Post the earthquakes land has sunk and in this case the track is below high tide level. It would have been at least 500mm above the highest tide level prior to the recent earthquakes that started on 04/09/10.
All this is "red zone" after the earthquakes and has to be demolished. The roof of my "old" house (now owned by the government) can be seen between the third and fourth river-side houses.
Water from the river at high tide crosses Evans Avenue and enters a now abandoned "red zone" house via the garage. Next door (to the left) is the garage containing a car that was destroyed by fire last week (see earlier photos).
There are occasional sewerage spills into the Avon River while all the sewer and road repairs are carried out. This rock wall was level and well above high tide level prior to the eathquakes. All the houses that can been seen here (except for those on the distant Port Hills) are in the suburban "red zone" and are still to be demolished.