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Hydraulic Engineering

Stormwater Drainage Design

Stormwater systems incorporate the in-ground roof water and stormwater network, including retention and/or detention systems from your on-site service points to the local authority-approved discharge point.

Inadequate stormwater drainage can cause major problems, from damaged carpets to major structural issues, as well as nuisance flows to other properties and even flooding.

Our design process for stormwater drainage includes:

  • Reviewing architectural plans
  • Drafting site layout
  • Technician review of site classification, site parameters (retaining walls etc), contour survey data, and client preferences (where applicable)
  • Registered professional engineer design report
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When is it required?

Builders, plumbers, owners, architects, and certifiers can avoid the risk of an under-performing drainage system being installed by commissioning one of our site-specific designs.

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What's included?

The PDF report is compiled and signed by a registered professional engineer. The design details typically include (where applicable):

  • Most suitable pipe layout from service point to discharge point
  • Recommended pipework articulation specifications
  • Pipe sizes, grades, invert levels, and cover requirements
  • Special system specifications (charged, sealed, or pumped systems)
  • Rainwater retention tanks
  • Stormwater detention tanks
  • In-ground infiltration systems (i.e. rubble pits)
  • Surface pits, strip, spoon, and swale drains

Stormwater experts

Whatever the challenge, we’ve probably come across it before. We deal with all the ‘what ifs’ — sites that fall away from the street, build-to-boundary sites, existing retaining walls, and much more.

Full service

You can enjoy a smoother, more efficient process by also engaging us for your structural, geotechnical, and foundation engineering needs, as well as soil testing and inspections.

High standards

We design to the highest quality, backed by our experienced engineers’ certification. You can be confident that your project meets all regulations and relevant Australian standards.

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One engineer for all your needs

Every building project is different, requiring a combination of engineering disciplines. From bottom to top, our engineers can work on soil testing and foundations, all the way up to frame and roof truss design and even inspections. We believe these shouldn’t be thought of as separate, unrelated services.

Whether you’re renovating, extending, building a brand new home, or putting in a pool, you can gain significant benefits from understanding (in advance) the full range of engineering services you might need — and from using the same engineer for all these services.
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Key advantages of integrated services

STA is a one-stop engineer with a service range that delivers three key advantages:

  • Save time and money

Pre-planning your engineering needs means you won’t have to keep re-booking an engineer when you need a particular service. It creates efficiencies that cut service times and save you money by pulling together the services you’ll need, at a lower overall price.

  • Enjoy engineering continuity

With all your engineering done by a single organisation, your consultants tap into a deeper knowledge of the site and the project, which leads to high quality outcomes, with more opportunities for innovative solutions.

  • Less risk, more reliability

While STA always takes legal responsibility for its engineering designs, an up-front engineering services package makes it easier to trust our work with a strong mutual commitment, and reduced risk of potential interruption or delay.

How it works

Engineering consideration – We help you think about your project in engineering terms. What specific services might you need?
Packaged plan – We develop a plan that packages up all the engineering services you need for your individual home or build project.
Prescheduled services – With each service pre-scheduled, we can work more closely with you over the life of the project.

Explore our engineering services

Whether you’re a builder, developer, architect or owner, STA has the size and range to cover every possibility, with a team of experts in every engineering specialty. Explore more specific info on:
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More on hydraulic engineering

Work with hydraulic engineering consultants who understand and manage all hydraulic aspects of your site, from flows and drainage, to sustainability and efficiency.
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