Council archive · source document
RFI - App B - Civil Engineering Response · MCU25/0118
Attention: Noosa Shire Council 28 October 2025
C/- Coast2Bay Arcos Project: 240444
By Email Information Request Response
AG-240444-LET-C-01
PO Box 141,
Tewantin QLD 4565
[email protected]
Social Housing – MCU RFI
62 Lake Macdonald Drive,
Cooroy, QLD, 4563
Council Reference No: AU213016247
Our Reference No: 240444
Dear Noosa Shire Council,
With reference to the above development, we hereby respond to the Information Request dated 10 September
2025. Responses to items raised are outlined below:
Item 3 – Section Details and Relationship with Retaining Walls:
To better understand the relationship between the proposed development, retaining structures, landscaped
areas, access ramps, and adjoining properties, additional sectional drawings are required, as illustrated below.
Information Required:
3. Revise the plan package to include longitudinal sections as identified above.
Response:
Revised Civil Drawings incorporating the requested longitudinal sections have been included in the appended
documentation for review.
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Items 4 & 5 – Retaining Wall / Landscaping:
The civil plans indicate a retaining wall along sections of the proposed road elevation. Based on the location
shown in the screenshot below, it may be more appropriate for the wall to adjoin the building, allowing for
increased landscaping width in this area.
Noting the limited area for inground landscaping along the western and southern boundaries (as mentioned in
the above item) consequence of the ramps, stairs, drainage infrastructure and retaining structures, a detailed
landscaping plan is requested to be provided. This will better inform the extent of landscaping along this
elevation.
Information Required:
4. Confirm the proposed retaining wall height and advise whether it can be relocated closer to the building to
improve landscaping opportunities.
5. Provide detailed landscaping plans of suitable species within the above-mentioned constrained areas
Response:
The retaining wall is proposed to remain in its current location. Relocating the wall to adjoin the building would
significantly increase construction complexity and cost. The current offset also allows for the inclusion of
screening and landscaping to enhance privacy for the first-floor units.
Refer to the Earthworks Plan (MCU-C-201) and Longitudinal Sections (MCU-C-210 series) for retaining wall
locations and heights.
Refer to the Landscape Architect’s plans for detailed planting layouts within this area.
Items 8 & 9 – Waste:
The proposed waste collection arrangement includes a 10.2m long front loading (Custom BCC) Waste
Collection Vehicle (WCV).
The WCV Access and WCV – Standing Area & B99 Passing vehicle tracking plans (Drawing SKT-C-001 Rev
P1) show the WCV parked in different locations.
Information Required:
8. Revise plans to adopt a rear loading WCV, accessing the bin area in a reverse gear. See attached
specifications for the preferred design WCV.
9. Provide amended vehicle turning path diagrams demonstrating that a car can pass when the WCV is parked
and loading.
Response:
Revised Civil Drawings have been provided in the appendix, demonstrating a waste collection arrangement
designed to Noosa Council standards.
The drawings now show the WCV which will turn at the designated turn around at the end of the street, enter
the site in a reverse gear and drive off the site in a forward direction, and passing manoeuvres for a B99 vehicle
have been verified in the same location as the WCV access path.
28 October 2025 Page 2
Page 3
ABN 51 640 311 842
CONTACT
arcosgroup.com.au
OFFICES
Sunshine Coast | Brisbane | Gold Coast
Items 10-12 – Parking and Access:
The carpark entrance has a (reduced) isle width of 6m.
Two PWD parks have been provided, a shared area is required between the parks. The engineering plans
show line markings between the two PWDs, the architectural plans show a turnaround bay.
A B85 – PWD Parking vehicle tracking plan (Drawing SKT-C-001 Rev P1) has been provided. The plan
appears to show HRV/WCV vehicle tracking plan.
Information Required:
10. Demonstrate adequate manoeuvring for all car parks because of the reduced isle width.
11. Provide a dedicated vehicle turnaround area clear of the PWD space.
12. Clearly demonstrate appropriate PWD and HRV manoeuvring.
Response:
The revised Civil Drawings include vehicle swept paths confirming satisfactory manoeuvring for all car parking
spaces, including those adjacent to the reduced aisle width. Representative worst-case parking movements
have been demonstrated to confirm compliance without duplicating all 31 bays.
Turn paths for a HRV vehicle has been provided to confirm accessibility and circulation.
It is noted that PWD spaces are not required as part of this development – instead a turnaround bay has been
nominated.
Item 13– Earthworks:
Limited engineering details have been provided regarding the extent of earthworks required.
Information Required:
13. Provide a preliminary earthworks plan including cross sections and identify top of wall, bottom of wall.
Response:
Revised Civil Drawings have been included in the appendix, providing preliminary earthworks plan (MCU-C-
201) and earthworks sections (MCU-C-210 series).
If you have any questions, please do not hesitate to contact me on the below signed.
Kind Regards,
Principal Civil Engineer
Lachlan Swann B.Eng (Civ) (Hons), CPEng, RPEQ, NER, MIEAust
[email protected]
For and On Behalf of Arcos Group
Attachments:
- Revised Civil Drawings
28 October 2025 Page 3
Page 4
EXISTING LEGEND
SUBJECT PROPERTY BOUNDARY
4.00 MAJOR CONTOUR
MINOR CONTOUR
SEWER MAIN
WATER MAIN
STORMWATER
PROPOSED LEGEND
TW 104.20 50.00 MAJOR CONTOUR 1.0m INTERVAL
BW 103.60 MINOR CONTOUR 0.5m INTERVAL
TW 105.40
BW 104.90
4
CUT 0 - 0.5m
10
TW 105.90
BW 105.40 CUT 0.5 - 1.0m
105
TW 104.70
BW 104.20 CUT 1.0 - 1.5m
CUT 1.5 - 2.0m
TW 105.20 CUT 2.0 - 2.5m
BW 104.30
TW 105.90
BW 105.40 CUT 2.5 - 3.0m
TW 105.90 CUT 3.0 - 3.5m
BW 105.40
CUT 3.5 - 4.0m
CUT 4.0 - 4.5m
TW 105.90
BW 105.40 CUT 4.5 - 5.0m
FILL 0 - 0.5m
FILL 0.5 - 1.0m
TW 106.40 FILL 1.0 - 1.5m
BW 106.33
FILL 1.5 - 2.0m
FILL 2.0 - 2.5m
FILL 2.5 - 3.0m
C
FILL 3.0 - 3.5m
212
FILL 3.5 - 4.0m
TW 108.82
BW 107.75 FILL 4.0 - 4.5m
FILL 4.5 - 5.0m
TW 107.00
BW 105.95
TW 109.95 6
BW 109.02 10
EARTHWORKS QUANTITIES
TOP SOIL STRIP: 470m3
108 EARTHWORKS CUT: -3,156m3
EARTHWORKS FILL: 513m3
109 TW 107.74 BALANCE: -2,643m3
107 BW 107.63
TW 110.58 NOTES:
BW 110.54
1. ALL VOLUMES INDICATED ARE SOLID VOLUMES.
2. ASSUMED TOP SOIL STRIP 150mm THICK.
TW 110.91 3. EARTHWORKS QUANTITIES BASED ON COMPARISON BETWEEN
0
BW 105.95 11 TW 109.95 DESIGN SURFACE AND SURVEY SURFACE.
BW 109.39
B
211
D DEMOLITION
TW 110.43
212 TW 112.20 BW 110.38 DEMOLISH OR RELOCATE OFF SITE ALL EXISTING BUILDINGS
Filename: C:\PROJECTS\240444 - SOCIAL HOUSING - 62 LAKE MACDONALD DRIVE, COOROY\3.0 CAD\DRAWINGS\MCU\240444-MCU-C-201.DWG
BW 109.95 AND/OR STRUCTURES ON SITE AND DISCONNECT AND
WHERE REQUIRED CAP ALL ASSOCIATED SERVICES IN
ACCORDANCE WITH A PLUMBING AND DRAINAGE
TW 112.52 APPLICATION PRIOR TO DEMOLITION COMMENCING.
BW 112.50
TW 112.16
BW 109.95
CLEARING
TW 112.47 THE CONTRACTOR SHALL REMOVE ALL EXISTING
BW 112.45 VEGETATION WITHIN THE SITE IN ACCORDANCE WITH
THE APPROVED TREE RETENTION PLAN IF SPECIFIED.
A
211
Last Plotted: 2025-10-28
Last saved by: JACKHARRISON(2025-10-28)
North Point Scale Horiz. Datum Client Consultant Project Drawing
LOCAL Drawn KT Project No. Drawing No. Rev No.
COAST2BAY SOCIAL HOUSING EARTHWORKS
Design JH
HOUSING GROUP MATERIAL CHANGE OF USE - CIVIL PLAN
0m
A1 1:200
5 10
Vert. Datum
AHD
62 LAKE MCDONALD DRIVE, Check LS
240444 MCU-C-201 A
RL Datum CIVIL | STRUCTURAL | GEOTECHNICAL
COOROY, QLD, 4563 Approved Approved Date Signed Sheet
A FOR APPROVAL
Rev Revision Description
28.10.25 LS
Date Approved
COPYRIGHT © All rights reserved.
This work is copyright and cannot be reproduced
or copied in any form without the prior consent
SUNSHINE COAST | BRISBANE | GOLD COAST
www.arcosgroup.com.au | ABN 51 640 311 842
LACHLAN SWANN
RPEQ 21223
28.10.25 Status FOR APPROVAL
Size A1
Page 5
LAKE MACDONALD DRIVE FUTURE DEVELOPMENT
15.70 7.76 5.48 17.00 6.03 6.24
COMMUNAL OPEN SPACE BUILDING - A UNITS LANDSCAPE CARPARK FIRST FLOOR BUILDING SLAB LANDSCAPE
RP BDY
INDICATIVE BUILDING
CUT-OFF
2.95
DRAIN
RP BDY
1.00
RL 108.95
DESIGN SURFACE EXISTING SURFACE
3.00
BUILDING SLAB
RL 105.95 2% 2%
CONCRETE SLEEPER
RETAINING WALLS
INDICATIVE BUILDING SLAB UNITS PARKING AREA
FOOTPATH BLOCK WORK RETAINING WALL
INCORPORATED INTO STRUCTURE
SECTION A
SCALE 1:100 -
LAKE MACDONALD DRIVE FUTURE DEVELOPMENT
15.57 7.76 5.48 17.00 6.03 6.39
COMMUNAL OPEN SPACE BUILDING - A UNITS LANDSCAPE CARPARK FIRST FLOOR BUILDING SLAB LANDSCAPE
RP BDY
INDICATIVE BUILDING
1.76
CUT-OFF
DRAIN
RL 108.95
0.90
RP BDY
3.00
Filename: C:\PROJECTS\240444 - SOCIAL HOUSING - 62 LAKE MACDONALD DRIVE, COOROY\3.0 CAD\DRAWINGS\MCU\240444-MCU-C-210.DWG
BUILDING SLAB
0.50
RL 105.95 2% 2% CONCRETE SLEEPER
RETAINING WALLS
BLOCK WORK RETAINING WALL
INDICATIVE BUILDING SLAB UNITS BUILDING SLAB INCORPORATED INTO STRUCTURE
CONCRETE SLEEPER
FOOTPATH
RETAINING WALL
Last Plotted: 2025-10-28 4:25 PM
SECTION B
SCALE 1:100 201
Last saved by: JACKHARRISON(2025-10-28)
North Point Scale Horiz. Datum Client Consultant Project Drawing
LOCAL Drawn KT Project No. Drawing No. Rev No.
COAST2BAY SOCIAL HOUSING EARTHWORKS
Design JH
HOUSING GROUP MATERIAL CHANGE OF USE - CIVIL SECTIONS & DETAILS
0m
A1 1:100
2.5 5
Vert. Datum
AHD
62 LAKE MCDONALD DRIVE, Check LS
240444 MCU-C-211 A
RL Datum CIVIL | STRUCTURAL | GEOTECHNICAL COOROY, QLD, 4563 Approved Approved Date Signed Sheet
A FOR APPROVAL
Rev Revision Description
28.10.25 LS
Date Approved
COPYRIGHT © All rights reserved.
This work is copyright and cannot be reproduced
or copied in any form without the prior consent
SUNSHINE COAST | BRISBANE | GOLD COAST
www.arcosgroup.com.au | ABN 51 640 311 842
LACHLAN SWANN
RPEQ 21223
28.10.25 Status FOR APPROVAL
Size A1
Page 6
FUTURE 3.06 46.06 6.68 NEW
DEVELOPMENT LANDSCAPE PROPOSED DWELLINGS LANDSCAPE ROAD
INDICATIVE BUILDING
RP BDY
RP BDY
EXISTING SWALE
TO BE MAINTAINED EXISTING SURFACE
DESIGN SURFACE
1.09
RL 105.95 FOOTPATH
FOOTPATH
CONCRETE SLEEPER
0.50
RETAINING WALL BUILDING SLAB
EXISTING SURFACE
0.80
CONCRETE SLEEPER
RETAINING WALL
CONCRETE SLEEPER
RETAINING WALL
SECTION C
SCALE 1:100 201
FUTURE 2.30 48.02 4.05 NEW
DEVELOPMENT LANDSCAPE PROPOSED DWELLINGS LANDSCAPE ROAD
INDICATIVE BUILDING
RP BDY
EXISTING SWALE
TO BE MAINTAINED
RP BDY
1.60
DESIGN SURFACE
0.90
RL 105.95
Filename: C:\PROJECTS\240444 - SOCIAL HOUSING - 62 LAKE MACDONALD DRIVE, COOROY\3.0 CAD\DRAWINGS\MCU\240444-MCU-C-210.DWG
1.95
CAR PARKING
EXISTING SURFACE
CONCRETE SLEEPER
RETAINING WALLS
CONCRETE SLEEPER
RETAINING WALL
STORMWATER PIPE
Last Plotted: 2025-10-28 4:25 PM
SECTION D
SCALE 1:100 201
Last saved by: JACKHARRISON(2025-10-28)
North Point Scale Horiz. Datum Client Consultant Project Drawing
LOCAL Drawn KT Project No. Drawing No. Rev No.
COAST2BAY SOCIAL HOUSING EARTHWORKS
Design JH
HOUSING GROUP MATERIAL CHANGE OF USE - CIVIL SECTIONS & DETAILS
0m
A1 1:100
2.5 5
Vert. Datum
AHD
62 LAKE MCDONALD DRIVE, Check LS
240444 MCU-C-212 A
RL Datum CIVIL | STRUCTURAL | GEOTECHNICAL COOROY, QLD, 4563 Approved Approved Date Signed Sheet
A FOR APPROVAL
Rev Revision Description
28.10.25 LS
Date Approved
COPYRIGHT © All rights reserved.
This work is copyright and cannot be reproduced
or copied in any form without the prior consent
SUNSHINE COAST | BRISBANE | GOLD COAST
www.arcosgroup.com.au | ABN 51 640 311 842
LACHLAN SWANN
RPEQ 21223
28.10.25 Status FOR APPROVAL
Size A1
Page 7
PEDESTRIAN EXISTING LEGEND
1.10
ACCESS
SUBJECT PROPERTY BOUNDARY
10
4.00 MAJOR CONTOUR
1.
MINOR CONTOUR
EXISTING BIO BASIN PROVIDES SEWER MAIN
WATER QUALITY TREATMENT FOR WATER MAIN
DEVELOPMENT. REFER OPW/25/0057 STORMWATER
1.00
104
1.10
105
0
1.1
CONCRETE SLEEPER PROPOSED LEGEND
1.00 RETAINING WALL
CONCRETE DRIVEWAY CROSSOVER
OUTDOOR ALFRESCO 6.36
AREA. TYPICAL
INTERNAL CONCRETE DRIVEWAY
1.70
CONCRETE PATH
3.09
DWELLING
0 LANDSCAPE
3.0
CONNECT TO EXISTING LANDSCAPE BUFFER
PROPOSED DWELLINGS 1.10 STORMWATER PIT
FFL 105.95m RETAINING WALL
NOTES:
1. FOR GENERAL & ROADWORKS/DRIVEWAY NOTES REFER DRG C-011.
1.90
1.90
1.20
1.20
1.40
0
1.2
1.50
CONCRETE SLEEPER TURN AROUND BAY
RETAINING WALL
1.20
CONSTRUCT NEW SEWER
LIFT BRANCH AND CONNECT TO
EXISTING STRUCTURE
5.40
2%
2%
2.25
2%
2%
106
2.50
4.00
2.50 2.50 2.50
RL105.67 HEAVY DUTY (GENERAL WIDE)
CROSSOVER IN ACCORDANCE
RL105.90
6.00
WITH IPWEA STD DRG RS-051
6.20
RL105.80 RL105.42
2.50 2.50
3.50
PROPOSED OSD &
2%
2%
2%
REUSE TANK INCLUDING
BIN
2%
ORIFICE ARRANGEMENT
5.40
STORE
6x1100L BINS
MASTER WATER METER.
FINAL ARRANGEMENT AND
107 108 SIZE TO BE CONFIRMED
Filename: C:\PROJECTS\240444 - SOCIAL HOUSING - 62 LAKE MACDONALD DRIVE, COOROY\3.0 CAD\DRAWINGS\MCU\240444-MCU-C-300.DWG
BLOCK WORK RETAINING WALL
INCORPORATED INTO STRUCTURE
109
3.00
6.00
CONCRETE SLEEPER
NEW ROAD
Last Plotted: 2025-10-28 4:25 PM
RETAINING WALLS
CUT-OFF DRAIN TO CAPTURE LOW FLOWS 2.00
AND DIRECT TO STORMWATER PIT. HIGH
FLOWS BYPASS TO NEW ROAD
BUILDING SETBACK
110
Last saved by: JACKHARRISON(2025-10-23)
3.00
Ex.DN150 SEWER
North Point Scale Horiz. Datum Client Consultant Project Drawing
LOCAL Drawn KT Project No. Drawing No. Rev No.
COAST2BAY SOCIAL HOUSING DEVELOPMENT SITE
Design AK
HOUSING GROUP MATERIAL CHANGE OF USE - CIVIL PLAN
0m
A1 1:125
3.125 6.25
Vert. Datum
AHD
62 LAKE MCDONALD DRIVE, Check LS
240444 MCU-C-301 B
B COUNCIL RFI 28.10.25 LS RL Datum CIVIL | STRUCTURAL | GEOTECHNICAL COOROY, QLD, 4563 Approved Approved Date Signed Sheet
A FOR APPROVAL
Rev Revision Description
25.07.25 LS
Date Approved
COPYRIGHT © All rights reserved.
This work is copyright and cannot be reproduced
or copied in any form without the prior consent
SUNSHINE COAST | BRISBANE | GOLD COAST
www.arcosgroup.com.au | ABN 51 640 311 842
LACHLAN SWANN
RPEQ 21223
28.10.25 Status FOR APPROVAL
Size A1
Page 8
ROOF OUTLINE ABOVE
BIN AREA
BIN AREA WCV TO TURN AROUND AT
THE END OF THE ROAD
WCV ACCESS WCV - STANDING AREA & B99 PASSING
SCALE 1:125 SCALE 1:125
Filename: C:\PROJECTS\240444 - SOCIAL HOUSING - 62 LAKE MACDONALD DRIVE, COOROY\3.0 CAD\DRAWINGS\MCU\240444-SKT-C-000.DWG
BIN AREA
Last Plotted: 2025-10-28
Last saved by: JACKHARRISON(2025-10-23)
HRV ACCESS
SCALE 1:125
North Point Scale Horiz. Datum Client Consultant Project Drawing
LOCAL Drawn HD Project No. Drawing No. Rev No.
COAST2BAY SOCIAL HOUSING VEHICLE TRACKING
Design JH
HOUSING GROUP MATERIAL CHANGE OF USE - CIVIL PLAN
0m
A1 1:125
3.125 6.25
Vert. Datum
AHD
62 LAKE MCDONALD DRIVE, Check LS
240444 SKT-C-001 B
B COUNCIL RFI 28.10.25 LS RL Datum CIVIL | STRUCTURAL | GEOTECHNICAL COOROY, QLD, 4563 Approved Approved Date Signed Sheet
A FOR APPROVAL
Rev Revision Description
25.07.25 LS
Date Approved
COPYRIGHT © All rights reserved.
This work is copyright and cannot be reproduced
or copied in any form without the prior consent
SUNSHINE COAST | BRISBANE | GOLD COAST
www.arcosgroup.com.au | ABN 51 640 311 842
LACHLAN SWANN
RPEQ 21223
28.10.25 Status FOR APPROVAL
Size A1
Page 9
BIN AREA
BIN AREA
B85 - PARKING B85 - PARKING
SCALE 1:125 SCALE 1:125
TURN AROUND BAY
Filename: C:\PROJECTS\240444 - SOCIAL HOUSING - 62 LAKE MACDONALD DRIVE, COOROY\3.0 CAD\DRAWINGS\MCU\240444-SKT-C-000.DWG
BIN AREA
Last Plotted: 2025-10-28
Last saved by: JACKHARRISON(2025-10-23)
B85 - PARKING B85 - TURN AROUND BAY
SCALE 1:125 SCALE 1:125
North Point Scale Horiz. Datum Client Consultant Project Drawing
LOCAL Drawn HD Project No. Drawing No. Rev No.
COAST2BAY SOCIAL HOUSING VEHICLE TRACKING
Design JH
HOUSING GROUP MATERIAL CHANGE OF USE - CIVIL PLAN
0m
A1 1:125
3.125 6.25
Vert. Datum
AHD
62 LAKE MCDONALD DRIVE, Check LS
240444 SKT-C-002 A
RL Datum CIVIL | STRUCTURAL | GEOTECHNICAL COOROY, QLD, 4563 Approved Approved Date Signed Sheet
A FOR APPROVAL
Rev Revision Description
28.10.25 LS
Date Approved
COPYRIGHT © All rights reserved.
This work is copyright and cannot be reproduced
or copied in any form without the prior consent
SUNSHINE COAST | BRISBANE | GOLD COAST
www.arcosgroup.com.au | ABN 51 640 311 842
LACHLAN SWANN
RPEQ 21223
28.10.25 Status FOR APPROVAL
Size A1
Used in these records
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