Conclusions
 
Trenchers help to meet the following requirements: 

 

- Minimize over-excavation. 

- Reuse of excavated materials optimally. 

- Minimize the amount of excavated material to evacuate. 

- Reduce or eliminate road transport and related to the disposal of excavated materials and importation of fill materials (bedding & padding) manipulations. 

- Minimize any linked environmental effects to road transport and storage of excavated materials. 

- Reduce or eliminates the risk due to the use of explosives.