 In July 2000, the City of Irvine, which owns of the marsh in the San Joaquin Wildlife Sanctuary, contributed a further $1.5 million to its restoration, along with contributions from the Audubon Society and the State of California.The remaining belong to the University of California and have been designated as the San Joaquin Freshwater Marsh Reserve.From north to south, the named tributaries of San Diego Creek are the La Cañada Channel (flowing from Laguna Canyon), Serrano Creek, Agua Chinon Creek, Bee Canyon Wash, Como Drain, Lyon Drain, Marshburn Channel, Coyote Canyon Channel, Peters Canyon Wash, Barranca Channel, Lane Channel, San Joaquin Wash, Sand Canyon Wash, and Bonita Creek.