1 SCAP Agenda Item 3.1.1 25 October 2018 #13167351 SA Water
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SCAP Agenda Item 3.1.1 25 October 2018 #13167351 SA Water Northern Adelaide Irrigation Scheme (NAIS) – Earth Banks Storage (EBS) Lot 115 Church Road, Korunye 312/V006/18 TABLE OF CONTENTS PAGE NO AGENDA REPORT 1-17 ATTACHMENTS 1: APPLICATION DOCUMENTS a. DEVELOPMENT APPLICATION REPORT (including 18-44 appendices): 1. Certificate of Title 45-47 2. EBS Site Plan 48 3. EBS Cross sections 49 4. Tonkin Consulting hydrological assessment of 50-57 Low risk Flood Zone 5. Construction Environmental Management Plan 58-93 6. Traffic Management Plan 94 7. FMG Waste Classification report 95-111 8. SA Water NAIS Project above ground storage 112 options Kaurna Heritage Survey 9. Aboriginal Heritage Discovery Procedure 113 10. Development Application Lodged for property 114 sub-division 11. Electricity Infrastructure Statement 115-116 2: COUNCIL COMMENTS 117-123 3: REPRESENTATION 124 4: DEVELOPMENT PLAN PROVISIONS 125-129 1 SCAP Agenda Item 3.1.1 25 October 2018 OVERVIEW Application No 312/V006/18 Unique ID/KNET ID 2018/15699/01 Applicant SA Water Proposal Construction of two 200ML lined above ground recycled water Earth Bank Storages, with a reticulated pump and ancillary infrastructure. Subject Land Porter Road, Korunye Zone/Policy Area Primary Production Zone Relevant Authority Minister for Planning Lodgement Date 16 July 2018 Council Adelaide Plains Council Development Plan Mallala Council Development Plan Consolidated 20 February 2018 Type of Development Crown application Public Notification Development exceeds $4 million – Section 49 public notification requirement Representations One (1) wishing to be heard Referral Agencies Adelaide Plains Council Adelaide & Mt Lofty Ranges NRM Board Essential Services Commission Report Author Sharon Wyatt, Principal Project Officer EXECUTIVE SUMMARY The Northern Adelaide Irrigation Scheme (NAIS) is a private/public partnership developed by PIRSA and led Northern Adelaide Plains Agribusiness Initiative which is seeking to expand the use of recycled water for horticultural irrigation in the Northern Adelaide Plains. The application is for the construction of two 200ML lined above ground recycled water earth bank storages (EBS), a reticulation pump and ancillary infrastructure to support the broader NAIS. Upon completion, NAIS will be capable of providing 12GL pa for commercial field crops and animal husbandry in the Northern Adelaide Plains region. The subject land is located approximately 5km north-west of Two Wells at the corner of Hart and Porter Roads. The site consists of predominantly farming land, has been previously cleared with minimal vegetation. The site has been chosen due to being largely outside the flood zone and proximity in the primary production zone. The proposal underwent a public notification process from 8 August 2018 to 7 September 2018 during which one (1) representation was received. The representation raised concerns relating to impacts during and post construction (dust, noise, traffic, revegetation, pest animals). The proposed development is within the Primary Production Zone which promotes the protection of primary production land from encroachment of incompatible uses, reinforced by Horticulture Policy Area 3, which encourages horticulture land pursuits. Whilst the proposed development does not fall within one of the envisaged uses for the Primary Production Zone nor the Horticulture Policy Area 3, the proposal is consistent with the policies for the Zone and Policy Area in that it will support the establishment of a proximate, year-round water supply to support productive and sustainable production. 2 SCAP Agenda Item 3.1.1 25 October 2018 Temporary impacts during the construction phase can be managed through a Construction Environmental Management Plan (CEMP). On balance, the proposal is supportable, with a recommendation to seek the Minister’s endorsement subject to appropriate conditions. ASSESSMENT REPORT 1. BACKGROUND The Northern Adelaide Plains is an important horticultural region that accounts for approximately one third of the State’s horticulture production. To facilitate the expansion of production in the region large volumes of affordable, reliable, recycled water is required. When complete, the Northern Adelaide Irrigation Scheme project will make an additional 12 GL per year of treated recycled water available to support local horticulture operations. This application follows on from a previously approved development application for a new treatment plant, pump station and balancing storage tank (DA 361/V001/18) at the SA Water Bolivar Waste Treatment facility. 2. DESCRIPTION OF PROPOSAL Application details are contained in the ATTACHMENTS. The proposal is for the construction of two 200ML lined above ground recycled water earth bank storages (EBS), a reticulation pump and ancillary infrastructure (electrical switchboard building, back-up diesel generator, access road, perimeter security fencing and possible bird net) to support the broader NAIS. Each EBS will be approximately 197.5m x 109.5m with 5m in height. The pump station will consist of eight (8) low noise canned pumps. The pumps will be located below the ground to reduce noise. The pumps will be painted in Pale Eucalypt. The pump station, associated pipework and electrical switchboard will be contained within a prefabricated building approximately 8m (wide) x 2.4m (long) x 3m (high) and will be constructed in steel (colour Pale Eucalypt) with a concrete base. A diesel generator is proposed to be installed. This will guarantee supplies during unplanned power outages. This will be located on a concrete pad with self-contained noise attenuation. The site will be accessed via a new access point and internal access road from Porter Road. The access point and road will be constructed from asphalt. It will be 5m wide with an open swing security gate located approximately 15m from Porter Road. A 2.4m high security fence will be installed around the perimeter toe of the EBS, associated infrastructure and internal emergency fire access track. The security fence is set back approximately 10m from the property boundary and will be either black or grey (to be determined). The security fence is required to ensure public safety. A boundary stock fence to 1.2m in height will be installed around the property boundary. The majority of the material used for the construction of the EBS will be sourced on site through cut and fill. No material will need to be required to be disposed off-site. Any additional material needed will be sourced from spoil created from the construction of the NAIS transfer pipeline. This will be stockpiled on site at the EBS until required. Any spoil brought to the site will be classified as “waste fill” and suitable for re-use for the construction of the EBS (as per the EPA Waste derived Fill Guidelines). 3 SCAP Agenda Item 3.1.1 25 October 2018 Exact quantities of material required are unknown at this stage. Should there still be a deficit of material required to construct the EBS, extra material will be sourced from SA Water approved Quarry material suppliers and NRM Board approved weed free. A portion of the south eastern section of the security fence will intersect with the Adelaide Plains Council flood hazard risk areas (100yr ARI flood plains). Fences within this area are listed in the Mallala Council Development Plan as being non-complying unless ‘the fencing maintains a mesh size greater than 100mm between ground level and 300mm’. To accommodate this hazard risk, SA Water will change their standard fence type, with the bottom 300mm of the proposed chain mesh fence to have a larger mesh size to ensure compliance with the Development Plan policy. SA Water has committed to develop landscaping (trees and shrubs) in a strip 5-7m wide around the perimeter of the EBS to soften the visual impact of both the EBS and the security fence, in particular for residents on Porter Road and Hart Road. Native grasses will also be seeded on the banks of the EBS to stabilise the exposed embankment. The EBS has been designed to allow for the inclusion of a bird net if required. A bird survey will be undertaken to determine if the EBS is causing the introduction of unwanted bird species to the surrounding primary production areas. If it is determined that a net is required, it will be installed at water level and will not be visible to the public from outside the site. The construction phase of the development is expected to be 6-8 months in duration. Figure 1: Proposed site layout 4 SCAP Agenda Item 3.1.1 25 October 2018 Figure 2: Eastern cross section showing landscaping, security fence & boundary fence Figure 3: Southern cross section Figure 4: Back up diesel generator 5 SCAP Agenda Item 3.1.1 25 October 2018 Figure 5: example of SA Water standard security fencing Figure 6: example of bird netting (if required) 6 SCAP Agenda Item 3.1.1 25 October 2018 3. SITE AND LOCALITY 3.1 Site Description The site consistent of one (1) allotment, described as follows: Lot No Section Street Suburb Hundred Title A1 A118 Porter Road Korunye Port Gawler CT 5662/19 The subject land is located approximately 5km north-west of Two Wells at the corner of Hart and Porter Roads (both council-maintained dirt roads) approximately 400m east of Port Wakefield Road, in the area named Korunye, Hundred of Port Gawler: Allotment 1, F216939, Section A118 (CT Volume 5662 Folio 19). The land was subject of a separate land division (1 into 3 allotments), approved 25 August 2018. This division created two additional allotments. Following the subdivision, SA Water has purchased the middle allotment (Allotment 1). The subdivision enables SA Water to use this allotment leaving the balance of the land for primary production use and maximises the buffer space to nearby dwellings. The site is partially situated within the 2015 Adelaide Plains Council flood hazard risk areas (100yr ARI flood plain).