Final Engineering services report _62 Lake Macdonald Drive · OPW25/0057

3.5     INTERNAL STREETS

The road reserve width of the proposed internal roadway is 23.0 m wide, which includes a 10.0 m vegetated buffer on
the eastern side and a 6.775 m verge on the western side (new lot frontage side). The geometric design of the internal
development roads is to be nominal 6.0 m wide with a 1.0 m widening applied to the inside curve of the initial bend,
and 0.5 m widening to the inside curves of the ‘S’ bend.

The road is generally in accordance with the Noosa Plan Engineering Design Standards policy and Austroads Guide to
Road Design.

3.6     STREET LIGHTING, ELECTRICAL AND TELECOMMUNICATIONS

Street lighting installations on roads, within the development and where proposed along external road frontages of
the development, will be designed and erected in accordance with the Council’s Planning Scheme Policy SC6.7 and
Australian Standards AS1158.

Underground electrical and telecommunications connections will need to be provided to each proposed allotment. A
review of the existing electricity and comms is outside the scope of this report.

Street lighting, electrical and telecommunications are to be designed and assessed through an individual Operation
Works application.

3.7     PATHWAYS AND CYCLEWAYS

A 2.0 m wide shared pathway is proposed for the length of the new internal road, with connectivity to the existing
path network along Lake Macdonald Drive. The proposed widening of Lake Macdonald Dr will include the re-alignment
of the existing path and cut-through pedestrian crossing at the proposed traffic island. This ensures existing path
connectivity is maintained.

3.8     FLOODING AND STORMWATER

There has been no Flood Impact Assessment completed within the scope of this report. Council has provided a Flood
Hazard Assessment completed by HydraLogic dated 4 September 2024 in support of the development, for further
information refer to Appendix A.

3.8.1   Flood Hazard Assessment

The Flood Hazard Assessment identifies the intersection has a 10 % AEP flood immunity, while less frequent events
overtop the roadway with varying levels of flood hazard classification and lengths of inundation.

A sensitivity analysis of the culverts under Lake Macdonald Drive demonstrated that should a significant blockage of
the culverts occur during a major rainfall event, the depths of inundation across the culvert would not be expected to
significantly change.

3.8.2   Localised Flooding

Except for a localised area on the north-eastern corner of the site (within the proposed drainage reserve), all levels
are above the Council flood inundation mapping. Refer to Figure 5 for further details. Minimum lot levels will be based
on the latest Council flood mapping.




62 Lake Macdonald Drive, Cooroy – Engineering Services Report                                                  Page 6
233467 | M24-1037Rpt – Issue A – April 2025