King-Vaughan Road Bridge Replacement · 2020-07-30 · King-Vaughan Road Bridge Replacement Welcome to the Public Information Centre (PIC). Please record your attendance and obtain

Public Information Centre WELCOME

King-Vaughan Road Bridge ReplacementDetailed Design and Municipal Class EACity of Vaughan

Location: Al Palladini Community Centre, Activity Room #1

Time: 6:00 – 8:00 pm (Drop-in Session)Date: December 11, 2019

King-Vaughan Road Bridge Replacement

Welcome to the Public Information Centre (PIC).

Please record your attendance and obtain a comment sheet at the registration desk.

Please review the various display boards.

Should you have any questions regarding the presentation materials or any aspect of the study, please speak with Municipality or Consultant study team members in attendance.

We encourage your input and feedback.

Please deposit completed comment sheets in the comment box or mail/email to the address at the bottom of the form on or before January 10, 2020.

There is an opportunity at any time during the Detailed Design process for interested persons to provide written input.

Any comments received will be collected under the Environmental Assessment Act and, with the exception of personal information, will become part of the public record.

Welcome

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The King-Vaughan Road Bridge is an arch bridge constructed in 1920 and carries one lane of vehicular traffic across the East Humber River in one continuous span.

The deterioration of the structure triggered the need for a Schedule C Municipal Class Environmental Assessment (Class EA) Study to assess an appropriate rehabilitation / replacement strategy.

An Environmental Study Report (ESR) was completed in April 2018 and submitted for a 30-day public review with the preferred design of a full bridge replacement.

No objections or Part II Orders were received after the review period and could therefore proceed to detailed design and construction.

Background

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Public Information Centre (December 11, 2019)


Preferred Preliminary Design following the ESR

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The Preferred Preliminary Design selected following completion of the ESR was the replacement of the existing structure. The main components of the Preferred Design were as follows:

Single span, integral abutment bridge with side-by-side pre-stressed concrete box girders; Cast-in-place concrete distribution slab; Asphalt and waterproofing wearing surface; Two 3.25 m lanes and two 1.5 m shoulders; Bridge opening of 18.86 m, centered and perpendicular to existing channel alignment; Flows up to and including the 100-year event will be accommodated by the new opening

without overtopping; Existing horizontal alignment maintained; 1 m raise in vertical roadway profile; and No property acquisition requirements.

The Detailed Design has revisited the above components through further consultation with stakeholders and members of the general public to ensure the design of the replacement bridge minimizes environmental impact and meets the needs of the project.

Preferred Preliminary Design following the ESR

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We Are HereMunicipal Class EA & Design Process


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Detailed Design and Implementation Planmac Engineering Inc. has been retained by the City of Vaughan to complete Phase 5

(Implementation) of the Municipal Class EA Process

This includes detailed design, production of contract drawings, complete any outstanding technical studies / surveys and obtain permitting, prepare contract documentation, and see through the construction of the bridge replacement as Contract Administrator

Outstanding studies and surveys include the following: Stage 2 Archaeological Assessment; Topographic Survey; Geotechnical Investigation; Hydraulic Assessment; Traffic Management Plan; and,Further Structural Analysis.


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Archaeology Assessment The Stage 1 assessment conducted during the Preliminary Design phase revealed

that two major features of archaeological potential exist within the study area including the East Humber River tributary and several important early transportation routes.

A Stage 2 Archaeological Assessment was undertaken as part of the Detail Design phase. Indigenous communities participated in the Stage 2 Archaeological Assessment including monitoring the fieldwork and reviewing the draft assessment report.

The Stage 2 assessment did not result in the identification of any archaeological materials. Archaeological Research Associates Ltd. recommended that no further assessment be required within the project lands.


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Geotechnical Investigation A geotechnical borehole investigation was carried out to assess subsurface conditions at the

bridge site and to provide foundation recommendations for the bridge replacement.

Two (2) boreholes were drilled at the subject site either side of the watercourse to depths ranging from 25 to 28 m below ground surface.

Below the fill in the boreholes, loose to compact cohesionless (sandy) deposits were found extending to depths ranging from 13.7 to 15.2 m, underlain by very stiff to hard clayey silt deposits. Weak sandy deposits were found extending to depth of more than 10 m, which are not suitable for supporting shallow foundations (i.e. footings).

Deep foundations such as driven piles and drilled caissons can be adopted to support the proposed bridge.

The results of the geotechnical investigation recommended the new bridge be supported on H piles driven to the hard clayey silt deposits.

The presence of groundwater table in the cohesionless (sandy) soils overlying the clayey silt deposits will make the construction of the caissons difficult. An oversize temporary caisson liner will be required which must be sealed in the underlying clayey silt deposits.


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Hydraulic Assessment A hydraulic analysis was performed for the East Humber River to confirm the current 50 Year and 100

Year design flow rates and corresponding flood elevations.

A hydraulic model was prepared to confirm flood conveyance of the existing bridge opening and to provide recommendations as to whether it is necessary to revise the bridge height.

For the new bridge design, Ministry of Transportation Directives (B100) and Ministry of Transportation (MTO) Highway Drainage Design Standards (2008) were followed.

Review of model results suggests that flood flows up to 100-year event can be successfully conveyed through the proposed 18.86 m span bridge, meeting the minimum conveyance criteria as per the MTO directive.

As per the MTO standards, for bridges servicing arterial roads, both freeboard and clearance shall be greater than or equal to 1.0 m. It is estimated that freeboard and clearance depths of the proposed bridge under the 50-year flow are 1.21 m and 0.51 m respectively. In turn, the proposed bridge design satisfied the MTO criteria regarding the freeboard, however, does not comply with the clearance criteria.

Although the proposed bridge does not satisfy all listed MTO criteria, the conveyance capacity and road inundation conditions are greatly improved; and negative impacts to flooding are considered limited and only exist locally at the crossing.


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Traffic Management Plan Close the bridge crossing temporarily and detour traffic onto Highway 27, Kirby Road and Kipling Avenue. Local traffic will be allowed access either side of the structure.

King‐Vaughan Bridge

Road Closure (Except Local Traffic)

Proposed Detour Route


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Detour Route Signage

King‐Vaughan Bridge


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Environmental Protection Measures Schedule vegetation removal to avoid disturbance to breeding birds (prior to April 1 and after August 15)

Restore disturbed areas / habitat to natural or better conditions

If construction works are scheduled in the late spring / summer, isolation fencing should be installed by the first week of May to keep Snapping Turtles and/or other amphibians out of the construction site

Redside Dace in-water works timing period of July 1 to September 15 should be applied. Redside Dace are classified Endangered species at risk (SAR) both provincially and federally. Permitting / approvals for watercourse works have been sought as part of the detailed design

Should previously undocumented archaeological resources be discovered, the Contractor must cease alteration of the site immediately and engage a licensed consultant archaeologist to carry out archaeological fieldwork, in compliance with Section 48(1) of the Ontario Heritage Act

Affected road users and property owners will be notified in advance by the Contractor (e.g. signage, notices), as to construction schedule/ duration

Contractor will be required to comply to local noise by-laws

Control dust using water and not chemical suppressantsRedsideDace


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Detailed Design: Main Components

SUBSTRUCTURE

310 X 110 H steel piles Reinforce concrete abutments

SUPERSTRUCTURE

700 X 1220 Prestressed Concrete Box Girder Reinforced concrete Deck Steel tube barrier railing Reinforced concrete wings wall 40 mm HL3 top asphalt 50 mm HL8 binder coarse asphalt



Detailed Bridge Design (Plan)


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Detailed Bridge Design (Profile)



Detailed Bridge Design (General Arrangement)


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Detailed Bridge Design (New Bridge Elevation and Section)


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Detailed Design: Tentative Construction Schedule

Contractor Awarded: April/May 2020

Construction Start: June 2020

Construction Completion: end of November 2020

Next Steps

Review and consider public commentsFinalize Detailed Design Drawings Prepare Construction Tender Document Initiate Construction and Contract Administration

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YOUR COMMENTS ARE IMPORTANT TO USPlease complete a Comment Sheet or take one home with you before you leave.

Comment Sheets may be placed in the comment box or returned to the Study Team by email or mail to either:

PIC display board information will be available on the City of Vaughan website vaughan.ca/KingVaughanBridgePlease provide your comments on or before January 10, 2020.

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Mr. Mike Neumann, P.Eng.Project ManagerPlanmac Engineering Inc.92 Caplan Avenue, Suite 115Barrie, ON L4N 9J2(705) 719-7981 /C: (705) [email protected]

Pat Marcantonio, C.E.T.Project ManagerCity of Vaughan2141 Major Mackenzie DriveVaughan, ON L6A 1T1(905) 832-8585 ext. [email protected]



Documents

King-Vaughan Road Bridge Replacement · 2020-07-30 · King-Vaughan Road Bridge Replacement Welcome to the Public Information Centre (PIC). Please record your attendance and obtain