In October, 2012, the Los Angeles County Board of Supervisors adopted the Santa Clarita Valley Area Plan Update, more commonly known as the “One Valley One Vision” Plan (OVOV). OVOV replaced the prior Santa Clarita Valley Area Plan with the Santa Clarita Valley Area Plan Update developed through the OVOV process. OVOV also amended the Countywide General Plan to clarify adopted provisions related to hillside management areas, and to allow local plans such as OVOV, and to establish the allowable maximum residential densities in hillside management areas. Impact Sciences prepared the Environmental Impact Report for the project.