UPDATED 16.5.23 - 20210153 Maple St SWMP

 SITE DETAILS

     2.1. Existing Site Description
The existing site is made up of 4 Lots: Lot 15 C 5605, Lot 1 RP 99323, and Lot 2 RP 99323 with frontage
to Maple Street, and Lot 18 C 5605 fronting Myall Street. The existing site contains two dwellings and
two sheds and the lots cover a combined area of 3,118m². This area is to be reconfigured into two
new lots, consisting of a lot containing the existing dwelling on Maple Street, which is to be retained,
and the remaining lot which is proposed for the development. Refer to the Town Planning report for
details of this reconfiguration.

The subject land falls typically east towards Myall Street at grades varying across the site. Towards
the eastern frontage, the site slopes at approximately 10%. To the south-west of the site fronting
Maple Street, the ground slopes at between 4% to 6%, while the north-western corner of the site has
typically level grades of around 1%.


     2.2. Existing Drainage Patterns
The run-off from the site typically drains as overland surface flows towards the eastern frontage of the
site. Within Lot 15 C 5605, Lot 1 RP 99323, and Lot 2 RP 99323 a small channel was observed which
appears to convey roof run-off from a downpipe of the existing building towards a dilapidated
drainage line falling towards Maple Street however the outlet into the kerb and gutter system was
blocked with dirt upon inspection, and it is unlikely that the outlet remains operational with water
expected to backup and discharge as overland run-off.
Two existing field pits were identified in the survey on Lot 18 C 560, and several stormwater outlet
points were observed to discharge from the retaining wall on the property boundary with Myall Street
outletting directly into the verge. Roof run-off from the building is also understood to discharge via
these outlets.

The surface run-off will drain towards the east into Myall Street, where a downstream kerb inlet pit is
the nearest stormwater infrastructure and currently point of collection for the existing run-off.




Project number 20210153
File RECOR Preliminary Stormwater Management Report - 20210153.docx, 2022-03-31                                 Page 7 of 27
Revision 1

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