sfobb west span bpm path public workshop
TRANSCRIPT
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SFOBB West Span BPM PathFeasibility and Environmental Public Workshop
Pier 1 – Bayside RoomJanuary 20, 2016
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Welcome!
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Workshop Agenda
• Arrival (6:00)• Presentation (6:10-6:45)• General Q&A (6:45-7:00)• Feedback Stations (7:00-7:40)
o Project Process, Funding, and Environmentalo San Franciscoo Main Spano Yerba Buena Island (YBI)
• Station Reports (7:40-7:45)• Adjourn (7:45)
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Previous Studies
• Feasibility Study (2002) PSR-PDS (2014)
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Project Goals
• Downtown San Francisco bicycle & pedestrian link to East Bay & Treasure Island
• Facilitate and not hinder Caltrans maintenance access • Buildable and fundable alternative
InspiringApprovableAffordable
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• San Francisco touchdown ~2500 feet or ½ mile• Main Span 10,000 feet or ~ 2 miles• YBI touchdown and path ~ ½ mile
Profile to follow
Project Description
DowntownSan Francisco Main Span
Yerba Buena Island
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Project Benefits
• Transportation link from East Bay and Treasure Island to/from San Francisco.
• Connects to East Span Pathway (Bay Bridge Trail)• Tourism, health and recreation• Closure link for the Bay Trail• Class 1 - Protected from vehicular traffic • Accessible (ADA) – 5% or less continuous or 12H:1V
w/landings
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Workshop Goals
• Project information and process• Feedback on initial alternatives• How will you use the path?• Where should the path connect?• Features and Amenities• Suggestions or Concerns
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Pathway Options
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The Distance
Pathway SegmentsLength(miles) (mins) (mins)
BPM Pathway 2.9 17 57SF Approach 0.5Main Span (West) 2.0YBI Approach and Path 0.4
Bay Bridge Trail 4.4 26 88East Span 2.3Approach 1.1Emeryville(Shellmound) 1.0
Total Bay Bridge Trail & Pathway 7.3 44 145
• How far and how long?
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Pathway Section
Ohlone Greenway: El Cerrito
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Pathway Width
East Span 15½’ Golden Gate:10’ max
Tilikum Crossing 2 x 14’ Brooklyn 8’ to 16’
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Amenities
• Benches• Look Out• Lighting• Safety/ Call Boxes• Wayfinding• Interpretive Displays
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San Francisco Landing Options
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• 19 Alternatives 6 Alternatives
• Touchdown locations range from Essex Street to The Embarcadero
• North and South bridge connections
Downtown SF ApproachesWhere should the path connect in San Francisco?
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Downtown SF North Approaches
SFOBB West Span BPM Path
• 3 Alternatives considered for further study1. Essex Street 2. Caltrans Paint Yard 3. The Embarcadero
1
2 3
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Downtown SF South Approaches
SFOBB West Span BPM Path
• 3 Alternatives considered for further study1. Beale Street2. Caltrans Paint Yard3. The Embarcadero
1 2 3
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Elevator Option • At Pier W1 – touchdown just
west of Embarcadero
• Elevator Only Option – no ramps
• Dual High Speed – high capacity
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Essex Street Landing
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Paint Yard Landing
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Embarcadero Landing
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San Francisco Path OptionsCross-Sections
Stand-alone
Attach to Existing
On-deck
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Yerba Buena Island Options
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YBI Options
SFOBB West Span BPM Path
• Interface with ongoing projects
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YBI Options
SFOBB West Span BPM Path
• 6 major options
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YBI - East Bike/Ped Vista Point• Connection from East Span Trail• Vista Point w/bathrooms, water, bike racks, signage/info
SFOBB West Span BPM Path
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YBI – Below Hillcrest-1 • Cut or retained fill with some structures• Interference with Cost Guard Access
Retained Wall - Fill
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YBI – Below Hillcrest-2• Cut or retained fill with some structures• Steep terrain and slopes
Typical Viaduct
Retained Wall - Fill
Retained Wall - Cut
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YBI – Above Hillcrest – N/S• Cut or retained fill above Hillcrest (to inside)• North option – use of west side ramps
SFOBB West Span BPM Path
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YBI – Suspended & Tunnel Options
SFOBB West Span BPM Path
• Tie-in to Main Span Suspended Option• Option to continue through crown of existing tunnel
Suspended Path at West Portal
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Main Span Options
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Main Span Alignments• North or South Options; similar alignments
• Suspended Elevated Deck Option
• Structural and architectural alternatives
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North or SouthDo you prefer the path on the north or south side of the bridge?
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Propped Cantilever Options
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Cantilever Beam w/Moment Connection
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Pinned Boomerang Deck
Extended Alternate
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Outboard Deck w/Existing Suspension Cable
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Deck Uplift w/stay cables
Tamar Bridge Path Addition
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Suspended Elevated Deck
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Suspended Elevated Deck
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Project Timeline• Funding required to advance design and construction
Public Workshops
Current BPM Project Future Phases (Est. 8‐10 Years)2015 2016
Alternatives Screening
Conceptual Design
Preliminary Design
Environmental Studies
Final Design (PS&E)
Funding/Procurement
Construction
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Agenda – Q&A
• Arrival (6:00)• Presentation (6:10-6:45)• General Q&A (6:45-7:00)• Feedback Stations (7:00-7:40)
o Project Process and Environmentalo San Franciscoo Main Spano Yerba Buena Island (YBI)
• Station Reports (7:40-7:45)• Adjourn (7:45)
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Breakout Stations
• Arrival (6:00)• Presentation (6:10-6:45)• General Q&A (6:45-7:00)• Feedback Stations (7:00-7:40)
o Project Process and Environmentalo San Franciscoo Main Spano Yerba Buena Island (YBI)
• Station Reports (7:40-7:45)• Adjourn (7:45)
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Summary of Breakouts
• Project Overview and Planning• San Francisco Touchdown• Main Span• Yerba Buena Island
SFMain SpanYBI
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Next Steps
• Evaluate Feedback – inform design process• Conceptual design and initial cost estimates• 2nd Workshop – Fall 2016• Complete Environmental Studies• Final Design• Funding• Construction
SFOBB West Span BPM Path
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Thank you!