Council archive · source document
SUPERSEDED - MCU20 0073 Approved Plans · MCU20/0073
Plans and drawings: the text below has words only, no drawings.
.
APPROVED PLAN
Par MCU20/0073
kC
res NOOSA COUNCIL
cen 7 December 2020
t .
sewer pump station
existing catch pit
ov
138°2 erhead pow
3
designers
er
9.867 '30"
146 PO Box 262
°
5.30 19'30" Noosa Heads QLD 4567
5 Telstra pit
existing banksia Mobile 0419 758 478
28.00 16 [email protected]
5.3 2°12 power pole
05 '00 and light
" www.kiddco.com.au
2m setback
for pools QBCC
This drawing is to be read in
conjunction with Engineers Drawings &
17 05
5.3
8°
Reports
04
23.66 0"
'00
'3
48°23
7
"
top of pool
1m above
29.00
finished
ground
level Construction to comply
with all relevant SAA &
BCA Codes & standard
Bldg By-law 1975 & as
amended
Verify all dimensions on
186 88
site prior to commencement
15.
°00
of any works. These
0
'00"
30.00 drawings are not to be
used for scaling
Copyright for design &
fire hydrant drawings remain the
property of the authors.
ove
rhe
ad p
27.50
owe
203°00'1
5.936
r
0"
28.00
30.00
top of pool
3m Setback 1m above
finished 28.50
ground
9m setback
5.93 00'30"
level
19°00
23.66
power pole
°
6
237
'00"
7
and light
6m setback
Driveway
existing pandanas
direction
50" 28.50 palms to be retained
to engineers detail2m setback
1 °00'
29.50 27 36
for pools 5.9
existing banksia
28.00
0'00"
289°0
94
23.0
28.00
power pole
28.50 and light
ower
29.00 ead p
water meter overh
existing banksia
existing catch pit
Telstra pit
rescent
Park C
1. SITE PLAN
SD.101 SCALE1:200
REAL PROPERTY DESCRIPTION Project
Lot: Proposed 4 Units
Parish:
Location
Address: 15&13 Park Crescent
15&13 Park Crescent
Sunshine Beach QLD 4567
Sunshine Beach
Site Area: 1121m2 Client
Mark Bain
Drawing Title
SITE PLAN
Scale Date
as shown @A3 Sept 20
Drawn By Job No:
JLK 1802
Drawing No. Issue No.
SD.101 B
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Page 2
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APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
PO Box 262
Noosa Heads QLD 4567
Telephone 07 5447 5633
Mobile 0419 758 478
[email protected]
www.kiddco.com.au
This drawing is to be read in
conjunction with Engineers Drawings &
Reports
Construction to comply
with all relevant SAA &
BCA Codes & standard
Bldg By-law 1975 & as
amended
Verify all dimensions on
site prior to commencement
of any works. These
drawings are not to be
used for scaling
Copyright for design &
drawings remain the
property of the authors.
Project
Proposed 4 Units
Location
15&13 Park Crescent
Sunshine Beach
Client
Mark Bain
Drawing Title
PERSPECTIVES
Scale Date
as shown @A3 Feb 19
Drawn By Job No:
JLK 1802
Drawing No. Issue No.
SD.102 B
Page 3
.
APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
PO Box 262
Noosa Heads QLD 4567
Telephone 07 5447 5633
Mobile 0419 758 478
[email protected]
www.kiddco.com.au
This drawing is to be read in
conjunction with Engineers Drawings &
Reports
Construction to comply
with all relevant SAA &
BCA Codes & standard
Bldg By-law 1975 & as
amended
Verify all dimensions on
site prior to commencement
of any works. These
drawings are not to be
used for scaling
Copyright for design &
drawings remain the
property of the authors.
Project
Proposed 4 Units
Location
15&13 Park Crescent
Sunshine Beach
Client
Mark Bain
Drawing Title
PERSPECTIVES
Scale Date
as shown @A3 Feb 19
Drawn By Job No:
JLK 1802
Drawing No. Issue No.
SD.103 B
Page 4
designers
PO Box 262
Noosa Heads QLD 4567
External Doors and windows to be white powder Telephone 07 5447 5633
coated aluminium framed with clear glazing infill Mobile 0419 758 478
[email protected]
www.kiddco.com.au
This drawing is to be read in
conjunction with Engineers Drawings &
White Powdercoated aluminum and glass Reports
balustrade
Construction to comply
.
with all relevant SAA &
Flyover roof with powder coated aluminium sun APPROVED PLAN BCA Codes & standard
control battens MCU20/0073 Bldg By-law 1975 & as
amended
NOOSA COUNCIL Verify all dimensions on
7 December 2020 site prior to commencement
of any works. These
.
drawings are not to be
used for scaling
Copyright for design &
drawings remain the
property of the authors.
Project
Proposed 4 Units
Location
15&13 Park Crescent
Sunshine Beach
Client
Mark Bain
Drawing Title
Rendered block wall with horizontal expressed MATERIALITY PALLET
joints to be warm white
Scale Date
as shown @A3 Feb 19
Drawn By Job No:
Travertine stone tiled balconies JLK 1802
Drawing No. Issue No.
SD.104 B
Page 5
.
APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
PO Box 262
Noosa Heads QLD 4567
Telephone 07 5447 5633
Mobile 0419 758 478
[email protected]
www.kiddco.com.au
This drawing is to be read in
conjunction with Engineers Drawings &
Reports
Construction to comply
with all relevant SAA &
BCA Codes & standard
Bldg By-law 1975 & as
amended
Verify all dimensions on
site prior to commencement
of any works. These
drawings are not to be
used for scaling
Copyright for design &
drawings remain the
property of the authors.
Project
Proposed 4 Units
Location
15&13 Park Crescent
Sunshine Beach
3D 12m HEIGHT LIMIT Client
SD.105 SCALE1:100 Mark Bain
Drawing Title
HEIGHT LIMIT
Scale Date
as shown @A3 Feb 19
Drawn By Job No:
JLK 1802
Drawing No. Issue No.
SD.105 B
Page 6
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APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
Landscaped Retaining wall,
Refer to Civil engineering for PO Box 262
Noosa Heads QLD 4567
details and specification
line Mobile 0419 758 478
of dec
k ov [email protected]
Storage er
www.kiddco.com.au
QBCC
This drawing is to be read in
line of building over conjunction with Engineers Drawings &
Reports
Garage 1
RL 26.500 lin
eo
fb
uil Construction to comply
din
g ov with all relevant SAA &
er BCA Codes & standard
Bldg By-law 1975 & as
amended
Verify all dimensions on
site prior to commencement
of any works. These
Store drawings are not to be
used for scaling
RL 26.500 Copyright for design &
drawings remain the
property of the authors.
Garage 2
RL 26.500
Store
6m Setback
RL 26.500
Storage
Visitor Parking 1
RL 26.500
UP
4
3
2
1
16
Fire
5
6
15
14 Lobby Driveway
7
Stair RL 27.500
Lift
13
8
10
12
11
9
Visitor Parking 2
RL 26.500
Storage
Garage 3 Store
RL 26.500 RL 26.500
Bin
ver
Store
ck oe
RL 26.500
of d
line
3m Setback
er
g ov
din
buil
f
eo
lin
Garage 4
RL 26.500
Project
line of building over 6m Setback Proposed 4 Units
Location
15&13 Park Crescent
Storage Sunshine Beach
Client
Mark Bain
er
line of deck ov Drawing Title
BASEMENT PLAN
Landscaped Retaining wall,
Refer to Civil engineering for Scale Date
as shown @A3 Sept 20
details and specification
Drawn By Job No:
1. BASEMENT JLK 1802
SD.201 SCALE1:100 Drawing No. Issue No.
SD.201 B
Page 7
.
B
APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
PO Box 262
Noosa Heads QLD 4567
Mobile 0419 758 478
[email protected]
www.kiddco.com.au
Deck QBCC
This drawing is to be read in
conjunction with Engineers Drawings &
Reports
Shr Deck
L Pool
Bed 1 Construction to comply
Ens 2 with all relevant SAA &
BCA Codes & standard
L Bldg By-law 1975 & as
Bed 2 amended
Verify all dimensions on
WC L site prior to commencement
robe of any works. These
drawings are not to be
Niche used for scaling
Copyright for design &
Ens 1 Shr drawings remain the
robe property of the authors.
L
F
Laundry Living
robe
Deck
Bed 3
Kitchen
Ens 3 Study
RL 29.150
7
6
5
4
3
2
1
Dining
DN
UP
L
UP
5
4
3
2
1
19
6
7
Fire 18
17
Lobby
8
Stair 16
9 15
Lift RL 29.150 BBQ
10
12
13
14
11
L
Dining DN
UP
Kitchen
7
6
5
4
3
2
1
Ens 3 Study RL 29.150
Bed 3
robe
Deck
Laundry Living
L
F
robe
Ens 1 Shr
Niche
robe
WC WC L
Pool
Bed 2
L
3m Setback
Ens 2
Bed 1
L
Shr
Project
Proposed 4 Units
Location
Deck 15&13 Park Crescent
6m Setback Sunshine Beach
Roof over Client
Mark Bain
Drawing Title
GROUND FLOOR
PLAN
Scale Date
as shown @A3 Sept 20
Drawn By Job No:
2. GROUND FLOOR JLK
Drawing No.
1802
Issue No.
SD.202 SCALE1:100
SD.202 B
Page 8
.
APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
PO Box 262
Noosa Heads QLD 4567
Mobile 0419 758 478
[email protected]
www.kiddco.com.au
QBCC
This drawing is to be read in
conjunction with Engineers Drawings &
Reports
Pool
Deck
Construction to comply
with all relevant SAA &
BCA Codes & standard
Bldg By-law 1975 & as
amended
DW
Verify all dimensions on
site prior to commencement
L of any works. These
drawings are not to be
used for scaling
Copyright for design &
Kitchen L drawings remain the
RL 32.650 Living property of the authors.
F
Laundry
Dining
W/C L
L
UP
L
5
4
3
2
1
Ens 1
20
Fire
6
19
Deck
7
18
Stair
8
17
RL 32.650
9
Lift
16
10
12
13
14
15
11
Bed 1
Study
Linen Ens 2
robe
L
robe
Ens 3 C
L
Bed 2
Bed 3
L
3m Setback L
10m setback
9m setback
Deck
Project
Proposed 4 Units
Location
6m setback
15&13 Park Crescent
Sunshine Beach
Client
Mark Bain
Drawing Title
FIRST FLOOR PLAN
Scale Date
as shown @A3 Sept 20
Drawn By Job No:
3. FIRST FLOOR JLK
Drawing No.
1802
Issue No.
SD.203 SCALE1:100
SD.203 B
Page 9
.
APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
PO Box 262
Noosa Heads QLD 4567
Mobile 0419 758 478
[email protected]
www.kiddco.com.au
QBCC
This drawing is to be read in
conjunction with Engineers Drawings &
Reports
Pool
Deck
Construction to comply
with all relevant SAA &
BCA Codes & standard
Bldg By-law 1975 & as
amended
DW
Verify all dimensions on
site prior to commencement
L of any works. These
drawings are not to be
used for scaling
Copyright for design &
Kitchen L drawings remain the
RL 36.350 Living property of the authors.
F
Laundry
Dining
L
L
DN
L
Fire Deck
Stair RL 36.350
Lift
Bed 1
Study
Linen Ens 2
robe
L
robe
Ens 3 C
L
Bed 2
Bed 3
L
3m Setback L
10m setback
9m setback
Project
Proposed 4 Units
Location
6m setback
15&13 Park Crescent
Sunshine Beach
Client
Mark Bain
Drawing Title
SECOND FLOOR
Scale Date
as shown @A3 Sept 20
Drawn By Job No:
4. SECOND FLOOR JLK
Drawing No.
1802
Issue No.
SD.204 SCALE1:100
SD.204 B
Page 10
.
APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
PO Box 262
Noosa Heads QLD 4567
Telephone 07 5447 5633
Metal Roof
Mobile 0419 758 478
[email protected]
Metal Awning www.kiddco.com.au
This drawing is to be read in
Powder Coated Aluminium conjunction with Engineers Drawings &
Framed Windows Reports
Construction to comply
with all relevant SAA &
Pastel Paint Finish to BCA Codes & standard
Rendered Block Wall Bldg By-law 1975 & as
amended
Powder Coated Aluminium Verify all dimensions on
Framed Balustrade 1.2m High site prior to commencement
of any works. These
Powder Coated Framed drawings are not to be
Aluminium Louvers used for scaling
Copyright for design &
drawings remain the
Powder Coated Aluminium property of the authors.
Framed Bifold Doors
Top of pool 1m above
finished ground level
Project
Proposed 4 Units
Location
15&13 Park Crescent
Sunshine Beach
NORTH ELEVATION Client
Mark Bain
SD.501 SCALE1:100 Drawing Title
NORTH ELEVATION
Scale Date
as shown @A3 Feb 19
Drawn By Job No:
JLK 1802
Drawing No. Issue No.
SD.501 B
Page 11
.
APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
PO Box 262
Noosa Heads QLD 4567
Metal Roof Telephone 07 5447 5633
Mobile 0419 758 478
Powder Coated Aluminium [email protected]
Framed Bifold Doors
www.kiddco.com.au
This drawing is to be read in
conjunction with Engineers Drawings &
Powder Coated Framed Reports
Aluminium Louvers
Construction to comply
Powder Coated Aluminium with all relevant SAA &
Framed Balustrade 1.2m High BCA Codes & standard
Bldg By-law 1975 & as
amended
Pastel Paint Finish to Verify all dimensions on
Rendered Block Wall site prior to commencement
of any works. These
drawings are not to be
Powder Coated Aluminium
used for scaling
Framed Windows
Copyright for design &
drawings remain the
Top of pool 1m above property of the authors.
finished ground level
Project
Proposed 4 Units
Location
15&13 Park Crescent
Sunshine Beach
EAST ELEVATION Client
Mark Bain
SD.502 SCALE1:100 Drawing Title
EAST ELEVATION
Scale Date
as shown @A3 Feb 19
Drawn By Job No:
JLK 1802
Drawing No. Issue No.
SD.502 B
Page 12
.
APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
PO Box 262
Noosa Heads QLD 4567
Telephone 07 5447 5633
Mobile 0419 758 478
[email protected]
Metal Roof
www.kiddco.com.au
Metal Awning
This drawing is to be read in
conjunction with Engineers Drawings &
Powder Coated Framed Reports
Aluminium Louvers
Construction to comply
Powder Coated Aluminium with all relevant SAA &
Framed Balustrade 1.2m High BCA Codes & standard
Bldg By-law 1975 & as
amended
Verify all dimensions on
Metal Awning site prior to commencement
of any works. These
Powder Coated Aluminium
drawings are not to be
Framed Bifold Doors
used for scaling
Powder Coated Aluminium Copyright for design &
Framed Windows drawings remain the
property of the authors.
Top of pool 1m above
finished ground level
Project
Proposed 4 Units
Location
15&13 Park Crescent
Sunshine Beach
SOUTH ELEVATION Client
Mark Bain
SD.503 SCALE1:100 Drawing Title
SOUTH ELEVATION
Scale Date
as shown @A3 Feb 19
Drawn By Job No:
JLK 1802
Drawing No. Issue No.
SD.503 B
Page 13
.
APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
PO Box 262
Noosa Heads QLD 4567
Telephone 07 5447 5633
Mobile 0419 758 478
Metal Roof
[email protected]
www.kiddco.com.au
Metal Awning This drawing is to be read in
conjunction with Engineers Drawings &
Powder Coated Aluminium Reports
Framed Windows
Construction to comply
Pastel Paint Finish to with all relevant SAA &
Rendered Block Wall BCA Codes & standard
Bldg By-law 1975 & as
amended
Verify all dimensions on
Powder Coated Aluminium
site prior to commencement
Framed Balustrade 1.2m High
of any works. These
drawings are not to be
Powder Coated Aluminium used for scaling
Framed Bifold Doors Copyright for design &
drawings remain the
Fire door property of the authors.
Project
Proposed 4 Units
Line of Building Location
15&13 Park Crescent
Sunshine Beach
Client
Mark Bain
Drawing Title
WEST ELEVATION WEST ELEVATION
SD.504 SCALE1:100 Scale Date
as shown @A3 Feb 19
Drawn By Job No:
JLK 1802
Drawing No. Issue No.
SD.504 B
Page 14
.
APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
Boundary line
Fall 12m height limit PO Box 262
Noosa Heads QLD 4567
40,050 Roof RL
Telephone 07 5447 5633
Mobile 0419 758 478
39,800 Second Floor Ceiling RL
[email protected]
3,700
www.kiddco.com.au
3,450
This drawing is to be read in
conjunction with Engineers Drawings &
Reports
36,350 Second Floor RL
Construction to comply
with all relevant SAA &
250
36,100 First Floor Ceiling RL BCA Codes & standard
Bldg By-law 1975 & as
amended
3,700
Verify all dimensions on
3,450
site prior to commencement
of any works. These
drawings are not to be
used for scaling
Copyright for design &
32,650 First Floor RL
drawings remain the
property of the authors.
250
32,400 Ground Floor Ceiling RL
3,500
3,250
29,150 Ground Floor RL
866
250
28,900 Basement Ceiling RL NGL
2,650
2,400
26,500 Basement RL Project
Proposed 4 Units
250
Location
15&13 Park Crescent
A Sunshine Beach
Client
SD.601 SCALE1:100
Mark Bain
Drawing Title
SECTION A
Scale Date
as shown @A3 Feb 19
Drawn By Job No:
JLK 1802
Drawing No. Issue No.
SD.601 B
Page 15
.
APPROVED PLAN
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
designers
12 Height
PO Box 262
Noosa Heads QLD 4567
40,050 Roof RL
Telephone 07 5447 5633
Mobile 0419 758 478
39,800 Second Floor Ceiling RL
[email protected]
3,700
www.kiddco.com.au
This drawing is to be read in
conjunction with Engineers Drawings &
Reports
36,350 Second Floor RL
Construction to comply
with all relevant SAA &
36,100 First Floor Ceiling RL BCA Codes & standard
Bldg By-law 1975 & as
amended
3,700
Verify all dimensions on
site prior to commencement
of any works. These
drawings are not to be
used for scaling
Copyright for design &
32,650 First Floor RL
drawings remain the
property of the authors.
32,400 Ground Floor Ceiling RL
3,500
29,150 Ground Floor RL
937
28,900 Basement Ceiling RL NGL
2,650
26,500 (Basement) Project
Proposed 4 Units
Location
15&13 Park Crescent
B Sunshine Beach
Client
SD.602 SCALE1:100
Mark Bain
Drawing Title
SECTION B
Scale Date
as shown @A3 Feb 19
Drawn By Job No:
JLK 1802
Drawing No. Issue No.
SD.602 B
Page 16
.
REFERENCE DOCUMENT
MCU20/0073
NOOSA COUNCIL
7 December 2020
.
WORKING FOR YOUR PROJECTS SUCCESS
SLOPE STABILITY ASSESSMENT
Address : 13 & 15 Park Crescent
Sunshine Beach
Client : Mark Bain Constructions
Date : 24 September 2020
Report No : 30206(SL)
Document Set ID: 21300072
Version: 1, Version Date: 19/11/2020
Page 17
INTRODUCTION
SCG Consulting Engineers have been commissioned to provide a Slope Stability Assessment for the above
allotment. The assessment considers only the existing state of the allotment and any possible effects that the
proposed works will have on this site.
The proposed works are detailed by Kidd & Co Designers in plans 1802 drawings SD.101 thru to SD.602 dated
February 2020 and consists of multi level units with basement carparking.
SITE DESCRIPTION
A desk top study of the site confirms the following:-
- The site is located within an area on the Noosa Council’s Landslip Hazard Map 1.3 (5 November 2010).
- Reference to the Australian Geological Map 1:100000 Gympie Special confirms the site is located within
the Pleistocene Dune of the late Quaternary period, consisting of Quartz Sand.
- Reference to Sunmap 1:25000 topographic maps confirm the site is located on the Sunshine Beach
Primary Dune.
- Level contours provided on the proposed building plans indicate an average fall across the site of 5-10%.
Maximum grades in the order of 20º occur outside the eastern boundary of the site within the road reserve.
The soil profile for the site consists of the following –
: LOOSE SILTY SANDS INCREASING IN DENSITY WITH DEPTH
Our walkover confirmed the following characteristics-
Site Slope : A visual assessment of the surface grades within the allotment using a hand held
inclometer suggests grades in the order of 5-10% exist across the proposed
construction site. The surface grades within the road reserve increase to 20%. The
measured grades are consistent with the contours indicated on the proposed
construction plans.
Vegetations : Vegetation consists of grasses and scattered trees.
Drainage : The surface drainage is good, sub-surface drainage is good. There was no
indication of ground water seepage or rising water pressure.
Earthworks : Several building platforms exist across the site.
Adjacent Structures : Adjacent structures on the neighbouring properties appear to consist of slab on
ground construction.
Evidence of previous :
Soil Movements None evident.
LANDSLIP MECHANISMS
Landslip is generally defined as the movement of a mass of rock or soil down a slope.
It is generally considered to occur when the strength of the soil or rock mass to support itself is exceeded causing
movement to occur within the mass.
SCG Consulting Engineers 2 SCG Ref: 30206(SL)
Document Set ID: 21300072
Version: 1, Version Date: 19/11/2020
Page 18
This loss of strength can occur as a result of numerous circumstances. These include, but are not limited to the
following:-
- Siesmic Activity
- Erosions effects such as wind or fluid scour
- Soil Saturation from rainfall events or defective drainage measures
- Construction/Earthworks activities
- Groundwater variations/movements
- Previous Landslips
The nature of landslips vary with site specific conditions and failure mechanisms that cause the slips to occur.
Appendix B provides some diagrammatic examples of various landslips.
The speed of landslips can vary greatly from millimetres per year to a number of meters in a matter of minutes.
Once again this characteristic is governed by site specific conditions and the failure mechanism causing the slip
to occur.
The allotment is situated within a massive aeolian sand bed of Quaternary age. As a general observation dunal
horizons such as these are stable where;
- The natural slope is less than the angle of repose for sand (30°)
- Vegetation exists to protect from wind generated scour
- The drainage pattern is such that there is no risk of fluvial scour.
These horizons can become unstable when aeolian or fluvial scour erode slopes to angles greater than 30°,
particularly when coincident with vegetation removal.
LANDSLIP HAZARD ASSESSMENT
For our assessment we utilize the Guidelines For Landslip Risk Management Framework as provided by the
Australian Geomechanics Society, in their journal of March 2007. Descriptions used by this framework can be
found appended to this report.
Using the Qualitive Risk Analysis Matrix (refer appendix) we have established the following characteristics for the
allotment.
Landslip Mechanism : Translational or Rotational Flow
We consider a potential landslip mechanism will consist of either a Rotational or Translational Landslide or Creep
movement within the sloping profile. Diagramation representation of these mechanisms are appended to this
report. We are of the opinion that this movement could occur within the loose sand profile.
Likelihood of Landslip : Possible
This is due to the evidence during our site visit which includes the surface grade within the allotment and the
earthworks for the proposed construction.
Consequences to Property : Minor
With these factors considered we classify the allotment as:-
LOW RISK OF LANDSLIP
This assessment does not preclude construction from occurring on the allotment but suggests that measures
must be implemented in the design and construction to mitigate the identified risks.
Such measures are discussed in the following section.
HAZARD MITAGATION – CONSTRUCTION RECOMMENDATIONS
We consider the primary risks for landslip occurring within this allotment is over excavation or, stormwater scour
and vegetation removal.
SCG Consulting Engineers 3 SCG Ref: 30206(SL)
Document Set ID: 21300072
Version: 1, Version Date: 19/11/2020
Page 19
The construction of any cut/fill platforms within the site can lead to an increased risk of landslip.
Any over excavated (steep) cuts may lead to landslip. Similarly, steep fill batters may be susceptible to slip or
erosion.
Any exposed fill batters are susceptible to weakening from saturating rains and stormwater scour. This risk is
compounded, where poor compaction is achieved when placing the fill. Any fill batter profiles should be limited
to a maximum grade of 1 to 3 (vertical to horizontal). Where possible the fill platform should be benched into the
natural profile after the removal of all organic material including topsoils. The fill material should be placed and
compacted to achieve a minimum relative field density of 95%. Surface stormwater runoff should be diverted
around fill batters. Vegetating the fill batter can improve the batters ability to resist slip and or scour. Where
these recommendations are unachievable, benching, shoring or retaining measures should be implemented.
Any permanent exposed cut batters should be limited to a maximum slope of 1 to 2.5 (vertical to horizontal). The
face should be protected from stormwater scour with cut off drains above the cut. Catch drains should also be
provided along the base of the cut. The drains must dissipate all stormwater from above and below the cut.
Vegetating the cut batter can improve the batters ability to resist slip and scour. Steeper batters should be
retained with engineer designed retaining walls.
All excavations both temporary and permanent must be adequately battered or retained to prevent collapse.
Temporary excavations for retaining walls can have exposed cut batters of 1 to 1.7 (vertical to horizontal) taken
from the base of the excavation. These earthworks must incorporate shallow surface spoon drains at the base
and along the high side of the cut. Drains must have an efficient outflow down-slope and clear of the construction
area. Any exposed soil face should also be protected against the potential for stormwater erosion. Saturation of
the exposed cut batter from prolonged rainfall will potentially de-stabilise the cut batter. Programming of the
works must consider this possibility. Temporary backfilling of the slope may be required. Should these
recommendations be un-achievable the builder should seek guidance from this office on temporary shoring,
benching or other suitable techniques.
All earthworks should be constructed in accordance with AS3798-1996 ‘Guidelines on earthworks for commercial
and residential developments’ and sound engineering theory.
The builder must ensure the stability of neighbouring structures is maintained through not undermining
their foundations. This is achieved via restricting any earthworks to above a line radiating downwards
at an angle of 1 in 1.7 (vertical to horizontal) from the base of the foundation/structure to be protected.
Retaining walls for landscaping purposes would need to be constructed with consideration of maintaining stability
of the surrounding ground during construction. Such measures would include limiting the slope of any excavations
to a slope of 1 vertical to 2 horizontal and protecting the works against stormwater scour. The retaining wall
designs must allow for the lateral soil pressures expected including additional surcharging from sloping backfills.
Although we consider the allotment stable in its current form there will always be a risk of landslip under severe
stormwater conditions.
Measures that will reduce this risk include the following but are not limited to.
The finished ground surface should be leveled and graded to ensure no concentration of stormwater runoff
leading to ground scour can occur.
Any collected stormwater from areas other than the roof should be disposed of downslope from the proposed
dwelling and should also ensure no ground scour can occur.
All stormwater runoff from hard landscaped areas should be directed around the perimeter of the house and
contained within the site via diversion bunding, scour proof drains and field inlets. Stormwater runoff from roofed
areas should be disposed of via piping to the road reserve via approved kerb adaptors.
All existing cross allotment flows from neighbouring properties must also be considered, managed and
maintained. Clear unhindered drainage paths must be provided and maintained during and beyond construction.
All constructed retaining walls must have effective drainage measures upslope and beyond the walls to relieve
any sub-surface water pressure/build-up. These drains must be maintained and flushed out regularly. To achieve
this we recommend bringing the upstream end of the drain to surface and capping off to allow future flush out.
SCG Consulting Engineers 4 SCG Ref: 30206(SL)
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We have attached guidelines for hillside construction extracted from Australian Geomechanics vol. 35 March
2000 – “Landslide Risk Management”. These references provide commentary on good design and building
practice.
We trust this meets with your requirements, however should you have any queries on the above matter please
contact the undersigned.
Yours faithfully
Sean Richardson RPEQ 5835
For and on behalf of
SCG CONSULTING ENGINEERS
Encs Appendix A - Some Guidelines for Hillside Construction
Appendix B - Landslip Mechanisms
Appendix C - Landslip Risk Assessment Matrix
SCG Consulting Engineers 5 SCG Ref: 30206(SL)
Document Set ID: 21300072
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APPENDICES
A. SOME GUIDELINES FOR HILLSIDE CONSTRUCTION
B. LANDSLIP MECHANISMS
C. LANDSLIP RISK ASSESSMENT MATRIX
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PRACTICE NOTE GUIDELINES FOR LANDSLIDE RISK MANAGEMENT 2007
APPENDIX A - SOME GUIDELINES FOR HILLSIDE CONSTRUCTION
GOOD ENGINEERING PRACTICE POOR ENGINEERING PRACTICE
ADVICE
GEOTECHNICAL Obtain advice from a qualified, experienced geotechnical practitioner at early Prepare detailed plan and start site works before
ASSESSMENT stage of planning and before site works. geotechnical advice.
PLANNING
SITE PLANNING Having obtained geotechnical advice, plan the development with the risk Plan development without regard for the Risk.
arising from the identified hazards and consequences in mind.
DESIGN AND CONSTRUCTION
Use flexible structures which incorporate properly designed brickwork, timber Floor plans which require extensive cutting and
or steel frames, timber or panel cladding. filling.
HOUSE DESIGN
Consider use of split levels. Movement intolerant structures.
Use decks for recreational areas where appropriate.
SITE CLEARING Retain natural vegetation wherever practicable. Indiscriminately clear the site.
ACCESS & Satisfy requirements below for cuts, fills, retaining walls and drainage. Excavate and fill for site access before
DRIVEWAYS Council specifications for grades may need to be modified. geotechnical advice.
Driveways and parking areas may need to be fully supported on piers.
EARTHWORKS Retain natural contours wherever possible. Indiscriminatory bulk earthworks.
Minimise depth. Large scale cuts and benching.
CUTS Support with engineered retaining walls or batter to appropriate slope. Unsupported cuts.
Provide drainage measures and erosion control. Ignore drainage requirements
Minimise height. Loose or poorly compacted fill, which if it fails,
Strip vegetation and topsoil and key into natural slopes prior to filling. may flow a considerable distance including
Use clean fill materials and compact to engineering standards. onto property below.
FILLS Batter to appropriate slope or support with engineered retaining wall. Block natural drainage lines.
Provide surface drainage and appropriate subsurface drainage. Fill over existing vegetation and topsoil.
Include stumps, trees, vegetation, topsoil,
boulders, building rubble etc in fill.
ROCK OUTCROPS Remove or stabilise boulders which may have unacceptable risk. Disturb or undercut detached blocks or
& BOULDERS Support rock faces where necessary. boulders.
Engineer design to resist applied soil and water forces. Construct a structurally inadequate wall such as
Found on rock where practicable. sandstone flagging, brick or unreinforced
RETAINING
Provide subsurface drainage within wall backfill and surface drainage on slope blockwork.
WALLS
above. Lack of subsurface drains and weepholes.
Construct wall as soon as possible after cut/fill operation.
Found within rock where practicable. Found on topsoil, loose fill, detached boulders
Use rows of piers or strip footings oriented up and down slope. or undercut cliffs.
FOOTINGS
Design for lateral creep pressures if necessary.
Backfill footing excavations to exclude ingress of surface water.
Engineer designed.
Support on piers to rock where practicable.
SWIMMING POOLS Provide with under-drainage and gravity drain outlet where practicable.
Design for high soil pressures which may develop on uphill side whilst there
may be little or no lateral support on downhill side.
DRAINAGE
Provide at tops of cut and fill slopes. Discharge at top of fills and cuts.
Discharge to street drainage or natural water courses. Allow water to pond on bench areas.
SURFACE Provide general falls to prevent blockage by siltation and incorporate silt traps.
Line to minimise infiltration and make flexible where possible.
Special structures to dissipate energy at changes of slope and/or direction.
Provide filter around subsurface drain. Discharge roof runoff into absorption trenches.
Provide drain behind retaining walls.
SUBSURFACE
Use flexible pipelines with access for maintenance.
Prevent inflow of surface water.
Usually requires pump-out or mains sewer systems; absorption trenches may Discharge sullage directly onto and into slopes.
SEPTIC &
be possible in some areas if risk is acceptable. Use absorption trenches without consideration
SULLAGE
Storage tanks should be water-tight and adequately founded. of landslide risk.
EROSION Control erosion as this may lead to instability. Failure to observe earthworks and drainage
CONTROL & Revegetate cleared area. recommendations when landscaping.
LANDSCAPING
DRAWINGS AND SITE VISITS DURING CONSTRUCTION
DRAWINGS Building Application drawings should be viewed by geotechnical consultant
SITE VISITS Site Visits by consultant may be appropriate during construction/
INSPECTION AND MAINTENANCE BY OWNER
OWNER’S Clean drainage systems; repair broken joints in drains and leaks in supply
RESPONSIBILITY pipes.
Where structural distress is evident see advice.
If seepage observed, determine causes or seek advice on consequences.
Australian Geomechanics Vol 42 No 1 March 2007 113
Form
Document No.
Set ID:68029 RL2 August 2010
21300072
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PRACTICE NOTE GUIDELINES FOR LANDSLIDE RISK MANAGEMENT 2007
114 Australian Geomechanics Vol 42 No 1 March 2007
Document Set No.
Form ID: 21300072
68029 RL2 August 2010
Version: 1, Version Date: 19/11/2020
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APPENDIX B
PRACTICE NOTE GUIDELINES FOR LANDSLIDE RISK MANAGEMENT 2007
Australian Geomechanics Vol 42 No 1 March 2007
Document Set ID: 21300072
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PRACTICE NOTE GUIDELINES FOR LANDSLIDE RISK MANAGEMENT 2007
APPENDIX C: LANDSLIDE RISK ASSESSMENT
QUALITATIVE TERMINOLOGY FOR USE IN ASSESSING RISK TO PROPERTY
QUALITATIVE MEASURES OF LIKELIHOOD
Approximate Annual Probability
Implied Indicative Landslide
Description Descriptor Level
Indicative Notional Recurrence Interval
Value Boundary
10-1 5x10-2
10 years The event is expected to occur over the design life. ALMOST CERTAIN A
-2
20 years The event will probably occur under adverse conditions over the
10 100 years
design life.
LIKELY B
-3
-3 5x10 200 years
10 1000 years The event could occur under adverse conditions over the design life. POSSIBLE C
5x10-4 2000 years
-4 The event might occur under very adverse circumstances over the
10 10,000 years
design life.
UNLIKELY D
5x10-5 20,000 years
10-5 100,000 years
The event is conceivable but only under exceptional circumstances
RARE E
over the design life.
-6 5x10-6 200,000 years
10 1,000,000 years The event is inconceivable or fanciful over the design life. BARELY CREDIBLE F
Note: (1) The table should be used from left to right; use Approximate Annual Probability or Description to assign Descriptor, not vice versa.
QUALITATIVE MEASURES OF CONSEQUENCES TO PROPERTY
Approximate Cost of Damage
Description Descriptor Level
Indicative Notional
Value Boundary
Structure(s) completely destroyed and/or large scale damage requiring major engineering works for
200% CATASTROPHIC 1
stabilisation. Could cause at least one adjacent property major consequence damage.
100%
Extensive damage to most of structure, and/or extending beyond site boundaries requiring significant
60% MAJOR 2
stabilisation works. Could cause at least one adjacent property medium consequence damage.
40%
Moderate damage to some of structure, and/or significant part of site requiring large stabilisation works.
20% MEDIUM 3
Could cause at least one adjacent property minor consequence damage.
10%
5% 1% Limited damage to part of structure, and/or part of site requiring some reinstatement stabilisation works. MINOR 4
Little damage. (Note for high probability event (Almost Certain), this category may be subdivided at a
0.5% INSIGNIFICANT 5
notional boundary of 0.1%. See Risk Matrix.)
Notes: (2) The Approximate Cost of Damage is expressed as a percentage of market value, being the cost of the improved value of the unaffected property which includes the land plus the
unaffected structures.
(3) The Approximate Cost is to be an estimate of the direct cost of the damage, such as the cost of reinstatement of the damaged portion of the property (land plus structures), stabilisation
works required to render the site to tolerable risk level for the landslide which has occurred and professional design fees, and consequential costs such as legal fees, temporary
accommodation. It does not include additional stabilisation works to address other landslides which may affect the property.
(4) The table should be used from left to right; use Approximate Cost of Damage or Description to assign Descriptor, not vice versa
Australian Geomechanics Vol 42 No 1 March 2007
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PRACTICE NOTE GUIDELINES FOR LANDSLIDE RISK MANAGEMENT 2007
APPENDIX C: – QUALITATIVE TERMINOLOGY FOR USE IN ASSESSING RISK TO PROPERTY (CONTINUED)
QUALITATIVE RISK ANALYSIS MATRIX – LEVEL OF RISK TO PROPERTY
LIKELIHOOD CONSEQUENCES TO PROPERTY (With Indicative Approximate Cost of Damage)
Indicative Value of 1: CATASTROPHIC 2: MAJOR 3: MEDIUM 4: MINOR 5:
Approximate Annual 200% 60% 20% 5% INSIGNIFICANT
Probability 0.5%
A – ALMOST CERTAIN 10-1 VH VH VH H M or L (5)
B - LIKELY 10-2 VH VH H M L
C - POSSIBLE 10-3 VH H M M VL
D - UNLIKELY 10-4 H M L L VL
E - RARE 10-5 M L L VL VL
F - BARELY CREDIBLE 10-6 L VL VL VL VL
Notes: (5) For Cell A5, may be subdivided such that a consequence of less than 0.1% is Low Risk.
(6) When considering a risk assessment it must be clearly stated whether it is for existing conditions or with risk control measures which may not be implemented at the current
time.
RISK LEVEL IMPLICATIONS
Risk Level Example Implications (7)
Unacceptable without treatment. Extensive detailed investigation and research, planning and implementation of treatment
VH VERY HIGH RISK options essential to reduce risk to Low; may be too expensive and not practical. Work likely to cost more than value of the
property.
Unacceptable without treatment. Detailed investigation, planning and implementation of treatment options required to reduce
H HIGH RISK
risk to Low. Work would cost a substantial sum in relation to the value of the property.
May be tolerated in certain circumstances (subject to regulator’s approval) but requires investigation, planning and
M MODERATE RISK implementation of treatment options to reduce the risk to Low. Treatment options to reduce to Low risk should be
implemented as soon as practicable.
Usually acceptable to regulators. Where treatment has been required to reduce the risk to this level, ongoing maintenance is
L LOW RISK
required.
VL VERY LOW RISK Acceptable. Manage by normal slope maintenance procedures.
Note: (7) The implications for a particular situation are to be determined by all parties to the risk assessment and may depend on the nature of the property at risk; these are only given as a
general guide.
Australian Geomechanics Vol 42 No 1 March 2007
Document Set ID: 21300072
Version: 1, Version Date: 19/11/2020
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