The spread of invasive species creates serious environmental problems as well as economic hazards for residents and will hamper implementation of parts of the SDCP.

Provides an inventory of infrastructure resources in the Upper Santa Cruz subregion of Pima County.

Provides an inventory of infrastructure resources in the southeast subregion of Pima County.

Provides an inventory of infrastructure resources in the northwest subregion of Pima County.

Provides an inventory of infrastructure resources in the southwest subregion of Pima County.

Provides an inventory of infrastructure resources in the Tucson Mountains / Avra Valley subregion of Pima County.

Chronicles some of the changes in the Pima County Zoning Code since 1953 and summarizes the comprehensive plan, the zoning code, and the building codes.

An assessment of the problems that are presented by non-native and introduced species in maintaining native species and natural systems. Divided into two major sections, the study covers representative ecosystems in Pima County as well as representative species that have a negative impact on native species.

A companion to the study issued on July 5, 2000 entitled 'Cactus Ferruginous Pygmy-Owl Investigations in Pima County.' The major objective was to determine whether pygmy-owls chose nest sites or perch trees with characteristics that differ from other available sites within a nesting territory.

Provides an inventory of infrastructure resources in the Catalina Foothills subregion of Pima County.