3000- Lot 7 & 8 SMP - June 2018 · OPW18/0155

Page 2

                           - Contents -


1.0   INTRODUCTION ...................................................... 1
2.0   EXISTING CONDITIONS .......................................... 2
3.0   PROPOSED DEVELOPMENT ..................................... 2
4.0   STORMWATER TREATMENT & DISPOSAL ............... 2
5.0   RAPID INFILTRATION PITS (RIP’s) ........................... 3
6.0   CALCULATIONS ...................................................... 3




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

Page 3

1.0    INTRODUCTION

This report is lodged in support of an operational works application to Noosa
Council seeking to develop residential unit buildings at Lots 7 & 8 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.

In particular, this report addresses stormwater management issues raised, at
conditions 33 to 37 of Material Change of Use Decision Notice
MCU16/0143.01 dated 22 May 2018.

            33.   All stormwater drainage shall be collected on site and discharged so
                  there is no net increase in stormwater runoff from the site.

            34.   Stormwater runoff from the development must be disposed of on-
                  site without causing scour or damage to the subject site or any
                  adjoining property.
                  The works must be undertaken in accordance with an
                  Operational Works approval and must include in particular a
                  drainage system generally in accordance with the approved
                  Environmental Management Plan for the Settlers Cove
                  development.
            35.   On site swale drains will be required to capture and direct
                  any overland stormwater runoff to the Infiltration Pits
                  proposed on site. These swales shall be sized to carry a 3-
                  month storm event and plans detailing their capacity,
                  location, length, width and grades shall be submitted to
                  Council for approval.
            36.   All site stormwater drainage shall be by means of a gravity system.
            37.   Plans of the entire on-site drainage design must be prepared by a
                  Registered Professional Civil Engineer and submitted to Council prior to
                  obtaining a Development Permit for Operational Works.




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S3000/ST4/SMP/June 2018                                                             Page 1 of 3
SH/tk
                           Brah101 Pty Ltd t/as ALTA PROJECTS

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2.0

3.0    EXISTING CONDITIONS

The subject site is currently undeveloped other than remnant hardstand and
sediment basin areas left after construction of previous stages.

The site falls at moderate grades away from a ridge near Serenity Close
towards Ecological Restoration areas to the west.

Other than one large gum tree the site generally supports only grasses and
small sucker regrowth. A number of smaller trees surround the site’s
perimeter. Trees which need to be retained have been indicated by the
landscape architect and will be appropriately protected as per arborist’s
instructions.

The entire site consists of loose, poorly graded dunal sand and as such
contains no overland drainage paths since rainwater infiltrates directly
through the permeable surface.

Refer detail survey at Appendix E.

4.0    PROPOSED DEVELOPMENT

The proposed development is to consist of two (2) multi storey residential
buildings with basement carparking under each and shared driveway
arrangements. Each building is to be surrounded by extensive terraced
landscape areas, both hard and soft.

For the purpose of engineering design, the buildings are referred to as stages
4A and 4B although it is intended that they will be constructed essentially in
one continuous process with Building 4A to be handed over whilst 4B is
completed.


5.0    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.

This approach will see stormwater runoff from roofs and hardstand areas
infiltrated into the natural sands via a series of Rapid Infiltration Pits (RIPs) in
order to achieve no net reduction in rainwater infiltrating the sand dunes
beneath the site.

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S3000/ST4/SMP/June 2018                                                       Page 2 of 3
SH/tk
                          Brah101 Pty Ltd t/as ALTA PROJECTS

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Driveway and carpark areas will be passed through a Fox BPT grease/oil
arrester to remove oils and hydrocarbons prior to infiltration.

Main roofed areas will drain to a Rainwater Harvesting Tank in each building
with captured runoff utilized for landscape irrigation. Tank overflow will be
directed to catchment specific RIPs.

Runoff from main landscaped areas will be intercepted by an earth berm
located along the site’s western boundary and conveyed via a landscaped
swale to a series of RIPs and shallow landscaped basin for each building. RIPs
will be aggregated within the basin and flows greater than the design event
will be directed toward the Ecological Restoration Area as dispersed sheet
flow via a broad weir.

Similar arrangements will apply for minor building and landscaped areas
adjacent Serenity Close although flows greater than the design event will
surcharge toward the roadway formation.

Refer to engineering drawings at Appendix A for details.

6.0    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 (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.

7.0    CALCULATIONS

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


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S3000/ST4/SMP/June 2018                                                      Page 3 of 3
SH/tk
                          Brah101 Pty Ltd t/as ALTA PROJECTS

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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 10-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 substorm with substorm 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 10-year ARI storm event of any duration.

Spreadsheet model results for each building are attached in Appendix D.




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S3000/ST4/SMP/June 2018                                                      Page 4 of 3
SH/tk
                          Brah101 Pty Ltd t/as ALTA PROJECTS

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                A
                Appendix




Engineering Drawings


[OCR of page images]
Engineering Drawings

 

Page 8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

      

 

 

 

900sq TYPE B GALVANISED 900sq TYPE B GALVANISED
GRATE FIX WITH 2/M12 S/S GRATE FIX WITH 2/M12 S/S
BOLTS. BOLTS.
RL17.0 (NOM) RL14.9 (NOM)
v Vv
L I ill I
— || [f00 S| foo 8
s 3
CONVERTOR SLAB & RISER TO
MANUFACTURERS SPEC.
1800 DIA RCP (2)
g REMOVABLE BIDIM A14
= GEOFABRIC FILTER
WEIGHT WITH ROCK 1800 DIA RCP (2)
SPALLS, e
3 g
s i: aq
bo IO _* cod
REMOVABLE BIDIM A14
e GEOFABRIC FILTER.
8 WEIGHT WITH ROCK
SPALLS
s
CLEAN COARSE SAND FILTER' 75mm BASALT ROCKSPALLS bo — komen 4 |
WRAPPED IN BIDIM A14 : = :
GEOFABRIC \ s
s
RAPID INFILTRATION PIT
4A (EAST) 1 OFF CLEAN COARSE SAND FILTER 75mm BASALT ROCKSPALLS

WRAPPED IN BIDIM A14
GEOFABRIC

RAPID INFILTRATION PIT
4B (EAST) 1 OFF

CONVERTOR SLAB & RISER TO
MANUFACTURERS SPEC.

NOTES:

ALL RAPID INFILTRATION PITS TO BE LOCATED IN AREAS WITH 3m MINIMUM
DEPTH OF AOLEAN (DUNE) SAND.

LOCATION TO BE DETERMINED BY FURTHER GEOTECHNICAL TESTING AT
OPERATIONAL WORKS APPLICATION STAGE.

0 04 08 1.2 16 2.0m

Ait

SCALE 1:20 A1, 1:40 A3

 

NOTE: ONLY DRAWINGS MARKED "FOR CONSTRUCTION" AND BEARING AN ORIGINAL SIGNATURE SHALL BE USED FOR CONSTRUCTION PURPOSES.

 

DIRECTOR APPROVAL

 

 

Rev | DATE DESCRIPTION BY | CHKD RPEQ- 4784

 

 

 

 

 

Design: PBL
Drawn: PBL
Date: MAY 2016

Checked

  

|ALTA

ENGINEERING : DESIGN : MANAGEMENT

 

 

Datum _AHD

Brah 101 pty Itd t/a Alta Projects
ABN. 91 611 354511

26 Memorial Avenue, Cotton Tree

PO Box 559, Cotton Tree, QLD, 4558
Tel (07) 5475 4125 Fax (07) 5479 1607
Email: [email protected]

Web: http://www.alta.net.au

 

 

A‘ SHEET SIZE

 

FILENAME :96107-18-PSMP03.dug -DATE: 2216/18-4:00om - XREF': H-Approved-SH; H-Checked-SH

 

PROJECT:

DRAWING TITLE:
STORMWATER MANAGEMENT PLAN DETAILS

PROPOSED RESIDENTIAL DEVELOPMENT STAGE 4A &4B | gueer2oF2

at SERENITY CLOSE, NOOSA
for CAPE BOUVARD DEVELOPMENTS

 

 

 

DRAWING N Revision Sheet
Jo:
A6107/18/PSMP03 2 of 2
© This plan is Copyright. Other then for the purposes of end subject to fhe conditions prescribed wnder Ae
Copyright Act, ao part of it may in any form or by any means (electronic, anechanieal, mycro copying, photo

 

Council Ref: de directed to ALTA Projects.

 

copsing, recording or otherwise) be reproduced, stored in a retrieval system or transmitted without the prior
wnitten permission of ALTA Projects. all intellectual property remains within ALTA Projects, all enquiries should

 

Page 9

| 03m.

6.0m

 

PROPERTY BOUNDARY

EMERGENCY OVERFLOW
(CEMENT GROUT)

EXRL8.0

ex STING SURFACE —

 

PROPOSED RETAINING WALL
TYPE RW3. TO BE CONSTRUCTED
A PART OF STAGE 4A P1

WEIR RL8.70

   
 
  
  
 

900sq TYPE B GALVANISED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TOW RL9.0
GRATE FIX WITH 2/M12 SIS
BOLTS oe
fp et at siss0
7 oe 3
" J CONVERTOR SLAB & RISER TO
a MANUFACTURERS SPEC.
a
1800 DIA RCP (2)
3
g

REMOVABLE BIDIM A14 3000 HDPE BALANCE PIPE

GEOFABRIC FILTER Lj

WEIGHT WITH ROCK

SPALLS
s {fe

g
lOO ___ IOs _ aod 56

3
8

 

 

 

CLEAN COARSE SAND FILTER

  

75mm BASALT ROCKSPALLS
WRAPPED IN BIDIM A14
GEOFABRIC

RAPID INFILTRATION PIT
4A (WEST) 5 OFF

6.0m

 

 

PROPERTY BOUNDARY

EMERGENCY OVERFLOW
(CEMENT GROUT)

EXRLB.0
ce

EXISTING SURFACE

PROPOSED RETAINING WALL

TYPE RW3. TO BE CONSTRUCTED
APART OF STAGE 4A P1.

 
 
  
 

   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

     

   

RL9.0 —
TOW RL9.0 900sq TYPE B GALVANISED _ _
GRATE FIX WITH 2/M12 S/S oo
BOLTS. _-
WEIR RL8.70 auie |
—— Isl gpt't.s0 1
Sy 2
HTT 100. 2
ES CONVERTOR SLAB & RISER TO
a MANUFACTURERS SPEC.
S 1800 DIA RCP (2)
a
g
Z|
“ REMOVABLE BIDIM A14 3002 HOPE BALANCE PIPE
GEOFABRIC FILTER. Jee
WEIGHT WITH ROCK
SPALLS.
e| po NV
_ ~od
2
CLEAN COARSE SAND FILTER 75mm BASALT ROCKSPALLS
WRAPPED IN BIDIM A14
GEOFABRIC
RAPID INFILTRATION PIT
4B (WEST) 3 OFF
0 04 08 1.2 16 2.0m

Ait

SCALE 1:20 A1, 1:40 A3

 

NOTE: ONLY DRAWINGS MARKED "FOR CONSTRUCTION" AND BEARING AN ORIGINAL SIGNATURE SHALL BE USED FOR CONSTRUCTION PURPOSES.

 

 

 

Rev | DATE DESCRIPTION

 

 

 

BY

CHKD

 

 

 

DIRECTOR APPROVAL
RPEQ- 4784

    

 

Design: PBL
Drawn: PBL
Date: MAY 2016
Checked - | ENGINEERING :; DESIGN : MANAGEMENT
Datum AHD

Brah 101 pty Itd t/a Alta Projects
ABN. 91 611 354511

26 Memorial Avenue, Cotton Tree

PO Box 559, Cotton Tree, QLD, 4558
Tel (07) 5475 4125 Fax (07) 5479 1607
Email: [email protected]

Web: http://www.alta.net.au

 

 

A‘ SHEET SIZE

FILENAME : 96107-18-PSMP02.dug -DATE: 2216/18-4:00om - XREF': H-Approved-SH; H-Checked-SH

 

 

PROJECT:

PROPOSED RESIDENTIAL DEVELOPMENT STAGE 4A & 4B

at SERENITY CLOSE, NOOSA
for CAPE BOUVARD DEVELOPMENTS

DRAWING TITLE:
STORMWATER MANAGEMENT PLAN DETAILS
SHEET 1 OF 2

 

 

 

Council Ref:

 

DRAWING N Revision Sheet
Jo:
A6107/18/PSMP02 1 of 2
© This plan is Copyright. Other then for the purposes of end sulject to ke conditions prescribed under Ae
Copyright Act, ao part of it may in any form or by any means (electronic, anechanieal, mycro copying, photo

copsing, recording or otherwise) be reproduced, stored in a retrieval system or transmitted without the prior
wnitten permission of ALTA Projects. all intellectual property remains within ALTA Projects, all enquiries should
be directed to ALTA Projects.

 

 

Page 10

|
HABITAT PROTECTION FENCE TO BE
ERECTED PRIOR TO COMMENCEMENT
OF CLEARING WORKS PROVIDE SIGNAGE

    

PROPOSED STAGE 4A
RAPID INFILTRATION
PIT (WEST) 5 OFF @
1800dia x 2.4m DEEP
REFER DETAIL

 

 
   
     

 
   
 
 
  

   

oy rs

peer

 

   
    

   

   
 
 

 

 

 

 

   
  

PROPOSED
RAINWATER J
HARVESTING]
TANK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

   
 
  
 
 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

   
     
   
   
   
     
   
 

  
     
   
  
 
 
 
  
  
  
 

 
 
  
 

 
 
 

  

 

 

 

  
 

 

 

ALL WORKS TO BE CARRIED OUT IN STRICT
ACCORDANCE WITH APPROVED SETTLERS
COVE NOOSA RESIDENTIAL HIGH DENSITY
ENVIRONMENTAL MANAGEMENT PLAN (EMP1)
DATED 21 JULY 2005 BY WBM OCEANICS.

 

 

 

 

 

NOTE:
- REFER TO HYDRAULIC CONSULTANT'S.

DETAILS FOR ALL DOWNPIPE & STORMWATER
CONNECTIONS (PLUMBING & DRAINAGE
APPROVAL).
ALL NEW BUILDING ROOFS TO BE PIPED
TO RAINWATER HARVESTING TANKS
FOR EVENTS UP TO 10 YEAR ARI
RWH TANK OVERFLOW TO BE PIPED TO
WESTERN RIPs FOR EVENTS UP TO 10 YEAR
ARI
EASTERN AREA ROOFS AND HARD STAND TO
BE PIPED TO EASTERN RIPs FOR EVENTS UP
TO 10 YEAR ARI

 

 

 

 

 

 

ALL BASEMENT & CARPARK STORMWATER TO
AT 60m SPACINGS" ECOLOGICAL 3 jm) BE COLLECTED IN A SUMP & PUMPED TO
RESTORATION AREA - NO ACCESS & _ PROPOSED STAGE 4A \ DISCHARGE OVER A "FOX BPT600" GROSS
K / 2 PROPOSED RAPID INFILTRATION PIT \ POLLUTANT TRAP PRIOR TO CONNECTION TO.
y STAGE 4A (EAST) 1 OFF @ 1800dia R..P'S. BASEMENT & CARPARK DRAINAGE
g BUILDING aoa DETAILS TO HYDRAULIC CONSULTANT'S.
4 ee SPECIFICATIONS.
SP195871
PROPOSED STAGE 4B
RAPID INFILTRATION PIT
(EAST) 1 OFF @ 1800dia
‘x 2.4m DEEP
REFER, ee
i>
¥, LEGEND
oS " ™—~
Ny PROPOSED STORMWATER DRAINAGE
/ —™
PROPOSED VEGETATED SWALE
zo PROPOSED OVERLAND FLOW PATH
PROPOSED
RAINWATER
PROPOSED STAGE 4B HARVESTING}
RAPID INFILTRATION TANK °8.90 PROPOSED EARTHWORKS LEVEL
PIT (WEST) 3 OFF @
1800dia x 1.8m DEEP. _ CO
REFER OETA STAGE ZA A PROPOSED BASEMENT WALL
- \
BUILDING \ TTT TT TTT ~ PROPOSED TOP OF BATTER
Vv AD ORY JN Ser PROPOSED TOE OF BATTER
— <= < < PROPOSED SWALE
SP195871 —— —59— ——_ FINISHED SURFACE CONTOUR
EXISTING SURFACE CONTOUR
— — —E— — —_ EXISTING ELECTRICAL RETICULATION
—— —T———_ EXISTING TELSTRA RETICULATION
— — —D— — — _ EXISTING STORMWATER DRAINAGE
J LOT 9 — — —W— — — _ EXISTING WATER RETICULATION
3 SP195871 —— —s—— —_ EXISTING SEWER RETICULATION
HABITAT PROTECTION FENCE TO BE » s
ERECTED PRIOR TO COMMENCEMENT 0 4 8 12 16 20m
OF CLEARING WORKS PROVIDE SIGNAGE
AT 50m SPACINGS * ECOLOGICAL XS Ct
RESTORATION AREA - NO ACCESS SCALE 1:200 At, 1:40 A3
NOTE: ONLY DRAWINGS MARKED "FOR CONSTRUCTION" AND BEARING AN ORIGINAL SIGNATURE SHALL BE USED FOR CONSTRUCTION PURPOSES. Design: PBL Brah 101 pty Itd Ua Alta Projects PROJECT: DRAWING TITLE:
Drawn: PBL STORMWATER MANAGEMENT PLAN
A.B.N. 91 611 354 511
Dale: HAY 201 ABN o1eriase5i1 == | PROPOSED RESIDENTIAL DEVELOPMENT STAGE 4A & 4B
PO Box 559, Cotton Tree, QLD, 4558
Checked - Tel (07) 5475 4125 Fax (07) 5479 1607 | at SERENITY CLOSE, NOOSA DRAWING No:
ecker

 

 

 

 

 

 

 

 

 

 

ENGINEERING : DESIGN : MANAGEMENT Email: [email protected]

 

Revision Sheet
1 of 1

A6107/18/PSMP01

 

 

 

 

 

 

© Ts plan Ws Copyright, Other an for the purposes of and wabject to the conditions prescribed under the
Web: http://www.alta.net.au Copyright Set, no port of e may in any form or by any imeons (electrons, mechani, eto copying photo=
sikecron appv, Datum AND for CAPE BOUVARD DEVELOPMENTS CR anda car) oo rMet tre ate Ride ats tate ket es

ReEQ- 4784 daten permission of ALTA Projects, Al intellectual property remains within ALTA Projects, all enquiries should
REV DATE DESCRIPTION BY CHKD ~ A‘ SHEET SIZE FILENAME : @6107-18-PSMPO1 .dwg - DATE : 22/6/18 - 3:59pm - XREF's: a6107-X-BASE; a6107-X-SURVEY; 26107-X-ARCH landscape; a6107-X-ARCH; H-Approved-SH; H-Cheflted-SH Council Ref: be directed to ALTA Projects.

 

 

Page 11

              B
              Appendix




RIP Management &
Maintenance Plan


[OCR of page images]
RIP Management &
Maintenance Plan

 

Page 12

                RIP MANAGEMENT AND MAINTENANCE PLAN

ELEMENT:                                              MAINTENANCE OF RAPID
                                                      INFILTRATION PITS (RIP’s)
1.    Objective              To ensure ongoing function of RIP’s in reintroducing
                             runoff into the subsoil.

2.    Management Strategy    RIP to remain free of silt/sediment build-ups.

3.    Actions                Maintenance contractor        to service RIP’s   at
                             monthly intervals.

                             All removed sediment/silt to be placed in skips or
                             bins for disposal.

4.    Performance Indicators Body Corporate to ensure maintenance schedule
                             adhered to.
5.    Frequency/Deadline     Monthly inspections.
6.    Responsible    Person Body corporate to ensure maintenance schedule
      /Organisation          adhered to.

                             Maintenance contractor to make entries in
                             environmental diary noting date of RIP service,
                             condition of RIP, material removed and means of
                             disposal.

                             Random inspection by Council/EPA officers.
7.    Reporting and Review   Maintenance Contractor to make entries in
                             environmental diary noting date of RIP service,
                             condition of RIP, material removed and means of
                             disposal.

                             Random inspection by Council/EPA officers.

8.    Corrective Action      Review maintenance schedule as appropriate.

                             Replace BIDIM A14 filter yearly or more regularly
                             when necessary.

Page 13

                    C
                    Appendix




Prototype RIP Test Results


[OCR of page images]
Prototype RIP Test Results

 

Page 14

TABLE 1.0

RESULTS OF PROTOTYPE INFILTRATION PIT (IP)
TESTING 23 JULY 2001

HEAD (M)

 

0 10 20 30 40 50
INFILTRATION RATE (mm/SEC)

—_— eRe ee eee

 

    
  
 

   
  

   
  

 

 

 
    

 

 

 

DRAWHIG STATUS Design: EDF, MR FATTSSOUL.cnmerRS PY LD J PROSECT: Ce
it a ABN. 26
7 or TAL E: ti see [SETTLERS COVE — HIGH DENSITY RESDEATAL INFILTRATION PIT TESTING RESULTS
: SH,
I Datum: AMD, , :  eomEERe eRe oD 74 at SERENITY CLOSE, NOOSA HEADS DRAWING No: CIGS6/0S/MCU/IP2 Revision:
(ROFESSIONAL ENGIN! fotenetou
ev |DATE DESCRIPTION = for SETTLERS COVE DEVELOPMENT PTY LTD ancien sual Pet
SHAT TETPST CREST TTS TEE

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 15

                   D
                   Appendix




Spreadsheet Model Results


[OCR of page images]
Spreadsheet Model Results

 

Page 16

Page 17

AS UHR CEAST-)

 

 

1.60

1.40

1.20

1.00

0.80

0.60

Water Depth in Pit (m)

0.40

0.20

 

 

0.00

 

20.0

40.0

Depth vs Time
10 Year ARI

60.0

 

80.0

——5 min Storm

——10 min Storm

30 min Storm

——60 min Storm

=——~ 120 min Storm

———6 hour Storm

100.0 120.0

Time (min)

 

 

-0.20

 

 

 

22/06/2018 1:08 PM

Rapid Infiltration Pits - 4A East Comparison chart

Page 18

10 year ARI

 

Page 19

Rip 4A CWwEST.)

 

2.50

 

2.00

1.50

1.00

Water Depth in Pit (m)

0.50

 

0.00 +

 

20.0

40.0

Depth vs Time
10 Year ARI

——5 min Storm

—— 10 min Storm

30 min Storm

——60 min Storm

—— 120 min Storm

-—6 hour Storm

 

60.0

80.0

100.0 120.0

Time (min)

 

 

 

-0.50

 

 

22/06/2018 1:11 PM

Rapid Infiltration Pits - 4A West Comparison chart

Page 20

RP WS CEPesr. >)

10 year ARI

 

Page 21

Ar +B CESeT)

 

2.50

 

2.00

1.50

1.00

Water Depth in Pit (m)

0.50

0.00

 

 

 

-0.50

20.0

40.0

Depth vs Time
10 Year ARI

 

-=——5 min Storm

—— 10 min Storm

30 min Storm

—— 60 min Storm

——— 120 min Storm

——-6 hour Storm

 

60.0

80.0

100.0 120.0

Time (min)

 

 

 

 

22/06/2018 1:13 PM

Rapid Infiltration Pits - 4B East Comparison chart

Page 22

RIP 4S CWEST)

 

Page 23

Pe 4B Cums.)

 

1.80

 

1.60

1.40 »

1.20

1.00

0,80

0.60

Water Depth in Pit (m)

0.40

0.20

0.00

 

 

 

20.0

40.0

Depth vs Time
10 Year ARI

60.0

 

80.0

——5 min Storm

——— 10 min Storm

30 min Storm

=—60 min Storm

-———~ 120 min Storm

=——6 hour Storm

100.0 120.0
Time (min)

 

 

 

-0.20

 

 

22/06/2018 1:15PM

Rapid Infiltration Pits - 4B West Comparison chart

Page 24

                E
                Appendix




Detail Survey


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Detail Survey

 

Page 25

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Sunshine Coast      [email protected]
tel. 07 5443 2844    www.ProjectUrban.com.au
Brisbane                 Project Urban Pty Ltd
tel. 07 3257 4371    ACN 608 895 923 ABN 97 608 895 923