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PA2906-Coastal Hazard Assessment-R1 · MCU21/0212
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REPORT 66 Seaview Terrace, Sunshine Beach Coastal Hazards Assessment Client: Gavin & Catherine Deane (c\- Pivitol Planning) Reference: PA2906-RHD-ZZ-XX-RP-Z-0001 Status: S0/P01.01 Date: 15 October 2021
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HASKONINGDHV NEDERLAND B.V.
,
Industry & Buildings
Trade register number: 56515154
email E
royalhaskoningdhv.com W
Document title: 66 Seaview Terrace, Sunshine Beach
Document short title: 66 Seaview Terrace, Sunshine Beach
Reference: PA2906-RHD-ZZ-XX-RP-Z-0001
Status: P01.01/S0
Date: 15 October 2021
Project name: 66 Seaview Terrace, Sunshine Beach
Project number: PA2906
Classification
Internal use only
Unless otherwise agreed with the Client, no part of this document may be reproduced or made public or used for any
purpose other than that for which the document was produced. HaskoningDHV Nederland B.V. accepts no
responsibility or liability whatsoever for this document other than towards the Client.
Please note: this document contains personal data of employees of HaskoningDHV Nederland B.V.. Before
publication or any other way of disclosing, this report needs to be anonymized.
15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 i
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Internal use only Revision history Revision Date Description Prepared Checked Approved D1 15/10/2021 Final Draft P Prenzler D Messiter R1 28/10/2021 Final P Prenzler D Messiter N Lewis 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 2
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Internal use only Contents 1 Introduction 5 2 Site Description 6 2.1 Development Proposal 6 2.2 Site Inspection 7 2.3 Geotechnical Investigations 7 2.4 Survey 7 3 Historical Aerial Photograph Analysis 8 4 Queensland Planning Framework 13 4.1 Planning Act 2016 13 4.2 Coastal Management Mapping 13 5 Coastal Processes 16 5.1 Tides and Storm Tide 16 5.1.1 Astronomical Tides 16 5.1.2 Sea Level Rise 16 5.1.3 Storm Tide 16 5.2 Wave Climate 17 5.3 Sediment Transport 19 6 Erosion Prone Area 20 6.1 Erosion Prone Area Reassessment 20 6.1.1 Long-term Erosion (N x R) 21 6.1.2 Short-term Erosion (C) 21 6.1.3 Recession due to Sea Level Rise 26 6.1.4 Dune Scarp Component 27 6.1.5 Summary of the Erosion Prone Area Reassessment 27 7 Coastal Building Line 29 8 Conclusion 30 9 References 31 Table of Tables Table 1 Noosa Head Tidal Planes (Maritime Safety Queensland, 2021) 16 Table 2 Adopted Storm Tide Levels (excluding wave setup) for Sunshine Beach (Aurecon, 2013) 17 Table 3 Summary of Long-Term Recession Results from BMT (2018) 21 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 iii
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Internal use only Table 4 Design Storm Events for Short-term Beach Erosion Assessment 23 Table 5 Predicted Short-term Erosion - Sunshine Beach 25 Table 6 Summary of Shoreline Recession due to Sea Level Rise 26 Table 7 Reassessed Erosion Prone Area for 66 Seaview Terrace, Sunshine Beach 27 Table of Figures Figure 1 Site Location 6 Figure 2 1972 Aerial Photograph (qimagery.information.qld.gov.au) 8 Figure 3 1974 Aerial Photograph (qimagery.information.qld.gov.au) 9 Figure 4 1981 Aerial Photograph (qimagery.information.qld.gov.au) 9 Figure 5 1988 Aerial Photograph (qimagery.information.qld.gov.au) 10 Figure 6 1994 Aerial Photograph (qimagery.information.qld.gov.au) 10 Figure 7 1999 Aerial Photograph (qimagery.information.qld.gov.au) 11 Figure 8 2004 Aerial Photograph (qimagery.information.qld.gov.au) 11 Figure 9 Shoreline Position from Digital Earth Australia Coastline (Geoscience Australia) 12 Figure 10 Coastal Management District (source: SARA DA Mapping System) 14 Figure 11 Erosion Prone Area (source: SARA DA Mapping System) 14 Figure 12 Coastal Building Line (source: SARA DA Mapping System) 15 Figure 13 Wave Rose for Sunshine Beach (BMT, 2013) 18 Figure 14 Offshore Significant Wave Height Design Curves (BMT, 2013) 18 Figure 15 Sketch of pre-storm and predicted post-storm profiles based on Vellinga (1983) 22 Figure 16 100-year ARI storm profile (Vellinga, 1983) at 66 Seaview Terrace for current climate 24 Figure 17 Extreme storm event profile (Vellinga, 1983) at 66 Seaview Terrace for current climate 25 Figure 18 Conceptualisation of recession due to sea level rise due to Bruun Rule (Bruun, 1962) 26 Figure 19 Extent of the reassessed erosion prone area 28 Appendices Appendix A: Development Proposal Appendix B: Erosion Prone Area Plans Appendix C: Site Survey by Minstaff Survey Pty Ltd 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 iv
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Internal use only 1 Introduction Royal HaskoningDHV (RHDHV) has been engaged by Gavin and Catherine Deane, the owners of 66 Seaview Terrace (Lot 69 on RP81810), Sunshine Beach to undertake a coastal hazards assessment in relation to the subject property. The subject site is currently vacant, and the owners intend to construct a three-level house. The site is subject to coastal planning constraints layers and this coastal hazard risk assessment is required to address the assessment requirements of Noosa Shire Council and the State Assessment Referral Agency. The assessment reported herein provides a site-specific assessment of erosion hazard risk, including a reassessment of the erosion prone area width and an assessment of the beach erosion likely to occur with an extreme storm event. Accordingly, it provides an estimate of erosion vulnerability along this section of beach and will be used to address the assessment criteria considered by Noosa Shire Council and the Queensland Government. It should be noted that that the erosion prone area reported is an estimate of erosion vulnerability and does not consider the likely planning response to beach erosion for previously developed coastal areas. Previous development applications for other properties in Seaview Terrace, Sunshine Beach had considered the extent of erosion likely to occur with an extreme storm event. These previous development applications were decided through a Planning and Environment Court ordered mediation processes between the applicants and Noosa Shire Council. For these previous development applications an extreme event consisting of a 500 year ARI storm tide level, sea level rise of 0.8 metres and a 100 year ARI significant wave height was agreed through mediation and adopted as the criteria for the design of the building foundations. The assessment in this report has adopted the same criteria as the assessments for the previous developments within Seaview Terrace, Sunshine Beach. 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 5
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Internal use only 2 Site Description The site is a 574 square metre residential property located at 66 Seaview Terrace (Lot 69 on RP81810), Sunshine Beach, see Figure 1. The site slopes away from Seaview Terrace towards the dunes that adjoin Sunshine Beach with a change in elevation from Seaview Terrace to the rear property boundary of approximately 7 metres. The rear property boundary that adjoins the dune is elevated at approximately 28 metres above Australian Height Datum (AHD). Sunshine Beach is located south of Noosa Head and has an east-south-easterly aspect with exposure to waves from the north-east, east, and south-easterly sectors. The site is approximately 210 metres south of Noosa Headland which has a significant influence on coastal processes and sand transport along this section of coastline. A small ephemeral creek crosses the beach to the north of the site. This creek is observed in aerial photography to meander across the beach. Figure 1 Site Location 2.1 Development Proposal The subject property is currently vacant. It is proposed to construct a three-level house and a pool on the property. The lower level and pool are to be setback on the landward side of the coastal building line. The ground floor is proposed to be cantilevered seaward of the coastal building line such that the building’s foundations would be setback landward of the coastal building line. 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 6
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Internal use only The architectural drawings of the proposed house and pool are presented in Appendix A. 2.2 Site Inspection A site inspection was undertaken by Paul Prenzler and Andrew Fielding on 23 September 2021 to observe the site conditions and undertake field measurements of the beach. The ‘seaward toe of the frontal dune’ was mapped using a handheld GPS to assist with determining the erosion prone area width at the site. The ‘seaward toe of the frontal dune’ was determined based on the guidance provided in the ‘Coastal Hazards Technical Guide’ (Department of Environment and Heritage Protection, 2013) and the notes of NOS3A dated 8 July 2015 prepared by the Department of Environment and Science (refer Appendix B). Figure 1 shows the ‘seaward toe of the frontal dune’ on Sunshine Beach near the subject site in 2019 and 2021. The distance from the rear property boundary of the site to the toe of the frontal dune approximately 90 metres. 2.3 Geotechnical Investigations The geotechnical conditions at the site have been investigated by Tectonic Geotechnical Pty Ltd. The scope of the geotechnical investigation includes the design of the house foundations to mitigate impacts on the structure from potential beach erosion. 2.4 Survey Survey of the site and adjoining beach system was undertaken by Minstaff Survey Pty Ltd on the 6th October 2021. The survey is presented in Appendix C. The survey has been supplemented with survey information from ETA 602 to describe the beach profile through the surf zone to the depth of closure. This is consistent with the approach adopted by BMT (2018). 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 7
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Internal use only 3 Historical Aerial Photograph Analysis Aerial photography has been reviewed to understand the historical extents of beach movement at the site. Figures 2 to 8 show the aerial photographs for 1972, 1974, 1981, 1988, 1994, 1999 and 2004 together with the toe of the frontal dune captured by hand-held GPS in 2019 and 2021. The beach was in an eroded state in 1971 and 1974, which was due to a high number of tropical cyclones impacting the south-east Queensland coastline during the late 1960’s and early 1970’s. The 1974 photograph shows the beach in its most eroded state in the photographic record and outcrops of indurated sand (i.e., coffee rock) can be seen adjacent to the dune vegetation. From the 1981 photograph onwards the beach is seen to be recovering and accreting to its current position show in Figure 1 (based on satellite imagery from 2021). There were 18 tropical cyclones within 200 kilometres of the site between 1960 and 1979, seven tropical cyclones between 1980 and 1999, and three tropical cyclones since 2000. The reduced number of tropical cyclones affecting the southeast Queensland region since 1980 is reflected in the beach recovery observed during this period. Figure 2 1972 Aerial Photograph (qimagery.information.qld.gov.au) 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 8
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Internal use only Figure 3 1974 Aerial Photograph (qimagery.information.qld.gov.au) Figure 4 1981 Aerial Photograph (qimagery.information.qld.gov.au) 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 9
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Internal use only Figure 5 1988 Aerial Photograph (qimagery.information.qld.gov.au) Figure 6 1994 Aerial Photograph (qimagery.information.qld.gov.au) 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 10
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Internal use only Figure 7 1999 Aerial Photograph (qimagery.information.qld.gov.au) Figure 8 2004 Aerial Photograph (qimagery.information.qld.gov.au) 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 11
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Internal use only The beach recovery that has been observed since 1980 is supported by analysis undertaken by Geoscience Australia as part of the Digital Earth Australia project. Geoscience Australia has undertaken analysis of shoreline changes since 1988 and for the subject site this has shown an average progradation of the beach of 0.5 metres annually (±0.3 metres). Figure 9 shows the averaged annual shoreline position since 1988 from the analysis undertaken by Geoscience Australia. Figure 9 Shoreline Position from Digital Earth Australia Coastline (Geoscience Australia) 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 12
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4 Queensland Planning Framework
The planning framework in Queensland is supported by the Planning Act 2016 which outlines the plan-
making system that guides strategic planning and development assessment. In relation to coastal
development there are specific requirements that are discussed in the following sections.
4.1 Planning Act 2016
The Planning Act 2016 details the planning and development approval framework for Queensland. In
relation to this application, the proposed house footprint is a trigger to consider building works seaward of
a coastal building line.
The Planning Act 2016 includes provision for the State Development Assessment Provisions (SDAP) to
form the assessment criteria for development assessed by the Queensland Government. Performance
Outcome 6 of SDAP State Code 8 states, “In areas where a coastal building line is present, building work
is located landward of the coastal building line unless coastal protection work has been constructed to
protect the development”. This is the only performance outcome that relates to a Coastal Building Line.
4.2 Coastal Management Mapping
The Coastal Protection and Management Act 1995 provides for the declaration of erosion prone areas,
coastal management districts and coastal building lines, which are used as triggers for development
approvals under the Planning Act 2016.
The site is located within three coastal management mapping layers prepared by the Queensland
Government Department of Environment and Science. These mapping layers are:
Coastal management district (see Figure 10);
Coastal area - erosion prone area (see Figure 11); and
Coastal building line (see Figure 12).
The State Planning Policy (dsdmipprd.blob.core.windows.net/general/spp-july-2017.pdf) requires local
governments, including Noosa Shire Council, to base their planning scheme mapping on the above
mapping. The specific details of the erosion prone area and coastal building line for this site will be further
discussed in Sections 6 and 7.
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Internal use only Figure 10 Coastal Management District (source: SARA DA Mapping System) Figure 11 Erosion Prone Area (source: SARA DA Mapping System) 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 14
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Internal use only Figure 12 Coastal Building Line (source: SARA DA Mapping System) 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 15
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5 Coastal Processes
The coastal processes of interest to this investigation are water levels (including sea level rise
predictions), wave conditions, and sediment transport processes.
5.1 Tides and Storm Tide
The water levels of interest for a reassessment of the erosion prone area include the astronomical tide,
storm tide and the predicted rise in mean sea level associated with climate change. The following
sections describe the water levels adopted for the assessment.
5.1.1 Astronomical Tides
Sunshine Beach adjacent to the site experiences semi-diurnal tides with a tidal range of 1.4 metres at
spring tides. Table 1 presents the published tidal planes for Noosa Head (Maritime Safety Queensland,
2021) which are considered consistent with conditions at Sunshine Beach due to the proximity.
Table 1 Noosa Head Tidal Planes (Maritime Safety Queensland, 2021)
Water Level Water Level
Tidal Plane
(m above LAT) (m AHD)
Highest Astronomical Tide 2.28 1.157
Mean High Water Spring 1.78 0.657
Mean High Water Neap 1.45 0.327
Mean Sea Level 1.06 -0.063
Mean Low Water Neap 0.71 -0.413
Mean Low Water Spring 0.38 -0.743
Lowest Astronomical Tide - -1.123
5.1.2 Sea Level Rise
The effects of climate change associated with emission of greenhouse gases has caused a rise in mean
sea level above pre-industrial levels, and sea levels are predicted to continue to rise into the future. The
Queensland Government has adopted a predicted sea level rise of 0.8 metres by the year 2100 above
present day mean sea level. It is noted that BMT (2018) adopted the following sea level rise allowances
(above present day mean sea level) as part of phase 3 of the Coastal Hazard Adaptation Strategy
(CHAS):
0.2 metres by 2040,
0.5 metres by 2070, and
0.8 metres by 2100.
The adopted sea level rise allowances are consistent with industry practice and will be used for this
assessment.
5.1.3 Storm Tide
Storm tide is the total water level associated with the combination of the normal astronomical tide and the
tidal surge from a storm event (e.g., tropical cyclone). There have been several previous storm tide
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studies undertaken for the Sunshine Coast with the most recent being the ‘Sunshine Coast Storm Tide
Study’ (Aurecon, 2013). The design storm tide levels determined by Aurecon (2013) for the 100, 500 and
1000-year ARI events are presented in Table 2.
Noosa Shire Council has undertaken a broad-scale reassessment of coastal hazards from Peregian
Beach to Teewah Beach as part of the ‘Noosa Shire Council Coastal Hazards Risk, Vulnerability and
Adaptation Assessment’ (BMT, 2018). The 100-year ARI storm tide level of 1.74m AHD was adopted by
BMT (2018) for the reassessment of the erosion prone area width at Sunshine Beach.
To address the SDAP (Performance Outcome 6 of State Code 8) outlined in Section 4.1 the vulnerability
of the proposed property and house to an extreme storm events has been considered and assessed. As
discussed in the introduction, a 500-year ARI storm tide level has been adopted for the extreme analysis
with an allowance for climate change induced sea level rise of 0.8 metres. The extreme event
assessment is discussed further in Section 6.1.2.
Table 2 Adopted Storm Tide Levels (excluding wave setup) for Sunshine Beach (Aurecon, 2013)
Current Climate
Return Period
Storm Tide Level
(years ARI)
(m AHD)
100 1.74
500 1.84
1000 1.89
5.2 Wave Climate
The wave climate at Sunshine Beach is influenced by both locally wind-generated sea and ocean swell.
Sea describes wind generated waves where wind energy is still being transferred to the ocean. Swell
describes wind generated waves that have travelled out of their generating area. Swell characteristically
exhibits smoother, more regular, and uniform crests and a longer period than wind waves. In open coastal
areas sea waves generated by local winds are often superimposed on swell waves.
The wave climate for Sunshine Beach has been previously reported by BMT (2013), ‘Coastal Processes
Study for the Sunshine Coast’ prepared for the Sunshine Coast Regional Council. BMT WBM (2013) has
shown the wave climate for Sunshine Beach is dominated by waves from the east-southeast direction
(refer Figure 13 Wave Rose for Sunshine Beach (BMT, 2013)).
The design offshore significant wave heights for the Sunshine Coast have been previously published by
BMT (2013), refer Figure 14. For this assessment a 100-year ARI offshore significant wave height of 6.2
metres has been adopted to be consistent with the BMT (2013) assessment.
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Internal use only Figure 13 Wave Rose for Sunshine Beach (BMT, 2013) Figure 14 Offshore Significant Wave Height Design Curves (BMT, 2013) 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 18
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Internal use only 5.3 Sediment Transport Sand is transported over time in a net northerly direction along the Sunshine Coast driven by the prevailing south-easterly wave climate in a process known as littoral drift. The average longshore littoral transport rate at Sunshine Beach has previously been estimated at 23,300 cubic metres annually (BMT, 2013). Noosa Head at the northern end of Sunshine Beach is a control feature that influences sand transport processes. The net northerly littoral transport of sand along Sunshine Beach is interrupted by the headland which traps sand on the southern side (i.e., Sunshine Beach) until such time that the beach to the south is effectively “full” at which point some sediment bypassing of the headland will occur. Noosa Head also provides protection to Sunshine Beach from waves from the northeast quadrant that will be more prevalent during the summer cyclone season. It is also likely that Noosa Head would assist with post-storm event beach recovery of Sunshine Beach through the trapping of long-term net northerly littoral transport of sand and associated rebuilding of the beach system towards a beach full state. The location of the site relative to Noosa Heads and ongoing littoral transport process ensure that (in the absence of sea level rise) the foreshore at the site will fluctuate within a steady state envelope of positions; subject to short term storm erosion events, but long term always accretes towards a beach full state controlled by the headland. 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 19
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6 Erosion Prone Area
The erosion prone area identifies land that may be vulnerable to coastal erosion or tidal inundation over a
100-year planning period and are declared under section 70 of the Coastal Protection and Management
Act 1995.
The ‘Coastal Hazards Technical Guide’ (Department of Environment and Heritage Protection, 2013)
provides guidance on the calculation of an erosion prone area. The erosion prone area width is based on
the following:
short-term erosion from extreme storm events (e.g., a tropical cyclone);
a dune scarp component to accommodate slumping of the erosion scarp following short-term
erosion;
long-term erosion associated with a deficit in sediment supply;
shoreline recession due to sea level rise; and
a 40% safety factor.
The Erosion prone area is calculated using the following equation:
𝐸 = {(𝑁 × 𝑅) + 𝐶 + 𝑆} × (1 + 𝐹) + 𝐷 Equation 1
Where:
E= Erosion Prone Area (metres)
N= planning period (years)
R= rate of long-term erosion (metres/year)
C= short-term erosion from the design storm event (metres)
S= recession due to sea level rise (metres)
F= factor of safety (0.4)
D= Dune scarp component to allow for slumping of the erosion scarp (metres)
The calculation of the erosion prone area assumes:
the beach and dune consist of unconsolidated loose sand with uniform physical characteristics;
physical features (e.g., headland) do not influence sand movement;
the duration of storm events is sufficient to allow for an equilibrium storm beach profile to develop;
and
the long-term erosion trend is independent of recession due to sea level rise.
6.1 Erosion Prone Area Reassessment
The declared erosion prone area for the Noosa Shire Council area is provided on Department of
Environment and Science Plan Number NOS3A dated 8 July 2015 (refer Appendix B). This shows an
erosion prone area width for Sunshine Beach of 175 metres measured inland from the seaward toe of the
frontal dune.
Noosa Shire Council has completed a Coastal Hazard Adaptation Study (CHAS) through the QCoast2100
program. Phase 3 of the CHAS involved refining coastal hazard mapping, including reassessment of the
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erosion prone area undertaken by BMT (2018). It should be noted that the reassessment by BMT (2018)
was at a beach compartment scale and did not provide site-specific estimation of erosion vulnerability.
The following sections will review each component of the Erosion prone area based on site specific
conditions.
6.1.1 Long-term Erosion (N x R)
The long-term erosion component is based on the selected planning period (N) and the average annual
rate of long-term erosion (R).
In relation to the planning period, the Department of Environment and Heritage Protection (2013) states,
“The long-term erosion component (excluding sea level rise) of the calculation is often cyclical in nature
and typically of a decadal scale. For this reason, it is considered the estimated annual rate of long-term
erosion is only applied for a 50-year period”. Where there is no clear evidence of long-term erosion
trends, the Department recommends a nominal provision of 10 metres.
The annual rate of long-term erosion (R) reflects changes to sediment supply to a beach and where there
is a long-term deficit in sediment supply this results in a longer-term recession of the shoreline. BMT
(2018) has calculated the long-term erosion rate for Sunshine Coast at beach profile line ETA 602. Table
3 provides a summary of BMT (2018) estimated long-term erosion for 2040, 2070 and 2100.
Table 3 Summary of Long-Term Recession Results from BMT (2018)
Annual Recession Long-Term Recession (m)
Beach Survey Profile
Rate (m/year) 2040 (N=23) 2070 (N=53) 2100 (N=3)
Sunshine Beach ETA 602.0 0.03 0.7 1.6 2.5
BMT (2018) calculated an annual long-term erosion rate of 0.03 metres/year for Sunshine Beach.
However, the subject site is located approximately 210m south of Noosa Headland which will influence the
sediment transport processes along this section of coast by trapping the long-term net northerly littoral
transport of sand (discussed in Section 5.3). This is supported by the assessment of aerial photography
presented in Section 4 which has shown recovery and progradation of the beach adjacent to the site
since severe storm event related erosion in the early 1970’s.
It is noted that BMT (2018) had adopted a nominal 10m value for long-term erosion for erosion prone area
calculation over a 100-year planning period and this is in accordance with the Department of Environment
and Heritage Protection (2013) methodology. This is consistent with the Department of Environment and
Heritage Protection (2013) methodology. However, it does not consider the effect of the site’s proximity to
Noosa Headland which will reduce long-term erosion.
Long-term erosion of 0 metres is considered more realistic given the influence of Noosa Headland which
would act in a similar fashion to a groyne by trapping sand moving north along the coast with the
prevailing south-easterly wave climate.
6.1.2 Short-term Erosion (C)
The Department of Environment and Heritage Protection (2013) recommends the calculation of the short-
term erosion based on a 100-year ARI storm event using the method developed by Vellinga (1983).
Figure 15 shows a conceptual representation of the erosion and accretion zones associated with storm
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induced erosion predicted by Vellinga (1983). The Department provides the following recommendation in
relation to defining a storm event:
“For a tide-dominated coast where storm tide levels can be large, the parameters
adopted for the minimum design storm are:
storm tide level corresponding to an average recurrence interval of 1-in-
100 years
wave height for a moderate storm using the 1-in-20-year significant wave
height (Hs).
However, for wave-dominated coastlines where extreme storm tide levels can be
relatively minor, such as the Gold Coast, the significant wave height and duration
of the storm event are major factors influencing short term erosion, rather than
storm tide. Hence it may be necessary to consider a larger wave event (for
example, a storm event with a 1-in-100 ARI) and a moderate storm tide level.
Decisions on appropriate parameters to be used must be based on local
conditions and the experience of the coastal engineer undertaking the
assessment.”
Figure 15 Sketch of pre-storm and predicted post-storm profiles based on Vellinga (1983)
In relation to the probability of such an event occurring the Department of Environment and Heritage
protection (2013) states:
“Although the abovementioned probability of occurrence may appear to be fairly
high, it is considered that this choice is reasonable when considered in
conjunction with the method used to determine erosion prone area widths. This
method implies that the erosion prone area has sufficient width to accommodate
the design storm erosion in 100 years’ time, when all of the estimated long-term
erosion has occurred. Therefore, it also follows that for much of the 100-year
planning period, the erosion prone area is sufficient to accommodate a larger
storm than the one selected for design purposes. In fact, in the most critical last
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10 years of such a planning period, there is only a 10% probability of occurrence
of the design storm. Thus, the risk of a storm breaching the entire erosion prone
area at some time during the 100-year period will be significantly less than 63%.”
BMT (2018) adopted a combination of a 100-year ARI Storm Tide level and 100-year ARI significant wave
height as the design storm event for the reassessment of erosion prone areas with Noosa Shire Council.
It should be noted that the joint probability of a combined 100-year ARI storm tide and 100-year ARI
significant wave height is likely to greater than a 100-year ARI storm event. This combination of design
storm tide level and wave height will be adopted for the site-specific reassessment of the erosion prone
area reported herein.
An additional assessment of short-term erosion will be undertaken for a more extreme event to assess the
vulnerability of the proposed house and pool to assist with foundation design. The design parameters for
the assessment of the short-term beach erosion and scenarios are presented in Table 4.
Table 4 Design Storm Events for Short-term Beach Erosion Assessment
Storm Event
Storm Component
100-year ARI Extreme Event
Significant Wave Height 6.2m 6.2m
Storm Tide 1.74m AHD 1.84m AHD
Sea Level Rise - 0.8m
Figure 16 and Table 5 present the results of the modelled storm erosion associated with the above 100-
year ARI design storm event. This shows storm erosion of 51 metres measured from HAT position on the
current beach profile (pre-storm profile) to the toe of the erosion scarp.
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Internal use only Figure 16 100-year ARI storm profile (Vellinga, 1983) at 66 Seaview Terrace for current climate Figure 17 and Table 5 present the results of the modelled storm erosion associated with the extreme design event. This shows a storm erosion cut of 73 metres is predicted to occur and will be used to inform slope stability assessment and foundation design by the geotechnical engineering consultants, Tectonic Geotechnical Pty Ltd. 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 24
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Figure 17 Extreme storm event profile (Vellinga, 1983) at 66 Seaview Terrace for current climate
Table 5 Predicted Short-term Erosion - Sunshine Beach
Predicted Short-term
Design Water Level Significant Wave Height
Design Event Erosion
(m AHD) (m)
(m)
100-year ARI Event 1.74 6.2 58
Extreme Event 2.64 6.2 82
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6.1.3 Recession due to Sea Level Rise
As discussed in Section 5.1.2, sea levels are predicted to rise in response to climate change and the
Queensland Government have adopted a sea level rise of 0.8 metres above present day mean sea level
by the year 2100. The Department of Environment and Heritage Protection (2013) requires the shoreline
response to sea level rise be considered when assessing erosion prone area widths. An industry
standard practice for the assessment of shoreline recession due to sea level rise is to apply the ‘Bruun
Rule’ (Bruun, 1962), see Figure 18.
Figure 18 Conceptualisation of recession due to sea level rise due to Bruun Rule (Bruun, 1962)
The Bruun Rule assumes an equilibrium beach profile is maintained with rising sea level resulting in an
elevation and landward movement of the profile, as shown in Figure 18. The Bruun Rule is given by:
𝑟= Equation 2
Where:
r= shoreline recession due to sea level rise (m)
B= horizontal distance of the active beach profile (m)
a= rise in mean sea level (m)
D= vertical height of the active beach profile (m)
The Bruun Rule assumes that the beach and dune consist of a uniform loose sand material. It is also
applicable to long straight sections of beach. The geotechnical assessment which is supported by aerial
photography from 1974 has shown the underlying soil profile includes indurated sand layers (i.e., coffee
rock) which may slow recession rates.
The assessment of recession due to sea level rise is presented in Table 6. The profile adopted has been
based on site survey supplemented with Sunshine Beach profile survey for ETA 602.0. Based on the
information available an active beach height of 40 metres has been adopted from the depth of closure of -
12m AHD to the dune height at the rear of the subject property of 28m AHD. This provides an active
beach profile width of 550 metres.
Table 6 Summary of Shoreline Recession due to Sea Level Rise
Profile Width Dune Height Depth of Closure 2100 Shoreline Recession
Beach
(m) (m AHD) (m AHD) (m)
Sunshine Beach 550 28 -12 11
15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 26
Page 28
Internal use only
6.1.4 Dune Scarp Component
The methodology for calculating the erosion prone area includes an allowance for slumping of the frontal
dune following a short-term erosion event.
The angle of repose for dry sand is 35o and this has been used to determine the dune scarp component of
the erosion prone area. The short-term erosion calculations shown in Figure 16 and Table 5 indicate a
dune scarp of approximately 2 metre and this would result in erosion due to slumping of approximately 4
metres.
6.1.5 Summary of the Erosion Prone Area Reassessment
The erosion prone area reassessment for this appeal has been undertaken in accordance with the
Department of Environment and Heritage Protection (2013) requirements with a planning period of 100
years to accommodate the asset lifespan of the proposed house. We have also considered the effect of
shoreline recession due to 0.8 metres of sea level rise, short-term erosion associated with a 100-year ARI
storm event and dune scarp recession.
The site-specific erosion prone area calculated for the site is 91 metres measured from the seaward toe of
the frontal dune. The components of the erosion prone area for 66 Seaview Terrace, Sunshine Beach are
presented in Table 7 and the spatial extents are shown in Figure 19.
Table 7 Reassessed Erosion Prone Area for 66 Seaview Terrace, Sunshine Beach
Erosion Prone Area Component Value
Long-term Erosion (m) 0
Short-term Erosion (m) 58
Recession due to 0.8m SLR (m) 11
Safety Factor 1.4
Dune scarp slumping (m) 4
Erosion prone area Width (m) 101
15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 27
Page 29
Internal use only Figure 19 Extent of the reassessed erosion prone area 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 28
Page 30
Internal use only 7 Coastal Building Line Coastal building lines were introduced as a planning control by the former Beach Protection Authority under the provisions of the Beach Protection Act 1968 (repealed) and have been continued through transitional provisions in the Coastal Protection and Management Act 1995. The Coastal Building Line is an arbitrary line placed over properties with the intention to accommodate natural erosion and accretion processes associated with storm events (i.e., the short-term erosion component of the erosion prone area). Coastal Building Lines are declared under section 66 of the Coastal Protection and Management Act 1995. The Coastal Building Line at 66 Seaview Terrace is located 10 metres measured from the seaward property boundary. It is used as a development trigger under the Planning Act 2016 for assessment of building works within a Coastal Management District against the provisions of the State Development Assessment Provisions (SDAP). Performance Outcome PO6 of SDAP State Code 8 states, “In areas where a coastal building line is present, building work is located landward of the coastal building line unless coastal protection work has been constructed to protect the development”. The proposed building has been designed to cantilever seaward of the coastal building line, with the foundations of the building located landward of the coastal building line. This approach is considered to comply with this performance outcome as it achieves the protection required for the building from the storm events considered in Section 6.1.2. Figure 17 shows the extent of short-term erosion and dune scarp recession for an extreme storm event consisting of a 500-year ARI storm tide level, climate change induced sea level rise and a 100-year ARI significant wave height. The site is located outside of the zone that may be vulnerable to short-term erosion and as such it is unlikely that the coastal building line would have been applied to the site by the former Beach Protection Authority with the information currently available. 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 29
Page 31
Internal use only 8 Conclusion A detailed coastal engineering assessment has been undertaken to assess the vulnerability to erosion of the beach adjacent to 66 Seaview Terrace, Sunshine Beach, Noosa Shire. The methodology adopted for this report is based on best practice and is appropriate for risk assessment in relation to the proposed development and the coastal hazard associated with beach erosion for the section of beach in the vicinity of 66 Seaview Terrace, Sunshine Beach. This assessment has found that the proposed house and pool are unlikely to be subject to erosion from the sea during the expected asset lifespan (i.e., 60 years for a residential house). The assessment also found that the proposed development will not impact on the future coastal management option for this section of Sunshine Beach. To accommodate future climate conditions, it is recommended that a site-specific slope stability assessment be undertaken to inform the design of foundations of the house to mitigate impacts from beach erosion associated with future climate conditions as presented in Figure 17. Construction of the proposed house at 66 Seaview Terrace, Sunshine Beach as shown in Appendix A, with appropriate foundation design, would not adversely impact coastal processes and would not affect the future coastal management options for this section of Sunshine Beach. 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 30
Page 32
Internal use only
9 References
Allen, M., & Callaghan, J. (2001). Extreme Wave Conditions for the South Queensland Coastal Region -
Environmental Technical Report No. 32. Brisbane: Queensland Environmental Protection Agency.
Aurecon. (2013). Sunshine Coast Storm Tide Study - Storm Tide Definition. Brisbane: Aurecon.
Beach Protection Authority. (1984). Hervey Bay Beaches. Brisbane: Queensland Goverment.
BMT. (2013). Coastal Processes Study for the Sunshine Coast. Brisbane: BMT.
BMT. (2018). Noosa Shire Council Coastal Hazards Risk, Vulnerability and Adaptation Assessment -
Coastal Hazard Mapping Refinement. Brisbane: BMT.
Bruun, P. (1962). Sea Level Rise as a cause of shoreline recession. ASCE Journal, Waters and Harbours
Division, Vol. 188, 117-130.
Department of Environment and Heritage Protection. (2013). Coastal Hazards Technical Guide -
Determining Coastal Hazard Areas. Brisbane: Department of Environment and Heritage
Protection.
Maritime Safety Queensland. (2021). Queensland Tidal Planes. Retrieved from
https://www.msq.qld.gov.au/Tides/Tidal-planes
Patterson, C. (1986). Storm Tide Statistics. Beach Protection Authority - Beach Conservation, Issue 62.
15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 31
Page 33
Internal use only Appendix A: Development Proposal 15 October 2021 66 SEAVIEW TERRACE, SUNSHINE BEACH PA2906-RHD-ZZ-XX-RP-Z-0001 32
Page 34
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane cover page SD 000.00 C SCALE
cover page
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 35
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.50 C SCALE
3d views - sheet 01
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 36
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.51 C SCALE
3d views - sheet 02
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 37
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.52 C SCALE
3d views - sheet 03
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 38
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.53 C SCALE
3d views - sheet 04
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 39
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.54 C SCALE
3d views - sheet 05
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 40
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.55 C SCALE
3d views - sheet 06
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 41
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.56 C SCALE
3d views - sheet 07
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 42
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.57 C SCALE
3d views - sheet 08
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 43
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
DL C 20.10.21 Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.58 C SCALE
3d views - sheet 09
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 44
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
DL C 20.10.21 Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.59 C SCALE
3d views - sheet 10
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 45
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
DL C 20.10.21 Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.60 C SCALE
3d views - sheet 11
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 46
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
DL C 20.10.21 Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.61 C SCALE
3d views - sheet 12
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 47
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
DL C 20.10.21 Prelim DA
66 Seaview Tce, G & C Deane 3d view SD 000.62 C SCALE
3d views - sheet 11
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 48
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane SD 000.610 C SCALE
3d views - sheet 11
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 49
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
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24.09.21
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schematic design
Prelim DA
66 Seaview Tce, G & C Deane reference images SD 020.00 C SCALE 1 : 10
reference images - sheet 01
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 50
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane reference images SD 020.01 C SCALE 1 : 10
reference images - sheet 02
Sunshine Beach schematic design
1:1 @ A3
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
Page 51
A B C D F site details
E
2750 4990
3000 7500 60 and 66 Seaview Tce,
LOT 4 Sunshine Beach QLD 4567
36000
0
0
00
0
00
RP189884
E
0
00
35
0
00
34
0
00
33
00
32
Lot 96 on RP 81810
31
30
annel
Site Area 576 sqm
E
and ch
DN public walkway site boundary | 24.635 m approx | 94° 20' 40"
areas
te kerb
E
36000
concre
proposed new dwelling
2.0m setback
lower ground
internal 176.70 m²
1 se
site boundary | 22.183 m approx | 4° 20' 40"
external - pav 26.40 m²
S
external - pool 23.15 m²
LOT 51 sub total 226.25 m²
LOT 69
RP81810
RP81810
S
ground floor
6660
internal 260.30 m²
Terrace
proposed 2
story dwelling external 26.50 m²
site bounda
external - pav 23.20 m²
S
sub total 310.00 m²
ry | 22.34
2 level 01
Seaview
S
internal 49.05 m²
8 m appro
3220
external 50.40 m²
sub total 99.45 m²
S
x | 177° 21'
3 subtotal internal 486.05 m²
subtotal external 149.65 m²
50"
S
proposed new
total 635.70 m²
6580
driveway
site cover
S
max 40% = 230.40 m²
lower ground 198.20 m² / 34.41%
S
4
ground floor 228.39 m² / 39.56%
0
E 2.0m setback
3400
level 01 52.65 m² / 9.14%
10.5m coa
E
E
S
E elec pillar site boundary | 27.345 m approx | 274° 20' 40"
2.0m setback
7.5m setba
0 stal setback
0
00
00
E
elec
30
31
E
E E E E E
notes
S
power pole
ck
EE E
LOT 68
E
E
RP81810 1. All works to be carried out in
E
34000
00
0
0
0
0
00
00
00
00
accordance with the general
330
E
28
27
29
S
32
E roof ridge approx FFL 35.750 construction notes on coversheet of this
E
package.
2. All works to be carried out in
accordance with the DA and BA
including drawings & conditions.
3. Areas measured to outside face of
walls. External covered area
calculations do not include external
areas under eaves, driveway and
uncovered hardscaping.
legend
S S S S
existing sewer line
Sw Sw Sw Sw
existing stormwater line
E E E E
existing electrical line
T T T T
existing telephone
W W W W
existing water line
note: refer survey for all existing services
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
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24.09.21
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schematic design
Prelim DA
66 Seaview Tce, G & C Deane site plan SD 100.00 C SCALE As
indicated
proposed site plan
Sunshine Beach schematic design
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
1:1 @ A3
Page 52
A B C D F
A B C D F A B C D F
2050 2760 4990 2050 2760 4990
3000
7500 UP 3000
7500 DN 2050 2760 4990
7500
3000
3622
3622
3622
2.0m setback 2.0m setback 2.0m setback
2.0m setback
2.0m setback
2.0m setback
pool pool
line of building over line of building over line of awning over
1 1 1
600
600
600
line of building over
600
line of build
line of void over
6660
6660
6660
ing over
810 600 60
line of build
line of build
600 0
line of void over line of building over
600
600
ing over
ing over
2 2 2
198.02 sqm 228.39 sqm 52.65 sqm firepit
er
wash
ov
3220
3220
3220
ing
wn
up
fa
3 3 3
eo
600
pebble
lin
services
roof A/C
6580
6580
6580
3000 solar
600 array
160
1233
7.5m setba
7.5m setba
7.5m setba
600
4 4 4
160
line of building over 2.0m setback line of building over 2.0m setback 2.0m setback
2100
2100
2100
ck
ck
ck
1 lower ground - site cover 2 ground level - site cover 3 level 01 - site cover
300.00 1 : 250 300.00 1 : 250 300.00 1 : 250
ngl +8.0m
ngl +8.0m
2.0m setback
2.0m setback 2.0m setback
2.0m setback
4 site setback 3D - view 01 5 site setback 3D - view 02
-
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
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schematic design
Prelim DA
66 Seaview Tce, G & C Deane area plans SD 100.01 C SCALE 1 : 250
area plans
Sunshine Beach
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
schematic design
1:1 @ A3
Page 53
A B C D F
2050 2760 4990
public walkway
7500
site boundary | 24.635 m approx | 94° 20' 40"
3000
2.0m setback
timber fence to boundary
31000
30000
29000
3622
pool window
2.0m setback
pool
pool window line of building over
1
sheer + blk
art
dumbells functional
trainer
bench
out
gym
step
1 tim
site bounda
400.02
bed 03 RL 30.100
site boundary | 22.183 m approx | 4° 20' 40"
tim
robe
bike
ry | 22.34
6660
natural art
ground
mirror wall
c/trainer
8 m approx
sheer + blk
cellar
| 177° 21
step
credenza
out
tim
' 50"
bed 02
tim
line of build
desk
2 robe
office
dry
1 tim
ing over
400.01
wm
laundry
family
3220
sheer
f/h store chute
hall
wm
tim
tile
powder
FFL 30.720
f/h store
rail over
tile up step
3
art
timber fen
FFL 30.720
linen
art
step
ce to boun
art
sheer + blk
shwr guest
tim
dary
drying ct bath ensuite
out
robe
6580
tile tile step
stone
FFL 30.630
3000
1 erhangs ab
ove
400.00 building ov
shwr
gate blind
surfboard store
outdoor step
shower
FFL 30.630
line of building over
4 2.0m setback 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
10.5m coa
up shr
2100
store
28000
7.5m setba
overhaning
0
stal setback
00
0
29
00
000
30
32000
31
timber fence to boundary
ck
site boundary | 27.345 m approx | 274° 20' 40"
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
ac
DL
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schematic design
Prelim DA
66 Seaview Tce, G & C Deane floor plan SD 200.00 C SCALE 1 : 100
lower ground
Sunshine Beach
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
schematic design
1:1 @ A3
Page 54
A B C D F
2050 2760 4990
public walkway
7500
site boundary | 24.635 m approx | 94° 20' 40"
3000
timber fence to boundary
0
pool
00
32000
31000
33
gate
30000
29000
swimming pool
3622
2.0m setback
FFL 33.830
1 shower
console
outoor room line of void over
pool living
tile
tile
site bounda
equipment
fireplace
site boundary | 22.183 m approx | 4° 20' 40"
1
400.02
ry | 22.34
35000
6660
Terrace
8 m approx
| 177° 21
scooter
Seaview
' 50"
line of void over
bbq
dining
tile
2
10 entry
1 tile
400.01
FFL 33.935 FFL 33.950 FFL 33.960
bar
3220
console f/ht chute
joinery
art
pdr
tile
18 17 16 15 14 13 12 11 10 9 8
up kitchen
tile
3
140
FFL 33.840 pantry
SUP over
timber fen
bikes
art
master bed
ce to boun
SUP over
340 tim
00 art
proposed new 20
dary
driveway
6580
garage robe ensuite
kyack over
SUP over
bath
2.0m setback
con01 tim tile
1 FFL 33.800
400.00
garage door over
skylight over
wc
f/ht joinery
shr
robe
robe
battery charger
4 2.0m setback 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
up
28000
2100
bikes
0
7.5m setba
00
0
29
00
000
32000
bins gas
30
31
timber fence to boundary
ck
elec pillar
site boundary | 27.345 m approx | 274° 20' 40"
DRAWN REV DATE ISSUE PROJECT CLIENT DRAWING NAME PHASE DWG NO REV PROJECT NO 0375
power pole
ac
DL
A
C
24.09.21
20.10.21
schematic design
Prelim DA
66 Seaview Tce, G & C Deane floor plan SD 200.01 C SCALE 1 : 100
ground level
Sunshine Beach
Do not scale from drawings. Dimensions are to be checked on site prior to commencement of work. Discrepancies to be brought to the attention of the author. Any dimensions not nominated must be referred to the Architect for confirmation. The concepts and information contained in this document are the copyright of Architect. Use or copying of the document in whole or in part without the written permission of the Architect constitutes an infringement of copyright.
schematic design
1:1 @ A3
The text continues on page 55.
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PA2906-Coastal Hazard Assessment-R1.pdfRelated documentApplication case desk ↗
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