4/17/2018
West Seattle and Ballard Link Extensions
Stakeholder Advisory Group Meeting | April 17, 2018
Agenda
Welcome & Introductions Previous Meeting Summary What We Heard – March Alternatives Development Process Level 1 Alternatives Evaluation Results Next Steps & Next Meeting
1 4/17/2018
What we heard - March
Early Scoping Summary Report
• Early scoping: Feb. 2 – March 5 • 3 public meetings, 1 agency meeting and online open house • 2,800+ total comments received via meetings and other methods • All comments captured in Early Scoping Summary Report
2 4/17/2018
External Engagement Report: March 2018
Neighborhood forums Spring Schedule
• 4/21: Chinatown / Int’l District
• 4/23: Denny / SLU / Seattle Center
• 5/2: Midtown / Westlake
• 5/5: Delridge / Avalon / Alaska Junction
• 5/9: SODO / Stadium
• 5/12: Ballard / Interbay / Smith Cove
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3 4/17/2018
Alternatives development process
Community engagement and collaboration
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4 4/17/2018
Alternatives development process
LEVEL 1 LEVEL 2 LEVEL 3 PREFERRED Alternatives development Alternatives development Alternatives development ALTERNATIVE*
Early-2018 Mid-2018 Late-2018 / Early-2019 Early-2019
Conduct early scoping Technical analysis Refine and screen alternatives Study ST3 representative Refine and screen project and alternatives alternatives Conduct Environmental Impact Statement Screen alternatives (EIS) scoping
PUBLIC INVOLVEMENT PUBLIC INVOLVEMENT PUBLIC INVOLVEMENT
*The Sound Transit Board identifies preferred alternatives and other alternatives to study.
Where we’re going
Getting to a Level 1 recommendation
• Today’s meeting, April 17th – Learn about the Level 1 alternatives and evaluation results • Next meeting, April 24th – Collectively make recommendations that will be shared with the Elected Leadership Group and Sound Transit Board
5 4/17/2018
Screening process
Broad range of initial alternatives
Refine remaining alternatives
Further evaluation
Preferred Alternative
Purpose and need
• Provide high quality rapid, reliable, and efficient peak and off-peak light rail transit service to communities in the project corridors defined in ST3.
• Improve regional mobility by increasing connectivity and capacity through downtown Seattle to meet projected transit demand.
• Connect regional growth centers as described in adopted regional and local land use, transportation, and economic development plans and Sound Transit’s Regional Transit Long-Range Plan.
• Implement a system that is consistent with the ST3 Plan that established transit mode, corridor, and station locations and that is technically feasible and financially sustainable to build, operate, and maintain.
• Expand mobility for the corridor and region’s residents, which include transit dependent, low income, and minority populations.
• Encourage equitable and sustainable urban growth in station areas through support of transit-oriented development, station access, and modal integration in a manner that is consistent with local land use plans and policies.
• Preserve and promote a healthy environment and economy by minimizing adverse impacts on the natural, built and social environments through sustainable practices.
6 4/17/2018
Evaluation criteria
• Reliable service • Financial sustainability • Travel times • Historically underserved populations • Regional connectivity • Station area land use plan consistency • Transit capacity • Modal integration • Projected transit demand • Station area development opportunities • Regional growth centers served • Environmental effects • ST Long-Range Plan consistency • Traffic operations • ST3 consistency • Economic effects (new) • Technical feasibility
Purpose and need Provide high quality rapid, reliable and efficient peak and off-peak light rail transit service to communities in the project corridors defined in ST3
Level 1 criteria and measure Reliable service • Potential service interruptions and recoverability Travel times • Light rail travel times
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7 4/17/2018
Purpose and need Improve regional mobility by increasing connectivity and capacity through downtown Seattle to meet projected transit demand
Level 1 criteria and measure Regional connectivity Projected transit demand • Network integration and operational • Ridership potential flexibility to meet future demand Transit capacity • Passenger carrying capacity in downtown
15
Purpose and need Connect regional growth centers as described in adopted regional and local land use, transportation and economic development plans and Sound Transit’s Long-Range Plan
Level 1 criteria and measure Regional centers served • Station proximity to PSRC-designated regional centers Sound Transit Long-Range Plan consistency • Accommodates future light rail extensions beyond ST3
16
8 4/17/2018
Purpose and need Implement a system that is consistent with the ST3 Plan that established transit mode, corridor and station locations and that is technically feasible and financially sustainable to build, operate and maintain Level 1 criteria and measures
ST3 consistency Financial sustainability • Mode, route and general station • Qualitative capital cost locations per ST3 comparison • Potential operating plan effects Technical feasibility • Engineering constraints • Constructability issues • Operational constraints
17
Purpose and need Expand mobility for the corridor and region’s residents, which include transit dependent, low income and minority populations
Level 1 criteria and measure Historically underserved populations • Opportunities for historically underserved populations
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9 4/17/2018
Purpose and need Encourage equitable and sustainable urban growth in station areas through support of transit-oriented development, station access and modal integration in a manner that is consistent with local land use plans and policies Level 1 criteria and measures Station area land use plan Station area development consistency opportunities • General station locations consistent with • Development potential local land use plans • Station proximity to Seattle-designated urban centers / villages Modal integration • Bus / rail and rail / rail integration • Bicycle, pedestrian and persons
with limited mobility connectivity 19
Purpose and need Preserve and promote a healthy environment and economy by minimizing adverse impacts on the natural, built and social environments through sustainable practices
Level 1 criteria and measure Environmental effects Economic effects • Protected natural resources • Freight movement and access • Protected built and social environment on land and water • Burden on historically underserved • Business and commerce effects populations Traffic operations • Traffic circulation and access
20
10 4/17/2018
Level 1 alternatives evaluation
West Seattle/ Duwamish
Interbay/Ballard
Downtown
SODO ST3 Representative Project Study segments 22
11 4/17/2018
Avoids Dravus interchange
Fixed bridge supports more reliable service
= Key Findings
(Compared to ST3 Representative Project) Sample segment Key Level 1 findings – Sample alternative 23
Sample segment Sample alternative
Evaluation Measures
Fixed bridge supports more reliable service
ST3 Representative Project (Baseline)
Elliott/15th / 16th / Fixed Bridge
West of BNSF / 20th / 17th / Fixed Bridge
West of BNSF / 20th / 17th / Tunnel
East of BNSF/14th/Movable Bridge
Elliott/Armory Avoids Dravus Way/14th/Tunnel interchange
West of BNSF / 20th / Tunnel
Higher Performance Comparable Performance Lower Performance
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Sample segment summary
ST3 Representative Project • Baseline for comparison • Avoids 15th Ave/Dravus interchange Alternatives with Elliott/15th/16th/Fixed Bridge more potential • Supports more reliable service Alternative • Key findings
Alternative • Key findings Alternatives with greater challenges Alternative • Key findings
Not practical Alternative • Key findings suggestions Alternative • Key findings
25
• Map of alternative
• Evaluation measures
• Segment summary
• Small Group Discussion
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Level 1 alternatives
West Seattle/Duwamish
• ST3 Representative Project
• Pigeon Ridge/West Seattle Tunnel
• West Seattle Bridge/ Fauntleroy
• Yancy Street/West Seattle Tunnel
• Oregon Street/Alaska Junction
• West Seattle Golf Course/ Alaska Junction
28
14 4/17/2018
West Seattle/Duwamish Early scoping feedback 29
West Seattle/Duwamish Level 1 alternatives 30
15 4/17/2018
Difficult design Design and construction and construction constraints through at Pigeon Point Duwamish
Good coverage of rider sheds
Neighborhood impacts
Terminal station is constrained; difficult = Key Findings extension to south West Seattle/Duwamish Key Level 1 findings – ST3 Representative Project 31
West Seattle/Duwamish ST3 Representative Project
Evaluation Measures
ST3 Representative Project (Baseline)
Pigeon Ridge / West Seattle Tunnel
West Seattle Bridge / Fauntleroy
Yancy Street / West Seattle Tunnel
Oregon Street / Alaska Junction
West Seattle Golf Course / Alaska Junction
Higher Performance Comparable Performance Lower Performance
16 4/17/2018
Avoids major Two tunnels and Port areas underground stations
Fewer neighborhood impacts Potential in-water work in Lower Duwamish Superfund site
Improved transition to extend south in future = Key Findings
(Compared to ST3 Representative Project) West Seattle/Duwamish Key Level 1 findings – Pigeon Ridge/West Seattle Tunnel 33
West Seattle/Duwamish Pigeon Ridge/ West Seattle Tunnel
Evaluation Measures
Two tunnels; potential constructability and cost issues; fewer curves
ST3 Representative Project (Baseline)
Pigeon Ridge / West Seattle Tunnel
West Seattle Bridge / Fauntleroy
Yancy Street / West Seattle Tunnel Duwamish crossing- Good future Oregon Street / possible Superfund Alaska Junction extension to site, in-water work, south West Seattle Golf golf course edge Course / Alaska Junction
Higher Performance Comparable Performance Lower Performance
17 4/17/2018
Design and construction Isolated station; constraints through Port areas near Port property
Avoids Delridge neighborhood but affects properties along Fauntleroy
Avoids Pigeon Point
Avoids sensitive natural areas
Improved transition to extend south in future = Key Findings
(Compared to ST3 Representative Project) West Seattle/Duwamish Key Level 1 findings – West Seattle Bridge/Fauntleroy 35
West Seattle/Duwamish West Seattle Bridge/ Fauntleroy
Evaluation Measures
Good future extension to south
ST3 Representative Project Avoids sensitive (Baseline) environmental areas
Pigeon Ridge / in Pigeon Point and West Seattle Tunnel Longfellow Creek
West Seattle Bridge / Fauntleroy
Yancy Street / West Seattle Tunnel Affect Port and Oregon Street / Alaska Junction business operations
West Seattle GolfDelridge and Alaska Junction Course / Alaska Junction stations on periphery of land use centers Higher Performance Comparable Performance Lower Performance
18 4/17/2018
Lessens effects to Design and construction neighborhoods but constraints through Port areas passes over Nucor
Avoids Pigeon Long tunnel Point
Consolidates stations; less pop/emp served
Improved transition to extend south in future = Key Findings
(Compared to ST3 Representative Project) West Seattle/Duwamish Key Level 1 findings – Yancy Street/West Seattle Tunnel 37
Yancy Street/ West West Seattle/Duwamish Seattle Tunnel
Evaluation Measures
Consolidates stations; lessless pop/pop/emp servedserved
ST3 Representative Project (Baseline)
Pigeon Ridge / West Seattle Tunnel Fewer neighborhood impacts West Seattle Bridge / Fauntleroy
Yancy Street / West Seattle Tunnel
Oregon Street / Alaska Junction Affects Port West Seattle Golf Doesn’t directly serve and business Long tunnel; Course / Alaska Avalon and Delridge Junction operations potential cost issues land use centers Higher Performance Comparable Performance Lower Performance
19 4/17/2018
Design and construction Avoids Pigeon constraints through Port areas Point
Affects Oregon St and 44th Ave
Avoids Fauntleroy and Alaska St
= Key Findings
Improved transition to (Compared to ST3 extend south in future Representative Project) West Seattle/Duwamish Key Level 1 findings – Oregon Street/Alaska Junction 39
Oregon Street/ West Seattle/Duwamish Alaska Junction
Evaluation Measures
Good transit integration at Alaska Junction Station
ST3 Representative Project (Baseline)
Pigeon Ridge / West Seattle Tunnel Generally similar Affects Port and business operations, to Representative West Seattle Bridge / Project Fauntleroy and also near California Yancy Street / West Seattle Tunnel
Oregon Street / Alaska Junction
West Seattle Golf Course / Alaska Junction Affects Oregon St Higher Performance Comparable Performance Lower Performance and 44th Ave
20 4/17/2018
Eliminates station; less pop/emp served
Fewer neighborhood impacts
Short tunnel with station under Alaska St Affects Golf Course (4(f) resource); requires demonstrating no other prudent and feasible alternative = Key Findings
(Compared to ST3 Representative Project) West Seattle/Duwamish Key Level 1 findings – West Seattle Golf Course/Alaska Junction 41
West Seattle/Duwamish West Seattle Golf Course / Alaska Junction
Evaluation Measures
Doesn’t serve Avalon; affects golf course
ST3 Representative Project Eliminates station; (Baseline) less pop/emp servedPigeon Ridge / West Seattle Tunnel
West Seattle Bridge / Fauntleroy
Yancy Street / West Seattle Tunnel Golf course 4(f) resource; potential habitat impacts; Oregon Street / Alaska Junction some fewer residential impacts
West Seattle Golf Course / Alaska Junction
Higher Performance Comparable Performance Lower Performance
21 4/17/2018
Section 4(f)
• Stipulates that United States Department of Transportation (USDOT) agencies, such as the Federal Transit Administration (FTA), cannot approve the use of land from publicly owned parks, recreational areas, wildlife and waterfowl refuges, or public and private historical sites unless:
- There is no feasible and prudent avoidance alternative to the use of land; and includes all possible planning to minimize harm to the property resulting from such use; OR - The Administration determines that the use of the property will have a de minimis impact
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West Seattle/Duwamish summary ST3 Representative Project • Baseline for comparison
Alternatives • Avoids Fauntleroy and Alaska; better orientation south Oregon Street/Alaska Junction with more • Affects Oregon St and 44th Ave potential • Lessens effects to Junction and Delridge; better orientation south West Seattle Bridge/Fauntleroy • Creates isolated Delridge Station Pigeon Ridge/West Seattle Tunnel • Lessens effects to Port, Junction, Delridge; better orientation south • Requires two tunnels; may require 3rd Party funding • Lessens effects to Junction and Delridge; better orientation south Alternatives Yancy Street/West Seattle Tunnel • Consolidates stations; potentially not consistent with ST3 Plan with greater • Requires tunnel; may require 3rd Party funding challenges • Crosses golf course, Section 4(f) West Seattle Golf Course/Alaska • Lessens effects to Junction, Delridge Junction (Tunnel) • Eliminates station; potentially not consistent with ST3 Plan Tunnel under Duwamish • Impractical tunnel depth and length • Existing structure not built to accommodate LRT Not practical West Seattle Bridge suggestions • Constructability issues Gondola, rail/bus bridge • Mode not consistent with ST3 Plan Extensions to Alki, Admiral, etc. • Not included in ST3 Plan or long range plan 45
West Seattle/Duwamish Level 1 alternatives 46
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Level 1 alternatives
SODO
• ST3 Representative Project
• Massachusetts Tunnel Portal
• Surface E-3
48
24 4/17/2018
SODO Early scoping feedback 49
SODO Level 1 alternatives 50
25 4/17/2018
Temporary impact to Ryerson Base Modifications to WSDOT during construction ramps and potential Limited area for impacts to planned “S” construction phasing development
Ground improvements Cut-and-cover construction required for elevated guideway Temporary closure of potential impacts along 5th and elevated SODO Station Royal Brougham for cut- Avenue S and-cover construction
= Key Findings SODO 51 Key Level 1 findings – ST3 Representative Project 51
SODO ST3 Representative Project
Evaluation Measures
ST3 Representative Project (Baseline)
Massachusetts Tunnel Portal
Surface E-3
Higher Performance Comparable Performance Lower Performance
26 4/17/2018
Avoids impact to Ryerson Base
Grade separation Avoids modifications to at Holgate WSDOT ramps and potential impacts to “S” development
Reduced need for More property Longer tunnel; Reduces cut-and-cover ground improvements required poor soils construction on 5th Ave in for elevated guideway Chinatown/Int’l District
= Key Findings
(Compared to ST3 Representative Project) SODO Key Level 1 findings – Massachusetts Tunnel Portal 53
SODO Massachusetts Tunnel Portal
Evaluation Measures
ST3 Representative Project (Baseline)
Massachusetts Tunnel Portal
Surface E-3
Higher Performance Comparable Performance Lower Performance Reduces potential effects to freight, traffic, and business during construction Avoids potential effects to Longer tunnel historic INS building; alignment; more reduces cut-and-cover in property required Chinatown/Int’l District
27 4/17/2018
Permanent impact Increased area available to Ryerson Base Potential permanent Grade separation at for construction; less closure of Royal Lander and Holgate service disruption Brougham
At-grade SODO Stadium Station on Station Reduced need for both lines ground improvements Avoids modifications to for elevated guideway WSDOT ramps
= Key Findings
(Compared to ST3 Representative Project) SODO Key Level 1 findings – Surface E-3 55
SODO Surface E-3
Evaluation Measures
ST3 Representative Project (Baseline)
Massachusetts Tunnel Portal
Surface E-3
Higher Performance Comparable Performance Lower Performance
Improves light rail network reliability; Eliminates existing grade crossings at Avoids modifications to WSDOT two Stadium Stations provides greater Lander and Holgate Streets ramps; increased area available for regional connectivity construction; less service disruption
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International District/Chinatown Station
57
International District/Chinatown Station
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International District/Chinatown Station
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SODO summary
ST3 Representative • Baseline for comparison Alternatives Project with more potential • Less service disruption during construction Surface E-3 • Accommodates Stadium Station on both lines • Eliminates existing grade crossings at Lander, Holgate; closes Royal Brougham • Reduces cut-and-cover construction on 5th Ave in Chinatown/Int’l District • Less service disruption during construction Massachusetts Portal • Eliminates existing grade crossing at Holgate • Requires longer tunnel; more property; may require 3rd Party funding
Maintain buses on E-3 • Not practical due to ROW constraints
Not practical suggestions First Ave alignment • Alignment and stations locations not consistent with ST3
Design for potential extension south to • Not included in ST3 or long range plan Georgetown
61
SODO Level 1 alternatives 62
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Level 1 alternatives
Downtown Seattle
• ST3 Representative Project
• 5th/Mercer
• 5th/Harrison
• 6th/Boren/Roy
• 8th/6th/Republican
• 5th/Roy/Consolidated SLU Station
64
32 4/17/2018
Downtown Early scoping feedback 65
Downtown Level 1 alternatives 66
33 4/17/2018
Tunnel portal in limited ROW
Underground sewer conflict on Republican Street
Station under Tunnel construction SR 99 off-ramp through/under building tie-backs
= Key Findings Downtown Key Level 1 findings – ST3 Representative Project 67
Downtown ST3 Representative Project
Evaluation Measures
ST3 Representative Project (Baseline)
5th/Harrison
5th/Mercer
6th/Boren/Roy
8th/6th/Republican
5th/Roy/Consolidated SLU Station
Higher Performance Comparable Performance Lower Performance
34 4/17/2018
Station construction under existing Westlake Station Reduced underground sewer conflict
Shorter alignment
Decreased station area = Key Findings coverage; potentially move (Compared to ST3 Representative Project) Denny Station south Downtown Key Level 1 findings – 5th/Harrison 69
Downtown 5th/Harrison
Construction Evaluation Measures under existing Westlake Station Generally comparable to more challenging ST3; off-setting pros/cons
ST3 Representative Project (Baseline)
5th/Harrison
5th/Mercer
6th/Boren/Roy
8th/6th/Republican
5th/Roy/Consolidated SLU Station
Higher Performance Comparable Performance Lower Performance
35 4/17/2018
Tunnel portal near steep slope and in park property
Station construction under existing Westlake Station Larger underground sewer conflict on Mercer Street
Potential effects to Mercer during construction
Increased station = Key Findings area coverage Longer alignment (Compared to ST3 Representative Project) Downtown Key Level 1 findings – 5th/Mercer 71
Downtown 5th/Mercer
Evaluation Measures
Larger underground sewer conflict on Mercer Street; construction under existing Westlake Station
ST3 Representative Tunnel portal Project on steep slope, (Baseline) park property
5th/Harrison
5th/Mercer
6th/Boren/Roy Potential effects to traffic and freight on 8th/6th/Republican Mercer during construction 5th/Roy/Consolidated SLU Station
Higher Performance Comparable Performance Lower Performance
36 4/17/2018
Tunnel portal near steep slope and in park property
Reduced underground sewer conflict
Tunnel construction under/adjacent to I-5 walls; avoids tiebacks on 5th Ave
= Key Findings Increased station Longer alignment area coverage (Compared to ST3 Representative Project) Downtown Key Level 1 findings – 6th/Boren/Roy 73
Downtown 6th/Boren/Roy
Evaluation Measures
Avoids underground sewer conflicts
ST3 Representative Project (Baseline) Seattle Center Station on edge of Uptown 5th/Harrison urban center; degraded ped/bike access 5th/Mercer
6th/Boren/Roy
8th/6th/Republican Tunnel portal on steep slope, 5th/Roy/Consolidated park property SLU Station
Higher Performance Comparable Performance Lower Performance
37 4/17/2018
Construction risk of Longer alignment, tunneling under I-5 at deeper station two locations
Location of Midtown Station not consistent with ST3 plan
= Key Findings
(Compared to ST3 Representative Project) Downtown Key Level 1 findings – 8th/6th/Republican 75
Downtown 8th/6th/Republican
Evaluation Measures
Midtown Station location not consistent with ST3 plan
ST3 Representative Project (Baseline) Longer alignment; construction under I-5; th 5 /Harrison deeper Midtown Station
5th/Mercer
6th/Boren/Roy
8th/6th/Republican
5th/Roy/Consolidated Longer walk/bike SLU Station distance to commercial core Higher Performance Comparable Performance Lower Performance
38 4/17/2018
Tunnel portal near steep slope and in park property
Station construction under existing Westlake Station Reduced underground sewer conflict
Number of stations not consistent with ST3 plan
= Key Findings Longer alignment (Compared to ST3 Representative Project) Downtown th Key Level 1 findings – 5 /Roy/Consolidated SLU Station 77
Downtown 5th/Roy/Consolidated SLU Station
Evaluation Measures Consolidated station reduces constructability issues
Number of stations not consistent with ST3 plan
ST3 Representative Project (Baseline) Seattle Center Station on edge of Uptown urban 5th/Harrison center; degraded ped/bike access 5th/Mercer
6th/Boren/Roy Tunnel portal on steep slope,
8th/6th/Republican park property
5th/Roy/Consolidated SLU Station Reduced traffic impacts during Higher Performance Comparable Performance Lower Performance construction
39 4/17/2018
Downtown summary ST3 Representative Project • Baseline for comparison
• Avoids utility conflicts on Republican and station under SR 99 off-ramp Alternatives with 5th/Harrison • Decreased station coverage; potentially move Denny Station south more potential • Avoids utility conflicts on Republican and station under SR 99 off-ramp 6th/Boren/Roy • Increases construction risk due to I-5 walls along 6th Ave; avoids tiebacks on 5th Ave
• Avoids utility conflicts on Republican and station under SR 99 off-ramp Alternatives with 5th/Mercer • Increases construction risk due to large sewer on Mercer greater challenges 5th/Roy/Consolidated SLU • Avoids utility conflicts on Republican and station under SR 99 off-ramp Station • Consolidates stations; potentially not consistent with ST3
• Increases construction risk due to two crossings under I-5 8th/6th/Republican (First Hill) • First Hill station not consistent with ST3
Use Downtown Seattle Transit • Existing DSTT capacity constraints Not practical Tunnel (DSTT) suggestions Design for potential extensions • Extensions to north and/or east not included in ST3 or long range plan to north and/or east
79
Downtown Level 1 alternatives 80
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Level 1 alternatives
Interbay/Ballard
• ST3 Representative Project
• Elliott/15th/16th/Fixed Bridge
• West of BNSF/20th/17th/Fixed Bridge
• West of BNSF/20th/17th/Tunnel
• East of BNSF/14th/Movable Bridge
• Elliott/Armory Way/14th/Tunnel
• West of BNSF/20th/Tunnel
82
41 4/17/2018
Interbay/Ballard Early scoping feedback 83
Interbay/Ballard Level 1 alternatives 84
42 4/17/2018
Proximity to existing bridge; constructability Affects traffic on Affects issues Elliott and 15th Fishermen’s Terminal
Fully grade separated alignment
Water crossing permits required Affects service reliability due to movable bridge Affects property in station area
= Key Findings Interbay/Ballard Key Level 1 findings – ST3 Representative Project 85
Interbay/Ballard ST3 Representative Project
Evaluation Measures
ST3 Representative Project (Baseline)
Elliott/15th / 16th / Fixed Bridge
West of BNSF / 20th / 17th / Fixed Bridge
West of BNSF / 20th / 17th / Tunnel
East of BNSF/14th/Movable Bridge
Elliott/Armory Way/14th/Tunnel
West of BNSF / 20th / Tunnel
Higher Performance Comparable Performance Lower Performance
43 4/17/2018
Affects Fishermen’s Avoids Dravus Terminal interchange
Fixed bridge supports more reliable service
= Key Findings
(Compared to ST3 Representative Project) Interbay/Ballard Key Level 1 findings – Elliott/15th/16th/Fixed Bridge 87
Interbay/Ballard Elliott/15th/16th/Fixed Bridge
Evaluation Measures
Fixed bridge potentially adds cost
Fixed bridge supports more reliable service
ST3 Representative Project (Baseline)
Elliott/15th / 16th / Fixed Bridge
West of BNSF / 20th / th 17 / Fixed Bridge Affects Fishermen’s
West of BNSF / 20th / Terminal 17th / Tunnel
East of Avoids Dravus BNSF/14th/Movable interchange Bridge
Elliott/Armory Way/14th/Tunnel
West of BNSF / 20th / Tunnel
Higher Performance Comparable Performance Lower Performance
44 4/17/2018
Longer Fixed bridge supports Long bridge span alignment Avoids Fishermen’s more reliable service over BNSF tracks; Terminal poor soils Proximity to historic district
Avoids Elliott and Construction and 15th Aves property displacement within Ballard core
= Key Findings
(Compared to ST3 Representative Project) Interbay/Ballard Key Level 1 findings – West of BNSF/20th/17th/Fixed Bridge 89
Interbay/Ballard West of BNSF/20th/17th/Fixed Bridge
Evaluation Measures
Fixed bridge potentially adds cost
Fixed bridge supports more reliable service
ST3 Representative Project (Baseline) Avoids Fishermen’s Terminal Elliott/15th / 16th / Fixed Bridge
West of BNSF / 20th / 17th / Fixed Bridge
West of BNSF / 20th / 17th / Tunnel
East of BNSF/14th/Movable Bridge Closer to Ballard Elliott/Armory historic core Way/14th/Tunnel
West of BNSF / 20th / Tunnel
Higher Performance Comparable Performance Lower Performance
45 4/17/2018
Avoids Fishermen’s Terminal Longer Tunnel supports more Long bridge span alignment reliable service; avoids over BNSF tracks; in-water construction poor soils
Avoids Elliott and 15th Aves
= Key Findings
(Compared to ST3 Representative Project) Interbay/Ballard Key Level 1 findings – West of BNSF/20th/17th/Tunnel 91
Interbay/Ballard West of BNSF/20th/17th/Tunnel
Evaluation Measures
Tunnel supports more reliable service
ST3 Representative Project (Baseline) Closer to Ballard historic core Elliott/15th / 16th / Fixed Bridge
West of BNSF / 20th / 17th / Fixed Bridge
West of BNSF / 20th / 17th / Tunnel
East of BNSF/14th/Movable th Bridge Avoids Elliott/15 , Tunnel potentially Fishermen’s Terminal adds cost Elliott/Armory Way/14th/Tunnel and Salmon Bay waterway West of BNSF / 20th / Tunnel
Higher Performance Comparable Performance Lower Performance
46 4/17/2018
Station near Terminal 91 but access constrained Avoids Fishermen’s from other areas At-grade Terminal alignment Water crossing permits required
Avoids Elliott and 15th Aves
Station within BINMIC Industrial area
= Key Findings
(Compared to ST3 Representative Project) Interbay/Ballard Key Level 1 findings – East of BNSF/14th/Movable Bridge 93
Interbay/Ballard East of BNSF/14th/Movable Bridge
Evaluation Measures
Stations within industrial areas
ST3 Representative Project (Baseline) Avoids Elliott Elliott/15th / 16th / th Fixed Bridge and 15 Ave
West of BNSF / 20th / 17th / Fixed Bridge
West of BNSF / 20th / 17th / Tunnel
East of BNSF/14th/Movable Bridge
Elliott/Armory Way/14th/Tunnel Station near Terminal 91 West of BNSF / 20th / Tunnel but access constrained from other areas Higher Performance Comparable Performance Lower Performance
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Constrained Avoids Fishermen’s construction areas Terminal
Tunnel supports more reliable service; avoids in-water construction
Avoids Elliott and 15th Aves Avoids Dravus and Nickerson interchanges
= Key Findings
(Compared to ST3 Representative Project) Interbay/Ballard Key Level 1 findings – Elliott/Armory Way/14th/Tunnel 95
Interbay/Ballard Elliott/Armory Way/14th/Tunnel
Evaluation Measures
Tunnel crossing supports more reliable service
ST3 Representative Project (Baseline)
Elliott/15th / 16th / Fixed Bridge
West of BNSF / 20th / 17th / Fixed Bridge Avoids Elliott/15th, West of BNSF / 20th / Fishermen’s Terminal th 17 / Tunnel and Salmon Bay East of waterway BNSF/14th/Movable Bridge
Elliott/Armory Way/14th/Tunnel
West of BNSF / 20th / Tunnel potentially Tunnel adds cost Stations within industrial areas Higher Performance Comparable Performance Lower Performance
48 4/17/2018
Avoids Fishermen’s Terminal Longer Tunnel supports more Long bridge span alignment reliable service; avoids over BNSF tracks; in-water construction poor soils
Construction and Avoids Elliott and displacement within 15th Aves Ballard core
= Key Findings
(Compared to ST3 Representative Project) Interbay/Ballard Key Level 1 findings – West of BNSF/20th/Tunnel 97
Interbay/Ballard West of BNSF/20th/Tunnel
Evaluation Measures
Tunnel crossing supports more reliable service
ST3 Representative Project (Baseline)
Elliott/15th / 16th / Tunnel potentially Fixed Bridge adds cost
West of BNSF / 20th / 17th / Fixed Bridge
West of BNSF / 20th / 17th / Tunnel Avoids Elliott/15th, East of BNSF/14th/Movable Fishermen’s Terminal Bridge and Salmon Bay Elliott/Armory waterway Way/14th/Tunnel
West of BNSF / 20th / Tunnel
Higher Performance Comparable Performance Lower Performance
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Interbay/Ballard summary ST3 Representative Project • Baseline for comparison • Avoids 15th Ave/Dravus interchange Elliott/15th/16th/Fixed Bridge • Supports more reliable service (no bridge openings) Alternatives with • Avoids Elliott Ave,15th Ave and Fishermen’s Terminal more potential West of BNSF/20th/17th/Fixed Bridge • Supports more reliable service • Avoids Elliott Ave,15th Ave and Fishermen’s Terminal East of BNSF/14th/Movable Bridge • Locates station on 14th Ave within industrial area • Avoids Elliott Ave, 15th Ave, Fishermen’s Terminal and Salmon Bay West of BNSF/20th/17th Tunnel • Requires tunnel; may require 3rd Party funding • Avoids Elliott Ave, 15th Ave, Fishermen’s Terminal and Salmon Bay Elliott/Armory Way/14th/Tunnel • Requires tunnel; may require 3rd Party funding
Alternatives with • Avoids Elliott Ave, 15th Ave, Fishermen’s Terminal and Salmon Bay greater West of BNSF/20th/Tunnel • Requires longer tunnel; may require 3rd Party funding challenges • Requires construction and displacement within Ballard core Tunnel through Queen Anne/Interbay • Depth and length impractical; would affect downtown tunnel depth Not practical Extensions to 65th, 85th, Northgate • Not included in ST3 plan suggestions Multi-modal Salmon Bay bridge • ST3 plan defined project as rail-only bridge Eliminate or add stations • Not consistent with ST3 plan
99
Interbay/Ballard Level 1 alternatives 100
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Next steps
Sample recommendation worksheet
Advance? Comments/ Discussion ST3 Representative Project • Avoids 15th Alternatives Ave/Dravus Elliott/15th/16th/Fixed with more interchange Bridge potential • Supports more reliable service
Alternative • Key findings
Alternatives Alternative • Key findings with greater challenges Alternative • Key findings
Not practical Alternative • Key findings suggestions Alternative • Key findings
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