Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and...
Transcript of Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and...
![Page 1: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/1.jpg)
Lake Champlain Bridge Project
Public MeetingOn New Bridge Design Concepts
and Commemorating the Old Bridge
December 12, 2009
![Page 2: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/2.jpg)
Public Meeting Agenda1. Welcome2. What is the purpose of this meeting?3. Summary of project status4. New bridge criteria and concepts5. Ways to commemorate the historic bridge6. Your input
![Page 3: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/3.jpg)
Public Meeting Agenda1. Welcome2. What is the purpose of this meeting?3. Summary of current status4. New bridge criteria and concepts5. Ways to commemorate the historic bridge6. Your input
![Page 4: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/4.jpg)
Public Meeting Purpose1. To share information about bridge features and
design criteria and to illustrate and explain sixbridge concepts that would work for the Lake Champlain crossing.
2. To share some ideas about commemoration of the old bridge, both at the actual demolition and for future generations.
3. To get YOUR input about both of these actions.
![Page 5: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/5.jpg)
Public Meeting Agenda1. Welcome2. What is the purpose of this meeting?3. Summary of current status4. New bridge criteria and concepts5. Ways to commemorate the historic bridge6. Your input
![Page 6: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/6.jpg)
Why do this so quickly and in December?
• Normally public meetings are never held in December, but this project is a “horse of a different color”
• Getting a new bridge built and open-to-traffic is a top priority of both states
• The design team cannot begin bridge design until a concept is decided upon
• Both states desire, and the approval process requires, that the public be consulted
![Page 7: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/7.jpg)
Project Status Changes
Before October 16:• Project scoping process• Multiple alternatives• Environmental Impact Statement• Five+ year process to completion
……..but the bridge had other ideas….
![Page 8: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/8.jpg)
Project Status Changes
After completion of engineering assessment and significant public input:
• Bridge cannot be repaired or rehabilitated• Local input has been clear that only a bridge in
the same location can meet local needs• Only one alternative remains:
– Demolish existing bridge, and– Replace with new bridge on existing alignment
![Page 9: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/9.jpg)
Project status changes
• National Environmental Policy Act (NEPA) is a requirement
• 3 options of increasing complexity– Categorical Exclusion (CE)– Environmental Assessment (EA)– Environmental Impact Statement (EIS)
• Original project was to be an EIS• Project is now a Documented CE (DCE)• DCE process considerably shorter and less
complex
![Page 10: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/10.jpg)
Project Status Changes• All processes will be accelerated as quickly as
possible– Section 106 consultation (consulting parties)– Other regulatory compliance– Permitting
• Agencies that need to be consulted have been alerted to the urgency of this project
• Agencies have pledged speedy response• Goal is to open new bridge to traffic summer of
2011
![Page 11: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/11.jpg)
Four separate concurrent processes
1. Construction of new ferry facilities2. Demolition of existing bridge3. New bridge design/construction4. Commemoration of the old bridge
……..this meeting is about the new bridge and commemoration of the old bridge
![Page 12: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/12.jpg)
What we need from you today
• Hear our presentation• Please visit the information stations
– 3 stations on new bridge design concepts– 1 station on ways to commemorate the old bridge– 1 station on new ferry and bridge demolition status– 1 children’s station
• Please read our handout and survey form• Complete the survey form and return to us today
![Page 13: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/13.jpg)
Following public input
• Process– PAC recommendation– Section 106 process input continues
• New bridge– Decision by NY and VT on bridge concept– Detailed design begins immediately
• Commemorating the old bridge– Public notification of demolition schedule and “events”– Preliminary decisions on ways to commemorate the old bridge
(to mitigate the impact of losing this historic resource)
![Page 14: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/14.jpg)
Public Meeting Agenda1. Welcome2. What is the purpose of this meeting?3. Summary of current status4. New bridge criteria and concepts5. Ways to commemorate the historic bridge6. Your input
![Page 15: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/15.jpg)
• Co-Founder Fay, Spofford and Thorndike • “significantly influenced future continuous truss highway bridge design
in the areas of technology, aesthetics, and construction methods.”1
• Author - Theory of Continuous Structures and Arches (1937)• Early Pioneer of Continuous Truss Design
1Casella, Richard M., “National Historic Context and Significance of the General Sullivan Bridge, Dover, New Hampshire,” October 2005, p. 1.
Designer Charles M. Spofford
![Page 16: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/16.jpg)
Bridge Design Innovations• Early Example of Continuous
Truss– 1st Long Span Continuous Bridge for
Highway Traffic
• Unique & Iconic Form– “The layout of the Lake Champlain
Bridge is most ingenious.”1
– “A significant advancement in the technology and aesthetics of continuous highway bridge design …It was a highly innovative and aesthetic design…”2
1Abbett, Robert W., “Discussion of Lake Champlain Bridge”, Transactions of the American Society of Civil Engineers, 1933, p. 654.
2Casella, Richard M., “National Historic Context and Significance of the General Sullivan Bridge, Dover, New Hampshire,” October 2005, p. 1.
![Page 17: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/17.jpg)
Unusual Aspects of the LCB
• Unreinforced concrete piers– Slender proportions
• No protection against ice abrasion
• Iron-ore tailings used in concrete• Caisson concreting without tremie
– Patented drop-bottom bucket
Iron Ore Tailings – Mineville, NY
General Sullivan Bridge (1934)Dover, New Hampshire
![Page 18: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/18.jpg)
Why Bridge Replacement?• Pier Deterioration
– Pier Freeze Thaw Damage– Strength Degradation– Pier cracking below waterline– Rapid Increase in last 4 years
![Page 19: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/19.jpg)
Why Bridge Replacement?• Ice / Wind / Thermal Loading
– Ice Thrust
• Restrained Thermal Movement– Frozen Bearings
Pier Deterioration
![Page 20: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/20.jpg)
Design Requirements• The Replacement Bridge:
– Meet Modern Design Codes– Ensure Load Redundancy
• Avoid Progressive Collapse• Reduced Maintenance &
Inspection
– Enhanced Service Life• All Key Elements Replaceable
– Be SAFER than the original
![Page 21: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/21.jpg)
Design Requirements• To meet or exceed the existing structure functionality
– 2 vehicle lanes, 12’-0” lane width– 2 wider shoulders– Aesthetically pleasing structure
• Meet current loading and clearance requirements– Over 17’-0” vertical vehicular clearance– 75’-0” vertical navigational clearance
• Meets replica Lois McClure mast height• Exceeds Rouse’s Point vertical clearance
• Minimum 75-year service life
![Page 22: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/22.jpg)
Additional Bridge Considerations• Community Input:
– Bicycle and Pedestrian Facilities• Sidewalks• Observation Area
– Feature Lighting– Bridge Aesthetics
• Form & Scale• Important Viewsheds• Character
![Page 23: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/23.jpg)
Shoulder & Sidewalk Transition
![Page 24: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/24.jpg)
Conceptual Bridge TypesSteel Girder Segmental Box
Steel Cable Stayed Extradosed
Network Arch Modified Network Arch
![Page 25: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/25.jpg)
Conventional Truss• Majority of main members
fracture critical• High life cycle costs –
Inspection & Maintenance• Vulnerable to progressive
collapse
Lattice Truss• See also Conventional Truss• True arch configuration – Large
lateral loads in poor soil• Difficult to Construct
Concrete Arch• Large lateral loads in poor soil at
anchorage• Long construction schedule• Complex construction that
requires significant temporary works
Suspension• Inefficient for short spans – high cost of
cable erection and anchorage construction
• Large lateral loads in poor soil at anchorages
• Long construction schedule• High risk for schedule delays• Very high initial cost
Fin Back• Similar to cable-stayed bridge, no distinct advantages• Requires center tower configuration and segmental box
construction• Significant structure depth steep approach angles• Additional width inefficient, median barrier not required• Very high initial cost
Conceptual Bridge Types - Dismissed
![Page 26: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/26.jpg)
Conceptual Bridge Type – Steel Girder
Pros ConsLowest initial cost Less visually pleasingShortest construction time, familiarity Difficult to make 75’ vertical clearanceHigh degree of redundancy Deep structure depthMin. cold weather construction impactReplaceable deckLighter structure, smaller foundations
![Page 27: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/27.jpg)
Conceptual Bridge Type – Steel Girder
![Page 28: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/28.jpg)
Conceptual Bridge Type – Steel Girder
![Page 29: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/29.jpg)
Conceptual Bridge Type – Steel Girder
![Page 30: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/30.jpg)
Conceptual Bridge Type – Steel Girder
![Page 31: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/31.jpg)
Conceptual Bridge Type – Steel Girder• Steel plate or steel box girder with concrete deck
![Page 32: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/32.jpg)
Conceptual Bridge Type – Concrete Segmental
Pros ConsHigh quality precast segmental construction
Heaviest structure, largest foundationsCold weather schedule impacts to constructionNon-replaceable deckMaintenance costs (overlays)
Less visually pleasingDifficult to meet 75’ vertical clearance
![Page 33: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/33.jpg)
Conceptual Bridge Type – Concrete Segmental
![Page 34: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/34.jpg)
Conceptual Bridge Type – Concrete Segmental
![Page 35: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/35.jpg)
Conceptual Bridge Type – Concrete Segmental
![Page 36: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/36.jpg)
Conceptual Bridge Type – Concrete Segmental
![Page 37: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/37.jpg)
Conceptual Bridge Type – Concrete Segmental• Cast-in-place or precast concrete box girder
![Page 38: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/38.jpg)
Conceptual Bridge Type – Cable-Stayed
Pros ConsVisually pleasing High initial costLight weight superstructure Maintenance costs (overlays)Efficient use of materials Non-replaceable deck
Less efficient for spans under 600’
![Page 39: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/39.jpg)
Conceptual Bridge Type – Cable-Stayed
![Page 40: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/40.jpg)
Conceptual Bridge Type – Cable-Stayed
![Page 41: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/41.jpg)
Conceptual Bridge Type – Cable-Stayed
![Page 42: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/42.jpg)
Conceptual Bridge Type – Cable-Stayed
![Page 43: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/43.jpg)
Conceptual Bridge Type – Cable-Stayed• One or more towers with cables supporting bridge deck
![Page 44: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/44.jpg)
Conceptual Bridge Type – Concrete Extradosed
Pros ConsVisually pleasing Highest initial cost
Maintenance costs (overlays)Less efficient for spans under 600’Longest construction time
![Page 45: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/45.jpg)
Conceptual Bridge Type – Concrete Extradosed
![Page 46: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/46.jpg)
Conceptual Bridge Type – Concrete Extradosed
![Page 47: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/47.jpg)
Conceptual Bridge Type – Concrete Extradosed
![Page 48: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/48.jpg)
Conceptual Bridge Type – Concrete Extradosed
![Page 49: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/49.jpg)
Conceptual Bridge Type – Concrete Extradosed• One or more towers with cables supporting bridge deck
![Page 50: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/50.jpg)
Conceptual Bridge Type – Network Tied Arch
Pros ConsEnhanced redundancy & safety Complex arch fabricationEfficient use of steelVisually pleasingReplaceable deckLight weight superstructureFloat in construction for arch
![Page 51: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/51.jpg)
Conceptual Bridge Type – Network Tied Arch
![Page 52: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/52.jpg)
Conceptual Bridge Type – Network Tied Arch
![Page 53: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/53.jpg)
Conceptual Bridge Type – Network Tied Arch
![Page 54: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/54.jpg)
Conceptual Bridge Type – Network Tied Arch
![Page 55: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/55.jpg)
Conceptual Bridge Type – Network Tied Arch• Tied arch with inclined hangers
![Page 56: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/56.jpg)
Conceptual Bridge Type – Modified Network Tied Arch
Pros ConsEnhanced redundancy & safety Complex arch fabricationEfficient use of steelVisually pleasingReplaceable deckLight weight superstructureFloat in construction for arch
![Page 57: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/57.jpg)
Conceptual Bridge Type – Modified Network Tied Arch
![Page 58: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/58.jpg)
Conceptual Bridge Type – Modified Network Tied Arch
![Page 59: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/59.jpg)
Conceptual Bridge Type – Modified Network Tied Arch
![Page 60: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/60.jpg)
Conceptual Bridge Type – Modified Network Tied Arch
![Page 61: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/61.jpg)
Conceptual Bridge Type – Innovation
• Cable Stayed / Extradosed – Balanced cantilever construction– Highly efficient use of steel– Enhanced design redundancy
• Network Tied Arch– Innovative structural form
• Efficient use of steel– Modern version of the truss– All cables are replaceable– Enhanced design redundancy
![Page 62: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/62.jpg)
Summary• Survey
– Bridge Features– Bridge Concepts
![Page 63: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/63.jpg)
Public Meeting Agenda1. Welcome2. What is the purpose of this meeting?3. Summary of current status4. New bridge criteria and concepts5. Ways to commemorate the historic bridge6. Your input
![Page 64: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/64.jpg)
How can we commemorate the old bridge?
• Now: marking the passing of the bridge at t the demolition “event”
• Later: For future generations
![Page 65: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/65.jpg)
Marking the passing of the old bridge
• Develop plan for the event• Announce widely• Public viewing of demolition (from afar!)• Other possibilities:
– Some type of “ceremony” before demolition??– Your ideas??
![Page 66: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/66.jpg)
Commemorating the bridge for future generations• Historic American Engineering Record documentation• Permanent local museum display? (where?)• Oral and written memories by residents• Documentary on the bridge• Interpretive roadside display near Crown Point or
Chimney Point historic sites? • Development of “popular history” document to be
distributed to local schools and libraries?• Development of permanent historic website?• Salvage and display pieces of the bridge• Other ideas???
![Page 67: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/67.jpg)
Public Meeting Agenda1. Welcome2. What is the purpose of this meeting?3. Summary of current status4. New bridge criteria and concepts5. Ways to commemorate the historic bridge6. Your input
![Page 68: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/68.jpg)
What we need from you today
• Hear our presentation• Please visit the information stations
– 3 stations on new bridge design concepts– 1 station on ways to commemorate the old bridge– 1 station on the new ferry facility and bridge demolition– 1 children’s station
• Please read our flyer and survey form• Complete the survey form and return to us today
![Page 69: Lake Champlain Bridge Project...Dec 12, 2009 · 1. To share information about bridge features and design criteria and to illustrate and explain six bridge concepts that would work](https://reader034.fdocuments.us/reader034/viewer/2022052612/5f0e65747e708231d43f0b69/html5/thumbnails/69.jpg)
Your turn
You are welcome to make comments now…but…..• Please visit our information stations and talk with
staff from NYSDOT, VAOT and the consulting team
…and……• Please fill out the survey form in your handout• Survey can also be taken on-line, but please
take it today!!