In 1949, the underground of the OUN was most active in the villages of Trostyanets and Krekhovychi, according to the data of the regional administration of the MGB. Vyhodsky District was added to Dolyna District in 1957 and in 1962, the district was included in the Kalusa Industrial District. However, by 1965, Dolyna District was formed again.Указ ПРЕЗИДИУМА ВЕРХОВНОГО СОВЕТА УССР 27.11.1939 «Об образовании Львовськой, Дрогобычской, Волынской, Станиславской, Тарнопольской и Ровенской областей в составе УРСР»
