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Notice of permit
Regional or Local Number: MPO-LEP-QC-DPP-2015-002
Notice is hereby given that pursuant to the provisions of section 73 of the Species at Risk Act permit no. MPO-LEP-QC-DPP-2015-002 is issued.
Activity affecting the species is incidental to the carrying out of the activity
The proponent resorted to the temporary layout of a cofferdam in the St-François River to dry a working area in the escape channel of the Larocque dam. The dam area on the right side of the river has been drained. However, the spillway, located at the left end, allowed a flow of water on the left side of the river. The excavation area was dewatered, creating unconnected pools in the stream bed. Upstream of the work area, a basin was present and it was not in contact with the excavation area. A waterfall allowed a continuous flow of 0.5 m3/s to be discharged in the basin. The oxygenation and temperature conditions remained adequate for the fish that were found in this isolated basin. The lowering of the water level within the zone of intervention was made in a gradual manner. The excavation area of the escape channel was dewatered for about five weeks. The work was carried out between 10 August and 15 September. In order to minimize the effects of falling water levels on the Channel Darter during drying of the dam, the fish were moved to the part of the watercourse that was still supplied with water.
Start Date: 2015-08-01 End Date: 2015-09-30
Issuing Authority: Department of Fisheries and Oceans
- Species at Risk Act
Location of Activity (province, territory or ocean):
a) Alternatives were considered and the best solution was adopted. The excavation of the escape channel can be done only by lowering the water level, which will expose a segment of the river downstream. b) Measures have been taken to minimize the negative impact of the activity on the species and its habitat. The water level was lowered gradually to allow the fish to reach the basin upstream of the work. A fall allowed a continuous flow of 0.5 m3/s to be discharged into the basin, where adequate oxygenation and temperature conditions for the fish were found. Fish caught in unconnected pools were captured by seine or electric fishing and transported to the Saint-François River. c) The works lasted about five weeks and involved drainage of the working area by cofferdams. Mitigation measures have been planned to prevent mortality of fish in the cofferdam. For these reasons, the project is not likely to jeopardize the survival or recovery of the species.
Fisheries Protection Division, Regulatory Reviews, Fisheries and Oceans Canada
850 route de la Mer, P.O. Box 1000
Mont-Joli , QC
- Date modified: