A sense of commitment…to plants and wildlife

Eastmain-1 HydroElEctric dEvElopmEnt

i y i m t a a k information bulletin — number 1, january 2009

The fish pass at kp 207, at the right of the picture

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.

Species No. of tagged fish in 2008

Lake sturgeon 2Longnose sucker 43White sucker 17Northern pike 17Walleye 33total 112

Results of the monitoring of the Fish Passat KP 207 of the Eastmain River (2006 to 2008)

Eastmain-1 HydroElEctric dEvElopmEnt

A sense of commitment…to plants and wildlife

External transmitter installed on the dorsal fin of a sturgeon

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.

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.

Fish Pass at KP 207 of the Eastmain River Activities from 2006 to 2008

From May to November 2008, antennae

installed on each side of the pass served to

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