Council archive · source document
A6107 Lot9 Stormwater Management Plan (RevB) June 2022 · OPW22/0166
Plans and drawings: the text below has words only, no drawings.
Original PDF page 1, section 1. The text section number identifies this passage in the reader.
STORMWATER
MANAGEMENT PLAN
Proposed Residential Development
at
Lots 9 Serenity Close,
Noosa Heads
for Cape Bouvard Developments Pty Ltd
a6107/l9/SWMP/Rev B
Jun 2022
SH/PL
Prepared by Brah101 Pty Ltd Trading As Alta Projects ABN 91 611 354 511
Civil and Structural Engineering
Project Management
26 Memorial Avenue
P. O. Box 559
Cotton Tree, Queensland, 4558
Telephone: (07) 5475 4125
Facsimile: (07) 5479 1607
e-mail: [email protected]
The content of this document is provided in strict commercial confidence. The content of this
document shall not be disclosed to any third party, without the express written authority of
Brah101 Pty Ltd t/as Alta Projects..
Document Control
Revision A6107/L9/SWMP/RevB - Authorised for Issue
Author Signature
No. Date Reviewer Signature Document Status
a Aug 2021 Steven Harrison Steven Harrison A
B June 2022 Steven Harrison Steven Harrison A
R - Revision F - Final A - Approval P - Preliminary
See the original
The page text is free to read. Viewing or downloading an original file needs an account.
Log in to see the originalFull text of sections 2 to 13 (of 31)
Section 2
- Contents - 1.0 INTRODUCTION ......................................................................................... 1 2.0 EXISTING CONDITIONS ........................................................................... 2 3.0 PROPOSED DEVELOPMENT .................................................................... 2 4.0 STORMWATER TREATMENT & DISPOSAL ....................................... 3 5.0 RAPID INFILTRATION PITS (RIP’s) ....................................................... 4 6.0 CALCULATIONS .......................................................................................... 4 APPENDICES APPENDIX A – Engineering Drawings APPENDIX B – RIP Management & Maintenance Plan APPENDIX C – Prototype RIP Test Results APPENDIX D – Spreadsheet Model Results APPENDIX E – Detail Survey
Section 3
1.0 INTRODUCTION
This report is lodged in support of a Operational Works application to Noosa
Council seeking to develop residential unit buildings at Lot 9 SP195871,
Serenity Close, Noosa Heads.
The proposed development represents the fourth stage of residential unit
buildings developed by Cape Bouvard over the greater Settlers Cove site with
Alta Projects’ engineers having completed stormwater design, inspection and
certification for all previous stages.
Design solutions presented in this report are consistent with those previously
adopted with minor refinements borne of experience.
1. In particular, this report addresses stormwater management issues
raised, at conditions 41 to 45 of Minor Change Decision Notice
132008.175.03 dated 11 November 2021.
41. A stormwater management plan shall be prepared by a RPEQ,
specialising in stormwater and water quality management incorporating the
principles of the Environmental Management Plan for the Settlers Cove
Development (23118 DA), that demonstrates water
reuse strategies, infrastructure capacity and effective treatment methodology.
The use of rainwater harvesting tanks for irrigation purposes shall be
incorporated in the overall design plans. These plans shall be submitted to
Council for approval prior to obtaining a
Development Permit for Operational Works.
` 42. Roof runoff from any new building should be directed to a rainwater
storage system or tank (minimum 23,000 litres) that is installed to ensure
water from the rainwater storage system or tank is used for external uses
(such as watering gardens, irrigation, ornamental ponds, water features,
topping-up swimming pools, outdoor cleaning, etc) and for internal (ground
floor) use in washing machine cold taps and toilet cisterns. All rainwater tanks
are to be designed and installed in accordance with the approved Stormwater
and Water Quality Management Plan and the Queensland Development
Code (QDC) current at the time of building approval, and shall be part of the
plumbing application for approval. The location and capacity of the tanks shall
be clearly shown on the plans submitted for Building Works/Operational
Works approval and any overflow shall be directed to the stormwater
drainage system.
43. All stormwater drainage shall be collected on site and discharged so there
is no net increase in stormwater runoff from the site.
44. To ensure that polluted run-off does not enter the water table, the
adjoining waterways or Council’s stormwater drainage system, stormwater
run-off from the car parking areas and the driveways shall have the first flush
(the first 12mm of rainfall or hose-down) collected in
__________________________________________________________________________
A6107/L9/SMP/RevB/Jun 2022 Page 1 of 7
SH/pl
Brah101 Pty Ltd t/as ALTA PROJECTS
Section 4
a grease/oil arrestor/gross pollutant trap provided on site prior to being
permitted to discharge into the larger drainage system. All other clean
stormwater, such as roof water, can be collected on site and discharged
through a single underground drain line directly into the existing drainage
system, bypassing the grease/oil arrestor/gross pollutant trap. To this end, a
detailed maintenance plan shall be prepared for the proposed grease/oil
arrestors/gross pollutant trap, which shall be submitted to the Council for
approval prior to obtaining a Development Permit for Operational Works. The
approved maintenance plan shall be incorporated in the Community
Management Scheme for the development and a copy of this shall be
provided for Council’s records prior to commencement of the approved Use.
A Development Permit for Building Works shall not be granted until a
Development Permit for Operational Works has been issued in regard to the
drainage scheme.
45. All site stormwater drainage shall be by means of a gravity system.
2.0 EXISTING CONDITIONS
The subject site is currently undeveloped and generally supports only grasses
and sucker regrowth.
The site falls at moderate grades away from a ridge near Serenity Close
towards Private Open Space for Conservation and Waterway Protection
(POSCWP) areas to the west.
An existing boulder retaining wall along the sites western boundary separates
the development site from POSCWP areas and the adjacent access pathway to
Noosa Inlet.
The entire site consists of loose, poorly graded dune sand and as such
contains no defined overland drainage paths since rainwater infiltrates
directly through the permeable surface.
Refer detail survey at Appendix E.
3.0 PROPOSED DEVELOPMENT
The proposed development is to consist of two (2) multi storey residential
buildings with a basement carparking under and a shared driveway
arrangement. Each building is to be surrounded by extensive terraced
landscape areas, both hard and soft.
__________________________________________________________________________
A6107/L9/SMP/RevB/Jun 2022 Page 2 of 7
SH/pl
Brah101 Pty Ltd t/as ALTA PROJECTS
Section 5
4.0 STORMWATER TREATMENT & DISPOSAL
Treatment and disposal of runoff will be carried out in accordance with the
approved document Settlers Cove Noosa Residential High Density Environmental
Management Plan (EMP 1) by WBM Oceanics Australia.
Alta Projects engineers (formally TATE) were involved in formulation of the
overarching development approval document and EMP1 produced by WBM
Oceanics.
EMP1 recognises in particular the regimes of stormwater runoff and
infiltration which existed over the broader RHD site pre-development.
Essentially it was recognised that the RHD site lies atop a dune of poorly
graded sand with particularly high rainfall infiltration rates. As such the
natural state sees all rainfall for events up to 10 year ARI infiltrate the dune
close to where it lands and replenish the water table below with little or no
runoff.
The standing water table forms a profile similar to the shape of the dune,
albeit at a depressed scale and emerges as seepage flows adjacent Noosa inlet
at or about RL 5.0m.
The zone between RL 5.0m and the inlet was recognised as having
particularly high ecological values, supporting numerous stands of swamp
mahogany and various species of fauna. Critically it was recognised that
these ecological values were dependant on maintenance of the natural
hydrogeological regime and no nett reduction in rainwater infiltration post-
development.
Consequently, and in order to counteract the effect of significant impervious
areas being constructed, the design approach will see stormwater runoff from
roofs and hardstand areas, up to 100-year ARI infiltrated into the natural
sands via a series of Rapid Infiltration Pits (RIPs) in order to achieve no net
reduction in rainwater infiltration and no net increase in stormwater runoff.
Carpark areas at the top of the vehicular access ramp will be passed through a
Fox BPT600 GPT/oil arrester to remove oils and hydrocarbons prior to
infiltration. The Fox unit will require regular servicing and maintenance by
the building’s body corporate as part of the building’s Community
Management Scheme (Refer drawings at Appendix A and Maintenance plan
at Appendix B). Notably the balance area of driveway ramp totalling 127m2
will be collected via a grate at the base of the ramp and directed untreated to
downstream RIPs for infiltration. Given the transient nature of vehicles on the
ramp and the minor volumes of runoff in play this is not considered to pose
__________________________________________________________________________
A6107/L9/SMP/RevB/Jun 2022 Page 3 of 7
SH/pl
Brah101 Pty Ltd t/as ALTA PROJECTS
Section 6
any significant risk to RIP function, groundwater quality or water quality in
the POSCW and surrounding areas.
Main roofed areas from both buildings will drain to a Rainwater Harvesting
Tank of 80,000 litre capacity with captured runoff utilized for landscape
irrigation. Tank overflow will be directed to catchment specific RIPs.
Runoff from main landscaped areas will be intercepted and conveyed via a
landscaped swale located along the site’s western boundary to a series of RIPs
and shallow landscaped basin at the south-western corner of the site.
RIPs will be aggregated within the basin and flows greater than the 1% AEP
major design event will be directed toward the POSCWP as dispersed sheet
flow via a broad weir.
Refer to engineering drawings at Appendix A for details.
5.0 RAPID INFILTRATION PITS (RIP’s)
RIPs consist of a bottomless stormwater pit which promotes infiltration
through its base.
Crushed rock and multiple layers of geofabric and “sacrificial sand” are
installed at the base of the RIP to protect against clogging of dune sands
below.
RIPs are subject to routine inspection and maintenance by the building’s body
corporate as part of the building’s Community Management Scheme and such
maintenance is critical to their ongoing function. (Refer Maintenance Schedule
at Appendix B).
RIPs have been installed on all previous stages of Settlers Cove and proven to
work very well.
Refer engineering drawings at Appendix A for RIP details.
6.0 CALCULATIONS
6.1 RIP Infiltration (100year ARI events)
__________________________________________________________________________
A6107/L9/SMP/RevB/Jun 2022 Page 4 of 7
SH/pl
Brah101 Pty Ltd t/as ALTA PROJECTS
Section 7
Alta Projects engineers (formally Tate) were involved in
formulation of the over-arching development approval
document and EMP1.
Such involvement included construction of a prototype RIP on
the Settlers Cove site and field testing to determine infiltration
rates. Results were consistent indicating a liner relationship
between driving head and infiltration rate such that:
Infiltration Rate (mm/s) = 4mm/sec + 13.6 x head (m)
Refer to Appendix C for prototype test results.
In order to model the operation of the RIP’s, a spreadsheet has
been developed and utilised for all previous stages of Settlers
Cove.
Temporal patterns for Zone 3 from the Australian Rainfall and
Runoff, Volume 2 were applied. These temporal patterns were
used in conjunction with the average rainfall intensities for the
Noosa region to create a series of design storms of varying
duration for a 100-year average return interval (ARI).
Temporal patterns were converted to flow rates by breaking
each storm event into a series of short duration storms. A
triangular flow verses time approximation was used for each
sub storm with sub storm flows then added to produce flow Vs
time for RIP inflow.
Outflow and water depth were then calculated through
iterations for the duration of the storm based on the infiltration
rate / head relationship discussed above. A factor of safety of
2.0 was applied to the observed prototype infiltration rate. Each
RIP was then sized to prevent overtopping in a 100-year ARI
storm event of any duration.
Spreadsheet model results for each building are attached in
Appendix D.
6.2 Emergency Overflow (>100year ARI events)
Emergency overflow, for events (>Q100) which cannot be
wholly infiltrated by RIPs, is to be directed to the POSCWP area
__________________________________________________________________________
A6107/L9/SMP/RevB/Jun 2022 Page 5 of 7
SH/pl
Brah101 Pty Ltd t/as ALTA PROJECTS
Section 8
as controlled sheet flow at velocities/depths which will not
induce significant scouring.
In order to achieve this outcome RIP’s are to be aggregated in
discrete basins adjacent the POSCWP areas and behind existing
boulder retaining walls. Stone pitched weirs 3m long and at a
constant height 0.2m below surrounding bunded area will
control emergency overflow into the POSCW. The rough nature
of the stone pitching will also provide an “energy dissipation”
effect.
The following calculations demonstrate adequacy for lot 9: -
Running the RIP spreadsheet for 100year ARI storm of 5-minute
duration we note the following (refer Appendix D)
Qi (max) = 355 L/s at 5-minutes.
We also note that this corresponds with an available head of
3.2m (weir height above base of RIP’s) and an infiltration rate
through the RIP’s of: -
Maximum discharge outflow Qo (2.77m) = 245 L/s
Hence emergency overflow via the weir will not engage for
events <Q100 and will be contained within the designated RIP
system.
__________________________________________________________________________
A6107/L9/SMP/RevB/Jun 2022 Page 6 of 7
SH/pl
Brah101 Pty Ltd t/as ALTA PROJECTS
Section 9
A
Appendix
Engineering Drawings
[OCR of page images]
Engineering Drawings
Section 10
D 10
W
SP195871
E
S m
ET
W
95 t N
P1 D
ALL WORKS TO BE CARRIED OUT IN STRICT
13
87 ACCORDANCE WITH APPROVED SETTLERS
1 MH D COVE NOOSA RESIDENTIAL HIGH DENSITY
W
W
T ENVIRONMENTAL MANAGEMENT PLAN (EMP1)
MH E S
W DATED 21 JULY 2005 BY WBM OCEANICS.
D
S E
E
S
W
NOTE:
14
S
S D
S
E
Em - REFER TO HYDRAULIC CONSULTANT'S
SP1 t S DETAILS FOR ALL DOWNPIPE &
13
S
958 P STORMWATER CONNECTIONS
71 MH
S
(PLUMBING & DRAINAGE APPROVAL).
11
MH - ALL NEW BUILDING ROOFS TO BE PIPED
D TO RAINWATER HARVESTING TANKS
10
FOR EVENTS UP TO 100 YEAR ARI VIA
12
PROPOSED STORMWATER PIT SEALED PIPED NETWORK
WITH FOX GPT 'BPT600' LOCATION - RWH TANK OVERFLOW TO BE PIPED TO
X
TO DISCHARGE TO PIT 1/2. REFER 1 SOUTH RIPs VIA SEALED PIPE NETWORK
8
TO HYDRAULIC CONSULTANTS 4 FOR EVENTS UP TO 100 YEAR ARI
DETAILS - ALL BASEMENT & CARPARK
15
X
STORMWATER TO BE COLLECTED IN A
9
1 SUMP & PUMPED TO DISCHARGE OVER
2 A "FOX BPT600" GROSS POLLUTANT
X
TRAP PRIOR TO CONNECTION TO R.I.P.'S.
PROPOSED STRIP DRAIN TO BASEMENT & CARPARK DRAINAGE SUMP
CONNECT TO PIT 1/1 . REFER & PUMP DETAILS TO HYDRAULIC
14
X
HYDRAULIC CONSULTANTS CONSULTANT'S SPECIFICATIONS.
100 DRAWINGS FOR DETAILS
ALL ROOFWATER TO BE SIZED
FOR Q100 EVENT AND 605 - ALL HARDSTAND AREAS MUST ONLY
13
DISCHARGE TO RIPs AND MUST NOT
SP305332 DISCHARGE TO 80kL RAINWATER
X
00
SP195871 DISCHARGE TO RAINWATER
Ø3
11
13
HARVESTING TANK VIA SEALED HARVESTING TANK
PIPE NETWORK
00
Ø3
10
X
1
1
12
7
2
2
X
Ø2
25
8
0 0
Ø3
12
X
L9 (SOUTH)
UP
9
4437m²
X
2
1 9 2
4
SP195871
X
75 LEGEND
12 Ø3
X
22 A
11
|
PROPOSED 80kL RAINWATER
65
| |
| | PROPOSED STORMWATER DRAINAGE
| | HARVESTING TANK. TANK
RP mt
12
10
| |
OVERFLOW PIPE TO CONNECT
EX
| |
SEALED ROOFWATER PIPE NETWORK
20
| |
TO RIP VIA SEALED PIPE
14.0
|
|
| | NETWORK PROPOSED VEGETATED SWALE
7
| |
00
| |
X
3
13
Ø3
| |
|
1
|
| 12
PROPOSED OVERLAND FLOW PATH
8
Ø3
14
X
75
13
X PROPOSED BASEMENT WALL
10
9
X
14
X
150 ROCK & BIDIM BETWEEN | | | | | | | | | | | | | |
PROPOSED TOP OF BATTER
X T1
3 WALL AND EXISTING PATHWAY. PROPOSED TOE OF BATTER
X 3 > > >
4 REFER DETAIL D02
X
PROPOSED SWALE
X 606
> >
FLO NC ROUT IDE
Ø300
FINISHED SURFACE CONTOUR
W Y (> ED
X
IR 00)
OV ER T G m W
5
SP195871
9.0
> > X
WE Q1
OUT
RL
EM MEN ED 3
EXISTING SURFACE CONTOUR
m
00
X 4
11
12
> > 4
1.0
Ø|3
HABITAT PROTECTION FENCE TO BE ERECTED
CE POS
1
||
10
OUT EXISTING ELECTRICAL RETICULATION
PRIOR TO COMMENCEMENT OF CLEARING WORKS VEGETATED SWALE X > > E
ER GE
||
X6
O
1 PR
PROVIDE SIGNAGE AT 50m SPACINGS " ECOLOGICAL EXISTING TELSTRA RETICULATION
||
X > > > Ø375
T
||
RESTORATION AREA - NO ACCESS
E > > > | | | | | | | | | | | | | D EXISTING STORMWATER DRAINAGE
|
| |
X | |
|
X
| | |
7
|
9 8 W EXISTING WATER RETICULATION
CO SP195871 X X X X X X X
N S EXISTING SEWER RETICULATION
ARE SERV
m
BUND RL9.25MIN
A (P ATIO
1.0
OS
CW N CEMENT GROUT BACK OF
P) EXISTING BOULDER RETAINING PROPOSED RAPID INFILTRATION
WALL (REFER DETAIL). REFER PITS 5 OFF @ 1800dia x 1.8m DEEP.
DETAIL D02 REFER DETAIL. SL8.75 0 4 8 12 16 20m
SCALE 1:200 A1, 1:400 A3
NOTE: ONLY DRAWINGS MARKED "FOR CONSTRUCTION" AND BEARING AN ORIGINAL SIGNATURE SHALL BE USED FOR CONSTRUCTION Design:
PURPOSES.
PBL PROJECT: DRAWING TITLE:
Brah 101 pty ltd t/a Alta Projects
Drawn: PBL
A.B.N. 91 611 354 511 DRAINAGE LAYOUT
FOR APPROVAL Date: JUNE 2021 26 Memorial Avenue, Cotton Tree PROPOSED RESIDENTIAL DEVELOPMENT LOT 9
NOT FOR CONSTRUCTION PO Box 559, Cotton Tree, QLD, 4558 Revision Sheet
Checked:. . . . . . . . . . .
Tel (07) 5475 4125 Fax (07) 5479 1607 at SERENITY CLOSE, NOOSA DRAWING No:
A6107/22/L9/D01 A 1 of 1
STEVEN HARRISON
Email: [email protected]
A 20/06/2022 ISSUE FOR APPROVAL PBL S.H.
.......................
DIRECTOR APPROVAL Datum AHD
Web: http://www.alta.net.au for CAPE BOUVARD DEVELOPMENTS
REV DATE DESCRIPTION BY CHKD RPEQ - 4784 A1 SHEET SIZE Council
FILENAME : a6107-22-L9-D01.dwg - DATE : 20/6/22 - 12:50pm - XREF's: X-BASE; X-ARCH LOWER GROUND; X-ARCH UPPER GROUND; X-ARCH STG4B LANDSCAPE; X-ARCH STG4B LANDSCAPE LEVELS; X-ARCH STG4B LEVEL1; X-SURVEY; X-LANDSCAPE UPPER; X-LANDSCAPE LOWER; Ref:
X-ARCH STG4B BASEMENT; H-Approved-SH; H-Checked-SH
Section 11
CONSERVATION AREA
POSCWP BOUNDARY
PROPOSED 3m WIDE EXISTING WALL/EARTH BUND
EMERGENCY (>Q100) HEIGHT VARIES
OVERFLOW WEIR RL9.05 RL9.25 MIN 900sq TYPE B GALVANISED RL9.25
GRATE FIX WITH 2/M12 S/S
RL9.05
BOLTS.
CEMENT BROUT EMERGENCY 1 RL8.85
RL8.75 1
300 100
OVERFLOW WEIR & BACK OF 2 2
EXISTING BOULDER RETAINING 100
WALL. REFER PLAN D01 FOR
EXTENT CONVERTOR SLAB & RISER TO
EXISTING RETAINING WALL MANUFACTURERS SPEC.
NEW BIDIM A14 GEOFABRIC TO
TEMPORARY CB15 PLATFORM
BACK OF EXISTING BOULDER
1800 DIA RCP (2)
RETAINING WALL
300Ø HDPE BALANCE
STEP IRONS IN ACCORDANCE PIPE LAID FLAT
WITH AUSTRALIAN STANDARDS
2400
REMOVABLE BIDIM A14
GEOFABRIC FILTER.
150Ø ROCK SPALLS OVER WEIGHT WITH ROCK
1000
BIDIM A14 FABRIC x 5m LONG SPALLS.
AT OVERFLOW WEIR
EXISTING CONCRETE PATH 100
HEIGHT VARIES
RL6.2 TO RL9.25
IL 5.85
300
75mm BASALT ROCKSPALLS
CLEAN COARSE SAND FILTER WRAPPED IN BIDIM A14
GEOFABRIC
RAPID INFILTRATION PIT
5 OFF
NOTE: ONLY DRAWINGS MARKED "FOR CONSTRUCTION" AND BEARING AN ORIGINAL SIGNATURE SHALL BE USED FOR CONSTRUCTION Design:
PURPOSES.
PBL PROJECT: DRAWING TITLE:
Brah 101 pty ltd t/a Alta Projects
Drawn: PBL
A.B.N. 91 611 354 511 RAPID INFILTRATION PIT DETAILS (RIP)
FOR APPROVAL Date: JUNE 2021 26 Memorial Avenue, Cotton Tree PROPOSED RESIDENTIAL DEVELOPMENT LOT 9
NOT FOR CONSTRUCTION PO Box 559, Cotton Tree, QLD, 4558 Revision Sheet
Checked:. . . . . . . . . . .
Tel (07) 5475 4125 Fax (07) 5479 1607 at SERENITY CLOSE, NOOSA DRAWING No:
A6107/22/L9/D02 A 2 of
STEVEN HARRISON
Email: [email protected]
A 20/06/2022 ISSUE FOR APPROVAL PBL S.H.
.......................
DIRECTOR APPROVAL Datum AHD
Web: http://www.alta.net.au for CAPE BOUVARD DEVELOPMENTS
REV DATE DESCRIPTION BY CHKD RPEQ - 4784 A1 SHEET SIZE FILENAME : a6107-22-L9-D02.dwg - DATE : 20/6/22 - 12:49pm - XREF's: H-Approved-SH; H-Checked-SH Council Ref:
Section 12
OUT/1
STRUCTURE
OUT/4
OUT/4
T1/3
1/1
1/2
2/1
2/1
3/1
4/1
1/4
2/2
2/4
3/4
NAME
RAINWATER TANK OVERFLOW TO
RAPID INFILTRATION PIT
900x900 GRATED PIT
900x900 GRATED PIT
900x900 GRATED PIT
900x900 GRATED PIT
900x900 GRATED PIT
900x900 GRATED PIT
900x900 GRATED PIT
900x900 GRATED PIT
900x900 GRATED PIT
900x900 GRATED PIT
STRUCTURE
OUTLET TO RAPID
OUTLET TO RAPID
OUTLET TO RAPID
INFILTRATION PITS
INFILTRATION PITS
INFILTRATION PITS
CLASS 'D' GRATE
CLASS 'D' GRATE
CLASS 'D' GRATE
CLASS 'D' GRATE
CLASS 'D' GRATE
CLASS 'D' GRATE
CLASS 'B' GRATE
CLASS 'B' GRATE
CLASS 'B' GRATE
CLASS 'B' GRATE
DESCRIPTION
ALL LIDS/GRATES TO
BE BOLT DOWN TYPE
PUMP ROOM
MAXIMUM DEPTHS PROPOSED Ø300 TANK
OUTLET. PROVIDE 2x 45deg
INTERNAL MAXIMUM uPVC BENDS TO DIVERT
DIMENSIONS DEPTH OUTLET UNDER POOL AREA
450 x 450 < 600
600 x 600 > 600 <900
900 x 600 >900 <1200
900 x 900 >1200
PIPE SIZEmm (Class) 300(2) 300(2) 225(2) 375(2) 375(2) 375(2) 300(2) 300(2) 300(2) 300(2)
PIPE GRADE % 0.50% 0.50% 0.50% 0.50% 2.32% 7.45% 0.50% 0.50% 0.50% 17.34%
PIPE SLOPE 1 in X 200.00 200.00 200.00 200.00 43.06 13.43 200.00 200.00 200.00 5.77
FULL PIPE FLOW VEL. (m/s) 1.16 1.16 0.43 0.90 1.04 1.47 0.98 1.30 1.64 2.26
PART FULL FLOW VEL. (m/s) 2.32 3.92 5.37
(1.65 1y) (2.75 1y) (5.37 1y)
DATUM RL -4.0
HYDRAULIC
10.000
10.241
10.768
9.811
9.671
9.761
9.671
9.615
9.060
8.661
9.920
9.680
9.680
8.250
9.037
8.902
8.250
9.794
9.695
9.493
8.845
8.737
8.434
8.324
8.632
GRADE LEVEL
PIPE FLOW 0.082 0.082 0.018 0.099 0.114 0.163 0.070 0.092 0.116 0.160
(Cumecs)
1.010
1.106
1.000
1.006
1.154
1.174
1.030
0.931
1.026
1.708
1.250
0.500
1.262
1.282
0.850
1.724
1.728
0.250
2.204
2.224
DEPTH TO INVERT
INVERT LEVEL
9.118
8.000
9.300
9.138
7.851
7.500
9.700
8.500
8.490
8.470
9.469
9.394
9.374
9.294
9.246
9.226
7.692
7.672
7.546
7.526
OF DRAIN
DESIGN SURFACE
10.400
10.400
10.400
10.300
10.400
10.400
10.200
9.500
9.400
8.850
9.750
8.750
8.750
9.575
LEVEL
N= 7080591.068
N= 7080579.722
N= 7080569.617
N= 7080583.647
N= 7080569.617
N= 7080558.339
N= 7080536.476
N= 7080537.591
N= 7080594.897
N= 7080567.015
N= 7080544.380
N= 7080540.014
N= 7080546.907
N= 7080540.014
E= 508452.194
E= 508442.270
E= 508430.079
E= 508422.596
E= 508430.079
E= 508416.641
E= 508432.586
E= 508438.798
E= 508479.017
E= 508463.752
E= 508452.452
E= 508449.631
E= 508450.240
E= 508449.631
STRUCTURE SETOUT
COORDINATES
(Easting/Northing))
RUNNING
15.073
30.908
10.760
28.303
55.364
61.675
31.788
57.087
62.285
6.920
0.000
0.000
0.000
0.000
15.073 15.835 10.760 17.543 27.061 6.311 31.788 25.299 5.198 6.920
CHAINAGE
LINE 2 1 4 3 0 20 40 60 80 100m
HORIZONTAL SCALE
1:1000 A1, 1:2000 A3
VERTICAL SCALE
0 2 4 6 8 10m
1:100 A1, 1:200 A3
NOTE: ONLY DRAWINGS MARKED "FOR CONSTRUCTION" AND BEARING AN ORIGINAL SIGNATURE SHALL BE USED FOR CONSTRUCTION Design:
PURPOSES.
PBL PROJECT: DRAWING TITLE:
Brah 101 pty ltd t/a Alta Projects
Drawn: PBL
A.B.N. 91 611 354 511 DRAINAGE LONGITUDINAL SECTIONS
FOR APPROVAL Date: JUNE 2021 26 Memorial Avenue, Cotton Tree PROPOSED RESIDENTIAL DEVELOPMENT LOT 9
NOT FOR CONSTRUCTION PO Box 559, Cotton Tree, QLD, 4558 Revision Sheet
Checked:. . . . . . . . . . .
Tel (07) 5475 4125 Fax (07) 5479 1607 at SERENITY CLOSE, NOOSA DRAWING No:
A6107/22/L9/D03 A 3 of
STEVEN HARRISON
Email: [email protected]
A 20/06/2022 ISSUE FOR APPROVAL PBL S.H.
.......................
DIRECTOR APPROVAL Datum AHD
Web: http://www.alta.net.au for CAPE BOUVARD DEVELOPMENTS
REV DATE DESCRIPTION BY CHKD RPEQ - 4784 A1 SHEET SIZE FILENAME : a6107-22-L9-D03 LONG SECTIONS.dwg - DATE : 20/6/22 - 12:49pm - XREF's: H-Approved-SH; H-Checked-SH Council Ref:
Section 13
W
SP195871
E
9
W
.5
E
T
S m
1 12
SEDIMENT & EROSION CONTROL NOTES
63
.8
P1 t D
12
.
12
95 N
2
2 .5
X
87 1. ALL SEDIMENT & EROSION CONTROL DEVICES ARE TO BE INSTALLED IN
.512
98
1
12
.
12
MH X D ACCORDANCE WITH THE I E AUST SOIL EROSION & SEDIMENT CONTROL
W
W
X
T X MANUAL, AS DETAILED ON THIS PLAN, OR AS REQUIRED FOR COMPLIANCE
8
E S
3
MH
WITH THE REQUIREMENTS OF THE ENVIRONMENTAL MANAGEMENT PLAN.
.1
.4
13
12
3
474
.2
.17.
W
13
X D
11
9
3
4
.6
TEMPORARY SITE
.5
.0
S 2. THE CONTRACTOR IS RESPONSIBLE FOR ENSURING SEDIMENT & EROSION
8
13
X
13
E
14
.2
REFER TO DRAWING #04
E
2
13
6
CONSTRUCTION X
.9
X S
.2
5 CONTROL DEVICES ARE INSPECTED & MAINTAINED AS FOLLOWS:
13
.6
3
13
W
0
.3
10
.7
S
13
ENTRY/EXIT
13
S X D (A) DURING CONSTRUCTION
S
E
2
Em
.5
9
REFER DETAIL ESC02
.1
(i) DAILY DURING DRY WEATHER
13
X
4
12
5
SP1 t S
7
.4
17
5
X
9.
X S
X
.5
13
958 P
(ii) PRIOR TO PREDICTED STORM EVENTS
9.
14
6
.1
7
14
.1
X X (iii) TWICE DAILY DURING PROLONGED RAIN
11
9
71
5
.9
.9
24
13
12
MH
8.
S
(iv) DURING AND AFTER MAJOR STORM EVENTS
6
53
.7
0
8.
9
.1
13
MH X
.8
5
X
58
13
(B) DURING DEFECTS LIABILITY PERIOD
.4
7
14
9.
.8
13
D
5
X 7.90
2
13
.8
.6
52
(i) WEEKLY DURING DRY WEATHER
11
14
7.
56
>
(ii) PRIOR TO PREDICTED STORM EVENTS
7.
6
9
.9
.9
5
X
13
12
.6
76
8
(iii) TWICE WEEKLY DURING PROLONGED RAIN
.7
10
3
8
9.
.3
.0
13
>
4
14
94
PROPOSED PIT
X
15
5
.2
9. (iv) DURING AND AFTER MAJOR STORM EVENTS
.6
12
2
3
13
X
.4
.2
5
PROTECTION.
.2
13
14
>
11
40
5
0
.8
X
.1
REFER DETAIL
9.
13
3. THE CONTRACTOR IS TO CONSTRUCT AN ENTRY/EXIT SEDIMENT TRAP AS
15
2
7
.1
.2
>
DRG The text continues on section 14.
Used in these records
A6107 Lot9 Stormwater Management Plan (RevB) June 2022.pdfRelated documentApplication case desk ↗
About this file
- File size
- 6.6 MB (large file)
- File type
No other editions are linked here.
Original file
Log in to download the original file
The download may take up to a minute.