1856 - Partial Response to Information Request - Barlow Shelley OPW20-0145 · OPW20/0145

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Item 6
Amend the pathway width on the western side of Road C to be in accordance with Condition 17

Response
Please refer to Drawings 1856 R36 & R39 which demonstrates this footpath width is compliant
with Condition 17. The 3m footpath width is proposed to be initiated at the pedestrian crossing
location to the eastern side of Road C as this ensures suitable verge width for Stormwater Quality
Treatment devices and drainage structures in the verge and provides a clear transition point from
a 2m wide footpath to 3m wide.


Item 7
Road C is proposed with a 15m carriageway, compared with the 12m width required in Condition
17. Clarify how the proposed wider width is proposed to be used and operated.

Response
Please refer to Drawing 1856-R52 with additional information to confirm the design road reserve
widths and pavement widths are compliant with Condition 17. The 15m carriageway (measured
between kerb inverts or nominal face of kerbs) is inclusive of the 1.5m cycle lanes on each side
of the 12m carriageway width.


Item 8
Indicate on the relevant plans the pathway as described in Condition 24(d)

Response
Please refer to Drawing 1856-R37 demonstrating the proposed pedestrian pathway network
configuration in front of Covenant J. The north verge of the Hofmann Drive road extension is
proposed to contain a Stormwater Quality Improvement Device (SQID) here as this is the low
point in the road catchment. Incorporating a pedestrian pathway along this frontage when there
is already a pathway on the southern verge will compromise the ability to effectively locate a
bioretention basin here without imposing on the existing boundary of Covenant J. It is understood
that provision for a pedestrian connection to the frontage of proposed Lots 17-21 will be applied
as conditions of future development for these lots. In order to provide a pedestrian connection to
the network here, it is proposed that the pathway network divert all foot traffic to the southern
verge where adjacent to the bioretention basin and then return it to the northern verge to provide
future pedestrian connection along the frontage of Lots 17-21. Therefore, the pedestrian network
connectivity is maintained, and suitable spatial provision is made for the SQID which is essential
to clean stormwater discharge from the subdivision road network.


Item 9
The proposed level of the roundabout at the Road B / Hofmann Dr intersection appears to be too
high and creates possibly unnecessarily steep grades into Road B and Hofmann Dr from the
roundabout. Provide an amended design that lowers the roundabout to improve these grades, or
alternatively provide justification for the proposed design

Response
Please refer to Drawings 1856 R36, R45 and R48 with amended longitudinal grades for the
approach and departure for Hofmann Drive and Road B with the proposed southern roundabout.
These grades have been reduced to 6% in accordance with Austroads requirements. Please note
the southern roundabout is at a predetermined level to ensure that the existing topographical site
catchments are generally maintained. Road A, which grades out to the existing roundabout on
Walter Hay Drive, has a very shallow gradient of 0.5%. If the roundabout surface levels were
reduced, this would divert the eastern site catchment back towards Covenant J and the Hofmann
Drive drainage reserve.




 1856 – Stockwell Development Group – Noosa Civic                                        Page 2 of 7

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Item 10
Provide design vehicle swept path diagrams for turning movements at intersections, to/from left
turns only driveways, and the emergency access driveways.

Response
Please refer to Drawings 1856 T10-T15 which demonstrate the vehicle swept paths and are
consistent with those drawings provided with the RAL18/0023 documents.


Item 11
The diameter of the central islands of the two roundabouts appears to be too small. Provide
amended plans that increase the diameter to be as large as possible while still accommodating
the design vehicle.

Response
The diameter of the proposed north and south roundabout median islands is consistent with the
traffic advice provided by Cardno for the Reconfiguration of Lots approval. That is, a 12m radius
for the island as per Austroads Chapter 4B, Table 4.1, Row 3 and depicted on Drawings 1856-
R58 and 1856-R60.


Item 12
Provide amended plans that widen the central island at the eastern end of Hofmann Drive to the
maximum achievable when design vehicle paths are considered (with less chevron painted
areas).

Response
The chevron painted area to the south of the median splitter island west of the southern
roundabout in Hofmann Drive was provided to maximise available turning area for truck swept
paths into Hofmann Drive. This has been removed and replaced with island where possible based
on the latest swept paths provided. Please refer to Drawings 1856 R58, R65 and T10.


Item 13
Provide amended plans that indicate pedestrian facilities (pram ramps and splitter island
crossings) on all legs of both new roundabouts. The features are to be located 6m clear of the
roundabout circulating carriageway so that pedestrians can cross behind a vehicle waiting to enter
the roundabout.

Response
Please refer to Drawings 1856 R65, R68 & R69 which demonstrate the additional pedestrian
crossing locations in accordance with IPWEAQ RS-091 & 092. The pedestrian crossing at the
southern end of Road C is set back further from the roundabout to address the driveway for Lot
9 and SQIDs on the eastern and western verges.


Item 14
Provide amended plans that do not indicate access driveways except for those for lots specifically
described in Conditions 8 and 19a.

Response
Please refer to Drawings 1856 R35-R42 which identify driveways to be constructed with the
subdivision works and driveway that will be constructed with the future development of the lots.




 1856 – Stockwell Development Group – Noosa Civic                                        Page 3 of 7

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Item 15
Provide amended plans that indicate lockable gates to prevent regular use of the emergency
access for Lot 23, both on the driveway and on the central median crossing, together with
appropriate signage.

Response
Please refer to Drawing 1856-R40 demonstrating the emergency gate position and type. It is not
proposed to include any gate device in the central median breakthrough in Walter Hay Drive as
this is another access device that would need to be operated in an emergency, thereby slowing
down egress. The breakout in the central median island is proposed at only 6.2m wide to prevent
regular vehicles having sufficient space to use the breakout for U-turns.


Item 16
Provide a specific assessment by an RPEQ of the position of the emergency access location for
lot 23. The assessment must ensure that the most appropriate location is adopted taking account
of sight lines along both Walter Hay Drive carriageways as well as inherent bushfire emergency
access requirements. The access must be located to achieve the most appropriate balance of
having adequate sight lines onto Walter Hay Drive while also satisfying bushfire requirements
(being to have the access near the western end of lot 23).

Response
Please refer to Drawing 1856-R41 demonstrating the emergency egress location from Lot 23
including sight lines. Condition 8.1 of the court ordered approval requires the egress point to be
located in the north western section of the Lot 23 frontage.
Austroads Table 3.5 for crossing requires a 4 second critical acceptance gap (tc). From Table
3.6, the minimum sight distance should be 67m based on a 60km/hr approach speed or 89m
based on an 80km/hr approach speed. There is a high likelihood that the vehicle speed approach
will be significantly reduced in an emergency event where the gate is intended for use. Therefore,
the sight distance requirement based on the posted speed on 60 km/hr is deemed appropriate.
The below aerial screenshot verifies the sight distance shown on plans as approximately 70m
due to vegetation.




                  Figure 1: approximate sight distance from aerial map (Nearmap 2020)




 1856 – Stockwell Development Group – Noosa Civic                                        Page 4 of 7

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Item 17
Indicate on the relevant plans where on-street parking is proposed to be prohibited.

Response
Please refer to Drawing 1856-R65 which show line marking on Road B, restricting on street
parking to the Lot 16 frontage.


Item 18
Council has some concerns with the proposed horizontal alignment of the Hofmann Dr extension
and Road C, particularly the reverse curves on both roads and the small radius curve in Road C.
Provide assessment, prepared by an RPEQ, of the proposed horizontal alignment of Hofmann Dr
and Road C against the requirements of Council’s Engineering Design Standards.

Response
The straight tangents between the same direction corners in Hoffman and Road C have been
removed as part of this IR response and curves flattened to a wider radius where possible.
Reverse curves will still be necessary as a result of either alignment into a roundabout (Road C
to the proposed southern roundabout) or due to existing boundary lines (for Covenant J) and the
current construction alignment of the road pavement for Hofmann Drive. It is proposed these
reverse curves remain in the design. Please refer to Drawings 1856 R36, R37, R48 & R51 which
demonstrate the road alignment.


Item 21
Clarify if a further operational works application will be lodged to satisfy condition 49 or provide
updated plans to satisfy condition 49, and include access gate to Covenant L.

Response
Condition 49 of the court ordered approval requires a 1.8m high chainwire fence to the
development perimeter adjacent Covenant J on the Lot 17 boundary, the boundary of proposed
lots 12-15 and Lot 5 on SP222982, proposed Lot 12 and Lot 3 on SP182845, and the northern
boundary of Proposed Lot 23 and Lot 147 NPW889 (excluding within the Energex easement).
Please refer to Drawings 1856 R35-R38 & R41 which show the location and specifications for the
1.8m high chainwire fence in accordance with AS 1725.1 and gate locations to Covenant J from
Proposed Lot 17 and Lot 5 on SP222982 from Proposed Lot 13.


Item 29
Provide amended landscape plans showing landscaping to the splitter island, suitable for
pedestrian and vehicle sight lines

Response
Please refer to Drawing 1856-R40 which shows the Lot 23 splitter island to the Walter Hay Drive
Roundabout vegetated in coordination with the Landscape drawings. Please refer to landscape
drawings for details of treatments and vegetation to be installed in the splitter island.


Items 30-34

Response
Please refer to Drawings 1856-SW01-SW30 which have been amended as per the Information
Request Items to demonstrate the following:
   · Extended Detention depths nominated to all bioretention cross sections
   · Spot levels of road pavements, kerb inverts and footpaths added to bioretention cross
       sections or new surface section details included for street trees
   · DN100 PVC slotted underdrains shown on bioretention layout plans
   · Verge services (water supply, sewer reticulation, communications, electrical and
       stormwater pipes) are included on drawings.

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    ·   Bollards to the perimeter of the swale and Bioretention basin in Road A have been
        removed in favour of a barrier kerb with regular cut-outs. The upright barrier kerb is
        reinforced with a concrete kerb backing strip to limit damage from wheel contact.
    ·   Batter grades are amended with proposed extended detention depths to ensure the
        ponding depth in street tree pits and basins remains below the kerb invert line. Therefore,
        minor design storm kerb flow width/depth criteria in QUDM is a function of the bioretention
        overflow pit level and calculations are consistent with those provided on Drawings 1856-
        SW16-SW18
    ·   Street Tree pits are not proposed to be grated and shall function effectively and
        bioretention basins with WSUD species street trees for the subdivision works. Future
        development of Lot 3 and 7 on private Road C may require these to be grated with a future
        pedestrian application to the verge. The grates and restructure of the street tree basin
        surfaces would occur at this time when there is clear information on the end use of the
        road verges.

Item 36
If device sizes or extended detention depths are altered then provide an updated SWMP and
MUSIC modelling which demonstrates that the pollutant load reduction targets are met.

Response
Please refer to the below MUSIC model results screenshots and the attached MUSIC file to
demonstrate compliance with the NSC planning scheme and Qld SPP (2017) for water quality
outcomes in the proposed subdivision development.




        Figure 2: Updated MUSIC Model Layout and Results


Item 37
Provide an amended preliminary Construction Management Plan that addresses Council’s
concerns.

Response
Please refer to updated Construction Management Plan enclosed with this response. Traffic
control and regular site vehicles are still proposed to enter the construction site from the existing
constructed end of Hofmann Drive. Vehicle parking and site offices will be located on Proposed
Lot 4 as per the submitted TGS documents. Heavy construction vehicles and deliveries shall enter
the construction site from the existing roundabout stub on Walter Hay Drive.




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Additional Comments

Recent changes to supply chain in the civil construction industry have resulted in a significant
reduction in the availability of Reinforced Concrete Pipe (RCP) to the region. It is understood
that one supplier has effectively removed themselves from the SEQ market and the other main
supplier is struggling to meet the demand increase for their product.

We request that Fibre Reinforced Concrete Pipes be considered a suitable alternative to RCP
for this development with rubber ring joints still provided as per Clause 2(i)(xi) of SC6.7 PSP6 –
Engineering Standards in the Noosa Plan 2020.



If you wish to discuss this matter further, please contact Cameron Landreth on (07) 5443 8285.

Yours sincerely,




CAMERON LANDRETH - Director
BEng (Hons), NER, RPEQ 19358
For and behalf of;
BARLOW SHELLEY CONSULTING ENGINEERS (AUST) PTY LTD

Encl:
Updated Civil OPW Drawings (1856 R30-R71 Rev D; 1856 SW01-SW30 Rev D; 1856 T10-T15
Rev A)
Updated Construction Management Plan 1856-CMP-01 Version 2.0
MUSIC Model Rev 6.




 1856 – Stockwell Development Group – Noosa Civic                                         Page 7 of 7