Rockingham (Bellows Falls) BO 1442(41) Alternatives Presentation - - PowerPoint PPT Presentation

Rockingham (Bellows Falls) BO 1442(41) Alternatives Presentation Meeting

TH-448 (Depot Street) – Bridge #53 over the Power Dam Canal

November 27, 2018

Introductions

Laura Stone, P.E.

VTrans Scoping Engineer

Todd Sumner, P.E.

VTrans Project Manager

Purpose of Meeting

• Provide an understanding of our approach to the

project

• Provide an overview of project constraints
• Discuss alternatives that were considered
• Discuss our recommended alternative
• Provide an opportunity to ask questions and voice

concerns

Location Map

Bridge 53 Project Location Bridge 52 Location

Meeting Overview

• VTrans Project Development Process
• Project Overview

– Existing Conditions – Alternatives Considered – Recommended Alternative

• Maintenance of Traffic
• Schedule
• Summary
• Next Steps
• Questions

VTrans Project Development Process

Project Definition Project Design Construction Project Funded Project Defined Contract Award

• Quantify areas of

impact

• Environmental

permits

• Develop plans,

estimate and specifications

• Right-of-Way

process if necessary

Initiated

• Identify resources &

constraints

• Evaluate alternatives
• Public participation
• Build Consensus

Who are you representing?

A. Municipal Official B. Resident C. Local Business D. School E. Emergency Services F. Independent Organization G. Press H. Other

How often do you use this segment of Depot Street?

A. Daily B. Weekly C. Monthly D. Rarely E. Never

How often do you walk over the bridge?

A. Daily B. Weekly C. Monthly D. Rarely E. Never

How often do you bike over the bridge?

A. Daily B. Weekly C. Monthly D. Rarely E. Never

What is your reason for attending this meeting?

A. Specific Concern B. General Interest C. Live in Close Vicinity D. Other

Existing Conditions – Bridge #53

• Roadway Classification – Local Road – Class 3 TH
• Bridge Type – 112’ long concrete arch
• Ownership – Town of Rockingham
• Constructed in 1909

Looking East over Bridge

Existing Conditions - Bridge #53

• Culvert Rating

4 (Poor)

– Significant spalling and exposed rebar

Arch Deterioration

Existing Conditions - Bridge #53

• Historic Resources
• Hazardous Waste Contaminated soils
• Utilities
• Railroad crossing

Looking West over Bridge - Resources

Existing Conditions - Bridge #53

• Hazardous Waste Contaminated soils

Hazardous Waste

Existing Conditions

• ADT of 530
• DHV of 100
• % Trucks: 11
• Design Speed of 25 mph
• Utilities
• Historic Resources
• Hazardous Waste
• Railroad Crossing

Design Criteria and Considerations – Depot Street Bridge

• No Action

– Additional maintenance required within 10 years

• Permanent Bridge Closure

– Arch would be closed to traffic and rehabilitated for pedestrian use only – Would not be eligible for future Town Highway Bridge funding

• Arch Rehabilitation

– Would need extensive work to the foundation of the arch – Concrete removal and patching of spandrel walls and the arch ring – Bridge would not be brought up to current HL-93 design loads – 20 year design life

• Full Bridge Replacement On-Alignment with new Arch

– Arch with similar characteristics of existing bridge – Current Typical section would be maintained (11’/4’ with sidewalk)

Alternatives Considered – Bridge #53

• New Steel Beam Bridge Off Alignment

– New bridge constructed 450 north west of existing bridge – Remaining 2-way segment up to bridge would be converted to 1-way

Alternatives Considered – Bridge #53 CONT.

– Utility Relocation Avoided – Hazardous Waste Impacts avoided

• New Bridge at Bridge Street Location

– New bridge constructed at Bridge 52 location – This would leave the more historically significant arch in place for pedestrian use only

Alternatives Considered – Bridge #53 CONT.

– Utility Relocation is easier at this site – more room for relocation – Avoids railroad flaggers – Hazardous Waste Impacts avoided – Better turning movements for trucks and busses

Recommended Alternative - Bridge #53

• Full Bridge Replacement ON Alignment with New Reinforced

Concrete Arch

– Closed Spandrel Elliptical Arch with similar dimensions to the existing bridge – Typical section will be maintained

• 11’/4’ Typical with a sidewalk

– 75 year design life

Typical Section

On Alignment Layout On Alignment Layout

• New arch matching existing for historic preservation
• 11/4 Typical Section with Sidewalk
• Hazardous Soils, Utilities, Railroad Flaggers

Off-Alignment Layout Off Alignment Layout

• Lined up with Canal Street
• 11/4 Typical Section with Sidewalk
• Depot Street Bridge closed to motorized traffic

Proposed Profile

• Match Existing

Maintenance of Traffic Options Considered

• Off Site Detour
• Existing Bridge for Off Alignment Option
• Temporary Bridge

Road Closure

• 120 day road closure

• Detour Route: Depot Street, to Island Street, Bridge Street, Square,

Rockingham Street, and Canal Street, back to Depot Street

– 0.9 miles end-to-end

Offsite Detour – Bridge #53

• Pedestrian Route: Depot Street,

to Island Street, Bridge Street, Square, and Canal Street, back to Depot Street

– 0.5 miles end-to-end

What would be the maximum acceptable length of closure for Bridge #53?

• A. 8 weeks
• B. 12 weeks
• C. 16 weeks
• D. 18 weeks
• E. 20 weeks
• F. 24 weeks

Temporary Bridge

• One lane Temporary Bridge
• Utilities could be moved to temporary during construction
• Would Require Right-of-Way

Temporary Bridge Layout

Recommended Scope

• Full Bridge Replacement with Reinforced Concrete Arch ON

Alignment with Traffic Maintained on Offsite Detour

– Closed Spandrel Elliptical Arch with similar dimensions to the existing bridge – 120 day road closure

• Separate Pedestrian Route signed

– Typical section will be maintained

• 11’/4’ Typical with a sidewalk

– 75 year design life – Right-of-Way needed – Extensive Utility Relocation needed – Impacts to contaminated soils – Pavement should be extended past the railroad crossing

• Railroad flaggers expected throughout construction duration

Rockingham (Bellows Falls) BO 1442(41)

Alt 1

Permanent Bridge Closure with Rehabilitation for Pedestrian Use

Alt 2

Arch Rehabilitation

Alt 3

Full Bridge Replacement: Reinforced Concrete Arch ON Alignment

Alt 4

New Steel Beam Bridge OFF Alignment

Alt 5

New Steel Beam Bridge at Bridge Street Location Off‐Site Detour

• a. Off‐Site

Detour

• b. Temporary

Bridge

• a. Off‐Site

Detour

• b. Temporary

Bridge Existing Bridge Off‐Site Detour

Total Project Costs

(Including Utilities, ROW, & Engineering)

$772,882 $943,762 $1,444,635 $3,443,049 $4,078,389 $3,521,064 $4,112,570

Annualized Cost N/A $47,190 $72,230 $45,900 $54,380 $46,950 $54,830 Town Share $19,322 $23,600 $72,200 $172,200 $407,900 $352,100 $411,260 Project Development Duration 2 years 3 years 3 years 4 years 4 years 4 years 4 years Construction Duration 4 months 4 months 8 months 6 months 8 months 6 months 6 months Closure Duration (if applicable) Indefinite 90 days N/A 120 days N/A N/A 120 days Typical Section ‐ Bridge (feet) 5' sidewalk 4‐11‐11‐4 (30') with 5’ sidewalk 4‐11‐11‐4 (30') with 5’ sidewalk 4‐11‐11‐4 (30') with 5’ sidewalk 4‐11‐11‐4 (30') with 5’ sidewalk 4‐11‐11‐4 (30') with 5’ sidewalk

• ption

4‐11‐11‐4 (30') with 5’ sidewalk Traffic Safety N/A Posted Bridge Posted Bridge Improved Improved Improved Improved Horizontal Alignment No No No No No Shifted 450’ north No Bicycle Access No Change No Change No Change No Change No Change No Change Improved Utility Relocation Relocation Relocation Relocation Relocation Relocation Relocation ROW Acquisition Yes Yes Yes Yes Yes Yes

Yes

Design Life N/A 20 Years 75 Years

Alternatives Matrix

Preliminary Project Schedule

• Construction Start – 2023

– Total Cost Estimate: $3,443,049

• Estimated Town Share: $172,000

Which would you be most concerned about?

• A. Closure Duration
• B. Bridge Aesthetics
• C. Environmental Impacts
• D. Recreational Impacts
• E. Other
• F. Not really concerned

Which design aspect is the most important to you?

• A. Shoulder

width/bicycle accommodations

• B. Aesthetics - Bridge

Railing

• C. Construction year
• D. Construction Duration
• E. Cost
• F. Other

Did you find this presentation to be?

• A. Too technical in nature
• B. Too simplified
• C. Just about right
• D. Not much use at all

Do you find the recommended scope of work satisfactory?

• A. Yes
• B. No

This is a list of a few important activities expected in the near future and is not a complete list of activities.

Wait for Town response to recommendation on proposed project

• Develop Conceptual plans and distribute for comment
• Request a Public Information meeting
• Process local agreements
• Right-of-Way process (if needed)
• Town is responsible for any chosen detour route

Next Steps – Bridge #53

Rockingham (Bellows Falls) BO 1442(41) Questions and Comments

TH-448 (Depot Street) – Bridge #53 over the Power Dam Canal

November 27, 2018