Sec. 676-102. - Definitions.
As used in this article, the following terms shall have the meanings ascribed to them in this section:
Base billing unit (BBU) shall mean an area of measured impervious area (IA) surface following the convention 1—1,000 square feet of measured IA is assigned one (1) BBU; 1,001—2,000 square feet of measured IA is assigned two (2) BBUs; 2,001—3,000 square feet of measured IA is assigned three (3) BBUs and progressing in a manner such that each additional 1,000 square foot unit of IA is assigned an additional BBU.
Best management practice (BMP) shall mean a facility designed and constructed to control the quality and/or quantity control of stormwater runoff.
Board shall mean the board of public works established under chapter 261 of the Code.
Credit shall mean a reduction in a stormwater user fee based on certain qualifying conditions or activities that benefit the stormwater system, increase green infrastructure and/or aid the department in the outreach and education compliance and reporting requirements of the city's National Pollutant Discharge Elimination System discharge permit.
Department shall mean the department of public works established under chapter 261 of the Code.
Director shall mean the director of the department of public works.
District shall mean the Marion County Stormwater Management District authorized by IC 8-1.5-5 and created by this article.
Equivalent residential unit (ERU) shall mean a unit value, equal to the average amount of impervious area of a single-family residential property within Marion County. One (1) ERU is hereby established as two thousand eight hundred (2,800) square feet of impervious area.
Green infrastructure practices (GI) shall mean approved structural best management practices that implement infiltration as the primary method of management and treatment of stormwater and stormwater runoff and have restricted or no positive discharge to the stormwater system.
Impervious area (IA) shall mean an area that has been paved and/or covered with buildings and materials that include, but are not limited to, concrete, asphalt, rooftop and blacktop, such that the infiltration of stormwater into the soil is prevented or impeded. Impervious area shall include gravel driveways, private roadways, parking lots and similar areas designed or used for vehicular traffic. Excluded from this definition are undisturbed land, lawns and fields and undisturbed and tilled agricultural lands and areas.
Infiltration shall mean the process of allowing runoff to penetrate the ground surface and flow through the upper soil surface.
Nonresidential property shall mean all properties not included within the definition of residential property in this article. Nonresidential property shall include, but not be limited to, the following:
(1) Agricultural property;
(2) Apartment and condominium common property;
(3) Mobile home parks;
(4) Commercial property;
(5) Industrial property;
(6) Churches;
(7) Schools;
(8) Federal, state and local government property; and
(9) Platted subdivisions established in accordance with chapter 741 of the Code.
Public streets, roads and highways shall mean those streets, roads and highways that are accepted for maintenance by the State of Indiana, the City of Indianapolis or any other municipality and that are available for use in common by the general public for motor vehicle transportation.
Residential property shall mean an improved lot or parcel of real estate on which a building or mobile home is situated, which building or mobile home contains a group of rooms forming a single dwelling unit with facilities that are used or are intended to be used primarily for living, sleeping, cooking and eating. This definition also includes an individual lot or parcel containing one (1) individual building containing three (3) or fewer separate or attached single-family dwelling units.
Square footage of impervious area, for purposes of assigning an appropriate number of ERUs or BBUs, as applicable shall be calculated using the outside boundary dimensions of the impervious area and shall include all of the total enclosed square footage, without regard to topographic features of the enclosed surface.
Stormwater credit manual means the manual recommended by the department and approved by the board that shall set forth the details of the credit system, including parameters of credit and application procedures.
Stormwater user fee shall mean the service charge or user fee authorized by IC 8-1.5-5 and imposed on the users of the Marion County Stormwater Management District's stormwater system pursuant to section 131-422 of this Code.
Stormwater specification manual means the regulations adopted by the board pursuant to chapter 561 of the Code and complied by the department as a "Stormwater Design and Construction Specification Manual" as amended from time to time.
Stormwater system shall mean all facilities, including structures and natural water courses under the ownership and/or subject to the control of the department used for collecting and conducting stormwater to, through and from drainage areas to the point of final outlet, including, but not limited to the following: inlets, conduits and appurtenant features, pipes, pumping stations, manholes, structures, channels, outlets, creeks, catch basins, ditches, streams, culverts, retention or detention basins, BMPs and other structural components and equipment designed to transport, move, treat, manage or regulate the flow of stormwater. Stormwater system shall include public streets, roads and highways.
(G.O. 43, 2001, § 4; G.O. 43, 2014, § 2; G.O. 16, 2022, § 51)
