Consulting & Design

Our team offers a full range of engineering services including hydraulic and engineering reports, planning, flood modelling, due diligence, earthworks, roads, civil and stormwater design and construction documentation.  Stormwater harvesting design and documentation draws on our process, automation and mechanical engineering capabilities and integrated design delivered.

Our consulting is complimented by close association with suppliers who have proven to themselves in the industry. We have all the proprietary GPT operation and maintenance manuals, and can upgrade and update them specifically for your local government area.

2019 Design and Construct 5 Gross Pollution Traps and Graduated Trashracks

Tuggerah Lakes on the Central Coast have been the focal point for funding by federal, state and local government due to their significant environmental value.  The central coast community is also very zealous about the lakes and coastal environment.   […]

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2018 – 2019 Veolia Banksmeadow Waste Transfer Terminal (BTT) Audit, Design and Construction

Veolia Waste and Environmental Services operate under a strict EPA license requiring stormwater contaminated with leachate from operations to meet high standards prior to discharge. Modification of an existing stormwater detention basin was identified as an opportunity to more consistently […]

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2018 – 2019 North Sydney Council Concept & Detailed Design

North Sydney Council are forging ahead with plans to provide gross pollution treatment for over 80% of their LGA.  Optimal Stormwater where initially engaged to investigate and prepare concept designs for the upgrade of several of councils basic ‘litter basket’ […]

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2018 – 2019 Fairfield Council GPT Designs

Fairfield Council have been at the forefront of stormwater best practice for decades and early adopters of gross pollution traps.  Council highly values their waterways and creek systems and protection of these is a high priority and for Council.  A […]

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Central Coast Council Charmhaven & Long Jetty Depots Stormwater Infrastructure Audit and Management Plans.

Council Depots and Waste Depots are on the radar for many Councils to address stormwater management.  Industrial activities, waste management, plant maintenance and storage of construction generate high quantities of sediments, waste and debris and dust.  Optimal conducted a comprehensive […]

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Hornsby Shire Council – Design and Construct CDS P1518 Unit 1/4 GPT Projects

Optimal Stormwater was selected by Hornsby Shire Council to design and construct a new stormwater treatment solution upstream of a bioretention basin in Lyne Road Reserve, Cheltenham. Council identified that the existing, underperforming bioretention basin downstream was underperforming due to […]

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Hornsby Shire Council – Design and Construct CDS P1518 Unit with DD Sump 2/4 GPT Projects

Optimal Stormwater was selected by Hornsby Shire Council to design and construct a new stormwater treatment solution upstream of an ecologically sensitive creek within Neal Reserve, Sherbrook Road, Hornsby. The existing basket-type GPT was well undersized and causing upstream flooding […]

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Hornsby Shire Council – Design and Construct Vortcapture VC60 unit 3/4 GPT Projects

Optimal Stormwater was selected by Hornsby Shire Council to design and construct a new stormwater treatment solution upstream of a sensitive waterway in an industrial park on Salisbury Road, Hornsby Heights. Due to the relatively small catchment, extreme depth and […]

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Hornsby Shire Council – Design and Construct CDS P1009 Unit 4/4 GPT Projects

Optimal Stormwater was selected by Hornsby Shire Council to design and construct a new stormwater treatment solution upstream of an ecologically sensitive creek at Pike Road, Hornsby Heights. The existing Humegard GPT was severely underperforming, and Optimal Stormwater was able […]

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Lane Cove Council – Design and Construct VortCapture GPT

Optimal Stormwater was selected by Lane Cove to design and construct a GPT at Bent Lane, Greenwich. The site was earmarked for a GPT to help improve downstream water quality and flooding alleviation. The design was given to us as […]

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Ku-Ring-Gai Council – Cliff Oval Stormwater Harvesting Scheme

Staff from Optimal Stormwater undertook the detailed design for the Cliff Oval Stormwater Harvesting Scheme in Wahroonga. They also assisted in the construction works with Austexc to install the solution. The project aims to irrigate two ovals from water harvested […]

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Boorandara Council – Freeway Golf Course Stormwater Harvesting

  Optimal Stormwater was engaged to do the water balances and investigate 4 options regarding the feasibility for water reuse at the Golf Course. The four options included sewer mining, extraction from the Yarra under an existing licence and two […]

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Wonthaggi Stormwater Harvesting Design Project – Bass Coast Shire Council

Optimal Stormwater was selected for the design of a stormwater harvesting solution in Wonthaggi Recreational Reserve for Bass Coast Shire Council. The project involved catchment analysis, water use analysis, MUSIC modelling, water balances, primary, secondary and tertiary treatment, purpose designed […]

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Santa Rosa Park – Stormwater Harvesting for Ryde City Council

Optimal Stormwater was selected for the design of a stormwater harvesting solution in Santa Rosa Park for Ryde City Council. The project involved Optimal Stormwater analysing the available base and peak flow at the particular location, the capacity to deliver […]

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Leichhardt City Council – Birchgrove Oval GPT and Stormwater Harvesting

Council selected Optimal Stormwater to undertake the feasibility, then concept design, then detail design for a stormwater harvesting system at Birchgrove Oval near Balmain. The offtake and primary treatment is an area that many stormwater harvesting systems fail or do […]

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Debris Control Structures Concept Design – Wollongong

Optimal Stormwater was engaged by Wollongong City Council to undertake the debris control structures concept design for 15 sites in Wollongong. Staff at Optimal Stormwater & Henry & Hymas completed the TUFLOW flood modelling as part of the concept design […]

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Boondah Council Depot Stormwater Harvesting Design for Pittwater Council

Council approached Optimal Stormwater to do the design of a harvesting system at their Council works depot due to Optimal’s experience in stormwater treatment and stormwater harvesting. They needed it done very quickly, and valued the knowledge that Optimal Stormwater […]

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North Sydney Council Rainwater Harvesting Concept and Detail Designs

Optimal Stormwater was recommended to Council as one of the leaders in the area of stormwater harvesting, and asked to quote the feasibility, concept design and detail design of a niche harvesting project in Milsons Point, Sydney. The project involved […]

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Pittwater Council 8 Stormwater Harvesting Feasibility and Concept Designs

Optimal Stormwater was deemed to have the knowledge, skills and resources to assess the next 8 potential stormwater harvesting sites. Optimal Stormwater was chosen for the investigation, feasibility and concept design of the next 8 harvesting sites within Pittwater, based […]

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Birchgrove Park, Stormwater harvesting detailed design, Leichhardt Council, NSW

Optimal Stormwater have completed the stormwater harvesting feasibility study for Leichhardt Council in Sydney. Following this Optimal Stormwater was engaged to do the concept and detail design. The site has multiple constraints that are physical, political and fiscal. The solution […]

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Hornsby Shire Council – Trashrack Design

Optimal Stormwater was selected to do the design on 2 new trashracks very close to each other at Flametree Reserve at Cherrybrook, removing litter and debris from Nyrippin Creek. The site was hydraulically challenging in regards to both access, and […]

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Leichhardt Council GPT Design – King Georges Park

Council had engaged a tier one consulting firm that does everything to design them a GPT. They did this, tendered it, and all tenders were more than double the budget. Optimal Stormwater made some suggestions about sizing and relocation, and […]

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Design of the primary treatment (GPTs) for the next 3 stormwater harvesting projects at Auburn

Designs have been completed for all sites, and the first system has been built at Auburn Golf Course. The contact on the project is Siva Sivakumar. 9735 1225    The hydraulics at the first site were especially challenging, with a […]

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Fairfield City Council, Sizing, Siting and Detail Design of their next 7 GPTs

Based on the success of the previous project, Optimal Stormwater was once again selected to do the catchment analysis, sizing, siting, concept design, concept drawings, hydraulic analysis, MUSIC modelling, detail design, drawings for Construction and full specifications for their next […]

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From feasibility/concept stage, Optimal Stormwater then won the detail design of their next 6 GPTs

These were located at the sites listed: • Smithfield Main Drain P3018 CDS unit with double depth sump • Bellingers Drain, P3024 CDS unit • Bowdens Rd, P1512 CDS unit • Antonietta St, P1512 CDS unit • Stockdale Cres, 2x SMS GPTs The project […]

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