The Barragem do Cedro (Cedar Dam) was built between 1890 and 1906 using stone masonry, cement and steel, at the foot of the Pedra da Galinha Choca (Brooding Hen Rock), the most famous of the monoliths.

[2] The unit is administered by Superintendência Estadual do Meio Ambiente Ceará (Semace), the state environmental agency.

The area is already partly under the legal responsibility of the National Institute of Historic and Artistic Heritage (IPHAN: Instituto do Patrimônio Histórico e Artístico Nacional), since it holds little-explored archaeological sites, so its status is under review.

[1] It is prohibited to remove, dismantle or deface the rock formations, or to deploy equipment in the natural structures.

Civil works, earthworks and opening and maintaining roads are prohibited if they would cause substantial ecological changes.