“Tandem parking” means parking spaces that have a single means of ingress and egress.

“Target,” in reference to Chapter 18.812 IMC, Tree Preservation, means people, property, or activities that could be injured, damaged, or disrupted by a tree.

Tavern. See “Bar/tavern.”

“Temporary structure” means a structure without any foundation or footings that is removed when the designated time period, activity, or use for which the temporary structure was erected has ceased.

“Temporary use” means an activity that is intended for a limited duration.

“Through block connection” or “through block passage” means a publicly accessible passage that runs the entire length of the subject block, and perpendicular to the subject frontage, or diagonal across the block, and connecting to any existing streets or alleys. A through block connection or through block passage improves walkability and pedestrian access and are separate from vehicular facilities.

“Toe of slope” means a distinct topographic break in a slope which separates slopes inclined at less than 40 percent from slopes equal to or in excess of 40 percent. Where no distinct break exists, the toe of a steep slope is the lowermost limit of the area where the ground surface drops 10 feet or more vertically within a horizontal distance of 25 feet.

“Topping” as it relates to trees means the significant cutting back of the leader stem or major branches, resulting in severely altering the growth potential of a tree as defined by the City Arborist. This definition does not apply when the sole purpose is to create a snag or snags for wildlife habitat.

“Tot lot” means a site which is designed for play activities of young children, protected from traffic and typically including a hard structure, such as a swing set or slide.

“Tower” means a structure built for the sole or primary purpose of supporting any FCC-licensed or authorized antennas and their associated facilities, including structures that are constructed for wireless communications services, including, but not limited to, private, broadcast, and public safety services, as well as unlicensed wireless services such as microwave backhaul, and the associated site.

“Townhouse” means two or more single household dwellings that are attached to one another by a common vertical wall(s) (of fire code required composition), each unit has its own front and rear access to the outside at the ground level, and no unit is located over another unit. May be single- or multistory subject to applicable height standards. The permitted number of attached dwellings in a single grouping varies by zoning district.

“TP-NRCA” means the Tradition Plateau Natural Resource Conservation Area established in IMC 18.400.100.

“Tract” means an area, parcel, piece of land, or property which is designated for a specific use.

“Traffic study” means a study that estimates trip generation, identifies traffic demand patterns, evaluates safety, access or other transportation issues and identifies mitigation measures needed to meet engineering standards such as operational and safety standards.

“Trailhead” means a public parking and/or gathering terminus that gives public access to a designated park and/or recreation area. Area access is usually by means of a trail, service road, or abandoned railroad grade. Trailheads are differentiated by class depending on size and facilities required.

“Transferable development right” or “TDR” means a right to develop or build that is severed from other property rights and can be redeemed in designated parts of Issaquah.

“Transit facilities” means all real and personal property necessary or useful in rendering transit service by means of bus or other mode, including rights-of-way, transit stops, areas for parking and all equipment, fixtures, buildings and structures, and services incidental to or required in connection with the performance of transit service.

“Transit services” means the transportation of persons and their packages and baggage by means of transit facilities.

“Transit stop” means an area where passengers wait for, board, alight, and transfer between transit vehicles.

“Transmission equipment” means equipment that facilitates transmission for any FCC-licensed or authorized wireless communication service, including, but not limited to, radio transceivers, antennas, coaxial or fiber-optic cable, and regular and backup power supply. The term includes equipment associated with wireless communications services including, but not limited to, private, broadcast, and public safety services, as well as unlicensed wireless services and fixed wireless services such as microwave backhaul.

“Transmission line” means a line carrying power from the point of generation and delivers it to distribution substations. Transmission lines operate at a nominal voltage of 55 kilovolts or more, usually 115 or 230 kilovolts.

“Transom” means the cross-bar above door that separates the fan light above it.

“Transom window” means a window located above an exterior doorway or storefront.

“Transportation demand management (TDM)” means strategies that decrease single occupancy motor vehicle trips including, but not limited to, transit and ridesharing incentives, flexible working hours, parking management and pedestrian and bicycle facility enhancements.

“Transportation facility” means a public or private facility for the motorized and nonmotorized transportation of people and goods from place to place which is constructed, operated, or maintained. The term includes the real property that has been or may be established for the transportation of people or goods, including, but not limited to, roads, alleys, rights-of-way, street services, traffic control devices, curbs, gutters, sidewalks, and related facilities and improvements.

“Transportation improvement program” or “TIP” is the City’s transportation improvement program adopted pursuant to RCW 36.70A.070(6).

“Transportation management plan” or “TMP” is a contract between the City and an employer or group of employers stating that the employer(s) will provide education, opportunities, and employee incentives and ride sharing, parking incentives and other transportation alternatives. The TMP also addresses the responsibility of the employer for monitoring the success of the TMP, and reporting the annual results to the City.

“Tree” means any living woody plant species other than a shrub, characterized by one main trunk or few dominant trunks and many branches, known to achieve a typical mature height of at least 15 feet.

“Tree canopy” means the layer of tree leaves, branches and stems that cover the ground when viewed from above.

“Tree canopy coverage” means the area covered by the canopy of trees on a lot, tract, or parcel. When a tree trunk straddles a property line, 50 percent of the canopy must be counted towards each property’s canopy coverage.

“Tree farm” means an agriculture use which involves growing trees as crops.

“Tree pit” means an excavated hole dug so that the dimensions are three times the diameter of the rootball of the tree to be planted and backfilled with appropriate soil amendment per the guidelines set forth in this Code and adopted guidelines available at the permit center.

“Tree plan” means an evaluation or site plan describing the tree and vegetation resources existing on the site, with information provided such as tree species, size, location, condition, plant community, health, and population estimate.

“Tree Risk Assessment Qualified” or “TRAQ” means a certification by the International Society of Arboriculture for arborists with specialist training, knowledge, and experience in tree risk assessment. TRAQ arborists follow a standardized systematic process for assessing tree risk and understand the principles of basic visual assessment and advanced diagnostic techniques.

“Tree stand” means a group of three or more trees of any size or species whose driplines touch. A “significant tree stand” is a tree stand that contains three or more significant trees.

“Tree well” means a tree pit in a paved sidewalk area with grating or other measure to prevent pedestrian traffic from damaging the root area.

“Trellis” means a landscape feature consisting of an open frame with horizontal and/or vertical lattice work. It must be at least 50 percent open on all sides and the roof.

“Trim” means an exterior material applied to accentuate design elements on the façade, especially windows and doors.

“Trip bank” means the document created and maintained by the City to record the available vehicle internal trip ends, reservation of trips, and the balance of available vehicle internal trip ends following subtraction of vehicle internal trip ends from each concurrency approval.

“Trip end” means a single or one-directional vehicle movement with a beginning (origin) and an end (destination).

“Tripartite” means composed of three parts with a clear expression of a building’s base, middle, and top. This may be achieved through material or color changes, horizontal façade articulation or stepbacks, or other façade elements. The size of each part will vary based on building size and design.

“Triplex” means a multifamily building, which is located on one legal lot, containing three dwelling units designed exclusively for occupancy by three single households living independently of each other.

“Trips” means the number of vehicle internal trip ends generated by a land use in the p.m. peak hour as determined by the latest edition of the Institute of Transportation Engineers Trip Generation Manual, or other authorized source approved by the Director.

“Trips, net new” means the number of vehicle internal trip ends generated by a new development, change in use, expansion or modification requiring a development permit minus the trips generated by the immediately preceding use of the site. No credit shall be given for vehicle internal trip ends from sites/structures that have been vacant for more than one year or for trips from any unpermitted or illegal development.

“Turf-block/grass-crete” means an alternative material used for parking areas which includes a mixture of pervious and impervious elements. One of the elements is typically a type of grass or groundcover. For the purpose of this Code, turf-block is considered to be impervious.

“Type 1 connection” means a multipurpose path on one side of the street accommodates pedestrians and bikes, sidewalk on the other side of the street experience is a sidewalk or multipurpose path.

“Type 2 connection” means a street that provides a “linear urban park” experience with wide sidewalks, a wide buffer from the street, pockets for pedestrians to comfortably pause. Bike lanes provided, potentially separated from cars, potentially completely integrated into the “linear urban park” experience.

“Type 3 connection” means a street with a pedestrian- and bike-centric experience. (Ord. 3011 § 2 (Exh. B), 2023).