This Construction Administration-high complexity assignment is for Hwy 403 Eastbound and Westbound lanes for 10.5Km including interchange ramps at Winston Churchill Blvd, Erin Mills Parkway, Mavis Road and Hurontario Street; all located in Mississauga.
This section of freeway is high trafficked, high volume urban section with AADT of nearly 200,000 vehicles. The scope includes pavement rehabilitation, structural box culvert rehabilitation (7) by concrete patch repairs to barrel and walls/roof, non-structural drainage culvert (4) replacement at interchange ramps, electrical retroffiting for exisitng high mast illumination poles to LED type luminaires, replacement of underpass and conventional ramp luminaires to LED type, ATMS camera site and access pad modifications and bridge rehabilitation at Glen Erin Drive.
Bridge rehabilitation scope includes removing and replacing expansion joint assemblies and bridge barrier wall, modification and widening of exisitng structural sidewalks for Multi-use Path conversion, bridge deck and substructure concrete patch repairs to deteriorated areas and deck waterproofing membrane replacement. Illumination hydro cable relocation and protection of exisitng plant during bridge rehabilitation is also included. Hwy 403 mainline pavement rehabilitation generally consist of mill/remove 90mm pavement and hot mix paving of 140mm (2 underlayers of binder course plus surface course SMA mix) for effective profile grade raise of 50mm.This grade raise is to be matched to exisitng edge of shoulder features such as median concrete barrier and guiderail where exisitng. Mill/pave work is required to maintain positive drainage of all lanes/shoulders at all times.
Interchange ramps generally include resurfacing by hot mix paving. Mavis Road within CAH limits include 90mm pavement removal and hot mix paving. NITS detection installation at signalized intersection is also in the scope at 2 interchanges.
The pavement rehabilitation work is to occure during evening/night time/weekend shifts and off-peak times as permitted by lane closure time windows specified. Bridge rehabilitation at Glen Erin Dr is scoped in 3 total traffic stages thereby maintaining one lane of traffic in each direction in each of the stages. Road occupancy permits or permission to enter may be required for box culvert access off of municipal roads/side streets outside of MTO Right-Of-Way. Structural culverts are: Glen Erin Brook culvert, Cooksville Creek culverts at Hurontario Street, east of Mavis Road and Central Parkway, Chappell Creek culvert, Mary Fix Creek culvert and Wolfdale Creek culvert.
The project is classified as Group C under Provincial Class Environmental Assessment with Environmental Screening Document prepared and included for CA services. Major stakeholders requiring routine liaison and communication are City, Region, Transit agencies, Emergency Services, utility owners etc. 4 structural culverts have in-water work timing window permitted from July 1 to March 31 due to direct or indirect fisheries habitat.
