sentences:  On 15 May 1975 "tambon" Sap Samo Thot together with "tambons" Sap Mai Daeng, Nong Chaeng, and Kan Chu were split from Nong Phai District to create the minor district ("king amphoe") Bueng Sam Phan.It was named "Bueng Sam Phan" ('Sam Phan pond') after the most important water resource of the district.The minor district was upgraded to a full district on 25 March 1979.