2nd Construction Meeting
March 9th, 2015
Boston English High School
144 McBride Street, Jamaica Plain
Agenda
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Welcome
Team introductions
Review of completed work to date
The next 90 days of work
Responses to questions from 1st meeting
• Environmental
• Traffic
• Ongoing public involvement
• Q&A
Work Completed To Date
and
The Next 90 Days
Work Completed to Date - I
Work Completed to Date – 1: Description
• The previous slide showed a photograph of tree
removal and tree protection needed to construct
the temporary roadway.
• The temporary roadway will be used as a
replacement to carry traffic while the Casey
Overpass is being demolished.
• Once the final roadway configuration is
constructed, traffic will be shifted off of the
temporary roadway and onto the permanent
boulevard.
• New trees will be planted to replace those lost
for the temporary road.
Work Completed to Date - II
Work Completed to Date – II: Description
• The previous slide showed the
placement of construction signage.
• Construction signage has been place to
help pedestrians, cyclist, and motorist
better traverse through the project site
while construction is ongoing.
• Although covered by snow, the previous
slide also showed the placement of
erosion control.
Work Completed to Date - III
Work Completed to Date – III: Description
• The previous slide showed an excavator
digging a hole as a preparatory step for
the temporary lanes at Hyde Park
Avenue and New Washington Street.
• In the center of the image, a state
trooper directs traffic through the work
zone.
Work Completed to Date - IV
Other Work Completed
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Baseline video of adjacent properties
Utility relocations (ongoing)
Drain cleaning
Installation of advisory VMS boards
BPS & METCO buses to construction
pick-up/drop-off site
• Snow removal
The Next 90 Day - Overview
• From NTP to Milestone 3
• Initial demolition of bridge begins during next 90 days
• Casey Overpass anticipated to close by the end of May, 2015
• Major Steps Along the Way:
• Construct eastbound & westbound temporary
surface roadways (underway)
• Build temporary Route 39 bus berth
The Next 90 Days - Schedule of Activities
The Next 90 Days – Schedule of Activities:
Description
• The previous slide showed a schedule of
activities for the next 90 days.
• Some of the major activities include:
• Relocating existing utilities and fire hydrants
constructing the temporary roadways
• Beginning demolition of the overpass’ west
abutment
• Modifying signals to support the traffic shifts
• Complete closure of the Casey Overpass.
The Next 90 Days – Working Conditions
• Standard work day:
• 7:00AM – 7:30PM on weekdays
• 7:00AM – 3:30PM on Saturdays
• No night work scheduled at present
• When night work is needed, 2-week
advance notice will be provided by
MassDOT
Project Orientation
Project Orientation: Description
• The previous slide showed an aerial of
the project site.
• From Forest Hills:
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Doyles’ and the Monument are to the north.
Roslindale and Hyde Park are to the south.
Jamaica Pond is to the west.
Franklin Park is to the east.
East & West Roadway Traffic Modifications I - Diagram
East & West Roadway Traffic Modifications I
– Key Work Elements
• Place erosion control measures
• Place temporary walkway and ramps
adjacent to New Washington Street and at
South Street/New Washington Street.
• Place temporary barrier for pedestrian
access along Arborway frontage road
• Construct temporary WB Arborway
• Construct temporary Route 39 busway
• Construct temporary upper busway
• Stripe and sign temporary roadways
East & West Roadway Traffic Modifications II - Diagram
East & West Roadway Traffic Modifications II
-Key Work Elements
• Partial demolition of WB western bridge
approach roadway and first span
• Construct temporary courthouse
employee parking
• Construct temporary eastbound
Arborway
• Demolition of existing MBTA upper
busway and canopy
Stage 1 Construction Preview - Diagram
Stage 1 Construction Preview
-Key Work Elements
• Demolition of easterly and westerly
bridge approach roadways, abutments,
and spans
• Construction of southbound Washington
Street between South Street and
Ukraine Way
• Construction of new upper bus-way
inner bay
Responses to Questions
From January 21st
Construction Noise Control
• As part of the Casey Arborway bid
package, MassDOT included a detailed
construction noise control specification.
• Specification:
• Provides an effective tool to measure
construction noise and reduce its effect.
• Has a proven track record:
• Fore River Bridge Replacement Project (Quincy)
• Kenneth F. Burns Replacement Project
(Worcester)
How the Noise Control Plan Works
• Scientifically projects noise increase in construction
areas based on:
• Equipment to be used
• Location of work
• Prediction evaluated against applicable noise limits.
• Mitigation warranted if noise limits are exceeded.
• Mitigation measures are readied prior to work:
• Shielding noisy operations
• Means and methods – machinery types and use
• Contractor’s responsibility to comply
• MassDOT oversees compliance.
Noise Criteria Limits
• Lot-line noise limits for all receptors.
• Different limits for daytime, evening, and
nighttime:
• Daytime: 7 AM to 6 PM
• Evening: 6 PM to 10 PM
• Nighttime: 10 PM to 7 AM
• Equipment noise emission limits:
• Limits at 50 feet for different equipment at
any time of day.
Baseline Noise Monitoring
• Baseline is the noise level in a given
area under normal, everyday conditions.
• Conducted January 23-24, 2014
• 24-hourly noise readings collected in:
• Hampstead Road/Arborway Hillside
• Asticou Road/Martinwood/South Street
Neighborhood (AMSN)
• Arborway Gardens/Washingtonian Court
Baseline Noise Monitoring Locations
Baseline Noise Monitoring Locations:
Description
• The previous slide showed the baseline
noise monitoring locations.
• The noise monitoring locations are broken
down into 3 areas; area 1, 2, and 3.
• Area 1 represents the Hampstead Road
and Arborway Hillside neighborhood.
• Area 2 represents the Asticou Road
neighborhood.
• Area 3 represents Arborway Gardens and
Washingtonian Court neighborhood.
Specification Noise Limits
L10 noise readings are averaged over 20 minute intervals. Lmax noise
readings occur instantaneously.
(*) City of Boston Noise Limit (must exceed limit by 5 dBA).
(**) City of Boston Noise Limit = 86 dBA.
Specification Noise Limits: Description
• The previous slide showed a table that
defines the lot line construction noise
criteria limits in decibels.
• The noise criteria is broken down into 3
time periods.
• The first time period, day, is between 7am
and 6pm.
• The second time period, evening, is
between 6pm and 10 pm.
• The third time period, night, is between
10pm and 7 am.
Hampstead Road/Arborway Hillside
Construction Noise Lot-Line Criteria Limits
L10 noise readings are averaged over 20 minute intervals. Lmax noise readings occur instantaneously.
AMSN Construction Noise Lot-Line Criteria
Limits
L10 noise readings are averaged over 20 minute intervals. Lmax noise readings occur instantaneously.
Arborway Gardens/Washingtonian Court
Construction Noise Lot-Line Criteria Limits
L10 noise readings are averaged over 20 minute intervals. Lmax noise readings occur instantaneously.
Examples of Noise Sources
Examples of Noise Sources: Description
• The previous slide showed multiple
examples of noise levels in the form of a
decibel, abbreviated by the letters dB.
• The purpose of this slide was to allow
residents an easy comparison to familiar
objects sound output.
• Noise levels range from normal breathing
at 10 dB, to the louder types of construction
equipment at 100 dB, and a space shuttle
launch at 160 dB.
Dust and Traffic Control
A Bit About Crystalline Free Silica
• A naturally occurring
material
• Present in:
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Many types of soil
Beach sand
Glass
All concrete
Silica Safety and Prevention
• Harmful if inhaled as dust in quantity
• Contractor health and safety plan
addresses dust control on site
• Assumes a 5% silica concentration to be
present within Casey Overpass concrete.
• During demolition activities, water will be
used to minimize dust emissions, per
MassDOT and OSHA requirements
• Dust monitoring will be conducted during
concrete demolition activities
Asbestos Safety and Prevention
• Testing conducted at MassDOT request
• Tests performed:
• By two independent contractors
• At 10 locations including the deck, piers,
and abutments
• A total of 20 samples were analyzed by
two different laboratories
• The result of all 20 samples:
• Asbestos is not present in the concrete
Lead Paint
• All federal, state, local,
and OSHA regulations
will be followed
• Means and methods
control for any lead
departing the structure
during demolition:
• Girders sheared, not
torched
• Steel trucked out and
recycled off-site
Traffic
• Our goal:
• Keep traffic in the corridor
• Off neighborhood streets
• Projected cut-through routes mapped
and counts obtained during design
• No detours in this phase
Traffic Details
• Work zone intersection
control:
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Boston Police
State Police
Ensure safety
Pull traffic through work
zone
• General corridor control
• BTD
• Ensure safety
• Deter double parking
Public Outreach
Outreach to Date
• DOT and contractor staff
• Public information meetings
• January public information meeting
• March public information meeting
• 3-week look ahead emails ongoing
• Progress images shared via MassDOT
social media
• Project hotline - (617) 571-7878
Elements for the Next 90 Days
• Alerts for major traffic changes via:
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Public meetings – Early May
Project website
Email bursts
Local and city-wide media
• 1st quarterly newsletter – April, 2015
• Office hours:
• Once a month until bridge demolition complete
• Curtis Hall from 5:30-7:30
• Initial session: 3/24/15
Question & Answer
To learn more about the project, ask a question or express a concern,
please contact:
James Kersten, Legislative Affairs (857) 368-9041
Project Hot-Line: (617) 571-7878
To sign-up for the stakeholder database, please contact:
Caseyarborway.construction@dot.state.ma.us
Project website:
www.massdot.state.ma.us/caseyarborway