© Department of Lands 2008
The
closest I could get was the 1951 photo above. The first aerial survey
of greater Sydney was in 1943 for the purpose of road planning (well,
that didn't work, did it?) and that is available online from the
Department of Lands in an online viewer form for free, the site to try is
www.six.nsw.gov.au and you need to download and install the SIX viewer (free). The instructions to get to the 1943 maps are
here. The public use area now seems to start from
http://lite.maps.nsw.gov.au I
had problems getting to the 1943 maps last try but another person did
it OK the same day. So maybe finger trouble in my case. Ah, silly me, I
had installed the SIX Lite viewer, once I installed the proper full
featured SIX viewer it worked like the explanation page said it should.
The RTA also sells the CD of that 1943
survey for $40, but why bother if it's free from Lands.
Here's Fort Street School in 1943, that darn trench is there even then.
© Department of Lands 2008
Note
the traffic density and the size of the toll gates on the bridge. I
suspect the circular trench around the school was part of the original
traffic plan for the bridge that maybe included what is now the Cahill
Expressway, but completion was stalled by WW2.
More
digging is going on behind the scenes about the Spiral Cut as it
appears to be known in the records. There are photos in the Sydney
Archives of construction of the cutting under way in July 1939
but no other clues about it. The design of the Cahill Expressway was
not finalised until 1945. Dr Bradfield apparently proposed a plan for
Sydney as early as 1912/13 for an overhead roadway at the Quay and the Spiral Cut
started (maybe 1937/38 in my guess) some time after the Harbour Bridge
was built presumably as a prelude to getting that overhead road going.
A separate page may eventually happen talking about the history of the
Spiral Cut. The name (Spiral Cut or Circular Cut) seems to have been
given to it to differentiate it from "The Cut" which is the much earlier
Argyle Cut.
For photos go to
http://www.pictureaustralia.org/ and search for 'circular cut'.