Sonoma Municipal Code Art. XI Subdivisions

Subdivision proposals in flood hazard areas, including proposals for manufactured home parks and subdivisions, shall be reviewed to determine that:

A. Such proposals are consistent with the need to minimize flood damage and will be reasonably safe from flooding.

B. All public utilities and facilities, such as sewer, gas, electric, communications, and water systems are located and constructed to minimize or eliminate flood damage in accordance with SMC 14.25.550 and 14.25.560, as applicable, and appropriate codes.

C. Adequate drainage is provided to reduce exposure to flood hazards; in zones AH and AO, adequate drainage paths shall be provided to guide floodwater around and away from proposed structures. (Ord. 11-2022 § 2, 2022).

In addition to the requirements of SMC 14.25.520, where any portion of proposed subdivisions, including proposals for manufactured home parks and subdivisions, lies within a flood hazard area, the following shall be required:

A. The flood hazard area, including floodways, as appropriate, shall be delineated on preliminary subdivision plats.

B. Where the subdivision has more than 50 lots or is larger than five acres and base flood elevations are not included on the FIRM, the base flood elevations determined in accordance with SMC 14.25.270(A).

C. When, as part of a proposed subdivision, fill will be placed to support buildings, the fill shall be placed in accordance with the building code and approval of the subdivision shall require submission of as-built elevations for each filled pad certified by a licensed land surveyor or registered civil engineer. (Ord. 11-2022 § 2, 2022).