Milliken Boulevard Bridge over I-195
and Pocasset Street
Structural Steel Repairs, Deck Replacement,
and Substructure Repairs
Bridge Owner: MassDOT Highway Division
General Contractor: NEL Corporation, Middleton, MA
Engineer of Record: BMC Engineering, L.L.C., Middleton, MA
Prepared by: Daniel S. Crovo, P.E., District 5 Bridge Engineer
1
October 4, 2012
What type of Bridge is it?
The Milliken Boulevard bridge was bid in 1961 and built thereafter. The bridge is over 550 feet long
and is over 60 feet wide (a viaduct). It consists of 7 spans of steel beams that support the bridge deck. The
deck is a reinforced concrete slab that supports traffic by transferring wheel loads laterally to the
supporting beams or girders .
Bridge View from East
2
October 9, 2012
Bridge Geometry?
The Milliken Boulevard bridge supports 48 feet of roadway, two 6 foot wide sidewalks, electric street
lighting, steel bridge railings with protective screens, and many conduits (27).
Bridge Cross Sectional View
3
October 9, 2012
What is the condition of the Structural Steel?
The condition of the Superstructure (Steel Beams) is currently coded as Serious.
Corrosion of the steel beam ends has occurred because the leaking deck joints have allowed
p y onto the beam ends.
chloride rich water to spray
High chloride content from deicing chemicals accelerates corrosion of steel.
4
October 9, 2012
How extensive is the steel corrosion?
5
October 9, 2012
The Structural Steel Repair Process:
Install Temporary Shoring for load relief at Buckled Beam Ends;
Cut out areas of severe deterioration and install replacement steel;
Paint repair areas;
Remove Temporary Shoring.
6
October 9, 2012
How Extensive is Deck Deterioration?
The existing reinforced concrete deck is coded in Fair condition.
There are widespread areas of cracking, spalling, potholes, delaminations, and rust
staining.
Concerns over deck condition lead MassDOT to install metal shielding between the
beams in order to limit falling debris hazard.
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October 9, 2012
What’s the Plan ???
Complete the Beam End Repairs. Majority of Beam End repairs have been completed.
Remove the existing deteriorated concrete deck and replace it with a new and
improved deck with enhanced durability.
Install new deck joints and eliminate joints where possible.
Perform Pier Repairs.
8
October 9, 2012
What’s the Traffic Management Plan for Milliken Boulevard ???
During Phase I (Present time through April 2013) Southbound traffic on Milliken will
be detour via Central Street, to Main Street, to Columbia Street.
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October 9, 2012
What’s the Traffic Management Plan for Milliken Boulevard ???
During Phase II (May 2013 to Completion) Northbound traffic on Milliken may be
detoured via Pocasset Street, to Main Street, to Central Street. MassDOT is examining
way to avoid any Northbound Detour during Phase II.
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October 9, 2012
What’s the Schedule for Milliken Boulevard ???
Assuming 5 standard 8 hour days per week, 10 holidays per year, the bridge should be
substantially complete in November 2013. Breakdown of major activities as follows:
Demolish bridge deck to Pier 5: 16-Oct-12 to 19-Dec-12;
Install formwork to Pier 5: 06-Dec-12 to 18-Jan-13;
Install Deck Rebar to Pier 5: 28-Dec-12 to 18-Jan-13;;
Demolish Bridge Deck Pier 5 to North Abutment: 02-Jan-13 to 12-Feb-13;
Install formwork Pier 5 to North Abutment: 06-Feb-13 to 06-Mar-13;
Install Deck Rebar Pier 5 to North Abutment: 21-Feb-13 to 06-Mar-13;
Set Screeds and Finishing Machine: 18-Mar-13 to 22-Mar-13;
Place Phase I Deck: 25-Mar-13 to 04-Apr-13;
Cure Bridge Deck: 30-Mar-13 to 18-April-13;
Install sidewalk, railing bridge joints, lighting, and pavement: 18-Apr-13 to 08-May-13;
Above activities repeated for Phase 2: 10-May-13 to Substantial Completion 18-Nov-13.
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October 9, 2012