hms presentation october 2010sp.bridges.transportation.org/documents/2011 scobs...bridge (10-year...

Innovation, Efficiency, Transparency

H MS P R E S E N T A T I O N O C T O B E R 2 0 1 0


MassDOT Accelerated Bridge Program Fore River Bridge is a key component of the MassDOT

Accelerated Bridge Program (ABP) $3B commitment over 8 years Goal to reduce the number of structurally deficient bridges

over life of the program Innovative techniques to be used

– Accelerated Bridge Construction Techniques– Advanced Project Scheduling and New Estimating Techniques– Streamlined Environmental Permitting– Single-Phase Construction– Innovative Construction Contracting


Location Map: New England


Location Map


Project History 1902 – Swing bridge constructed at the site 1936 – Bascule Bridge constructed at the site 1973 – MassDOT proposes 300-foot channel width 1986 – Fore River Shipyard closes 1997 – MassDOT proposes bridge rehab requiring temporary

bridge (10-year design) 2000 – 1936 bridge condition found too deteriorated 2002 – Type study performed 2003 – Temporary Bridge opens 2004 – 1936 Bridge Demolished 2009 – Fender system upgraded 2012 – D-B contract date 2016 – Construction complete


Fore River Shipyard & 1902 Swing Bridge


Fore River Shipyard 50,000 employees during World War II

Thomas W. Larson, 1902 USS Massachusetts, 1942


1936 Historic Bascule Bridge


Existing Temporary Bridge


Channel Navigation Fore River is a Designated Port Area (DPA) under the

Massachusetts Office of Coastal Zone Management Fore River provides marine access to local yacht clubs, the

former shipyard property, and the CITGO tank farm Navigational usage today

– Panamax Class Oil Tankers– 175-foot channel too narrow

Future navigational usage– 250-foot acceptable– 225-foot absolute minimum

GOAL: Improve Navigation Access

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Roadway Traffic Usage Route 3A provides a vital roadway link to Boston for South

Shore residents Route 3A carries approximately 32,000 vehicles per day Bridge openings have an impact on commuting times Alternate routes around the Fore River Bridge are long and

involve passing through congested intersections

GOAL: Reduce Number of Openings

GOAL: Reduce Total Duration of Openings


Conceptual Roadway Profile

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Typical Cross Section


Movable Structure AlternativesBascule


Movable Structure AlternativesVertical Lift


Recorded Annual Bridge Openings

Tanker 131 188 163 136 173 165

Barge 104 84 99 151 105 110

Tugboat 45 32 9 29 47 29Miscel laneous Commercia l Vessel*

N/A 19 42 60 93 54

Sloop 327 87 85 79 85 84Bridge Maintenance/ Testing

39 61 181 167 200 152

Tota l 646 471 579 622 703 594

*Includes freighters , car carriers , supply ships , construction support vessels , etc.

Recorded Annual Openings (August through July)

Vessel Type

Temporary Bridge Opening Log DataBascule Bridge

Opening Log Data , 2000

2005-2006 2006-2007 2007-2008 2008-2009 Average


Analysis of Sloop Openings


Projected Annual Bridge Openings

Tanker 165 165 165

Barge 110 110 110

Tugboat 29 29 29

Miscel laneous Commercia l Vessel* 54 54 54

Sloop 57 235 84

Bridge Maintenance/ Testing 60 40 152

Total 475 633 594*Includes freighters , car carriers , supply ships , construction support vessels , etc.

Projected - Vertica l Li ft

Average Recorded - Temporary

Vessel Type

Projected Annual Openings (August through July)

Projected - Bascule


Scour Results – 500-Year Storm

Bascule Bridge

Vertical Lift Bridge – North Towers


Vertical Lifts: Temporary vs Permanent

CRITERIA TEMPORARY PERMANENT

DESIGN LIFE 15 YEARS 75 YEARS

BASIS FOR MECHANICAL DESIGN CRANE GUIDELINES AASHTO

OPERATES IN HIGH WINDS NO YES

WIRE ROPE LUBRICATION CONSTANT MAINTENANCE NORMAL MAINT.

NAVIGATION CHANNEL WIDTH 175 FT 250 FT

EASE OF NAVIGATION DIFFICULT EASIER

DECK SYSTEM STEEL (LOUD) CONCRETE

AVERAGE OPENING TIME 21 MINUTES 13 MINUTES (EST.)


Bascule Bridge


Proposed Vertical Lift – No Cladding


Bascule Bridge


Proposed Vertical Lift – Clad Option


Tower Alternatives


Bridge ComparisonCRITERIA VERTICAL LIFT BASCULE

HORIZONTAL CHANNEL CLEARANCE 250’ 225’

VERTICAL CHANNEL CLEARANCE 58’ 41’

PROJECTED NUMBER OF OPENINGS 475 633

FOUNDATION FOOTPRINT 10,000 SF 18,000 SF

ANNUAL LIFE CYCLE COST $8.9 MILLION $9.4 MILLION

FABRICATION/INSTALLATION OF MACHINERY EASE OF MAINTENANCE

RIDEABILITY EASE OF NAVIGATION

PERMITTING AESTHETICS

ABILITY TO MEET PROJECT GOALS = Preferred Alternative


Thank You –Questions

hms presentation october 2010sp.bridges.transportation.org/documents/2011 scobs...bridge (10-year...

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