“Best management practices (BMPs)” means the physical, structural, and/or managerial practices that, when used singly or in combination, prevent or reduce the release of pollutants and other adverse impacts to waters of Washington State.

“City” means city of Lacey, Washington.

“Flow control BMP or facility” means a drainage facility designed to mitigate the impacts of increased surface and stormwater runoff flow rates generated by development. Flow control facilities are designed either to hold water for a considerable length of time and then release it by evaporation, plant transpiration, and/or infiltration into the ground, or to hold runoff for a short period of time, releasing it to the conveyance system at a controlled rate.

“Groundwater” means water in a saturated zone or stratum beneath the surface of the land or below a surface water body.

“Low impact development (LID)” means a stormwater and/or land use management strategy that strives to mimic pre-disturbance hydrologic processes of infiltration, filtration, storage, evaporation and transpiration by emphasizing conservation, use of on-site natural features, site planning, and distributed stormwater management practices that are integrated into a project design.

“MS4” means a municipal separate stormwater sewer system. A system of conveyances (including streets, curbs, gutters, catch basins, pipes and ditches) owned or operated by a city or other public entity, that is used for collecting or conveying stormwater (excluding combined sewers).

“Native vegetation” means vegetation including trees, comprised of plant species that are either indigenous or naturalized to the Puget Sound region. Native vegetation does not include noxious weeds.

“Person” means any individual, partnership, corporation, association, organization, cooperative, public or municipal corporation, agency of the state, or local governmental unit, however designated.

“Started construction” means, at a minimum, issuance of a grading permit and the site work associated with and directly related to the approved project has begun.

“Stormwater” means surface runoff due to precipitation or snowmelt; that portion of precipitation that does not naturally percolate into the ground or evaporate, but flows via overland flow, interflow, channels, or pipes into a defined surface water channel or a constructed infiltration facility.

“Stormwater Design Manual” means the City of Lacey Stormwater Design Manual as currently adopted.

“Stormwater facility” means constructed component of a stormwater system, designed or constructed to perform a particular function or multiple functions. Stormwater facilities include, but are not limited to, pipes, swales, ditches, culverts, street gutters, detention basins, retention basins, constructed wetlands, infiltration devices, catch basins, oil/water separators, and sediment basins. Stormwater facilities are described in the Stormwater Design Manual. “Stormwater facility” includes both public and privately owned facilities.

“Stormwater system” means constructed and natural features which function together as a system to collect, convey, channel, hold, inhibit, retain, detain, infiltrate, divert, treat, or filter stormwater. “Stormwater system” includes both public and privately owned features.

“Waters of the state” means those waters defined as “waters of the United States” in 40 CFR Subpart 122.2 within the geographic boundaries of Washington State and “waters of the state” as defined in Chapter 90.48 RCW which includes lakes, rivers, ponds, streams, inland waters, underground waters, salt waters, and all other surface waters and water courses within the jurisdiction of the state of Washington. (Ord. 1525 §1 (part), 2017).