The areas in AR/A zone in reference to the Rio Hondo River and the A zone in reference to the San Gabriel River are areas which are not within the city of Pico Rivera's jurisdiction. Any activities in these areas shall be strictly limited to emergency or routine maintenance of the channels or bridges crossing these rivers.
In all other areas of special flood hazards the following standards are required:
A. 
Anchoring.
1. 
All new construction shall be adequately anchored to prevent flotation, collapse or lateral movement of the structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy.
2. 
All manufactured homes shall meet the anchoring standards of Article II of this chapter.
B. 
Construction Materials and Methods. All new construction shall 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.
C. 
Elevation and Floodproofing. (See Article II of this chapter for definitions)
1. 
Residential construction, shall have the lowest floor, including basement, in an AR zone, elevated above the highest adjacent grade to a height equal to the lower of either the AR base, flood elevation or the elevation that is three feet above the highest adjacent grade, but in no event shall be less than two feet above the highest adjacent grade.
Upon the completion of the structure, the elevation of the lowest floor including basement shall be certified by a registered professional engineer or surveyor, and verified by the community building inspector to be properly elevated. Such certification or verification shall be provided to the floodplain administrator.
2. 
Nonresidential construction, shall either be elevated to conform with subsection (C)(1) of this section or together with attendant utility and sanitary facilities:
a. 
Be floodproofed below the elevation recommended under subsection (C)(1) of this section or that the structure is watertight with walls substantially impermeable to the passage of water;
b. 
Have structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy; and
c. 
Be certified by a registered professional engineer or architect that the standards of subsection (C)(2) of this section are satisfied. Such certification shall be provided to the floodplain administrator.
3. 
All new construction with fully enclosed areas below the lowest floor (excluding basements) that are usable solely for parking of vehicles, building access or storage, and which are subject to flooding, shall be designed to automatically equalize hydrostatic flood forces on exterior walls by allowing for the entry and exit of floodwater. Designs for meeting this requirement must exceed the following minimum criteria:
a. 
Be certified by a registered professional engineer or architect; or
b. 
Have a minimum of two openings having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding. The bottom of all openings shall be no higher than one foot above grade. Openings may be equipped with screens, louvers, valves or other coverings or devices provided that they permit the automatic entry and exit of floodwater.
4. 
New manufactured homes shall also meet the standards in Section 15.50.540 of this chapter.
(Ord. 909 § 2, 1998)
A. 
All water supply and sanitary sewage systems to new construction shall be designed to minimize or eliminate:
1. 
Infiltration of flood waters into the systems; and
2. 
Discharge from the systems into flood waters.
B. 
On-site waste disposal systems to new construction shall be located to avoid impairment to them, or contamination from them during flooding.
(Ord. 909 § 2, 1998)
A. 
All preliminary subdivision proposals shall identify the flood hazard area and the elevation of the base flood.
B. 
All subdivision plans will provide the elevation of proposed structure(s) and pad(s). If the site is filled above the base flood elevation, the lowest floor and pad elevations shall be certified by a registered professional engineer or surveyor and provided to the floodplain administrator.
C. 
All subdivision proposals shall be consistent with the need to minimize flood damage.
D. 
All subdivision proposals shall have public utilities and facilities such as sewer, gas, electrical and water systems located and constructed to minimize flood damage.
E. 
All subdivisions shall provide adequate drainage to reduce exposure to flood hazards.
(Ord. 909 § 2, 1998)
All manufactured homes placed on sites located:
A. 
Outside of a manufactured home park or subdivision;
B. 
In a new manufactured home park or subdivision;
C. 
In an expansion to an existing manufactured home park or subdivision; or
D. 
In an existing manufactured home park or subdivision on a site upon which a manufactured home has incurred "substantial damage" as the result of a flood, shall be elevated on a permanent foundation such that the lowest floor of the manufactured home is elevated to or above the base flood elevation and be securely fastened to an adequately anchored foundation system to resist flotation collapse and lateral movement.
(Ord. 909 § 2, 1998)
All recreational vehicles:
A. 
Will either be on the site for fewer than 180 consecutive days, and be fully licensed and ready for highway use—a recreational vehicle is ready for highway use if it is on its wheels or jacking system, is attached to the site only by quick disconnect type utilities and security devices, and has no permanently attached additions; or
B. 
Meet the permit requirements of Section 15.50.490 of this chapter and the elevation and anchoring requirements for manufactured homes in Section 15.50.540(A) of this chapter.
(Ord. 909 § 2, 1998)