Wednesday, February 9 – update from Kevin Gibbs, Senior Engineer, Infrastructure Projects
- The excavation work to continue the installation of the trunk storm sewer on Alpine will resume starting this Friday, Monday at the latest. The location of the excavation will be in front of 933 Alpine. The mechanical shovel will be delivered on site shortly
- Our site inspector will be going door to door notifying the residents on Alpine shortly and in advance of the restart of the excavation work on Alpine.
- The Contractor will have two crews, one on Alpine and one continuing the trunk storm on Henley
- We are in the process of chlorinating the new 406mm (16in.) watermain and we anticipate this new watermain to be in service by Feb 25th.
- The temporary water services to the residents on Alpine will continue to be in service until the trunk sewer installation is completed in front of 947, 943, and 937 Alpine. At this point the service transfers to these homes will be carried out and the temporary water service will be removed.
Wednesday, February 2 – update from Kevin Gibbs, Senior Engineer, Infrastructure Projects
I would like to give you a quick update on the commissioning of the new 406mm (16 in.) watermain.
The contractor was planning on completing the watermain commissioning work on Alpine by the end of January 2022, however their schedule has been impacted by factors related to COVID related supply issues and material delays for repair parts required to fix a leak identified prior to the holiday break.
Additionally, the extreme cold weather and recent major snow events (48 cm received on January 17, 2022) have added to schedule delays.
The personnel issues related to Covid Protocols have also reduced CACE’s presence onsite from two crews to one crew.
As a result of the combined effects of all of the above, contractor has decided to delay the final connection at the south end of the 406mm watermain on Alpine until the Spring of 2022 when weather conditions are more favorable and risks of winter conditions will no longer have an impact. The new 406mm will be in service but connected only to the existing watermains at Henley. By delaying the south end conection until Spring it will minimize risks possible connection to existing watermain difficulties and will allow the connection when the temporary water system will be installed for Part 2 work at Alpine and Clarenda, thus minimzing risks of water service outages to residents on south portion of Alpine.
This approach would also postpone the temporary connection between 972 Arkell and 971 Alpine to when the weather will be warmer, which would reduce risks related to freezing of the temporary connection.
Once the new 406mm watermain is in-service ( with connection to existing watermains at Henley), it is planned to delay the water service transfers for 947, 943, and 937 Alpine Avenue until after the deep sanitary and trunk storm sewer installation in front of those homes is completed (final portion of Part 1 work). Keeping these three homes on temporary water until after the trunk sewer installation is completed will be advantageous as it will minimize water service disruptions for these residents and reduce risk associated with freezing of the water service when the trench is excavated for the trunk sewer installation.
Kevin Gibbs, P.Eng.
Senior Engineer, Infrastructure Projects | Design & Construction – Municipal(West)
Planning, Infrastructure and Economic Development Department | City of Ottawa