Northgate station (Sound Transit)

The Northgate Transit Center opened on June 6, 1992, at a cost of $15.8 million to construct.[5] It was planned in 1978,[6] as part of King County Metro's "MetroTRANSITion" program, becoming the last of eleven transit centers built under the plan.[7][8] The Northgate area was historically served by the Blue Streak express bus to downtown Seattle from 1970 onward,[9] using a park and ride on the north side of the mall (closed in 2008 and converted into Hubbard Homestead Park).[10] Construction began in 1990 with the demolition of a Group Health clinic and relocation of a segment of Thornton Creek.[11]

The transit center was sited adjacent to the mall and an access ramp to the Interstate 5 reversible express lanes.[12] It consisted of six bus bays that served a reverse-direction street for buses with extra space for layovers and passing lanes.[13] The passenger waiting area was covered by large white canvases held aloft by steel towers, designed by ZGF Architects.[5] It featured several passenger amenities, including public restrooms, pay phones, an ORCA card vending machine, bicycle parking, and a baby changing station.[5] Several sculptures at the transit center were designed by Cris Bruch and cost $50,000 to install as part of the agency's public art program.[14]

The park and ride at the transit center initially consisted of 284 spaces in the west lot before it underwent two expansions. In 2001, the parking lot was expanded to 950 spaces after the $7.6 million purchase of 3.9 acres (1.6 ha) from Simon Property Group.[15] The completion of the Thornton Creek development in April 2009 brought 350 additional parking spaces to be added to the transit center,[16] mostly used to replace a 500-stall park and ride north of the mall.[10] By 2016, Northgate Transit Center had over 1,000 total parking spaces that normally filled before 9 a.m. on weekdays.[17]

Light rail construction as seen in November 2019

The Northgate area had been considered in several rapid transit studies in the late 20th century as a suitable terminus or major station.[18] The Northgate Link project was proposed as part of the "Sound Move" ballot measure in 1996, pending additional funding,[19] but was deferred until the voter approval of the Sound Transit 2 package in 2008.[20][21]

Construction of the Northgate extension began in 2012.[20] Absher Construction was awarded a $174 million contract in August 2016 to build Northgate station and the elevated guideway leading to the tunnel portal.[22] On January 13, 2017, Sound Transit broke ground on the station, beginning construction with the demolition of two parking lots.[23] By July, installation of the station's support columns and platform-level girders were underway.[24][25] Construction on the station was declared substantially complete in February 2021, shortly after powered testing of light rail vehicles had begun.[26][27]

As part of the project, parking capacity at the transit center was reduced by spaces eliminated for the station and a new bus station to the west of the original one.[28] A partially below-grade parking garage with 450 spaces was opened in November 2018 on the southwest corner of the Northgate Mall parking lot.[29] A larger garage with up to 900 vehicles was proposed but rejected after outcry from community and neighborhood groups.[30][31]

Northgate station and its adjoining pedestrian bridge to North Seattle College were opened on October 2, 2021, a day after the formal ribbon-cutting.[32] Bus service was transferred to the new bus bays under the light rail station on the same day, including new routes serving Snohomish County on Sound Transit Express and Community Transit that debuted on October 4.[33] The public restrooms at the station's mezzanine level were closed in mid-2022 due to vandalism and security incidents; they were replaced by portable toilets for a year while undergoing renovations.[34]

Beyond the station, a 400-foot (120 m) pocket track was built to the north for train storage and reversal, as well as accommodating a future light rail extension to Lynnwood Transit Center, planned to be completed in 2024.[35] Sound Transit estimates that the station will have 15,000 daily boardings by 2030.[35]

The John Lewis Memorial Bridge, as seen from Northgate station's platform

The John Lewis Memorial Bridge is an overpass for pedestrians and bicycles crossing Interstate 5, connecting the mezzanine of Northgate station to the North Seattle College campus and Licton Springs neighborhood.[2] It opened alongside the light rail station on October 2, 2021, and was dedicated by city leaders.[32] The bridge is 1,900 feet (580 m) long, with a 1,338-foot (408 m) main span over the freeway using a Vierendeel truss and a ramp connecting to a protected cycletrack at street level on 1st Avenue Northeast.[50][51] It was officially named in honor of former U.S. Congressman John Lewis of Georgia by the Seattle City Council in August 2021 to recognize his civil rights activism amid criticism for not choosing a local namesake.[52][53]

The bridge and its connection to the station were first proposed in 2007 by the city government and studied by King County in 2011.[54][55] It was tentatively approved by Sound Transit in 2012 as a replacement for a larger parking garage, with the agency and the Seattle Department of Transportation (SDOT) agreeing to each fund $5 million towards its construction, estimated to cost $20 million at the time.[56] Several designs were considered, including a cable-stayed bridge, a tied-arch bridge, and an enclosed tube with hexagonal sections proposed by LMN Architects that was chosen by the city government in 2015.[57] The tube design would require additional structural supports, including a steel deck under the walkway, raising the project's costs to over $60 million.[57] The city applied for a $15 million grant from the federal government in 2015 that was rejected,[58] but the project instead received funds from the state government and a local transportation levy passed in 2015.[57][59]

The bridge project was put on hold in 2016 due to the rise in projected costs and a new design team was assembled by SDOT, to be led by VIA Architects.[60] The simpler design, estimated to cost $37.5 million in 2017, replaced the enclosed design with an uncovered tied-arch bridge that would be 16 feet (4.9 m) wide.[50][60] The main Vierendeel truss span was originally planned to use a proprietary lighting system for the handrails until the initial bids were $8 million over the estimated budget, leading to a redesign.[61] Construction on the bridge began in February 2020, with project costs estimated at $56 million.[62] The prefabricated trusses were manufactured in Tacoma and trucked to the bridge site for assembly and installation, which was delayed to May 2021 due to the COVID-19 pandemic.[63][64]

The station is also a major hub for buses in North Seattle with 22 routes operated by King County Metro, Sound Transit Express, and Community Transit.[74][75] Northgate station has four bays for buses around the perimeter of the light rail station, with access from Exit B.[38] King County Metro operates 13 routes that provide all-day connections to Ballard, Green Lake, Roosevelt, the University District, Lake City, Shoreline, and Mountlake Terrace. Several peak-only commuter routes provide further connections to First Hill, Lake Forest Park, Kenmore, and northern Shoreline.[38]

Four Sound Transit Express routes from Snohomish County terminate at Northgate station, having been truncated in October 2021 in lieu of continuing to Downtown Seattle. These routes provide all-day connections to Everett, Lynnwood, and Mountlake Terrace.[33] Community Transit truncated its entire University District commuter network to Northgate station when it opened, providing peak-only service to Lynnwood, Edmonds, Mukilteo, Everett, and Marysville.[38][76][77] Sound Transit previously operated express buses to Northgate from Everett on routes 505 and 506 from 2002 to 2003.[78]

Northgate Transit Center had been planned as the terminus of a bus rapid transit line under development by the Seattle Department of Transportation as part of the RapidRide+ program. The program was funded by the November 2015 "Move Seattle" levy and consisted of seven corridors throughout the city, including upgrades to Route 40 from Northgate to Ballard, Fremont, and Downtown Seattle.[79][80] The Northgate–Fremont project was downgraded in 2018, replacing its bus rapid transit elements with smaller-scale improvements to transit speed and reliability set to be complete in 2024.[81][82]

A second corridor, later named the RapidRide J Line, was originally scheduled to open in 2021 and planned to connect Northgate and Roosevelt to the University District, Eastlake and South Lake Union neighborhoods.[83] The project was scaled back to terminate near U District station due to budget shortfalls resulting from the COVID-19 pandemic, which caused a reduction in ridership and tax revenue, and completion was delayed to 2026.[84]