§ 19-176. Definitions.

As used in this article:

Adjusted impervious area shall mean the stormwater basin area(s) multiplied by the stormwater management facility impervious area factor plus the impervious area(s) plus one-half (½) of the partial impervious area(s).

City shall mean the City of Lauderhill, Florida, and its staff and elected officials.

Credit factor shall mean the numeric value generated by dividing the total drainage area (A _d ) by the total area (A _t ) of the property; where (A _d ) is the area covered by the onsite control system as proposed on the civil-site and drainage plans and/or as calculated by the registered design engineer.

Department shall mean the Department of Environmental and Engineering Services.

Developed property shall mean any parcel of land that has been modified by the action of persons to reduce the land's natural ability to absorb and hold rainfall. These modifications include, but are not limited to, clearing, grading, cementing, filling, or compacting the natural ground, or effecting or constructing buildings, parking lots, driveways, patios, decks, walkways, and athletic courts.

Drainage area shall mean the watershed (acreage) contributing surface water runoff to the city's storm drainage system.

Equivalent residential unit (ERU) shall mean the basis unit for the computation of stormwater service charges and is defined as three thousand eight hundred (3,800) square feet of impervious area, which represents the estimated average impervious area for all developed, detached single-family properties in the city.

Impervious area shall mean any part of any parcel of land that has an impermeable cover caused to be erected or constructed by the action of persons, and such covers include, but are not limited to, buildings, parking lots, driveways, patios, decks, walkways, and athletic courts.

Manager shall mean the city manager or designee.

Multifamily residential properties shall mean and include all duplex, condo, trailer, apartment and other properties containing more than one (1) dwelling unit. Common areas associated with such properties shall be included in the charge to the multifamily units on such properties.

Nonresidential/commercial properties shall mean and include all property zoned or used for commercial, industrial, retail, governmental, or other nonresidential purposes and shall include all developed real property in the city not classified as single-family or multifamily as defined in this section.

Partial impervious area shall mean any part of any parcel of land that has been modified by the action of persons to reduce the land's natural ability to absorb and hold rainfall. This includes areas which have been cleared, graded, graveled, filled, or compacted, and typically involve unpaved parking, unpaved vehicle and equipment storage, and material storage. Excluded are all lawns, landscape areas, and gardens or farming areas.

Receiving water shall mean those canals, lakes and other bodies of water into which surface waters are directed, either naturally or in manmade ditches, pipes, or open systems.

Single-family property shall mean and include all single-family detached housing units.

Standard retention volume shall mean the quantity of stormwater runoff generated by multiplying 7.9 inches by the adjusted impervious area.

Stormwater basis area shall mean the horizontal area occupied by stormwater detention, retention, and/or detention/retention basins at the design maximum water surface elevation.

Stormwater detention basin shall mean a facility, either natural or manmade, that collects and contains stormwater runoff and allows the release of the stormwater through a structure that is designed to control the rate of the release of the stormwater, as acknowledged by the city manager or designee.

Stormwater detention/retention basin shall mean a facility, either natural or manmade, that performs a combination of both a stormwater detention basin and a retention basin, as acknowledge by the city manager or designee.

Stormwater management facility impervious area factor shall mean the amount that the stormwater retention basin area(s) is adjusted; the factor is derived by dividing 4.2 inches (which is the amount of rainfall generated by the 25-year, 24-hour rain storm event between the 11 ^th and 13 ^th hours) by 7.9 inches (which is the amount of rainfall generated by the 25-year, 24-hour rain storm event) which quotient is 0.53.

Stormwater management system shall mean and include all natural and manmade elements used to convey stormwater from the first point of impact with the surface of the earth to a suitable receiving water body or location internal or external to the boundaries of the city. The stormwater management system includes all pipes, channels, streams, ditches, wetlands, sinkholes, detention/retention basins, ponds, and other stormwater conveyance and treatment facilities.

Stormwater retention basin shall mean a facility ether natural or manmade, that collects and contains stormwater runoff and only allows the release of the stormwater runoff by one (1) or more of the following: evaporation, percolation into the natural ground and/or percolation into a manmade filtration system that may convey the stormwater runoff to a stormwater management system, as acknowledged by the city manager or designee.

Stormwater retention volume shall mean the maximum capacity of a stormwater retention basin(s).

(Ord. No. 04O-02-112, § 1, 2-23-04; Ord. No. 06O-10-179, § 1, 11-13-06; Ord. No. 11O-06-127, § 1, 6-27-2011)