|Client:||City of Ottawa|
|Location:||Lees Avenue underpass on Highway 417, Ottawa, Ontario|
|Timeframe:||July 2013 – November 2014
- Removal and replacement of the heaviest superelevated bridge (2100 tonnes) in North America using Rapid Lift Technology;
- The new bridge is a two-span super-elevated structure on structural steel box girders
- Part of the widening of Highway 417 for Ottawa Light Rail Transit Project (OLRT)
- Short time frame for completion during 2 overnight highway closures;
- Removal of the previous three-span Lees Ave Underpass on Hwy 417 was completed by a hybrid in-situ demolition of spans one and three adjacent to the highway and rapid removal of the center span over the highway.
- Winner of Ontario Steel Design Award of Excellence – April 2015
- Use of Rapid Replacement Technology to remove the bridge in just 17 hours, 7 hours ahead of schedule
- Girders installed on temporary structures and concrete deck formed & poured on the erected steel in the staging area close to the location of the existing bridge
- Self-propelled modular transporters (SPMTs) used to lift the poured structure off the temporary shoring and move it to its final location
- Placement of 3,000 tonnes of granular material to create usable access road for removal;
- Placement of 4,200 metric tonnes of granular A for bridge replacement;
- Supplementary work completed during highway closure: removal of 100 meters of Noise Wall; completion of 2 sewer crossings; grinding & paving Central Transitway structure; St-Laurent structure work; installation of a catch basin; removal of 3 catch basins
This project required the efforts of Tomlinson Environmental Services – Industrial Waste Division, RWT for equipment and trucking and Aggregates for backfill material.