Tentative order released for controversial Poseidon water project Poseidon Water plans to build a seawater desalination plant next to the AES Huntington Beach Generating Station. (Allen J. Schaben / Los Angeles Times) By Matt SzaboStaff Writer Print The Santa Ana Regional Water Board released a tentative order Friday detailing proposed revisions to Poseidon Water’s controversial proposed $1.4-billion water desalination project in Huntington Beach. The board’s tentative order would make Poseidon responsible for five mitigation projects, including four projects within the Bolsa Chica Wetlands and the restoration of a 41.5-acre rocky reef offshore of Palos Verdes. The four proposed wetlands projects include the long-term preservation of the wetland’s ocean inlet, restoration of the wetland’s intertidal shelf, restoration of the wetland’s muted tidal basin and creation of the muted tidal basin water circulating system.