WSDOT - Projects in King County

This page lists current and future WSDOT highway improvement projects that are funded. To quickly find a project, click on a route in the map below.

Map of King County highways

Updated October 2008

Interstate 5

Federal Way: I-5/SR 18/SR 161 Triangle Improvements
WSDOT will improve the area where I-5, SR 18 and SR 161 connect in Federal Way. This includes replacing two cloverleaf loop ramps with flyover ramps for westbound SR 18 to southbound I-5 traffic and eastbound SR 18 to northbound I-5 traffic. We also will provide direct access to SR 161 from southbound I-5 and westbound SR 18 by building new exit ramps at S. 356th Street and S. 359th Street. Some funding for this project was provided by the 2005 Transportation Partnership Funding Package and the 2003 Nickel Funding Package.
Available Project Funds: $112 million
Estimated Total Project Cost: $209 to 227 million
Begin Construction: 2010
Contact: Bruce Nebbitt, 206-716-1170

Federal Way/Tukwila: I-5 - S. 272nd St. to Southcenter Paving
WSDOT will repair cracked pavement on I-5 between the S. 272nd Street interchange and Southcenter, update lighting and signage, and bring guardrails up to current standards.
Estimated Project Cost: $2.7 million
Begin Construction: July 2009
End Construction: September 2009
Contact: Paul Johnson, 206-768-5803

Federal Way/Kent: I-5 - 272nd Interchange Reconstruction
WSDOT will rebuild the S. 272nd Street interchange, which may involve replacement of the I-5 bridges over S. 272nd Street, realignment of the ramps, transit and/or HOV connections to the I-5 HOV lanes, and improvements to S. 272nd Street. Funding for project design is provided by the 2005 Transportation Partnership Package.
Begin Construction: pending
Total design cost: $11.6 million
Estimated Total Project Cost: to be determined
Contact: Paul Johnson, 206-768-5803

Federal Way: I-5 / S. 272nd Street Interchange Improvements
WSDOT will repave I-5 at the S. 272nd Street, S. 188th Street and Southcenter Parkway interchanges.
Begin Construction: Summer 2011
Estimated Total Project Cost: $1.4 million
Contact: Paul Johnson, 206-768-5803

Federal Way: I-5 - S. 320th Street City Center Access
The city of Federal Way, in partnership with WSDOT, is considering options to reduce collisions and traffic congestion at the S. 320th Street interchange with I-5. This project will also improve access to the Federal Way City Center.
Began environmental assessment: November 2007
Complete the environmental documentation: January/February 2010
Estimated Total Project Cost: $91.4 million (funded by the City of Federal Way)
Contact: Maryanne Zukowski, City of Federal Way, 253-835-2707

Tukwila to Seattle: I-5 Pavement Reconstruction and Bottleneck Improvement Projects
WSDOT plans to replace 16 miles of concrete on I-5 from Tukwila through downtown Seattle to Northgate. Our engineers recommend that the existing 9-inch-thick pavement be removed and replaced with thicker pavement reinforced with steel bars at the joints. The thicker concrete will ensure at least another 40 years of service, and the bars will help the roadway behave like a single unit rather than like individual concrete panels. Some funding for this project was provided by the 2003 Nickel Funding Package.
Available Project Funds: $124.6 million
Estimated Total Project Cost: over $3 billion
Begin Construction: 2017
Contact: Carol Hunter, 206-464-1219

Tukwila: I-5 - Central King to South Snohomish Bridges - Seismic Retrofit
We will retrofit 19 bridges on or near I-5 from central King County to south Snohomish County. Six of these bridges are located in Tukwila, and 13 are located in Mountlake Terrace and Lynnwood. These retrofits will bring all 19 bridges up to current seismic standards.
Begin Construction: Fall 2008
End Construction: Summer 2010
Contact: Amir Ahmadi, 425-225-8700

SeaTac: I-5/SR 509 Freight and Congestion Relief Projects
WSDOT is extending SR 509 at South 188th Street in SeaTac to connect with I-5 near South 211th Street. The extension will have six lanes, with two general purpose lanes and one carpool lane in each direction. This extension will ease congestion on I-5, improve service to the industrial district by allowing up to 9,000 trucks per day to bypass I-5, SR 99 and local streets, and provide a southern access to SeaTac International Airport. Some funding for this project was provided by the 2005 Transportation Partnership Funding Package and the 2003 Nickel Funding Package.
Available Project Funds: $86 million
Estimated Total Project Cost: $1.091 to $1.251 billion
Begin Construction: pending funding
Contact: Paul Johnson, 206-768-5803

Seattle to Edmonds: I-5 - Boeing Access Rd. to King/Snohomish County Line Pavement Repair
WSDOT will replace deteriorating concrete and grind down the worst areas of uneven pavement on northbound and southbound I-5 between S. 188th St. and the King/Snohomish County line and in the express lanes. The pavement on I-5 in King County is more than 40 years old, twice its planned design life.
Estimated Total Project Cost: $21 million
Begin Construction: Early 2009
End Construction: Late 2009
Contact: Jim Farris, 206-716-1163

Seattle: I-5 / Downtown Seattle Sign Bridges
WSDOT is designing modern replacements for several sign bridges over I-5 in downtown Seattle.
Total Project Funds for Design: $390,000
Begin Design: July 2011
Contact: Hung Huynh, 206-440-4311

Seattle: I-5 / Spokane St. Interchange Vicinity Special Bridge Repair
WSDOT will repair concrete on bottom slab of one bridge and replace expansion joints on five bridges in the vicinity of the I-5 Spokane Street Interchange.
Estimated Total Project Cost: $2.5 million
Begin Construction: Spring 2009
Contact: Paul Johnson, 206-768-5803

Seattle: I-5/James Street and Spring Street Ramp Terminals Signal Rebuild
WSDOT will remove and replace the signal system at the I-5/James Street and Spring Street ramp terminals, and make sidewalk and pavement repairs. Funding for this project was provided by the 2005 Transportation Partnership Funding Package.
Estimated Total Project Cost: $1.8 million
Begin Construction: Spring 2008
Estimated Completion: 2009
Contact: Gary L. McKee, 206-440-4612

Seattle: I-5/Roanoke Vicinity Noise Wall Project
WSDOT built noise walls on Boylston Avenue East between East Roanoke Street and East Lynn Street and on Harvard Avenue East from East Hamlin Street to East Roanoke Street. We will construct extensions on Boylston Avenue East and Harvard Avenue East to reduce freeway-generated noise along I-5 in the Eastlake area. Some funding for this project was provided by the 2005 Transportation Partnership Funding Package and the 2003 Nickel Funding Package.
Estimated Total Project Cost: $23.18 million
Begin Construction: Fall 2004
End Construction: Fall 2009
Contact: Erin Fletcher, 206-770-3504

Seattle: I-5 Ship Canal Bridge Noise Study
WSDOT will analyze and test for feasible noise reduction elements on the I-5 Ship Canal Bridge. Some funding for this project was provided by the 2005 Transportation Partnership Funding Package.
Total Project Funds: $5 million
Additional funding required for phases 2 and 3.
Testing Begins: 2008
Contact: Erin Fletcher, 206-770-3504

Seattle: I-5/Northeast 50th Street Signal Rebuild
WSDOT will replace the signal system at the northbound and southbound ramps at Northeast 50th Street. Crews will install a signal controller to connect it to the City of Seattle system. Crews will replace signing as needed and make sidewalk and pavement repairs.
Estimated Total Project Cost: $1.2 million
Begin Construction: 2009
Contact: Gary L. McKee, 206-440-4612

Seattle: I-5 / 5th Avenue NE to 92nd Street Noise Wall
WSDOT will add noise barriers on the east and west sides of I-5 from 5th Avenue NE to 92nd Street to improve the outdoor environment and reduce the existing traffic noise levels. Funding for this project is provided by the 2005 Transportation Partnership Package.
Estimated Total Project Cost: $14.3 million
Begin Construction: Spring 2008
Estimated Completion: 2009
Contact: Erin Fletcher, 206-770-3504

I-5 - Guardrail Retrofit - Safety
Crews will replace guardrail and install new light fixtures to improve safety on six ramps and one side street along I-5 between Swift Avenue and NE 70th Street.
Estimated total project cost: $2 million
Begin construction: Spring 2009
Estimated completion: Summer 2009
Contact: Janice Fahning 425-225-8799

SR 18

Covington to Maple Valley: SR 18 - Maple Valley to Issaquah Road - Roadside Restoration
WSDOT is restoring 63 acres of roadside affected by SR 18 widening between Maple Valley and Issaquah Hobart. We also will manage wetlands and stream channels created or enhanced during the widening project.
Estimated Total Project Cost: $6.3 million
Begin Construction & Planting: Summer 2007
Monitor New Planting: 2008-2011
Contact: Mike Askarian, 206-768-5860

North of Maple Valley: Holder Creek Bridge
WSDOT will repave the Holder Creek Bridge deck.
Estimated Total Project Cost: $630,000
Begin Construction: 2012
Contact: Gary L. McKee, (206) 440-4612

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Interstate 90

Bellevue/Issaquah/North Bend: I-90 Eastgate to North Bend Corridor Study
WSDOT will identify transportation-related problems and propose projects for the route development plan for I-90 between Eastgate in Bellevue and 468th Avenue SE in North Bend. WSDOT will recommend both short- and long-term projects to be implemented over the next 20 years as funding becomes available.
Estimated Total study Cost: $2 million
Estimated Completion: Spring 2008
Contact: Carol Hunter, (206) 464-1219

Seattle to Bellevue: I-90 Homer Hadley Bridge Repair
The I-90 Homer Hadley Floating Bridge opened to traffic in 1989, carrying the westbound lanes and center roadway. Since that time the expansion joints have continued to crack and deteriorate. To help protect drivers and extend the life of the freeway, we will replace the aged and worn expansion joints on the westbound bridge and center roadway.
Estimated Total Project Cost: $7 million
Begin Construction: May 2009
Estimated Completion: July 2009
Contact: Hien Trinh, (425) 956-2100

Seattle/Mercer Island/Bellevue: I-90 Two Way Transit and HOV
WSDOT will add HOV lanes on the outer roadways across Lake Washington while retaining the existing reversible operations on the center roadway. This project will improve access to Mercer Island and Bellevue Way, and will increase efficiency through reconfiguration of I-90 between Bellevue and Seattle.
Estimated Total Project Cost: $97.8 million
Begin Construction: Spring 2007
Estimated Completion: Early 2009
Contact: Doug Haight, (425) 649-4429

Mercer Island: I-90/Mt Baker Tunnel & Mercer Island LID - PLC Replacement
WSDOT will replace the systems that control and monitor ventilation, lighting, signals, electrical power distribution, emergency power and other tunnel systems.
Estimated Total Project Cost: $1.3 million
Begin Construction: July 2007
Estimated Completion: October 2008
Contact: Mikhail Brusser, (206) 440-4264

Bellevue to Issaquah: I-90 Eastside Bridges - Seismic Retrofit
WSDOT will retrofit 16 bridges to reduce the risk of earthquake damage to susceptible structures.
Estimated Total Project Cost: $9.4 million
Begin Construction: December 2008
Estimated Completion: October 2009
Contact: Hung Huynh, (206) 440-4311

Issaquah: I-90/Sunset Way Connection
WSDOT will build a permanent connection linking Sunset Way to the new I-90 interchange, pending the City of Issaquah's decision on a proposed bypass road.
Estimated Total Project Cost: $1.6 million
Begin Construction: 2009
Estimated Completion: 2010
Contact: Hung Huynh, (206) 440-4311

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SR 99

Seattle: SR 99/14th Street Interchange Illumination Rebuild
WSDOT will update illumination to meet current design manual recommendations. Crews will also update signs and sign lights.
Estimated Total Project Cost: $2.4 million
Begin Construction: Spring 2009
Contact: Gary L. McKee, (206) 440-4612

Shoreline: SR 99 - Shoreline Aurora Ave. - N Corridor Transit/HOV Lanes
WSDOT is working with the City of Shoreline to improve safety and traffic flow on State Route 99 between North 145th Street and North 205th Street in Shoreline. Crews will redesign and upgrade three miles of Aurora Avenue North to improve safety for the 38,000 to 45,000 vehicles and the large number of pedestrians that use this highway through Shoreline each day. Phase one (North 145th Street through North 165th Street) is complete. Phase two (North 165th Street through North 205th Street) will begin in late 2008/early 2009.
Estimated Total Project Cost: $69 million
Construction Began: Summer 2005
End Construction: 2012
Contact: Hung Huynh, (206) 440-4311; Kristen Overleese, City of Shoreline, (206) 546-0791; Kirk McKinley, City of Shoreline, (206) 546-3901

Seattle: SR 99 - Alaskan Way Viaduct & Seawall Replacement Program
The 1950s-era viaduct was damaged in the 2001 Nisqually earthquake, and the adjacent seawall is deteriorating. Both are at risk of failure in another earthquake. We will replace the viaduct's south end, between S. Holgate and S. King streets, with a new side-by-side roadway that has wider lanes, meets current earthquake standards and improves mobility for people and goods in the south of downtown area. For the central waterfront section, between S. King Street and the Battery Street Tunnel, there is an ongoing environmental process that is reviewing three alternatives – a bored tunnel, cut-and-cover tunnel and an elevated structure.
Available Program Funds: $2.4 billion
Begin Construction: Preliminary construction began in 2008. In 2010 crews will begin road and bridge construction to replace the southern mile of the viaduct. Construction on the viaduct's central waterfront replacement is expected to begin in 2011.
Contact: Kristy Van Ness, (206) 382-6361

Seattle: SR 99/Spokane Street Bridge to Alaskan Way Viaduct Pavement Rehab
WSDOT will replace broken concrete panels, grind the existing concrete roadway surface, rebuild the shoulders, replace the existing illumination system with breakaway features and upgrade guardrail.
Estimated Total Project Cost: $1.8 million
Begin Construction: Fall 2010
Contact: Bruce Nebbitt, (206) 716-1170

Seattle: SR 99/Aurora Bridge Painting
WSDOT will clean and paint bridge in order to preserve its structural integrity.
Estimated Total Project Cost: $19.1 million
Begin Construction: Early 2012
Contact: Gary L. McKee, (206) 440-4612

Seattle: SR 99 Aurora Bridge Fence
WSDOT, the City of Seattle and King County are working to prevent people from committing suicide by way of jumping off of the Aurora Bridge on State Route 99 in Seattle, in the Fremont and Queen Anne neighborhoods. The City of Seattle has installed suicide deterrence signs and phones which connect people directly to a crisis hotline or 9-1-1. WSDOT has brought together a team of experts to consider additional suicide prevention measures, like adding fences to the bridge. This type of preventative measure is a significant engineering and political challenge.
Estimated Total Project Cost: $7.5 million
Begin Construction: Summer 2009
Contact: Greg Phipps, (206) 440-4702

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SR 104

Shoreline/Mountlake Terrace: SR 104/5th Avenue NE to 15th Avenue NE Sidewalk
In this project crews will build a sidewalk on SR 104 between 15th Avenue NE and 5th Avenue NE. The sidewalk will run along the south side of SR 104 from 15th Avenue NE to just west of southbound I-5, and then run along the north side of SR 104 until 5th Avenue NE. Crews also will add a crosswalk, a signal at the crosswalk and drainage.
Begin Construction: Spring 2008
Estimated Completion: Spring 2008
Contact: John Lefotu, (206) 768-5647

Shoreline: SR 104/244th Street Southwest to Northeast 190th Street
WSDOT will remove damaged pavement and replace it with asphalt, seal cracks in the road and make other pavement repairs to improve the road surface and extend the life of the roadway. In addition, crews will make other improvements to this section of road to increase safety. Stage one, between 244th Street Southwest and 22nd Avenue Northeast, is complete. During stage two, crews will pave and re-stripe the roadway from the vicinity of 244th Street Southwest to Northeast 190th.
Begin Construction: spring 2007
Estimated Completion: 2008
Contact: Amir Ahmadi, (425) 225-8700
Estimated Total Project Cost for Stage1 and 2: $2.8 million

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SR 164

Auburn to Enumclaw: SR 164 Route Development Plan
SR 164 is an important rural and commuter highway; a regional highway for southeast King County; a "main street" for Auburn, Enumclaw and the Muckleshoot Indian Tribe and a main access for Enumclaw Plateau residents. This freight connector experiences mounting traffic congestion and has a number of high accident locations. Working with our partners and local communities, WSDOT will identify transportation-related problems and propose a list of projects in a route development plan for the SR 164 corridor.
Estimated Total Study Cost: $650,000
Began Study: Fall 2004
Estimated Completion: Summer 2008
Contact: Seth Stark, (206) 464-1288

SR 167

SR 167 - Valley Freeway Corridor Plan
State Route 167 is a primary highway connecting south King and north Pierce counties to the Seattle/Bellevue metropolitan area. The corridor serves a growing number of housing developments and lies along the largest freight distribution center in the region. To help reduce congestion and improve safety on SR 167 from South 180th Street in Renton to SR 161 in Puyallup, WSDOT, King and Pierce counties and cities along SR 167 are developing recommendations for transportation improvements on SR 167 to address growth over the next 25 years along SR 167.
Estimated Total Study Cost: $9.6 Million
Estimated Completion: Spring 2008
Contact: Carol Hunter, (206) 464-1219

Auburn: SR 167/15th Street Southwest to 15th Street Northwest HOV
WSDOT will build a carpool lane on northbound State Route 167 from 15th Street SW to 15th Street NW in Auburn. Crews will add meters and bypass lanes for carpools, vanpools and buses to northbound and southbound on-ramps between Auburn and Renton.
Estimated Total Project Cost: $42.9 million
Begin Construction: Winter 2006
Estimated Completion: Spring 2008
Contact: Joshua Cheatham, (253) 872-2958

Auburn to Renton: SR 167 - HOT Lanes Pilot Project
WSDOT will convert nine miles of HOV (high occupancy vehicle) lanes on SR 167 to high occupancy toll (HOT) lanes for four years to test the benefits of implementing HOT lanes. The lanes are open to carpools, vanpools, transit and toll-paying solo drivers. Tolls for HOT lanes are set to ensure that these lanes keep flowing even when regular lanes are congested.
Estimated Total Project Cost: $17.87 million
Begin Pilot Test: May 2008
Contact: Patty Rubstello, (425) 450-2720

Renton: SR 167/ I-405 to S. 180th Street
WSDOT will reduce congestion southbound from the SR 167 interchange with I-405 in Renton to South 180th Street on SR 167 by adding another southbound lane.
Estimated Total Cost: $50 million
Begin Construction: 2007
Estimated Completion: 2009
Contact: Colleen Gants, (425) 456-8500

Kent: SR 167/S. 277th to 8th St. E. HOV/HOT Lanes
WSDOT will widen SR 167 by adding a new southbound HOV/HOT lane from South 277th Street in Kent to Eighth Street East in Pierce County. This additional capacity will relieve congestion and improve safety for commuters heading south on SR 167.
Estimated Total Cost: $81 million
Begin Construction: 2009
Estimated Completion: 2010/2011
Contact: Ed Barry, (206) 716-1109

SR 169

Renton: SR 169/140th Way SE
WSDOT will make traffic signal improvements, construct HOV bypass lanes and other improvements at Maple Valley Highway (SR 169) from the I-405 northbound freeway ramps through the Cedar River Park entrance. Crews will also add an acceleration lane from the I-405 northbound off-ramp to eastbound SR 169.
Estimated Total Project Cost: $4.3 million
Begin Construction: 2007
Contact: Stacy Trussler, (425) 456-8563 or Bob Hanson (425) 430-7223

Maple Valley: SR 169/SE 264th Street to SE Wax Road
WSDOT will repair concrete and repave SR 169 from SE 264th Street to Southeast Wax Road.
Estimated Total Project Cost: $1.7 million
Begin Construction: 2009
Contact: Gary L. McKee, (206) 440-4612

Maple Valley: SR169/SE 231st Vicinity to 196th Avenue SE Vicinity
WSDOT will repave SR 169 in the vicinity of Southeast 231st Street to 196th Avenue Southeast.
Estimated Total Project Cost: $2.5 million
Begin Construction: Spring 2008
Contact: John Lefotu, (206) 768-5647

North of Enumclaw: SR 169/SE 416th Street Intersection
WSDOT will improve the intersection of SR 169 and Southeast 416th Street to increase safety and move traffic more efficiently. We expect to begin construction in 2009.
Estimated Total Project Cost: $2.5 million
Begin Construction: 2009
Estimated Completion: 2010
Contact: Hung Huynh, (206) 440-4311

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SR 181

Kent: SR 181/S. 180th Street to James Street Paving
WSDOT will pave and stripe SR 181 between S. 180th Street and James Street. In addition, crews will install new wheelchair ramps and traffic sensors at intersections.
Estimated Total Project Cost: $2.83 million
Begin Construction: Spring 2008
Estimated Completion: Summer 2008
Contact: Joshua Cheatham, (253) 872-2958

SR 202

North of Sammamish: SR 202 Corridor: Sahalee to Duthie Hill Road (292nd Ave S.) Corridor Study
SR 202 is a connector for increasingly urban areas in east King County between the cities of Sammamish, Snoqualmie, Redmond and North Bend. Within the eight-mile study area, safety and growth are concerns due to increase congestion, wear on the highway and collisions. Working with our partners and local communities, WSDOT will identify transportation-related problems and propose a list of short- and long-term recommendations to improve safety and mobility.
Estimated Total Corridor Study cost: $500,000
Estimate Completion: Summer 2008
Contact: Jean Mabry, (206) 464-1266

Woodinville: SR 202/SR 522 to Sammamish River Bridge Paving
Crews working for the city of Woodinville will pave 2.5 miles of roadway and enhance safety between SR 522 and the Sammamish River Bridge. The city of Woodinville is leading this project with funding contributions from WSDOT.
Estimated Total Project Cost: $1.3 million
Begin Construction: Spring 2008
Estimated Completion: Fall 2008
Contact: Hung Huynh, (206) 440-4311; Mick Monken, City of Woodinville, (425) 489-2700, ext. 2291

Redmond: SR 202/SR 520 to Sahalee Way Widening
WSDOT will widen almost three miles of SR 202 from SR 520 to Sahalee Way. Crews will build the project in two stages:

Stage 1 - SR 520 to East Lake Sammamish Parkway vicinity
WSDOT will add an additional lane in each direction between SR 520 and East Lake Sammamish Parkway and improve the intersection of SR 202 and East Lake Sammamish Parkway. They will also add bike lanes, sidewalks, drainage, a landscaped median, signing upgrades and make signal revisions at the SR 520 off-ramp and at Northeast 70th Street.
Begin Construction Stage 1: Fall 2004
Complete Construction Stage 1: Summer 2006

Stage 2 - East Lake Sammamish Parkway to Sahalee Way
WSDOT will build two new lanes, retaining walls, noise walls, bike lanes and sidewalks. They will replace the bridges at 196th Avenue Northeast and at Evans Creek. From 196th Avenue Northeast to Sahalee Way, crews will raise the roadway 14 feet to accommodate an existing landslide.
Begin Construction Stage 2: Winter 2006
Complete Construction Stage 2: Summer 2008
Estimated Total Project Cost: $82.7 million
Contact: Hien Trinh, (425) 956-2100

Fall City: SR 202/Preston-Fall City Road and Jct SR 203 - Intersection Improvements
WSDOT will construct sidewalks and a roundabout at the intersection of SR 202 and SR 203.
Estimated Total Project Cost: $4 million
Begin Construction: Spring 2007
Estimated Completion: Spring 2008
Contact: Dave Lindberg, (425) 814-7104

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SR 203

Carnation: SR 203 Tolt Hill Road NE Vicinity Improvements
WSDOT will increase safety along the corridor by improving 18 miles to reduce the risk of collisions.
Estimated Total Cost of the Project: $3.5 million
Begin Construction: 2010
Contact: Hung Huynh, (206) 440-4311

Fall City to Monroe: SR 203 Corridor Safety
WSDOT will increase safety along the corridor by improving the shoulder and intersection to reduce the risk of collisions.
Estimated Total Cost of the Project: $4.4 million
Begin Construction: 2009
Contact: Hung Huynh, (206) 440-4311

Interstate 405

Renton: I-405- I-5 to SR 169 Widening
During Stage 1 of this project, WSDOT will construct one new northbound lane and one new southbound lane on I-405 from I-5 to SR 167; construct one new southbound lane on SR 167 from I-405 to the SW 41st Street off-ramp; extend the SR 167 southbound HOV lane to begin at I-405; and replace the I-405 bridges over the Springbrook Main and Side Channel and Oakesdale Avenue with a new bridge.

During Stage 2, WSDOT will build the north and southbound lanes on I-405 between SR 167 and SR 169 and the I-405 SR 515 interchange.

Estimated Total Project Cost: Stage 1 - $136 million; Stage 2 - $173 million
Begin Construction: Stage 1 - 2007; Stage 2 - 2009
Estimated Completion: Stage 1 - 2010; Stage 2 - 2011
Contact: Colleen Gants, (425) 456-8500

Renton: I-405 - Renton HOV Improvements Project Direct Access at North 8th Street (Sound Transit)
WSDOT and Sound Transit plan to build ramps and a bridge connecting the northbound and southbound I-405 HOV lanes directly to North 8th Street in Renton.
Estimated Total Project Cost: $64.3 million
Begin Construction: Pending funding
Contact: Stacy Trussler, (206) 456-8563

Renton to Bellevue: I-405 / 44th Street to 112th Avenue SE Widening
WSDOT plans to build two northbound and southbound general purpose lanes on I-405 between NE 44th Street and 112th Avenue SE. This project addresses a major I-405 chokepoint where the existing roadway is one lane narrower than I-405 north of I-90. Adds two new lanes in each direction between NE 44th Street and 112th Avenue SE.

Additional regional funding required to extend improvements to SR 169 and I-90
Construction funds available in 2015

Estimated Total Project Cost: $167 million
Begin Construction: 2015
Estimated Completion: 2018
Contact: Colleen Gants, (425) 456-8500

Renton: I-405 / SR 515 Interchange Improvements
WSDOT is building a new half-diamond interchange on I-405 east of the I-405 / SR 167 interchange at Talbot Road (SR 515) to improve access to downtown Renton and relieve traffic demand on the I-405 interchanges at SR 167 and SR 169. In the future when additional funding is authorized, it is anticipated that a second half-diamond interchange will be constructed on I-405 west of the I-405 / SR 167 interchange at Lind Avenue. With the completion of a one-way couplet frontage road system to connect the two half-diamond interchanges, access to Renton and I-405 operations will be greatly improved. This current project is funded by the 2005 Transportation Partnership Package.
Estimated Total Cost of Construction: $110 million
Begin Construction: 2009
Estimated Completion: 2010
Contact: Colleen Gants, (425) 456-8500

Renton: I-405 Slide Repair and Culvert Replacement
On Dec. 3, 2007, heavy rainfall overwhelmed a culvert beneath I-405 in Renton. The culvert collapsed, threatening the stability of this section of the freeway. Crews have fixed the sinkhole and installed a pump and pipe system to divert Thunder Hills Creek away from the damaged culvert. In spring 2008 crews begin work to install a new culvert.
Estimated Total Cost of Construction: Up to $6 million
Begin Construction: Spring 2007
Estimated Completion: Summer 2008
Contact: Greg Phipps, (206) 440-4702

Renton: I-405 - Springbrook Creek Wetland & Habitat Mitigation Bank
WSDOT and the City of Renton launched an innovative partnership to re-establish and enhance over 130 acres of wetlands in the Renton area addressing the effects of development within the city and from WSDOT transportation projects. WSDOT and the City of Renton are building an interpretive boardwalk trail through the site to educate the public on the benefits of wetlands and the habitat they support.
Estimated Total Cost of Construction: $17 million
Begin Construction: March 2008
Estimated Completion: September 2008
Contact: Colleen Gants, (425) 456-8500

Renton: I-405 - Sunset Blvd NE to NE 44th Street - Seismic Retrofit
WSDOT will upgrade four bridges on I-405 between Sunset Boulevard NE and NE 44th Street to meet current seismic standards and better withstand earthquakes.
Estimated Total Cost of Construction: $1.6 million
Begin Construction: Spring 2008
Estimated Completion: Winter 2008
Contact: Hung Huynh, 206-440-4311

Bellevue: I-405 - South Bellevue Widening
WSDOT will widen I-405 within the city of Bellevue between 112th Avenue SE and SE 8th Street. Crews will build one new southbound lane from SE 8th Street to I-90 and one northbound lane from 112th Avenue to SE 8th Street; a new northbound structure over Coal Creek Parkway; and a new, three-lane, southbound bridge over I-90.
Estimated Project Cost: $211 million
Begin Construction: 2007
Estimated Completion: Fall 2009
Contact: Colleen Gants, (425) 456-8500

Bellevue: I-405 NE 8th Street to SR 520 Braided Crossing
WSDOT will build new structures to separate northbound I-405 traffic exiting to SR 520 from traffic entering I-405 in Bellevue; and add an eastbound lane along SR 520 between I-405 and 124th Avenue to separate the on- and off-ramp traffic.
Estimated Total Project Cost: $255 million
Begin Construction: 2009
Estimated Completion: 2012
Contact: Colleen Gants, (425) 456-8500

Bellevue: I-405 NE 10th Street Bridge Crossing
The City of Bellevue and WSDOT are building a new NE 10th Street bridge crossing to provide improved access in the north end of downtown Bellevue, and relieve congestion at the NE 8th Street interchange. The City is constructing the first phase and WSDOT will construct the bridge over I-405 in the scond phase.
Estimated Total Project Cost: $62.3 million
Begin Construction: 2006
Estimated Completion: 2009
Contact: Colleen Gants, (425) 456-850

Kirkland: I-405 - SR 520 to I-5 Widening
WSDOT will build one new northbound lane from NE 70th Street in Kirkland to SR 522 and from NE 195th to SR 527 in Bothell; one new southbound lane from SR 522 to SR 520; a new bridge at NE 132nd; and a separate lane for traffic entering I-405 from NE 160th and exiting to SR 522.
Estimated Total Project Cost: $345 million
Begin Construction: 2009
Estimated Completion: 2011
Contact: Colleen Gants, (425) 456-8500

Kirkland: I-405 - NE 132nd Street Interchange Improvements
WSDOT will construct a new half interchange to and from the north at NE 132nd Street in Kirkland. This project improves access and will reduce traffic congestion at this and other Kirkland area interchanges.
Estimated Total Project Cost: $57 million
Begin Construction: 2019
Estimated Completion: 2021
Contact: Colleen Gants, (425) 456-8500

Kirkland: I-405/Totem Lake Freeway Station/Northeast 128th Street Direct Access Ramp
WSDOT and Sound Transit are building a new bridge connecting NE 128th Street across I-405, and new HOV direct access ramps in the I-405 median. The project will serve the Totem Lake area of Kirkland including the Kingsgate Park-and-Ride lot and the proposed Totem Lake Transit Center on the Evergreen Hospital campus. It will improve east/west mobility across I-405 and give buses and carpools direct access to/from the I-405 HOV lanes.
Estimated Total Project Cost: $57.8 million
Begin Construction: June 2005
Estimated Completion: Spring 2008
Contact: Doug Haight, (425) 649-4429

SR 410

East of Enumclaw: SR 410/Clay Creek Outfall Washout Repair
WSDOT will repair the outfall of the box culvert, preserve the existing drainage and rebuild roadway shoulder side slopes. Crews will work to reestablish support for the outfall apron and wing walls of the box culvert. Crews also will place guardrail and repair and pave the roadway as needed.
Estimated Total Project Cost: $1.8 million
Begin Construction: Spring 2009
Estimated Completion: Winter 2009
Contact: Gary L. McKee, (206) 440-4612

SR 410 and SR 164 Roadside Safety Improvement
WSDOT will improve safety in the SR 410 and SR 164 corridors by constructing guardrail, flattening side slopes and maximizing the clear zone.
Estimated Total Project Cost: $1.2 million
Begin Construction: Winter 2008
End Construction: Spring 2008
Contact: Paul E. Johnson, (206) 768-5680

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SR 509

I-5/SR 509 Freight and Congestion Relief Projects
WSDOT will connect SR 509 at South 188th Street in SeaTac to I-5 near South 211th Street. The extension will have six lanes, with two general use and one HOV lane in each direction. Extending SR 509 will ease congestion on I-5, improve service to the industrial district by allowing up to 9,000 trucks per day to bypass I-5, SR 99 and local streets, and provide a southern access to SeaTac International Airport.
Cost Range: $898-987 million
Begin Construction: pending funding
Contact: Paul Johnson, (206) 768-5680

Tacoma/SeaTac: SR 509, Slayden Road Vicinity to S. Normandy Road Vicinity Paving
WSDOT will pave the roadway and restore safety features between Slayden Road and the King County line (Brown's Point and Dash Point vicinity) and South 192nd to SW 185th Street in King County.
Estimated Total Project Cost: $1.7 million
Begin Construction: Summer 2007
Estimated Completion: 2008
Contact: Bruce Nebbitt, (206) 716-1170

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SR 515

Renton: SR 515 / SE 192nd Street to Benson Road Access and Asphalt
WSDOT will construct a left turn pocket and raised traffic island to replace the existing two-way left turn lane. Crews will relocate existing traffic signals and adjust signal timing to allow a phase for the U-turn movement. The new configuration will prevent drivers from turning into each other while entering or exiting driveways, increasing driver safety. WSDOT will widen SR 515 to the west at the SE corner of SR 515 and SE 176th. Crews will install new signs and traffic loops. WSDOT will pave the roadway and restore safety features in the Renton vicinity from Southeast 192nd Street to Benson Road (108th Avenue Southeast).
Estimated Total Project Cost: $2.9 million
Begin Construction: Spring 2008
Estimated Completion: Summer 2008
Contact: Paul Johnson, 206-768-5680

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SR 516

WSDOT has no projects currently in design or under construction on SR 516.

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SR 518

Burien/SeaTac: SR 518 Corridor Improvement Projects
WSDOT is in the planning stage of two corridor improvement projects.

SR 509/SR 518 Interchange Project
WSDOT will evaluate an SR 509 southbound to eastbound freeway-to-freeway connection to address existing access and safety problems, and provide for anticipated growth.

Burien to Tukwila: SR 518 Sea-Tac Airport to I-5/I-405 Interchange Project
WSDOT will add a third eastbound lane between the North Airport Expressway and the I-5/I-405 interchange to improve mobility and safety, and accommodate projected airport traffic.
Estimated Total Project Cost: $30.8 million
Begin Construction: Summer 2007
End Construction: Fall 2009
Contact: Paul E. Johnson, (206) 768-5680

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SR 519

Seattle: SR 519/South Seattle Intermodal Access
SR 519 is a complex, two-phased project designed to increase mobility and safety for freight and vehicles traveling to and from the interstate system and the waterfront. It also benefits pedestrians, bicyclists and vehicles traveling in the stadium-area. In fall 2003, WSDOT opened Phase 1 of the project: the new South Atlantic Street on-ramp to I-5 and I-90. This on-ramp separates road and railway traffic and improves access between I-90 and waterfront locations such as the Port of Seattle and Seattle Ferry Terminal.
WSDOT is currently moving forward with Phase 2, which will provide access and increased mobility between I-90 and the waterfront. The design will also improve traffic flow and safety on South Royal Brougham Way by building a bridge over the railroad tracks. The project will be built using a design-build construction method. Construction is scheduled to begin in the fall of 2008; it will be operationally complete before major detours begin on the South Holgate Street to South King Street Viaduct Replacement Project.
Estimated Total Project Cost: $183.7 million
Begin Construction Phase 2: Fall 2008
Contact: Dave Sowers, (206) 267-3820

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SR 520

Seattle to Bellevue: SR 520 - Bridge Replacement and HOV Project
WSDOT will build a new seismically sound and safe bridge with full shoulders, a bike and pedestrian path; and will rebuild the roadway between I-5 in Seattle and I-405 in Bellevue. WSDOT is considering two different four-lane designs, as well as a six-lane alternative.
Cost Range: $3.25 - 4.01 billion
Begin Construction: 2009 (pending construction funding)
Contact: Julie Meredith, Project Director, 206-770-3568

Redmond: SR 520/West Lake Sammamish Parkway to SR 202 Widening
WSDOT will widen SR 520 from two to four lanes in each direction between West Lake Sammamish Parkway and SR 202 by adding an HOV lane and an add/drop lane. As part of this widening, crews will construct four new bridges: two on the mainline at SR 202 and two for the West Lake Sammamish Parkway ramps. Crews will also build an additional bridge, called a flyover ramp, that will connect westbound SR 202 to westbound SR 520. The flyover ramp will be open to traffic by spring 2008.
Estimated Total Project Cost: $105 million
Begin Construction: Spring 2007
Estimated Completion: 2011
Contact: Hien Trinh, (425) 956-2100

Bellevue to Redmond: SR-520 - I-405 to West Lake Sammamish Parkway Paving
WSDOT will repave five and a half miles of deteriorated roadway from 108th Avenue Northeast to West Lake Sammamish Parkway. Crews will also construct concrete approach slabs at four bridges and perform other minor work and safety improvements as needed.
Estimated Total Project Cost: $7.46 million
Begin Construction: Spring 2009
End Construction: Winter 2009
Contact: Gary McKee, (206) 440-4319

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SR 522

Bothell: SR-522/ Hall Road to Kaysner Way
WSDOT will pave both SR 522 from Hall Road to Kaysner Way and SR 527 from SR 522 to NE 185th Street.
Estimated Total Project Cost: $1.39 million
Begin Construction: Spring 2010
End Construction: Spring 2011
Contact: Hung Huynh, (206) 440-4311

Bothell: SR 522 - UW Bothell Cascadia CC Campus Direct Access
WSDOT will build a new south entrance to the UW Bothell and Cascadia Community College campus on SR 522. Crews will add a signal at the entrance, an exclusive exit lane to the campus at the southbound I-405 to westbound SR 522 off-ramp and a new bridge for the I-405 off-ramps constructed over the campus access street.
Estimated Total Project Cost: $50.7 million
Begin Construction: April 2008
End Construction: Fall 2009
Contact: Janice Fahning, (425) 225-8799

Kenmore: SR 522 - 83rd Place Northeast - Signal and Channelization (City of Kenmore Lead)
The City of Kenmore will signalize the intersection at 83rd Place Northeast, and provide an eastbound left turn lane at this intersection.
Estimated Total Project Cost: $440,000
Begin Construction: Spring 2007
Estimated Completion: Winter 2008
Contact: Sam Schuyler, (206) 440-4729

Bothell: SR 522 - Northeast 195th Street - Signal and Channelization
WSDOT will install a traffic signal at the SR 522 westbound on-ramp and Northeast 195th Street intersection and provide double left turn lanes on Northeast 195th Street. Crews will also widen the westbound on-ramp to extend the double lanes before tapering to one lane.
Estimated Total Project Cost: $1.9 million
Begin Construction: Spring 2007
Estimated Completion: Spring 2008
Contact: Dave Lindberg, (425) 814-7104

SR 527

WSDOT has no projects currently in design or under construction in the King County portion of SR 527. See Snohomish County projects.

SR 900

Tukwila: SR 900/S Boeing Access Road to I-5 Interchange
WSDOT will replace concrete panels and repave SR 900 from S. Boeing Access Road to I-5, repave the northbound I-5 collector distributor lane at SR 900, and upgrade lights and signs.
Estimated Total Project Cost: $1.2 million
Begin Construction: May 2008
Estimated Completion: September 2008
Contact: Hung Huynh, (206) 440-4311

Renton: SR 900/I-405 to Harrington Avenue NE Drainage and Paving
WSDOT will resurface 0.30 miles of pavement between I-405 and Harrington Avenue Northeast in Renton and replace the drainage system.
Estimated Total Project Cost: $1.9 million
Begin Construction: Spring 2008
Estimated Completion: Summer 2008
Contact: Joshua Cheatham, (253) 872-2958

Issaquah: SR 900 - SE 78th Street to Newport Way(Phase 2)
WSDOT will widen SR 900 from Newport Way to SE 78th Street, continuing the roadway expansion from I-90 to Newport Way completed in December 2004.
Estimated Total Project Cost: $53.2 million
Phase 1 Project Cost: $19.4 million
Phase 2 Project Cost: $33.8 million
Phase 1 Construction: Summer 2003 - Winter 2004
Phase 2 Construction: Summer 2008 - Winter 2009
Contact: Hung Huynh, (206) 440-4311

Other Regionwide Projects

Grotto: US 2 - Forest Service Road to Money Creek - Paving
WSDOT will repave three miles of US 2 between Forest Service Road and Money Creek, as well as install centerline rumble strips and guardrail.
Estimated Total Project Cost: $2.1 million
Begin Construction: Summer 2008
Estimated Completion: Fall 2008
Contact: Sharif Shaklawun, 206.440.4272

US 2 - West Side of Stevens Pass - Electronic Signage
WSDOT will install more than two miles of fiber optic cable along the south shoulder of the highway and two new overhead electronic sign structures between milepost 61.9 and milepost 64.32 at the Stevens Pass summit in King County.
Estimated Total Project Cost: $862,059
Begin Construction: August 2008
Estimated Completion: September 2008
Contact: David Kieninger, 888.461.8816

SR 11, SR 525 and SR 900 Roadside Safety Improvement
WSDOT will install guardrail, remove fixed objects and improve the roadside to reduce the severity of collisions along these routes. This region-wide project funded by the 2005 Transportation Partnership Package will increase driver safety along these state routes.
Estimated Total Cost for Projects: $800,000
Begin Construction: 2010

SR 169, SR 410, SR 525, SR 900 and SR 520 Roadside Safety Improvement
Using 2005 Transportation Partnership Funds, WSDOT will install guardrail, remove fixed objects and improve the roadside to increase driver safety along these state routes.
Estimated Total Cost for Projects: $1.2 million
Begin Construction: 2010

SR 92, SR 520, SR 530 and SR 534 Roadside Safety Improvement
Using 2005 Transportation Partnership Funds, WSDOT will install guardrail, remove fixed objects and improve the roadside to increase driver safety along these state routes.
Estimated Total Cost for Projects: $1 million
Begin Construction: 2010

Enumclaw Vicinity: SR 410 and SR 164 Roadside Safety Improvement
Using 2005 Transportation Partnership Funds, WSDOT will install guardrail, remove fixed objects and improve the roadside to increase driver safety along these state routes.
Estimated Total Cost for Projects: $1.2 million
Begin Construction: 2008

Issaquah Vicinity: Issaquah Traffic Lights
The City of Issaquah is leading this project to improve travel time and traffic flow along the city's main roadways. WSDOT is providing funding from the 2005 Transportation Partnership Package to update signal control technology, existing traffic signals, communication equipment and signal coordination timing at the city's intersections. Crews will also build a traffic management center and install closed circuit television and dynamic message signs to help the city relay real time traffic information to drivers.
Total Project Contribution by WSDOT: $1.5 million
Begin Construction: Undetermined
Contact: Gary Costa, City of Issaquah, 425-837-3400

Monroe Vicinity: SR 203 and SR 522 Roadside Safety Improvement
Using 2005 Transportation Partnership Funds, WSDOT will install guardrail, remove fixed objects and improve the roadside to increase driver safety along these state routes.
Estimated Total Cost for Projects: $600,000
Begin Construction: 2009

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Statewide Projects

Bridge Seismic Retrofit - Moderate Risk Zone

WSDOT will strengthen bridges in the Central Puget Sound area to make them more resistant to earthquake damage and extend their lifespan. Central Puget Sound has two seismic zones with the highest ground movement in the state. WSDOT will work to ensure the bridges continue to meet daily traffic needs, as well as stand up to earthquakes and the eroding effects of moving water.
Estimated Total Project Cost: $29.7 million
Begin Construction: 2008

Bridge Seismic Retrofit - High Risk Zone

WSDOT will strengthen bridges in the Central Puget Sound area to make them more resistant to earthquake damage and extend their lifespan. Central Puget Sound has two seismic zones with the highest ground movement in the state. WSDOT will work to ensure the bridges continue to meet daily traffic needs, as well as stand up to earthquakes and the eroding effects of moving water.
Estimated Total Project Cost: $57 million
Begin Construction: 2009