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G.W.P. 4058-01-00
Highway 417 Bridge ReplacementHighway 417 Bridge Replacement
Canadian Society of Value Analysis2006 ConferenceOctober 24, 2006
West of Maitland Avenue to East of Island Park Drive
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Presentation Outline
• Description of Project
• Heavy Lift / Rapid Replacement Technology
• Risk Assessment Process
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Overview of Project Area
Carli
ng A
venu
e
Highway 417
Island Park
Merivale
Carling WB
Kirkwood
Carling EB
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Limits of Contract 2
KIRK
WO
OD
CARLING WBL
CARLING EBL
CLYD
E
MAI
TLAN
D ISLAND PARK
Limits of Contract 1
MER
IVAL
E
Overview of Project Area
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Island Park Drive Bridge – South Side
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Island Park Drive Bridge – North Side
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Island Park Drive Bridge
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Description of the Work – Contract No. 1
Merivale
Island Park
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Construction Staging Area
Merivale
Island Pa
rk
Proposed Construction Staging Area
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Heavy Lift Technology
Use of Rapid Replacement Technology is new to MTO
Save $$$
Reduce congestion during construction
Reduce overall project duration
Pave the way for future projects
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Heavy Lift Technology
SPMT – Self Propelled Modular Transporters.
Adaptable.
“Turns on a dime”.
Transports over uneven surfaces.
MAMMOET – Heavy Lift Specialist.
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Mammoet Animated Video
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Description of the Work – Contract No. 2
Heavy Lift Replacement
Rehabilitation
Retaining Walls
Kirk
wood
Island ParkCarling WBL
Carling EBL
Clyd
e
Mait
land
Mer
ival
e
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Description of the Work – Contract No. 2
Bridge replacement using heavy lift for:n Carling Avenue westbound;n Kirkwood Avenue;n Carling Avenue eastbound; andn Clyde Avenue.
Bridge rehabilitation:n Merivale Road.
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Description of the Work – Contract No. 2
Widening 417 for construction continued…n Storm sewer replacement (median if
required);n New storm sewer for outside widening
(new construction);n Overhead signs; andn Upgraded illumination.
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Description of the Work – Contract No. 2
Widening 417 for construction continued…n Retaining walls;n Three (3) lanes in each direction;n Additional lane width constructed for
staging;n Ramp modifications;n Median barrier replacement;
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Local Roadways Construction – Contract No. 2
Lowering of profiles to maintain bridge clearances – staged construction;Rehabilitation of underground plant (as required):w Storm and sanitary sewers;wWatermains;w Illumination / traffic signals; andw Bell, hydro, gas, etc.
Reinstatement of roadway elements.
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Risk Assessment - Objectives
Comprehensive risk assessments for both contracts
Increase confidence in project development
Identify project risks and their impact on the project cost and schedule
Determine mitigation measures and responsibilities for addressing the project risks
Particular emphasis to be given to rapid-lift issues
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
MRC’s Project Risk Management Process -RECAP
Risk Management Planning
Risk Identification
Qualitative Risk Analysis
Quantitative Risk Analysis
Risk Response Planning
Risk Monitoring & Control
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Risk Assessment Workshop
Expert PanelIndependent S.M.E.’s• MRC Bridge Specialist• MRC Construction Specialist• General Contractor• Heavy Lift Specialist
Project Team• MRC Design Team• MTO P.M. & Key Staff
MRC RECAP Risk Team• Facilitator• Risk Analyst/Modeler
Stakeholders• City of Ottawa• N.C.C.
• Historical Data• Experience• Researched Opinion
• Historical Data• Experience• Researched Opinion
• Historical Data• Experience• Researched Opinion
Risk Management Report• Risk-Based Cost Estimate & Schedule• Risk Register
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Variations in project costsProject Scope Creep – Add-onsEconomic changes – inflation, market conditionsUnknown/Changed Conditions (Geotechnical, Environmental, Structural Etc)Third Party ApprovalsQuantity under runs / overrunsProperty ImpactsUtilitiesPlanning or Design Errors & OmissionsSchedule Delays (weather, labour, material / equipment supply)
Variations in project scheduleSchedule Delays (weather, labour, changed conditions, material/equipment supply)
Project Risks
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
1. Risk-Based Construction Schedule for Rapid Lift Operation
2. Risk-Based Cost Estimates for Contracts 1 and 2
3. Risk Assessment, Risk Register and Risk Management
4. Summarize Key Benefits of Risk Assessment
Results of Risk Assessment
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Island Park Drive Bridge – Plan View
Existing Conditions – Island Park Drive (Contract 1)
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Island Park Drive Bridge – Cross-Section
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Roadway Closures for Contract No. 1
Potential Road ClosuresPotential Detours
Kirk
woo
d Isl
and
Park
Meriv
ale
Park
dale
Bays
wat
er
Carling at Kirkwood eastbound on-ramps
closed
Island Park off-ramp and adjacent local roads to nearest
intersection closed
Westbound on-ramp closed at Parkdale All ramps closed at
Rochester
Bron
son
Pres
ton
Boot
h
Carling
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Description of the Work – Contract No. 1Rehabilitation of Island Park Drive Bridgew Superstructure replacement;w Abutment refacing;w Removal of existing sound barrier and
installation of new sound barrier;w Replacement of sidewalks and curbs;w Removal of old connection to Merivale Road
from Island Park Drive;wDeck construction / demolition within
construction staging area; andw Reinstatement of construction staging area.
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Construction Staging Area
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Risk Assessment
1. Risk-Based Construction Schedule for Rapid Lift Operation
Ø Hwy 417 Closure Duration ?Ø Ministry Preference - ASAP
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Superstructure Replacement
1. Pre-rapid lift operations (on prior weekend(s));
2. Rapid lift operations (on a weekend); and
3. Post-rapid lift operations (on subsequent weekend)
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Pre-Rapid Lift Operations
1. Removal of existing approach slab;2. Excavation of backfill to structure;3. Sawcutting of ballast wall;4. Securing ballast wall to existing girders;5. Temporary reinstatement of granulars and asphalt
pavement
w Note work completed in stages by maintaining one or two lanes of traffic in each stage
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Rapid Lift Operations
1. Remove asphalt and granulars behind ballast wall;2. Remove existing EBL and WBL superstructures to
staging area for demolition;3. Transport new EBL and WBL superstructures from
staging area;4. Level EBL and WBL superstructures;5. Granular backfill; 6. Pave bridge deck and approaches (waterproofing
completed in staging area);7. Install temporary concrete barriers and open to
traffic
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Pre-Rapid Lift Operations
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Deck Final Condition
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Project Team Estimates of Duration of Operations (Hrs) *
913381b381c
47 & 221354313-3
2012381a
Post-Rapid Lift
Rapid Lift
Pre-rapid Lift
Option
* Excluding time to close down 2 lanes or all lanes on the Queensway
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Risk-Based Modeling
Task 1 Task N
Critical PathStart End
• Uncertainty in “Base” Activity Costs and Durations
7 56
1 21 11 0
8 4
21
9 3
_
7 56
1 21 11 0
8 4
21
9 3
_
• Risk Events (likelihood of occurrence and likelihood for additional costs and delays if event occurs)
Uncertainty inTotal Project Costand Duration
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Risk-Based Schedule for Rapid Lift Duration (Hrs)
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Rapid Lift Operations
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
“Base” Task Durations
• Risk Events (likelihood of occurrence and likelihood for delays if event occurs)
Model Uncertainty in Total Task Duration
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Distribution for Task 20-Level Structure Duration
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Distribution for Task 18 – Remove Asphalt/Granular Behind Ballast Walls
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Distribution for Rapid Lift Operations - Hwy417 Closed/...
0.000
0.050
0.100
0.150
0.200
0.250
0.300
0.350
Mean=14.10703
8 10 12 14 16 18 20 228 10 12 14 16 18 20 22
5% 90% 5% 11.86 16.8
Mean=14.10703
Prob
abili
ty
Hwy Closure Duration (Hrs)
80th Percentile 15.3 Hrs
Hwy Closure Duration (Hrs)
Alternative 1A - Distribution for Hwy 417 Closure Duration During Rapid Lift (Hrs)
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Risk-Based Estimates for Duration Of Operations (Hrs) *
913381b
(12.8)381c
47 & 22135
4313 (13.7)-3
913381b
2012 (15.3)381a
Post-Rapid Lift**
Rapid Lift***Pre-rapid Lift**
Option
80thPercentile
* Excluding time to close down 2 lanes or all lanes on the Queensway
** Lane reductions on weekends ***Highway closures on weekends
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Level of Detail – early in design process2006 $No contingencyNo escalationNo engineering costsNo property costsValidated by Risk/Cost Team
Results of Risk Assessment
2. Risk-Based Cost Estimates for Contracts 1 and 2
Base Cost Estimate
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Risk-Based Cost Estimate for Contract 1
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Base Cost Estimate (Contracts 1 & 2)
$61,959,074.05Total Construction Base Cost Estimate
$3,948,450.00Bridge Replacement - Island Park Drive14
$1,105,230.00Bridge Widening/Rehabilitation - Merivale Road13
$4,733,950.00Bridge Replacement - Carling WB12
$4,987,120.00Bridge Replacement - Kirkwood Avenue11
$5,151,650.00Bridge Replacement - Carling EB10
$4,113,270.00Bridge Replacement - Clyde Avenue9
Low Cost Alternatives = $7,710,735.00$8,543,900.00Retaining Walls (Conventional)8
$535,118.90Side Road Grade Lowering - Island Park Drive7
$543,173.64Side Road Grade Lowering - Merivale Road6
$1,164,696.35Side Road Grade Lowering - Carling WB5
$2,600,858.32Side Road Grade Lowering - Kirkwood Avenue4
$1,648,855.02Side Road Grade Lowering - Carling EB3
Side road cost estimates assume full utility relocations$2,063,163.42Side Road Grade Lowering - Clyde Avenue2
Includes storm sewer replacement, highway illumination & ATMS$20,819,638.40Highway Component (Grading, paving, etc…)1
RemarksTotal PriceDescriptionItem No.
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Distribution for Project Total - Contract 1and 2/F31
Value
s in 1
0̂ -7
Values in Millions
0.0000.2000.4000.6000.8001.0001.2001.4001.6001.8002.000
Mean=7.251371E+07
64 68 72 76 8064 68 72 76 80
5% 90% 5% 69.2743 75.8661
Mean=7.251371E+07
Excludes:
• Property Costs
• Engineering Costs
80thPercentile $ 74.2 M
Distribution of Total Project Cost - 2006 $ (Contracts 1 & 2)
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Distribution for Project Total - Contract 1and 2 YOE/O31
Value
s in 1
0̂ -7
Values in Millions
0.000
0.200
0.400
0.600
0.800
1.000
1.200
1.400
1.600
1.800
Mean=7.879638E+07
70 76 82 8870 76 82 88
5% 90% 5% 75.1349 82.5281
Mean=7.879638E+07
Excludes:
• Property Costs
• Engineering Costs
80th Percentile $ 80.7 M
Distribution of Total Project Cost (Contracts 1 & 2) YOE $ M
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Risk-Based Cost Estimate for Contract 1
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
5 5.5 6 6.5 7
Contract 1 - Cost (YOE $M)
80th Percentile $ 6.08 M
Excludes:
• Property Costs
• Engineering Costs
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
34 Risks / Opportunities Identified
Risk Register Populated By Risk Team - Spreadsheet
Risks/Opportunities Ranked By Risk Team
Preliminary Response Strategy Identified
Monitoring & Control By Project Design Team
Risk Assessment
3. Risk Register and Risk Management
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Risk Register
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Risk Register.. Cont’d
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Prequalification of Contractors
Traffic Management & Communication Plans
The construction schedule, including lead time for steel supply / fabrication, is challenging and consideration of an accelerationof the design / tendering process is recommended;
Incentive / Disincentive clauses should be tied to realistic expectations of the duration of the rapid lift replacement
Subsurface conditions in staging area (Geotechnical investigation not complete).
Consideration of advance work required for Contract 2 (WM, Road Lowering, Storage of Granular for Staging Areas)
Approvals (N.C.C., City of Ottawa)
Key Risk/Opportunity Areas – Contract 1
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Overall Project Cost;
Additional cost escalation due to labour shortage (Ottawa LRT Project);
Traffic Management & Communication Plans;
Prequalification of Contractors;
Additional cost escalation due to labour shortage (Ottawa LRT Project);
Subsurface conditions @ Structure Widenings / retaining walls;
Constraints imposed by utilities incl. major 1200 dia WM;
Constraints imposed by Hydro One Towers & high-voltage conductors;
Key Risk/Opportunity Areas – Contract 2
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Need to stage / limit number of local road closures at same time;
Utility relocations in local roads;
Likelihood that overnight Hwy 417 closures will be in 13- 15 hrs range;
Need for additional stand-by equipment
Depth of existing asphalt on bridge decks;
Property impacts;
Remote location of Clyde Avenue staging area and utilities on route;
Approvals (N.C.C., City of Ottawa)
Key Risk/Opportunity Areas - Contract 2 ..Cont’d
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
(WM & Hydro Towers)
Retaining walls
Examples of Contract 2 Risk Areas
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Remoteness of Clyde Avenue Staging Area
Overhead Utilities on Clyde Avenue
Examples of Contract 2 Risk Areas .. Cont’d
Clyde Avenue - South Portal
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Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Bearing Replacement Details
Improved Design Development
Pre-Rapid Lift
Final
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Risk management plan has been implemented
(mitigation, elimination, acceptance of key risks)
Design development for Rapid Lift has been significantly improved
Risk-based cost estimates for Contracts 1 & 2 Developed
Risk-based Hwy 417 closure duration (14-15 hrs) for Rapid Lift
defined for contact planning/approvals
Risk-based Schedules for both Contracts 1 & 2 developed
4. Summary - Key Benefits of Risk Assessment
Risk Assessment
Highway 417 Bridge Rehabilitation - West of Maitland Avenue to East of Island Park DriveG.W.P. 4058-01-00
Questions?
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