TREASURE ISLAND AND YERBA BUENA ISLANDTreasure Island Development AuthorityInfrastructure and Transportation CommitteeFebruary 24, 2015

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | MAJOR PHASE 1 SCHEDULE

MAJOR PHASE 1 SCHEDULE 1.6.15: TI/YBI CAB Parks Review – City Side Park, Eastside Commons, Hilltop Park, Cultural Park 1.12.15: Arts Commission Review – Ferry Shelter and Plaza 1.14.15: TIDA Board Parks Review – Cityside Park, Eastside Commons, Hilltop Park, Cultural Park 1.27.15: TIDA ITC Review 1 – Ferry Plaza + Shelter, Bldg 1 Plaza, Marina Plaza, Retail Street, Bldg 2+3

Plazas, Clipper Cove 1.30.15: TIDA Major Phase 1 Draft Pre-Submission Review 2.3.15: TI/YBI CAB Parks Review – Ferry Plaza + Shelter, Bldg 1 Plaza, Marina Plaza, Retail Street,

Bldg 2+3 Plazas, Clipper Cove 2.10.15: TIDA Board Review - Ferry Plaza + Shelter, Bldg 1 Plaza, Marina Plaza, Retail Street, Bldg 2+3

Plazas, Clipper Cove 2.24.15: TIDA ITC Review 2 – Feedback on Island Core Presentation, Introduction to MP1 Application,

Geotechnical Mitigations in MP 1, and Sea Level Rise (SLR) Mitigations & Shoreline Improvements in MP 1 3.3.15: TI/YBI CAB Review – Intro to MP1 Application, MP 1 Geotechnical Mitigations & SLR Mitigations &

Shoreline Improvements in MP1 3.11.15: TIDA Board Review – Intro to MP1 Application, MP 1 Geotechnical Mitigations & SLR Mitigations &

Shoreline Improvements in MP1 3.24.15: TIDA ITC Review 3 – MP1 Application – Topic TBD 4.7.15: TI/YBI CAB Review - MP1 Application Approval 4.28.15: TIDA ITC Review 4 – MP1 Application Approval 5.13.15: TIDA Board Review - MP1 Application Approval

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | AGENDA

MAJOR PHASE 1 APPLICATION OVERVIEW (TICD) – 10 min.1. Phasing 2. MP1 Application Table of Contents Overview

GEOTECHICAL IMPROVEMENTS IN MAJOR PHASE 1 (ENGEO) – 30 min.1. Existing Geotechnical Conditions 2. Geotechnical Mitigations

SEA LEVEL RISE MITIGATIONS AND SHORELINE IMPROVEMENTS IN MAJOR PHASE 1 (Moffatt & Nichol) – 30 min.

1. Sea Level Rise Overview2. Shoreline Improvements Overview

STREET DESIGN UPDATES (CMG) – 20 min.1. Parking Quantity Update2. Parking Process/Integrated Parking Plan Update3. Traffic Volumes Update

AGENDA

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | MAJOR PHASE 1 APPLICATION

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | PHASING – MAJOR PHASE

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | PHASING – MAJOR PHASE 1 SUB-PHASES

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | MAJOR PHASE 1 APPLICATION - CONTENTS

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | GEOTECHNICAL MITIGATION IN MAJOR PHASE 1

GEOTECHNICAL MITIGATION FOR TREASURE ISLAND MAJOR PHASE 1

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | TREASURE ISLAND CONSTRUCTION

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 |

• Late 1930s• Perimeter Dikes• Hydraulic Fill• Settlement

TREASURE ISLAND CONSTRUCTION

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | TREASURE ISLAND CONSTRUCTION

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | EXISTING CONDITIONS

800 Residential UnitsCommercial Leasing Program Recreational Uses

Job Corps Campus (Department of Labor)Coast Guard Facility

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | GEOTECHNICAL BORINGS & 6CPTS

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | SUBSURFACE CONDITIONS

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | SUMMARY OF HISTORIC SETTLEMENT

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | EXISTING TOPOGRAPHY

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | GEOTECHNICAL CONCERNS & MITI1G0ATIONS

MITIGATION MEASURES

• Liquefaction

• Lateral Spreading

• Seismic settlement

• Seismic Slope Deformation

• Kinematic loads on offshore structures

• Static settlement under new loads

CONCERNS

• Stone columns and setbacks

• Deep Soil Mix (DSM) buttresses

• Sheet pile or DSM soldier pile walls

• Vibro-compaction

• Lateral design of offshore piles

• Surcharging with wick drains

MITIGATION MEASURES

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | GEOTECHNICAL MITIGATION PLANS

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 |

Penetration Compaction and Withdrawal

VIBRO-COMPACTION

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | VIBRO-REPLACEMENT

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | DIRECT POWER COMPACTION

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | DEEP SOIL MIXING

Soil-Cement Columns (SCC)

Trench-cutting Re-mixing Deep Wall Method(TRD)

Advancing Machine

Cutter Post

Excavating & Mixing

Solidifying Slurry

Soil Mixed Wall

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 |

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 |

SEA LEVEL RISE MITIGATIONS AND SHORELINE IMPROVEMENTS IN

MAJOR PHASE 1

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 |

Tidal Range

0’

6’

Average 12’ – 14’

9.1’ (existing SWL)

Range of Possible Sea Level Rise Values over 100 years

Wave Runup

Coastal FloodingZone V or A

Design Life, Risk and Consequence• Seismic/Tsunami: Low Probability of Occurrence – significant consequences• SLR: High Probability of Occurrence – low immediate risk

-- One Solution - Adaptive Management linked to Monitoring Strategy --

EXISTING CONDITIONS IN SF BAY

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 |

West Coast1

Storm WavesSteric Sea LevelSea Level AnomaliesStorm Surge

20101 21001

± 0.3m+ 0.5m

? (1-2m) ~4 m

Tides ~2 m

Tide Waves Surge SLR (2060) SLR (2100) Tide Waves Surge SLR (2060) SLR (2100)

West Coast

East Coast

Source: Guza, R., Sea Level Rise Presentation, Scripps Institute of Oceanography, Oct 28, 2011

Comparison ‐West Coast vs. East Coast of US

RANGE OF WATER LEVELS

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | RATES OF SEA LEVEL RISE

-10

0

10

20

30

40

50

60

70

80

90

1990 2000 2010 2020 2030 2040 2050 2060 2070 2080 2090 2100 2110

Incr

ease

from

200

0 le

vel (

inch

es)

Year

Specified

IPCC AR4 High Ranges, All Scenarios

IPCC AR4 Low Ranges, All Scenarios

Rahmstorf High w/Statistical Uncertainty

Rahmstorf Best-Fit High

Rahmstorf Best-Fit Low

Rahmstorf Low w/Statistical Uncertainty

CCCC Scenarios with No Dam Corrections

CCCC Scenarios Corrected for Dams

Historic Trend (No Acceleration)

Satellite Altimetry Data/Projection

Note: Curve shapes are approximate

IPCC 2013

NRC 2013

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 |

-10

0

10

20

30

40

50

60

70

80

90

1990 2000 2010 2020 2030 2040 2050 2060 2070 2080 2090 2100 2110

Incr

ease

from

200

0 le

vel (

inch

es)

Year

For TI ‐ 3 Feet Over 70 years Selected

ACCEPTABLE LEVEL OF RISK

PLANNING HORIZON

RISK

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | SEA LEVEL RISE PROJECTIONS

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | SLOPE PROTECTION - PRESENT

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | RAISE EMBANKMENTS - PRESENT

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | RAISE EMBANKMENTS - FUTURE

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | RAISE EMBANKMENTS - FUTURE

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | CITYSIDE PARK SECTIONS

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | NORTHERN SHORELINE SECTIONS

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | NORTHERN PARK ADAPTIVE MANAGEMENT

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | CLIPPER COVE SECTIONS

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 |

STREET DESIGN UPDATE

STREET DESIGN UPDATE

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | PARKING

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | STREET PARKING – D4D AND STREETSCAPE MP

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | STREET PARKING – CURB CUTS

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | STREET PARKING – REMAINING

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | SPORTS FIELD + FARM PARKING

350

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | ADDITIONAL PARK PARKING

350

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | STREET PARKING – RETAIL CORE

ON –STREET

PARKING SPACES

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | STREET PARKING + LOTS : ISLAND CORE

180

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | FUTURE GARAGES – ISLAND CORE

180760

760

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 |

180

INTERIM SURFACE PARKING OPTIONS

350

175 255

125

45

300

270

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | STREET PARKING – CITYSIDE NEIGHBORHOOD

ON – STREET PARKING SPACES

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | STREET PARKING – EASTSIDE NEIGHBORHOOD

ON – STREET PARKING SPACES

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | TOTAL BUILD-OUT POTENTIAL PARKING

POSSIBLE PARKING SPACESCORE + NEIGHBORHOODS

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | EVENT + ACTIVITIES PARKING MOVEMENT

EVENTS + ACTIVITIES

TREASURE ISLAND | TIDA ITC Review Meeting | February 24, 2015 | TOTAL MAJOR PH 1 POTENTIAL PARKING

MAJOR PHASE 1 PARKING

3,481 MAX. HOUSEHOLDSMAJOR PHASE 1