RIVERSIDE, CALIFORNIA.

SEC. 418. RIVERSIDE, CALIFORNIA. If the holder and owner of a leasehold mineral and royalty interest in the existing Prado Flood Control Basin in Riverside, California, requests the Administrator of General Services to exchange such interest for excess Federal property, the Administrator shall acquire such interest by exchange of excess Federal property. Such acquisition must be completed not later than 270 days after the date of such request. The Administrator shall undertake an evaluation and appraisal of an interest to be acquired under this section.