SoakwellsPolypropylene SoakwellsConcrete SoakwellsPipe Camera Inspections PerthSoakwell Installers PerthWhat is a soakwell?Photos of SoakwellsSoakwells Information & MythsSoakwells PerthSOAKWELLS PERTH SUBURBSSoakwells FAQQuotesTestimonialsGalleryContact BlogGrill Stormwater System vs Direct ConnectionSoakwells Perth Bad Example of DrainageWhy Do You Need Soakwells Drainage?DIY Soakwells VS PRO SoakwellsAt What Stage Should Soakwells Perth Be InstalledSoakwells For Home Owners.Perth Soakwells InstallationPerth Soakwells CompactionPolypropylene SoakwellsPerth Soakwells 2018Installation Of Side Entry PitQuality Service Soakwells PerthBad Storm Water Drainage Installation and How It Will Cost You MoreSoakwells & Stormwater For new HomesWhat Is A Soakwell?Perth Soakwells Wins 2015 WOMO AwardSoakwells Perth | Soakwell Installation in StreetWeather Conditions PerthDescribing a soakwell Installation in Perth, Western AustraliaThe Relationship Between Plumbers and Stormwater Drainers in Home Construction: Working Together or Against Each Other? | Perth SoakwellsAbout UsMission StatementOur SEO ConsultantSoakwells Shop
DOWNLOAD COCKBURN STORMWATER

CITY OF COCKBURN

STORMWATER DRAINAGE AND SOAKWELL REQUIREMENTS FOR THE FOLLOWING SUBURBS


Atwell
Aubin Grove
Beeliar
Bibra Lake
Cockburn Central
Coogee
Coolbellup
Hamilton Hill
Hammond Park
Henderson
Jandakot
Leeming
Munster
North Coogee
North Lake
South Lake
Spearwood
Success
Wattleup
Yangebup

SOAKWELLS CITY OF COCKBURN

GUIDE TO THE PROVISION OF STORMWATER SOAKWELLS IN SANDY SOILS AT THE LOW POINT OF A DRAINAGE CATCHMENT NOT EXCEEDING 10,000M2
NOTES:



A. The Guide shall not be used for any other purposes except the disposal of stormwater on a single residential/ commercial/ industrial site.


B. If a catchment area exceeds 10,000m2, the stormwater drainage sump shall be designed in accordance with “Australian Rainfall and Runoff”, the Institution of Engineers, Australia 1987 and/or any reputable drainage calculation program that is satisfactory to the City of Cockburn such as the “PCSump” software program, by Main Roads Western Australia.

C. Regular removal of debris and silting material from soakwells at an interval not more than 3 years is required. This statement must be included in all drainage management plans submitted to council for approval.


DESIGN PROCEDURE:
1. Define stormwater drainage catchments within the property boundaries and mark them on a drawing preferably at a scale of 1:200, showing the existing and proposed contour levels, buildings and car parks.
2. Calculate the impervious area (e.g. rooftops, bitumen/concrete/brick paving or hardstanding areas including car parks) of each drainage catchment as defined above.
3. UsetheCityofCockburnsempiricalformula,namely:
V = A 80 Where A is the impervious area of a catchment measured in square metres; m2
And V is the required soakage volume of that catchment measured in cubic metres; m3 4. Decide what type and size of soakwells are to be installed; for example 1800mm
diameter and 1800 mm deep. 5. Therequirednumberofsoakwellscanbecalculatedasfollows:N = 1000 x V S
Where N is the number of soakwells. And S is the volume of a single soakwell
Notes: 1. Thenumberofsoakwellsisalwaysroundeduptothenearestwholenumber. 2. WhereNisgreaterthan1,allsoakwellswithinthecatchmentshallbelinkedtogetherby
drainage pipes, the diameter of which shall not be less than 100mm.
Example:
The rooftop area is 15.24m x 36.50m = 556m2 The required soakage volume is 556 80 = 6.95m3 Select 1200mm diameter x 1200mm deep soakwells Table 1 shows that this soakwell has a volume of 1357 litres The required number of soakwells is 6.95 x 1000 / 1357 = 5