[1] Originally opened in 1957 in a back canyon in the Puente Hills, the landfill was made to meet the demands of urbanization and waste-disposal east of Los Angeles.

[6] The Puente Hills Landfill Native Habitat Preservation Authority directs the acquisition, restoration, and management of open space in the Puente Hills for preservation of the land to protect the biological diversity and provide opportunities for outdoor education and low-impact recreation.

[7] In 2022, the county approved funding for the Puente Hills Regional Park on 142 acres (57 ha).

to assess the validity of recycling,[citation needed] The television documentary series MegaStructures focused on the landfill in the episode "Garbage Mountain".

[9] Edward Humes discusses the landfill in his book Garbology: Our Dirty Love Affair with Trash (2013).