Complex sentence: The Sherwood Dam, known also as Lake Sherwood Dam, Alturas Dam, and Potrero Dam, is a long concrete arch dam in the Santa Monica Mountains near Thousand Oaks, California, completed in 1904.
Split into simpler sentences: The Sherwood Dam, known also as Lake Sherwood Dam, Alturas Dam, and Potrero Dam. It is a long concrete arch dam in the Santa Monica Mountains near Thousand Oaks, California, completed in 1904.