Another consultant had proposed a Baramy trap or equivalent, and Optimal Stormwater tendered for their own design, and won the project with a superior design, and lower overall costs. The trash rack is one of the longest in Sydney, and […]

Optimal Stormwater was selected for the construction of a stormwater harvesting solution in Waterloo at Waterloo Oval for the City of Sydney. The project involved a drop offtake from the City of Sydney’s 600mm stormwater drain, with gravity feed into […]

Optimal Stormwater was engaged to provide $1.2M worth of stormwater harvesting works in Sydney. Optimal Stormwater was selected because of our depth of understanding in regards to the water balance and limitations with the concept put forward. The proposed (and […]

Another consultant had done a very detailed design, but when it went to tender, all bids were massively above Council’s budget. However, Optimal Stormwater put in an alternative tender with some very cost effective options, that really appealed to Council, […]

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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

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, […]

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 […]

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 […]

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 […]

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 […]

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 […]