New drilling for the tunnel Québec-Lévis

The ministry of Transportation of Quebec (MTQ) has received an order of new geotechnical investigations for the tunnel project, Québec-Lévis. That said, the territory of intervention referred to is so broad that it is impossible to define, for the moment, the exact same course of the future third link.

At least that is what one finds in the reading of a call for tenders published yesterday. The Quebec government says it wants to make “drilling and surveys in terrestrial and marine, as well as the characterization of soil and rock in place” for the mega-project.

Companies have until 16 march to submit their bids and the contract will be for a duration of three years.

In the published document, a map of the “territory of action” is visible. We note from the outset the broad scope of this area.

It may relate to the new preferred route that connects the two centers-the cities of Québec and Lévis. But it may as well match the old path, to the east, which connects highways 20 and 40, through the tip of the island of Orleans.

Drilling “complementary”

Yesterday, Emily Lord, a spokesperson for the MTQ, has made it known that the data to be collected ” is necessary for the continuation of the ongoing studies and will be used eventually in the preparation of the next steps. These holes are in addition to those conducted last year. The department wishes to begin these studies as early as this summer. ”

Last fall, the MTQ had to perform a series of drill holes to better understand the soils of the plot of the third link. Four were conducted in Lévis, one to the island of Orleans and Quebec city.

“We want to know the quality of the rock. We are going to send waves into the ground and we’re going to watch how the waves propagate around the boreholes “, said the spokesman Guillaume Paradis at this time.

Up to 100 meters of depth

In the technical data of the tender yesterday, it was mentioned that the depth of the drilling and surveys can go up to 100 meters.

Also, ” the service provider must carry out the characterization of soil and rock in place, including through the achievement of field trials and laboratory required “, says one.

For drilling, the selected company will have to ” choose the place the least injurious to the watercourse and its riparian buffer zone […] No tree or residue should be left in a watercourse, lake or other bodies of water […] No trees can be cut without having obtained the necessary authorisations “.

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