Conceptual Design Meeting. River Street and Western Avenue Bridge Rehabilitation Project

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1 Monday, 6:30 PM - 8:00 PM Honan-Allston Branch Library 300 North Harvard Street Allston, MA

2 Patrick-Murray Accelerated Bridge Program 2009 Program Overview Authorization: Chapter 233 of the Acts of 2008 Program to be complete by 2016 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

3 Patrick-Murray Accelerated Bridge Program Program Overview- 8 years only Size and Scope Former MassHighway: $2.078 billion rehabilitation or replacement of 189 bridges preservation of 305 bridges Former DCR: $906 million rehabilitation or replacement of 29 bridges preservation of 50 bridges MassDOT Total Program: $2,984,000,000

4 Agenda Review of the Patrick-Murray Accelerated Bridge Program Charles River Basin Overview Structural Rehabilitation Concept Traffic Bicycle/ Pedestrian Historical/ Cultural Considerations Question & Answer

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

6 Bridge Rehabilitation Project Goals To repair the structurally deficient bridges to meet current and future multi-modal transportation needs and extend the life of the bridge, while preserving and rehabilitating the historical, cultural, and natural resources in the project area.

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

8 River Street Bridges BOSTON SOLDIERS FIELD ROAD CAMBRIDGE STREET CAMBRIDGE NORTH RIVER STREET BRIDGE MEMORIAL DRIVE RIVER STREET 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 River Street Existing Conditions River Street Arch Bridge over Charles River Arch Ringstones (Voussures) 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

11 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 Sidewalk is un-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

12 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

13 River Street Proposed Rehabilitation Concept Design Goals and Parameters

14 River Street Proposed Rehabilitation Concept Final Elevation: River Street over the Charles River

15 River Street Proposed Rehabilitation Concept Final Cross-Section: River Street Arch Bridge over Charles River

16 River Street Proposed Rehabilitation Concept Final Cross-Section: River Street Arch Bridge over Charles River

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

19 Cambridge Street Proposed Rehab. Concept Cross-Section: Cambridge Street over Soldiers Field Road -NEXT Beams -Implementation of Grade Separated Cycle Track and Sidewalk Widening -Installation of Crash-Resistant Barrier and Reinstallation of Existing Bridge Fascia Rail

20 Western Avenue Bridges BOSTON NORTH MEMORIAL DRIVE CAMBRIDGE WESTERN AVENUE SOLDIERS FIELD ROAD CHARLES RIVER

21 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)

22 Western Avenue Existing Conditions Western Avenue Arch Bridge over Charles River Arch Ringstones (Voussures) 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

23 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 Sidewalk is un-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

24 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.

25 Western Avenue Bridge

26 Western Ave Proposed Rehabilitation Concept Final Elevation: Western Avenue over the Charles River

27 Western Ave Proposed Rehabilitation Concept Final Cross-Section: Western Avenue Arch Bridge over Charles River

28 Western Ave Proposed Rehabilitation Concept Final Cross-Section: Western Avenue Arch Bridge over Charles River

29 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

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

31 Western Avenue Proposed Rehab. Concept Cross-Section: Western Avenue over Soldiers Field Road -NEXT Beams -Implementation of Two Way Grade Separated Cycle Tracks while Maintaining Sidewalk Widths -Installation of Crash-Resistant Barrier and Reinstallation of Existing Bridge Fascia Rail

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 I-90 ramps Cambridge Street I-90 Off-ramp 409 (388) Soldiers Field Road 85 (87) River Street 1,361 (1,067)1,856 (1,542) AM (PM) Memorial Drive

35 Traffic - River Street Bridge River Street Existing Conditions AM Peak has highest volumes Coordinated with 140s cycles River St./Memorial Dr. River Street g/c ratio: 60s/140s 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 - River Street Bridge 350 River Street Queue capacity on the River Street bridge is approximately 50 passenger vehicles. Reducing the bridge from 3 travel lanes to 2 travel lanes would reduce the queue capacity to approximately 34 passenger vehicles. Spillback to Soldiers Field Road occasionally occurs during the AM peak period especially in the right-turn lane. Spillback will occur more frequently with a reduction in lanes regardless of future retiming.

37 Traffic - Western Avenue Bridge Existing peak hour volumes on the Western Avenue Bridge Soldiers Field Road WESTERN AVENUE 1,400 (1,873) 208 (170) 833 (1094) AM (PM) 359 (601) Memorial Drive

38 Traffic - Western Avenue Bridge Western Avenue Existing Conditions PM Peak has highest volumes Coordinated with 90s cycles Western Ave./Soldiers Field Rd. Western Ave g/c ratio: 42s/90s 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

39 Traffic - Western Avenue Bridge 390 Western Avenue Queue capacity on the Western Avenue bridge is approximately 55 passenger vehicles. Reducing the bridge from 3 travel lanes to 2 travel lanes would reduce the queue capacity to approximately 36 passenger vehicles. Spillback to Memorial Drive occasionally occurs during the PM peak period. Spillback will occur more frequently with a reduction in lanes regardless of future retiming.

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

42 Bridge Bicyclists Location Existing Pedestrian/Bicycle Counts 69% 31% 83% 17% 78% 22% 83% HARDESTY 17% & 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 Western Avenue River Street Cambridge Street Shared Use Path Cycle Track Bicycle Lane

45 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 Western Avenue River Street Cambridge Street Shared Use Path Cycle Track Bicycle Lane

46 Cycle Tracks Physically separated from the roadway and sidewalk Higher level of comfort for bicyclist s 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

47 Project Coordination Stakeholders Coordination: MassDOT Dept. of Conservation and Recreation (DCR) City of Boston City of Cambridge LivableStreets MassBike WalkBoston

48 Selection of Facility Preferred Option Off-street Cycle Track Speed differential between users Existing usage patterns Sight Lines Right Turn Conflicts Facility Continuity

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

50 River Street Existing Cross Section

51 River Street Proposed Cross Section

52 Western Avenue Existing Cross Section

53 Western Avenue Proposed Cross Section

54 Western Avenue Proposed Design

55 Western Avenue/Memorial Drive Shared Option Separated Option

56 Western Avenue/Soldiers Field Road Shared Option Separated Option

57 River Street/Soldiers Field Road Shared Option

58 River Street/Soldiers Field Road Separated Option

59 River Street/Memorial Drive

60 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

61 Anticipated Regulatory Requirements Section 106 of National Historic Preservation Act (NHPA) Massachusetts Environmental Policy Act (MEPA) and regulations at 310 CMR MA Wetlands Protection Act Order of Conditions Boston and Cambridge Conservation Commissions Clean Water Act : Army Corps Permit and MassDEP Water Quality Certificate MA DCR Construction Access Permit MWRA 8(m) Permit

62 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.

63 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 the Charles River Basin as recreational and scenic amenity. 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.

64 To submit comments or request more information, please contact: Thomas Broderick, P.E., Acting 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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