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May 11, 2017

Highgate BO 1448(43) Bridge 25 on TH 4 (Machia Road) Over Missisquoi River Development Review Board Meeting. May 11, 2017. Introductions. Douglas Bonneau, P.E. VTrans Structures Project Manager David Peterson, P.E. VTrans Project Engineer. PROJECT LOCATION. Meeting Outline.

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May 11, 2017

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  1. Highgate BO 1448(43)Bridge 25 on TH 4 (Machia Road)Over Missisquoi RiverDevelopment Review Board Meeting May 11, 2017

  2. Introductions Douglas Bonneau, P.E. VTrans Structures Project Manager David Peterson, P.E. VTrans Project Engineer

  3. PROJECT LOCATION

  4. Meeting Outline • Existing bridge information • Update Plans & Project Development Status • Next Steps • Questions

  5. Background Information • The structure is owned and maintained by the Town • Machia road is a Class 2 local road intersecting VT 78 • Funding is 80% Federal -15% State -5% Local • Functionally classified as a Rural local road • Posted Speed = 35 mph (Design Speed) • Existing bridge is a two span Thru Truss • Existing Bridge length = 292 feet (2 equal spans @ 143 feet) • Bridge Width = 16 feet +/- • The bridge was built in 1928 (89 years old)

  6. EXISTING BRIDGE DEFICIENCIES Inspection Rating Information (Based on a scale of 9) Bridge Deck Rating 5 Fair Superstructure Rating 4 Poor Substructure Rating 4 Poor Rating Definitions 9 Excellent 8 Very Good 7 Good 6 Satisfactory 5 Fair 4 Poor 3 Serious 2 Critical 1 Imminent Failure Deficiencies • The bridge is structurally deficient and unable to carry design loads • The bridge is functionally obsolete as it is too narrow for the roadway classification and design speed • The bridge railing and approach railing are substandard • The vertical and horizontal alignments are substandard

  7. Looking East at Bridge Approach

  8. Looking West at Bridge Approach

  9. East abutment showing signs of movement

  10. West abutment showing undermining

  11. Looking Downstream

  12. Looking Upstream

  13. Project Details • Complete bridge replacement • 2 spans @ 140’ – 140’ (280’ overall span length) • 28’ width between face of rail (per Town request) • Horizontal alignment will be improved using a straight bridge alignment • The new horizontal alignment also improves the intersection with VT 78 • Improves vertical alignment of roadway

  14. Proposed Roadway Typical Section

  15. Proposed Bridge Typical Section

  16. Layout of Proposed Bridge

  17. River Cross SectionsAbutment #1

  18. River Cross SectionsAbutment #2

  19. Traffic Maintenance • Existing bridge to remain open during most of the new bridge construction. • Short duration road closures for major construction activities. (e.g.- Truss bridge demolition, Approach roadway tie-in, paving operations etc.). (This maintains the integrity of the 5% funding share as well)

  20. Schedule • Construction is currently scheduled for 2018 • Construction could slip to 2019 : • ROW acquisition building removal utility relocation • Project is funded 80% Fed – 15% State – 5% Local

  21. Next Steps A few important activities expected in the near future. • Finish Final Plans and Design • Complete property acquisition/Right-of-Way • Demo apartment building under separate Contract • Relocation of Utilities • Advertise bridge project

  22. Questions Direct any questions to: Doug Bonneau, P.E. Douglas.Bonneau@Vermont.gov This presentation is available at the web address shown below https://outside.vermont.gov/agency/vtrans/external/Projects/Structures/98J378

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