Case Study
Efficiency and quality of work stand out as Walker completes construction of Grey-Bruce’s first roundabout at Highway 21 and County Road 10 with minimal traffic disruption.
Alvanley, Ontario
Complex traffic planning and scheduling allowed the busy intersection to remain open during construction.
A high traffic intersection in Alvanley, Ontario is home to a new roundabout – the first of its kind for both Grey & Bruce Counties – thanks to the work of Walker Construction (formerly Harold Sutherland Construction). A Contract Services Administrator representing the Ministry of Transportation (MTO) tendered the reconfiguration of the high-volume intersection at Highway 21 and County Road 10 in an effort to improve the flow of traffic and decrease the number of serious collisions occurring there.
Walker won the bid and started work in 2016 to reconstruct the dangerous crossroads. Essential to local residents and businesses, it was imperative that the intersection remain open during construction. The project required significant traffic staging to allow traffic flow to continue, accomplished through complex traffic control panning and detailed scheduling.
Walker used its comprehensive product and service offering and local supply network to manage the project efficiently. The team sourced high quality local aggregates from Keppel Quarry – now Sutherland Quarry, part of the company’s aggregates division – which were graded and compacted to create the roundabout’s base material. Walker’s experienced construction crew installed catch basins, manholes and pipe all sourced from local suppliers.
The roundabout project used Super Pave Asphalt (SP12.5FC and SP19.0) from Downs Asphalt Plant for the surface, and 30Mpa concrete from Walker’s nearby ready mix plant in Alvanley to build curbs, gutters and sidewalks. The plant, known for its expert custom mixes, tested the product extensively to ensure it met the MTO’s stringent criteria.
Walker was able to complete the project on time with no safety concerns; an exceptional accomplishment given the complexity of traffic planning and scheduling involved. Local community members and provincial dignitaries complimented the efficiency and quality of the work at a ribbon cutting ceremony commemorating the new roundabout.
75% decrease
national average for roundabouts decreasing collisions causing injuries. 39% National average for decrease in collisions.
100% locally sourced
building materials and supplies used to complete the project.
8 months
from start of project to completion.
Walker built Grey-Bruce’s first traffic roundabout to improve the flow of traffic and decrease the number of serious collisions at the busy intersection of Highway 21 and County Road 10.
Optimized Asphalt mixes for longer surface life
Walker offers Super Pave hot mix asphalt in all our service regions. Specialized to meet project requirements and designed to take traffic and climate into consideration. Super Pave is versatile and supports a wide range of applications. Formulated to resist deformations, fatigue and low temperature cracking.