From the Maitland Mercury report:
The Mount Pleasant Street and surrounds were the area worst ravaged by the 1955 flood and is the focus of the fifth Walk and Talk flood series Mr Bogan developed in conjunction with the Hunter-Central Rivers Catchment Management Authority. After the 1955 flood, the government outlawed building in that area and it is now part of the mitigation scheme and the Oakhampton spillway.
Full article by Briony Snedden available at: Maitland Mercury, 09 Jun, 2011.