As of January 2018 all of the subsurface utilities have been upgraded. The pavement rehabilitation will start along Terminal Avenue in mid-April 2018 and will be completed using a technique called Mill and Overlay. This is accomplished by grinding out a depth of approximately 65 mm of existing asphalt, and replacing it with the same depth of new asphalt. The design calls for superpave asphalt, which stands for SUperior PERforming Asphalt PAVEments. This type of asphalt system primarily addresses two pavement distresses: permanent deformation, which results from inadequate shear strength in the asphalt mix; and low temperature cracking, which is generated when an asphalt pavement shrinks and the tensile stress exceeds the tensile strength. The design parameters are shown below in Table 1.
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 23,000 m2 of road surface area will be rehabilitated. 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.
Sanitary Sewer Replacement
The sanitary sewers replaced along Terminal Avenue were mainly Asbestos Cement installed in 1960. These sewers generally run parallel with the roadway underneath the sidewalks and were replaced in their current location (online). A total of 1320m of sanitary sewer was replaced under this project. Sidewalks that were removed or damaged during construction were rebuilt with 1.8m - 2.1m wide asphalt and concrete sidewalks to improve the safety of pedestrian travel throughout the corridor.
The two major areas where sanitary sewer replacements were completed 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 were completed that remove operational risk associated with the existing pipe alignments. Alternate drainage were constructed 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 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 remained and were replaced in 2017. As part of this project approximately 260m of watermain was upgraded/replaced. Figure 4 shows the main location of the water system improvements on Terminal between Dawes and Stewart.