In early 50s deposits of phosphorus-containing sands and sandrocks were discovered in Kingisepp district, and they were called Kingisepp phosphorite field. In March 1961 the decision was adopted to develop Kingisepp phosphorite mine. First batch of products, ground phosphate, was obtained on December 25, 1963. As early as in 1965, the second phase of the project was finalized with the double increase in ground phosphate production. Phosphorus-containing reserves of the deposit developed by Phosphorit amount to over 300mt.