Cancellation of Vibration Modelling Tests

Microblasting had been scheduled for September, and neighbourhood residents were mailed a flyer to that effect a few weeks ago. Using a network of seismic sensors with detonation of very small explosive charges, the tests were meant to study vibration transmission in the vicinity to help us better plan future operations.

As this is a new procedure meant to validate methodology and coordination between the various experts involved, we did a test far from any homes, on the Yamana property in Francoeur. We concluded that the exercise has the potential for disruption if there were difficulties with the implementation. Nor did the test offer us full assurance that we would achieve the desired objectives.

In keeping with our commitment to avoid or minimize disturbances to the neighbourhood, we decided to cancel the tests.

Vibration modelling will nonetheless be done using the usual conservative data. For example: the model considers that the rock is a single solid block, when the presence of fissures would, in fact, mitigate vibration.

The modelling would subsequently be adjusted using the data collected during vibratory monitoring of the bulk sample and the continuous monitoring of mining operations.