Claim: Nikolay Pogredov oversaw the construction of the first experimental oil shale open-pit in Estonia, and, in 1916-1923, published a series of papers on this subject.
Evidence: Nikolay Pogrebov, (Russian: Николай Фёдорович Погребов; 17 November O.S. 5 November] 1860 in Saint Petersburg – 10 January 1942 in Leningrad) was a Russian and Soviet hydrogeologist and an engineering geologist. Since 1902, he studied the Baltic Oil Shale Basin. From July to November 1916, the geological survey of the resource was performed under his guidance. He oversaw the construction of the first experimental oil shale open-pit in Estonia. In 1916–1923, he published a series papers on this subject. He was Chairman of the 1st all-Union Congress of Hydrogeologists in 1931 and the 1st all-Union Meeting of Landslide in 1934. 17 November 1860
Saint Petersburg Russian Russian/Soviet Union Studies of the Baltic Oil Shale Basin Hydrogeology