SFOBB West Span BPM Path Feasibility and Environmental Public - - PowerPoint PPT Presentation

SFOBB West Span BPM Path

Feasibility and Environmental

Public Workshop

Pier 1 – Bayside Room January 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)
• Project Process, Funding, and Environmental
• San Francisco
• Main Span
• 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

Inspiring Approvable Affordable

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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

Downtown San 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

Pathway Options

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The Distance

Pathway Segments Length (miles) (mins) (mins)

BPM Pathway 2.9 17 57

SF Approach 0.5 Main Span (West) 2.0 YBI Approach and Path 0.4 Bay Bridge Trail 4.4 26 88 East Span 2.3 Approach 1.1 Emeryville(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

San Francisco Landing Options

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15 SFOBB West Span BPM Path

• 19 Alternatives  6 Alternatives
• Touchdown locations range from

Essex Street to The Embarcadero

• North and South bridge connections

Downtown SF Approaches

Where 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 study

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Essex Street

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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 study
• 1. Beale Street
• 2. Caltrans Paint Yard
• 3. 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 Options Cross-Sections

Stand-alone Attach to Existing On-deck

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

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 South

Do 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)
• Project Process and Environmental
• San Francisco
• Main Span
• 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)
• Project Process and Environmental
• San Francisco
• Main Span
• 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

SF Main Span YBI

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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

Thank you!