§ 92-5. Definitions.
The following words, terms and phrases, when used in this chapter, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:
Applicant means any person proposing or implementing the development of land.
BMP or best management practice means a practice, or combination of practices and design criteria that comply with the Michigan Department of Environmental Quality's Guidebook of BMPs for Michigan Watersheds, and Michigan LID Manual, or equivalent practices and design criteria that accomplish the purposes of this ordinance (including, but not limited to, minimizing stormwater runoff and preventing the discharge of pollutants into stormwater) as determined by the city engineer, city's assigned review consultant and/or, where appropriate, the standards of the Bay County Drain Commissioner.
City means the City of Bay City.
Conveyance facility means a storm drain, pipe, swale, channel, creek, river or tributary overland areas.
Design engineer means the professional engineer registered in the State of Michigan responsible for the design of the stormwater management plan.
Detention means a system which is designed to capture stormwater and release it over a given period of time through an outlet structure at a controlled rate.
Developed or development means any installation or construction of impervious surfaces on a development site that require, pursuant to state law or local ordinance, city's approval of a site plan, site condominium, special land use, planned unit development, rezoning of land, land division approval, private road approval, or other approvals required for the development or redevelopment of land or the erection of buildings or structures; provided, however, that for the purposes of this section only, developed or development shall not include the actual construction of, or an addition, extension, or modification to, an individual single-family or a two-family detached dwelling.
Engineered site grading plan means a sealed drawing or plan and accompanying text prepared by a registered engineer or landscape architect which shows alterations of topography, alterations of watercourses, flow directions of stormwater runoff, and proposed stormwater management and measures, having as its purpose to ensure that the objectives of this ordinance are met.
Grading means any stripping, excavating, filling, and stockpiling of soil or any combination thereof and the land in its excavated or filled condition.
Impervious surface means a surface that does not allow stormwater runoff to slowly percolate into the ground.
Infiltration means the percolation of water into the ground, typically expressed in inches per hour.
LID means low impact development.
Maintenance agreement means a binding agreement that sets forth the terms, measures, and conditions for the maintenance of stormwater systems and facilities.
Offsite facility means all or part of a drainage system that is located partially or completely off the development site which it serves.
Peak rate of discharge means the maximum rate of stormwater flow at a particular location following a storm event, as measured at a given point and time in cubic feet per second (CFS).
Plan means written narratives, specifications, drawings, sketches, written standards, operating procedures, or any combination of these which contain information pursuant to this ordinance.
Retention means a holding system for stormwater, either natural or man-made, which does not have an outlet to adjoining watercourses or wetlands. Water is removed through infiltration and/or evaporation processes.
Runoff means that part of precipitation, which flows over the land.
Sediment means mineral or organic particulate matter that has been removed from its site of origin by the processes of soil erosion, is in suspension in water, or is being transported.
Storm drain means a conduit, pipe, swale, natural channel, or manmade structure which serves to transport stormwater runoff. Storm drains may be either enclosed or open.
Stormwater BMP means any facility, structure, channel, area, process, or measure which serves to control stormwater runoff in accordance with the purposes and standards of this ordinance.
Stormwater plan means drawings and written information prepared by a registered engineer, or registered landscape architect, which describe the way in which accelerated soil erosion and/or stormwater flows are proposed to be controlled, both during and after construction, having as its purpose to ensure that the objectives of this ordinance are met.
Swale means defined contour of land with gradual slopes that transports and directs the flow of stormwater.
Watercourse means any natural or manmade waterway or other body of water having reasonably well-defined banks. Rivers, streams, creeks and brooks, and channels, whether continually or intermittently flowing, as well as lakes and ponds are watercourses for purposes of stormwater management.
Watershed means an area in which there is a common outlet into which stormwater ultimately flows, otherwise known as a drainage area.
Wetlands means land characterized by the presence of water at a frequency and duration sufficient to support, and that under normal circumstances does support wetland vegetation or aquatic life and is commonly referred to as a bog, swamp, or marsh, as defined by state law.
(Ord. No. 2017-17 , 11-6-17)