Swan

Soakwell Capacity
Volume Required = 0.0122Ac cu m where Ac is the impervious (roof) area in square metres

SOAKWELL SIZE

Volume (m3)

Impervious area served (m2)
Diameter (m)
Depth (m)
0.6
0.6
0.170
13.90
0.6
1.2
0.339
27.80
0.9
0.6
0.382
31.3
0.9
0.9
0.573
46.9
0.9
1.8
1.145
93.9
1.05
1.05
0.909
74.5
1.2
1.2
1.357
111.2
1.5
1.2
2.121
173.8
1.8
1.2
3.054
250.3
1.8
1.8
4.580
375.4
Notes:

Soakwell Size
1. The values are based on 1 in 5 year storm and it is assumed that the soakwell base is above the groundwater table in clean sand at least 5m thick above impervious soil layer.
2. Capacity will be reduced accordingly where the groundwater table rises above the base, in which case soakwells may not be suitable.
3. This table is provided as a guide only and Council is not responsible for any damages from flooding due to the use of the values given in this table .
4. Values are based on concrete soakwells with angled holes around the sides (Concrete
Louvred Soakwells).
5. A minimum clearance of 1.8m is required from soakwells to buildings and property boundaries.