11

Designated Historic Landmark

Opened to Traffic in 1883

Construction is Scheduled 2009-2014

Overnight Construction

Limited Weekend Construction

22

Brooklyn Approach

York Street (South View)

Main Street (South View)

Washington Street (South View)

Arch Blocks

(South View)

Sands Street (South View)Prospect Street

(South View)

33

Brooklyn Bridge Contract 6 - Project Challenges

• Replace waterproofing membrane under the approach roadway pavement

• Replace reinforced concrete decks (bridges)

• Correct deterioration of steel framing (bridges)

• Improve earthquake resistance

• Maintain traffic – no 24/7 closures

• Increase capacity of SB FDR exit ramp (widen ramp A)

• Meter traffic flow of NB FDR exit ramp

• Improve traffic flow at merge with main approach

• Widen road F (Brooklyn side)

44

Replace bridge deck. Ramps and approaches:

• Arch blocks A to G Manhattan.

• Arch blocks I to III Brooklyn

• Ramps A B C F G H and I Manhattan

• New pre-cast slab over arches

• Steel grid deck filled with concrete on the ramps

• Orthotropic deck for the Franklin square structure.

Project Scope – Contract 6

55

Complete replacement of superstructures for:

York street and main street structures- Brooklyn

Reconfiguration (widening) of ramp A at gore areas between: ramps A and C; ramps A and B; ramps A and G

Replacement of existing bearings with elastomeric bearings for all ramp and approach structures to meet current seismic requirements.

Repair or re-pointing of stone masonry structures.

Additional rehabilitation measures at both anchorages for seismic retrofitting the existing trusses.

Painting of the entire bridge

Provide maintenance and protection of traffic for all stages of construction.

Project Scope

Continued

66

Installation of new steel barriers and rehabilitation of existing historical barriers.

Replacement of expansion joints.

Installation of new drainage system.

Installation of new water proofing membrane.

Strengthening or replacement of deficient members.

Project Scope

Continued

77

Precast construction

• Precast panels will be placed overnight or weekend operations

• Waterproofing membrane field installed

100,000 sf of pavement

Repair voids (concrete fill)

Approach roadway reconstruction (masonry arches)

88

Aging Roadway

Promenade

Aging Roadway

Brick ArchBrick Arch

Typical Section Through Arch

FillFill

Crown of ArchCrown of ArchDeteriorated Closure Walls (Typ)Deteriorated Closure Walls (Typ)

Failed Membrane

System

Approach Roadway Rehabilitation

99

Grouting Pocket and Doweling Requirements

Dowel Bar(Typ)

Precast Concrete Panel

Sprayed-On

Waterproofing

Membrane

DistributionChannel

GroutingPorts

Existing Concrete FillFine Fill (Bedding)

3” Thickness

Approach Roadway Rehabilitation (Precast)

1010

• Night time/weekend construction

• Bearing replacement – Elastomeric bearings

• Steel strengthening upgrade to H20 capacity

Park Row – strengthen existing framing + grid filled deck system

Franklin Square – New floor beams + Orthotropic deck

Main and York Street – New steel girders + grid filled deck system

Prospect, Washington, Sand Street - Strengthen existing framing + grid filled deck system

Approach Structures RehabilitationApproach Structures Rehabilitation

1111

• Night time construction

• Superstructure: precast grid filled deck system

• Gore area widening of ramps A & C, A & B and A & G

• Bearing replacement – elastomeric bearings

• Steel strengthening upgrade to H20 capacity

• Painting will follow rehabilitation

• Road F (Brooklyn approach) widening

Ramp Structures Rehabilitation

1212

Ramp Structures RehabilitationRamp Structures Rehabilitation

Existing Steel Beam

Limits of Deck Removal

1313

Ramp Structures Rehabilitation

Existing Steel Beam

Limits of Temporary Bridge Units

1414

• Install Lateral Bracing Between PP 115 and 122• Reconfigure Floorbeam Diagonals At PP 116 Thru 121.

Main Span – Seismic Retrofitting

• Install Slide Bars In Distribution Truss

• Bottom Chords At Bridge Expansion Joints

• Replace Bottom Chord Bearing Beams At PP 122.• Replace Bottom Chords Between PP 121 And 122.

1515

Install clamping devices on eye bar members.

Install new lower lateral bracing diagonals.

Replace sway bracings.

Install arch column bracing.

Install new seismic shoes.

Franklin Square – Seismic Retrofitting

1717

Bridge Cross-SectionBridge Cross-Section

1818

All three travel lanes will be maintained (peak hours)

Minimum four crews are expected (1.5 year)

Equipment will be placed on barges (Manhattan side)

Equipment on land and barges (Brooklyn side)

Dust collector ~ 30,000 lbs ea. (2 needed)

Compressor ~ 20,000 lbs ea. (4 needed)

Vacuum/recycle units ~ 120,000 lbs. (2 needed)

Main Span Painting Staging / Equipment

2020

Temporarily close Brooklyn bridge west bound weekends and overnight traffic

Maintain Brooklyn bridge east bound weekends and overnight traffic

Divert Brooklyn bridge west bound weekend and overnight traffic to Manhattan bridge

Implement disincentive and incentives clauses (user cost based)

Maintenance & Protection of Traffic

2121

Westbound Detours C & D

Manhattan Bridge 3.0 Miles

Brooklyn Battery Tunnel 7.0 Miles

2222

Night time Full Closures (One Direction)

Closure Hours

West & Eastbound Lanes

Sunday Night to Friday 11:00 P.M. to 6:00 A.M.

Saturday 12:01 A.M. to 7:00 A.M.

Sunday 12:01 A.M. to 9:00 A.M.

2323

Closure Hours

Daytime Single Lane Closures

Westbound

Weekdays None

Saturday None

Sunday 6:00 A.M. to 12:00 Noon

Eastbound

Weekdays 7:00 A.M. to 3:00 P.M.

Saturday 2:00 A.M. to 2:00 P.M.

Sunday 2:00 A.M. to 2:00 P.M.

2424

Weekend Full Closures

Westbound

•Saturday 12:00 A.M. through Monday 5:00 A.M. = 53 hours

•Eastbound

•Saturday 1:00 A.M. through Monday 6:00 A.M. = 53 hours

Total number 24 (12 EB and 12 WB)

Closure Hours

2525

Brooklyn Bridge Staging (Night time & Weekends)

2626

Brooklyn Bridge Staging (Nighttime & Weekends)

2727

Incentive & Disincentive Clauses

Disincentives

Penalty Cost = $1000 per minute

Incentives

Will be Established Based on Attainment of Milestones

Reduction in Number of Weekend Closures

User Cost Studies

2828

Community Outreach ProgramCommunity Outreach Program

Full time, senior community liaison in the fieldFull time, senior community liaison in the field 24-Hour community hotline24-Hour community hotline Project BrochureProject Brochure Project page on DOT websiteProject page on DOT website Media OutreachMedia Outreach Radio AnnouncementsRadio Announcements VMS BoardsVMS Boards Project NewslettersProject Newsletters Important NoticesImportant Notices Local Bulletin BoardsLocal Bulletin Boards

2929

Program ElementsProgram Elements::

Full time senior level Community Liaison:Full time senior level Community Liaison: Presentations to:Presentations to:

• Elected officialsElected officials• Community BoardsCommunity Boards• Business Improvement DistrictsBusiness Improvement Districts• Civic, community, merchant, tenant groupsCivic, community, merchant, tenant groups

Participation on District and Borough Service CabinetsParticipation on District and Borough Service Cabinets Regular visits to: Regular visits to:

• Local schools Local schools • Medical facilitiesMedical facilities• LibrariesLibraries

NYCHA facilitiesNYCHA facilities Door to door visits with businesses in the areas of impactDoor to door visits with businesses in the areas of impact

3030

Thank YouThank You

Q&AQ&A