Provides an inventory of resources in Ajo and western Pima County and land use planning proposals so that the Planning and Zoning Commission and Board of Supervisors have the opportunity to add western Pima County to the Comprehensive Plan as part of the 2001 Plan Update.

Provides background information on improved mapping techniques that have led to a proposal to update the Watercourse and Riparian Habitat Protection and Mitigation Requirements Ordinance adopted in 1994. New riparian classification maps will be forwarded to the Board to consider for adoption during 2003.

Recommends where riparian land acquisitions would be most effective in serving as mitigation that would cover all priority vulnerable species identified in the SDCP. Priority is given to reaches of watercourses.