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UPDATED DA - Attachment 9A - Engineering Technical Memo
Technical Note
To: Chelsea Bennett | Noosa Shire Council
Cc: Shane Adamson | Adamson Town Planning
From: Christopher Temmerman | Covey Associates Pty Ltd
Date: 19 February 2025
Subject: Doonan Resource Recovery Redevelopment – Engineering Assumptions
Project No: 244035
Reference: M25-1015Tech
Introduction
Covey Associates has been engaged by Noosa Council to provide professional engineering services to facilitate the
preliminary design of the Doonan Resource Recovery Redevelopment – Stage 1A, the proposed redevelopment of the
Resource Recovery Area, Reviva Centre and Cleanaway Depot with supporting infrastructure including stormwater,
water quality, roadways and weighbridges.
This Technote herein summarises the Engineering Guidelines and Assumptions utilised in the completion of the
Preliminary Design material.
The areas of Flood Impact Assessment and Stormwater Management (Water Quality) are documented in Covey
Associates reports 244035/M25-0045Rpt – Issue A (dated February 2025) and 244035/M25-0042Rpt – Issue A (dated
February 2025) respectively.
References
The following documents, guidelines and standards have been referenced in the completion of the Preliminary Design
documentation as applicable:
• Noosa Shire Council (2020) Noosa Plan
• Austroads Guide to Road Design
- AGRD01 Part 1: Objectives of Road Design
- AGRD03 Part 3: Geometric Design
- AGRD04 Part 4: Intersections and Crossings General
- AGRD04A Part 4A: Unsignalised and Signalised Intersections
• Australian Standards
- AS/NZS 2890.1:2004 Parking Facilities Part 1: Off-street car parking
- AS 2890.2:2018 Parking Facilities Part 2: Off-street commercial vehicle facilities
• Australian Government – Attorney-General’s Department
- Australian Disaster Resilience Handbook Collection – Flood Hazard Guideline 7-3 (AIDR 2017)
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Existing Resource Recovery Centre
The existing resource recovery centre is located at 561 Eumundi-Noosa Road, Doonan with direct access off the State
Controlled Road. The existing facility is serviced by a channelised intersection consisting of channelised right and left
turn lanes into the development as shown in Figure 1.
Figure 1: Existing Site Entry – Eumundi-Noosa Road (Source: Nearmap 21 January 2025)
Incoming vehicles access the existing weighbridge located approximately 160 m into the site from the State Controlled
Road entry.
It is understood current operations of the site do not suitably separate public access and vehicles from the movement
of commercial waste vehicles or provide the high-level of resource recovery proposed by the site redevelopment.
Proposed Site Layout
Several operational and infrastructure location amendments are proposed for the Resource Recovery Redevelopment,
these changes are primarily to provide the following use and safety improvements:
• Separation of public vehicles from internal waste operations as much as practicable.
• Provide greater separation from the State Controlled Road site entry to the public weighbridge, providing greater
on-site vehicle capacity and removing potential impacts on the State Controlled Road.
• Provide an improved Reviva Centre, separate from the resource recovery activities with suitable vehicle
circulation, parking and set-down / pick-up zone.
• Provide a gated Cleanaway Depot for the daily operation and maintenance requirements of the Cleanaway fleet
separated from public interaction.
• Provide a Resource Recovery Centre capable of meeting the requirements of current and future waste demands,
material sorting and segregation.
• Retain the existing resource recovery station for internal waste use and future applications.
The proposed redevelopment layout is reflected in Figure 2 below, further information can be found in the Covey
Associates Preliminary Engineering plans.
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Figure 2: Proposed Resource Recovery Redevelopment
Design and Check Vehicles
Commercial vehicles are grouped into seven classes based on vehicle size and configuration as specified below in Table
1. To facilitate the design, three standard vehicle types and one nominated vehicle type have been utilised as
appropriate to inform swept paths, intersection arrangement and carriageway design.
The identification of vehicle classifications and areas of operation have been informed by the Noosa Shire Council
Waste Management Team and intended waste management operations.
Table 1: Commercial vehicle classifications (extract: AS/NZS 2890.2:2018 Section 2)
Design
Overall Clearance
Vehicle class Design width Wheel base turning Swept circles
length height
radius
SRV 6.40 2.30 3.80 7.10 15.30 3.5
MRV 8.80 2.50 5.00 10.00 21.60 4.5
HRV 12.50 2.50 6.85 12.50 27.80 4.5
AV 20.00 2.50 14.70 12.50 26.60 4.5
BD 26.00 2.50 21.70 12.50 n/a 4.5
A-double 36.50 2.50 32.30 15.00 n/a 4.5
A-triple 53.50 2.50 49.00 15.00 n/a 4.5
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In addition to the highlighted vehicle classes in Table 1 above, an additional nominated vehicle has been utilised to
represent the typical waste management vehicle dimensions referenced in Table 2 and Figure 3, typically utilised in
industrial waste collection activities.
Table 2: Nominated waste collection vehicle
Design
Overall Clearance
Vehicle class Design width Wheel base turning Swept circles
length height
radius
Nominated 10.0 2.50 5.77 10.20 - 4.50
Figure 3: Example Isuzu FY Series truck
On-Site Carparking
On site carparking has been designed in accordance with Australian Standards AS 2890.1:2004 and AS/NZS
2890.2:2018. To facilitate the preliminary design, all car parking has been classified as User Class 3A identified in Table
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Through the detailed design phase of the proposed development, carparking facilities, user classes and dimensions
are to be reviewed in conjunction with the architectural designs and specific site uses. User Class 4 (parking for people
with disabilities) will be located in accordance with the final architectural layouts and locations of need.
Table 3: Classification of off-street car parking facilities (extract: AS 2890.1:2004 – Table 1.1)
User
Required door opening Required aisle width Examples of uses
Class
Minimum for single manoeuvre Employee and commuter parking
1 Front door, first stop
entry and exit (generally, all-day parking)
Three-point turn entry and exit
Residential, domestic and employee
1A Front door, first stop into 90° parking spaces only,
parking
otherwise as for User Class 1
Long-term city and town centre
Minimum for single manoeuvre parking, sports facilities, entertainment
2 Full opening, all doors
entry and exit centres, hotels, motels, airport visitors
(generally medium-term parking)
Short-term city and town centre
Minimum for single manoeuvre
3 Full opening, all doors parking, parking stations, hospital and
entry and exit
medical centres
Additional allowance above
Short term, high turnover parking at
3A Full opening, all doors minimum single manoeuvre
shopping centres
width to facilitate entry and exit
Size requirements are
4 Parking for people with disabilities
specified in AS/NZS 2890.6
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To service the Resource Recovery Redevelopment the parking and set-down / pick-up zones have been identified in
Stage 1A as shown in Table 4.
Table 4: Proposed vehicle parking allocations
Description Dimensions Comment
Light vehicle parking 2.6 m x 5.4 m (User Class 3A) 52 designated car parking bays have been provided.
(staff and public) 2.6 m x 10.8 m (car and trailer) - 7 x Cleanaway Depot
- 23 x Reviva Centre including 2 x car and trailer parks
- 22 x lower resource recovery hardstand (bin pad)
Heavy vehicle parking Based on 10.0 m dual-steer dual Provision has been made for 13 Cleanaway trucks to be
(Cleanaway) axle heavy truck typical to full stored outside of operational hours (overnight) at the
size refuse collection vehicles lower resource recovery hardstand (bin pad)
Public set-down / pick- 2.5 m x 34.0 m (approximately) The Reviva Centre includes a set-down / pick-up short
up zone term zone for public use
Commercial vehicle 3.5 m x 80.0 m Resource Recovery Centre commercial delivery /
delivery / collection collection zone (will include some additional staff
zone carparking)
Flood Depths
Covey Associates Flood Impact Assessment, report M25-0045Rpt – Issue A – February 2025, provides results of existing
and developed case flood modelling for the 50 %, 10 %, 1 % and 1 % Climate Change Annual Exceedance Probability
(AEP) events. Results mapping is contained within Appendix C of the report.
The developed case 1.0 % Climate Change AEP confirms no water inundation to the waste collection areas with all
building Finished Floor Levels (FFL) greater than 300 mm above the identified water levels Generally in Accordance
with Condition 44 of the Negotiated Decision Notice 132005.635.03 dated 22 May 2024.
• Condition 44
“All future building floor levels and waste management areas are to be provided with surface levels which are a
minimum of 300 mm above the 1.0 % AEP local flood level, including allowance for climate change by year 2100.”
The lower Resource Recovery hardstand (bin pad) does not encounter inundation in the 1 % AEP Climate Change event,
in addition, no on ground waste recovery activities occur in this location. All waste is contained within the nominated
bins providing sufficient free board to any defined water levels.
Flood Hazard Thresholds
The Flood Impact Assessment identifies inundation to carriageways in the existing case and developed case flood
events through defined flow paths. In the developed scenario, during the 1.0 % AEP climate change event, water
surface levels on the southern internal roadways increased between 50 mm – 100 mm.
A flood hazard threshold assessment has been completed to determine the hazard. The hazard on the internal roads
is deemed acceptable at (D 0.26 m x V 1.95 m/s = 0.51 m²/s), placing the hazard vulnerability in the H2 Classification
(D x V < 0.6 m²/s, D < 0.5 m, V < 2 m/s) Unsafe for small vehicles as identified in the information below.
It is to be noted, should the site be affected by a significant rainfall event resulting in inundation of the southern
circulating road, provisions are to be in place in the Site Management Plan for the egress of public as required through
alternate routes.
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Explanatory Note – Flood Hazard Guidelines:
The relative vulnerability of the development, its built assets, employees and the public to flood hazard can be
assessed by using flood depth and velocity thresholds. The thresholds are related to the stability of both people and
vehicles in flood waters, and to buildings affected by flooding.
The Australian Disaster Resilience Handbook Collection – Flood Hazard Guideline 7-3 (AIDR 2017) provides the relevant
guidelines to assess flood hazard through three criteria as reflected in Figure 4.
Figure 4: Process for quantifying flood hazard (extract: Guideline 7-3 AIDR 2017)
Table 5: Combined hazard curves - vulnerability thresholds (extract: Guideline 7-3 AIDR 2017)
Hazard Description
Vulnerability
Classification
H1 Generally safe for vehicles, people and buildings.
H2 Unsafe for small vehicles.
H3 Unsafe for vehicles, children and the elderly.
H4 Unsafe for vehicles and people.
H5 Unsafe for vehicles and people. All building types vulnerable to structural damage.
Some less robust building types vulnerable to failure.
H6 Unsafe for vehicles and people. All building types considered vulnerable to failure.
Table 6: Combined hazard curves - vulnerability thresholds classification limits (extract: Guideline 7-3 AIDR 2017)
Hazard Classification limit Limiting still water depth Limiting velocity
Vulnerability (D and V in combination (D) (V)
Classification m²/s) m m/s
H1 D x V ≤ 0.3 0.3 2.0
H2 D x V ≤ 0.6 0.5 2.0
H3 D x V ≤ 0.6 1.2 2.0
H4 D x V ≤ 1.0 2.0 2.0
H5 D x V ≤ 4.0 4.0 4.0
H6 D x V ≤ 4.0 - -
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Conclusion This summary of Engineering assumptions and parameters has been provided in support of the Preliminary Engineering plans and associated documentation. If you require any further information or clarification on any of the items, please make contact at your earliest convenience. Regards, Author: Review: Christopher Temmerman Shane Rynne Senior Civil Designer Senior Civil Engineer DipEngSpatSci BEng (Civil), GradDipMunEng, MIEAust, CPEng, RPEQ 244035 | M25-1015Tech | 19 February 2025 Page 7