Notice of Construction for Maintenance Holes on West 1st Street Laneway

The North Shore Wastewater Treatment Plant Project (the Project) is starting the construction of two new maintenance holes in the West 1st Street laneway, north of West 1st Street and east of Philip Avenue. This work is required to complete pipe connections to the new plant. Prep work is scheduled to start the week of October 13, 2020, and will conclude early 2021.

Maintenance hole construction includes three main components: the installation of a temporary pipe bypass system to support the existing sewer line and mitigate utility disruptions; construction of Maintenance Hole #2 and connection to the existing sewer to shorten the pipe bypass; and then construction of Maintenance Hole #1.

What to expect:

Temporary Pipe Bypass (mid-October to mid-January)

  • Prep work for the temporary pipe bypass starts the week of October 13, for approximately two weeks and will be in place for the duration of this work.
  • Pipe placement on sidewalk linking two existing maintenance holes one on Philip Avenue and approximately 200m east of Philip, please see map for location details.
  • Sidewalk detour will be in place, pedestrians directed to use Welch Street to access businesses.
  • While the bypass is connected in Philip Avenue, access to Philip Avenue, north of West 1st will be via Welch Street.
  • The bypass will be in operation during excavations and piling required for the new maintenance holes. Pumps will move materials in the bypass for a 24/7 period for approximately two weeks in mid-November. Noise screens will be installed around the pumps to mitigate noise.
  • Additional use of the bypass may be required in the case of emergency.

Maintenance Hole #2 and Connection to Existing Sewer (mid-October to early-December)

  • Scheduled to start early the week of October 13 and will be in place for approximately 8 weeks.
  • Laneway access off of Philip Avenue will be restricted; access via Welch Street is maintained.
  • Work includes excavations (approximately 10 days) and installation of a new maintenance hole and connections to the existing sewer. Adjacent businesses may experience a temporary increase in noise and vibrations.
  • Once complete, the bypass will be connected and removed from Philip Avenue for the duration of this work.

Maintenance Hole #1 (late-October to mid-January)

  • Work area will restrict access to some parking (see map below for restricted areas); alternate reserved parking is available for business and customer use at 107 Pemberton Avenue.
  • A designated business drop-off area is located beside the work area, with vehicle access via Welch Street.
  • This component is anticipated to take the longest since additional time will be required to prepare multiple pipe connections and work around existing infrastructure.
  • Piling (approximately five days) and excavations (approximately seven days) will occur mid-November. Adjacent businesses may experience a temporary increase in noise and vibrations during this work.

The majority of this work will take place during regular work Monday to Friday 7:00 a.m. to 8:00 p.m. and 9:00 a.m. to 5:00 p.m. on Saturdays. As this work progresses, extended hours may be required to complete work outside of business hours. The District of North Vancouver has approved extended hours for less noisy work such as deliveries, maintenance, preparatory works and pipe testing.

Work continues on West 1st Street to complete pipe connections, crews are currently positioned in the Philip Avenue and West 1st Street intersection. Following completion of maintenance hole installation, work to install pipe connections from the two new maintenance holes, across West 1st Street to the Project site will occur in sections. Work on West 1st Street is anticipated to be complete in Spring 2021.

We appreciate your patience as we complete this work. If you have any questions about the work described in this letter, or to sign up for Project updates, please contact the Project’s Community Liaison Officer at 604-928-7810 or

Map of work location and components