Technical Presentation to City of Victoria Council June 14, 2010 - - PowerPoint PPT Presentation

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Technical Presentation to City of Victoria Council June 14, 2010 - - PowerPoint PPT Presentation

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Technical Presentation to City of Victoria Council June 14, 2010 With: Stafford Bandlow | Jonathan Yardley Architects | Wilkinson Eyre Architects | H.W. Lochner| Advicas Quantity Surveyors| Sharp and Diamond | CN Ryzuk & Associates

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Technical Presentation to City of Victoria Council June 14, 2010

With: Stafford Bandlow | Jonathan Yardley Architects | Wilkinson Eyre Architects | H.W. Lochner| Advicas Quantity Surveyors| Sharp and Diamond | CN Ryzuk & Associates

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Presentation Outline

  • Project Requirements

– Project Objectives – Seismic Considerations – Rail Considerations – Lane Considerations

  • Replacement Option
  • Rehabilitation Option
  • Technical Questions
  • Costs
  • Economic Impact
  • Summary

6/13/2010 2

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Project Objectives – 1

  • Replace or rehabilitate the JSB to provide for safe and

long-lasting infrastructure and as a traffic calmed corridor

  • Provide 2-lanes outbound and 1-lane inbound
  • Provide on-street bike lanes
  • Provide pedestrian walkway (south side)
  • Provide multi-use path (north side)
  • Provide dedicated rail crossing
  • Improve navigation channel to be in accordance with

current standards

6/13/2010 3

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Project Objectives – 2

  • Provide improved cycling/pedestrian/vehicular access at

bridge heads to minimize conflict & improve safety

  • Integration with existing and proposed pathways
  • Seismic performance to M8.5 earthquake
  • 100 year service life
  • Maintain traffic flow during construction (vehicles,

marine, pedestrians, bikes)

  • Meet historic guideline requirements including

“Standards and Guidelines for the Conservation of Historic Places in Canada” and “City of Victoria Old Town Guidelines”.

6/13/2010 4

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Seismic Considerations

  • 35% probability of major quake (M7.0 to M7.9) in

next 50 years

  • Recent earthquake in Washington (2001) was M6.8
  • Existing Johnson Street Bridge will collapse in less

than M6.5 earthquake (2009 Condition Assessment)

  • Point Ellice Bridge upgraded in 2001 to not collapse

in a M6.5 earthquake but repairs would be needed. No Emergency Access after M6.5.

  • Required seismic performance driven by life safety,

disaster response, protection of investment, post- disaster economic recovery.

6/13/2010 5

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Seismic Considerations*

Seismic Design Category After M6.5 Earthquake After M8.5 Earthquake Lifeline No damage No collapse Repair needed Other No collapse Repair needed Replacement needed

6/13/2010 6

*Earthquake magnitudes (M) have been referenced rather than design seismic

events to provide a point of reference for non-technical audience

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Seismic Considerations

  • Recommendation: Replacement bridge be

designed for M8.5 earthquake

  • Recommendation: Rehabilitated bridge be

designed for M8.5 earthquake Note: Potential for loss of major investment if seismic performance is reduced below M8.5.

6/13/2010 7

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Railway Considerations

  • Base options for replacement & rehabilitation

include railway bridge with station on downtown side

  • Significant savings realized in all options if railway

terminated in Victoria West

  • Existing rail bridge could be converted to multi-use

trail with rehabilitation option

  • Replacement bridge could be narrowed
  • Corridor for potential future commuter rail should be

preserved

6/13/2010 8

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Roadway Bridge - Lane Considerations

  • Base options for replacement & rehabilitation

include 2 westbound and 1 eastbound lanes of traffic

  • Trip growth of at least 40% expected by 2026 per

Regional Growth Strategy & Travel Choices

  • Elimination of 1 westbound lane results in LOS F

with queuing/congestion past Government Street and past Yates Street

  • Emergency responders are concerned that lane

reductions and more congestion will increase response times.

6/13/2010 9

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SLIDE 10

Replacement Option

6/13/2010 10

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Replacement Option - Scope

multi-use trail with connection to Galloping Goose/ENR Trail Main bridge with 3 lanes, on street bike lanes, rail. Designed as a traffic calmed corridor. Pedestrian Sidewalk with connections to adjacent pathways Improved downtown approaches including sidewalks along west of Wharf St. Consolidated green space

6/13/2010 11

Elimination of “S” curve and install traffic signal Integration with Harbour Pathway Improved navigation channel in accordance with current regulations Establish trail head for Galloping Goose / Trans Canada Trail New Railway Station

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6/13/2010 12

Replacement Option - Scope

Road/Train/On-Street Bike Deck Sidewalk Multi-Use Trail 5.0 m 3 -3.0 m 1.8 m 1.8 m 5.0 m 2.5 m

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Replacement Option - Scope

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6/13/2010 14

Replacement Option - Scope

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  • New bridge to north of existing
  • “S” curve removed with new signal added at Harbour and

Esquimalt

  • 30 km/h retained and landscaping added to provide traffic

calming

  • Vehicle traffic flow maintained during construction (no

closures)

  • 2-lanes outbound; 1-lane inbound
  • On-street bike lanes
  • Pedestrian walkway (south side)
  • Multi-use pathway (north side)

6/13/2010 15

Replacement Option - Scope

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  • Dedicated rail crossing
  • Integration with existing pathways on east and

west

  • Upgraded navigation channel
  • No collapse after M 8.5 earthquake
  • 100 year design life
  • Meets historic / aesthetic guidelines

6/13/2010 16

Replacement Option - Scope

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Replacement Option – Schedule*

6/13/2010 17

Year Activity

2011 Complete design & tender 2012 Remove rail bridge & procure/fabricate long lead time components; foundations 2013 Continue construction 2014 Complete construction & open new bridge 2015 Remove old roadway bridge

* Based on conventional delivery (Design-Bid-Build)

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6/13/2010 18

Replacement Option – Staging

Under Construction 2011/2012 2013/2014 Early 2015

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Rehabilitation Option

6/13/2010 19

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Rehabilitation Option - Scope

New multi-use trail bridge with connection to Galloping Goose/ENR Trail Rehabilitated railway bridge Rehabilitated existing road bridge with improved deck for bikes; new sidewalk decking Establish trail head for Galloping Goose / Trans Canada Trail Existing railway station Existing “S” curve

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No dedicated on-street bike lanes Existing downtown approach roads with improved sidewalk along Wharf Street Green space remains “Land- Locked” (similar on east) Navigation channel width is limited by existing bridges

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6/13/2010 21

Rehabilitation Option - Scope

Road Deck, 3-3 m lanes Sidewalk 2.5m Rail Deck 5 m Multi-Use Trail Bridge 5 m

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Rehabilitation Option - Scope

6/13/2010 22

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Rehabilitation Option - Scope

6/13/2010 23

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Rehabilitation Option – Scope

  • New 5 m wide multi-use trail bridge to the north
  • Replace all electrical/mechanical systems
  • Upgrade road and railway bridges to withstand M8.5

earthquake

  • Repair corrosion and repaint for road and railway bridges
  • New non-skid riding surface on road bridge for on-street

bikes

  • Existing pedestrian walkway on south side of road bridge

improved with new non-slip deck

6/13/2010 24

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Rehabilitation Option - Scope

6/13/2010 25

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* Full closures of several month durations are anticipated for future rehabilitation works ** Assuming completion of construction in 2015

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Rehabilitation Option – Future Maintenance

Repair* Frequency Starting ** Paint touch-up and steel repairs 5 years 2020 Repaint and steel repairs 15 years 15 years 2030 Approach span concrete deck replacement Once 2035

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6/13/2010 27

Future Maintenance – Both Options

Repair Frequency of Repairs (years)

Replacement

Rehabilitation

Existing Bridges New Multi-Use Trail Bridge Annual Maintenance annually annually annually Engineering Inspections bi-annual bi-annual bi-annual Paint Touch-Up 10 5 10 Repairs to wearing surface 5 5

  • Electrical Mechanical Repairs
  • nce
  • nce
  • nce

Repaint 20 15 20 Approach Span deck replacement

  • nce
  • Repave

15 15

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Rehabilitation Option – Schedule*

6/13/2010 28

Year Activity

2011 Complete design & tender 2012 Procurement/fabrication of long lead time components, site preparation, foundations 2013 Construct new multi-use trail bridge and continue with upgrade to existing bridge foundations 2014 Rehabilitate railway bridge 2015 Rehabilitate road bridge Early 2016 Open

* Based on conventional delivery (Design-Bid-Build)

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6/13/2010 29

Rehabilitation Option – Staging

2011/2012 2013 2014 2015 Early 2016 Under Construction Detour

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Rehabilitation Option – Construction Impacts

  • Traffic limited to 2-lanes for 1 year with Multi-

Use Trail Bridge available for detour.*

  • Transit, commercial vehicles, trucks, pedestrian

& bike access reduced during construction * Note: 12 month full closure if Multi-Use Trail Bridge is not available for detour.

6/13/2010 30

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Technical Questions

6/13/2010 31

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Replacement Option ($ millions)

Cost Item 2008 Estimate Class “C” Estimate Difference Construction Items* Mobilization, site preparation, traffic management 1 3 +2 Demolition of existing bridges 3 3 New bridge 44 48 +4 Civil works (includes Telus duct, contaminated soil) 5 6 +1 Subtotal Construction 53 60 +7 Contingency (15%) 4 9 +5 Engineering 6 8 +2 Property 1 +1 Escalation, Financing, taxes 11 +11 Total Estimated Cost 63 89 +26

6/13/2010 32

* General conditions provided in detailed estimate distributed to other construction items to reflect bid numbers

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Replacement Option - Possible Cost Savings ($ millions)*

6/13/2010 33

Scope Class “C” Estimate Base Scope 89 Scope Changes: Delete railway related components (on capital costs) 12 Reduce seismic to M6.5 (NOT RECOMMENDED) 10 Reduced Scope at M8.5 77

* Includes all costs associated with construction, contingency, engineering, escalation, financing, Federal and Provincial taxes.

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Replacement Option – Cost of Delay

  • Previous estimate established when construction costs

were at a five year low (2008)

  • Window of opportunity closing on low construction prices
  • cost of materials, labour and transport are rising
  • Considerable uncertainty regarding future market

conditions (escalation of 12% per year from 2003-2008, escalation over the next 5 years ?)

  • $19 million of the $26 million cost increase due to delay

and includes escalation, financing and contingencies.

6/13/2010 34

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Replacement Option – Economic Impact

  • Very low economic impact as no major closures

6/13/2010 35

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Rehabilitation Option ($ millions)

6/13/2010 36

Cost Item MMM Class “C” Estimate Construction Items Mobilization, site preparation, traffic management 4 Structural (including painting) 25 Electrical/mechanical 14 New multi-use trail bridge 15 Multi-use trail paths and trail head 2 Detours 2 Subtotal construction 62 Contingency (25%) 14 Engineering 13 Property 1 Escalation, financing, taxes 13 Total Estimated Cost 103

* General conditions provided in detailed estimate distributed to other construction items to reflect bid numbers

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Rehabilitation Option - Possible Cost Savings ($ millions)*

6/13/2010 37

Scope Cost Base Scope 103 Scope Changes:

Delete multi-use trail bridge and detours but retain trail head improvements on downtown and Victoria West sides (will require full closure for 12 months)

25

Reduce seismic performance to M6.5 NOT RECOMMENDED

15

Terminate rail West of crossing and replace railway bridge deck to allow use as multi-use trail bridge.

2 Reduced Scope at M8.5 80

* Includes all costs associated with construction, contingency, engineering, escalation, financing, Federal and Provincial taxes

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Rehabilitation Option - Economic Impacts

  • 2-Lane open 12 months -$ 5 million

– For full scope rehabilitation option

  • Full closure 12 months - $ 13 million

– For reduced scope rehabilitation option

6/13/2010 38

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6/13/2010 39

Victoria Census Metropolitan Area Downtown Victoria Business Improvement Area Sales ($ millions) 15,000 1,200 GDP ($ millions) 11,700 930 Employment (numbers) 194,800 15,500

Economic Activity in 2009

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6/13/2010 40

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6/13/2010 41

Replacement Rehabilitation

Full Closure (12 months): Downtown Business Vehicle Diversion/Travel Time Bus Diversion Costs n/a n/a n/a 10.3 1.6 1.5 Two Lanes Open (12 months): Downtown Business Vehicle Diversion/Travel Time Bus Diversion Costs n/a n/a n/a 2.6 0.4 1.5

Economic Impacts ($ millions)

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6/13/2010 42

Summary - Comparison of Alternatives ($ millions)

Full Scope Replacement Rehabilitation Full Scope, Total Project Cost 89 103 Life cycle cost in $2010 22 48 Present value of life cycle costs* 4 12 Schedule with full scope 4 years 5 years Economic impact with full scope N/A 5 Reduced Scope Replacement Rehabilitation Reduced Scope, Total Project Cost 77 80 Life cycle cost in $2010 22 42 Reduced scope life cycle costs* 4 10 Economic impact with reduced scope N/A 13 Schedule with reduced scope 4 Years 4 Years * Present Value of maintenance/repairs costs discounted over 100 years using a rate of 3.5%.

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6/13/2010 43

Summary - Comparison of Alternatives*

* Comparison based on full scope for both Options

Project Objective Replacement Rehabilitation

100 year service life Y Y M 8.5 seismic performance Y Y Heritage conservation– existing bridge structure N Y Heritage conservation – site Y Y Dedicated multi-use path Y Y On-street bike lanes Y N Dedicated rail crossing Y Y 3 lanes for vehicles Y Y Dedicated sidewalk Y Y Eliminate “S” curve Y N Integration with existing and proposed pathways Y Partial Traffic calming Y Y Upgraded navigation channel Y N Consolidation of existing green space Y N

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Final Comments

  • 2009 Delcan Condition Assessment

recommends that repair/replacement is required by 2012

  • MMM concurs that concerns raised in previous

reports need to be addressed

  • Do nothing – will lead to closure of the bridge in

the near future.

6/13/2010 44

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Johnson Street Bridge Project Options Peer Review

New Structure The bridge concept proposed is considered technically appropriate. Existing Bridges – Rehabilitation Options

  • We concur that the replacement of the mechanical and electrical systems is required.
  • Seismic upgrading is required and will be a challenge, both in design and construction.

Cost Estimate The total cost projected for either a new or rehabilitation is considered reasonable.

6/13/2010 45

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Questions

6/13/2010 46