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.

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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Fairfield City Council, Sizing, Siting and Ballpark Costing for Multiple GPTs

With only 4 days to get an assessment done for the expenditure of $1M worth of GPTs, Fairfield Council contacted Murray Powell, to do a feasibility assessment on 10 sites. The process involved catchment analysis, GPT selection, sizing and location […]

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Optimal Stormwater have also recently completed the design of 5 of the next 7 GPTs for Blacktown City Council

Optimal Stormwater have also recently completed the design of 5 of the next 7 GPTs for Blacktown City Council • North Parade, P3024 CDS unit • Rooty Hill Rd, South, P3018 CDS unit, with a double depth sump • Luxford […]

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Camden Council – Concept and Detail design of 2 new GPTs

Optimal Stormwater was selected to design the next 2 GPTs for Camden Council. Whilst about 20 companies tendered on the project, Optimal Stormwater had more experience than all of them, and had very competitive rates. The sites had been identified […]

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Wyong Shire Council – Concept and Detail Design of 3 trashracks

Optimal Stormwater was recently engaged to do the design of 3x “dry trap GPTs” (Trashracks) for Wyong Shire Council. The sites had existing old submerged trashracks that didn’t work, and Council wanted to upgrade them to devices which would not […]

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Sutherland Shire Council – Easement Drainage Works, Waring St Caringbah

Optimal Stormwater were engaged by Sutherland Shire Council to undertake complicated easement drainage works through a property where the easement alignment did not match the natural drainage slope. Optimal Stormwater designed and documented all works, including design for casted a […]

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