weir and location of both stoplog structures

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Figure 20. Original construction drawing, showing absence of rock groyne, concrete weir and retaining wall. Note: Marked up to show location yellow= rock groyne, grey=concrete weir, red = concrete retaining wall

Version 0.01 dd/mm/yy Draft Document ID: TBD Page 26 of 77 For Official Use Only Uncontrolled when printed or downloaded

5.1.8 Civil works and Rip-Rap spill area downstream of the existing spillway leading into the creek bed

As part of the upgrade works SA Water is proposing to repair the eroded and scoured area below the existing spillway. This will be undertaken by backfilling the scoured area with rock and reusing suitable spoil material from the channel breach works. Rock will be sourced from local quarries.

Figure 21. Shows eroded and scoured area downstream of the spillway

5.1.9 Modify existing causeways downstream of the Dam at the following three locations: Reservoir Drive, Macdonald Rd and Gawler Ponds Rd

SA Water is proposing to modify three public downstream causeways on the Tod River to deal with unrestricted dam outlet flows and creek flows during flood events (see Figure 22 for locations). The upgrade of the causeways will accommodate the difference between the base flow and discharge to provide the same level of service to road users. The causeways are local roads and therefore assets managed by the Lower Eyre Peninsual Council, as such SA Water is consulting with the Council regarding the design for the causeway upgrades.

SA Water is also consulting with Natural Resources Eyre Peninsula regarding these modifications, as a Water Affecting Activity Permit will be required under the Natural Resource Management Act, 2004 for this work.

Refer to Appendix B for preliminary plans for the causeway modifications.

During construction, immediately downstream of the causeway upgrades temporary sediment and erosion control measures will be installed.

Figure 22. Aerial plan showing the location of downstream public causeway upgrades

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Figure 23 Causeway at Reservoir Drive (showing northern side)

Figure 24 Causeway at McDonald Rd (showing southern side)

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Figure 25 Causeway at Gawler Ponds Road (showing northern side)

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5.1.10 Backwater & Waterway Restoration minor earth works and revegetation

The reduced Full Supply Level (FSL) means that there will be exposed soil potentially vulnerable to erosion and /or weed invasion in the reservoir basin. A restoration plan is currently being developed by SA Water. The plan will comprise a mixture of both facilitated native vegetation regeneration and direct seeding/planting. The objectives of the plan are to establish sufficient perennial native vegetation to ensure the long-term stability of exposed soil surfaces following change to the new FSL, using native vegetation species compatible with the surrounding land use being a Reservoir Reserve. The native vegetation to be established also will be resilient to possible future episodes of inundation, a variable climate and flow regime, elevated salinity (in some areas) and resist weed invasion.

SA Water anticipates that only minor reshaping and reforming earth works will be required to create the main channel to the new (lowered) reservoir waterbody. An engineering survey is currently being undertaken to determine existing contours within the backwater reach, this is to enable a design to be completed for the channel.

Figure 26. Typical photo of the exposed backwater under proposed lowered Full Supply Level

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Figure 27. Proposed areas for restoration (blue= new Full Supply Level, oranage =middle reach proposed restoration, yellow= upper reach already regenerating, bright green= buffer inundation area and pink= exposed bank for terrestrial revegetation) 5.2 Proposed Project Schedule

As mentioned previously the project is currently in the detailed design phase and construction is proposed to commence mid-2016. The current proposed project schedule for delivering the project is outlined in Table 1 below.

Table 1. Anticipated Project Schedule (subject to change and approvals)

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6 Environmental Considerations

SA Water is committed to ensuring the Tod River Dam Safety Upgrade is constructed in a sustainable manner which minimises impacts to the surrounding environment. A detailed environmental impact assessment has been undertaken which has identified potential impacts of the project on the existing environment and community. An overview of potential construction activities and associated environmental impacts with the upgrade works are detailed in Table 2 below.

Table 2. Construction Activities and Associated Environmental Impacts Activity / Aspect Potential Environmental Issues/Impact

Use of vehicles, equipment & plant  Noise creating nuisance  Property damage from vibration  Emissions to air from equipment  Introduction/spread of weed seeds or plant pathogens  Fire (hot works or use near dry vegetation)  Nuisance to neighbours – access, light spill etc. Storage of materials, maintenance and  Spills leading to pollution and contamination of soil, water refuelling of machinery and equipment  Damage to vegetation and fauna  Emissions of noxious / toxic gases Washdown of equipment/plant  Pollution to water (watercourses or stormwater)  Introduction/spread of weed seeds or plant pathogens  Damage to vegetation and fauna Excavation and earthworks  Damage to vegetation and fauna  Disturbance or damage to Aboriginal and non-Aboriginal Heritage  Discovery/management of soil or groundwater contamination  Dust  Erosion of exposed surfaces  Pollution to water (watercourses or stormwater) Stockpiling / spoil management  Damage to vegetation and fauna  Pollution to water bodies from poor location / erosion /runoff  Water management and flooding  Dust  Inappropriate waste disposal/landfill  Contamination  Amenity of the estuarine/beach environment for water/beach users Waste Management and Disposal  Aesthetics – litter/ debris  Inappropriate waste disposal/landfill  Resource use Dredging  Inappropriate waste disposal  Pollution of water (watercourse)  Damage to vegetation and fauna  Impacts to recreational use of areas/nuisance Import of fill material  Introduction of weeds and diseases (phytophthora)  Contamination (imported) Site / compound establishment  Aesthetics – visually intrusive structures  Inappropriate waste management, litter  Access impacts and nuisance to neighbours  Noise creating nuisance Dewatering or other discharges/ water  Pollution released from site  Water management and flooding  Contamination  Damage to vegetation

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Management of contaminated or  Pollution to soil or water hazardous materials

6.1 Environmental Approvals

Table 3 below summarises the environmental and heritage regulatory requirements for the Tod River Dam Safety Upgrade.

Table 3. Summary of Likely Approvals Required for the Tod River Dam Safety Upgrade

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Legislation Administering Authority Trigger Project Response Environment Department of the Actions that could have a Based on detailed environmental Protection and Environment significant impact on matters of investigations completed during the Biodiversity national significance need planning and concept design phases of referral to the Australian Conservation Act the project, it has been determined that Commonwealth Government Minister for the 1999 Environment Minister Environment the project will not have a significant impact on any matter of national environmental significance and therefore no referral under the EPBC Act has been made. Native Title Act Attorney- General’s Existence of native title rights Advice sought from the Crown Solicitor’s 1993 Department over land and waters Office of the Attorney-General’s Department indicates native title has been extinguished for areas associated with the reservoir works.

Natural Department of Environment, Protection of natural resources A Water Affecting Permits will be required Resources Water and Natural including groundwater, surface for the channel breaches, causeway Management Act Resources water, native vegetation and upgrades and modifications to the soil. 2004 Eyre Peninsula NRM Board Pillaworta weir. SA Water is currently in

discussions with Eyre Peninsula Natural Works in watercourses and discharges may require water Resources regarding submission of the affecting activities permits. permit applications. Native Vegetation Department of Environment, Damage and disturbance to Minor clearance of native vegetation is Act 1991 Water and Natural native vegetation required to accommodate the two Resources upstream channel breaches and three Native Vegetation Council downstream public causeway upgrades. SA Water has a Standard Operating Procedure (SOP) which has been endorsed by the Native Vegetation Council for native vegetation clearance. For new works clearance approval is sought under Regulation 5 (1) (d) – Provision of infrastructure in the public interest. At this stage it is considered given the small amount of vegetation clearance required it will be under 0.5 hectare and a Level 1 (Minor Impact) under the SOP and can be approved internally by SA Water’s Manager Environment and Heritage Services. Development Act Minister for Planning Acts that constitute Approval is required under Section 49 of 1993 Development Assessment development require approval the Development Act, 1993, as the Tod Commission River Dam is State heritage listed on the South Australian Heritage Register. The relevant approving authority is the Development Assessment Commission.

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Legislation Administering Authority Trigger Project Response Environment Environment Protection Protection of the environment Prescribed activity to be identified and Protection Act Authority (EPA) from environmental harm licence held for such activity by the 1993 contractor or contractor to hold existing Prescribed activities of licence which is current. The Contractor environmental significance will be required to hold a current requires a licence Earthworks and Drainage licence throughout the duration of the works. An EPA dredging licence will also be required for removal of sediment around the outlet works, which are within the reservoir under water.

Aboriginal Minister for Aboriginal Duty of care to take all Completion of Aboriginal heritage risk Heritage Act Affairs and Reconciliation reasonable and practicable assessment indicates the project is low to Department for State measures not to harm moderate risk. SA Water’s Standard Development, Aboriginal Aboriginal cultural heritage Operating Procedure for the Discovery of Affairs and Reconciliation Aboriginal Heritage Sites will be implemented during construction. National Parks Minister for Environment Taking, using, keeping or Licence/Permit to be obtained if removal and Wildlife Act Department of Environment, interfering with a protected of or interference with protected plants or 1972 Water and Natural animal or plant (Section 88 and animals is proposed. Resources 89).

6.2 Native Vegetation

Some clearance of native vegetation will be required to accommodate the two upstream channel breaches, works at the syphon location and three downstream public causeway upgrades. Refer to Figures 28 to 31. Once the detailed design and likely construction footprints have been finalised a vegetation survey will be undertaken and approval for any clearance sought.

SA Water has a Standard Operating Procedure (SOP) which sets out assessment and approval requirments for impacts to native vegetation associated with SA Water’s works. The SOP has been approved by the Native Vegetation Council. For ‘new works’ clearance approval is sought under Regulation 5 (1) (d) – Provision of infrastructure in the public interest. To date, based on assessments of potentaial clearance requirements for the works it is considered given the small amount of vegetation clearance required it will be under 0.5 hectare and a Level 1 (Minor Impact) under the SOP. As such it can be approved internally by SA Water’s Manager Environment and Heritage Services.

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Figure 28. Channel breach No. 1

Figure 29 Vegetation to be removed at Channel breach location 1

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Figure 30. Channel breach No. 4

Figure 31 Vegetation to be removed at channel breach location 4

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6.3 Sediment and Soil Erosion Management

During detailed design erosion and scour protection works have been incorporated at the two breach locations and for the downstream causeway modifications. Also a energy dissipater will be installed to dissipate the head of water being discharged from the new primary (bellmouth) spillway to ensure the area downstream of the outlet tunnel is not eroded or scoured.

A Soil Erosion and Drainage Management Plan will be developed and implemented by the Construction Contractor for the construction phase of the project to ensure soil erosion and sediment management issues are avoided or minimised. The SEDMP will be developed in accordance with the Stormwater Pollution Prevention Code of Practice for Local, State and Federal Government. Refer to Section 2.1 for further controls. 6.4 Preliminary Environmental Management Plan

The Preliminary PEMP has been prepared to ensure that the environmental objectives and requirements for Tod River Dam Safety Upgrade are addressed and that potential environmental impacts on site are managed throughout construction.

The schedule of site specific impacts in the Preliminary PEMP outlines the minimum controls, monitoring program and strategies and the responsible persons for ensuring compliance for each site specific impact.

The purpose of the Preliminary PEMP is to:  Provide a framework for the management of the environment during construction of the Tod River Dam Safety Upgrade.  Address the statutory environmental requirements for the project;  Identify the actions to be undertaken to manage the environmental impacts of the construction works; and  Address community expectations and accountability by identifying management actions

7 Planning Assessment

The proposed development is located in the Water Protection Zone as described in the Lower Eyre Peninsula Development Plan and in the Tod River Water Protection Zone as described in the Tumby Bay Development Plan.

In determining the merits or otherwise of the proposal, SA Water has analysed the provisions of the Development Plan, as they apply generally throughout Lower Eyre Peninsula and Tumby Bay District Council’s and more specifically the Water Protection Zone and Tod River Water Protection Zone.

The relevant provisions of the Development Plan, which have been analysed are outlined in the following sections in terms of their relevance to the proposed development.

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7.1 District Council of Lower Eyre Peninsula Development Plan

7.1.1 Conservation

Council-Wide Objectives

Objective 36: The conservation, preservation and enhancement of scenically attractive areas, including land adjoining water and scenic routes.

Objective 38: The preservation of buildings and sites of architectural, historical, cultural or scientific significance.

The Tod River Dam Safety Upgrade project will involve modification of a number of structures including the outlet works, outlet tunnel, intake channel and Pillaworta Creek diversion weir. The only structures to be demolished include the rock groyne, concrete weir and retaining wall on the spillway. These structures were not part of the original dam construction and were added some 12 years later in 1934. Other heritage listed structures and buildings as well as contributory items including the valve house, reservoir keepers residence, Tod River diversion weir and Knotts Hill Reservoir will not be impacted by the upgrade works.

The proposed works will therefore not compromise or detract from the heritage value, character or integrity of the heritage place. The upgrade works will continue to conserve and preserve the heritage significance of the Tod River Da whilst ensuring the dam is safe into the future. The backwater restoration work proposed which includes revegetation with suitable local native species will further enhance the environmental and amenity value of the reservoir for potential future recreational use.

Currently SA Water allows limited public access at Tod Reservoir. Public accessible areas include a space located opposite the dam embankment this includes toilets, picnic tables, seats, barbeque areas and a museum. The Tod Reservoir is currently open to the public seven days a week from sunrise until sunset. These areas will not be impacted by the proposed upgrade works. There may be some access restrictions during construction works only.

7.1.2 Water Protection Zone

Objective 4: Efficient use and management of water.

Objective 5: Protection of the ecological functions of water resources and dependent biological diversity.

The Tod River Reservoir remains a contingency supply for the Eyre Peninsula but has not been used as a drinking water source since 2002 when it was taken offline due to salinity levels exceeding drinking water guidelines.The future of the Tod River Reservoir featured in discussions with the community during the development of the 2008 SA Water Long Term Plan for Eyre Peninsula. It was expressed that if the Tod Reservoir was unable to be used as part of the Eyre Peninsula water supply system, then consideration should be given to recreational access to the facility. In response, the plan recommended that discussions be held with the District Council of Lower Eyre and the District Council of Tumby Bay to determine an appropriate strategy for managing issues associated with the possible recreational access to the facility.

A Reservoir Recreational Fishing Taskforce has been established to oversee the Reservoir Fishing Access Project which is investigating the potential to use five offline reservoirs for recreational fishing. Tod River Reservoir is one of the offline reservoirs identified for investigation. Funding from the SA Government has provided for a research project at Tod River Reservoir which is being undertaken by Port

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Lincoln High School, as part of their environmental studies program. The project will look to chart the characteristics of the area and identify suitable species for recreational fishing. The proposed upgrade works may temporarily impact the research project during construction works. SA Water is working with the High School to mitigate impacts and confirm project scheduling.

The proposed primary (bellmouth) spillway will allow uncontrolled flows to be discharged from the reservoir. This will mimic a more natural flow regime in the downstream Tod River, pre reservoir. Currently water is only discharged from the reservoir during winter in accordance with conditions set out in a Best Practice Operating Procedure formally approved by the Eyre Peninsula Natural Resource Management Board and the EPA. This has been undertaken as part of water quality management within the reservoir. The new uncontrolled primary spillway in the longer-term will have ecological benefits for the downstream Tod River environment, through receiving flows at times when they would otherwise have been captured and retained within the reservoir.

Council Wide – Principles of Development Control

16 Additions and alterations to State and local heritage places, and new development or redevelopment of existing buildings adjacent to or in close proximity to those heritage places should:

(a) without mimicking the place, respect the underlying character integral to the locality, and the place;

(b) be sympathetic to the heritage place in respect of siting, scale of building and roof shape, bulk, height, advertising signs, external illumination, use and design of verandas, fenestration patterns, facade detail, fencing and boundary walls; and

(c) be constructed of materials which are in harmony with materials used in the heritage place. Appropriate materials include local stone, limestone, rendered and bagged masonry, painted weatherboard, galvanised or painted corrugated iron roofing, and painted timber joinery and trims. The use of highly reflective materials or very bright external colours, unpainted zincalume and glass curtain walls should be avoided.

20 The following items are designated as State Heritage Places in the Water Protection Zone: Dwelling - Green Patch Homestead, Port Lincoln; Part Sections 504 and 527 Hundred of Wanilla (CT 5168/400). Water Supply Structure, Tod Reservoir off White Flat - Koppio Road, White Flat; Section 306 Hundred of Louth.

For the modification works proposed to the outlet works, outlet tunnel and intake channel these will respect the underlying character and fabric of the heritage place. For example for the repair works to the outlet tunnel, rock from the dam embankment will be removed to gain access and stockpiled on site. The rock will then be reused on the embankment following completion of the tunnel work. Also as part of the outlet works modifications (primary spillway) the cast iron gauge boards rods will not be removed, only the inclined intake pipework in the bank up to the control rods will be. Thus keeping the heritage features in this location intact.For the intake channel breaches a small section of the concrete lined channel will be removed. This will be undertaken to not impact the integrity of the surrounding channel and rock amoruring and local revegetation work will ensure erosion and scouring impacts are minimised.

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7.2 District Council of Tumby Bay Development Plan

7.2.1 Conservation

Council-Wide Objectives

Objective 17: The conservation, preservation, or enhancement of scenically-attractive areas, including land adjoining water or scenic routes.

Objective 20: The preservation of buildings or sites of architectural, historical or scientific interest.

Refer to Section 7.1.1.

7.2.2 Tod River Water Protection Zone

Council-Wide Objective

Objective 1: Protection of the zone from development which could contribute to the pollution of surface or underground water resource.

Council Wide – Principles of Development Control

1 Development should be compatible with its use as a water catchment area.

Refer to Section 7.1.2.

8 Conclusion

Analysis of the Lower Eyre Peninsula and Tumby Bay District Council’s Development Plans indicates that the proposal to upgrade the Tod River Dam is not a variance to the principles and objectives therein. In fact, the Development Plans support the need to protect and conserve places of heritage value and provide for efficient use and management of water resources.

SA Water believes the Tod River Dam Safety Upgrade will not compromise or have a detrimental impact on the heritage value of the dam and associated infrastructure whilst ensuring SA Water is providing safe infrastructure for the benefit of the community.

During the safety upgrade works every measure will be taken to ensure it is managed carefully and sensitively to prevent inadvertent damage to the heritage listed dam embankment and contributory heritage items.

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9 References

 Lower Eyre Peninsula District Council Development Plan (Consolidated 19 February 2015)

 Swanbury Penglase (2010) Tod Reservoir – DTEI Building Management Project Services Heritage Asset Survey

 SA Engineering and Water Supply (E&WS) Department (1985) Tod River Dam: An Historical Account of Construction and Operation.

 Tumby Bay District Council Development Plan (Consolidated 7 February 2013)

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Appendix A – Photographic Record

Photo 1. Reservoir looking along top of wall (looking east)

Photo 2. Location of current intake (bouys), cast iron gauge boards

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Photo 3 Dam Embankment (downstream)

Photo 4. Valve house and operating rods (Source: Swansbury Penglase, 2010)

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Photo 5. Southern end of outlet tunnel

Photo 6. Pipeline below outlet tunnel (source: Swanbury Penglase, 2010)

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Photo 7. Offtake pipeline below dam wall

Photo 8. Southern end of Outfall Channel and Stilling Basin

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Photo 9. Rock groyne on spillway

Photo 10. Concrete weir and rock groyne upstream side of spillway

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Photo11. Spillway concrete weir

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Photo 12. Spillway looking back towards reservoir

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Appendix B – Concept Design Drawings

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Causeway preliminary design drawings

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Appendix C 1 Preliminary Project Environmental Management Plan

This Preliminary Project Environmental Management Plan (PEMP) has been prepared to identify the environmental management and mitigation measures to be implemented by SA Water’s Contractor during construction of the Tod River Dam Safety Upgrade project. The Preliminary PEMP also details SA Water’s commitments to the project and any relevant legislation and guidelines that may be applicable. 1.1 Environmental Management Measures

The Preliminary PEMP has been developed so that SA Water’s environmental commitments are met and construction activities are carried out in a way that minimises potential impacts to the environment. A copy of the Contractor’s PEMP and associated approvals (eg. Native Vegetation clearance approval) shall be available on site at all times.

The Preliminary PEMP covers:

 Flora and fauna management  Erosion control and stormwater management  Water quality management and monitoring  Air quality/dust management  Waste management  Weed and pest management  Storage and handling of hazardous substances  Noise and vibration management  Indigenous and non-Indigenous heritage management  Fire and emergency management  Disturbance of contaminated material  Traffic management  Visual amenity  Communication  Complaints Management

1.1.1 Objectives

The objectives of the Preliminary PEMP are to:

 Minimise and manage potential environmental impacts associated with construction activities;

 Facilitate the management of activities undertaken during the construction of the Tod River Dam Safety Upgrade in accordance with:  statutory approval requirements  recommendations from relevant authorities  SA Water standard operating procedures and principles

1.2 Environmental management structure and responsibilities

Environmental management is the responsibility of everyone working on the project. The Contractor Project Manager shall ensure that all contractor employees and sub-contractors are made aware of the contents and requirements of this document, and that all inductions are formally undertaken and recorded. The Contractor’s Project Manager (or nominated on site representative) is responsible for ensuring compliance with this document. Specific roles and responsibilities are outlined below in. Position titles within the table will need to be defined by the Contractor. For the purpose of this document, the following roles are used through the report to represent the responsible personnel.

Position Title Key Responsibilities SA Water Project  Oversee the establishment, implementation and maintenance the Manager PEMP, including consultation requirements;  Liaise with statutory agencies and report environmental incidents as required;  Monitor statutory approvals obtained by the contractor;  Review and approve the PEMP prior to commencement of works on site;  Review audits and incident reports to monitor contractor’s compliance with the PEMP;  Ensure corrective action is implemented where necessary and PEMP updated where required; and  Monitor and report to EPA on PEMP performance Contractor Project  Coordinate the approval / endorsement of the PEMP with SA Water; Manager  Ensure that the PEMP is developed and implemented to address the management of all environmental issues;  Ensure that all project personnel are appropriately inducted and where a deficiency is identified, trained in the environmental requirements of the project;  Review and sign off management of environmental incidents to ensure that they have been appropriately addressed and systems/control improvements implemented;  Ensure that regular assessment/review of the environmental risks is undertaken and that the PEMP is amended (subject to the approval of SA Water) to reflect changing risks (of knowledge) if appropriate;  Audit works and review conformance with the requirements of the PEMP. Ensure that corrective action is implemented where necessary;  Report environmental incidents, enquiries and complaints to regulatory authorities and SA Water;  Ensure that corrective actions are implemented and measures are developed to mitigate breaches to PEMP conditions;  Ensure all complaints are registered and promptly responded to; and  Monitor works and report to SA Water on PEMP performance.

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Position Title Key Responsibilities Contractor  Develop the site specific PEMP in consultation with the Contractor Environmental Project Manager; Representative (on-site)  Submit the PEMP to the Contractor Project Manager and SA Water for approval;  Implement and manage the PEMP;  Monitor, audit and conduct surveillance of the implementation and effectiveness of the PEMP and report its effectiveness;  Engage specialist environmental advice where required;  Identify and manage environmental incidents promptly and effectively in consultation with the Contractor Project Manager;  Report environmental incidents, enquiries and complaints to the Contractor Project Manager who will then inform SA Water, and relevant statutory authorities if necessary. Document actions taken to rectify the situation.  Ensure that all project personnel are appropriately inducted and where a deficiency is identified, trained in the environmental requirements of the project; and  Inform Contractor Project Manager of any queries from Statutory Authorities. Contractor personnel  Undertake works in accordance with the PEMP requirements; and  Promptly report environmental incidents, enquiries and complaints to the Contractor Environmental Representative or Contractor Project Manager

1.3 Training, Awareness and Responsibilities

The Contractor’s Project Manager shall provide the following training to all personnel that enter and undertake work on site:

 site induction  familiarisation with the requirements of the PEMP  environmental emergency response training  familiarisation with the site environmental controls (bunting, marked vegetation etc.)  familiarisation with the use of plant and materials for efficiency and minimisation of potential environmental impacts (e.g. vehicles in heavily vegetated area)  Identify staff that may require targeted environmental training for specific work duties in more sensitive environmental areas.

Records of all training will be maintained and kept at the site office. The records will provide the following details:

 who was trained  when training was undertaken  name of trainer  general description of training content.

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1.3.1 Site environmental Inductions

Site environmental inductions for site employees and contractors shall be conducted and recorded. The induction will outline the site specific environmental issues and objectives and controls covered by the PEMP and any associated documentation. A Site Environmental Induction Register shall be maintained and kept at the site office. Initial inductions prior to works beginning shall be conducted by the Contractor’s Environmental Representative. The Contractor’s Project Manager will ensure all visitors to site are inducted into the PEMP requirements. 1.4 Inspection, Monitoring and Auditing

To assess the implementation of the PEMP, an environmental inspection and auditing schedule shall be implemented by the Contractors Environmental Representative during the construction of the project. In general site inspections shall be carried out on a daily-weekly basis and environmental audits on a monthly basis. These intervals however, may need to increase in order to capture key milestones or works within more sensitive environmental areas. 1.4.1 Environmental Inspections

During construction, the Contractor’s Site Supervisor and or Contractor’s Environmental Representative shall conduct daily visual observations and weekly environmental compliance inspections of all active construction areas. This shall involve completing a weekly environmental inspection checklist which is forwarded to SA Water’s Environmental Representative.

Daily observations shall occur prior to the commencement of daily work activities. In particular all open trenches shall be observed by foot in order to ensure that fauna have not been trapped overnight.

Weekly environmental inspections shall be undertaken of the site using a weekly environmental inspection checklist to document any non-conformances and/or corrective action requirements. Environmental site inspections should also be undertaken prior to key events i.e. heavy rainfall. Copies of the weekly inspection checklists shall be available at the project site office and copies sent to SA Water’s Environmental Representative. 1.4.2 Environmental Auditing

In addition to the environmental inspections detailed above, a monthly audit program (the first conducted 2 weeks after beginning of construction) shall be established to assess and record whether activities are in conformance with regulatory requirements and the PEMP. The audit program will involve:

 Environmental Compliance audits conducted by the Contractor’s Environmental Representative to assess the level of compliance with the PEMP.  Environmental Compliance audits by SA Water.  Environmental Management Systems Audits by the Contractor.

Records of all audits (completed checklists and reports) will be available at the project site office. The audit will check the site activities against the management controls highlighted in the CEMP. This will also provide an opportunity to discuss and review the following:

 project status

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 any environmental issues  mitigation measures implemented  effectiveness of control measures  environmental incidents or complaints  monitoring results  other relevant information in relation to the environmental management of the project  areas for improvement

1.4.3 Environmental Inspection and Audit Schedule

A preliminary environmental inspection and auditing schedule to be implemented for the project is outlined below in Table 2.2.

Table 1.1 Environmental Inspection and Audit Schedule

Audit / Inspection Type Frequency Responsibility Observation Daily Contractor’s Site Supervisor/Field staff

Inspection Daily Contractor’s Site Supervisor/ Contractor’s Environmental Rep

Inspection Weekly Contractor’s Site Supervisor/ Contractor’s Environmental Rep

Internal Environmental Audit Monthly (first conducted Contractor 2 weeks into construction)

External Environmental Audit TBA SA Water or other third party

1.4.4 Non-Conformance and Corrective Action

The Contractor shall carry out monthly or key event targeted audits in order to determine any non-conformance and corrective action procedures. The audit will be based on the site specific environmental impacts and management highlighted in this document:

 Inspection to identify potential non-conformances.  Implementation of any non-conformance and/or corrective actions requirements as may be necessary.  Reporting of any incidents/non-conformances to SA Water's Environmental Representative.  Corrective action procedures/actions to rectify deficient environmental protection measures.  Undertaking investigation procedures to identify reasons for incident / non-conformance.  Provision for the adjustment of procedures/plans to reflect corrective action.  Identification of areas for improvement

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In the event of a non-conformance the Contractor’s Environmental Representative shall:

 Follow up and verify the implementation of the corrective action that was required  Keep details of all non-conformances and corrective action requests issued on the project on the Project Files.

Environmental non-conformance reports shall be completed in response to any identified environmental non- conformances, as soon as practicable or no later than 24 hours. Reports shall include details of non-conformance and actions implemented to rectify the non-conformance. 1.5 Environmental Incident Management and Emergency Response Plans

Any environmental incidents shall be investigated and reported to the SA Water’s Environmental Representative as soon as practicable or no later than 24 hours from the commencement after stopping work. Reports will include details of incident and any corrective actions taken. Reporting to government authorities will be in accordance with legislative requirements and wherever appropriate.

Table 1.2 Emergency Contacts Environmental contact Contact detail Ambulance, Fire 000 Police Emergency 000 Police Assistance 131 444 Environmental Protection Authority 8204 2004 SAW Environmental Rep (Charmaine Goodes) 7424 3619 or 0404 836 567 Alternative SAW Environmental Rep (Tara Hage) 7424 1903 or 0457 502 029 SAW Project Manager (Matt Simone) 7424 1285 or 0477 383 630 Lower Eyre Peninsula District Council General Enquiries 8676 0400 Tumby Bay District Council General Enquiries 8688 2101 Natural Resources Eyre Peninsula Pt Lincoln Office: 8688 3111 SA National Parks and Wildlife Info line: 8204 1910 Department of Environment and Natural Resources Info line: 8204 1910 Contractor Project Manager TBA Contractor Environmental Rep TBA Contractor Communications Officer TBA 1.5.1 Environmental Incident Reporting

Environmental incidents including but not limited to the following must be reported by completing an incident report form. It is the responsibility of all staff on site to report environmental incidents. The Contractor’s Project Manager must ensure these are sent to the SA Water Environmental Representative within 24 hours of the incident occurring.

 Chemical Spill

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 Vegetation disturbance/clearance that was not approved

 Unexpected water discharge/burst

 Disturbed or injured native fauna

In the event of an incident action should be taken to minimise impacts. Where an environmental incident causes or threatens to cause environmental harm it must be reported to the EPA in accordance with Section 82 of the Environment Protection Act.

All Environmental Incidents captured via incident reporting must follow the Contractor’s Incident Reporting Procedure. It is the responsibility of the Contractor to report the incident to any relevant authorities, where appropriate within 24 hours. 1.5.2 Complaints

All complaints received shall be forwarded to SA Water’s Project Manager who will liaise with appropriate stakeholders to address any complaints. The Contractor’s Project Manager shall record all complaints and resolutions achieved. The Environmental Auditing process will ensure that these measures are adhered too. 1.6 Other Statutory Reporting

Reporting may be required to:

- the Eyre Peninsula Natural Resource Management Board for the Water Affecting Activity Permit

- the EPA, as part of any licence conditions i.e. earthworks and drainage and dredging

An audit of the amount of clearance conducted may need to be undertaken by a suitably qualified consultant after works are complete and the report provided to the Native Vegetation Council for reporting and SEB offset purposes.

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2. Schedule of Site Specific Impacts and Management

This section includes the possible controls, monitoring program and strategy and the responsible persons for ensuring compliance for each site specific impact. The Contractors Project Manager shall, as a minimum, address the following controls during works:

 Flora and fauna management  Weed and pest management  Stockpile, erosion and stormwater management  Construction traffic management  Water quality management and monitoring  Air quality/dust management  Waste management  Storage and handling of hazardous substances  Noise and vibration management  Indigenous and non-indigenous heritage management  Fire and emergency management  Traffic management  Visual amenity  Communication

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2.1 Environmental Management Controls

The following pages include suggested control measures that to be used during works to mitigate environmental impacts. The effectiveness of the controls should be monitored as per Section 5.7.

Environmental Impact Water Quality Impacts and Construction Water

Objective  To ensure all statutory requirements are complied with relating to Environment Protection (Water Quality) Policy 2003  Prevent or minimise adverse effects on surface water and groundwater quality, flows and drainage Performance indicators  No deterioration on receiving waterway quality including for pH, turbidity, dissolved oxygen, chlorine residual and visual oils and greases.  Construction materials and sediment laden runoff prevented from entering waterbodies/stormwater

Controls Pre Construction  Review construction area to minimise potential for surface runoff to enter the site and to identify controls for runoff leaving the site  Identify water bodies/drainage lines (including stormwater side entry pits) and identify sediment /erosion control requirements eg silt fences around stockpiles, silt sock locations at stormwater entry pits etc.  Review project activities that will require protection and installation of controls  Identify designated stockpile/laydown areas away from drainage lines  Schedule works that will occur in watercourses /drainage lines for periods of favourable weather (eg dry periods) or implement construct techniques that reduce construction footprint (eg directional drilling) Construction  No discharge to a watercourse (including stormwater) without approval from SA Water’s Environmental Services  Install erosion and sediment control devices prior to works commencing (silt fences, silt socks, hay bales diversion drains, geotextile fabric) and ensure maintained (eg remove debris from sediment control items regularly  Ensure stockpiles have erosion control devices installed particularly on downslope of stockpiles  Monitor weather forecasts to identify rain events and ensure control measures in place  Inspect and maintain/clean sediment control items regularly  Clearly define access tracks and routes and use these  Compact, backfill and resurface disturbed or unsealed areas as soon as possible  No onsite refuelling, service or maintenance or cleaning in areas where runoff/wastewater may enter stormwater system or waterbodies.  All equipment washdown to be undertaken within an identified washdown area, no discharge of washdown water to stormwater or watercourse.  Turbid water from concrete cutting etc. not to be directed to stormwater or watercourses

 Comply with any permanent water conservation measures

Environmental Impact Damage to Vegetation

Objective  Protect and minimise impacts to vegetation as part of the works Performance indicators  No unauthorised clearance  Protection in place (bunting, marking off) for vegetation on site where appropriate Controls Pre construction  Identify vegetation in/adjacent to the works area that may be impacted and plan access routes, plant/vehicle parking, stockpiles and material storage locations away from vegetation  Seek approval for any vegetation that requires clearance or will be impacted following the principle of minimising impacts wherever possible Construction  No clearing of native vegetation (unless otherwise approved)  Utilise existing access tracks/roads where available or ensure access via previously disturbed cleared areas.  Park vehicles and store any equipment or stockpiles (including soil) in areas that are designated/pre-marked as laydown areas or already cleared (e.g. access tracks) to avoid smothering or damaging native vegetation.  Avoid impacts to roots (10m from drip line optimal) wherever possible. If any roots are discovered during the works these are to be bridged where possible (roots ≥ 50mm). Roots discovered <50mm which are broken are to be clean cut with a saw.  Where working in roadside areas care shall be taken not to impact in areas where Department of Planning, Transport and Infrastructure or district council based ‘Roadside Significant Markers’ are present. These identify that a section of roadside reserve contains a significant feature such as rare flora, matters of cultural heritage or significant native vegetation. Contact Environmental Services for details if working in these areas.

Environmental Impact Introduction of weeds and pathogens

Objective  No introduced pest plants, pathogens into worksite and no movement of declared plants in an uncontrolled manner. Performance indicator  No new incursions of declared plants or plant pathogens post construction Preconstruction  Ensure any declared plants within work area are identified  Ensure plant and machinery washed down prior to entry to work zone.  Installation of wash down area/s Construction For imported fill material the Contractor shall inspect the quarry to ensure weed contamination risk is low and that the quarry has in place a quality control process. As a risk based approach, material is considered weed/pest free if: o Quarry material is sourced at depth and is not stockpiled/surface material.

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o Sourced from a licenced quarry (a quarry site inspected by the local NRM Board confirming appropriate weed management strategy is in place that minimises the risk of weed contamination of material taken from that site). o If quarry material is considered top soil, inspection is required to ensure fill is weed/pest free.  Appropriate washdown of machinery if sourced from weed or disease risk areas or have carried imported material.  All equipment washdown to be undertaken within an identified washdown area and water contained within that area (no discharge of washdown water to stormwater or watercourse).

Environmental Impact Fauna

Objective  Prevent or minimise disturbance to native fauna and their habitat. Performance Indicator  Fauna within works area not adversely impacted Controls Pre-construction  Ensure contact list for local/regional fauna rescue organisation available Construction  Any injury or death of native wildlife caused by the construction activity will be reported to the SA Water Environment Officer  If tree hollows are present and trees require pruning/ clearing, these must be checked for fauna before removal  If any fauna is found, the SA Water Site Representative will report the details of discovered fauna to the SA Water Environment and Heritage Services Team for relocation if required.  Where native fauna is likely to be present within works area minimise risk of entrapment (eg close trenches overnight)  Salvage hollow logs, rocks, logs, boulders etc. for use in the SEB offset site at Millbrook Reservoir Gate 32  Implement soil erosion and drainage management measures to prevent sediments or pollutants from entering waterways.

Environmental Impact Stockpile, Erosion and Stormwater Management

Objective  Minimise the potential for environmental impacts associated with poor stockpile management. Performance indicator  No sediment laden runoff leaving works area  No dust from stockpiles leaving site  Management of contaminated spoil in accordance with EPA requirements Controls Preconstruction  Identify designated stockpile/laydown areas away from drainage lines, drip lines of trees/vegetated areas  Identify potential soil contamination that may require management and ensure appropriate areas for stockpiling established Construction  Follow requirements of the SA EPA Guideline for stockpile management including:  Materials with a potential to produce leachate and contaminated runoff should be stored in a sealed and bunded area.  Limit stockpile height  Materials must be stored away from surface watercourses, flood zones and groundwater recharge areas to prevent environmental harm to water.  Locate designates fill stockpiles away from vegetation and drainage lines.

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 No stockpiling within the drip lines of trees to minimise compaction of the root zones.  Maintain separate stockpiles for different materials.  Remove excess spoil from the site and dispose of in an EPA licenced landfill or other appropriate location as approved by the Environmental Coordinator.  Install erosion control measures such as silt fences, hay bales, sedimentation sumps, sand bags, geotextile fabric, diversion drains or other appropriate measures on the down slope side of stockpiles.

Environmental Impact Air Quality (Dust, emissions, odours )

Objective:  Ensure that particulate and gaseous emissions do not cause environmental nuisance or harm to surrounding community and environment. Performance indicator  No community complaints during construction regarding air quality (dust, odours)  No impact to adjacent sensitive landuses (eg houses, schools)  Results from visual inspections show no visible dust leaving boundaries of construction site Preconstruction Controls  Identify site access, laydown areas and stockpile locations  Identify sensitive receivers and dust monitoring requirements.

Construction  Restrict high risk activities during extreme weather events (strong winds, hot dry weather) to dry/calm conditions if required to limit dust generation.  Water cart available to control dust, if required.  Minimising the extent of exposed and stripped surface areas within the project area.  Ensure construction facilities are designed and operated to prevent the emission of smoke, dust, cement dust and other potentially deleterious matter into the atmosphere.  Maintenance of vehicles and equipment.  Reduce idling time of vehicles and plant.  Reduce vehicle speeds on dirt roads to reduce dust emissions.  Cover loads if dust is an issue.  Stockpiles to be managed to reduce dust (manage height, covering wetting as required).  Undertake inspections of dust/ emissions controls and activities and respond accordingly.

Environmental Impact Noise and Vibration impacts

Objective: To ensure noise and/or vibration from construction does not cause an environmental nuisance or adversely impact amenity/ people or result in damage to property. Performance Indicator  No complaints related to noise  No property damage resulting from vibration Controls Preconstruction

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 Plan timing of noisy activities to avoid impacts on nearby residents  Select good plant and equipment that generates low noise and vibration  Consult with stakeholders (though SA Water) in advance of works  Ensure machinery has appropriate mufflers, silencers and/or enclosures fitted  Investigate alternative processes/methods that will reduce noise and vibration Construction  Construction activities should be in accordance with the EPA Construction Noise Information Sheet (EPA 425/10). o Normal hours of work should be between 7am and 7pm, Monday to Saturday o Work outside these times may be permitted to avoid impacts such as unreasonable interruption of vehicle or pedestrian traffic movement, Environmental Services should be advised in such cases.  Notify nearby residents/landowners if any project activities proposed outside of normal construction times (though SA Water)  Use appropriate equipment for the task  Regularly maintain plant and equipment used during construction (eg rotating parts to be balanced)  Enclose, where practical, stationary constant noise sources such as air compressors, generators etc. to reduce noise levels  Maximise the distance between vibration sources and receivers if possible  .  Site management and implementing worksite induction training on the following methods to minimise noise from construction: o Taking care not to drop materials such as rock, to cause peak noise events, including materials from a height into a truck; o Orientate Plant known to emit noise strongly in one direction, such as the exhaust outlet of an attenuated generator set, away from noise sensitive areas; o Shut down equipment and vehicles when they are not being used and between intermittent works; o Use only necessary power to complete the task.  Construction traffic including minimising the use of exhaust breaks where safe to do so, maintaining unsealed roads and drivers only using necessary power when entering and existing the site  Maintain complaints register and respond to complaints received

Environmental Impact Storage and Handling of Hazardous Substances

Objective Manage the storage of hazardous substances to avoid contamination of surrounding soils and water. Performance Indicators  Hazardous substances stored appropriately and spill kits on site.  No impact to soil/groundwater associated with storage use of hazardous substances. Controls Preconstruction  Plan for sufficient plant and equipment to ensure minimal maintenance and refuelling required on site  Identify areas for storage, refuelling and spill kits.  Establish bunded and lockable container for storage in compound for storage Construction  Hydrocarbon spill kit available and personnel trained in the efficient use spill kits readily available.

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 Minimise quantities of hazardous substances, fuels and lubricants stored on site. Store and handle chemicals/hydrocarbons as per the product MSDS. MSDS to be available at all times for hazardous substances that are used or stored.  Storage and management requirements for hazardous substances in accordance with legislative guidelines including bunding, impervious floor and in a location not subject to flooding and within a pre-marked laydown area.  All waste oil to be collected and disposed of at an EPA Licensed Recycling Depot.  Ensure no discharge of hazardous substances or fuels/lubricants into water courses or storm water.  The decanting, mixing, applying, storing of chemicals including paint, or the refuelling of vehicles or equipment shall not be conducted within 50 m of a watercourse or drainage channel.  In the event of a minor spill (e.g. diesel), affected soil to be excavated and disposed of at an appropriately licenced landfill.  In the event of a major fuel or chemical spill, immediately notify SA Water Site Representative of the spill and if known, any associated details (e.g. Type of spill, source, time of incident).

Environmental Impact Contamination

Objective . Identify potential contamination issues on site. . Manage such issues to protect employees, the public and the environment. Performance Indicator  No impact to soil/groundwater associated with contaminated material.  No risk to employees from encountering and managing contaminated material. Controls Preconstruction . Undertake assessment of risk of encountering contamination based on historical or surrounding land uses Construction . The discovery of contaminated soil and/or groundwater is to be immediately reported to the SA Water Site Representative so as the appropriate authorities can be notified. . All materials containing asbestos to be removed by a licenced contractor and disposed of in compliance with EPA and council requirements. Refer to the EPA’s ‘Wastes containing asbestos – removal, transport and disposal’ http://www.epa.sa.gov.au/xstd_files/Waste/Guideline/guide_asbestos.pdf . In the case of unusual odours or visual observation being made during excavation, work is to cease and the SA Water Environmental officer contacted. Isolate the suspected contaminated area. . Separate any suspected soil/fill, store on impervious material (tarp/fortecon) and cover to prevent rain or wind mobilising material. Any contaminated fill requires NATA Certified Laboratory Test Results and must be disposed to an EPA licensed landfill . Waste transfer certificates retained for contaminated material and available on request. . Groundwater contamination is required by law to be reported to the EPA.

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Heritage Impact Aboriginal Heritage Management

Objective  Prevent or minimise Disturbance to significant cultural heritage sites  To ensure all statutory requirements are complied with and controls listed below are implemented to minimise potential disturbance to unknown sites. Performance indicators  Management of any Aboriginal discoveries in accordance with SA Waters Standard Operating Procedure for the discovery of Aboriginal Heritage Controls Pre Construction  Undertake an AAR register search to determine known heritage sites within the works area and complete heritage risk assessment Construction  As part of the site induction for all employees the Contractor shall ensure SA Water’s Standard Operating Procedure (SOP) for the Discovery of Aboriginal Sites is included (see Appendix A)  In the event of any unidentified culturally significant site or object being discovered during construction, works in the area will stop and the procedure for the (see Appendix A)

Impact Fire Management

Objective  Ensure compliance with South Australian Country Fire Act 1989  To ensure that construction activities do not cause and emergency incident such as starting a fire. Performance indicator  No emergency incidents as a result of construction activities. Controls Pre Construction  Review fire danger season and schedule works to minimise risks associated with fire, where possible  Conduct a risk assessment on days notified as total fire ban days before undertaking any works on site  Have in place an emergency response plan for the works Construction  Fire extinguishers/on site firefighting equipment to be available on site and in work vehicles, major plant and equipment and ensure workers trained in their use  Hot work permits required for ‘hot works’ on total fire ban days, no works on catastrophic fire rating days unless approved.  Maintain all machinery and vehicles in good condition to minimise risk of fires  Fit plant with spark arrestors  No burning off or burning of wastes

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Impact Waste Management

Objective  To ensure all statutory requirements are complied with relating to management of waste (including Waste to Resources Policy)  Maximise reuse and recycling of materials

Performance indicators  Compliance with waste management requirements Controls Pre Construction  Adopt the principles of the waste management hierarchy and plan/procure materials that : o Avoid the production of waste o Minimise the production of waste o Maximise reuse and/or recycling of waste o Recovery of energy or other resources from waste o Treatment of waste o Disposal of waste in environmentally sound manner  Confirm the relevant statutory requirements for disposal of wastes from site to Construction  Carry out works to minimise waste production  Segregate wastes to maximise reuse/recycling -  Provide and use sealed waste and recycling bins  Dispose of waste materials, waste oils etc. at EPA licence facilities  Waste to be removed from site using appropriately licenced waste transporters  No burning of wastes  Protect against vandalism

Impact Visual Amenity

Objective  Prevent or minimise negative impacts from construction activities on the visual amenity of the local area. Performance indicators  No community complaints regarding visual amenity during the construction period Controls Pre Construction  Establishment of site facilities or undertaking of any other activities which are likely to adversely affect the visual amenity of the surrounding area are not permitted Construction  Implement waste and dust management controls  Stockpiles, equipment and large plant to be located in areas of the project least likely to affect visual amenity (away from houses etc.).  Ensure good housekeeping and waste management on site.

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Impact Greenhouse Gas Emissions

Objective  To ensure all statutory requirements are complied with including reporting in accordance with the National Greenhouse Energy Reporting System (NGERS)  Reduce greenhouse gas emissions during construction Performance indicators  Documenting of fuel usage, concrete and steel volumes for NGERS reporting Controls Construction  correct maintenance and servicing of all vehicles and equipment to ensure that they are operating at their maximum level of efficiency  use or purchase of efficient equipment  locating any pick-up or drop-off points close to the point of construction  use of alternative or low emissions fuels, including biodiesel and LPG  transporting waste and materials only where there is enough for a full load  aiming to transport materials, equipment and waste during off-peak periods  documenting fuel usage, concrete and steel volumes for NGERS reporting

Impact Traffic Management

Objective  To minimise the impact to the public associated with the construction of this project

Performance indicators  Minimise complaints from the public regarding traffic management

Controls Pre Construction  Assess impacts on traffic flow, direction and timing as part of project.  Assess traffic management requirements to ensure safety to site workers and community  Develop traffic management plan for works Construction  Traffic management controls implemented as per traffic management plan

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APPENDIX A Discovery of Aboriginal Heritage Procedure

Have you found a site, object or skeletal remains that may be Aboriginal Heritage?

 See example pictures on next page. STOP Do not disturb/remove/touch or displace the site, object or skeletal remains.

 It is an offence to disturb or interfere with Aboriginal heritage or skeletal remains. PROTECT

Restrict access. Site supervisor to take note of:

 Location in relation to site works (pref GPS).  Any immediate threats to heritage e.g. construction activities, vandalism, water level.

 Name and contact details of the person who made the discovery.

NOTIFY Site Supervisor to immediately notify:

 SA Water representative Charmaine Goodes EIA Officer 0404 836 567.  Local Police or 131 444. If suspected human remains have been discovered.

MANAGE

The SA Water EHS Team will appropriately manage the incident with appropriate guidance from:

 Local Police (where skeletal remains have been discovered).  Aboriginal Affairs and Reconciliation.  The local Aboriginal community.  An Archaeologist may also be consulted.

RESUME The SA Water Project Manager will notify the contractor when works can resume.

 This decision will be made in partnership between the PM and EHS team.   There may be conditions that need to be followed to allow work to resume.

BE AWARE OF YOUR CULTURAL HERIATGE OBLIGATIONS & ACT RESPONSIBLY

Example Pictures

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Tod Reservoir DTEI Building Management Project Services Heritage Asset Survey

South Australian Heritage Register No: 14213

Architects Swanbury Penglase Architects Pty Ltd 244 Gilbert Street Adelaide 5000 Ph: (08) 8212 2679 Fax: (08) 8212 3162 Swanburypenglase.com ref 08524, No 214 14213

Database

Tod Reservoir DTEI Building Management Project Services Heritage Asset Survey

About the Project Description of the Database Reports The Department for Transport, Energy and Database reports provide a common template for consistency of recorded information Infrastructure (DTEI) has commissioned collected on site. Swanbury Penglase Architects to undertake a survey of all state SAHR Name is the place name as listed on the South Australian Heritage Register and government owned places listed on the also identified with its SAHR No. A heritage place may have multiple Components South Australian Heritage Register. The which have been separated for individual reporting based on construction or physical location. Items identified on site as having potential heritage value related to the place, purpose of the survey is to collect, check but which are not specifically mentioned in the SAHR Place name, are recorded under and consolidate information about those Contributory Heritage Components to identify these for potential future analysis and places to help government in their long assessment. The Date of the site survey is recorded as well as the Author who carried term management of those places. out the assessment.

The project deals only with built places on Type references the subject index utilised for the South Australian Heritage Register the State Register, and does not include and has been cross referenced with code numbers defined by AS 2482 (1989) for those on National or Local lists. Natural, feature-coded digital mapping for use in the GIS database. The South Australian geological, aboriginal and archaeological Government SAMIS No. is also shown for identification. Not all places had a SAMIS places are also excluded. number but these have been especially procured for this project.

GPS fields provide the actual position of the each heritage item, recorded in both decimal degrees and Lambert Conformal Conic Projection, and a description of where the primary GPS point was taken on site. In some instances Other GPS References were collected to identify often widespread elements, some of which have been identified as Contributory Heritage Components.

Contact Details provides information about people contacted regarding the heritage place and was current at the time of preparing this report. Where available, Attached Information as shown has been included with the report. CMP and Report Details lists reports about the heritage place, their date of preparation and where the document is Definitions held. Any Inaccuracies in Existing Information collected as part of this survey has been BCA Building Code of Australia recorded. Only Statements of Significance within a CMP are included in this report and CMP Conservation Management a general review of existing SAMIS drawings has been undertaken during the site Plan survey to highlight any obvious discrepancies. Component An element that contributes to the significance of the Priority Status number indicates an overall conservation and maintenance rating from heritage place the visual site inspection. The rating numbers indicate the following: CT Ref Certificate of Title Reference 1 Immediate action required DEHHB/ Department for Environment 2 Action recommended within 2 years DENRHB and Heritage (changed to 3 Action recommended within 5 years Department for Environment 4 Normal cyclical maintenance to be maintained and Natural Resources part 5 Significant qualities compromised to warrant review of SAHR listing way through project), Heritage Branch An Estimate of Costs provides a broad opinion to indicate the value range of work DTEIHU Department for Transport, necessary to deal with conservation issues. No quantities have been prepared in Energy & Infrastructure, determining these figures. Heritage Unit GIS Geographic Information Primary Images are those included in this report. Other Images have been provided to System DTEI and are stored on CDROM. GPS Global Positioning System LGA Local Government Area Information about specific elements of Construction of the heritage component is Place The site, area, landscape, or recorded with a visual Condition Assessment of those elements noted and given a building(s) together with rating from the following: 1 – dilapidated, 2 - poor, 3 - fair, 4 - good, 5 - excellent. This associated contents and information is collected as a result of the site survey, which is restricted to the exterior surrounds listed in the SAHR of the place, although internal information is also collected where access to the interior SAHR South Australian Heritage was possible. The elements recorded are primarily external with the exception of walls, Register doors, windows and services which can also have an internal component, while floor, SAMIS Strategic Asset ceiling and fittings relate purely to the interior of the place. This assessment process Management Information does not apply to Contributory Heritage Components which are identified only and not System assessed in detail. Tod Reservoir Component 1 of 1 14213

SAHR Name: Tod Reservoir SAHR No: 14213

Type: Utilities - 3607

Component: Reservoir SAMIS No: 09390

Location: Off Reservoir Road Status

Town WHITE FLAT LGA: District Council of Lower Eyre Peninsula Priority Status 4 Estimates Costs N/A Date: 04-Aug-10 Author: Andrew Klenke

CT 5841/603 H510700 S306 CT Title GPS Actual Latitude: S 34.48651 Land: Section 306, Hundred of Louth, in the area named Whites Flat Actual Longitude: E 135.84915

Owner: South Australian Water Corporation UTM Northing (53H) 6183571 Agency: South Australian Water UTM Easting (53H) 0577968 Lease Details: N/A Location: Centre west end of wall. Contact Peter Samuel (Land Manager - SA Water), 0418 82 8008 Details: Morgan (Work Planner - SA Water), (08) 8621 4503

General Description Contributory Heritage Components Earth embankment wall for Reservoir with clay core completed in 1922 Head works at Tod River including concrete weir and gates constructed at orientated east-west across watercourse west of Tod River. same time as Reservoir (CT 5094/898 F32572 Q1, CL 1320/6 F32572 A4). Concrete weir at Pillawarta Creek including concrete weir and gates constructed at same time as Reservoir (CT 5094/898 F32572 Q3). Concrete lined open diversion channels and associated tunnels connecting weirs with east side of Reservoir constructed at same time as Reservoir (CT 5094/898 F32572 Q1, CT5408/465 F199786 Q92, CR 5757/934 H510400 S229, CT5408/465 F199786 Q91, CR 5756/500 H510400 S49, CR5757/933 H510400 S228, CT 5094/898 F32572 Q3, CR 5752/932 H510400 S227, CT 5773/969 H510400 S224, CR 5773/969 H510400 S225). Spillway on east side of Reservoir constructed at same time as Reservoir (CT 5841/599 H510700 S307). Valve house on northeast side of wall with operating rods extending down N/A Interior Viewed below water level and cast iron gauge boards. Current Use Keepers residence located south side of Reservoir wall probably contemporary Reservoir. with Reservoir wall. Pumping station (1951) located south of Reservoir wall. Memorial to death of workmen on west side of Reservoir wall (CR 5757/454 H510700 S461). Knott Hill Reservoir (not inspected) (CT 5753/452 H510400 S226, CR 5757/936 H510400 S238, CT 5831/276 H510400 S203, CT 5991/520 H510400 S207, CT 5352/12 H510400 S204, CT 5773/969 F199528 Q91, CT 5773/969 H510400 S223, CT 5841/599 H510700 S307). No CMP Existing CMP and Report Details:

Attached Information Inaccuracies in Existing Information Not all components of Reservoir appear to be included in SAHR listing. Yes Certificate of Title No Statement of Signficance CMP No SAMIS Drawings No Statement of Signficance SAHR

Yes Aerial Imagery Yes Other SAHR File Listing Info

Other GPS References East end of Reservoir wall - Lat: S 34.48690, Long: E 135.85287 (WP 1108). Centre east elevation of Keeper's residence - Lat: S 34.48970, Long: E 135.85153 (WP 1103). Centre northeast end of Pump House - Lat: S 34.48955, Long: E 135.85213 (WP 1104). Centre of inlet end of channel at bridge over channel along east side of Reservoir - Lat: S 34.48172, Long: E 135.85567 (WP 1105). Centre of spillway wall - Lat: S 34.48239, Long: E 135.85544 (WP 1106). Northwest corner of Value house - Lat: S 34.48631, Long: E 135.85318 (WP 1107). Centre of outlet of tunnel below wall - Lat: S 34.48728, Long: E 135.85231 (WP 1109). South corner of Pillawarta Creek weir - Lat: S 34.42274, Long: E 135.87883 (WP 1110). North end of Pillawarta Creek weir - Lat: S 34.42214, Long: E 135.87883 (WP 1111). South end of Tod weir - Lat: S 34.42145, Long: E 135.85764 (WP 1112). Centre of start of channel at Tod Weir - Lat: S 34.42141, Long: E 135.85757 (WP 1113).

Primary Images 14213/01-48 inclusive Other Images 14213/49-80 inclusive

Monday, 18 April 2011 SPA Code No: 08524_ 214 Tod Reservoir Component 1 of 1 14213

Construction Roof: N/A Stormwater: N/A Chimney: N/A Walls: Earth embankment wall of Reservoir with puddled clay core and north and south sides battered up to a roadway across the top. Battered faces lined with dry laid quarried stone. Concrete vaulted tunnel through wall for outlet pipe on south side of wall at east end with steeply battered concrete channel extending southward around pipeline. Doors: N/A Windows: N/A Timberwork: N/A Metalwork: Regularly spaced galvanised pipe posts forming low barrier to each side of roadway across top of Reservoir wall with eyelets for horizontal wire rope. Galvanised grille at entry to tunnel and pipe handrail around top of tunnel opening. Paving: Concrete kerb on north side of roadway to top of Reservoir wall. Road metal to roadway. Services: Large diameter steel pipe from outlet valve/s in Reservoir extending south to Pumping Station. Painting: N/A Floor: N/A Ceiling: N/A Fittings: N/A

Condition Assessment (1-5) Report

Roof: N/A N/A Stormwater: N/A N/A Chimney: N/A N/A

Walls: 4 Good. Water seepage through a number of the rectangular holes in the east concrete panel of the channel adjacent the tunnel. Cracks to some concrete panels to the channel for the pipeline. Minor weed growth amongst the stone lining of the wall, particularly on north side.

Doors: N/A N/A

Windows: N/A N/A

Timberwork: N/A N/A Metalwork: 4 Good. Paving: 4 Good.

Services: 4 Good.

Painting: N/A N/A

Floor: N/A N/A Ceiling: N/A N/A

Fittings: N/A N/A

Other Comments Heritage Survey and Listing does not clarify what is actually listed, Planning SA implies only dam wall is included. The Reservoir is reliant on diversion from the adjacent watercourses but this section is not listed. Suggest further investigation be carried out to define what is listed.

Monday, 18 April 2011 SPA Code No: 08524_ 214 14213

Photographs

Tod Reservoir 14213 01 - Reservoir - looking east along south side of Reservoir wall from west

14213 02 - Reservoir - north side of wall looking east from west side 14213 03 - Reservoir - looking east along north side with Valve House in background

14213 04 - Reservoir - looking west along north side of Reservoir wall with detail of stone facing 14213 05 - Reservoir - looking west along top of wall from east end

14213 06 - Reservoir - north side of wall from northeast below Valve House 14213 07 - Reservoir - looking northeast from top of Reservoir wall towards Valve House

14213 08 - Reservoir - looking south along pipeline towards pumping station from top of Reservoir wall 14213 09 - Reservoir - south end of tunnel through Reservoir wall from west side

14213 10 - Reservoir - cracked concrete panels to sides of channel for pipeline south of Reservoir wall 14213 11 - Reservoir - looking along pipeline towards tunnel in south side of Reservoir wall

14213 12 - Reservoir - looking south along pipeline towards Pumping Station 14213 13 - Valve House - from east with Reservoir wall on left

14213 14 - Valve House - from southeast 14213 15 - Valve House - from northeast with gauge boards on right

14213 16 - Valve House - from west with operating rods on right 14213 17 - Valve House - from west looking along valve control rods

14213 18 - Valve House - gauge boards west of building 14213 19 - Valve House - detail of gauge board

14213 20 - Spillway - from south side looking northwest 14213 21 - Spillway - looking north along concrete wall with pipeline

14213 22 - Spillway - concrete wall looking southwest with Reservoir wall in background 14213 23 - Memorial - west side of Reservoir wall

14213 24 - Keeper's Cottage - from southeast with Reservoir wall in background on right 14213 25 - Pumping Station - from southeast with Reservoir wall in background

14213 26 - Pumping Station - from northwest 14213 27 - Channel - entry point to Reservoir looking southwest with Reservoir wall in background

14213 28 - Channel - entry into Reservoir looking east 14213 29 - Channel - looking east along southern end before entering Reservoir

14213 30 - Channel - looking north near south end 14213 31 - Channel - north entry to tunnel below Growden Road

14213 32 - Channel - dam along length of channel north of Growden Road looking north 14213 33 - Channel - looking southeast along main channel with outlet from Pillawarta channel on left

14213 34 - Channel - looking northeast along underground section of Pillawarta channel below Tod River 14213 35 - Channel - looking north from start of tunnel of Pilawarta Creek channel under Tod River

14213 36 - Channel - looking southwest along Pillawarta channel from gates at Head Works 14213 37 - Channel - looking northeast along main channel from gates at Tod Head Works

14213 38 - Pillawarta Head Works - looking north along south side with channel in foreground 14213 39 - Pillawarta Head Works - looking north along east side

14213 40 - Pillawarta Head Works - channel gate from east 14213 41 - Pillawarta Head Works - looking south along west side of weir

14213 42 - Pillawarta Head Works - looking south along weir from north end 14213 43 - Tod Head Works - looking northwest along concrete weir with channel and gates in foreground

14213 44 - Tod Head Works - looking southwest along channel with weir and gates in background 14213 45 - Tod Head Works - gates to channel from northeast

14213 46 - Tod Head Works - looking northeast along channel above gates 14213 47 - Tod Head Works - looking northwest along northeast side of weir

14213 48 - Tod Head Works - looking northwest along top of weir 14213

Certificate of Title

Tod Reservoir CT 5841/603 REGISTER SEARCH OF CERTIFICATE OF TITLE * VOLUME 5841 FOLIO 603 *

COST : $18.00 (GST exempt ) PARENT TITLE : CT 97 /97 REGION : EMAIL AUTHORITY : CONVERTED TITLE AGENT : PSBM BOX NO : 000 DATE OF ISSUE : 02/03/2001 SEARCHED ON : 01/02/2010 AT : 10:19:36 EDITION : 1 CLIENT REF DTEI-ASSET SURVEY TG

REGISTERED PROPRIETOR IN FEE SIMPLE ------SOUTH AUSTRALIAN WATER CORPORATION OF ADELAIDE SA 5000

DESCRIPTION OF LAND ------SECTION 306 HUNDRED OF LOUTH IN THE AREA NAMED WHITES FLAT

EASEMENTS ------NIL

SCHEDULE OF ENDORSEMENTS ------NIL

NOTATIONS ------DOCUMENTS AFFECTING THIS TITLE ------NIL

REGISTRAR-GENERAL'S NOTES ------CONVERTED TITLE-WITH NEXT DEALING LODGE CT 97/97 AMENDMENT TO DIAGRAM VIDE 3/2009 ON S.A. HERITAGE REGISTER VIDE GAZ 04/03/1993

END OF TEXT.

Page 1 of 2 5841 603 01/02/2010 10:19:36

Page 2 of 2 14213

Statement of Significance

Tod Reservoir

No statement exists Location – Planning SA Website 14213

Other South Australian Heritage Register File Listing Information

Tod Reservoir

Heritage Database Map Location – Planning SA Website

Heritage Survey Item Identification Sheet, Danvers Architects (1985) Location – Department of Environment and Natural Resources, Heritage Branch Research Envelope 14213R Heritage

Heritage Map

Produced by Heritage (Planning SA) Projection Lamberts Conformal Conic (LCC) Datum Geodetic Datum of Australia 1994 Compiled 27 July 2010

Your map notes Tod Reservoir

© Copyright Government of South Australia 2010. All Rights Reserved. All works and information displayed are subject to Copyright. For the reproduction or publication beyond that permitted by the Copyright Act 1968 (Cwlth) written permission must be sought from the Department. Although every effort has been made to ensure the accuracy of the information displayed, the Department, its agents, officers and employees make no representations, either express or implied, that the information displayed is accurate or fit for any purpose and expressly disclaims all liability for loss or damage arising from reliance upon the information displayed.

Minor Towns State Borders - generalised State Border

Coastline; Island; Lake; River Murray

State Borders Coastline; Island; Lake; River Murray

State Border

Water Pipelines Roads - Major Roads - all Highway (divided)

Busway

Lane, ROW, Alley

Sealed

Sealed within Builtup Area

Under Construction

Unsealed

Unsealed within Builtup Area

Vehicular Track

NPWSA Reserves Conservation Parks

Conservation Reserves

Game Reserves

National Parks

Recreation Parks

Regional Reserves 0 720 Wilderness Protection Areas Metres Sea Mask - generalized

Compiled:Sea Mask13-Jan-2016 - detailed Generated at: http://maps.env.sa.gov.au Datum: Geocentric Datum of Australia, 1994 Projection: Lambert Conformal Conic

Copyright © Department of Environment, Water and Natural Resources 2016. All Rights Reserved. All works and information displayed are subject to Copyright. For the reproduction or publication beyond that permitted by the Copyright Act 1968 (Cwlth) written permission must be sought from the Department. Although every effort has been made to ensure the accuracy of the information displayed, the Department, its agents, officers and employees make no representations, either express or implied, that the information displayed is accurate or fit for any purpose and expressly disclaims all liability for loss or damage arising from reliance upon the information displayed.

Map data is compiled from a variety of sources and hence its accuracy is variable. SOUTH AUSTRALIAN WATER CORPORATION

GPO Box 1751 Adelaide SA 5001

Telephone: 1300 650 950 Facsimile: + 61 8 7003 3329

AquaMap Print AquaMap Comment

Scale 1: 1,676 (@A3)

CP Test Points CP Transformer Rectifiers CP Insulated Joints CP Anodes CP Anode Beds CP Anode Bed Outlines CP Anode Cables CP Cathode Cables CP Electricity Supply Cables CP Test Points (Decom.) CP Transformer Rectifiers (Decom.) CP Insulated Joints (Decom.) CP Anodes (Decom.) CP Anode Beds (Decom.) CP Anode Bed Outlines (Decom.) CP Anode Cables (Decom.) CP Cathode Cables (Decom.) CP Electricity Supply Cables (Decom.) SA Water Cables Water Main Labels Water Mains Potable System

Non-Potable System

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This advicePotability and/or informationNot Allocated is given for your private use only. The accuracy ofPrivate the advice Ownership and information is notWater guaranteed Network and no Links responsibility is accepted by the Crown or its officersWater for any Connections loss or damage caused by reliance upon this advice and/or informationOther as a result of any error, omission,Logical misdirection or misstatement therein whether caused by negligenceWater Hydrants or otherwise. Water Pillar Hydrants Water Valves Other

CopyrightNot locked SA Water 2013

Report Generated:Locked13/1/2016 8:37 AM Water Attachments Template Design: GIS Management. Last updated 22 09 2003 Reference: pr_a3l_standard_v3 Water Access Openings DFN336 [http://dataviewer.sawater.sa.gov.au:8920/dvdocument/Cache/user/1b0w3iy03kjc2k1fmt9pt18dum7t/DFN336.TIF] Page 1 of 1 Ref: SH/14213D STATE HERITAGE UNIT Conservation and Land Date: 29 February 2016 Management Branch Strategy and Advice Ms Sara Zuidland Directorate Secretary First Floor Development Assessment Commission 1 Richmond Rd Keswick SA 5035 GPO Box 1815 GPO Box 1047 Adelaide 5001 Adelaide SA 5001 Australia Attention: Yasmine Alliu DX138 Ph: +61 8 8124 4960 Fax: +61 8 8124 4980 www.environment.sa.gov.au Dear Ms Alliu

DESCRIPTION: TOD RESERVOIR - TOD RIVER DAM SAFETY UPGRADE - PHASED STANDARDS BASED UPGRADE WITH LOWERED FULL SUPPLY LEVEL AND DEMOLITION OF KNOT’S HILL CONCRETE TANK - WHITE FLAT - KOPPIO ROAD, WHITE FLAT

Application number: 923/V001/15 Referral received: 19/01/2016 State heritage place: Tod Reservoir, Off White Flat - Koppio Road WHITE FLAT

The above application has been referred to the Minister for Sustainability, Environment and Conservation in accordance with Section 49/49A of the Development Act 1993 as development that directly affects a State heritage place or, in the opinion of the relevant authority, materially affects the context within which a State heritage place is situated.

The proposed development is considered to be acceptable in relation to the above State heritage place for the following reasons.  The proposed works benefit the State Heritage place by facilitating its ongoing maintenance, utility and protection. Proposals were discussed with State Heritage Unit architects prior to lodgement and advice given has been reflected in the documentation and Planning Report accompanying the application.  Proposed breaches to the concrete Tod Intake Channel will allow its retention within the new water management arrangement, and permit necessary occasional flushing of the channels and management of water quality in the Reservoir.  The badly deteriorated large concrete water tank at Knot’s Hill is not a significant element of the heritage place, and its demolition will have no adverse impact on the place’s heritage values.

General notes 1. Any changes to the proposal for which planning consent is sought or granted may give rise to heritage impacts requiring further consultation with the Department of Environment, Water and Natural Resources, or an additional referral to the Minister for Sustainability, Environment and Conservation. Such changes would include for example (a) an application to vary the planning consent, or (b) Building Rules documentation that incorporates differences from the proposal as documented in the planning application. 2. In accordance with Regulation 43 of the Development Regulations 2008, please send the Department of Environment, Water and Natural Resources a copy of the Decision Notification. 2

3. The Commission is requested to inform the applicant of the following requirements of the Heritage Places Act 1993. (a) If an archaeological artefact believed to be of heritage significance is encountered during excavation works, disturbance in the vicinity shall cease and the SA Heritage Council shall be notified. (b) Where it is known in advance (or there is reasonable cause to suspect) that significant archaeological artefacts may be encountered, a permit is required prior to commencing excavation works. For further information, contact the Department of Environment, Water and Natural Resources. 4. The Commission is requested to inform the applicant of the following requirements of the Aboriginal Heritage Act 1988. (a) If Aboriginal sites, objects or remains are discovered during excavation works, the Aboriginal Heritage Branch of the Aboriginal Affairs and Reconciliation Division of the Department of the Premier and Cabinet (as delegate of the Minister) should be notified under Section 20 of the Aboriginal Heritage Act 1988.

For any enquiries in relation to this application I can be contacted by telephone on 8124 4922 or e-mail [email protected].

Yours sincerely,

Margaret Heathcote Senior Conservation Architect M20944 Department of Environment, Water and Natural Resources as delegate of the MINISTER FOR SUSTAINABILITY, ENVIRONMENT AND CONSERVATION

N06 11 004

PO Box 22 Port Lincoln SA 5606 th 16 February 2016 86 Tasman Terrace Port Lincoln SA 5606

Tel 08 8688 3111

Attention: Yasmine Alliu www.epnrm.sa.gov.au

Development Assessment Commission GPO Box 1815 Adelaide SA 5001

Dear Ms Yasmine Alliu,

RE: Development Application – Tod River Dam Safety Upgrade (ref: 923/V001/15)

Thank you for referring Development Application 923/V001/15 dated 22nd January 2016. Staff from the Port Lincoln office of the Department of Environment, Water and Natural Resources (DEWNR) have reviewed the Development Application, and are overall supportive of the proposal. There are however a several matters that require attention before the application is assessed for approval, which are outlined below.

Considerations for Water Affecting Activity permits

The Development Application has been referred under Section 49 of the Development Act 1993 as the proposal is to modify a State heritage place - the Tod Reservoir, which constituents as development as per the Development Act 1993. The Development Application also includes proposals to modify non-heritage infrastructure, which are not classed as development under the Development Act 1993. Non-heritage infrastructure includes:

 Causeways located at Reservoir Drive, MacDonald Road and Gawler Ponds Road;

 Pillaworta Weir; and

 Breach no 1 and no 4 (e.g. diversion structures).

The proposed modifications to the non-heritage infrastructure do however constitute as Water Affecting Activities (WAA) under the Natural Resources Management Act 2004. SA Water could however be exempt from requiring WAA permits due to Section 129(1)(e) of the Natural Resources Management Act 2004, which exempts authorised development from requiring a WAA permit. There are however implications of this clause as it can result in non- satisfactory catchment outcomes including construction of substandard infrastructure, which may later result in compliance issues. This is a particular concern of DEWNR as there is some

DEWNR’s comments on Development Application 923/v001/15 Page | 1 known fish passage issues with the non-heritage infrastructure, and is likely to be more appropriately assessed by local DEWNR staff with knowledge of the required functionality of the concerned infrastructure. Consequently it is suggested that the Development Assessment Commission (DAC) utilise Section 49(13)(a) of the Development Act 1993, and only consider State Heritage listed infrastructure for approval. DEWNR staff have discussed this matter with SA Water representatives, and are currently working towards a mutually beneficial outcome.

Alternatively if the DAC wish to assess the entire Development Application, it is recommended that the DAC:

 Follow the principles outlined the Water Affecting Activities section of Eyre Peninsula NRM plan to guide the assessment on non-heritage infrastructure; and

 Liaise with WAA officer - Dave Cunningham about the required functionality of non- heritage infrastructure. Dave’s contact details include 8688 3226 or [email protected]

Water quality risks from construction activities within the Tod Reservoir

Reducing Tod Reservoir’s storage capacity and modifying the overflow infrastructure will lead to environmental benefits in the longer term. There are however risks of degrading water quality and impacting downstream ecosystems in the short-term due to the proposed dredging and earthworks which has potential to mobilize pollutants within the dam’s sediments. These pollutants are likely to have accumulated within the Reservoir due to inflows from the surrounding agricultural catchment which is intensively cropped and grazed. The preliminary Project Environmental Management Plan (PEMP) has identified some common water quality parameters to monitor (page 67), however it does not propose to monitor any nutrients, pesticides, herbicides, fungicides or heavy metals. These pollutants are likely to be present in some composition and concentration, and it would be beneficial to confirm background levels prior to construction. Subsequently it is suggested that the proposed risk assessment of contamination (page 73) include field investigations to inform the risk assessment. It is also suggested that the preliminary PEMP (page 67) be updated to include a greater range of water quality parameters to monitor during construction activities. To advance the aforementioned suggestions, it is recommended that SA Water liaise with the Environmental Protection Authority to confirm their requirements for the proposed works and compliance with Environment Protection (Water Quality) Policy 2003.

Pest plant inspection of quarry material – incorrect responsibility

The preliminary PEMP (page 69) states imported quarry materials are to be “sourced from a licenced quarry (a quarry site inspected by the local NRM Board confirming appropriate weed management strategy is in place that minimises the risk of weed contamination of the material taken”. This is an incorrect assumption and not the responsibility of the NRM Board, rather it is the responsibility of the quarry owner/ operator to ensure their materials do not contain pest plants as per Section 175(3) of the Natural Resources Management Act 2004.

DEWNR’s comments on Development Application 923/v001/15 Page | 2

Consequently the preliminary PEMP needs to be amended to reflect the appropriate responsibility to control the movement of pest plants.

Construction schedule – potential inappropriate timing

Section 5.2 (page 32) outlined in the construction schedule is suggested to start in July 2016, which is generally the wettest period of the year. The proposed schedule appears to contravene the preliminary PEMP (page 67) which states “schedule works that will occur in water courses and drainage lines for periods of favourable weather.” While it is unclear what activities are planned, the proposed schedule could lead to increased erosion risks and water quality impacts if construction occurs in water courses and/or the Reservoir during the wetter months. Consequently it is recommended that the construction activities on a water course and within the Reservoir be scheduled to commence by the earliest September 2016. Release of water from the Reservoir could however start in July provided it is in accordance with SA Water’s Best Practice Operating Procedures agreement with the Eyre Peninsula Natural Resources Management Board.

DEWNR would be supportive of discussing the Development Application with DAC and/or SA Water. If you have queries regarding the aforementioned comments please contact Planning Officer – Liam Sibly on 8688 3230 or email him at [email protected].

Regards

Jonathan Clark Regional Director – Eyre Peninsula Department of Environment, Water and Natural Resources

DEWNR’s comments on Development Application 923/v001/15 Page | 3

IS Method

Tod River Dam Safety Upgrade

Response to Submissions Received on Development ApplicationIS Method

Version: 0.02 Date: 23/05/16 Status: Draft

© 2015 SA Water Corporation. All rights reserved. This document may contain confidential information of SA Water Corporation. Disclosure or dissemination to unauthorised individuals is strictly prohibited. Uncontrolled when printed or downloaded.

Response Document – Tod River Dam Safety Upgrade DA 923/V001/15 SA Water

Document Controls

Version History

Version Date Author Comments 0.01 23/05/16 Charmaine Goodes First draft 0.02 27/05/16 Charmaine Goodes Final incorporating comments MS and TH

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Reviewers

Role Name Version Review Date Senior Project Manager Matt Simone 0.01 27/05/16 Senior Manager Stakeholder Engagement Matt Bonnett Manager Environment and Heritage Services Tara Hage 0.01 27/05/16

Document Location

URL: http://projectserver.sawater.sa.gov.au/pws1/C5161%20Tod%20River%20Dam%20Safety%20Investig ation/Deliver/Environmental%20Management/Response%20Report%20- %20Tod%20River%20Dam%20Safety%20Upgrade.docx

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Contents

1 Introduction ...... 5 1.1 Purpose ...... 5

2 Response to Submissions ...... 6 2.1 Project Need ...... 6 2.2 Consideration of Alternative Options ...... 6 2.3 Loss of Infrastructure Capacity/ ‘Decommissioning’ the Reservoir ...... 7 2.3.1 Water Security for Eyre Peninsula ...... 8 2.4 Recreational Opportunity/Access ...... 9 2.5 Potential Downstream Impacts ...... 10 2.5.1 Downstream Infrastructure ...... 10 2.5.2 Downstream Environment ...... 12 2.6 Considerations for Water Affecting Activity permits ...... 13 2.7 Water Quality Risks from Construction Activities within the Tod Reservoir ...... 13 2.8 Pest Plant Inspection of Quarry Material – incorrect responsibility ...... 14 2.9 Construction Schedule – Potential Inappropriate Timing ...... 14 2.10 State Heritage Listing ...... 14 2.11 Stakeholder Engagement ...... 15

3 Conclusion ...... 16

Appendix A Summary of Respondents and Issues Raised ...... 17

Appendix B Project Fact Sheet ...... 18

Appendix C DC Tumby Bay Press Release ...... 20

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1 Introduction

SA Water submitted a Development Application in December 2015 for the Tod River Dam Safety Upgrade. SA Water is seeking development authorisation under Section 49 (Crown Development) of the Development Act, 1993, as the Tod Reservoir is State heritage listed on the South Australian Heritage Register.

1.1 Purpose

This document provides further information in response to matters raised during the development assessment process. It seeks to address the issues and concerns raised in submissions received.

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2 Response to Submissions

The section below consolidates all the issues raised in the submissions received on the Tod River Dam Safety Upgrade Development Application including from District Council of Tumby Bay, District Council of Lower Eyre Peninsula, Department for Environment, Water and Natural Resources State Heritage Unit and Natural Resources Eyre Peninsula.

2.1 Project Need

SA Water has an obligation to manage dam safety risks and have therefore made a commitment to comply with Australian National Committee on Large Dams Incorporated (ANCOLD) Guidelines. ANCOLD is a non- government association established to provide guidance on dam engineering, management and associated issues. The ANCOLD guidelines on Dam Safety Management (2003) set out requirements which represent best practice from both an Australian and international perspective for the safe management of dam infrastructure.

To meet SA Water’s commitment to comply the ANCOLD guidelines it is necessary to reduce the dams’ probability of failure through increasing its flood capacity, reducing the likelihood of a major leak developing and upgrading the intake to the outlet. If this is not undertaken, there is a risk that the dam may fail during a flooding or seismic event, due to overtopping of the dam or internal embankment erosion or other latent defect. Analysis of this risk has shown if the dam was to fail, this could lead to a potential loss of life, financial losses and significant economic losses to society associated with the loss of water supplies to the East Coast and West Coast through the loss of critical downstream infrastructure including water supply pipelines and the Tod pump station.

2.2 Consideration of Alternative Options

Since 2001 a number of studies and investigations have been completed to determine the preferred option to meet the ANCOLD guidelines on Dam Safety Management (2003) for the Tod River Dam. These studies have addressed various aspects to satisfy the assessment criteria listed in the ANCOLD guidelines and have included Dam Stability Assessments, Detailed Risk Failure Modelling, Geotechnical Investigations, Dam Break Analysis, Ecological Consequence Assessment, Piping Assessment, Detailed Dam Risk Assessments and Risk Reduction Evaluations.

The outcomes of these studies have informed the development of a number of options. These options have been assessed using a multi-criteria analysis approach that considered the whole of life cost, environmental and social factors. Throughout the option assessment process relevant technical experts across a range of disciplines, including industry and SA Water’s Dam Safety Engineers, have also been consulted and provided expert review on the best outcome to meet the technical and broader environmental and social outcomes. The options assessed include:

Option 1 - ‘Do nothing’ Base Case

Option 2 - Full decommissioning – this option would include complete removal of the dam embankment, emptying the dam and exposure of around 100ha of backwater. Also much greater work would be required downstream at causeways etc. to manage additional flow events.

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Option 3 - Partial decommissioning – lowering the full supply level of the reservoir, dam effectively becomes a flood detention basin. It also includes strengthening the dam embankment by extending the rock fill berm downstream.

Option 4 - Standards based upgrade – upgrading the dam to meet the full requirements of the ANCOLD guidelines including lowering the full supply level, strengthening the dam embankment and widening the spillway.

Option 5 (Preferred Option) - Partial standards based upgrade with lowered Full Supply Level

Based on the outcomes of a rigorous assessment process, as described above, the preferred option selected to progress to detailed design was Option 5, the Partial Dam Safety Standards-based Upgrade with Lowered Full Supply Level. This option best addresses the dam safety risk in an economic way, whilst recognising the other values of the Reservoir; including its heritage status and ensuring it can continue to act as a contingency water source.

The option does include reducing the current Full Supply Level, as hydrological modelling work, undertaken by SA Water’s Consultants (GHD) to inform the option assessment process, has identified this is required to lower the frequency of dam crest flooding and annual probability of failure. The specific earthworks to the dam wall proposed under the preferred option will address the potential piping failure which also lowers the risk of dam failure. The scope of work listed in our Development Application in its entirety contributes to achieving a reduced dam safety risk.

The option recommendation sign off process was in accordance with SA Water’s Policies and Procedures relating to Project Development Analysis which included endorsement from SA Water’s Project Review Committee and approved by the SA Water Board. The options assessment and endorsement process also satisfies the Essential Services Commission of South Australia (ESCOSA) compliance guidelines, as an independent regulatory body.

2.3 Loss of Infrastructure Capacity/ ‘Decommissioning’ the Reservoir

The Tod Reservoir was taken off-line in 2002 due to high levels of salinity that made the water unsuitable for the drinking water supply. Currently only flows from the Toolillie catchment enter the reservoir, as the Pillaworta Creek and Tod River flows are not being diverted through the intake channels, the valves at each intake weir are fully shut (locked). Also any catchment flows from the 11 tributaries that flow into the channel are bypassed back into the Tod River at a scour point just above the inlet into the Reservoir, as such minimal water enters the Reservoir from the intake channel. This operating arrangement has been in place since 2002 and was implemented to manage salinity in the reservoir, as the elevated salinity is largely derived from the Pillaworta Creek and Tod River catchments.

Under this operating regime, the Reservoir has not reached its original full constructed capacity of 11 300 mega litres (ML) (118.73m AHD) for many years i.e. 114m AHD in 2005 dropping to 109m AHD in 2013 and 105m AHD as at December 2015, 103.9m AHD as at April 2016). Following the proposed works the new Full Supply Level will be 918 ML (105.3m AHD).

As identified earlier, the Tod River Dam Safety Upgrade is essential to ensure the ongoing safety of the dam and to ensure the dam satisfies the ANCOLD guidelines. The project is not related to the Lower Eyre Peninsula water network or supply. Notwithstanding this, the safety works will not preclude the reservoir being used in the future as a water supply for commercial or other uses if there was a need identified. It should however be noted, that significant financial investment would be required to bring the Reservoir back into the water supply network.

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SA Water is actively exploring beneficial uses for its offline reservoirs that could generate revenue and support economic development in the state. As outlined in the Development Application, a new intake will be installed on the outlet works to provide operational flexibility and enable supply to potential future customer(s). In District Council of Tumby Bay’s letter to the Development Assessment Commission they query the availability of water within the reservoir to supply water for future uses such as resources projects. A press release was issued on 7 April 2016 by the Council stating they had signed a Memorandum of Understanding with Lincoln Minerals and that a proposed pipeline from Tod Reservoir would supply water to the mine. Refer to Appendix C. SA Water confirms it has been in discussions with Lincoln Minerals who requires approximately 250ML/annum of water from Tod Reservoir. SA Water has conducted hydrological modelling which demonstrates we are able to supply these volumes post upgrade works.

In addition, The South Australian Government has committed to investigating the provision of public access to five offline SA Water reservoirs for recreational fishing. The Tod River Reservoir is one of the offline reservoirs identified for investigation the dam safety project will not impact this opportunity. SA Water is also supporting the Port Lincoln High School in its use of the Tod Reservoir to support a number of areas of the school curriculum, including its specialist Aquaculture program. The outcomes of the school’s program will inform investigations into the potential use of the reservoir for recreational fishing through providing an improved understanding of the existing ecology within the reservoir and the potential for stocking it with recreationally appealing fish species.

As outlined in previous sections, the selection of the preferred option was subject to a rigorous assessment processes which included consideration of the broader values of the Reservoir to ensure the best solution in terms of dam safety, cost, environment and social factors is developed and implemented.

2.3.1 Water Security for Eyre Peninsula

SA Water attended formal Council Meetings at District Council of Tumby Bay on 11 May 2016 and District Council of Lower Eyre Peninsula on 20 May 2016 and a key concern was water security for Eyre Peninsula. This Section summaries SA Water’s Long Term Water Supply Planning for Eyre Peninsula.

A Long Term Plan for Water Supply in Eyre Region was developed in 2008. The framework of the plan is to ensure Eyre Peninsula has a secure water supply for the next 25 years.

The plan sets an adaptive management tool to ensure SA Water is able to respond to changes in climate conditions, resource allocations and changes in demand. Under the plan SA Water undertakes annual reviews of water security to the region, which considers:  the annual review of demand and supply statement (DSS) undertaken by the Department of Environment, Water and Natural Resources (DEWNR)  resource allocation by DEWNR  Review infrastructure recommendations and timing for implementation

Also a range of triggers are monitored based on information provided by key stakeholders, including Councils, Regional Development Australia, DEWNR and the EPNRMB. Triggers include changes in:  Population growth predictions  Rural and township customer water use  Water allocations  Resilience to climate variability  Uncertainty of climate change

In response to the updated demand/supply statement prepared by DEWNR in June 2014, SA Water reviewed demand data overall and the trend has continued to decline i.e. 08/09 - 8,150 ML, 12/13 – 7290 ML. Based on the annual review available water resources are basically seen to be stable and continue to

Version 0.01 dd/mm/yy Page 8 of 20 For Official Use Only Uncontrolled when printed or downloaded Response Document – Tod River Dam Safety Upgrade DA 923/V001/15 SA Water exceed demand. Refer to Figure 1. The overall forecast for Eyre Peninsula suggests an additional source of water is not required until year 2024/25 under a worse-case scenario.

As discussed in Section 2.3 the safety works will not preclude the reservoir being used in the future as a water supply for commercial or other uses if there was a need identified.

Figure 1. SA Water Supply - Eyre NRM Region June 2014

2.4 Recreational Opportunity/Access

SA Water is actively exploring beneficial uses for its offline reservoirs that could generate revenue and support economic development in the state. The South Australian Government has committed to investigating the provision of public access to five offline SA Water reservoirs for recreational fishing. The Tod River Reservoir is one of the offline reservoirs identified for investigation.

The Port Lincoln High School is using the Tod River reservoir to support a number of areas of the school curriculum, including its specialist Aquaculture program.

The outcomes of the school’s program will support the investigations into the potential use of the reservoir for recreational fishing through providing an improved understanding of the existing ecology within the reservoir and the potential for stocking it with recreationally appealing fish species.

SA Water will work with the school during the construction works to assist them to modify their program to account for potential site restrictions and minimise impacts to their investigations.

SA Water note that DC Lower Eyre Peninsula in their submission recognise they do not have capacity to take on management of such an area. Following completion of the upgrade project SA Water will continue to have discussions with Local Government and other interested parties on how management of the Tod Reservoir for recreational purposes can be best progressed.

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2.5 Potential Downstream Impacts

2.5.1 Downstream Infrastructure

Under the proposed operating arrangement the Toolillie catchment will be the only flow which will be captured in the Reservoir, unless periodically water is required from the Tod River (when it is of suitable quality) to manage water quality issues in the Reservoir. As stated previously, this operating approach has been occurring since 2002 with only flows from the Toolillie catchment entering the reservoir; the Pillaworta Creek and Tod River flows are not being diverted through the intake channels. The Toolillie catchment is much smaller (4,200ha) in size in comparison to the Tod (10,950ha), Pillaworta (4,360ha) and some of the Lower Tod (5960ha) catchments, which are all upstream of the reservoir and as such flows from these catchments bypass the reservoir.

A new outlet structure is proposed to be installed as part of the project; the outlet will allow the passing of flows once the Reservoir reaches its new FSL. The outlet structure pipe size is 600mm in diameter which will limit the volume of water discharged during any release. The system also includes an energy dissipater to prevent scouring and erosion of the channel which leads into the Tod River.

As part of project investigations a comparative hydrological analysis was undertaken by GHD of the expected Tod Reservoir release flows and the flows expected within Tod River (upstream of where the dam release flows enter). The analysis was used to assess the potential impacts of expected release flows downstream of the reservoir.

The first step GHD considered was investigating the actual flows in Tod River in recent years as an indicator of average expected flows; the hydrograph below shows the actual flows at in the Tod River at Gauge A5120500 between 2012 – 2015.

Excluding peak flows; GHD’s assessment for base flows using accepted industry hydrological techniques it is considered the creek base flow (post flood flows) is 0.33m3/s.

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GHD then conducted a flood frequency analysis for flood flows in the Tod River, refer to table below: Peak Flood Flow - Tod River Flow AEP (1 in X) (m3/s) 1 5 2 12 5 29 10 54 20 88 50 152 100 220 Note: The peak Flood Flows excludes outflows from the dam.

GHD also investigated the existing infrastructure to determine the existing levels of service and points at which the downstream infrastructure would be considered to ‘fail’ (eg. not be serviceable/passable). The following observations were made: 1. It is generally known in the community that the crossings at Reservoir Drive, McDonalds Drive and Gawler Ponds Road experience annual floods for relatively minor rainfall events. 2. Large amounts of sediment deposits and vegetation upstream of the causeways impact the ability of the creek to flow freely; thus creating a backwater effect for minor flows. 3. The hydraulic gradient at these locations are not favourable. 4. The existing drain lines at Reservoir Drive are in poor condition with large amounts of sediment deposit impacting its design capacity.

The flow regime at the causeway locations for a 200mm overtopping event (accessible) shows: 1. Reservoir Drive - The current total flow for 200 mm water depth over the road is 8.3 m3/s. 2. McDonalds Drive - The current total flow for 200 mm water depth over the road is 1.5 m3/s 3. Gawler Ponds Road - The current total flow for 200 mm water depth over the road is 8.0 m3/s Comparing the overtopping flows with the peak flood flows it can be seen the infrastructure capacity currently fails for a 1 in 2 year AEP Rainfall event; McDonald Drive being the worst performer failing less than 1 in 1 year AEP. All locations pass for the estimated base flow of 0.33 m3/s.

GHD then conducted a flood frequency analysis for the outflow from the dam and as a % of total Peak Flood Flow: Peak Outflow Peak Flood Flow - Tod AEP (1 in X) % of Total peak Flow (m3/s) River Flow (m3/s) 1 0.34 5 4.5 2 1.28 12 10.7 5 1.37 29 4.7 10 1.39 54 2.6 20 1.42 88 1.6 50 1.48 152 0.97 100 1.52 220 0.69

The outcomes of this assessment, as summarised in the table above, demonstrate the additional coincidental flow from the dam compared to a flood flow is insignificant and does not adversely impact existing conditions as the durations are very small.

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GHD also investigated the overall capacity, including upgrades/modifications, at the various crossings and how this compares to the additional dam outflow plus base flow. McDonalds Drive New hydraulic Combined base Peak Outflow Base Flow capacity AEP (1 in X) flow + dam Peak Pass (Y/N) (m3/s) (m3/s) influenced by flow (m3/s) parapet wall 1 0.34 0.33 0.67 1.87 Yes 2 1.28 0.33 1.61 1.87 Yes 10 1.37 0.33 1.7 1.87 Yes 20 1.39 0.33 1.72 1.87 Yes 50 1.42 0.33 1.75 1.87 Yes 100 1.48 0.33 1.81 1.87 Yes Note: Reservoir Drive and Gawler ponds roads have been excluded as the inherent capacity of 8.3m3/s and 8.0m3/s far exceed the Dam Peak Outflow + base flow test.

The above table demonstrates the following: 1. Without the parapet wall the existing capacity of 1.5m3/s would not cope with the combined base flow + dam peak flow for any AEP. 2. The addition of a parapet wall creates greater hydraulic capacity of 1.87m3/s which comfortably services the combined base flow + dam peak flow for any AEP.

The modifications to the causeways will accommodate the additional discharge from the Reservoir under the new outlet arrangement, to provide a consistent level of service to road users. The causeways are local roads and therefore assets managed by the District Council of Lower Eyre Peninsula, as such SA Water is not responsible for current condition or Levels of Service and understand the council is aware of the issues identified with the levels of service, as raised on the previous page.

2.5.2 Downstream Environment

An Ecological Consequences Assessment was undertaken by GHD which assessed the risk posed by the current Tod River Dam, in the event of dam failure to environmental values downstream. The report documented the ecological values within areas potentially affected by a dam failure and the potential consequences posed to those ecological values identified. The results of the assessment were that failure of the dam posed a high consequence to the environmental values of the downstream Tod River Wetland and Estuary System through potential salinisation, flooding and sedimentation. The outcomes of this report were used by SA Water as part of the risk assessment and option development process for the project.

An Environmental Impact Assessment has been undertaken for the project which identified potential environmental issues and impacts from the project and recommends mitigation and management measured to be implemented to address identified impacts. As part of the environmental impact assessment process potential downstream impacts have been assessed. The overall outcome is that post the upgrade, flows to be released from the reservoir offer benefits to the downstream environment. The potential environmental benefits to the downstream environment include that for rain event that occurs in the summer (or during the very low to cease to flow condition) the possible Tod River Dam flow releases could increase the available fish passage flow, ‘top-up’ permanent pool habitats downstream, provide permanent pool connectivity, re-set habitats including increased habitat and stimulating growth of vegetation and fauna.

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2.6 Considerations for Water Affecting Activity permits

SA Water has included all components of the dam safety upgrade works in the development application and requests that these are considered as part of the application assessment process. SA Water has had numerous correspondence and meetings with officers from Eyre Peninsula Natural Resources (EPNR) prior to and since the development application was submitted. The latest correspondence received indicates that EPNR has no issues with the causeway modifications at Reservoir Drive and Gawler Ponds Road. They do support the installation of the downstream fish riffle habitat at McDonald Road causeway, which is at the EPNR request and not directly related to dam safety. SA Water is including this as part of the project for environmental benefits for assisting with fish migration in this reach of the Tod River.

EPNR has indicated in their submission that the non-heritage infrastructure includes the causeways, Pillaworta weir and Channel Breach no. 1 and 4. This is however incorrect as the Pillaworta weir and intake channel are part of the State Heritage listing and are considered to be Contributory Heritage Items. Although not mentioned in the EPNR submission, to note the syphon scour location is also considered a Contributory Heritage Item. This is all reference in the Swanbury Penglase (2010) Tod Reservoir – DTEI Building Management Project Services Heritage Asset Survey.

2.7 Water Quality Risks from Construction Activities within the Tod Reservoir

For the project the Construction Contractor will be required to have a current Dredging and Earthworks Drainage Licence from the EPA. The Contractor will also prepare and implement a Soil Erosion and Drainage Management Plan (SEDMP) as part of their Construction Environmental Management Plan. The SEDMP will detail the sediment and erosion controls to be implemented to ensure sediment-laden runoff is prevented from leaving the construction site and downstream water quality protected.

The Contractor will also be required to prepare and implement a Water Quality Monitoring Program (WQMP) to monitor the effectiveness of environmental controls and to determine if site management practices and mitigation measures are successful in protecting waterways and drainage lines from environmental impacts associated with the works, and identify if further controls are required.

To undertake works to the dam outlet structure located in the Reservoir, dredging of the sediments around the immediate location of the outlet structure is required. Sediment samples were collected from the bottom of the Reservoir near the outlet structure in December 2015 for testing. These samples were collected as a pilot to assess whether there were any concerns about the sediments with respect to chemical contamination. The sediment samples were analysed for a broad suite of contaminants of potential concern. The results show that all of the contaminants analysed were below the recommended sediment quality guidelines as described in the Australian and New Zealand Guidelines for Fresh and Marine Water Quality. In addition, the contractor will be required to ensure all dredged sediments will be appropriately disposed of within the SA Water owned land and in accordance with EPA requirements.

As of April 6 2016 the reservoir level is sitting at EL 103.90m AHD and the proposed new Full Supply Level is EL 105.3m AHD. Depending on the timing of construction works there may need to be some discharges from the reservoir to enable works to occur. In the event discharges are required these will be undertaken in accordance with SA Water’s Best Practice Operating Procedure (as approved by the EPA/EPNR), which includes water quality monitoring prior to any discharge and during the discharge to ensure suitable water quality.

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2.8 Pest Plant Inspection of Quarry Material – incorrect responsibility

SA Water has amended the Preliminary Environmental Management Plan to reflect the appropriate responsibility to control the movement of pest plants.

2.9 Construction Schedule – Potential Inappropriate Timing

The construction schedule provided in the Development Application is indicative only. The final construction schedule will take into account constructability risks including works in watercourses or drainage lines. SA Water believes proper management of those risks with appropriate measures does not exclude execution of works during less favourable weather.

This is a revised anticipated project schedule and is subject to obtaining relevant approvals and contractual arrangements. Note: Construction is now not anticipated to start until September 2016.

TASK TIMEFRAME Detailed Design October 2015 – March 2016 Development Approval December 2015 – June 2016 Public Works Committee July 2016 Construction Tender Period March 2016 – May 2016 Award Contract July/August 2016 Construction September 2016 – February 2017

2.10 State Heritage Listing

As detailed in SA Water’s development application the current State Heritage listing includes the dam embankment and a number of contributory heritage items. A heritage assessment report was completed by Swanbury Penglase (2010) Tod Reservoir – DTEI Building Management Project Services Heritage Asset Survey which assessed the assets on site.

SA Water has consulted with the Department for Environment, Water and Natural Resources - State Heritage Unit during preparation of the Development Application. As part of this consultation SA Water facilitated a site visit to Tod Reservoir which Senior Conservation Architect, Margaret Heathcote attended and visited all infrastructure associated with operation of the Reservoir.

In their submission to DAC regarding the Development Application, the State Heritage Unit provided advice that it considers the proposed dam safety upgrade works to benefit the Reservoir by facilitating its ongoing maintenance, utility and protection. They also consider the work to be acceptable and it will not affect the heritage character or value of the Reservoir.

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2.11 Stakeholder Engagement

SA Water is committed to ensuring high levels of stakeholder engagement in order to manage expectations, concerns and any other stakeholder issues associated with the Tod River Dam Safety Upgrade. Key stakeholders for this project were mapped as part of the preliminary planning and engagement regarding the project commenced early in order to educate stakeholders, including the community, as to the importance and necessity of this project. This included initial meetings with District Council of Lower Eyre Peninsula and District Council of Tumby Bay on Friday 20th November 2015 and meetings with adjacent and downstream landowners and Tumby Bay Residents and Rate Payers Association on 19th – 20th November 2015.

In planning for this project and as part of the development of this application, SA Water has consulted with Senior Conservation Architect, Department of Environment, Water and Natural Resources. Meetings to discuss the proposed upgrade works have also been undertaken with officers from Natural Resources Eyre Peninsula, the Environment Protection Authority, District Council of Lower Eyre Peninsula, District Council of Tumby Bay and adjacent landowners.

Since receiving the submissions on our Development Application SA Water has undertaken further consultation including:  Presenting at District Council of Tumby Bay formal Council Meeting on 10 May 2016, formally responding to their letter to DAC on 6 May 2016; and providing additional information from queries taken without notice from the presentation to council.  Presenting at District Council of Lower Eyre Peninsula formal Council meeting on 20 May 2016; and formally responding to their letter to DAC on 16 May 2016.  Meeting with Tumby Bay Residents and Rate Payers Association and adjacent landowners to the project following the formal Council meeting on 11 May 2016; and providing additional information from queries taken without notice from the meeting.  A project fact sheet on the upgrade project has also been developed for the wider community and distributed to Local Members, Council Offices and is available on SA Water’s external website https://www.sawater.com.au/current-projects/tod-river-dam-safety-upgrade Refer to Appendix B for a copy of the Fact Sheet.

Stakeholder engagement activities undertaken in the lead up to and during construction will continue to provide an avenue for two-way communication between stakeholders and the project.

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3 Conclusion

SA Water believes the information contained in this document effectively addresses questions and concerns raised by Councils and Government Agencies during the formal Development Application process. Refer to Appendix A for a Summary of Respondents and Issues Raised.

The proposed project is critical to ensure that SA Water is meeting its obligations and ensure its dam infrastructure is safe and complies with relevant guidelines. SA Water has undertaken a rigorous assessment process to identify the preferred option and considers this option best addresses the dam safety risk in an economic, environmental and socially responsible way, whilst recognising the other values of the Reservoir; including its heritage status and ensuring it can continue to act as a contingency water source.

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Appendix A Summary of Respondents and Issues Raised

Respondents and Summary of Issues Reference in Response Report District Council of Tumby Bay Project Need 2.1 Loss of infrastructure capacity 2.3 Potential downstream impacts 2.6 State heritage listing 2.10 District Council of Lower Eyre Peninsula Project Need 2.1 Potential downstream impacts (both ecological and property owners) 2.6 Reduced storage capacity of Tod Reservoir 2.3 Alternative safety upgrade proposals 2.2 Recreational Opportunity/Access 2.5 Eyre Peninsula Natural Resources Considerations for Water Affecting Activity permits 2.7 Water quality risks from construction activities within Tod reservoir 2.8 Pest plant inspection of quarry material – incorrect responsibility 2.9 Construction schedule – potential inappropriate timing 2.10 Department of Environment, Water and Natural Resources - State Heritage Unit Will not affect the heritage character or value of the Reservoir 2.11

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Appendix B Project Fact Sheet

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Appendix C DC Tumby Bay Press Release

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