The county Planning Department will act as the co-lead agency with the U.S. Bureau of Land Management to amend the state's Desert Conservation Area Plan and conduct an environmental impact study for the Imperial Sand Dunes Recreation Area.
Bureau documents state the management plan for the recreation area has been in place since 1987 and is outdated.
The changes follow three public meetings in September in Phoenix, San Diego and El Centro that the bureau staged to receive public input on changes to the recreation area.
According to the bureau's request documents, the update needs to include designation of the North Algodones Dunes as wilderness, changes in visitor use and the federal listing of Pierson's milk-vetch as a threatened species.
Pierson's milk-vetch is a silvery, short-lived perennial plant listed as an endangered species in 1998.
The county Board of Supervisors approved the bureau's request at its regular meeting Tuesday.
Also at the meeting, the board approved three resolutions that adopt Proposition 218 ballot procedures and set a public hearing for 10 a.m. Nov. 20 to determine the taxes for Gateway service plan area landowners.