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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