September 12, 2023
Hydrodynamic Separators & SPEL Stormceptor: How They Work
How hydrodynamic separators and vault systems like the SPEL Stormceptor treat stormwater, what they remove, and when NSW councils accept them.
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Updates from Contrive Consultants.
August 8, 2023
Sutherland Shire Stormwater & OSD Requirements Explained
Sutherland Shire Council stormwater and OSD requirements under DCP 2015 Chapter 38 - what builders of duplexes and townhouses need to provide.
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July 11, 2023
Penrith Council Stormwater, OSD & WSUD Requirements Guide
Penrith DCP 2014 stormwater rules explained - OSD, WSUD and drainage plan requirements for builders in Jordan Springs, Glenmore Park and Orchard…
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June 13, 2023
The UPRCT OSD Handbook: Why Western Sydney Councils Use It
How the Upper Parramatta River Catchment Trust's OSD Handbook became the template for western Sydney council detention requirements.
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May 16, 2023
Triplex & Multi-Dwelling Roof Drainage: When You Need an Engineer
When triplexes and multi-dwelling housing in NSW need a hydraulic engineer's stormwater plan - and what councils and certifiers expect in the…
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April 11, 2023
GPTs and Pit Inserts: Where the SPEL Stormsack Fits
How gross pollutant traps and pit inserts like the SPEL Stormsack work, what they remove, and where they belong in a NSW…
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March 14, 2023
Ku-ring-gai Council Stormwater & Drainage Requirements
How Ku-ring-gai Council assesses stormwater, OSD and drainage for new homes and duplexes - and why tree-sensitive design matters in this leafy…
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February 14, 2023
Hawkesbury Council Stormwater & Flood Requirements Guide
Stormwater and flood-prone land requirements in the Hawkesbury LGA - what builders in Windsor, Pitt Town and Vineyard need before lodging a…
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January 17, 2023
When Do You Need OSD in Sydney? Triggers by Development Type
New dwelling, duplex, granny flat or commercial build - when do Sydney councils require on-site detention? The common triggers explained.
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December 6, 2022
Duplex Stormwater & Roof Drainage Plans in Sydney: Dual Occupancy
Dual occupancy stormwater requirements explained - shared drainage, easements, detention and roof drainage plans certifiers expect for Sydney duplexes.
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