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PR-102995-10 IRR to Council_FINAL_27May14
Attached to the e-mail REC14/0005 - Response to Information Request.
Our Ref: PR102995-10 Your Ref: REC14/0005 Date: 27 May 2014 Attn: Glen Conforti Noosa Council PO Box 141 TEWANTIN QLD 4555 Via: Email ([email protected]) Dear Glen RE: SUSTAINABLE PLANNING ACT 2009 S.278 – INFORMATION REQUEST RESPONSE 178 EUMUNDI NOOSA ROAD, NOOSAVILLE (LOT 101 ON SP241371) We act for Bunnings Properties Pty Ltd regarding a Development Application lodged with Noosa Council under the Sustainable Planning Act 2009 (the Act) over the above property seeking: Development Permit for Reconfiguring a Lot (1 into 2 Lots). On 22 April 2014 we received an Information Request from Noosa Council under Section 276 of the Act. We now provide a response to the Information Requested. Pursuant to Section 278(1)(a) of the Act, this letter and attached Civil Engineering Report prepared by Intelara (Attachment A) provides a response to all of the information requested. As such, we now request that Noosa Council proceed with assessment of the application. INFORMATION REQUEST RESPONSE Stormwater 1. Provide amended plans that indicate how stormwater runoff from the development site and stormwater runoff from the external catchments will be addressed. The amended plans must include: a) Proposed connection points to the existing stormwater network, b) The necessary easements or drainage reserves. The easements and reserves must be in accordance with Council’s Planning Scheme Policy 5. Response: Stormwater runoff from the development site and external catchment areas have been addressed within the attached Civil Engineering Report, prepared by Intelara (Attachment A). Servicing 2. Provide amended plans that indicate the location of existing and proposed services including
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any necessary easements. Response: The location of existing and proposed services are shown on appended plans within the attached Civil Engineering Report prepared by Intelara (Attachment A). SUPPORTING INFORMATION The following supporting information is attached in support of this response: Attachment A – Civil Engineering Report, prepared by Intelara We trust this information is sufficient for your purposes. Should you require further details or wish to discuss these matters, please contact Stephen Mason on (07) 3124 9377 or myself on (07) 3124 9362. Yours sincerely RPS DAVID WHITEMAN Planner enc cc: Bunnings Pty Ltd PR‐102995‐10 IRR to Council_FINAL_27May14.docx Page 2
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Appendix A
Civil Engineering Report
Prepared by, Intelara
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CIVIL ENGINEERING REPORT
Project Number: 10234.01
th
Date: 14 May 2014
Site Location: 178 Eumundi Noosa Rd, Noosaville
Issue: A
Bunnings Group Limited
Head Office Brisbane
Level 3, Northpoint
231 North Quay
Brisbane QLD 4000
p +61 7 3236 1100
www.intelara.com f +61 7 3236 1155
Intelara Pty Ltd ABN 70 093 117 232 e [email protected]
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Table of Contents
1 INTRODUCTION............................................................................................................. 4
2 LOCATION ..................................................................................................................... 4
2.1 TOPOGRAPHY AND SITE DRAINAGE ............................................................................... 5
3 STORMWATER .............................................................................................................. 5
3.1 PROPOSED LOT 103 CATCHMENT ................................................................................. 5
3.2 EXISTING UPSTREAM CATCHMENT................................................................................. 6
4 SEWERAGE ................................................................................................................... 6
5 WATER SUPPLY ............................................................................................................ 6
6 ELECTRICITY AND TELECOMMUNICATIONS ............................................................. 6
APPENDIX A ......................................................................................................................... 7
10234.01_DA01 – OVERALL SITE LAYOUT PLAN .................................................................. 7
APPENDIX B ......................................................................................................................... 8
10234.01_DA02 – CIVIL SERVICES LAYOUT PLAN ................................................................. 8
APPENDIX C ......................................................................................................................... 9
20234.01_DA03 – EXISTING STORMWATER CATCHMENT PLAN .............................................. 9
APPENDIX D ....................................................................................................................... 10
SITE STORMWATER DISCHARGE CALCULATIONS – OVERALL CATCHMENT AREA .................... 10
APPENDIX E ....................................................................................................................... 11
SITE STORMWATER DISCHARGE CALCULATIONS – PROPOSED LOT 103 ................................ 11
APPENDIX F ....................................................................................................................... 12
SITE STORMWATER DISCHARGE CALCULATIONS – EXISTING UPSTREAM CATCHMENT ............ 12
APPENDIX G ....................................................................................................................... 13
DETENTION VOLUME CALCULATIONS ................................................................................... 13
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| Document Control | Rev No | Date ] Revision Details | Typist | Author Verifier | Approver | A | 14.05.2014 Draft Issue | TAH | TAH RW MRL | | pov“ | ? B | _-23.05.2014 Approval Issue TAH | Ole= fe) | hye | | | | | A person using Intelara Pty Ltd documents or data accepts the risk of: a) — Using the documents or data in electronic form without requesting and checking them for accuracy against the original hard copy version; and b) Using the documents or data for any purpose not agreed to in writing by Intelara Pty Ltd. INTELARA PTY LTD Page 3 of 13 10234.01rb01 RevB
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1 INTRODUCTION
This civil engineering report has been prepared in response to Noosa Council
Information Request for Reconfiguration of Lot 101, 178 Eumundi Noosa Rd,
Noosaville (Noosa Council Application No. REC14/0005). The report addresses
relevant engineering issues with the proposed development raised by Noosa Council
and should be read in conjunction with the attached Site Layout Plans.
The total site area of the proposed Lot 103 is 4073m2. The site is zoned “Industrial”
by Noosa Council in the Noosaville Locality. The surrounding area is also zoned
“Industrial”.
A site survey of existing services within and surrounding the development site was
carried out by RPS Australia.
Dial Before You Dig information was received in 14th May 2014 from the following
servers: Noosa Councill (stormwater), Unity Water (Water main and Sewer), Optus
(underground cable), Telstra (underground cable) and Energex (electrical supply).
2 LOCATION
The site location is presented in Figure 1.
Figure 1 Site Location
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2.1 Topography and Site Drainage
The maximum site level is approximately 16.60m AHD, falling to 9.28m AHD over a
distance of approximately 91m. There is an average existing gradient on site of
approximately 8%, falling in a south-westerly direction.
The site currently drains to a DN450 RCP pipe, which flows south to the lawful point
of discharge for Lot 101. In this report, the upstream catchment comprising of a
portion of the neighbouring site is included in the overall catchment calculations.
3 STORMWATER
All stormwater drainage calculations were undertaken in accordance with the
requirements of QUDM. The existing stormwater drainage layout for the proposed
Lot and existing Lot 101 can be found on the attached drawing 10234.01_DA01.
It is proposed that a 3.0m wide easement be provided over the existing stormwater
overland flow path to the south of the site (refer Plan 10234.01_DA01). This will allow
for unimpeded stormwater overland flow from the neighbouring property (Lot 26 on
SP151406) through the proposed Lot 103.
The current catchment for the existing point of discharge was calculated at 0.911ha,
covering an area extending into the neighbouring property (Lot 26 on SP151406) as
shown on Plan 10234.01_DA03. The total catchment discharge for a Q10 Storm event
was calculated to be 0.329m3/s, adopting a C10 value of 0.78 and a tc of 11 minutes
(refer Appendix D for runoff calculations for the overall catchment).
As this application refers only to the reconfiguration of Lot 101, and does not address
the stormwater needs of a developed site scenario, it is assumed that stormwater
detention measures will not be required. The reconfiguration of Lot 101 does not
worsen the current stormwater situation. However any future development that
increases the impervious area of the catchment will require detention measures.
Refer to Section 3.1 for information regarding assumptions made for a post-
development scenario.
3.1 Proposed Lot 103 Catchment
The proposed Lot 103 catchment covers an area of 4073m2 and is currently
vegetated. For the pre-developed scenario, a Q10 discharge of 0.137m3/s was
established, adopting a C10 value of 0.70 and tc of 10 minutes. In the case of a future
developed scenario, a Q10 discharge of 0.209m3/s was established adopting a C10
value of 0.88 and an expected tc of 6 minutes. (Refer to Appendix E for discharge
calculations).
This change in Q10 discharge value indicates that detention measures will need to be
implemented in the case of any development to proposed Lot 103 that increases the
impervious area that provides an approximate total detention volume of 27.0m3.
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3.2 Existing Upstream Catchment
A separate analysis of the existing developed site directly upstream of the proposed
lot 103 was completed to ascertain both the existing stormwater discharge off the site
and the approximate pre-development stormwater discharge. The site area in both
calculations was considered to be the portion of land directly impacting the
stormwater flow path through the proposed Lot 103 (refer plan 10234.01_DA03 for
catchment extents), an area approximately 0.504Ha in size.
For the pre-developed scenario, a Q10 discharge of 0.163m3/s was established,
adopting a C10 value of 0.7 and a tc of 11 minutes. In the post-developed scenario, a
Q10 discharge of 0.253m3/ s was established, adopting a post-developed C10 value of
0.86 and an assumed tc 6 minutes. (Refer Appendix E for discharge calculations.)
Considering the disparity between the Q10 values for both the developed site scenario
and the undeveloped, it is recommended that stormwater detention measures be
implemented to this catchment to achieve an approximate total detention volume of
33.8m3 as part of any future material change of use (refer Appendix G for detention
calculations).
4 SEWERAGE
It is proposed that a new sewer line be constructed in accordance with Council
standards (including correct offsets from boundaries and required inspection
openings) at the location indicated on plan 10234.01_DA.
A single sewer connection point to service the site will be provided at the location
indicated on Plan 10234.01_DA02.
From preliminary calculations it has been assumed that the existing downstream
sewer system has adequate capacity to cater for flows from the proposed
development.
5 WATER SUPPLY
It is anticipated that water supply to the site will be available from the existing
watermain located on the western side of Gateway Drive. It is proposed that a single
water connection to this main at the location indicated on Plan 10234.01_DA2 will
adequately service the proposed subdivision.
All water reticulation design will be undertaken in accordance with Noosa Council
requirements.
6 ELECTRICITY AND TELECOMMUNICATIONS
The proposed development site is currently well serviced with existing electricity and
telecommunication services available, which we believe will be adequate to cater for
the proposed development requirements. Only one connection point will be chosen
for each service provider to the development.
The proposed development will also be provided with sufficient underground conduits
to cater for future services.
It is assumed that during the construction phase the developer with enter into an
agreement with Telstra and Ergon Energy to provide necessary service connections
to the site.
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APPENDIX A 10234.01_DA01 – Overall Site Layout Plan INTELARA PTY LTD Page 7 of 13 10234.01rb01 Rev B
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APPENDIX B 10234.01_DA02 – Civil Services Layout Plan INTELARA PTY LTD Page 8 of 13 10234.01rb01 Rev B
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LOT 103 SERVICING
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Drawing Title
CIVIL SERVICES LAYOUT PLAN
DISCLAIMER © COPYRIGHT:
Onty hardcopies and pot electronic file dravings issued by Intelara Pty Ltd]
conplete vith drawing Frensmittal are an “Authorised Controlled issue” Dravings
issued electronically in AutoCAD dwg file format are "Uncontrolled Copies”
and intelara Pty Ltd accepts no responsibilty for their use er distrbutien,
itis the user's responsiblity Fe check completeness of al information on drawings
produced from electronically transmitted AutoCAD vg draving fies against
“Authorised Controlled Issue" hard copies formally issued by infelara Phy. Ltd
and use that information only in accordance with the Issue Status of fhe
drawing, This drawing and the design thereon are copyright and shall not be
used or copied without the written permission of Intelara Pty Ltd.
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INTEGRATED SOLUTIONS
Lvl 3 Northpoint, 231 North Quay
Brisbane QLD 4000
p: +617 3236 1100 ~ f: 46173236 1155
we www.intelara.com — ABN 07 093 117 232
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Drawn Designed Verified
NSH TAH
Scale ‘Approved Date
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Drawing Number
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APPENDIX C 20234.01_DA03 – Existing Stormwater Catchment Plan INTELARA PTY LTD Page 9 of 13 10234.01rb01 Rev B
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(— | | | STORMWATER CATCHMENTS
NAME CATCHMENT SIZE (ha)
(AN | STORMWATER CATCHMENT BOUNDARY. | EXISTING UPSTREAM CATCHMENT. 0.5040
[ PROPOSED LOT 103 CATCHMENT 0.4073,
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APPENDIX D Site Stormwater Discharge Calculations – Overall catchment area INTELARA PTY LTD Page 10 of 13 10234.01rb01 Rev B
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CALCULATION PAD ENGINEERING intelara INTEGRATED SOLUTIONS consultants. managers. advisors. JOBTITLE /73 Fumunps WceaA Ka JOB No. [o} : DETAILS Recon fiayroton od Lot fol (OL S4-0/ PREPARED BY..741. pate. 6/7!| CHECKED BY........ DATE...........-. SHEET No....!........0F.......... Ex is TIVE vty att Ca te bimerct - Cea Aven - 0-90) Ha Go = ©-78 Cty = /-Oe » Ce = fh emns a "Zo = 166-€0 um (ac _ é Quy = 2-73 x10 °CC xT, A) 10 unoleretepoot INbcheu-9€ ace ‘ ke CQuvoN%) de PP xz0 pee x (6E6 «2-9/1 ) REVISIONS | A
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APPENDIX E Site Stormwater Discharge Calculations – Proposed Lot 103 INTELARA PTY LTD Page 11 of 13 10234.01rb01 Rev B
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ENGINEERING CALCULATION PAD intelara INTEGRATED SOLUTIONS consultants. managers. advisors. JOB TITLE 17? Eumongi occa 2A pe DETAILS Peco | fon of Lot / (0234.0! VW PREPARED By 74". pate 4 14 CHECKED BY............. DATE...........-. SHEET No....!........0OF......(0..... fropesed Lot 123 Catelumont — nole elogvol olse lege Sth area + O- 4073 bh Coe 0-7 Cf -\1) \fec [QOOk 5 J ZA 110 etn fo . >.> aly ‘4 ii, é IFS * DA om Vi Qio - 277% 10° CC, x Lo x4 ) = a- 78x ,0°* C OT X IPED X 0-475) Q ro = O-/37 arf Kpored Lot 03 Gkhmont- Aegelaped alselia me $cte Arco = O- 4075 th Cole 97 Chr = p08) (Qvohr1) Ee 2 OG 6 ar ") / i o4—2 2/004 mm Lhe -3/ 6 A Qyjo + 2-77#X job CLR Lo fA) = 2. 72 tp 2 OC BF ye 2/0004 ye O- 4075) Qs | 2 407m * 5 snes Bd al cons nce ccc REVISIONS |A BY DATE
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APPENDIX F Site Stormwater Discharge Calculations – Existing Upstream Catchment INTELARA PTY LTD Page 12 of 13 10234.01rb01 Rev B
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( ENGINEERING CALCULATION PAD [ nte d fo INTEGRATED SOLUTIONS consultants, managers. advisors. JOBTITLE 773 Eumunad.+ Ayoye kA JOB No. DETAILS RecourievkATion xf Ler, (0234:0} PREPARED By.7A#...paTE 4/27) CHECKED BV............. DATE............ SHEET No.....!......0F......}..... Fx Cx Le GO ie 178 x0 > CU, TxA) = 2-73 x oC 086% 2/0 x Or Soq Hn ) > =| OTR Ble? Qy 7 od Ben REVISIONS |A Sth ow. ork (AY “ y ZT, rH -3 v— Qie : ae By 10 C t Q Exe ie op Ares CotehewsgeN, . / A- O- 504+ He & be Ci = é pe Zo = 210 v0, fb <4. upr Cary Cok hunert - iniete. gedl abicchearge Guo Ceo ©O-7 fy = ) sae) &; =O (Qonr } Ec J) naling Hed. Cink Je w we LD, x A) = 2-78 x 10-7? Co 7 % 46-6 ¥ O-S0m ) re . O- 163 ow boc 4. hecrhgedl © L Shore Cio O.76 ~% O-%O oO. 36 ¢ & a 1.00) Bracing
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APPENDIX G Detention Volume Calculations INTELARA PTY LTD Page 13 of 13 10234.01rb01 RevB
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Proposed Lot 103 Detention Volume Calculation (Future)
Initial Sizing of a Detention Basin (QUDM Section 5.05.1)
(QUDM EQN 5.04)
(QUDM EQN 5.05)
(QUDM EQN 4.13)
(QUDM EQN 4.02)
Pre-developed Flow, Qo
Time of Concentration, t c = 10 mins
Coefficient of Discharge, C = 0.7 (QUDM Tb 4.05.3)
Intensity, 10I10 = 173.22 mm/hr (IFD Data)
Area, A = 0.407 ha
3
Qo = 0.137 m /s (QUDM EQN 4.02)
Post-developed Flow, Qi
Time of Concentration, t c = 6 mins
Coefficient of Discharge, C = 0.88 (QUDM Tb 4.05.3)
Intensity, 6I10 = 210.04 mm/hr (IFD Data)
Area, A = 0.407 ha
3
Qi = 0.209 m /s (QUDM EQN 4.02)
r= 0.344 (QUDM EQN 5.05)
Vi = 100.38 (QUDM EQN 4.13)
Vs/Vi = 0.269 (QUDM EQN 5.04)
3
Vs = 27.0 m
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Existing Upstream Catchment Detention Volume Calculations
Initial Sizing of a Detention Basin (QUDM Section 5.05.1)
(QUDM EQN 5.04)
(QUDM EQN 5.05)
(QUDM EQN 4.13)
(QUDM EQN 4.02)
Pre-developed Flow, Qo
Time of Concentration, t c = 11 mins
Coefficient of Discharge, C = 0.7 (QUDM Tb 4.05.3)
Intensity, 11I10 = 166.6 mm/hr (IFD Data)
Area, A = 0.504 ha
3
Qo = 0.163 m /s (QUDM EQN 4.02)
Post-developed Flow, Qi
Time of Concentration, t c = 6 mins
Coefficient of Discharge, C = 0.86 (QUDM Tb 4.05.3)
Intensity, 6I10 = 210 mm/hr (IFD Data)
Area, A = 0.504 ha
3
Qi = 0.253 m /s (QUDM EQN 4.02)
r= 0.354 (QUDM EQN 5.05)
Vi = 121.46 (QUDM EQN 4.13)
Vs/Vi = 0.278 (QUDM EQN 5.04)
3
Vs = 33.8 m