Siah Darreh 1 Farhadi (, also Romanized as SëÃÂh Darreh 1 FarhÃÂdë; also known as SëÃÂh Darreh-ye FarhÃÂdë and SëÃÂh Darreh-ye Yek) is a village in Teshkan Rural District, Chegeni District, Dowreh County, Lorestan Province, Iran. At the 2006 census, its population was 129, in 29 families.