It could be month before CP Rail removes two submerged rail cars from the Thompson River.

Spokesperson Mike LoVecchio says concerns about high water levels and the impact on migrating salmon will keep crews from starting work for at least a few more weeks.

The cars derailed and were knocked into the river during a rockslide July 1, south of Lytton.

LoVecchio says water levels are too high for workers to safely remove the cars, and they want to wait until the Chinook salmon finish migrating through the area.

The two rail cars were leaking glycol, a chemical used in antifreeze, but divers plugged several holes in the cars last week.

Two other cars knocked off the tracks have already been removed from the area.

LoVecchio says the remaining cars are anchored to the river bottom with steel cables, and officials will continue to monitor the water for any contamination.