Construction

Optimal Stormwater design and construction projects deliver quality solutions for reliable performance, safe and practical operation and maintenance and balanced operating cost.  Optimal design, construct and operate under third party quality assured Integrated Management System (IMS) Standards AS/NZS ISO 9001:2016 & AS/NZS ISO 14001:2016 & AS/NZS 4801:2001

We prepare comprehensive construction methodologies, shoring design, pipeline and hydraulic specification, utility protect plans, flow management plans, pedestrian and traffic safe work methods statement, site induction, environmental management plans and community consultation are standard features of our construction projects.

Sutherland Shire Council Cronulla Beach Vertical Pipe Replacement

Optimal Stormwater undertook challenging stormwater rectification works at the rear of Ozone Street, Cronulla which involved the design and construction of a 14m pipe, 10m of which was vertical down the cliff face to an existing ocean outlet. Optimal Stormwater […]

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GPT Installation for two CDS units at De Freitas Wetland, Fairfield

Due to our extensive experience, Optimal Stormwater was selected to install two CDS units for Enviropacific, as part of a much larger wetland upgrading project for Fairfield Council. The smaller southern unit was deeper, but went in easily. It was […]

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Pirrama Park, Alexandra Oval, Waterloo Oval, Stormwater Harvesting Design for City of Sydney

At Pirrama Park, an extension of the existing storage was designed. This was a 200kL Humes Rainvault storage system. We also designed access points, rising mains, plus additional communication lines. At Alexandria Oval, we did a complete redesign of the […]

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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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Cronulla Park Stormwater Harvesting and Reuse Scheme, Sutherland Shire Council

The Optimal Stormwater staff that also work with Henry & Hymas were awarded the design of a stormwater harvesting reuse scheme at Cronulla Park. The design included primary, secondary and tertiary treatment to achieve the desired outcome of irrigation without […]

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Stormwater Harvesting Tank for Ku ring gai Council

Optimal Stormwater won the design and construction of a reasonably small harvesting system for the Kogarah Council depot at Carlton. A previous (unsuccessful) harvesting system was in place on a Sydney Water channel nearby, and Optimal Stormwater was selected to […]

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Stormwater Harvesting at Myimbarr Wetlands with Shellharbour City Council

Optimal Stormwater was firstly engaged to do a peer review of another consultant’s design when costs blew out. As a consequence of the recommendations, Optimal was engaged to do a redesign of the project. The solution was innovative and involved […]

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Alexandria Oval – Stormwater Harvesting for City of Sydney

Optimal Stormwater was selected for the construction of a stormwater harvesting solution in Alexandria at Alexandria Oval for the City of Sydney. The project involved a drop offtake from a Sydney Water covered stormwater culvert, with gravity feed into an […]

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Artarmon Reserve – Stormwater Harvesting for Willoughby City Council

Optimal Stormwater was selected for the design of a stormwater harvesting solution in Artarmon Reserve for Willoughby City Council. The project had a years’ worth of flow and water quality monitoring which Council provided. Optimal Stormwater provided an innovative design […]

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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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Design and Construction of the Offtake, diversion and primary treatment for future Stormwater Harvesting at Beresfield Golf Course, for Newcastle City Council

Optimal Stormwater was selected to do a GPT comparison for the treatment and reuse at Beresfield Golf Course. The works included the assessment of the future flow direction, capacity, outlet location, and of course treatment. Council selected the P2018 CDS […]

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Model Yacht Pond

Optimal Stormwater were engaged by Antoun Civil to install a CDS Gross Pollution Trap on the main drain entering the Model Yacht Pond at Centennial Park. The CDS is to replace an existing 1970’s style trash rack and sediment trap […]

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Latrobe City Council – D&C GPT for Industrial catchment

Optimal Stormwater put forward 7 GPT options for consideration as part of the tendering process for this project, and were subsequently awarded the design and construction of a P1512 CDS unit. The heritage railway overpass, land ownership, Vic Roads requirements, […]

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GPT Installation for another CDS unit at Kensington Pond for Centennial Park

Based on the success of the previous works, Optimal Stormwater was once again selected to do the GPT installation for their next pond pretreatment. And once again the design was completely useless, full of error and oversights, and Optimal Stormwater […]

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GPT Design, Supply and Installation for Newcastle City Council at Merewether

Optimal Stormwater was selected to do the investigation and design of a GPT to go into the carpark behind Newcastle Council’s most famous beach. A P2018 CDS unit was selected for a number of reasons, and then detailed design and […]

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Stormwater Treatment at Model Yacht Pond, Centennial Park, Sydney

Optimal Stormwater was previously involved in the design and installation of all the GPTs in Centennial Park, and in the catchments pre-treating Centennial Park. Another consultant had designed the pond, so the GPT review was added to that project. Optimal […]

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Design and Construction of a CDS Gross Pollutant Trap, Hunter Park, Mosman

Henry & Hymas undertook site investigations of the drainage system (location, levels and conditions of pits and pipes) and hydraulic design for a CDS Gross Pollutant Trap to be installed in Hunter Pk, Balmoral as part of Mosman Council’s Stormwater […]

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Auburn Council, D&C of the Botanic P2018 CDS Unit

Optimal Stormwater completed the Design & Construction of yet another CDS unit at Auburn. This one was complex to locate and design, downstream of the Auburn Botanic Gardens, and treating a significant catchment. The site was tidal, and the drop […]

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Sutherland Shire Council Design and Construct (and fix) GPT’s

Sutherland Shire Council also engaged Optimal Stormwater to design a submerged trash rack GPT at Kurnell, which was the only option due to incredible hydraulic constraints. They also engaged Optimal Stormwater to fix a bypass capacity issue they had with […]

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Sutherland Shire Council Design and Construct GPT’s at Bundeena

Sutherland Shire Council wanted to treat a 7ha catchment at Bundeena, draining to the creek/wetland behind the town. Optimal Stormwater proposed a graduated trashrack for this site, based on the type of pollutants, their loading and the cleaning methods available. […]

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Blacktown City Council – Rooty Hill & Popondetta GPT construction

Optimal Stormwater has also recently built two large CDS units for Blacktown City Council – the Rooty Hill Rd one (designed by Optimal), and another CDS unit at Popondetta (which ended up being re-designed by Optimal). The construction on these […]

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Blacktown City Council 4 GPTs Design and Construct

Murray Powell teamed up with another consultant group on this project. Murray provided the concept design, location, sizing, siting, coordinated the drawings, suppliers and subcontractors. He did the detail design and project management of the project’s delivery for 4 large […]

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Sutherland Shire Council Design and Construct CDS unit at Cronulla

Optimal Stormwater did the feasibility and concept design for a CDS unit gross pollutant trap for a small catchment above Cronulla beach. Based on the results of this Optimal was invited to do the detail design and specification for the […]

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Waterloo Oval Stormwater harvesting pretreatment

Optimal Stormwater was engaged to do the construction of a large stormwater harvesting project at Waterloo in Sydney. City of Sydney are the client and the CDS unit GPT on the project was a P1009. Optimal have extensive experience with […]

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