State and Federal wildlife officials are unveiling a billion dollar plan to restore 15,000 acres of tidal marshland over the next half century. The project is the largest ever of its kind in California and it’s among the biggest habitat restoration efforts in United States. What were once the Cargill Salt Ponds are on their way to becoming restored tidal marshes, a plan the promises increased wildlife habitat, new public access trails, and improved flood protection for South Bay communities.