Environmental planning documents

2017 SEPA Addendum to the East Link Final EIS

Sound Transit and Washington State Department of Transportation (WSDOT) have prepared a State Environmental Policy Act (SEPA) Addendum for the East Link Extension, which is a light rail project that connects downtown Seattle to Mercer Island, Bellevue, and Redmond via Interstate 90.

The Addendum updates the Final Environmental Impact Statement (EIS) issued in July 2011 and subsequent 2013 and 2016 addenda by providing additional analysis and information about the project. It describes changes in operation of I-90 high occupancy vehicle lanes and project refinements associated with transit integration on Mercer Island, evaluates the potential impacts of these changes, and identifies changes to mitigation measures.

The Addendum and supporting materials can also be reviewed at local libraries and at Sound Transit 401 S. Jackson St., Seattle WA 98104. Hard copies of the Addendum, without the appendices, are free. Hard copies of the appendices are $15. CDs, which include both the Addendum and all appendices, are also free. Please contact Zack Ambrose (206) 903-7176 or via email at zack.ambrose@soundtransit.org to request copy of the Addendum.

2017 SEPA Addendum to the East Link Extension Final Environmental Impact Statement

2016 SEPA Addendum to the East Link Final EIS

Sound Transit has prepared a 2016 SEPA Addendum to the Sound Transit East Link Light Rail Project Final Environmental Impact Statement (July 2011). The Addendum addresses project refinements to the East Link Extension and provides new project related environmental information.

2016 SEPA Addendum to the East Link Extension Final Environmental Impact Statement (.pdf, 12 MB)

Federal Way Link Extension Final Environmental Impact Statement

Sound Transit and the Federal Transit Administration (FTA) published the Federal Way Link Extension Final Environmental Impact Statement (Final EIS), in accordance with the Washington State Environmental Policy Act (SEPA) and the National Environmental Policy Act (NEPA). The Final EIS examines project route and station alternatives, including the preferred alternative identified by the Sound Transit Board. It provides information about project alternatives, potential impacts on the natural and built environment, possible mitigation measures, and responds to public comments received during the Draft EIS comment period.

Sumner Sounder Station Access Improvements Environmental Reports

Sound Transit (ST) has prepared a State Environmental Policy Act (SEPA) Checklist along with Technical Reports and issued a Mitigated Determination of Nonsignificance (MDNS) under SEPA Rules (Chapter 197-11 WAC) for the Sumner Station Access Improvements Project. The project would enhance the access to Sumner’s Sounder Station, by constructing a parking garage along with non-motorized improvements in the City of Sumner, Pierce County, Washington. The project includes a new 4 1/2 story parking garage with approximately 623 parking stalls. On completion of the project, the total number of parking spaces would be 857, which is an increase of 505 parking spaces over the existing number of 352. Exit from the new parking garage would be restricted to right turn onto Thompson St from Station Lane. The project also includes access and non-motorized improvements, such as driveway replacements, sidewalks, bicycle storage in the parking garage, curb ramps, pedestrian signal, and an optional pedestrian bridge over the railroad. Based on the Checklist, Sound Transit has determined that this proposal will not have a probable significant adverse impact on the environment . 

Sounder Yard and Shop Environmental Reports

Sound Transit (ST) has prepared a State Environmental Policy Act (SEPA) Checklist along with Technical Reports and issued a Determination of Nonsignificance (DNS) under SEPA Rules (Chapter 197-11 WAC) for the Sounder Yard and Shops Project. The project includes building an operations and maintenance facility to service Sounder commuter trains. This project is part of the ST2 system expansion plan approved by voters in 2008 to accommodate existing and future ridership growth. Sound Transit proposes constructing a new, approximately 40,000 square-foot railroad storage facility on the Sounder Rail Yard site between Steilacoom Boulevard SW and 100th Street SW in the City of Lakewood. Additional right of way will be required for the project. The single-story building would contain maintenance bays, material storage areas, offices and facilities for employees. Supporting facilities such as roadway, site lighting, drainage facilities, and required utility infrastructure are included in the project. Contact Lauren Swift, Senior Environmental Planner, at lauren.swift@soundtransit.org or 206-398-5301 for hard copies. Hard copies are also available at the Pierce County Public Library in Lakewood.

Puyallup Sounder Station Improvements Environmental Evaluation Reports

Sound Transit (ST) has prepared a State Environmental Policy Act (SEPA) Checklist along with Technical Reports and issued a Determination of Nonsignificance (DNS) under SEPA Rules (Chapter 197-11 WAC) for the Puyallup Station Access Improvements Project. The project would enhance the access to the Puyallup’s Sounder Station, by constructing a parking garage along with non-motorized improvements in the City of Puyallup, Pierce County, Washington. Proposed improvements include a new five-level, approximately 503-space parking garage and expands an existing surface lot from 68 to 166 parking spaces. Based on the Checklist, Sound Transit has determined that this proposal will not have a probable significant adverse impact on the environment.

Link Light Rail Operations and Maintenance Satellite Facility Final Environmental Impact Statement

On September 25, 2015, Sound Transit published the Link Light Rail Operations and Maintenance Satellite Facility (OMSF) Final Environmental Impact Statement (Final EIS), in accordance with the Washington State Environmental Policy Act (SEPA). The Final EIS is also issued jointly by Sound Transit and the Federal Transit Administration (FTA) under the National Environmental Policy Act (NEPA) on October 2, 2015. The Final EIS evaluates OMSF alternatives and describes potential impacts on the natural and built environment, possible mitigation measures, and responds to public comments received during the Draft EIS comment period.

Link Light Rail Operations and Maintenance Satellite Facility Final Environmental Impact Statement

Tacoma Link Extension Environmental Evaluation Reports

Sound Transit and the Federal Transit Administration (FTA), in coordination with the City of Tacoma, have completed environmental review for the Tacoma Link Expansion project. The environmental analysis examined how the project could potentially affect the community and environment, and identifies proposed mitigation to address and reduce potential impacts, as needed. The environmental review indicates that no significant impacts are anticipated. With the analysis complete, it is now available for review by the public, agencies, and others.  

Tacoma Link Extension Environmental Evaluation Reports
 

Federal Way Link Extension Draft Environmental Impact Statement

Sound Transit and the Federal Transit Administration (FTA) released the Federal Way Link Extension Draft Environmental Impact Statement (Draft EIS) in accordance with the Washington State Environmental Policy Act (SEPA) and the National Environmental Policy Act (NEPA) for public, agency, and tribal review and comment. The Draft EIS evaluates light rail route and station alternatives and describes the project's potential effects on the natural and built environment.

Federal Way Link Extension Draft Environmental Impact Statement
 

Lynnwood Link Extension Final Environmental Impact Statement

On April 1, 2015, Sound Transit released the Lynnwood Link Extension Final Environmental Impact Statement (Final EIS), in accordance with the Washington State Environmental Policy Act (SEPA). The Final EIS is also issued jointly by Sound Transit and the Federal Transit Administration (FTA) under the National Environmental Policy Act (NEPA). The Final EIS examines project route and station alternatives, including the preferred alternative identified by the Sound Transit Board. The Final EIS provides information about project alternatives, potential impacts on the natural and built environment, possible mitigation measures, and responds to public comments received during the Draft EIS comment period.

Lynnwood Link Extension Final Environmental Impact Statement
 

Sound Transit Tacoma Trestle Track and Signal

Sound Transit has prepared a State Environmental Policy Act (SEPA) Checklist and issued a Determination of Nonsignificance (DNS) under the SEPA Rules (Chapter 197-11 WAC) for the Tacoma Trestle Track and Signal project. The project would construct improvements to the approximately 0.65 mile portion of Sounder Commuter Rail line between East D Street and East M Street in the City of Tacoma, Pierce County, Washington. Proposed improvements include replacement of an existing single-track trestle with a new double track bridge with tracks and crossovers, upgrades to the embankment along bridge approaches, signal upgrades, placement of additional earthen fill, and installation of retaining wall structures. Based on the Checklist, Sound Transit has determined that this proposal will not have a probable significant adverse impact on the environment.

Tacoma Trestle Track and Signal Determination of Nonsignificance

Tacoma Trestle Track and Signal SEPA Checklist
 

Long-Range Plan Draft Supplemental Environmental Impact Statement

Sound Transit has published the Long-Range Plan Draft Supplemental Environmental Impact Statement (DSEIS) for public, agency and tribal review and comment. The DSEIS describes the project's potential effects on the environment, nearby properties and other impacts. 

LRP Draft Supplemental Environmental Impact Statement
 

Link Operations and Maintenance Satellite Facility Draft Environmental Impact Statement

Sound Transit and the Federal Transit Administration (FTA) have published the Link Light Rail Operations and Maintenance Satellite Facility Draft Environmental Impact Statement (DEIS) for public, agency and tribal review and comment. The DEIS evaluates Operations and Maintenance Satellite Facility alternatives and describes the project's potential effects on the environment, nearby properties and other impacts. 

OMSF Draft Environmental Impact Statement
 

Sound Transit Positive Train Control

Sound Transit has prepared a State Environmental Policy Act (SEPA) Checklist and issued a Determination of Nonsignificance (DNS) under the SEPA Rules (Chapter 197-11 WAC) for the Positive Train Control Project. The project would construct 12 communication towers, which is the principal component of a federally mandated Positive Train Control (PTC) communication network. PTC system is an integrated information system for controlling train movements with safety and security. The towers are located entirely within the existing Sound Transit rail line right-of way in the cities of Lakewood and Tacoma, Pierce County, Washington. The proposed towers will be 60 feet in height, self-supporting monopoles and will not contain guy wires or lighting.  The radio equipment for the towers will be powered from an existing bungalow that is located next to each proposed tower site through trenched conduits. Based on the Checklist, Sound Transit has determined that this proposal will not have a probable significant adverse impact on the environment.

Determination of Nonsignificance

SEPA checklist
 

Determination of Significance and Scoping Notice for the Supplemental EIS

Sound Transit is preparing a Supplemental Environmental Impact Statement (Supplemental EIS) to update the Regional Transit Long-Range Plan (Long-Range Plan). The Long-Range Plan covers the Sound Transit District, which consists of the urbanized parts of King, Pierce, and Snohomish counties, extending roughly from Everett in the north, to Dupont in the south, bounded by Puget Sound on the west and the Cascade foothills on the east. This EIS supplements the original Regional Transit System Plan Final Environmental Impact Statement (1993 EIS) and the Final Supplemental Environmental Impact Statement on the Regional Transit Long-Range Plan (2005 SEIS). This Supplemental EIS will build on the 1993 EIS and 2005 SEIS, subsequent decision-making, environmental reviews of related actions, and include information analyzing the environmental impacts of updating the Long-Range Plan.

For additional information, please visit http://www.soundtransit.org/LongRangePlan
 

Lynnwood Draft Environmental Impact Statement

Sound Transit and the Federal Transit Administration (FTA) have published the Lynnwood Link Extension Draft Environmental Impact Statement (DEIS) for public, agency and tribal review and comment. The DEIS evaluates light rail route and station alternatives and describes the project's potential effects on the environment, nearby properties and transportation, as well as other impacts. 

Lynnwood Draft Environmental Impact Statement
 

Tacoma Link Expansion Alternatives Analysis Report and SEPA Addendum

The final Alternative Analysis Report and SEPA Addendum for the Sound Transit Tacoma Link Expansion project is available (please see links below). The Alternatives Analysis report serves as a SEPA Addendum to the Regional Transit Long-Range Plan Final Supplemental EIS (Sound Transit, 2005). The AA report includes the evaluation of potential corridors and options for the future expansion of the current Tacoma Link system. For more information, please contact Erin Hunter, erin.hunter@soundtransit.org, (206) 370-5511.

Tacoma Link Expansion Alternatives Analysis Report and SEPA Addendum
 

SEPA Addendum to the East Link Light Rail Project

Sound Transit has prepared the SEPA Addendum to the Sound Transit East Link Light Rail Project Final Environmental Impact Statement (July 2011). The Addendum addresses potential refinements to the East Link Extension and provides new project related environmental information.

Please contact Elma Borbe at (206) 398-5445 or via email elma.borbe@soundtransit.org if you would like a CD copy of the addendum, which is free, or a paper copy for $15.00. It can also be reviewed at local libraries and at Sound Transit office 401 S. Jackson St., Seattle, WA 98104. 

SEPA Addendum to the East Link Light Rail Project Final Environmental Impact Statement
 

Sound Transit Soil Remediation at 5715 Martin Luther King Jr. Way South (KC APN# 2341300125)

Sound Transit has prepared a State Environmental Policy Act (SEPA) Checklist and issued a Determination of Nonsignificance (DNS) under the SEPA Rules (Chapter 197-11 WAC) for Soil Remediation at 5715 Martin Luther King Jr. Way South (KC APN# 2341300125). Based on the Checklist, which provides information and analysis regarding the proposed Soil Remediation project, Sound Transit has determined that this proposal will not have a probable significant adverse impact on the environment. Copies of the Checklist and DNS are available at no charge by contacting Lauren Swift (206) 398-5301 or lauren.swift@soundtransit.org.

Sound Transit soil remediation at Martin Luther King Jr. Way S - SEPA Environmental Checklist (.pdf 172kb)
Sound Transit soil remediation at Martin Luther King Jr. Way S - Determination of Nonsignificance (.pdf 82kb)

 

Sound Transit Express Midday Bus Storage Notice of Determination of Nonsignificance

Sound Transit (the Central Puget Sound Regional Transit Authority) has issued a Determination of Nonsignificance (DNS) under the State Environmental Policy Act Rules (Chapter 197-11 WAC) for the following project:  Sound Transit Express Midday Bus Storage.  After review of a completed environmental checklist and other information on file with the agency, Sound Transit has determined this proposal will not have a probable significant adverse impact on the environment.

Copies of the DNS are available at no charge from Elma Borbe, Environmental Planner, Sound Transit, Union Station, 401 South Jackson St., Seattle, WA  98104-2826 or (206) 398-5445. 

Sound Transit Express Midday Bus Storage Project SEPA Environmental Checklist (.pdf 800kb)

 

Sounder Seattle-to-Tacoma Commuter Rail Easements and Improvements (Easements 3 & 4)

Sound Transit has prepared this State Environmental Policy Act (SEPA) Addendum for the Seattle-to-Tacoma Sounder Commuter Rail Easements and Improvement Project (Easements 3 and 4). This addendum provides additional information and analysis regarding Sound Transit's purchase of Easements 3 and 4 from the BNSF Railway Company for South Sounder Commuter rail. Each easement would provide for one commuter rail round trip between Seattle and Tacoma, for a total increase of two round trip trains. The existing system provides 9 round trip trains per day between Seattle and Tacoma. Two additional trips, for a total of 11, were purchased from BNSF in 2010 with Easements 1 and 2. The purchase of Easements 3 and 4 would add two more round trips, for a total of 13 round trips.

Easements 3 and 4 and associated improvements were analyzed in a SEPA Checklist published in April 2012 (Seattle-to-Tacoma Sounder Commuter Rail Easements and Improvement Project (Easements 3 and 4)). Sound Transit issued a Determination of Nonsignificance (DNS) on April 17, 2012.

 SEPA Environmental Checklist Addendum (pdf, 881 kb)
 

Sounder Seattle-to-Tacoma Commuter Rail Easements and Improvements (Easements 3 & 4)

Sound Transit proposes to purchase easements from BNSF Railway Company (BNSF) for the operation of two additional commuter rail trains in the Seattle-to-Tacoma rail corridor on existing BNSF right-of-way (Easements 3 & 4). As part of Sound Transit's proposed easement agreement with BNSF, track improvements are proposed within a section of the rail right-of-way through the cities of Tukwila, Renton, Kent, and Auburn, Washington. Track improvements would be constructed by BNSF and would include (1) adding new track; (2) track rehabilitation; (3) new high speed turnouts; (4) updates to existing signals, and construction of new signal facilities including new signals or signal bungalows; and (5) widening two crossings by constructing two new bridges adjacent to existing bridges, one over Longacres Way in Tukwila and one over Mill Creek in Kent.

Sound Transit has determined that the proposal does not have a probable significant adverse environmental impact on the environment. An environmental impact statement (EIS) is not required under RCW 43.21C.030(2)(c). This decision was made after a review of the completed SEPA environmental checklist and other information on file with the agency.

Easements 3&4 DNS (pdf, 117 kb)

SEPA Checklist - BNSF Easements 3&4 (pdf, 6.8 mb)


North Corridor Transit Project

Sound Transit and the Federal Transit Administration (FTA) are conducting scoping activities for an Environmental Impact Statement (EIS) they will prepare for the North Corridor Transit Project in King and Snohomish counties in the metropolitan Puget Sound region. Sound Transit is the lead agency under SEPA (State Environmental Policy Act) and FTA is the lead agency under NEPA (National Environmental Policy Act). The EIS will be a combined NEPA/SEPA document.

The North Corridor Transit Project is part of the Sound Transit 2 (ST2) plan approved by voters in 2008. The proposed project would begin at the Northgate Transit Center in Seattle and end at the Lynnwood Transit Center in Lynnwood. Sound Transit and FTA request comments on the purpose and need for the project, social, economic, or environmental issues for evaluation in the EIS, and alternatives for study in the draft EIS, including routes and station locations. The Environmental Scoping Information Report provides additional information, a map of the project area, results of the Alternatives Analysis, proposed route and station location alternatives for potential evaluation in the EIS, elements of the environment to be evaluated in the EIS, a schedule for the EIS process, and the preliminary project Purpose and Need Statement.

 Environmental Scoping Summary Report (.pdf, 3.5mb)
 

East Link Project

East Link Final Environmental Impact Statement (EIS) Available
Sound Transit has concluded preliminary engineering and an environmental analysis of the East Link alternatives. The East Link Final EIS is an in-depth analysis of light rail routes, stations, and maintenance facility alternatives considered for the project. The majority of Final EIS documents can be found on this website, except in the instance that a file was too large to host. For the list of available documents, and how to view the documents in hard copy and alternate formats, please visit our Final EIS page.
 

South 200th Street light rail extension

Sound Transit has published a SEPA addendum evaluating recent design updates for this project.
PDF iconSEPA Addendum South Link July 2011 (.pdf, 12 MB )


I-90 Two Way Transit Project

FTA has issued its Record of Decision (ROD) for the I-90 Two Way Transit Project and published a notice in the Federal Register. A ROD is a federal decision document that presents the basis for the agency's decision and summarizes mitigation measures. Although the Federal Highway Administration issued a ROD for the project in 2004, the FTA ROD enables the FTA to provide grant funding for Phase 3 of the project.

I-90 Two Way Transit Project ROD
 

North Corridor Transit project

Sound Transit and the Federal Transit Administration (FTA) are conducting "Early Scoping" to start the public planning and environmental processes for the The North Corridor Transit Project in King and Snohomish counties in the metropolitan Puget Sound region. The North Corridor Transit Project is part of the Sound Transit 2 (ST2) Plan approved by voters in 2008. The proposed project would start at the regional light rail system in the Northgate neighborhood of Seattle, and would extend northward to the cities of Shoreline, Mountlake Terrace, and Lynnwood. The North Corridor Transit Project extension project is an element of the region's Metropolitan Transportation Plan (the Puget Sound Regional Council's Transportation 2040), and Sound Transit's Long Range Transit Plan. These plans anticipate the eventual extension of expanded transit service north to Everett.

Early Scoping Information Report for North Corridor Project