i y i m t a a k information bulletin — number 1, january 2009
Eastmain-1 Hydroelectric Development
Results of the monitoring of the Fish Pass at KP 207 of the Eastmain River (2006 to 2008)
The fish pass at kp 207, at the right of the picture
Species Lake sturgeon Longnose sucker White sucker Northern pike Walleye Total
No. of tagged fish in 2008 2 43 17 17 33 112
In total, between May and November 2008, 112 tagged fish got through the fish pass at KP 207, including two lake sturgeons (see table beside). Monitoring will continue in 2009. But in reality, the number of fish that went through the fish pass at KP 207 is higher because only the fish that are tagged are counted.
A sense of commitment…
to plants and wildlife
Eastmain-1 Hydroelectric Development
Fish Pass at KP 207 of the Eastmain River Activities from 2006 to 2008
In spring 2006, the high flow volumes discharged into the Eastmain River displaced several of the concrete blocks on the walls separating the pools in the fish pass, rendering it inoperative. The blocks were replaced in fall 2006 and anchored to ensure that they remain in place in the future. In 2007, the flow through the fish pass was too fast (about 2 m/s) to allow sturgeon to migrate upstream.
External transmitter installed on the dorsal fin of a sturgeon
From May to November 2008, antennae installed on each side of the pass served to
In April 2008, corrective measures were applied to the fish pass in order to slow the flow down, i.e., a second row of concrete blocks was placed and deflectors were installed at the vertical slot of each channel wall. As of the month of May, flow velocities were found to be between 1 and 1.4 m/s, which did allow for upstream migration.
track migrating fish that had been tagged with PIT transmitters. In addition, mobile telemetric monitoring of sturgeons tagged with external transmitters was conducted to supplement the data. The table presented on the other side of this page shows the number of fish by species that passed through the structure.
For more information, please contact: Martin Desgagné, Advisor - Native Affairs and Projects 1 800 903-9705, ext. 4951 This Information Bulletin is published by Hydro-Québec Direction régionale La Grande Rivière
A sense of commitment…
to plants and wildlife