Description
JML Engineering completed an OSIM inspection of the Oliver Road Bridge over Corbett Creek in 2009. Significant structural deficiencies, load carrying capacity concerns, narrow deck/road width, and poor alignment were observed. JML recommended replacement of the structure be considered.
The existing structure was a two lane, concrete deck and steel girder bridge supported by concrete abutments and wingwalls.
In early 2013, JML was awarded the replacement of the Oliver Road Bridge project.
JML recommended the replacement structure consist of a multi-plate arch culvert founded upon cast-in-place concrete strip footings.
For the design of the new crossing, a site survey was done, and a subconsultant completed a geotechnical investigation. Detailed design considered location, horizontal alignment, vertical alignment, span, width, navigability of the watercourse, fish habitat, environmental requirements, vehicular traffic during construction, hydrology and hydraulics.
For the hydraulic design, the Ministry of Transportation Directive B-100 titled ‘Design Flood Criteria’ was considered. In addition, the Regional Storm was modelled using HEC-RAS software. Modelling of larger flood events was an important aspect of this project due to multiple residences and private property being located nearby.
A multi-plate steel arch culvert on concrete strip footings was the preferred solution based upon a combination of ease of construction, short construction timeline, two lane width at the crossing, low initial construction cost, minimal long-term maintenance, and maintaining a natural streambed.
JML Engineering provided detailed design drawings and specifications in OPSS format, obtained regulatory approvals, completed a Schedule B Municipal Class Environmental Assessment, tendering, and contract administration/site inspection during construction.
Construction began in July 2013 with paving completed by October 2013.