§ 11-2. Definitions.

For the purposes of this article, the following terms, phrases, words, and their derivations shall have the meanings given herein.

Best management practices or BMPs: Practices, procedures or a schedule of activities to reduce the amount of sediment and other pollutants in stormwater discharges associated with construction and land disturbance activities.

Clearing: Any activity that removes the vegetative surface cover. This includes clear cutting and timber removal even if the stump portion of the vegetation is not removed from the ground.

Construction or land disturbance site or site: A parcel of land or a contiguous combination thereof, where grading work is performed.

Drainageway: Any channel that conveys surface runoff through a site.

Erosion: The wearing away of land surface through the action of wind, water, gravity, or any combination of those forces.

Erosion control: Any BMP that prevents or minimizes erosion.

Grading: Reshaping the ground surface through relocation, removal and/or placement of manmade or natural materials, including the resulting conditions.

Land disturbance activities: Any activity or use of land such as but not limited to clearing, grading, occupancy, transportation or any other action which results in removal or destruction of the natural site vegetation and destruction of or damage to the root zone or otherwise results in leaving the ground surface exposed to soil erosion through the action of wind, water or gravity.

Perimeter control: A barrier that prevents sediment from leaving a site by filtering sediment-laden runoff or diverting it to a sediment trap or basin.

Phasing: Clearing a parcel of land in distinct phases, with the each phase substantially completed before the commencement of the next.

Runoff coefficient: The fraction of total rainfall that will appear at the outfalls from a site.

Sediment control: Any BMP that prevents eroded sediment from leaving a site.

Site disturbance permit: A permit issued by the city authorizing disturbance of the land at a specific site subject to conditions stated in the permit.

Stabilization: The use of BMPs that prevent exposed soil from eroding. This may include site improvements, grading and structures for the control of erosion and runoff.

Start of construction: The first land-disturbing activity associated with a development, including mobilization, site access, land preparation such as clearing, grading, and filling; installation of streets and walkways; excavation for basements, footings, piers, or foundations; erection of temporary forms; and installation of accessory buildings such as garages.

Stormwater pollution prevention plan (SWPPP): A management plan, the purpose of which is to ensure the design, implementation, management and maintenance of BMPs in order to reduce the amount of sediment and other pollutants in stormwater discharges associated with land disturbance activities, comply with the standards of the city and ensure compliance with the terms and conditions of the applicable state permits, including adherence to the land disturbance program contained in Missouri state issued MS4 NPDES permit.

Water course: A natural or artificial channel or body of water, including, but not limited to, lakes, ponds, rivers, streams, ditches and other open conveyances that carry surface runoff water either continuously or intermittently.

(Ord. No. 04-07, § 2, Exh. 1, 1-26-04; Ord. No. 11-37, § 1, 9-12-11)