Download - Purple Line Extension May 2014 presentation
-
8/12/2019 Purple Line Extension May 2014 presentation
1/46
Purple Line Extension
Section 1 Advisory Group Meeting May 27, 2014
-
8/12/2019 Purple Line Extension May 2014 presentation
2/46
Tonights Agenda
Project Update and Look-Ahead
Noise and Vibration Update Pre-Construction Surveys
Discussion
-
8/12/2019 Purple Line Extension May 2014 presentation
3/46
Advisory Group Role and Priorities
Key Role Communicating between Metro and those you represent
Key Interest : Understanding Construct ion
Impacts to you/your organization Traffic, dust, debris, noise Support/visibility/access for businesses during construction
Security around construction sites
Bus access near construction sites
Other Interests
Station and station-area appearance after construction Appropriate treatment of fossils
-
8/12/2019 Purple Line Extension May 2014 presentation
4/46
Project Update and Look-Ahead
-
8/12/2019 Purple Line Extension May 2014 presentation
5/46
Section 1 Update:
Activity in the Area
Wilshire Bus Rapid Transit Project(City of LA)
Private Developments(Desmond on Wilshire)
-
8/12/2019 Purple Line Extension May 2014 presentation
6/46
Project Update: Section 1
Funding
May 21: Awarded federal Full Funding
Grant Agreement (FFGA) for Section 1
$1.25 billion Full Funding GrantAgreement and $856 million TIFIA
loan
Const ruction Cont racting
January 2014: Proposals submitted from finalist Design-Builder
contractor teams Summer 2014: Award of Design-Build Contract
Summer/Fall 2014: Issue Notice to Proceed (NTP)
-
8/12/2019 Purple Line Extension May 2014 presentation
7/46
Section 1 Update: La Brea Station
Whats Happened So FarMetro Advanced Util it y Relocat ion (AUR) Work
Work Hours: Sunday-Friday, 8PM-6AM
Saturday, 8AM-6PM
Relocating electric and water lines Wilshire between S. Detroit St. and S. Orange Dr.
La Brea between 6th and 8th Streets
2013: Fiber-optic relocation substantially
complete
Typical cross-section of
underground utilities
All Metro/ Cit y of Los Angeles coordinat ion occurr ing per
exist ing Master Cooperat ive Agreement (MCA)
-
8/12/2019 Purple Line Extension May 2014 presentation
8/46
Section 1 Update: La Brea Station
Whats Next Ongoing: LADWP to complete
water and electrical connections
Ongoing: Business and
residential profiles for advanced
utility relocations
Community will continue to
receive work notices
E-mail Web
Social Media
Fliers
-
8/12/2019 Purple Line Extension May 2014 presentation
9/46
Section 1 Update: Fairfax Station
Whats Happened So FarExplorat ory Shaft : March 2014: excavation complete
April 2014: monitoring period began
Fossils preserved for Page Museum
Fiber-Opt ic Cable Relocat ion: March 2014: relocations began Work Hours:
Day work: Monday Friday: 9AM - 3:30PMSaturday: 8AM - 6PM
Night work: Sunday Thursday: 8PM - 6AM
Work anticipated to conclude 2nd Quarter 2016
Addit ional AUR Work: Contractor to start soon
Anticipate same work hours as La Brea
Business and residential profiles to be conducted
All Metro/ City of Los Angeles coordinat ionoccurr ing per exist ing Master Cooperat ive
Agreement (MCA)
-
8/12/2019 Purple Line Extension May 2014 presentation
10/46
Section 1 Update: La Cienega Station
Whats Happened So Far April 1: Beverly Hills City Council
conditionally approved 2 permit requests
for:
Well monitoring Fiber-optic relocation
May 18: Fiber work began on Wilshire
between Gale and San Vicente
Metro and City of Beverly Hills discussing
Memorandum of Agreement for utilityrelocation work
-
8/12/2019 Purple Line Extension May 2014 presentation
11/46
Section 1 Update: La Cienega Station
Whats Next
Wilshire/La Cienega conceptual entrance
Selection of AUR contractor and
start of utility relocations
AUR business and residential
profiles to be conducted ahead
of utility relocations
Completion of utility relocations
anticipated for 3rd Quarter 2016
-
8/12/2019 Purple Line Extension May 2014 presentation
12/46
Section 1 Update: Wilshire/Crenshaw Staging Site
Will be used throughout Section 1 utility
relocation and construction
Low-impact back-up alarms used on trucks
August 2013: Staging for Wilshire/La Brea AURbegan
January 2014: 20 sound fence installed around
SW corner
June 2014: Full sound fence to be installed
around entire yard Ongoing:
Noise awareness training
Maintenance inside and outside of yard
-
8/12/2019 Purple Line Extension May 2014 presentation
13/46
Noise and Vibration Update
-
8/12/2019 Purple Line Extension May 2014 presentation
14/46
Overview
Station construction review
Construction locations
Construction activity timeline
Construction activities:
Utility relocation
Demolition
Pile installation
Decking
Station excavation
Station construction Tunnel boring
Cross-passage construction
Material hauling and staging
Mitigation Training
Scheduling
Noise control measures
Monitoring Response
Environmental clearance
-
8/12/2019 Purple Line Extension May 2014 presentation
15/46
Station Construction Review
-
8/12/2019 Purple Line Extension May 2014 presentation
16/46
Construction Locations
Construction activities are concentrated at:
Station sites:
La Brea
Fairfax
La Cienega Retrieval shaft at Western Ave
Tunnels bored underground in-between
stations will have no surface noise impacts
Some surface work may be needed between
stations at cross-passage locations
Similar disruption to utility work
Design-Builder will determine how to do this
work
-
8/12/2019 Purple Line Extension May 2014 presentation
17/46
Construction Activity TimelineOptimal Schedule Without Restrictions
(Assumes extended work hours)
-
8/12/2019 Purple Line Extension May 2014 presentation
18/46
Activity:
Utility Relocation
Approved Work Hours:
8PM to 6AM: Sunday - Friday
8AM to 6PM: Saturdays as-needed (LA)
9AM to 6PM: Sundays as-needed (BH)
Typically occurs at night
Night-time work hours mandated and
approved by the cities of Los Angeles and
Beverly Hills
Noisiest activities include saw-cutting and
jack-hammering
Projected duration:
La Brea: (8 months remaining)
Fairfax: (23 months)
La Cienega: (28 months)
-
8/12/2019 Purple Line Extension May 2014 presentation
19/46
Activity: Demolition Proposed Work Hours:7AM to 5PM
Work completed during the day; no night
work
17 buildings slated for demolition
Western: 1 buildings
Crenshaw yard: 1 building
La Brea: 4 buildings
Fairfax: 6 buildings
La Cienega: 5 buildings
Noisiest activity is jack-hammering
Projected duration: Sporadically over 22
months (1 month/building)
-
8/12/2019 Purple Line Extension May 2014 presentation
20/46
Activity:
Pile Installation
Proposed Work Hours:
7AM to 11PM: 7 days a week
No overnight work, when possible
Piles are drilled not driven to reduce
noise
Noisiest activities include saw-cutting andpile-drilling
Projected duration:
Western: 2-3 months
La Brea: 6-8 months
Fairfax: 10-12 months
La Cienega: 6-8 months
-
8/12/2019 Purple Line Extension May 2014 presentation
21/46
Activity: DeckingProposed Work Hours:
Full weekend closures
8PM Friday - 6AM Monday
Work completed day and night on weekends
Noisiest activities include saw-cutting, jack-
hammering and large cranes during
operation
Materials delivery and hauling occurs at
night
Projected duration:
Western: 2 weekends
La Brea: 10 weekends
Fairfax: 11 weekends La Cienega: 11 weekends
-
8/12/2019 Purple Line Extension May 2014 presentation
22/46
Activity:
Station Excavation
Proposed Work Hours:
24 hours/7 days a week
Work primarily occurs underground
beneath concrete decking
Surface activities include:
Deliveries
Soil removal
Material delivery and hauling occurs at
night
Projected duration: La Brea: 10 months
Fairfax: 17 months
La Cienega: 20 months
-
8/12/2019 Purple Line Extension May 2014 presentation
23/46
Activity:
Station Construction
Proposed Work Hours:
24 hours/7 days a week
Station construction will be primarily
completed under the decking
Surface noise may be caused by:
Concrete pumping
Material delivery
Work will be completed during the
day, where possible
Projected duration:
La Brea: 61 months
Fairfax: 46 months
La Cienega: 44 months
-
8/12/2019 Purple Line Extension May 2014 presentation
24/46
Activity: Tunnel Boring
Tunnel boring underground
Not expected to generate surface noise
Noise may be caused at La Brea site only by:
Soil treatment plant operations Soil handling/hauling
Tunnel ventilation system
Projected duration: 33 months
Proposed Work Hours:
24 hours/7 days a week
-
8/12/2019 Purple Line Extension May 2014 presentation
25/46
Activity:
Cross-Passage Construction Cross-passages are small connectors linking both
tunnels
Up to 24 cross-passage locations would be built
Surface treatment may be required at cross-
passage locations If surface work is needed, noise and traffic
impacts may be caused at isolated locations by
drilling and pumping equipment
Projected duration: 24 months
(1 month/location)
Design-Build contractor to determine if this workwill be needed
Proposed Work Hours:
7AM to 11PM: 7 days a week
-
8/12/2019 Purple Line Extension May 2014 presentation
26/46
Activity:
Material Hauling/Staging
Proposed Work Hours:
9AM to 3:30PM: Monday to Friday
7PM to 6AM: Sunday to Thursday
TBD: Weekends
Work occurs during non-peak traffic
hours
Noisy activities may include lifting
and placing materials, excavating andhauling
Hauling must occur on major streets
at night
Truck staging sites to be identified
-
8/12/2019 Purple Line Extension May 2014 presentation
27/46
5-Step Noise Control Plan
1. Training
2. Scheduling of Noisy Activities3. Noise Control Measures
4. Monitoring
5. Response
-
8/12/2019 Purple Line Extension May 2014 presentation
28/46
Noise Control Plan:
1. Training Employees must take noise awareness training
Provided monthly
Emphasizes the importance of noise control
Discusses methods of limiting noise on the construction site:
No yelling
No idling of equipment
Avoid staging equipment in front of residences
Use noise control measures such as noise blankets, quiet equipment,
placing materials instead of dropping, etc.
-
8/12/2019 Purple Line Extension May 2014 presentation
29/46
Noise Control Plan:
2. Scheduling of Work Schedule noisiest activities during the
day or early evening hours when
possible. Examples:
Saw-cutting Pile-drilling
Jack-hammering
Traffic restrictions may require that
some of this work occurs at night
-
8/12/2019 Purple Line Extension May 2014 presentation
30/46
-
8/12/2019 Purple Line Extension May 2014 presentation
31/46
Noise Control Plan
3. Noise Control Measures (Contd)
Moveable noise barriers
-
8/12/2019 Purple Line Extension May 2014 presentation
32/46
Noise barrier fencing at
Crenshaw staging yard
Noise Control Plan:
3. Noise Control Measures (Contd)
Noise barrier fencing at
exploratory shaft
-
8/12/2019 Purple Line Extension May 2014 presentation
33/46
Solar-powered generators and light
stands (not engine powered)Noise control signage
Noise Control Plan
3. Noise Control Measures (Contd)
-
8/12/2019 Purple Line Extension May 2014 presentation
34/46
Slurry backfill (doesnt require vibratory
equipment)
Rubber pads beneath temporary
construction rails, where needed
Noise Control Plan
3. Noise Control Measures (Contd)
-
8/12/2019 Purple Line Extension May 2014 presentation
35/46
3 levels of monitoring:
Metro
Contractor
Environmental consultant Acoustical engineer interprets results,
prepares monthly compliance reports,
provides input/comments
City of Los Angeles: Police Commission
monitors work and fields complaints City of Beverly Hills: Will monitor work
Noise Control Plan
4. Noise Monitoring
-
8/12/2019 Purple Line Extension May 2014 presentation
36/46
Construction noise at night must be limited to no more than
5dB above the current ambient noise level
Pre-existing ambient noise levels have been determined:
By independent noise consultant and acoustical engineer
At locations monitored along alignment
Throughout a 24-hour period
Noise Control Plan
4. Noise Monitoring Allowable Noise Levels
-
8/12/2019 Purple Line Extension May 2014 presentation
37/46
Noise Control Plan:
5. Response 24-hour hotline and email
Contact information is provided to the
community via: All project materials
Signs
Website
Social media channels
E-mail
Hotline monitored: Urgent issues receive immediate response,
otherwise call is returned within 24 hours
-
8/12/2019 Purple Line Extension May 2014 presentation
38/46
Environmental Clearance
Purple Line Extension underwent full environmental
analysis and clearance as mandated by CEQA/NEPA
Chapter 4 of the EIS/EIR evaluates noise impacts The EIS/EIR identifies mitigation measures and commits
Metro to a mitigation monitoring program
Report is available for review at
www.metro.net/purplelineext
http://www.metro.net/purplelineexthttp://www.metro.net/purplelineext -
8/12/2019 Purple Line Extension May 2014 presentation
39/46
Conclusion
Type and amount of noise will varyby activity
Noise largely confined to: The three station locations; and ,
Retrieval shaft area
Many activities will occur belowground
When/where possible, activitieswill: Not be scheduled for overnight
hours Occur away from residences
Metro has techniques tominimize noise
Ongoing monitoring willensure compliance with
allowable levels Response plan in place to
swiftly address any issues thatmay arise
Impacts have been evaluatedin the EIS/EIR
-
8/12/2019 Purple Line Extension May 2014 presentation
40/46
Pre-Construction Survey (PCS)
-
8/12/2019 Purple Line Extension May 2014 presentation
41/46
Pre-Construction Survey: Overview
Standard practice for Metro construction projects
Documents conditions before construction beginsfor buildings that:
Front Wilshire along tunnel alignment
Are immediately adjacent to construction staging sites
Includes written report and photos
Shared with property owner
-
8/12/2019 Purple Line Extension May 2014 presentation
42/46
Pre-Construction Survey: Benefits
Copy provided to property owner
No cost to property owner for survey or report
Documents existing interior and exteriorbuilding conditions
Used by all parties in the event of a damageclaim
Information is confidential
-
8/12/2019 Purple Line Extension May 2014 presentation
43/46
Pre-Construction Survey: Process
Building walk-through includes: First floor interior rooms, offices and/or apartments
Basement and sub-surface parking
Exterior inspection
Inspector takes measurements and pictures
Building owner/representative and tenants maybe present
Furniture, wall hangings, etc. are usually notmoved
-
8/12/2019 Purple Line Extension May 2014 presentation
44/46
Pre-Construction Survey: Timing
First, properties around station areas and
retrieval shaft
Then, properties along Wilshire betweenstation areas
June 2014: Begin sending letters to property
owners around station areas and retrieval
shaft seeking permission to conduct survey
Late 2014: Surveys begin
-
8/12/2019 Purple Line Extension May 2014 presentation
45/46
Future Meeting Topic
Tree Removal and Replacement
Trees will need to be removed for the project
Metro will replace trees 2 for 1
Working with Wilshire Median Advisory Group
Will discuss in more detail at next Advisory Group meeting
-
8/12/2019 Purple Line Extension May 2014 presentation
46/46
Stay in Touch
metro.net/purplelineext
Infoline: 213.922.6934
Twitter.com/purplelineext
Facebook.com/purplelineext
mailto:[email protected]:[email protected]