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 contact was Mr Darren Ikin 9725 0265.

To date 4 of these have been constructed (by others).  Site hydraulics were critical on two of the projects, which increased the scope to include surcharging arrangements and overland flow paths.  Some pre-GPT location shots are shown below.