Harbors and Navigation Code § 5820

Any portion of a county in this state, the exterior boundaries of which include a bay, harbor, inlet, or navigable water of the Pacific Ocean, may be formed into a district for the improvement or development of a harbor.

The work may include the dredging of channels, shipways, ship berths, anchorage places, and turning basins, and the construction of jetties, breakwaters, bulkheads, seawalls, wharves, ferry slips, and warehouses.