Mezue ahịrịokwu na-esonụ: Na 1971, n'ụtụtụ nke
Ala ọma jijiji Sylmar, ndị bi na Granada Hills, Northridge, North Hills, na Van Nuys ndị bi n'agbata Balboa Boulevard na San Diego Freeway ka a chụpụrụ mgbe ọ fọrọ nke nta ka Lower Van Norman Dam gbajie. Otú ọ dị, e gbochiri oké idei mmiri n'ikpere mmiri Bull Creek.