Cal. SHC § 8340

In a proceeding to vacate a street or highway:

(a) A public entity may reserve and except from the vacation the easement and right at any time, or from time to time, to construct, maintain, operate, replace, remove, and renew sanitary sewers and storm drains and appurtenant structures in, upon, over, and across a street or highway proposed to be vacated and, pursuant to any existing franchise or renewals thereof, or otherwise, to construct, maintain, operate, replace, remove, renew, and enlarge lines of pipe, conduits, cables, wires, poles, and other convenient structures, equipment, and fixtures for the operation of gas pipelines, telegraphic and telephone lines, railroad lines, and for the transportation or distribution of electric energy, petroleum and its products, ammonia, and water, and for incidental purposes, including access to protect these works from all hazards in, upon, and over the street or highway proposed to be vacated.

(b) A local agency may reserve and except from vacation an easement for a future street or highway, unless the local agency finds that the street or highway is unnecessary for prospective public use.

(c) If there are in-place public utility facilities that are in use, a public entity shall, unless the legislative body determines the public convenience and necessity otherwise require, reserve, and except from the vacation any easement and right necessary to maintain, operate, replace, remove, or renew the public utility facilities.

(d) A public entity may reserve and except from the vacation, or may grant to another state or local public agency, an easement and right, at any time or from time to time, to construct, maintain, operate, replace, remove, and renew vehicular or nonvehicular trails for use by the public in, upon, over, and across a street or highway proposed to be vacated.