Attachment 3 - Stormwater Management Plan

 SITE DETAILS

     2.1. Existing Site Description & Drainage
The existing site, known in real property terms as Lot 2 SP 215946, is located at 6 Martin St on the corner of Martin
Street and Avocet Parade. The site shares a common property area (Lot 0 GTP345) containing driveway and
landscaping with adjacent Lot 1 SP 215946. Both lots contain an existing residential dwelling, with the site having a
total area of 882.8m². The site adjoins residential allotments to the east and north, and Avocet Parade and Martin
Street to the west and south of the site respectively.


     2.2. Existing Drainage Patterns
The subject land is gently sloping, with typical grades of less than 5% falling north to south across the lot.
The run-off from the existing developed site typically drains as overland surface flows towards the road reserve to
the south. Due to the sandy soils present in the locality the run-off is likely to infiltrate as it discharges downstream
with only a portion of the run-off likely to reach the existing kerb and gutter to the south east of the subject site.

A grated trench drain across the driveway captures surface runoff from the pavement area, and an existing kerb
adaptor outlet was located at the southeast corner of the common property boundary which is expected to be the
outlet for the driveway and adjacent roof run-off. An existing drainage pit within the site is connected to roof run-off
from the existing dwelling, with the outlet pipe discharging towards Martin Street, however no outlet was observed.

Although contours indicate that upstream run-off from the adjacent site may enter across the property boundary,
the existing building present along the boundary of Lot 2 will divert the majority of runoff either west towards Avocet
Parade or to the east into an adjacent property. The upstream run-off is therefore expected to be minimal, and likely
to infiltrate into the site soils.




                                    Figure 2.1 - Site Locality Plan (Noosa Council Intramaps, 2022)




Project number 20220116
File RECOR Preliminary Stormwater Management Report - 20220116.docx, 2022-09-27                                Page 5 of 14
Revision 1


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