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The Village - Stage 7
Abbott Street, Oonoonba
Rail Noise Assessment Report
Economic Development Queensland
Reference: 14BRA0091 R02_4 Stage 7
12 October, 2018
Site: Stage 7 Oonoonba UDA i Reference: 14BRA0091 R02_4 Stage 7
© 2018 - TTM Consulting Pty Ltd
ABN 65 010 868 621
41A Quay Street, Sanctuary Cove, Qld 4212
PO Box 930, Sanctuary Cove, Qld 4212
T: (07) 5514 8000 F: (07) 5514 8144 E: [email protected]
Rev No.
Author Reviewed/Approved Description Date
Name Signature
A J Fox E O'Callaghan Internal review 11/01/2016
0 J Fox Draft report 11/01/2016
1 J Fox Issued to client 22/01/2016
3 J Fox AAAS E O'Callaghan MAAS RFI response 20/06/2016
4 P Drake J Fox Revised barrier realignment
12/10/2018
Site: Stage 7 Oonoonba UDA ii Reference: 14BRA0091 R02_4 Stage 7
Table of Contents
1. Introduction 1
Background 1
References 1
Scope 1
2. Site Description 2
Site Location 2
Acoustic Environment 2
Development Proposal 3
3. Measurements 4
Equipment 4
Attended Rail Noise Measurements 4
Results of Measurements 5
4. Rail Noise Criteria 7
State Development Assessment Provisions 7
Queensland Development Code MP4.4 8
5. Analysis - Rail Noise 9
Measured Noise Levels 9
Rail Volumes 9
Noise Model 9
Predicted Rail Noise Levels 10
6. Recommendations 14
Acoustic Barrier 14
Dwelling Treatments 15
7. Conclusion 16
Table Index
Table 1: Measured Noise Levels from Passing Trains 5
Table 2: SDAP Rail Noise Criteria 7
Table 3: Rail Noise Category Levels – QDC MP4.4 (Schedule 3) 8
Table 4: Rail Noise Modelling Parameters 9
Table 5: Verification of the Rail Noise Model 10
Table 6: Predicted LAeq Noise Levels from Passing Trains 10
Table 7: QDC Noise Categories - Stage 7 Lots 15
Site: Stage 7 Oonoonba UDA iii Reference: 14BRA0091 R02_4 Stage 7
Figure Index
Figure 1: Site Locality 2
Figure 2: Rail Noise Measurement Locations 4
Figure 3: Predicted Ground Floor Lmax Rail Noise Levels - No Acoustic Barrier 11
Figure 4: Predicted Ground Floor QDC MP4.4. Lmax Rail Noise Levels - No Acoustic Barrier 11
Figure 5: Predicted Ground Floor Lmax Rail Noise Levels - Inclusive of Acoustic Barrier 12
Figure 6: Predicted First Floor Lmax Rail Noise Levels - Inclusive of Acoustic Barrier 13
Figure 7: Recommended Acoustic Barrier 14
Appendices
Appendix A Development Plans 17
Appendix B DTMR Information Request 21
Appendix C SoundPLAN Noise Modelling Outputs 23
Appendix D Extract of QDC MP4.4 32
Site: Stage 7 Oonoonba UDA 1 Reference: 14BRA0091 R02_4 Stage 7
1. Introduction
Background
TTM was engaged by Economic Development Queensland to undertake a rail noise assessment
for Stage 7 of The Village development located at Abbott Street, Oonoonba.
The report assesses the potential impacts from rail noise onto Stage 7 without and with the
inclusion of acoustic barriers and forms part of a development application for consideration by
Economic Development Queensland.
Previous versions of this report addressed acoustic items contained in the Department of
Transport and Main Roads information request (email correspondence dated 23 March 2016).
This report is a revision of TTM report 14BRA0091 R02_3 due to a change in the acoustic barrier
alignment.
References
The assessment is based on the following:
a. Noise criteria detailed in Section 4.
b. Department of Transport and Main Roads information request (shown in Appendix B).
c. Development layout (shown in Appendix A) and design contours provided by Economic
Development Queensland.
d. Acoustic fence details plan by Calibre Consulting (Revision C). Shown in Appendix A.
e. Noise measurements, analysis and calculations conducted by TTM.
Scope
The assessment includes the following:
i. Description of the site;
ii. Measurement of existing rail noise levels and statement of the assessment criteria;
iii. Prediction of future rail noise levels at the development;
iv. Analysis of predicted noise levels;
v. Details of recommendations to be incorporated to achieve predicted compliance with
the State Development Assessment Provisions State Code 2: Development in a railway
environment.
Site: Stage 7 Oonoonba UDA 2 Reference: 14BRA0091 R02_4 Stage 7
2. Site Description
Site Location
The Oonoonba Urban Development Area covers approximately 83 hectares of land in the
suburb of Oonooba, about 3.5km south of the Townsville City Centre. The site is bounded by the
Ross River to the west and north, a rail corridor and Abbott Street road corridor to the east, and
the suburb of Idalia to the south. The site locality is shown in Figure 1.
Figure 1: Site Locality
Acoustic Environment
The site is primarily affected by railway noise associated with the North Coast Rail Line, which
separates the site from Abbott Street and vacant land. It is understood that freight trains will in
future, be diverted by a new rail corridor east of the existing corridor. The Townsville Eastern
Access Rail Corridor (TEARC) is a proposed freight line which will connect the North Coast Line
directly into the Port of Townsville. The construction of this line is likely to reduce the number
and type of trains which currently pass the development site. The timing of construction of the
Townsville Eastern Access Rail Corridor is currently unknown.
Oonoonba UDA
boundary
Site: Stage 7 Oonoonba UDA 3 Reference: 14BRA0091 R02_4 Stage 7
Development Proposal
The overall proposal is to develop the 83 hectare site in 17 stages as a mixture of residential and
commercial land uses including an esplanade, retail offerings and parks. This assessment shall
focus on Stage 7 which comprises 69 residential lots. The development plan is shown in
Appendix A.
Site: Stage 7 Oonoonba UDA 4 Reference: 14BRA0091 R02_4 Stage 7
3. Measurements
Equipment
The following equipment was used to measure existing rail noise levels:
• RION NA-28 Sound Level Meter (SLM) (SN# 01060055).
• RION NA-74 Sound Calibrator (SN# 35073393).
All equipment was calibrated by a NATA accredited laboratory. The equipment was field
calibrated before and after the measurement session. No significant drift from the reference
signal was recorded.
Attended Rail Noise Measurements
Attended noise measurements of train passes were conducted during separate site visits to
Oonooba on the 22nd and 30th of July 2010 and 18th February 2015. The SLM was positioned at
multiple locations to obtain representative measurements of trains passing the site and at the
bridge northeast of the site. The SLM was located in a free-field position approximately 1.5
metres above ground level and directed at the nearest point to the track. The measurement
locations are shown in Figure 2.
Figure 2: Rail Noise Measurement Locations
Noise measurements were conducted using "A” weighting, "Fast' response, and 5 minute
statistical intervals. Statistics recorded included the LAmax, SEL\LAE, and LAeq.
Note: the SEL or LAE is the sound exposure level. A parameter closely related to LAeq for
assessment of train events that have similar characteristics but are of different duration. The
X
X
X
X
X
Attended rail
noise
measurement
locations
Site: Stage 7 Oonoonba UDA 5 Reference: 14BRA0091 R02_4 Stage 7
LAE value contains the same amount of acoustic energy over a 'normalised' one second period
as the actual noise event under consideration.
The measurements were conducted generally in accordance with Australian Standards AS10551
and AS23772. Weather conditions during the attended measurements were fine with light
winds.
Results of Measurements
3.3.1. Rail Noise Levels
Measurements of 18 individual train passes were recorded along the North Coast Rail Line over
3 separate site visits to Oonoonba. The measured noise levels are summarised in Table 1.
The Queensland Rail Code of Practice - Railway Noise Management defines the single event
maximum sound pressure level as the arithmetic average of maximum levels from the highest
15 single events over a 24 hour period. Based on rail noise modelling guidelines from DTMR,
where attended noise measurements are used in calculating the single event maximum sound
pressure level, the number of events used in the averaging should reflect the proportion of the
total daily events. Therefore based on the obtained 18 measurements of the total scheduled 45
trains per day, the averaging is based on the highest 40% (6) of noise measurements, as
detailed in Table 1.
Table 1: Measured Noise Levels from Passing Trains
Day/Date Train Type Direction of Travel
Measurement Distance (m)
Maximum Noise Level, LAmax dB(A)
Instantaneous Noise Level,
SEL dB(A)
Thursday, 22/07/2010
Freight South 10 82 88
Freight South 10 78 88
Diesel engine North 7 91 92
Freight North 7 87 94
Freight North 55 75 85
Freight South 15 91 94
Freight North 18 79 89
Freight North 6 83 92
Diesel engine North 6 82 86
Friday, 30/07/2010
Freight North 20 76 84
Freight South 17 92 91
Freight North 20 76 84
Passenger (diesel) North 20 80 88
1 Australian Standard AS1055:1997 Aocustics – Description and Measurement of Environmental Noise.
2 Australian Standard AS2377:2002 Acoustics – Methods for the Measurement of Railbound Vehicle Noise.
Site: Stage 7 Oonoonba UDA 6 Reference: 14BRA0091 R02_4 Stage 7
Day/Date Train Type Direction of Travel
Measurement Distance (m)
Maximum Noise Level, LAmax dB(A)
Instantaneous Noise Level,
SEL dB(A)
Freight South 17 91 96
Freight South 17 79 85
Freight North 20 74 80
Wednesday, 18/02/2015
Freight South 10 77 82
Freight South 10 82 85
Single Event Maximum Sound Pressure Level corrected to a distance of 10m
89
Site: Stage 7 Oonoonba UDA 7 Reference: 14BRA0091 R02_4 Stage 7
4. Rail Noise Criteria
State Development Assessment Provisions
The internal and external noise criteria for railway transport activities are contained in the State
Development Assessment Provisions (SDAP) State Code 2: Development in a railway
environment. The criteria are reproduced in Table 2.
Table 2: SDAP Rail Noise Criteria
Performance Outcome Acceptable Outcome
PO24
Development involving:
1. an accommodation activity; or 2. land for a future accommodation
activity
minimises noise intrusion from a
railway or type 2 multi-modal corridor
in habitable rooms.
AO24.1 A noise barrier or earth mound is provided which is designed,
sited and constructed:
1. to meet the following external noise criteria at all facades of the building envelope:
a) ≤65 dB(A) Leq (24 hour) facade corrected b) ≤87 dB(A) (single event maximum sound pressure level)
facade corrected 2. In accordance with the Civil Engineering Technical Requirement –
CIVIL-SR-014 Design of noise barriers adjacent to railways, Queensland Rail, 2011.
OR all of the following acceptable outcomes apply:
AO24.2 Buildings which include a habitable room are setback the
maximum distance possible from a railway or type 2 multi-modal
corridor.
AND
AO24.3 Buildings are designed and oriented so that habitable rooms are
located furthest from a railway or type 2 multi-modal corridor.
AND
AO24.4 Buildings are designed and constructed using materials which
ensure that habitable rooms meet the following internal noise criteria:
1. ≤45 dB(A) single event maximum sound pressure level.
Habitable rooms of relevant residential buildings located within a transport noise corridor must comply with the Queensland Development Code MP4.4 Buildings in a transport noise corridor
PO25
Development involving an accommodation activity minimises noise intrusion from a railway or type 2 multimodal corridor in outdoor spaces for passive recreation
AO25.1 A noise barrier or earth mound is provided which is designed,
sited and constructed:
1. To meet the following external noise criteria in outdoor spaces for passive recreation: a) ≤62 dB(A) Leq (24 hour) free field b) ≤84 dB(A) (single event maximum sound pressure level) free
field.
In accordance with the Civil Engineering Technical Requirement – CIVIL-SR-014 Design of noise barriers adjacent to railways, Queensland Rail, 2011.
Site: Stage 7 Oonoonba UDA 8 Reference: 14BRA0091 R02_4 Stage 7
Queensland Development Code MP4.4
The Queensland Development Code Part MP 4.4 - 'Buildings in a Transport Noise Corridor'
August 2015 (QDC) specifies Noise Categories to ensure that habitable rooms of residential
buildings are adequately protected from transport noise.
The Noise Categories specify the minimum acoustic RW ratings for each building component
(and provide examples of the relevant systems) to comply with the indoor sound crietria. Details
regarding the noise categories and acceptable forms of construction can be found within
Schedule 1 and 2 of the QDC document. The noise categories for rail noise impacts are
summarised in Table 3.
Table 3: Rail Noise Category Levels – QDC MP4.4 (Schedule 3)
Noise Category Single event maximum noise* LAmax for railway land
Category 4 ≥ 85 dB(A)
Category 3 80 – 84 dB(A)
Category 2 75 – 79 dB(A)
Category 1 70 – 74 dB(A)
Category 0 ≤ 69 dB(A)
* Measured at 1 metre from the façade of the proposed or existing building.
The QDC Noise Categories have been used to specify the acoustic building treatment
requirements for each lot within the development.
Site: Stage 7 Oonoonba UDA 9 Reference: 14BRA0091 R02_4 Stage 7
5. Analysis - Rail Noise
Measured Noise Levels
The measured noise levels from train passes on a representative section of the rail corridor are
presented in Section 3.3.
Rail Volumes
Rail volumes for a selection of dates were provided by Queensland Rail (email correspondence
dated 21/04/2016) which indicates that there are an average of 45 train passes per day during
the sugar season. Based on the QR information, 95% of those train passes are said to be freight
trains.
TTM have been advised by QR that all services are subject to alteration, addition and
cancellation which may vary the number of actual trains passing on a daily basis. Due to
confidentiality QR was unable to provide details of any future plans to duplicate the rail lines or
of the ultimate rail traffic volumes.
Noise Model
5.3.1. Noise Modelling Parameters
Rail noise predictions were modelled using ‘SoundPLAN’ v8.0. The basis of the ‘SoundPLAN’
model is as follows:
Table 4: Rail Noise Modelling Parameters
Description Value
Modelling program SoundPLAN v8.0
Prediction methodology Nordic Rail Pred. Method (Kilde Rep.130)
Angle Increment 1O
Noise contour grid spacing 4m squares
Train frequency 45 trains per day (approximate)
Train speed 40 km/h (approximate)
Ground contours Natural surface and design contours provided by EDQ
Noise source height above grade 3.0m above rail line which reflects the engine height of the freight trains that typically use this rail corridor
Ground floor receiver height 1.8m above assumed pad level
First floor receiver height 4.6m above assumed pad level
Façade correction +2.5 dB(A)
5.3.2. Noise Model Verification
The single event maximum noise level at the attended noise measurement location was verified
in the noise model prior to modelling noise impacts at the development. Table 5 presents the
results of the noise model verification.
Site: Stage 7 Oonoonba UDA 10 Reference: 14BRA0091 R02_4 Stage 7
Table 5: Verification of the Rail Noise Model
SLM Location Measured ‘single
event maximum’ LAmax Predicted ‘single
event maximum’ LAmax Required Correction
10m from rail line 89 89 0
The modelled levels are within an acceptable tolerance of the measured levels and therefore no
correction is required.
Predicted Rail Noise Levels
Noise modelling was conducted to determine rail noise levels at Stage 7 of the development.
Scenarios without and with acoustic barriers were considered which are presented in the
following sections.
5.4.1. No Acoustic Barriers
Based on the measured LAE level, calculations were conducted utilising the number of trains
per day to determine the LAeq (24 hour) noise impacts. Table 6 presents the predicted average noise
levels at ground floor level, based upon 45 train passes per day.
Table 6: Predicted LAeq Noise Levels from Passing Trains
Assessment Location Distance
from Rail Line (m)
Predicted*
LAeq (24 hour) dB(A)
Criteria*
LAeq (24 hour) dB(A)
Complies:
Nearest Stage 7 residential lots 25 56 65 ✓
*façade corrected noise level.
The predicted LAmax rail noise contours at the ground floor of lots (without acoustic barriers) are
presented in Figure 3 below. Figure 4 provides a comparison against the noise categories of
QDC MP4.4. Receiver point modelling results showing the assumed pad level are shown in
Appendix C.
Site: Stage 7 Oonoonba UDA 11 Reference: 14BRA0091 R02_4 Stage 7
Figure 3: Predicted Ground Floor Lmax Rail Noise Levels - No Acoustic Barrier
Figure 4: Predicted Ground Floor QDC MP4.4. Lmax Rail Noise Levels - No Acoustic Barrier
Noise
Category 3
Noise
Category 2 Noise
Category 1
SDAP A024.1 of PO24
external Lmax criteria of 87
dB(A) façade corrected
Site: Stage 7 Oonoonba UDA 12 Reference: 14BRA0091 R02_4 Stage 7
5.4.2. Summary of Predicted Noise Levels – No Acoustic Barrier
Rail noise levels are predicted to comply with the external criteria listed in SDAP A024.1 of PO24
at all lots without the need for acoustic barriers.
QDC MP4.4 Noise Categories are required to ensure that dwellings are designed to achieve
compliance with internal noise limits. The ground floor of Lots 718-719, and Lots 737-745 fall in
QDC MP4.4 Noise Category 3 which has relatively high building treatment requirements. At the
request of Economic Development Queensland, acoustic barriers were modelled and
recommended in order to reduce the building treatment requirements at these lots. Noise
modelling results inclusive of the recommended barrier are presented in the following section.
5.4.3. Inclusive of Acoustic Barriers
The predicted LAmax rail noise contours at ground and first floors of lots are presented in the
figures below. Barriers are recommended to reduce the building treatment requirements for
future dwellings and therefore the noise contours provide a comparison against the noise
categories of QDC MP4.4. Receiver point modelling results showing the assumed pad level are
shown in Appendix C.
Figure 5: Predicted Ground Floor Lmax Rail Noise Levels - Inclusive of Acoustic Barrier
Site: Stage 7 Oonoonba UDA 13 Reference: 14BRA0091 R02_4 Stage 7
Figure 6: Predicted First Floor Lmax Rail Noise Levels - Inclusive of Acoustic Barrier
5.4.4. Summary of Predicted Noise Levels – Inclusive of Acoustic Barrier
Rail noise levels are predicted to comply with the external criteria at all lots. By incorporating an
acoustic barrier into the design, the acoustic building treatments at ground floor of dwellings
will be QDC MP4.4 Noise Category 2 or less. The first floor level of dwellings on lots nearest to
the rail corridor will be Noise Category 3.
Refer to the recommendations detailed in Section 6.
Site: Stage 7 Oonoonba UDA 14 Reference: 14BRA0091 R02_4 Stage 7
6. Recommendations
Compliance with the criteria is predicted based on the implementation of the recommendations
detailed below.
Acoustic Barrier
Acoustic barriers are recommended to reduce the QDC MP4.4 construction requirements for
the ground floor level of dwellings. The location and extent of the acoustic barrier is shown in
Figure 7. Barrier recommendations are as follows:
a. The acoustic barrier should be minimum 3.0m high along the eastern site boundary.
The recommendation assumes the barrier will continue along the same alignment into
future stages to the north and to the south.
b. The barrier height is relative to finished earthwork levels, or at a minimum RL 3.9m.
c. The barrier should be constructed of a material with a surface density of at least
15kg/m2 and be constructed in accordance with Queensland Rail Civil Engineering
Technical Requirement – CIVIL-SR – Design of noise barriers adjacent to railways.
d. No gaps or holes should be evident in the fence construction.
Figure 7: Recommended Acoustic Barrier
LEGEND
3.0m high
acoustic barrier
Barrier to continue into
future stages to the north
and south, as indicated
Site: Stage 7 Oonoonba UDA 15 Reference: 14BRA0091 R02_4 Stage 7
Dwelling Treatments
To ensure compliance with the internal noise criteria, noise categories of QDC MP4.4 are
recommended.
The QDC MP4.4 requires that habitable rooms in residential buildings located in a transport
noise corridor are adequately protected from transport noise to safeguard occupant’s health
and amenity.
In order to achieve the performance requirements of the QDC MP4.4, the external building
envelope of habitable rooms must comply with the minimum RW for each building component
specified in Schedule 1 to achieve a minimum transport noise reduction level for the relevant
noise category by either one of the following:
a. Using materials specified in Schedule 2 of the QDC MP4.4;
OR
b. Using materials with manufacturer’s specifications that, in combination, achieve the
minimum RW value for the relevant building component and applicable noise category.
For application of Point (b), possible alternative constructions can be determined by the glazier
(for glazing) and construction manuals such as ‘The Red Book’ by CSR (for walls and
roof/ceiling).
The QDC Noise Categories for Stage 7 of the development are presented in Table 7.
Table 7: QDC Noise Categories - Stage 7 Lots
The construction requirements for each noise category are outlined in Schedule 1 and Schedule
2 of QDC MP4.4. An extract of that document is provided in Appendix D.
Dwellings may be constructed in accordance with the QDC Noise Category construction
requirements for the nominated lot, or alternatively an individual acoustic assessment can be
conducted by a suitably qualified acoustic consultant once building plans are available.
QDC Noise Category Lots Requring Acoustic Treatment
Ground Floor Level First Floor Level
Noise Category 4 n/a n/a
Noise Category 3 n/a 717-720, 735-747, 765-768
Noise Category 2 704-708, 714-723, 733-749, 759-768 700-716, 721-734, 748-764
Noise Category 1 700-703, 709-713, 724-732, 750-758 n/a
Noise Category 0 n/a n/a
Site: Stage 7 Oonoonba UDA 16 Reference: 14BRA0091 R02_4 Stage 7
7. Conclusion
A rail noise assessment was conducted for Stage 7 of The Village development at Oonoonba.
Provided the recommendations presented in Section 6 are implemented, the development is
predicted to comply with the assessment criteria outlined in Section 4.
Site: Stage 7 Oonoonba UDA 17 Reference: 14BRA0091 R02_4 Stage 7
Appendix A Development Plans
Site: Stage 7 Oonoonba UDA 18 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 19 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 20 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 21 Reference: 14BRA0091 R02_4 Stage 7
Appendix B DTMR Information Request
Site: Stage 7 Oonoonba UDA 22 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 23 Reference: 14BRA0091 R02_4 Stage 7
Appendix C SoundPLAN Noise Modelling
Outputs
Site: Stage 7 Oonoonba UDA 24 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 25 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 26 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 27 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 28 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 29 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 30 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 31 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 32 Reference: 14BRA0091 R02_4 Stage 7
Appendix D Extract of QDC MP4.4
Site: Stage 7 Oonoonba UDA 33 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 34 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 35 Reference: 14BRA0091 R02_4 Stage 7
Site: Stage 7 Oonoonba UDA 36 Reference: 14BRA0091 R02_4 Stage 7