Unless specifically defined in this section, 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.
"Appeal"means a request for a review of the Building Official's and/or City Engineer's interpretation of any provision of this chapter or a request for a Flood Zone Exception.
"Area of shallow flooding"means a designated AR (with base flood depth) Zone on the Flood Insurance Rate Map (FIRM). The base flood depths range from one to three feet; a clearly defined channel does not exist; the path of flooding is unpredictable and indeterminate; and velocity flow may be evident. Such flow is characterized by ponding or sheet flow.
"AR Zone"means a special flood hazard area that results from the decertification of a previously accredited flood protection system that is determined to be in the process of being restored to provide a 100-year or greater level of flood protection.
"As-graded"is the extent of surface conditions on completion of grading.
"Base flood"means the flood which has a 1% chance of being equaled or exceeded in any given year (also called the "100-year flood").
"Base flood elevation (BFE)"means the elevation for which there is a 1% chance in any given year that flood levels will equal or exceed it. The BFE is generally based on statistical analysis of stream flow records for the watershed and rainfall and runoff characteristics in the general region of the watershed, and application of hydraulic backwater models.
"Basement"shall mean, for the purposes of this section, any area of a building having its floor subgrade (below ground level) on all sides.
"Bench"is a relatively level step excavated into earth material on which fill is to be placed.
"Borrow"is earth material acquired from an off-site location for use in grading on a site.
"Building"shall mean any structure built for the support, shelter, or enclosure of persons, animals, chattels, or property of any kind and having a roof supported by columns or walls and attached to the ground.
"Civil engineer"is a professional engineer registered in the State to practice in the field of civil works.
"Civil engineering"is the application of the knowledge of the forces of nature, principles of mechanics and the properties of materials to the evaluation, design and construction of civil works for the beneficial uses of mankind.
"Compaction"is the densification of a fill by mechanical means.
"Developed areas"means an area of community that is:
(1) A primarily urbanized, built-up area that is a minimum of 20 contiguous acres, has a basic urban infrastructure, including roads, utilities, communications and public facilities to sustain industrial and commercial activities; and
a. Within which 75% or more of the parcels, tracts or lots contain commercial, industrial or residential structures or uses; or
b. Is a single parcel, tract or lot in which 75% of the area contains existing commercial or industrial structures or uses; or
c. Is a subdivision developed at a density of at least two residential structures per acre within which 75% or more of the lots contain existing residential structures.
(2) Undeveloped parcels, tracts or lots, the combination of which is less than 20 acres and contiguous on at least three sides to areas meeting the criteria of paragraph (1).
(3) A subdivision that is a minimum of 20 contiguous acres that has obtained all necessary government approvals, provided that the actual "start of construction" of structures has occurred on at least:
a. Ten percent of the lots or remaining lots of a subdivision; or
b. Ten percent of the maximum building coverage or remaining building coverage allowed for a single lot subdivision and construction of structures is underway. Residential subdivisions must meet the density criteria of paragraph (1)c.
(4) Per the definition above, all of the land within the corporate limits of the City of Downey is a "developed area" for the following reasons:
a. The City of Downey is a fully urbanized, built-up contiguous area which has basic infrastructure, including roads, utilities, communications and public facilities to sustain industrial, residential and commercial activities; and
b. There are no undeveloped parcels, tracts or lots within the City that are 20 acres or greater in area. Nor are there undeveloped parcels, tracts or lots contiguous to each other that equal or exceed 20 acres in area.
"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, drilling operations or storage of equipment or materials.
"Earth material"is any rock, natural soil or fill and/or any combination thereof.
"Encroachment"means the advancement or infringement of uses, plant growth, fill, excavation, buildings, permanent structures or development into a floodplain which may impede or alter the flow capacity of a floodplain.
"Engineering geology"is the application of geologic knowledge and principles in the investigation and evaluation of the naturally occurring rock and soil for use in the design of civil works.
"Erosion"is the wearing away of the ground surface as a result of the movement of wind, water and/or ice.
"Fill"is a deposit of earth material placed by artificial means.
"Flood, flooding or floodwater"means a general and temporary condition of partial or complete inundation of normally dry land areas from (1) the overflow of flood waters, (2) the unusual and rapid accumulation of runoff of surface waters from any source, and (3) the condition resulting from flood-related erosion.
"Flood Boundary and Floodway Map"means the official map on which the Federal Emergency Management Agency or Federal Insurance Administration has delineated both the areas of flood hazard and the floodway.
"Flood Insurance Rate Map (FIRM)"means the official map on which the Federal Emergency Management Agency or Federal Insurance Administration has delineated both the areas of special flood hazards and the risk premium zones applicable to this community.
"Flood Insurance Study"means the official report provided by the Federal Insurance Administration that includes flood profiles, the FIRM, the Flood Boundary and Floodway Map, and the water surface elevation of the base flood.
"Flood zone exceptions"means a grant of relief from the requirements of this chapter which permits construction in a manner that would otherwise be prohibited by this chapter.
"Floodplain Administrator."The City Manager or his designee who shall act as the floodplain administrator. For purposes of implementing the requirements set forth in this chapter, certain duties and responsibilities have been assigned to the Building Official and City Engineer.
"Floodplain management"means the operation of an overall program of corrective and preventive measures for reducing flood damage, including, but not limited to, emergency preparedness plans, flood control works and floodplain management regulations.
"Floodplain management regulations"means zoning ordinances, subdivision regulations, building codes, health regulations, special purpose ordinances (such as floodplain ordinance, grading ordinance and erosion control ordinance) and other applications of police power. The term describes such Federal, state or local regulations in any combination thereof, which provide standards for the purpose of flood damage prevention and reduction.
"Floodproofing"means any combination of structural and non-structural additions, changes, or adjustments to structures which reduce or eliminate flood damage to real estate or improved real property, water and sanitary facilities, structures and their contents.
"Floodway"means the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than one foot. Also referred to as "regulatory floodway."
"Grade"is the vertical location of the ground surface.
(2) "Rough grade"is the stage at which the grade approximately conforms to the approved plan.
(3) "Finish grade"is the final grade of the site which conforms to the approved plan.
"Grading"is any excavating or filling or combination thereof.
"Highest adjacent grade"means the highest natural elevation of the ground surface prior to construction next to the proposed walls of a structure.
"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 the Interior, or;
(4) Individually listed on a local inventory of historic preservation in communities with historic preservation programs that have been certified by the State.
"Key"is a designed compacted fill placed in a trench excavated in earth material beneath the toe of a proposed fill slope.
"Lowest floor"means the lowest floor of the lowest enclosed area (including basement). An unfinished or flood resistant enclosure below the lowest floor, usable solely for parking of vehicles, building access or storage in an area other than a basement area is not considered a building's lowest floor; provided that such enclosure is not built so as to render the structure in violation of the applicable non-elevation design requirements of this chapter.
"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"means a parcel (or contiguous parcels) of land divided into two or more manufactured home lots for sale or rent.
"Market value"means the reasonable replacement value of the existing structure based on its latest equalized assessed improvement valuation. The property owner may submit a market analysis or market survey prepared by a State licensed real estate professional in cases where the assessed improvement valuation is exceptionally low.
"Mean sea level"means, for purposes of the National Food Insurance Program, the National Geodetic Vertical Datum (NGVD) of 1929 or other datum, to which flood elevations shown on a community's Flood Insurance Rate Map are referenced.
"New construction"means, for floodplain management purposes, new freestanding structures for which the "start of construction" commenced on or after the effective date of a floodplain management regulation adopted by the City of Downey.
"One hundred year flood" or "100-year flood"means a flood which has a 1% annual probability of being equaled or exceeded in any given year. It is identical to the "base flood", which will be the term used throughout this chapter.
"Person"shall mean and include any person, firm, association, organization, partnership, business trust, company, or corporation and any municipal, political, or governmental corporation, district, body, or agency other than the City of Downey.
"Recreational vehicle"shall mean a camp car, truck pickup camper, truck-mounted camper, converted bus or van, motorhome, travel trailer, or tent trailer designed for human habitation for recreational or emergency occupancy, with a living area of less than 320 square feet, excluding built-in equipment, such as wardrobes, closets, cabinets, kitchen units, baths, toilet rooms, and driver's areas, which vehicle may be moved upon the public highway without a special permit or chauffeur's license. For the purposes of this section "recreational vehicle" shall not include boats, boat trailers, dune buggies, and off-road vehicles.
"Remedy a violation"means to bring a structure or other development into compliance with the City of Downey Floodplain Management Regulations, or, if this is not possible, to reduce the impacts of its noncompliance. Ways that impacts may be reduced include protecting the structure or other affected development from flood damages, implementing the enforcement provisions of this chapter or otherwise deterring similar violations in the future, or reducing State or Federal financial exposure with regard to the structure or other development.
"Regulatory floodway"means the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without cumulatively increasing the water surface elevation more than one foot.
"Site"is any lot or parcel of land or contiguous combination thereof, under the same ownership, where grading is performed or permitted.
"Slope"is an inclined ground surface the inclination of which is expressed as a ratio of horizontal distance to vertical distance.
"Soil"is naturally occurring superficial deposits overlying bed rock.
"Soils engineer (geotechnical engineer)"is an engineer experienced and knowledgeable in the practice of soils engineering (geotechnical) engineering and registered in the State of California to practice in the field of soils engineering.
"Soils engineering (geotechnical engineering)"is the application of the principles of soils mechanics in the investigation, evaluation and design of civil works involving the use of earth materials and the inspection and/or testing of the construction thereof.
"Special flood hazard area (SFHA)"means an area in the floodplain subject to a 1% or greater chance of flooding in any given year, and shown on a FIRM as Zone A, or AR. For purposes of this chapter, Zone A as identified on the FIRM are areas within the flood control channels under the jurisdiction of the County of Los Angeles.
"Start of construction",for purposes of this chapter, means the date the building permit was issued, provided that the actual start of construction was within 180 days from the date of the permit. The actual start means either 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 or 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.
"Structure"shall mean anything constructed or erected which requires a location on the ground or which is attached to something having a location on the ground, but not including fences or walls seven feet or less in height. Structure shall also mean a walled and roofed building that is principally above ground; this includes a gas or liquid 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 50% of the reasonable replacement value of the structure at the time of its damage based on its assessed valuation.
"Terrace"is a relatively level step constructed in the face of a graded slope surface for drainage and maintenance purposes.
"Variance"means a grant of relief from the requirements of this chapter which permits construction in a manner that would otherwise be prohibited by this chapter.
"Violation"means the failure of a structure or other development to be fully compliant with this chapter. A structure or other development without the elevation certificate, other certifications or other evidence of compliance required in this chapter is presumed to be in violation until such time as the documentation is provided to the Building Official.
"Watercourse"means a natural or artificial channel in which a flow of water occurs either continually or intermittently.
(Added by Ord. 932, adopted 8-13-91; amended by Ord. 1010, adopted 12-12-95; Ord. 1053, adopted 7-14-98)