1. (a) New residential development of five or more parcels shall be protected through floodproofing to a level 12 inches above the 100-year base flood elevation, plus sufficient additional elevation to protect against a 55-inch rise in sea level at the Golden Gate, unless the development is located within:

   1. (1) Areas that city or county general plans, as of May 16, 2013, designate for development in cities or their spheres of influence;
   2. (2) Areas within Contra Costa County's 2006 voter-approved urban limit line, except Bethel Island;
   3. (3) Areas within the Mountain House General Plan Community Boundary in San Joaquin County; or
   4. (4) The unincorporated Delta towns of Clarksburg, Courtland, Hood, Locke, Ryde, and Walnut Grove, as shown in Appendix 7.
2. (b) For purposes of Water Code section 85057.5(a)(3) and section 5001(o)(1)(E) of this Chapter, this policy covers a proposed action that involves new residential development of five or more parcels that is not located within the areas described in subsection (a).

Note: Authority cited: Section 85210(i), Water Code. Reference: Sections 85020, 85300, 85305 and 85306, Water Code.

History

1. New section filed 8-7-2013; operative 9-1-2013 pursuant to Government Code section 11343.4(b)(3) (Register 2013, No. 32).

2. Change without regulatory effect amending subsection (b) filed 2-29-2024 pursuant to section 100, title 1, California Code of Regulations (Register 2024, No. 9).

3. Amendment of subsection (b) filed 2-27-2025; operative 4-1-2025 (Register 2025, No. 9).