These adjacent reserves were amalgamated on 27 June 2012, in order to improve the biodiversity management in the built-up area.

It also contains a large portion of the critically endangered lowland habitats remaining in Cape Town.

The central feature in the Table Bay Nature Reserve is the Rietvlei wetland system.

The Rietvlei Wetlands and Milnerton Lagoon were proclaimed as a Nature Area on 3 August 1984, in proclamation number 1632 of Provincial Gazette No.

The City of Cape Town manages these two Erven on a 99-year lease for the purposes of nature conservation.