As a result , the population grew exponentially : today Genk has about 65,000 inhabitants with 107 different ethnic backgrounds .
In 1901 , coal was discovered in Genk and three mining sites were developed : Zwartberg , Waterschei and Winterslag ( C - mine today ) .
The population grew exponentially : today Genk has about 65,000 inhabitants with 107 different ethnic backgrounds .
In 1901 , coal was discovered in Genk and three mining sites were developed : Zwartberg , Waterschei and Winterslag ( C - mine today ) .