April 1972 — Boat launch at Castaic Reservoir had just been completed when this photograph was shot. It wasn't yet open to boaters.
Residents of the Newhall-Saugus Area (Santa Clarita Valley) voted April 24, 1962, to connect to the State Water Project, necessitating the formation of the Upper Santa Clara Valley Water Agency
to wholesale the water to the local water retailers. The entity was renamed Castaic Lake Water Agency in 1970 as plans were in the works to build a reservoir to hold the water in Castaic.
Construction on the dam started in 1967 and was completed in April 1972. The Castaic Reservoir, colloquially known as Castaic Lake — not to be confused with the original, natural Castaic (aka Castac)
Lake in Lebec — opened for recreational use in phases: the afterbay (lower lake) on May 22, followed by the upper (main) lake on June 26. (Note: A date of June 3 was previously recorded for the opening of Castaic Lake, but nothing actually happened on that date.)