19660 OPW26-0033 - response to info request

Response

As per our discussions and emails with Daniel Epps, we consider that the stormwater design
provided does comply with conditions 37 & 38 of the higher order approval. In addition, we have
checked Council's PSP for Stormwater design standards that apply and it refers to QUDM
(extract below - item 1 (a) (i)). QUDM requires urban drainage in low density areas to be
designed to convey Q2 (AEP 39%) - extract attached (table 7.3.1).

PLANNING SCHEME EXTRACT




QUDM EXTRACT




As such, the HGL shown on our long section drawings for a Q2 event is the correct design
event and confirms that the pits downstream of pit 6/A will not surcharge. We have removed
reference to surcharge pits on the long section which was a drafting error.
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                                                                     Tod Job Number: 19660-OPW2-A