Definitions — "M"
Seattle Mun. Code § 23.60A.926
in effect"Manufacturing" means the following uses as defined in Chapter 23.84A , Definitions, as of the effective date of this ordinance: — Light manufacturing; — General manufacturing; — Heavy manufacturing. "Marina" means both marina, commercial and marina, recreational. "Marina, commercial" means a use in which a system of piers, buoys, or floats is used to provide moorage for: 1. Sale, or rent usually on a monthly or yearly basis, for commercial vessels, where commercial vessels occupy 75 percent or more of the moorage; 2. Commercial vessels moored for the operation of commercial businesses; or 3. Commercial or recreational vessels undergoing repair by commercial businesses. Minor vessel repair, haul-out, dry boat storage, tugboat dispatch offices, and other services are also often accessory to or associated with the use. "Marina, recreational" means a use, in which a system of piers, buoys, or floats is used to provide moorage for sale or rent, usually on a monthly or yearly basis. Recreational vessels occupy 75 percent or more of the moorage. Minor vessel repair, haul-out, dry boat storage and other services are also often accessory to or associated with the use. "Marine service station" means a marine sales and service use in which fuel for boats is sold to boats in the water and in which accessory uses, including but not limited to towing or minor vessel repair, may also be provided. "Master Program." See "Shoreline Master Program." "May" means the action is acceptable, provided it conforms to the provisions of this Chapter 23.60A . "Mean higher high water (MHHW)" means a tidal datum. The average of the higher of the high water heights, each tidal day, observed over the National Tidal Datum Epoch. For stations with shorter series, simultaneous observational comparisons are made with a control tide station in order to derive the equivalent or accepted values of the National Tidal Datum Epoch. The elevation of this datum on the shore is the MHHW line. "Mean lower low water (MLLW)" means a tidal datum. The average of the lower of the low water heights, each tidal day, observed over the National Tidal Datum Epoch. For stations with shorter series, simultaneous observational comparisons are made with a control tide station in order to derive the equivalent or accepted values of the National Tidal Datum Epoch. The elevation of this datum on the shore is the MLLW line. "Mechanical harvesting and cutting" means the partial removal or control of aquatic plants with the use of mechanical harvesters that cut and collect aquatic plants, and mechanical cutters that only cut aquatic plants. "MHHW." See "Mean higher high water." "Mitigation" means the action taken to minimize, rectify, reduce or eliminate adverse impacts over time and/or compensate for the loss of ecological functions resulting from new development or use, or from maintaining, repairing or altering existing development or use that creates new adverse impacts to ecological functions, or from substantially improving, replacing or rebuilding a nonconforming development. Loss of ecological functions may be due to, but not limited to, location, design, construction and management of the development or use. Mitigation sequencing means the steps taken to avoid, minimize, rectify, reduce or eliminate adverse impacts over time and/or compensate for the loss to ecological functions, as specified in subsection 23.60A.158.B.1, so that mitigation achieves no-net-loss to ecological functions. "MLLW." See "Mean lower low water." "Moorage, covered" means a pier and pier structures or system of floating or fixed access-ways covered with a roof, to which boats on water may be secured. "Moorage, open wet" means an uncovered pier and pier structures or system of floating or fixed access-ways to which boats on water may be secured. "Moorage, transient" means moorage available to the public, generally for a fee, on a short-term basis. Transient moorage may be available on an hourly, daily or weekly basis. "Mudflat" means a coastal wetland consisting of fine-grained silt or organic matter that is covered at high tide and exposed at low tide. (Ord. 124750 , § 69, 2015; Ord. 124105 , § 3, 2013.)
Source: Seattle Municipal Code (Municode library)URL: https://library.municode.com/wa/seattle/codes/municipal_codeFetched: 7/25/2026