Design Public Hearing. River Street and Western Avenue Bridge Rehabilitation Project

Transcription

1 Tuesday, 7:00 P.M. Morse Elementary School 40 Granite Street Cambridge, MA

2 Patrick-Murray Accelerated Bridge Program Authorization: Chapter 233 of the Acts of 2008 Program to be complete by 2016 Program Overview Program Goals: Improve the Condition of the Commonwealth's Bridges Stimulate Economic Development and Job Creation Save Money by Completing Projects Sooner Complete Projects Efficiently and Innovatively Provide Access and Opportunity for all Manage with Transparency and Accountability Size and Scope Rehabilitation or replacement of 218 bridges Preservation of 355 bridges MassDOT Total Program: $2,984,000,000

3 Agenda Review of the Patrick-Murray Accelerated Bridge Program Charles River Basin Overview Existing Conditions Structural Sketch Plans Traffic Bicycle/ Pedestrian Environmental Considerations Historical/ Cultural Considerations Question & Answer

4 Project Location Anderson Memorial Bridge Western Avenue Bridges River Street Bridges Craigie Drawbridge and Dam Bridge Longfellow Bridge B. U. Bridge

5 Bridge Rehabilitation Project Goals To rehabilitate the River Street and Western Avenue Bridges to continue to efficiently and safely meet the needs of the traveling public, while maintaining their structural integrity, preserving their historic nature, and improving the needs of all users including motorists, cyclists, pedestrians, and recreational boaters.

6 Proposed Rehabilitation Concept Design Goals and Parameters Design Goals Structural Maintain Historic Appearance, while upgrading bridge features to current codes and standards Repair Parapets, Spandrel Walls, and the Arches Final Condition Multi-Use Facilities Three Vehicular Traffic Lanes Improve non-motorized user facilities Construction Conditions Maintain two Vehicular Traffic Lanes Maintain Pedestrian and Bicycle access to the bridge Maintain two unobstructed navigation channels, coordinated between both arch bridges, through the arches at all times

7 River Street Bridges NORTH CAMBRIDGE BOSTON CHARLES RIVER

8 Western Avenue Bridges BOSTON NORTH CAMBRIDGE CHARLES RIVER

9 River Street Existing Conditions River Street Arch Bridge over Charles River Arch Barrels Widespread Spalling and Delamination of Concrete High Concentrations of Chloride Content which may promote Steel Reinforcement Corrosion Lack of Air-Entrainment (Common in 1920 s), Concrete More Susceptible to Freeze/Thaw effects Minor Alkali Silica Reactivity which will continue to accelerate in moist environment

10 Western Avenue Existing Conditions Western Avenue Arch Bridge over Charles River Arch Barrels Minor Localized Spalling and Delamination of Concrete Low to Moderate Concentrations of Chloride Content which may promote Steel Reinforcement Corrosion Lack of Air-Entrainment (Common in 1920 s), Concrete More Susceptible to Freeze/Thaw effects Minor Alkali Silica Reactivity which will continue to accelerate in moist environment Localized Moderate Cracking and Efflorescence near Southern Portion of Cambridge Arch (Beneath Water Mains)

11 River Street Existing Conditions River Street Arch Bridge over Charles River Arch Ringstones (Voussoirs) Separation of Ringstones from Arch Barrels (Up to 3 ) Deterioration of dowels anchoring Ringstones into Arch Barrels represent a falling hazard Widespread Deterioration of Ringstone Concrete Spandrel Walls Massive Gravity Retaining Walls Outward Movement Detected Widespread Deterioration of Concrete

12 Western Avenue Existing Conditions Western Avenue Arch Bridge over Charles River Arch Ringstones (Voussoirs) Cast against the original arch barrel by cold joint Different concrete material than arch barrel. Breakup is evident at the interface of the two concrete materials. This represents a falling hazard. Spandrel Walls Cast integrally with the arch barrel near the piers Minor Outward Movement Detected

13 River Street Existing Conditions River Street Arch Bridge over Charles River Concrete Parapet and Sidewalk Parapet (Railing) shows misalignment due to movement of spandrel wall Parapet is not capable of resisting vehicular impact Concrete sidewalk is non-reinforced and deteriorating Due to Spandrel Wall movement, Sidewalk cross-slope has deteriorated Abutments, Piers, Wingwalls Deterioration of timber piles supporting wingwalls causing settlement cracking Widespread Deterioration of Concrete Piers and Cutwaters

14 Western Avenue Existing Conditions Western Avenue Arch Bridge over Charles River Concrete Parapet and Sidewalk Parapet (Railing) shows minor misalignment due to movement of spandrel wall Parapet is not capable of resisting vehicular impact Concrete sidewalk is non-reinforced Due to Spandrel Wall movement, Sidewalk cross-slope is deteriorating Abutments, Piers, Wingwalls Deterioration of Concrete, especially on Cambridge Side Deterioration of Concrete Piers and Cutwaters

15 River Street Existing Conditions River Street Arch Bridge over Charles River Existing Cross-Section Above Existing Section through the Quarter Point of the Center Arch Left Existing Section through the south sidewalk near the Quarter Point of the Center Arch

16 Western Avenue Bridge Existing Cross-Section Existing Cross Section through Parapet, Spandrel Wall, Arch Ring, Sidewalk, Roadway, and Utilities. Existing Conditions will need to be Upgraded from Original Design to meet current load and vehicular impact requirements.

17 Cambridge Street Existing Conditions Cambridge Street over Soldiers Field Road Concrete Tee Beams and Deck Evidence of Shear Failure near the southwest corner Below Statutory Load Rating of the Concrete Deck and Tee Beams adjacent to Concrete Encased Utilities Moderate Concrete Deterioration present throughout the bridge Sidewalks and Railings Localized Deterioration of Sidewalks, particularly at the corners Existing Railing is not capable of resisting a vehicular impact Sidewalk access is not ADA Compliant

18 Western Avenue Existing Conditions Western Avenue over Soldiers Field Road Concrete Tee Beams and Deck Below Statutory Load Rating of the Concrete Deck and Tee Beams adjacent to Concrete Encased Utilities Moderate Concrete Deterioration present throughout the bridge

19 Cambridge Street Proposed Rehab. Concept Elevation: Cambridge Street over Soldiers Field Road

20 Cambridge Street Proposed Rehab. Concept Cross-Section: Cambridge Street over Soldiers Field Road -Precast Concrete Northeast Extreme Tee (NEXT) Beams -Maintain three vehicular travel lanes -Installation of Grade Separated Cycle Track and Sidewalk Widening -Installation of Crash-Resistant Barrier and Refurbishment/Reinstallation of Existing Bridge Fascia Rail

21 Western Avenue Proposed Rehab. Concept Elevation: Western Avenue over Soldiers Field Road

22 Western Avenue Proposed Rehab. Concept Cross-Section: Western Avenue over Soldiers Field Road -Precast Concrete Northeast Extreme Tee (NEXT) Beams -Maintain three vehicular travel lanes -Installation of Grade Separated Cycle Track and Sidewalk Widening -Installation of Crash-Resistant Barrier and Refurbishment/Reinstallation of Existing Bridge Fascia Rail

23 Proposed Rehabilitation Concept Staged Construction: Bridges over Soldiers Field Road

24 River Street Proposed Rehabilitation Concept

25 River Street Proposed Rehabilitation Concept Final Elevation: River Street over the Charles River Design Features New Reinforced Concrete Parapet New Spandrel Walls New Arch Ring Stones New Pile Supported Retaining Walls (Wingwalls) New Sidewalks New Roadway Repaired Piers & Abutments Repaired Concrete Arch Barrels Corner Expansion at Southwest Corner ( The Narrows All proposed features are designed to restore the bridge to its historic appearance.

26 River Street Proposed Rehabilitation Concept Final Cross-Section: River Street Arch Bridge over Charles River Design Features Controlled Density Fill Moment Slab Sidewalk Design for Impact Resistance Structural Concrete Frame Spandrels New Roadway and Concrete Slab Widened Non- Motorized Facilities and Dedicated Cycle Track Maintain 3 Motor Vehicle Traffic Lanes Repaired Piers New Bridge Street Lighting consistent with historic street lighting

27 River Street Proposed Rehabilitation Concept Final Cross-Section: River Street Arch Bridge over Charles River Design Features Controlled Density Fill Moment Slab Sidewalk Design for Impact Resistance New Roadway and Concrete Slab Widened Non-Motorized Facilities and Dedicated Cycle Track Maintain 3 Motor Vehicle Traffic Lanes Repaired Abutments and New Pile Supported Wingwalls New Bridge Street Lighting consistent with historic street lighting

28 Western Ave Proposed Rehabilitation Concept

29 Western Ave Proposed Rehabilitation Concept Final Elevation: Western Avenue over the Charles River Design Features New Reinforced Concrete Parapet New Spandrel Walls New Arch Ring Stones New Sidewalks New Roadway Repaired Piers & Abutments Repaired Retaining Walls (Wingwalls) Repaired Concrete Arch Barrels All proposed features are designed to restore the bridge to its historic appearance.

30 Western Ave Proposed Rehabilitation Concept Final Cross-Section: Western Avenue Arch Bridge over Charles River Design Features Controlled Density Fill Moment Slab Sidewalk Design for Impact Resistance Structural Concrete Frame Spandrels New Roadway and Concrete Slab Widened Non- Motorized Facilities and Dedicated Cycle Track Maintain 3 Motor Vehicle Traffic Lanes Repaired Piers New Bridge Street Lighting consistent with historic street lighting

31 Western Ave Proposed Rehabilitation Concept Final Cross-Section: Western Avenue Arch Bridge over Charles River Design Features Controlled Density Fill Moment Slab Sidewalk Design for Impact Resistance New Roadway and Concrete Slab Widened Non-Motorized Facilities and Dedicated Cycle Track Maintain 3 Motor Vehicle Traffic Lanes Repaired Abutments and New Pile Supported Wingwalls New Bridge Street Lighting consistent with historic street lighting Lower Cross-Section is through the Abutment, looking East

32 Proposed Rehabilitation Concept Staged Construction: Arch Bridges over Charles River

33 Proposed Rehabilitation Concept Staged Construction: Arch Bridges over Charles River

34 Traffic - River Street Bridge Existing peak hour volumes on the River Street Bridge AM (PM)

35 Traffic - River Street Bridge River Street Existing Conditions AM Peak has highest volumes Coordinated with 140s cycles River St./Memorial Dr. EB right turns heavy during AM Queue often reaches SFR River St./Soldiers Field Rd. Phasing constantly processes vehicles onto the River Street bridge. SimTraffic of River Street during the morning peak hour

36 Traffic - Western Avenue Bridge Existing peak hour volumes on the Western Avenue Bridge Soldiers Field Road AM (PM) 359 (601) Memorial Drive

37 Traffic - Western Avenue Bridge Western Avenue Existing Conditions PM Peak has highest volumes Coordinated with 90s cycles Western Ave./Soldiers Field Rd. WB right turns heavy during PM Western Ave./Memorial Drive Phasing constantly processes vehicles onto the Western Avenue bridge. SimTraffic of Western Avenue during the evening peak hour

38 Traffic Proposed Improvements Pavement Markings and Signage New striping to clearly define lanes Improve lane utilization and capacity Reduce likelihood of vehicle conflicts New signage Assist driver navigation Reduce confusion New Traffic Signal Equipment Overhead vehicle indications mast-arms and span wires Improve visibility of vehicle indications Indications for Pedestrians and Bicyclists

39 Traffic Proposed Improvements Traffic Signal Operations Updated clearance times for all modes Reduce likelihood of crashes Conform to current design standards Improved traffic signal phasing Optimize the capacity at each signal Reduce conflicting movements Increase the amount of concurrent bike and pedestrian phases Enhance Signal Coordination Better progression between signals

40 Existing Pedestrian/Bicycle Conditions Lack of ADA compliance Lack of pedestrian signal indications Varying path widths Narrow sidewalks Insufficient queuing space at intersections Lack of bicycle accommodations

41 Existing Pedestrian/Bicycle Counts Data Functional Design Report Turning Movement Counts December 2009 February 2010 September 2010 Other Projects: Charles River Basin Pedestrian and Bicycle Study for Pathways and Bridges September 2009 May 2010 September 2010 May 2011 September 2011

42 Bridge Bicyclists Location 67% 33% 76% 24% 70% 30% 73% HARDESTY 27% & HANOVER, LLP

43 Summary of Count Data Varied by day and season Bridge non-motorized volumes similar to path volumes Majority of bicyclists on bridges are traveling with the flow of traffic River Street Bridge: ~ 40% bicyclists ~ 60% pedestrians and joggers Western Avenue Bridge: ~ 35% bicyclists ~ 65% pedestrians and joggers

44 Project Context Functional Design Report December 2010 On-street Bicycle Lanes Option On-street Cycle Track Option Off-street Shared Use Path Adjacent Facilities Determined Winter 2011 Existing and Planned Bicycle Facilities Shared Use Path Cycle Track Shared Roadway

45 Cycle Tracks Physically separated from motorists and pedestrians Higher level of comfort for bicyclists Special intersection treatments Currently cycle tracks are installed in: Cambridge, MA Boston, MA Washington, DC New York City, NY Minneapolis, MN Portland, OR Photo by Tom Bertulis

46 Bicycle Facility Type Off-street Cycle Track Speed differential between users Existing usage patterns Sight Lines Right Turn Conflicts Facility Continuity

47 Grade Separated Pedestrian Underpasses River Street Bridge over Charles River Typical Configuration -Underpass path design parameters are as specified in 2006 Massachusetts Highway Department PD&DG -Due to vertical clearance issues, the pathway grade is set at Ordinary High Water Elevation requiring Box Culvert concrete boat section -30 Utility Inverted Syphon section below the Box Culvert tunnel required RED AREA represents open water fill encroachment into Charles River to support approach paths

48 Grade Separated Pedestrian Underpasses Western Avenue Bridge over Charles River Cambridge Side -Underpass path design parameters are as specified in 2006 Massachusetts Highway Department PD&DG -Due to vertical clearance issues, the pathway grade is set at Ordinary High Water Elevation requiring Box Culvert concrete boat section -Horizontal space restrictions force the tunnel behind the bridge abutment, moving the esplanade path towards Memorial Drive, eliminating the existing landscaped buffer

49 Grade Separated Pedestrian Underpasses Project Impacts Grade Separated Pedestrian Underpasses will not be implemented as part of this project Cost Preliminary Estimate of Underpass Tunnels = $16 Million Environmental / Cultural Resources Impacts Grade Separated Pedestrian Underpasses would result in an Adverse Effect determination under Section 106 of the National Historic Preservation Act of 1966 At-grade improvements currently proposed would likely result in a determination of No Adverse Effect The Section 106 process requires consultation to resolve the Adverse Effect by seeking prudent and feasible alternatives to avoid, minimize or mitigate the Adverse Effect. The at-grade improvements shown in the 25% design would be considered a prudent and feasible alternative to avoid the Adverse Effect. An Army Corps of Engineers (ACOE) permit cannot be granted until a determination of No Adverse Effect is made or a Memorandum of Agreement with the Massachusetts Historical Commission (MHC) is executed.

50 Intersection Corner Improvements Western Avenue/Soldiers Field Road Boston Western Avenue/Memorial Drive Soldiers Field Rd River Street/Soldiers Field Road Memorial Dr Cambridge River Street/Memorial Drive Boston Cambridge

51 Western Avenue Pork Chop Guides all EB vehicles to turn right Prevent vehicles from traveling across Western Ave in wrong direction Pedestrian and bike refuge Reduces the number of phases per cycle and therefore reduces the amount of delay for all users Retaining large strain pole and foundation

52 River Street / SF Road The Narrows South Approach to River Street Bridge Boston Side Existing Proposed

53 River Street / SF Road The Narrows Existing Conditions

54 River Street / SF Road The Narrows Proposed Conditions

55 Charles River Crossings Charles River Path Crossing Summary Crossing Time Crossing Distance Intersection Existing Proposed Change Existing Proposed Change River Memorial Drive 19 sec 35 sec +16 sec 55 ft 46 ft - 9 ft River Soldiers Field Road 21 sec +21 sec 57 ft 33 ft -24 ft Western Memorial Drive 19 sec 19 s 0 54 ft 40 ft -14 ft Western Soldiers Field Road 19 sec 41 sec +22 sec 56 ft 40 ft -16 ft

56 Western Avenue Proposed Design

57 River Street/Soldiers Field Road

58 River Street/Memorial Drive

59 River Street Existing Cross Section

60 River Street Proposed Cross Section

61 Western Avenue Existing Cross Section

62 Western Avenue Proposed Cross Section

63 Overall Pedestrian/Bicycle Improvements All new signal equipment and timings All crosswalks will include pedestrian indications Improve queue space at corners Widened ramps at trail crossings Widened sidewalks Improved signage & Way finding

64 Landscape Approach MEMORIAL DRIVE Proposed landscape impacts along the Charles River Basin Reservation are primarily isolated to areas adjacent to the bridges. Temporary Disturbance Areas (TDA) total ~ 0.07 acres of land. Provide landscape restoration in impacted areas primarily by control of invasive plant species, restoring grass, and 2:1 replacement of trees. Include design details to protect the bridge structure by discouraging woody plants from establishing at the base of abutments.

65 Regulatory Requirements Section 106 of National Historic Preservation Act (NHPA) Massachusetts Environmental Policy Act (MEPA) and regulations at 310 CMR Informational ENF MA Wetlands Protection Act - Order of Conditions from Boston and Cambridge Conservation Commissions Clean Water Act/Rivers and Harbors Act - Army Corps Permit Clean Water Act - MassDEP 401 Water Quality Certificate Public Waterfront Act (MGL Chapter 91) Minor Modification MA DCR Construction Access Permit MWRA 8(m) Permit United States Coast Guard Construction Approval Letter US EPA NPDES Permit

66 Avoiding Adverse Effects Under s. 106 Project Team will work to achieve a finding of No Adverse Effect through the following efforts: Section 106 Consultation with Massachusetts Historical Commission, Cambridge Historical Commission, and Boston Landmarks Commission throughout design and construction process. Application of Secretary of the Interior Standards for Rehabilitation: Preserve historic character; Avoid conjectural historical elements; Maintain distinctive materials, features, finishes and construction techniques; Repair or replace elements with matching materials; Use gentlest possible chemical and physical treatments; Identify and preserve the relationship of a property to its setting; and Preserve surrounding landscapes and visual relationships with surrounding properties.

67 Identification of Historic Properties Western Avenue Bridge (1924, Desmond & Lord) and River Street Bridge (1926, Robert Bellows & Ralph W. Gray) Concrete bridges with cast stone ornament. Contributing resources to Charles River Basin National Register Historic District (CRBHD). Engineered by John Rablin, Metropolitan District Commission (MDC). Invitational design competition: the best a cultured community can create. Beaux Arts design supported vision of Charles River Basin as recreational and scenic amenity. Architectural treatments, including the solid concrete parapets, are significant character-defining features. Charles River Basin National Register Historic District (listed 1978) Major component of greater Boston parks system, conceived by Charles Eliot, 1st park system realized in US. Potential for visual impacts to CRBHD contributing resources near bridges.

68 To submit comments or request more information, please contact: Thomas Broderick, P.E., Chief Engineer Attn: Shoukry A. Elnahal, P.E Director of Accelerated Bridge Program Massachusetts Department of Transportation - Highway Division 10 Park Plaza Boston, MA To be added to the project distribution database, please contact: Stephanie Boundy, Public Outreach Coordinator MassDOT, Accelerated Bridge Program or Stephanie.Boundy@state.ma.us

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