Attachment 3 - Revised Engineering Report (rec. 7.04.2025) MCU24-0165 & OPW24-0222

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The drainage channel and culvert structure at Rifle Street is shown in the following figures.




FIGURE 4: RIFLE STREET DRAINAGE CHANNEL, FROM POMONA CONNECTION ROAD LOOKING EAST




FIGURE 5: RIFLE STREET DRAINAGE CHANNEL, FROM RIFLE STREET CULVERT NEAR CREEK STREET
LOOKING WEST


5.2      External Catchments
Flows within School Street are directed East through a shallow open grass swale in the verge as shown
in Figure 6. Lots to the West appear to drain directly south towards Rifle Street. The proposed
development is not considered to change the conditions of this catchment with the point of discharge
remaining consistent in the developed case for these adjacent lots.
It is noted that future development of adjacent lots will result in surface levels being raised to match the
subject site adhering to minimum floor levels required by the 1% AEP flood event + freeboard.




 15 November 2024                                                                                            Page 7