North Washington Street Bridge Project Boston, Massachusetts 25% Preliminary Design Public Hearing December 16, 2015

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1 North Washington Street Bridge Project Boston, Massachusetts 25% Preliminary Design Public Hearing December 16,

2 Introduction City of Boston: Para Jayasinghe, City Engineer Mass DOT: Michael O Dowd, Project Manager

3 Project Team City of Boston Mass DOT Highway Division Federal Highway Administration Bridge Engineer: Benesch Bridge Architect: Rosales + Partners Public Involvement Specialist: Howard Stein Hudson 3

4 Existing Bridge CHARLESTOWN BOSTON HARBOR NORTH END LOVEJOY WHARF 4

5 Existing Bridge Context CHARLES RIVER Project Limits Project Limits NORTH END CHARLESTOWN BOSTON HARBOR 5

6 Project History 1898 Existing Bridge Constructed - 12 spans, 1087 in Length 1956 Bridge is Reconstructed 1961 Swing Span Closed Permanently 1977 Elevated Street Railway Structure Removed 1992 Adjoining Warehouse Bridge Structure in Charlestown is Replaced 2003 Center Truss Bay Lanes Closed Ongoing Maintenance and Repairs 6

7 Existing Bridge 7

8 Existing Bridge 8

9 Existing Bridge 9

10 Project Goals Replacement of Structurally Deficient Bridge Multi-Modal Bridge as a Complete City Street over Water Improvements to Deficient Bike and Pedestrian Accommodations Improvements to Intersections Safety and Functionality Improvements to Navigation Channel Context Sensitive Bridge Design in Important Waterfront and Historic Bridge Location Visually Appealing Bridge Design Complementing the Zakim Bridge 10

11 Proposed Bridge Design Philosophy Form Iconic (Zakim Bridge) vs. Iconic-lite (Charlestown Bridge) Function Interstate Highway (Zakim Bridge) vs. City Street over water (Charlestown Bridge) 11

12 Bridge Type Study Alternatives Double Steel Arch Alternative Single Diagonal Steel Arch Alternative Hammerhead Piers Alternative V-Shape Piers Alternative 12

13 Bridge Type Study Alternatives Double Steel Arch Alternative Single Diagonal Steel Arch Alternative Hammerhead Piers Alternative V-Shape Piers Alternative 13

14 Comprehensive Bridge Type Study Bridge Type Selection Criteria Constructability Initial Construction Cost Life Cycle Maintenance Cost Structural Considerations Bridge Aesthetics Context Sensitive Considerations Environmental / Permitting 14

15 History of Public Outreach Meeting with DCR and Coast Guard: Spring 2014 City of Boston Interdepartmental Briefing Including Boston Landmarks Commission: Summer 2014 Charlestown Neighborhood Community Meeting: Fall of 2014 North End Neighborhood Community Meeting: Fall of 2014 Bicycle and Pedestrian Advocacy Groups Meeting Including Walk Boston, Livable Streets, and MassBike: Fall of 2014 Charlestown Preservation Society: Winter of 2015 Stakeholders Meetings Include Marriott Hotel, Constitution Marina, and Downtown North Association: Spring of 2015 A Better City Transportation Committee : Spring of 2015 Friends of City Square Park: Fall of

16 Form - Zakim Bridge 16

17 Form Existing Charlestown Bridge 17

18 Form - Proposed Bridge Aerial View 18

19 Form - Proposed Bridge Elevation View 19

20 Function Zakim Bridge 20

21 Function - Proposed Bridge Livable Walkable Green / Sustainable Multimodal 21

22 Context Plan with Proposed Bridge Project Limits Project Limits 22

23 Proposed Bridge Elevation Constant Depth Trapezoidal Steel Box Superstructure Five Sets of Concrete V Piers Substructure Main Span 190 Feet Overall Length 1,087 Feet 23

24 Existing Bridge Cross Section at Approach Spans Plate Girder Bridge Granite Historic Piers

25 Existing Bridge Cross Section at Navigation Span Swing Movable Span Steel Truss

26 Proposed Bridge Cross Section at Approach Spans Wide Sidewalks Separated Bike Lanes Two Vehicular Lanes in Each Direction

27 Pedestrian Overlooks Architectural Trellis and Plantings Proposed Bridge Cross Section at Navigation Span

28 Proposed Bridge Pier Detail

29 Proposed Bridge Pier Detail Mesh Screen Detail 29

30 Elevation of Architectural Trellis 30

31 Roadway and Pedestrian Lighting Light Fixture 31

32 Pedestrian Railing 32

33 Suggested Themes for Interpretive Signage CUSTOM HOUSE TOWER BOSTON GARDEN ZAKIM BRIDGE OLD NORTH CHURCH U.S. CONSTITUTION BUNKER HILL MONUMENT 33

34 Vehicular Barrier 34

35 3D Visualizations 35

36 Harbor Walk View 36

37 Harbor View 37

38 Pedestrian View 38

39 Pedestrian View 39

40 Motorist View 40

41 Motorist View 41

42 Pedestrian View at Overlook 42

43 Pedestrian View at Overlook 43

44 Pedestrian View at Grade Separated Walkway 44

45 Proposed Bridge Underside View 45

46 Proposed Bridge Night Elevation View 46

47 Connectivity Improvements 47

48 City Square Intersection Improvements PAUL REVERE PARK CITY SQUARE PARK 48 48

49 Keany Square Intersection Improvements NORTH WASHINGTON STREET 49

50 Detailed Plan at Paul Revere Landing Park NORTH WASHINGTON STREET 50

51 Detail Plan at Grade Separated Walkway NORTH WASHINGTON STREET 51

52 Grade Separated Walkway Elevation 52

53 Grade Separated Walkway Pier Detail 53

54 Comparison Before and After Views Before 54

55 55 After

56 Before 56

57 57 After

58 Before 58

59 59 After

60 Permitting FHWA is Lead Agency U.S. Coast Guard U.S. Army Corps of Engineers Individual Permit Massachusetts Coastal Zone Management (CZM) National Marine Fisheries Service (NMFS)/Essential Fish Habitat Assessment (EFH)/Section 7 Consultation FHWA - Categorical Exclusion Determination (CE Checklist) FHWA - Section 4(f) de Minimis Impact to Park and Recreation Lands FHWA - Section 106 National Historic Preservation Act - Coordination with State Historic Preservation Officer and Boston Landmarks Commission MassDEP - Section 401 Water Quality Certification Water Quality Data Form (WQDF)/Stormwater Management Early Environmental Coordination Checklist (EECC) 60

61 Construction Sequence and Traffic Impacts NORTH END CHARLESTOWN Project Limits BOSTON HARBOR Existing 61

62 Construction Sequence and Traffic Impacts NORTH END CHARLESTOWN Project Limits BOSTON HARBOR Stage 1A 62

63 Construction Sequence and Traffic Impacts NORTH END CHARLESTOWN Project Limits BOSTON HARBOR Stage 1B 63

64 Construction Sequence and Traffic Impacts Stage 1B Detour 64

65 Construction Sequence and Traffic Impacts NORTH END CHARLESTOWN Project Limits BOSTON HARBOR Stage 2 65

66 Construction Sequence and Traffic Impacts NORTH END CHARLESTOWN Project Limits BOSTON HARBOR Stage 3 66

67 Construction Sequence and Traffic Impacts NORTH END CHARLESTOWN Project Limits BOSTON HARBOR Stage 4A 67

68 Construction Sequence and Traffic Impacts NORTH END CHARLESTOWN Project Limits BOSTON HARBOR Stage 4B 68

69 Construction Sequence and Traffic Impacts NORTH END CHARLESTOWN Project Limits BOSTON HARBOR Final 69

70 Right - Of - Way Impacts Lovejoy Wharf Boston Inner Harbor North Washington Street Proposed Permanent Easement Prince Street Park Proposed Temporary Easement 70

71 Right - Of - Way Impacts Boston Inner Harbor North Washington Street Proposed Permanent Easement Proposed Temporary Easement 71

72 Right - Of - Way Impacts Boston Inner Harbor Paul Revere Park North Washington Street Proposed Permanent Easement Proposed Temporary Easement Constitution Marina 72

73 Right - Of - Way Impacts Paul Revere Park Rutherford Avenue Proposed Permanent Easement Proposed Temporary Easement 73

74 Fender System and Navigational Channel Boston Inner Harbor Vertical Clearance = 22.4 to MHW 2- Separated Channels Existing Fender System 74

75 Fender System and Navigational Channel Boston Inner Harbor Vertical Clearance = 22.4 to MHW (Center 80 ) Proposed Navigational Channel Proposed Fender System 75

76 Project Progress and Schedule Completed Conceptual Design: Spring 2015 Preliminary Design: Fall 2015 Environmental Permits: 2015 to 2016 Final Design: Winter 2016 Anticipated Construction Activity: 2017 to

77 Chief Engineer: Patricia A. Leavenworth, P.E. Project File No MassDOT- Highway Division 10 Park Plaza Boston, MA Public Outreach: Elizabeth Flanagan, Public Involvement Specialist Howard Stein Hudson Contact 77

78 Thank you Q & A North Washington Street Bridge Replacement Project Boston, Massachusetts 78

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