Northern Rockies Regional Municipality

Public Notice: River Works


Public Notice

Muskwa River Construction

In July of 2011, the Northern Rockies Regional Municipality (NRRM) was directed by the Ministry of Environment (MOE) to extend the outfall pipe for NRRM's wastewater treatment plant (WWTP) because it does not meet regulatory requirements. Construction of the Fort Nelson Wastewater Treatment Plant Outfall Relocation is currently underway.  The scope of this project includes relocation and replacement of the entire gravity outfall system from the WWTP site to the Muskwa River along a new alignment, including new diffusers in the River.


A portion of the 2.4 km outfall pipe was installed in the summer/fall of 2017, with the remainder of the pipeline being installed in the spring/summer of 2018.  This notice is meant to inform the public of works expected to take place during the 2017/2018 winter.


Scheduled Activities

In the coming winter months (i.e. December through March), the contractor will be completing the in-river component of the work.  This work entails construction of a temporary coffer dam in the Muskwa River to provide a dry working area to install the outfall diffuser pipe below the river bed.  Work will include: 

1) Construction of Ice Platform: 

2) Sheet Pile Installation:

3) Boring Pit Excavation:

4) Horizontal Boring:

5) Diffuser Installation:

6) Clean-Up and Demobilization: 

Nov. 29, 2017 - Jan. 3, 2018

Jan. 3 - 21, 2018

Jan. 21 - 25, 2018

Jan. 26 - Feb. 9, 2018

Feb. 10 - Mar. 15, 2018

Mar. 1 - 15, 2018


The in-river component of this project is being carried out in the winter months as this is when the river level is at its lowest.  All permits are in place with Ministry of Forests, Lands and Natural Resource Operations as well as the Department of Fisheries and Oceans.  To minimize impact to the environment, the contractor will be following best practices and the Construction Environmental Management Plan (CEMP) that has been reviewed and approved by the regulatory agencies.


Public Access to Muskwa River

Public access to the Muskwa River outside of the designated construction areas will remain, however residents should note all construction signs and to stay outside of designated construction area(s).  Visitors are cautioned to avoid traveling on the river whenever possible as ice formed in the area may become unstable as a result of construction activities.  This is especially important as temperatures warm in early spring.


A map of the work is available here [PDF - 1.1 MB].


For project-related inquiries, please contact Terry Cavaliere, NRRM Public Works Administration Manager email: or phone: (250) 774-2541.

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