Cal. Wat. Code § 8590.2
In acquiring interests in land necessary for the purposes specified in Section 8590 and notwithstanding the provisions of Section 8676, the board in determining whether to acquire in fee or easement may consider such additional uses as fish and wildlife enhancement and recreation if so requested by another state agency. Any such parcel acquired in fee shall be subject to the continuing jurisdiction of the board to insure that the primary purposes of flood control are served and to prevent any damage or interference with the flood control works for any public nuisances arising out of such additional uses and any increased costs of maintenance attributable to such additional uses shall be borne by the agency requesting such uses.
Nothing in this section shall be construed as authorizing the board to acquire any land over and above that necessary for the purposes specified in Section 8590.
Ca. Water Code § 8590.2