The environment is one of the many things that makes MacMasters so special.
Cockrone Lagoon
Cockrone Lagoon is the most southern of the four coastal lagoons in Gosford. The lagoon has a surface area of approximately 0.38 km2 and a catchment area of 7.2 km2.
It is classed as a back-dune lagoon with an intermittently closed entrance.
Artificial entrance openings are carried when water height reaches a certain trigger level. This trigger level is higher than nearby lagoons because less urban development has encroached on the lagoon foreshore.
Information from https://www.cen.org.au/resources/gosford-lagoons/cockrone-lagoon-topmenu-111 and https://www.environment.nsw.gov.au/topics/water/estuaries/estuaries-of-nsw/cockrone-lagoon