b'SMARTER, SHARPERCASE STUDY NO. 8 Sydney Metro Traction Substations Systems Connect This challenging design andThis substation upgrade project is taking place across five Sydney construct project involvesMetro stations including Campsie, Dulwich Hill, Canterbury, Lakemba and working closely with otherPunchbowl. They are being conducted near live rail tracks. contractors. The civil works inFacilitating future works at design stage particular requires Brefni toBrefni developed a number of innovations in the design phase work closely with thedesigned to facilitate future works by other contractors. This included electrical contractors.forming pockets in the concrete base slab that allowed the modular building structural steel to be installed, as the previous structure and Client: Systems Connectsteel design was not buildable. Value: $15.7 million Reusingexistingmaterialtoreducewaste Brefni proposed re-using site-generated spoil and approved road base Duration: Apr 2021ongoingas a backfill material, rather than stabilised sand. This led to client savings on disposal costs. It also limited the amount of truck movements associated with the site, saving time and minimising truck-related safety risks. Relevant featuresEnvironmentalinitiatives:recyclingrainwater Working adjacent to a water course (Cooks River) at the Canterbury site LIVE POWER SERVICESmeant stringent environmental controls were instituted at all times. Instead of treating and discharging rainwater that would accumulate RESTRICTED SITEACCESSonsite, Brefni collected and reused this water as dust suppression for sandstone works and conditioning backfill materials. Working with limited site storage MULTIPLE KEY STAKEHOLDERSBrefni has identified the limited space in the rail corridor as a challenge. Using alternative staging/site setups allows us to beat certain program timeframes; for example, by using trucks for bulk material loadout and twin feeding concrete agitators for concrete pours. BREFNI|18'