Diablo was settled in the early 1900s as a community of summer homes.  By the end of the 1940s many residents were living in Diablo full-time and demanded infrastructure like a sewer system and paved roads. 

The Knightsen Town Community Services District (KTCSD) is a local governmental agency governed by a 5 member board of directors. It was established in 2005 by Measure Z. The Knightsen Town Community Services District (KTCSD) encompasses approximately 5,100 acres and 600 parcels. It was formed to provide enhanced flood control and water quality (drainage services) for the community of Knightsen…