The citizens of Avenal voted for incorporation in September 1979, and while going through the early stages of being a new city, the citizens pursued and were successful in bringing a state prison to Avenal. Avenal State Prison opened in 1987. By 2009, it housed 6,577 inmates and employed 1,517 people, making it a vital part of the community. The building of the facility dramatically increased the city's total valuation with construction, improvements and activity that could be seen in every area of the city.