CA Civ Proc Code Section 1240.120

(a)

Subject to any other statute relating to the acquisition of property, any person authorized to acquire property for a particular use by eminent domain may exercise the power of eminent domain to acquire property necessary to carry out and make effective the principal purpose involved including but not limited to property to be used for the protection or preservation of the attractiveness, safety, and usefulness of the project.

(b)

Subject to any applicable procedures governing the disposition of property, a person may acquire property under subdivision (a) with the intent to sell, lease, exchange, or otherwise dispose of the property, or an interest therein, subject to such reservations or restrictions as are necessary to protect or preserve the attractiveness, safety, and usefulness of the project.