Governor Abdul Celil Oz said the avalanche today hit a hydroelectricity plant construction site near the town of Caykara, in the Black Sea coastal province of Trabzon.
He said rescuers and villagers recovered the body of one worker and were searching for four others.
Oz told NTV television by telephone,"God willing we will reach them alive but the avalanche was huge and dangerous."
Turkey has been hit by a cold snap this week that has blanketed much of the country with snow.