What the ground in O'Connor tends to do
O'Connor is inner-north with ridge influence, and its blocks tend to combine a modest overall fall with established gardens that have been reshaped several times. The retaining is often incremental as a result: a terrace here, a garden edge there, built at different times and not designed as one system.
That incremental history is the thing to establish first. Where several small walls share a slope, they may be interacting, and a change to one can load another. Treat the sequence of levels as a whole and record how each one relates to the next, rather than assessing the wall that happens to have failed in isolation.
Access from Macarthur Avenue, Miller Street and Dryandra Street is typical inner north: reasonable street frontage, then a long side path to a rear terrace, frequently with steps in it. Measure that carry properly, including step heights, because a rear garden separated from the street by a flight of stairs changes both method and cost.
Access, water and boundaries here
Service routes on these older blocks are established and not always where current plans suggest. Mark visible pits and covers, and treat their positions as evidence to be confirmed rather than as a complete picture. Where a wall follows a boundary, the neighbouring ground level belongs in the record as well.
Ridge influence means water tends to move across these blocks rather than sitting on them, so the symptom to look for is scour and sediment movement rather than standing water. Follow the path it takes after rain, and note whether it arrives from the property above before it reaches your wall.
O'Connor ridge-influenced blocks can place walls close to mature gardens, service routes and neighbouring structures. Around Dryandra Street, a rear terrace may be separated from the street by stairs and a long side path. Measure that carry, mark visible service pits and include the neighbour's ground level when a wall follows the boundary.
O'Connor Ridge Nature Reserve, O'Connor Shops, O'Connor Cooperative School locate the wider area, and Lyneham, Turner, Bruce adjoin it. None of that substitutes for measurements taken on your own block.