Phase 1 of the Riverhead Wastewater Treatment Facility: Secondary Treatment Expansion Project

The Project includes geotechnical design and site preparation for the future secondary treatment facility, and upgrades to the primary treatment facility at St. John's, NL. The secondary treatment facility design will incorporate biological processes to improve effluent quality, ensuring the system meets long-term wastewater treatment needs. Site preparation will involve clearing, blasting, excavation, slope stabilization, and access road reinstatement. Upgrades to the primary treatment facility will add a fourth clarifier, a new mechanical bar screen, and improvements to the digester heating system, biogas feed, and scum pumps, ultimately increasing primary treatment capacity from 134,800 m³/d to 160,000 m³/d. This work will improve the reliability and performance and expand the capacity of the Riverhead Wastewater Treatment Facility, and support the future secondary treatment expansion.

Latest update

June 25, 2025: Housing, Infrastructure and Communities Canada issued its Notice of Determination and determined that the project is not likely to cause significant adverse environmental effects..

Participate

Key documents

Key documents
Document number Document title File Date
1 Notice of determination - June 25, 2025

Contacts

Infrastructure Canada
Ines Peraza, Environmental Review Officer
180 Kent St.
Ottawa, Ontario K1P 5P5
Telephone: 343-573-8553
Email: mariaines.perazaarcila@infc.gc.ca


Disclaimer

This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.

  • Location

    • St. John's (Newfoundland and Labrador)

  • Nature of Activity

    • Water Management
    • Waste Management

  • Assessment Status

    Completed

  • Start Date

    2025-05-14

  • Proponent

    City of St. John's

  • Authorities

    • Infrastructure Canada

  • Assessment Type

    Project on federal lands

  • Reference Number

    89537

Nearby assessments

...within 200 kilometres
Report a problem on this page
Date modified: