Westside Subway ExtensionCentury City Area Station OptionsOCTOBER 19, 2011
Westside Subway Extension  October 28, 2010 Board ActionOctober 28, 2010 - MTA Board approved the Draft EIS/EIR with stati...
Study and Analysis Century City AreaMetro conducted two studies  Tunnel Safety  Fault InvestigationFault Experts:    Met...
Study Area Alignments (LPA)                              4
Century City Station LocationsStation on Santa MonicaBoulevard shifted east to avoidactive Santa Monica Fault Zone        ...
Tunneling can be accomplished safely• Demonstrated on Gold Line Eastside Extension (2006)   Similar: diameter, oil field,...
Tunneling can be accomplished safely• Noise and vibration during tunneling and operations    Will be specified, monitored...
Safe Tunneling beneath Beverly Hills HighSchool• Many alignments evaluated, none can avoid all BHHS buildings   Selected ...
Fault Locations Westside Subway Study Area                                             9
Fault Zones Century City Area                                10
Santa Monica Boulevard and Constellation  OptionsSanta Monica Boulevard Fault zone extends sub-parallel to Santa  Monica ...
Conclusions• Santa Monica Boulevard    Fault zones at both proposed station sites    Neither site acceptable for station...
Independent Review Panel   Independent Review Panel:   Lloyd Cluff   Lucile Jones   Paul Jennings   Thomas O’Rourke       ...
Next Steps • Study reports: www.metro.net/westside • Late 2011/Early 2012: Final EIS/EIR distribution   for 45 day public ...
Upcoming SlideShare
Loading in …5
×

Century City Station Options - 11-19-11 Metro Board P&P Committee

1,374 views

Published on

Source: http://www.metro.net/projects_studies/westside/images/2011_1019_planning_committee.pdf

Published in: Business, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,374
On SlideShare
0
From Embeds
0
Number of Embeds
198
Actions
Shares
0
Downloads
5
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Century City Station Options - 11-19-11 Metro Board P&P Committee

  1. 1. Westside Subway ExtensionCentury City Area Station OptionsOCTOBER 19, 2011
  2. 2. Westside Subway Extension October 28, 2010 Board ActionOctober 28, 2010 - MTA Board approved the Draft EIS/EIR with station options at Century City, Westwood/UCLA and Westwood/VA Hospital stations.  Board approved Motion (Yaroslavsky) that during the Final EIS/EIR preparation, staff fully explore the risks associated with tunneling under the [Beverly Hills] High School, including but not limited to the following: risk of settlement, noise, vibration, risks from oil wells on the property, impact to use of the school as an emergency evacuation center, and overall risk to student faculty and community; and  Staff continue to work closely with the community and the City of Beverly Hills, and Century City and Westwood neighborhoods and provide them information from these analyses as soon as they become available.  Directed staff to analyze the possibility of moving the subway tunnel in order to avoid all school buildings and avoid any future plans to remodel Beverly Hills High School. 2
  3. 3. Study and Analysis Century City AreaMetro conducted two studies  Tunnel Safety  Fault InvestigationFault Experts: Metro’s Tunnel Advisory Panel: Independent Review Panel:James Dolan Ed Cording Lloyd CluffThomas Henyey Geoff Martin Lucile JonesThomas Rockwell Harvey Parker Paul Jennings Thomas O’Rourke 3
  4. 4. Study Area Alignments (LPA) 4
  5. 5. Century City Station LocationsStation on Santa MonicaBoulevard shifted east to avoidactive Santa Monica Fault Zone 5
  6. 6. Tunneling can be accomplished safely• Demonstrated on Gold Line Eastside Extension (2006)  Similar: diameter, oil field, gassy soil, seismic area, depth  Similar soils: dense and suitable for tunnel boring machine (TBM)• Pressurized closed-face TBM minimizes ground movement  Little to no ground settlement Little to no impact on buildings  Gas-and-water-tight final lining installed within TBM  Tunnel ventilation prevents gas buildup during tunneling and operations 6
  7. 7. Tunneling can be accomplished safely• Noise and vibration during tunneling and operations  Will be specified, monitored, and controlled to existing criteria  Substantiated complaints will be addressed and mitigated• Investigation of oil wells  Conducted investigation on BHHS Campus  Further investigation (magnetic probing) to confirm tunnel area clear of wells  Proven methods exist to treat oil well casings• Project requires tunneling through active faults  Many precedents for successful tunneling through active faults  Pressurized face TBMs can tunnel through fault zones safely  Installed lining will be designed to accept fault offsets without collapse 7
  8. 8. Safe Tunneling beneath Beverly Hills HighSchool• Many alignments evaluated, none can avoid all BHHS buildings  Selected best for BHHS  Passes only beneath South Wing of Building B  Not below gym/pool building• Depth allows future development (including deep basements and underground parking)• Presence of tunnels  Does not affect overlying structures during an earthquake  Does not impact use as emergency evacuation center or shelter  Will not pose new risks to students, faculty and community 8
  9. 9. Fault Locations Westside Subway Study Area 9
  10. 10. Fault Zones Century City Area 10
  11. 11. Santa Monica Boulevard and Constellation OptionsSanta Monica Boulevard Fault zone extends sub-parallel to Santa Monica Boulevard - area of complex faulting East station location is within West Beverly Hills Lineament/Newport Inglewood Fault zoneConstellation Boulevard Location is south and west of fault zones No evidence of faulting at station location 11
  12. 12. Conclusions• Santa Monica Boulevard  Fault zones at both proposed station sites  Neither site acceptable for station• Constellation Boulevard  No evidence of faulting at station location  Location is acceptable for station• Tunnels can be safely constructed under Beverly Hills, Beverly Hills High School, Century City, and Westwood 12
  13. 13. Independent Review Panel Independent Review Panel: Lloyd Cluff Lucile Jones Paul Jennings Thomas O’Rourke 13
  14. 14. Next Steps • Study reports: www.metro.net/westside • Late 2011/Early 2012: Final EIS/EIR distribution for 45 day public review period • Early 2012: Metro Board Project approval 14

×