##  [Evaluation of the Performance of Rehabilitation Activities at the Hollinger Tailings Management Area (HTMA)](/resource/evaluation-performance-rehabilitation-activities-hollinger-tailings-management-area-htma) 

Organization

[Canadian Land Reclamation Association (CLRA)](/organization/canadian-land-reclamation-association-clra)

 

 

Project

[National CLRA Conference Papers](/project/national-clra-conference-papers)

 

Resource Type

[Report](/taxonomy/term/38)

 

 

Author(s)

Brian Fraser

Sarah Barabash

Thomas Sulatycky

 

 

Original Authors

Brian Fraser

Sarah Barabash

Thomas Sulatycky

 

 

Resource Date:

2016

 

Page Length

17

 

 

During the closure planning process PGM collaborated with the City of Timmins and  
Mattagami Region Conservation Authority (MRCA) to determine a long-term land-use  
plan that would benefit the community. According to the plan, the Site will be maintained  
as a green space for walking and hiking and will not be used for activities that could  
physically disrupt the vegetation. The overall objectives of the rehabilitation work at  
HTMA included:

- Improving surface water quality in Town Creek and groundwater quality on site in the long term;
- Improving the long-term physical stability of the tailings to eliminate mine hazards, stabilizing soils to reduce steep slopes and limit surface erosion so that no further tailings enter Town Creek; and,
- Improving the aesthetics of the HTMA by removing debris and vegetating the surface.

Overall it is evident that the HTMA rehabilitation measures had a greater positive  
influence on water quality than predicted. The pH values at DS655 post-rehabilitation  
exceed predictions for both the spring freshet and summer low flow conditions by 1 to 2  
pH units on the low end of the prediction and by between 0.5 and 1.0 pH units on the  
high end. For each of the other COPCs monitoring data collected between 2012 and  
2014 are one to two orders of magnitude less than the values predicted for the post-rehabilitation  
era.