California Code, Water Code - WAT § 8610.5

(a)(1) The board shall adopt regulations relating to evidentiary hearings pursuant to Chapter 4.5 (commencing with Section 11400) of Part 1 of Division 3 of Title 2 of the Government Code.

(2) The board shall hold an evidentiary hearing for any matter that requires the issuance of a permit if the proposed work may significantly affect any element of the State Plan of Flood Control or if a formal protest against that permit has been lodged.

(3) The board may, by regulation, define types of encroachments that will not significantly affect any element of the State Plan of Flood Control.  Evidentiary hearings are not required for uncontested applications for those defined encroachments unless, in the judgment of the executive officer, there is a reasonable possibility that the project will have a significant effect on an adopted plan of flood control.

(4) The board may delegate approval of permits for encroachments that will not significantly affect any element of the State Plan of Flood Control to the executive officer.

(5) The board is not required to hold an evidentiary hearing before making a decision relating to general flood protection policy or planning.

(1) Evidence that the board admits into its record from any party, state or local public agency, or nongovernmental organization with expertise in flood or flood plain management.

(2) The best available science that relates to the scientific issues presented by the executive officer, legal counsel, the department, or other parties that raise credible scientific issues.

(3) Effects of the proposed decision on the entire State Plan of Flood Control.

(4) Effects of reasonably projected future events, including, but not limited to, changes in hydrology, climate, and development within the applicable watershed.