West Seattle and Ballard Link Extensions

Transcription

1 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

2 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

3 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 6 3

4 Alternatives development process Community engagement and collaboration 8 4

5 Alternatives development process LEVEL 1 Alternatives development LEVEL 2 Alternatives development LEVEL 3 Alternatives development Early-2018 Mid-2018 Late-2018 / Early-2019 Early-2019 PREFERRED ALTERNATIVE* Conduct early scoping Study ST3 representative project and alternatives Screen alternatives Technical analysis Refine and screen alternatives Refine and screen alternatives Conduct Environmental Impact Statement (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

6 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

7 Evaluation criteria Reliable service Travel times Regional connectivity Transit capacity ed transit demand Regional growth centers served ST Long-Range Plan consistency ST3 consistency Technical feasibility Financial sustainability Historically underserved populations Station area land use plan consistency Modal integration Station area development opportunities Environmental effects Traffic operations Economic effects (new) 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 14 7

8 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 Network integration and operational flexibility to meet future demand Transit capacity Passenger carrying capacity in downtown ed transit demand Ridership potential 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

9 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 Mode, route and general station locations per ST3 Potential operating plan effects Technical feasibility Engineering constraints Constructability issues Operational constraints Financial sustainability Qualitative capital cost comparison 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 18 9

10 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 consistency General station locations consistent with 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 Station area development opportunities Development potential 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 Protected natural resources Protected built and social environment Burden on historically underserved populations Traffic operations Traffic circulation and access Economic effects Freight movement and access on land and water Business and commerce effects 20 10

11 Level 1 alternatives evaluation West Seattle/ Duwamish Interbay/Ballard Downtown SODO Study segments 22 11

12 Avoids Dravus interchange Fixed bridge supports more reliable service Sample segment Key Level 1 findings Sample alternative = Key Findings (Compared to ) 23 Sample segment Evaluation Measures Sample alternative Fixed bridge supports more reliable service (Baseline) Elliott/15 th / 16 th / Fixed Bridge West of BNSF / 20 th / 17 th / Fixed Bridge West of BNSF / 20 th / 17 th / Tunnel East of BNSF/14th/Movable Bridge Elliott/Armory Way/14th/Tunnel Avoids Dravus interchange West of BNSF / 20 th / Tunnel Higher Performance Comparable Performance Lower Performance 12

13 Sample segment summary Alternatives with more potential Alternatives with greater challenges Elliott/15 th /16 th /Fixed Bridge Alternative Alternative Alternative Baseline for comparison Avoids 15 th Ave/Dravus interchange Supports more reliable service Key findings Key findings Key findings Not practical suggestions Alternative Alternative Key findings Key findings 25 Map of alternative Evaluation measures Segment summary Small Group Discussion 13

14 Intentionally blank Level 1 alternatives West Seattle/Duwamish 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

15 West Seattle/Duwamish Early scoping feedback 29 West Seattle/Duwamish Level 1 alternatives 30 15

16 Difficult design and construction at Pigeon Point Design and construction constraints through Duwamish Good coverage of rider sheds Neighborhood impacts Terminal station is constrained; difficult extension to south = Key Findings West Seattle/Duwamish Key Level 1 findings 31 West Seattle/Duwamish Evaluation Measures (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

17 Two tunnels and underground stations Avoids major Port areas 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 ) 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 (Baseline) Pigeon Ridge / West Seattle Tunnel West Seattle Bridge / Fauntleroy Good future extension to south Yancy Street / West Seattle Tunnel Oregon Street / Alaska Junction West Seattle Golf Course / Alaska Junction Duwamish crossingpossible Superfund site, in-water work, golf course edge Higher Performance Comparable Performance Lower Performance 17

18 Isolated station; near Port property Design and construction constraints through Port areas 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 ) 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 (Baseline) Pigeon Ridge / West Seattle Tunnel Avoids sensitive environmental areas in Pigeon Point and Longfellow Creek West Seattle Bridge / Fauntleroy Yancy Street / West Seattle Tunnel Oregon Street / Alaska Junction West Seattle Golf Course / Alaska Junction Delridge and Alaska Junction stations on periphery of land use centers Higher Performance Comparable Performance Lower Performance Affect Port and business operations 18

19 Lessens effects to neighborhoods but passes over Nucor Design and construction constraints through Port areas Long tunnel Avoids Pigeon Point Consolidates stations; less pop/emp served Improved transition to extend south in future = Key Findings (Compared to ST3 Representative ) West Seattle/Duwamish Key Level 1 findings Yancy Street/West Seattle Tunnel 37 West Seattle/Duwamish Yancy Street/ West Seattle Tunnel Evaluation Measures Consolidates stations; less pop/emp served (Baseline) Pigeon Ridge / West Seattle Tunnel West Seattle Bridge / Fauntleroy Fewer neighborhood impacts Yancy Street / West Seattle Tunnel Long tunnel; potential cost issues Oregon Street / Alaska Junction West Seattle Golf Course / Alaska Junction Doesn t directly serve Avalon and Delridge land use centers Higher Performance Comparable Performance Lower Performance Affects Port and business operations 19

20 Avoids Pigeon Point Design and construction constraints through Port areas Affects Oregon St and 44th Ave Avoids Fauntleroy and Alaska St Improved transition to extend south in future West Seattle/Duwamish = Key Findings (Compared to ST3 Representative ) Key Level 1 findings Oregon Street/Alaska Junction 39 West Seattle/Duwamish Oregon Street/ Alaska Junction Evaluation Measures Good transit integration at Alaska Junction Station (Baseline) Generally similar to Representative Pigeon Ridge / West Seattle Tunnel West Seattle Bridge / Fauntleroy Yancy Street / West Seattle Tunnel Affects Port and business operations, and also near California Oregon Street / Alaska Junction West Seattle Golf Course / Alaska Junction Higher Performance Comparable Performance Lower Performance Affects Oregon St and 44 th Ave 20

21 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 West Seattle/Duwamish = Key Findings (Compared to ST3 Representative ) 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 Eliminates station; less pop/emp served (Baseline) Pigeon Ridge / West Seattle Tunnel West Seattle Bridge / Fauntleroy Yancy Street / West Seattle Tunnel Oregon Street / Alaska Junction Golf course 4(f) resource; potential habitat impacts; some fewer residential impacts West Seattle Golf Course / Alaska Junction Higher Performance Comparable Performance Lower Performance 21

22 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: OR - 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; - The Administration determines that the use of the property will have a de minimis impact 43 Intentionally blank 22

23 West Seattle/Duwamish summary Baseline for comparison Alternatives with more potential Alternatives with greater challenges Not practical suggestions Oregon Street/Alaska Junction West Seattle Bridge/Fauntleroy Pigeon Ridge/West Seattle Tunnel Yancy Street/West Seattle Tunnel West Seattle Golf Course/Alaska Junction (Tunnel) Tunnel under Duwamish West Seattle Bridge Gondola, rail/bus bridge Extensions to Alki, Admiral, etc. Avoids Fauntleroy and Alaska; better orientation south Affects Oregon St and 44 th Ave Lessens effects to Junction and Delridge; better orientation south Creates isolated Delridge Station Lessens effects to Port, Junction, Delridge; better orientation south Requires two tunnels; may require 3 rd Party funding Lessens effects to Junction and Delridge; better orientation south Consolidates stations; potentially not consistent with ST3 Plan Requires tunnel; may require 3 rd Party funding Crosses golf course, Section 4(f) Lessens effects to Junction, Delridge Eliminates station; potentially not consistent with ST3 Plan Impractical tunnel depth and length Existing structure not built to accommodate LRT Constructability issues Mode not consistent with ST3 Plan Not included in ST3 Plan or long range plan 45 West Seattle/Duwamish Level 1 alternatives 46 23

24 Intentionally blank Level 1 alternatives SODO Massachusetts Tunnel Portal Surface E

25 SODO Early scoping feedback 49 SODO Level 1 alternatives 50 25

26 Limited area for construction phasing Temporary impact to Ryerson Base during construction Modifications to WSDOT ramps and potential impacts to planned S development Ground improvements required for elevated guideway and elevated SODO Station Temporary closure of Royal Brougham for cutand-cover construction Cut-and-cover construction potential impacts along 5 th Avenue S = Key Findings SODO Key Level 1 findings SODO Evaluation Measures (Baseline) Massachusetts Tunnel Portal Surface E-3 Higher Performance Comparable Performance Lower Performance 26

27 Avoids impact to Ryerson Base Grade separation at Holgate Avoids modifications to WSDOT ramps and potential impacts to S development Reduced need for ground improvements for elevated guideway More property required Longer tunnel; poor soils Reduces cut-and-cover construction on 5 th Ave in Chinatown/Int l District = Key Findings SODO (Compared to ) Key Level 1 findings Massachusetts Tunnel Portal 53 SODO Massachusetts Tunnel Portal Evaluation Measures (Baseline) Massachusetts Tunnel Portal Surface E-3 Higher Performance Comparable Performance Lower Performance Longer tunnel alignment; more property required Avoids potential effects to historic INS building; reduces cut-and-cover in Chinatown/Int l District Reduces potential effects to freight, traffic, and business during construction 27

28 Grade separation at Lander and Holgate Increased area available for construction; less service disruption Permanent impact to Ryerson Base Potential permanent closure of Royal Brougham Reduced need for ground improvements for elevated guideway At-grade SODO Station Stadium Station on both lines Avoids modifications to WSDOT ramps = Key Findings SODO (Compared to ) Key Level 1 findings Surface E-3 55 SODO Surface E-3 Evaluation Measures (Baseline) Massachusetts Tunnel Portal Surface E-3 Higher Performance Comparable Performance Lower Performance Improves light rail network reliability; two Stadium Stations provides greater regional connectivity Avoids modifications to WSDOT ramps; increased area available for construction; less service disruption Eliminates existing grade crossings at Lander and Holgate Streets 28

29 International District/Chinatown Station 57 International District/Chinatown Station 58 29

30 International District/Chinatown Station 59 Intentionally blank 30

31 SODO summary Alternatives with more potential Surface E-3 Massachusetts Portal Maintain buses on E-3 Baseline for comparison Less service disruption during construction Accommodates Stadium Station on both lines Eliminates existing grade crossings at Lander, Holgate; closes Royal Brougham Reduces cut-and-cover construction on 5 th Ave in Chinatown/Int l District Less service disruption during construction Eliminates existing grade crossing at Holgate Requires longer tunnel; more property; may require 3 rd Party funding Not practical due to ROW constraints Not practical suggestions First Ave alignment Design for potential extension south to Georgetown Alignment and stations locations not consistent with ST3 Not included in ST3 or long range plan 61 SODO Level 1 alternatives 62 31

32 Intentionally blank Level 1 alternatives Downtown Seattle 5th/Mercer 5th/Harrison 6th/Boren/Roy 8th/6th/Republican 5th/Roy/Consolidated SLU Station 64 32

33 Downtown Early scoping feedback 65 Downtown Level 1 alternatives 66 33

34 Tunnel portal in limited ROW Underground sewer conflict on Republican Street Tunnel construction through/under building tie-backs Station under SR 99 off-ramp = Key Findings Downtown Key Level 1 findings 67 Downtown Evaluation Measures (Baseline) 5 th /Harrison 5 th /Mercer 6 th /Boren/Roy 8 th /6 th /Republican 5 th /Roy/Consolidated SLU Station Higher Performance Comparable Performance Lower Performance 34

35 Station construction under existing Westlake Station Reduced underground sewer conflict Shorter alignment Downtown Key Level 1 findings 5th/Harrison = Key Findings (Compared to ) Decreased station area coverage; potentially move Denny Station south 69 Downtown 5 th /Harrison Generally comparable to ST3; off-setting pros/cons Construction under existing Westlake Station more challenging Evaluation Measures (Baseline) 5 th /Harrison 5 th /Mercer 6 th /Boren/Roy 8 th /6 th /Republican 5 th /Roy/Consolidated SLU Station Higher Performance Comparable Performance Lower Performance 35

36 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 Downtown Key Level 1 findings 5th/Mercer = Key Findings (Compared to ) Increased station area coverage Longer alignment 71 Downtown 5 th /Mercer Evaluation Measures Larger underground sewer conflict on Mercer Street; construction under existing Westlake Station (Baseline) Tunnel portal on steep slope, park property 5 th /Harrison 5 th /Mercer 6 th /Boren/Roy 8 th /6 th /Republican 5 th /Roy/Consolidated SLU Station Potential effects to traffic and freight on Mercer during construction Higher Performance Comparable Performance Lower Performance 36

37 Tunnel portal near steep slope and in park property Reduced underground sewer conflict Tunnel construction under/adjacent to I-5 walls; avoids tiebacks on 5 th Ave = Key Findings Downtown Key Level 1 findings 6th/Boren/Roy (Compared to ) Increased station area coverage Longer alignment 73 Downtown 6 th /Boren/Roy Evaluation Measures Avoids underground sewer conflicts (Baseline) 5 th /Harrison 5 th /Mercer Seattle Center Station on edge of Uptown urban center; degraded ped/bike access 6 th /Boren/Roy 8 th /6 th /Republican 5 th /Roy/Consolidated SLU Station Tunnel portal on steep slope, park property Higher Performance Comparable Performance Lower Performance 37

38 Longer alignment, deeper station Construction risk of tunneling under I-5 at two locations Location of Midtown Station not consistent with ST3 plan = Key Findings (Compared to ) Downtown Key Level 1 findings 8th/6th/Republican 75 Downtown 8 th /6 th /Republican Evaluation Measures Midtown Station location not consistent with ST3 plan (Baseline) 5 th /Harrison Longer alignment; construction under I-5; deeper Midtown Station 5 th /Mercer 6 th /Boren/Roy 8 th /6 th /Republican 5 th /Roy/Consolidated SLU Station Higher Performance Comparable Performance Lower Performance Longer walk/bike distance to commercial core 38

39 Tunnel portal near steep slope and in park property Station construction under existing Westlake Station Reduced underground sewer conflict = Key Findings (Compared to ) Number of stations not consistent with ST3 plan Downtown Key Level 1 findings 5 th /Roy/Consolidated SLU Station Longer alignment 77 Downtown 5 th /Roy/Consolidated SLU Station Consolidated station reduces constructability issues Evaluation Measures Number of stations not consistent with ST3 plan (Baseline) 5 th /Harrison 5 th /Mercer Seattle Center Station on edge of Uptown urban center; degraded ped/bike access 6 th /Boren/Roy 8 th /6 th /Republican Tunnel portal on steep slope, park property 5 th /Roy/Consolidated SLU Station Higher Performance Comparable Performance Lower Performance Reduced traffic impacts during construction 39

40 Downtown summary Baseline for comparison Alternatives with more potential Alternatives with greater challenges Not practical suggestions 5th/Harrison 6 th /Boren/Roy 5 th /Mercer 5 th /Roy/Consolidated SLU Station 8 th /6 th /Republican (First Hill) Use Downtown Seattle Transit Tunnel (DSTT) Design for potential extensions to north and/or east Avoids utility conflicts on Republican and station under SR 99 off-ramp Decreased station coverage; potentially move Denny Station south Avoids utility conflicts on Republican and station under SR 99 off-ramp Increases construction risk due to I-5 walls along 6 th Ave; avoids tiebacks on 5 th Ave Avoids utility conflicts on Republican and station under SR 99 off-ramp Increases construction risk due to large sewer on Mercer Avoids utility conflicts on Republican and station under SR 99 off-ramp Consolidates stations; potentially not consistent with ST3 Increases construction risk due to two crossings under I-5 First Hill station not consistent with ST3 Existing DSTT capacity constraints Extensions to north and/or east not included in ST3 or long range plan 79 Downtown Level 1 alternatives 80 40

41 Intentionally blank Level 1 alternatives Interbay/Ballard 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

42 Interbay/Ballard Early scoping feedback 83 Interbay/Ballard Level 1 alternatives 84 42

43 Affects traffic on Elliott and 15th Affects Fishermen s Terminal Proximity to existing bridge; constructability issues Fully grade separated alignment Affects property in station area Affects service reliability due to movable bridge Water crossing permits required = Key Findings Interbay/Ballard Key Level 1 findings 85 Interbay/Ballard Evaluation Measures (Baseline) Elliott/15 th / 16 th / Fixed Bridge West of BNSF / 20 th / 17 th / Fixed Bridge West of BNSF / 20 th / 17 th / Tunnel East of BNSF/14th/Movable Bridge Elliott/Armory Way/14th/Tunnel West of BNSF / 20 th / Tunnel Higher Performance Comparable Performance Lower Performance 43

44 Avoids Dravus interchange Affects Fishermen s Terminal Fixed bridge supports more reliable service = Key Findings Interbay/Ballard Key Level 1 findings Elliott/15th/16th/Fixed Bridge (Compared to ) 87 Interbay/Ballard Evaluation Measures Elliott/15 th /16 th /Fixed Bridge Fixed bridge potentially adds cost Fixed bridge supports more reliable service (Baseline) Elliott/15 th / 16 th / Fixed Bridge West of BNSF / 20 th / 17 th / Fixed Bridge West of BNSF / 20 th / 17 th / Tunnel Affects Fishermen s Terminal Avoids Dravus interchange East of BNSF/14th/Movable Bridge Elliott/Armory Way/14th/Tunnel West of BNSF / 20 th / Tunnel Higher Performance Comparable Performance Lower Performance 44

45 Long bridge span over BNSF tracks; poor soils Longer alignment Avoids Fishermen s Terminal Fixed bridge supports more reliable service Proximity to historic district Avoids Elliott and 15 th Aves Construction and property displacement within Ballard core = Key Findings Interbay/Ballard Key Level 1 findings West of BNSF/20th/17th/Fixed Bridge (Compared to ) 89 Interbay/Ballard West of BNSF/20 th /17 th /Fixed Bridge Evaluation Measures Fixed bridge potentially adds cost Fixed bridge supports more reliable service (Baseline) Elliott/15 th / 16 th / Fixed Bridge Avoids Fishermen s Terminal West of BNSF / 20 th / 17 th / Fixed Bridge West of BNSF / 20 th / 17 th / Tunnel East of BNSF/14th/Movable Bridge Elliott/Armory Way/14th/Tunnel Closer to Ballard historic core West of BNSF / 20 th / Tunnel Higher Performance Comparable Performance Lower Performance 45

46 Long bridge span over BNSF tracks; poor soils Longer alignment Avoids Fishermen s Terminal Tunnel supports more reliable service; avoids in-water construction Avoids Elliott and 15 th Aves = Key Findings Interbay/Ballard Key Level 1 findings West of BNSF/20th/17th/Tunnel (Compared to ) 91 Interbay/Ballard West of BNSF/20 th /17 th /Tunnel Evaluation Measures Tunnel supports more reliable service (Baseline) Elliott/15 th / 16 th / Fixed Bridge Closer to Ballard historic core West of BNSF / 20 th / 17 th / Fixed Bridge West of BNSF / 20 th / 17 th / Tunnel Tunnel potentially adds cost East of BNSF/14th/Movable Bridge Elliott/Armory Way/14th/Tunnel West of BNSF / 20 th / Tunnel Avoids Elliott/15 th, Fishermen s Terminal and Salmon Bay waterway Higher Performance Comparable Performance Lower Performance 46

47 Station near Terminal 91 but access constrained from other areas At-grade alignment Avoids Fishermen s Terminal Water crossing permits required Avoids Elliott and 15 th Aves Station within BINMIC Industrial area = Key Findings Interbay/Ballard Key Level 1 findings East of BNSF/14th/Movable Bridge (Compared to ) 93 Interbay/Ballard East of BNSF/14th/Movable Bridge Evaluation Measures Stations within industrial areas (Baseline) Elliott/15 th / 16 th / Fixed Bridge Avoids Elliott and 15 th Ave West of BNSF / 20 th / 17 th / Fixed Bridge West of BNSF / 20 th / 17 th / Tunnel East of BNSF/14th/Movable Bridge Elliott/Armory Way/14th/Tunnel West of BNSF / 20 th / Tunnel Higher Performance Comparable Performance Lower Performance Station near Terminal 91 but access constrained from other areas 47

48 Constrained construction areas Avoids Fishermen s Terminal Tunnel supports more reliable service; avoids in-water construction Avoids Elliott and 15 th Aves Avoids Dravus and Nickerson interchanges = Key Findings Interbay/Ballard Key Level 1 findings Elliott/Armory Way/14th/Tunnel (Compared to ) 95 Interbay/Ballard Elliott/Armory Way/14 th /Tunnel Evaluation Measures Tunnel crossing supports more reliable service (Baseline) Elliott/15 th / 16 th / Fixed Bridge West of BNSF / 20 th / 17 th / Fixed Bridge West of BNSF / 20 th / 17 th / Tunnel East of BNSF/14th/Movable Bridge Avoids Elliott/15 th, Fishermen s Terminal and Salmon Bay waterway Elliott/Armory Way/14th/Tunnel Tunnel potentially adds cost West of BNSF / 20 th / Tunnel Higher Performance Comparable Performance Lower Performance Stations within industrial areas 48

49 Long bridge span over BNSF tracks; poor soils Longer alignment Avoids Fishermen s Terminal Tunnel supports more reliable service; avoids in-water construction Avoids Elliott and 15 th Aves Construction and displacement within Ballard core = Key Findings Interbay/Ballard Key Level 1 findings West of BNSF/20th/Tunnel (Compared to ) 97 Interbay/Ballard Evaluation Measures West of BNSF/20 th /Tunnel Tunnel crossing supports more reliable service (Baseline) Elliott/15 th / 16 th / Fixed Bridge Tunnel potentially adds cost West of BNSF / 20 th / 17 th / Fixed Bridge West of BNSF / 20 th / 17 th / Tunnel East of BNSF/14th/Movable Bridge Elliott/Armory Way/14th/Tunnel Avoids Elliott/15 th, Fishermen s Terminal and Salmon Bay waterway West of BNSF / 20 th / Tunnel Higher Performance Comparable Performance Lower Performance 49

50 Interbay/Ballard summary Alternatives with more potential Alternatives with greater challenges Not practical suggestions Elliott/15 th /16 th /Fixed Bridge West of BNSF/20 th /17 th /Fixed Bridge East of BNSF/14 th /Movable Bridge West of BNSF/20 th /17 th Tunnel Elliott/Armory Way/14 th /Tunnel West of BNSF/20 th /Tunnel Tunnel through Queen Anne/Interbay Extensions to 65 th, 85 th, Northgate Multi-modal Salmon Bay bridge Eliminate or add stations Baseline for comparison Avoids 15 th Ave/Dravus interchange Supports more reliable service (no bridge openings) Avoids Elliott Ave,15th Ave and Fishermen s Terminal Supports more reliable service Avoids Elliott Ave,15 th Ave and Fishermen s Terminal Locates station on 14 th Ave within industrial area Avoids Elliott Ave, 15th Ave, Fishermen s Terminal and Salmon Bay Requires tunnel; may require 3 rd Party funding Avoids Elliott Ave, 15th Ave, Fishermen s Terminal and Salmon Bay Requires tunnel; may require 3 rd Party funding Avoids Elliott Ave, 15th Ave, Fishermen s Terminal and Salmon Bay Requires longer tunnel; may require 3 rd Party funding Requires construction and displacement within Ballard core Depth and length impractical; would affect downtown tunnel depth Not included in ST3 plan ST3 plan defined project as rail-only bridge Not consistent with ST3 plan 99 Interbay/Ballard Level 1 alternatives

51 Next steps Sample recommendation worksheet Alternatives with more potential Alternatives with greater challenges Elliott/15 th /16 th /Fixed Bridge Alternative Alternative Alternative Avoids 15 th Ave/Dravus interchange Supports more reliable service Key findings Key findings Key findings Advance? Comments/ Discussion Not practical suggestions Alternative Alternative Key findings Key findings

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