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Enosburg BRO 1448(40) Bridge 48 on TH 2 Over the Tyler Branch Alternatives Presentation

Enosburg BRO 1448(40) Bridge 48 on TH 2 Over the Tyler Branch Alternatives Presentation. PROJECT LOCATION. TH 47 BR 46. Meeting Outline. Purpose of the Meeting Structures Section re-organization Existing bridge deficiencies Alternatives considered Summary and recommendation-.

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Enosburg BRO 1448(40) Bridge 48 on TH 2 Over the Tyler Branch Alternatives Presentation

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  1. Enosburg BRO 1448(40) Bridge 48 on TH 2 Over the Tyler Branch Alternatives Presentation

  2. PROJECT LOCATION TH 47 BR 46

  3. Meeting Outline • Purpose of the Meeting • Structures Section re-organization • Existing bridge deficiencies • Alternatives considered • Summary and recommendation-

  4. Purpose of Meeting • Present the alternatives that we have considered • Explain the constraints to the project • Help you understand our approach to the project • Provide you with the chance to ask questions. • Provide you with the chance to voice concerns • Build consensus for the recommended alternative -

  5. Phases of Development • Project • Funded • Project • Defined • Contract • Award Project Definition • Project Design • Construction • Identify resources & constraints • Evaluate alternatives • Public Participation • Build Consensus • Quantify areas of impact • Environmental permits • Right-of-Way Process • Utility Coordination • Develop plans, estimate and specifications

  6. Accelerated Bridge Program • Began in January 2012 • Bridges are deteriorating faster than we can fix them • Accelerated Bridge Construction (ABC) is key • Impacts to property and resources is minimized • Standard details repeated on many projects • Shift from individual projects to programmatic approach • Accelerated Project Delivery • Goal of 2 year design phase for ABP (5 years conventional) • Goal of 25% of projects into Accelerated Bridge Program-

  7. Project Initiation & Innovation Team • Part of re-organization in January 2012 • Currently team of 5 • All projects will begin in the PIIT • Very efficient process • Look for innovative solutions whenever possible • Involved until Project Scope is defined • Hand off to PM to continue Project Design phase -

  8. Project Background • Priority 20 in the Town Highway Bridge Program • The structure is owned and maintained by the Town • TH 2 is a Class 2 Town Highway • Existing bridge is a single-span steel beam bridge with a concrete deck (replaced with temporary Mabey bridge) • Span of 47 feet and width of 18 feet • The bridge was built in 1924 • Bridge is structurally deficient and has a Federal sufficiency rating of 9.0 (out of 100) -

  9. Project Background (Cont) • Traffic Data • Design speed = 50 mph (Note: 4 way stop proposed)

  10. Description of Terms Used Beams (Superstructure) Bridge Rail Deck Abutment (Substructure)

  11. EXISTING BRIDGE DEFICIENCIES • Deficiencies • The deck, superstructure and substructure are in critical to poor condition • The bridge width does not meet the current standard. • Inspection Report Information (Based on a scale of 9) • Deck Rating 3 Critical • Superstructure Rating 4 Poor • Substructure Rating 4 Poor • Channel Rating 5 Fair

  12. Width of Bridge 18’

  13. Bridge Side View

  14. Existing Site Conditions • Bridge Width (Face-Face Rail) = 18’-0” • Design Speed Limit = 50 mph (Note: 4 way stop) • No Postings for Weight Restriction • Overhead Utilities present (cross over bridge)-

  15. Layout Showing Constraints

  16. Proposed Project • Complete bridge replacement warranted • Use 10’ lanes w/ 2’ shoulders (24’ rail-rail width) • Approximately 48’ span • Improved intersection w/ 4 way stop -

  17. Alternatives • Full replacement w/ abutments on bedrock

  18. Proposed Bridge Typical

  19. Alternative 1

  20. Alternative 1 Profile

  21. Bridge Closure Details • 4 week closure specified in contract • Timing of closure will be made w/ input from Town (to minimize community impacts) • Town responsible for detour route (location, signing, installing, maintaining) • One route adds 3 miles and is 11 miles end-end • Local share cut in half w/ closure-

  22. Alternatives Matrix

  23. Questions

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