Compiled Reference Documents - MCU24/0153 & OPW24/0202

Table 10: Structure 6-1 AEP1% inflows and outflows




In both the major and minor events, the climate change adjusted post development flows have been
effectively mitigated such that the outflows to the existing stormwater network are lower than the
predevelopment flow. It is therefore confirmed that Acceptable Outcome 2.4 of the water quality
and drainage code has been achieved.

The model also confirms that there is sufficient capacity in the external pit to take all flows from the
development. We trust that this Technical Memorandum, in conjunction with the amended civil
drawings, is sufficient to evidence to council that the stormwater quantity measures have been
designed to mitigate the 20% increase in rainfall allowing for climate change.

All other engineering items within the Decision Notice for application OPW24-0202 dated the 11th of
August 2025, have been addressed within the engineering drawings.

Please contact the undersigned for any further clarifications:

    ➢ Email- [email protected]
    ➢ Phone- 0451453640.




Eoin Whitmore, Associate Engineer
RPEQ Number: 31423
Date: 26/09/2025




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