Rolling Hills Municipal Code Ch. 8.36 Floodplain Management Regulations

The Legislature of the State of California has in Government Code Sections 65302, 65560 and 65800 conferred upon local governments the authority to adopt regulations designed to promote the public health, safety, and general welfare of its citizenry. This chapter is enacted in order to establish the floodplain management regulations required under Title 44, Section 60 of the Code of Federal Regulations in order for the residents of Rolling Hills to be eligible to purchase flood insurance through the National Flood Insurance Program.

(Ord. 300 §2(part), 2006).

It is the purpose of this chapter to promote the public health, safety, and general welfare, and to minimize public and private losses due to flood conditions in specific areas by provisions designed to:

A. Protect human life and health;

B. Minimize expenditure of public money for costly flood control projects;

C. Minimize the need for rescue and relief efforts associated flooding and generally undertaken at the expense of the general public;

D. Minimize prolonged business interruptions;

E. Minimize damage to public facilities and utilities such as water and gas mains; electric, telephone and sewer lines; and streets and bridges located in areas of special flood hazard;

F. Help maintain a stable tax base by providing for the sound use and development of areas of special flood hazard so as to minimize future blighted areas caused by flood damage;

G. Ensure that potential buyers are notified that property is in an area of special flood hazard; and

H. Ensure that those who occupy the areas of special flood hazard assume responsibility for their actions.

(Ord. 300 §2(part), 2006).

Unless specifically defined below, words or phrases used in this chapter shall be interpreted so as to give them the meaning they have in common usage and to give this chapter its most reasonable application.

"Area of special flood hazard" means the land in the floodplain within a community subject to a one percent or greater chance of flooding in any given year.

"Base flood," means a flood, which has a one percent chance of being equaled or exceeded in any given year (also called the "100-year flood"). Base flood is the term used throughout this chapter.

Building. See "Structure."

"Development" means any man-made change to improved or unimproved real estate, including, but not limited to, buildings or other structures, mining, dredging, filling, grading, paving, excavation or drilling operations or storage of equipment or materials.

"Floodplain Administrator" is the community official designated by title to administer and enforce the floodplain management regulations.

"Floodplain management" means the operation of an overall program of corrective and preventive measures for reducing flood damage and preserving and enhancing, where possible, natural resources in the floodplain, including but not limited to emergency preparedness plans, flood control works, floodplain management regulations, and open space plans.

"Floodplain or flood-prone area" means any land area susceptible to being inundated by water from any source.

"Historic structure" means any structure that is:

1. Listed individually in the National Register of Historic Places (a listing maintained by the Department of Interior) or preliminarily determined by the Secretary of the Interior as meeting the requirements for individual listing on the National Register;

2. Certified or preliminarily determined by the Secretary of the Interior as contributing to the historical significance of a registered historic district or a district preliminarily determined by the Secretary to qualify as a registered historic district;

3. Individually listed on a state inventory of historic places in states with historic preservation programs which have been approved by the Secretary of Interior.

4. Individually listed on a local inventory of historic places in communities with historic preservation programs that have been certified either by an approved State program as determined by the Secretary of the Interior or directly by the Secretary of the Interior in states without approved programs.

"Manufactured home" means a structure, transportable in one or more sections, which is built on a permanent chassis and is designed for use with or without a permanent foundation when attached to the required utilities. The term "manufactured home" does not include a "recreational vehicle."

"Manufactured home park or subdivision" means a parcel (or contiguous parcels) of land divided into two or more manufactured home lots for rent or sale.

"New construction," for floodplain management purposes, means structures for which the "start of construction" commenced on or after August 26, 2006 and includes any subsequent improvements to such structures.

One-hundred-year flood or 100-year flood. See "Base flood."

"Recreational vehicle" means a vehicle, which is:

1. Built on a single chassis;

2. Four hundred square feet or less when measured at the largest horizontal projection;

3. Designed to be self-propelled or permanently towable by a light-duty truck; and

4. Designed primarily not for use as a permanent dwelling but as temporary living quarters for recreational, camping, travel, or seasonal use.

"Start of construction" includes substantial improvement and other proposed new development and means the date the building permit was issued, provided the actual start of construction, repair, reconstruction, rehabilitation, addition, placement, or other improvement was within one hundred eighty days from the date of the permit. The actual start means either the first placement of permanent construction of a structure on a site, such as the pouring of slab or footings, the installation of piles, the construction of columns, or any work beyond the stage of excavation; or the placement of a manufactured home on a foundation. Permanent construction does not include land preparation, such as clearing, grading, and filling; nor does it include the installation of streets and/or walkways; nor does it include excavation for a basement, footings, piers, or foundations or the erection of temporary forms; nor does it include the installation on the property of accessory buildings, such as garages or sheds not occupied as dwelling units or not part of the main structure. For a substantial improvement, the actual start of construction means the first alteration of any wall, ceiling, floor, or other structural part of a building, whether or not that alteration affects the external dimensions of the building.

"Structure" means a walled and roofed building that is principally above ground; this includes a gas or liquid storage tank or a manufactured home.

"Substantial damage" means damage of any origin sustained by a structure whereby the cost of restoring the structure to its before damaged condition would equal or exceed fifty percent of the market value of the structure before the damage occurred.

"Substantial improvement" means any reconstruction, rehabilitation, addition, or other proposed new development of a structure, the cost of which equals or exceeds fifty percent of the market value of the structure before the "start of construction" of the improvement. This term includes structures, which have incurred "substantial damage," regardless of the actual repair work performed. The term does not, however, include either:

1. Any project for improvement of a structure to correct existing violations or state or local health, sanitary, or safety code specifications which have been identified by the local code enforcement official and which are the minimum necessary to assure safe living conditions; or

2. Any alteration of a "historic structure," provided that the alteration would not preclude the structure's continued designation as a "historic structure."

"Zone D" means a FEMA mapped designation on the community's effective Flood Insurance Rate Map (FIRM) used for areas where there are possible but undetermined flood hazards, as no analysis of flood hazards has been conducted.

(Ord. 300 §2(part), 2006).

(Ord. No. 370, § 1, 4-12-2021; Ord. No. 370-U, § 1, 4-12-2021)

This chapter shall apply to all areas identified as flood-prone within the jurisdiction of the City of Rolling Hills.

(Ord. 300 §2(part), 2006).

The Floodplain Administrator or his or her designee, shall obtain, review, and reasonably utilize any base flood data available from other Federal or State Agencies or other source to identify flood-prone areas within the jurisdiction of the City of Rolling Hills.

The areas of special flood hazard identified by the Federal Emergency Management Agency (FEMA) in the "Flood Insurance Study (FIS) for Los Angeles County and Incorporated Areas" dated September 26, 2008, with accompanying Flood Insurance Rate Maps (FIRM's) and Flood Boundary and Floodway Maps (FBFM's), dated September 26, 2008, and all subsequent amendments and/or revisions, are hereby adopted by reference and declared to be a part of this ordinance. This FIS and attendant mapping is the minimum area of applicability of this ordinance and may be supplemented by studies for other areas which allow implementation of this ordinance and which are recommended to the City of Rolling Hills City Council by the Floodplain Administrator.

This data will be on file at the Rolling Hills Department of Planning, City Hall, No. 2 Portuguese Bend Road, Rolling Hills, California 90274.

(Ord. 300 §2(part), 2006).

(Ord. No. 370, § 2, 4-12-2021; Ord. No. 370-U, § 2, 4-12-2021)

No structure or land shall hereafter be constructed, located, extended, converted, or altered without full compliance with the terms of this chapter and other applicable regulations. Violation of the requirements (including violations of conditions and safeguards established in connection with conditions) shall constitute a misdemeanor. Nothing herein shall prevent the City Council from taking such lawful action as is necessary to prevent or remedy any violation.

(Ord. 300 §2(part), 2006).

This chapter is not intended to repeal, abrogate, or impair any existing easements, covenants, or deed restrictions. However, where this chapter and another chapter, easement, covenant, or deed restriction conflict or overlap, whichever imposes the more stringent restrictions shall prevail.

(Ord. 300 §2(part), 2006).

In the interpretation and application of this chapter, all provisions shall be:

A. Considered as minimum requirements;

B. Liberally construed in favor of the governing body; and

C. Deemed neither to limit nor repeal any other powers granted under state statutes.

(Ord. 300 §2(part), 2006).

The degree of flood protection required by this chapter is considered reasonable for regulatory purposes and is based on scientific and engineering considerations. Larger floods can and will occur on rare occasions. Flood heights may be increased by man-made or natural causes. This chapter does not imply that land outside the areas of special flood hazards or uses permitted within such areas will be free from flooding or flood damages. This chapter shall not create liability on the part of the City Council, any officer or employee thereof, the County of Los Angeles as designee of the Floodplain Administrator, the State of California, or the Federal Insurance Administration, Federal Emergency Management Agency, for any flood damages that result from reliance on this chapter or any administrative decision lawfully made hereunder.

(Ord. 300 §2(part), 2006).

A flood damage prevention permit shall be obtained for all proposed construction or other development in the community, including substantial damage, and the placement of manufactured homes, so that it may be determined whether such construction or other development is within flood-prone areas.

(Ord. 300 §2(part), 2006).

(Ord. No. 370, § 3, 4-12-2021; Ord. No. 370-U, § 3, 4-12-2021)

The City Manager, or his or her designee, is hereby appointed to administer, implement, and enforce this chapter by granting or denying flood damage prevention permits in accord with its provisions.

(Ord. 300 §2(part), 2006).

The duties and responsibilities of the Floodplain Administrator, or his or her designee, shall include, but not be limited to the following:

A. Permit Review. Review all flood damage prevention permit applications to determine:

1. Permit requirements of this chapter have been satisfied;

2. All other required State and Federal permits have been obtained; and

3. The site is reasonably safe from flooding.

B. Review and Use of Any Other Base Flood Data. The Floodplain Administrator, or his or her designee, shall obtain, review, and reasonably utilize any base flood data available from other Federal or State Agency or other source.

(Ord. 300 §2(part), 2006).

If a proposed building site is in a flood-prone area, including the Zone D area as identified on the effective Flood Insurance Rate Map, all new construction and substantial improvements, including manufactured homes, shall:

A. Be designed (or modified) and adequately anchored to prevent flotation, collapse, or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy;

B. Be constructed:

1. With materials and utility equipment resistant to flood damage,

2. Using methods and practices that minimize flood damage,

3. With electrical, heating, ventilation, plumbing and air conditioning equipment and other service facilities that are designed and/or located so as to prevent water from entering or accumulating within the components during conditions of flooding.

(Ord. 300 §2(part), 2006).

(Ord. No. 370, § 4, 4-12-2021; Ord. No. 370-U, § 4, 4-12-2021)

If a subdivision proposal or other proposed new development, including manufactured home parks or subdivisions, is in a flood-prone area, any such proposals shall be reviewed to assure that:

A. All such proposals are consistent with the need to minimize flood damage within the flood prone area;

B. All public utilities and facilities such as sewer, gas, electrical, and water systems are located and constructed to minimize or eliminate flood damage; and

C. Adequate drainage is provided to reduce exposure to flood hazards.

(Ord. 300 §2(part), 2006).

A. All new and replacement water supply and sanitary sewage systems shall be designed to minimize or eliminate:

1. Infiltration of flood waters into the systems; and

2. Discharge from the systems into floodwaters.

B. On-site waste disposal systems shall be located to avoid impairment to them, or contamination from them during flooding.

(Ord. 300 §2(part), 2006).

This chapter and the various parts thereof are hereby declared to be severable. Should any section of this chapter be declared by the courts to be unconstitutional or invalid, such decision shall not affect the validity of the chapter as a whole, or any portion thereof other than the section so declared to be unconstitutional or invalid.

(Ord. 300 §2(part), 2006).