Public Notice

Blocked Culvert Replacement, Lac Philippe Waste Lagoon – Public Comments Invited

September 28, 2022 – The National Capital Commission must determine whether the proposed Blocked Culvert Replacement at Lac Philippe Waste Lagoon located in Gatineau Park, Quebec is likely to cause significant adverse environmental effects in compliance with sections 81-91 of the Impact Assessment Act and the National Capital Act.

To help inform this determination, the National Capital Commission is inviting comments from the public respecting that determination. It is important to note that all comments received will be considered public. For more information, individual should consult the Privacy Notice on the Registry website.

Written comments for this project must be submitted within 30 days of the date of this posting, referencing project name and registry number:

By email: IA-EI@ncc-ccn.ca

 

By mail: Environmental Officer, Environmental Assessment group

40 Elgin, 5^th floor

Ottawa, ON, Canada

K1P 1C7

 

The National Capital Commission thanks you for your comments, which will be considered in the project determination. Please note that responses may not be provided.

 

 

For National Capital Commission general inquiries, please contact:

Email: info@ncc-ccn.ca

Telephone: 613-239-5000 or 1-800-465-1867 (toll-free)

TTY: 613-239-5090 or 1-866-661-3530 (toll-free)

www.ncc-ccn.ca

 

 

 

The Proposed Project

The goal of this project is to restore flow within a collapsed and blocked culvert, located on federal land, south of the Lac Philippe camping waste lagoon in Gatineau Park, Quebec.  During routine maintenance the culvert was inadvertently collapsed by a contractor truck due to corrosion and excess weight. Removing and replacing the culvert prior to winter is required. Work will begin in early November and will be completed before December 25, 2022.

The general scope of work is as follows:

1. Site preparation
   • Import granular material or steal plates to the vicinity of the culvert as a base for machinery.
   • Import clean sandbags to be used as cofferdams.
   • Installation of wildlife protection measures, such as exclusion fencing.
   • Installation of erosion and sediment control measures, such as silt fencing or hay bails, as required.

 

1. Culvert replacement
   • Install a generator powered pump on the inlet side of the culvert to divert water over the culvert.
   • Use of end of pipe filters to prevent wildlife from being sucked into the pump.
   • Install sand bang coffer dams on either side of the culvert.
   • Excavation of access road above culvert.
   • Removal of metal culvert.
   • Installation of clear stone or granular base (foundation).
   • Placement of new culvert (like for like in size).
   • Backfill and compaction of material above new culvert.

 

1. Post-culvert installation 
   • Placement of rip rap around pipe to prevent erosion long term.
   • Removal of man-made structures, such as sandbag culverts.
   • Removal of water pumps.
   • Restoration of banks and access road.