Sanitary Sewer Replacement
The sanitary sewers requiring replacement along Terminal Avenue are mainly Asbestos Cement installed in 1960. These sewers generally run parallel with the roadway underneath the sidewalks and will be replaced in their current location (online). A total of 1320m of sanitary sewer is scheduled to be replaced under this project. Wherever possible, the sidewalks that are removed or damaged during construction will be rebuilt with 1.8m - 2.1m wide asphalt sidewalks to improve the safety of pedestrian travel throughout the corridor.
The two major areas for sanitary sewer replacements are dashed in yellow and shown for the north (Figure 2A) and south (Figure 2B) parts of the project area.
Storm Sewer Replacement/Improvement
Two surface drainage improvements will be completed that will remove operational risk associated with the existing pipe alignments. Alternate drainage routes will be evaluated and the sewers rebuilt in order to eliminate any private property issues and ensure access is available for future operation and maintenance. Figures 3A and 3B show the location of these improvements along with their potential new locations which total 450m of new storm sewer.
While most of the watermain in the Terminal Avenue right-of-way was upgraded to Ductile Iron in 1991, some sections of much older Cast Iron watermain from 1954 currently remain and are scheduled for replacement prior to restoration of the road surface in 2018. As part of this project approximately 260m of watermain will be upgraded/replaced. Figure 4 shows the main location of the water system improvements on Terminal between Dawes and Stewart.
Once all of the subsurface utilities have been upgraded, the surface pavement along Terminal Avenue will be rehabilitated using a technique called Mill and Overlay. This will extend the life of the existing roadway by 20-25 years and will create a smooth surface by eliminating the effects of tire ruts and asphalt breakdown that has occurred over decades of use.
This is accomplished by grinding out a depth of approximately 65 mm of existing asphalt, and replacing it with the same depth of new hot mix asphalt. As the project scope does not include any road widening, the existing curbs, gutters, and sidewalks will remain, with only the pavement surface being restored; approximately 22,500 m2 of road surface area will be rehabilitated.