Why did California State Parks, Contra Costa Country and the Diablo Community Services District Allow the Property Owner to Build the Wall on the Road (Mt. Diablo Scenic Blvd.) in 2009?

Why Did California State Parks Allow the Property Owner to build the Wall within the 60ft Easement (Mt. Diablo Scenic Blvd.)Granted to them in 1931?

Did the Wall Contribute to the Death of Maayan Jones on June 26, 2019?