Fortunately, a long history of proposed and attempted developments of the area have left the salt marsh and mangrove areas relatively untouched. Thomas Holt, an early owner of the land, tried to make the area more suitable for sheep raising by attaching bags of Buffalo Grass seed (Stenotaphrum secundatum) round the necks of his flock and turning them loose, thus introducing one of the first and most persistent weeds to the area. The sheep raising experiment failed.
The causeway was built just after the Second World War to service a radar station on the point and has continued to be used by the holders of the oyster leases in the bays to either side of the point. The causeway was constructed by scooping up sand along its sides and then adding road base and gravel to the top of the mound formed. The ditches which remained when the sand was removed have led to the establishment of the mangroves which fringe the causeway.
For some time the salt marsh area was held as mining leases by a number of sand mining companies, however all have now been bought out and the area is under the control of NPWS. The Towra Point Nature Reserve is covered by the Ramsar international convention for the protection of wetlands and is an important refuge for migratory birds.
View is from the east end of the causeway near the edge of the Casuarina zone, looking south towards Woolooware Bay. With the exception of accumulations of flotsam and jetsam, the salt marsh area is relatively pristine in condition.
The banks of the causeway are much overgrown by weeds but some attempt is being made by the NPWS to replace them by more suitable species of the local flora.