Description

The primary source of information for this map was the Arizona Department of Transportation (ADOT) Highways Division Maintenance Activity record for the years 1980-1985. The two highway maintenance activities that provided data for this map are described below: 1. Activity 164 - Minor Slide Removal 2. Activit~180 - Major Damage and Disaster Maintenance (contains records of slide removals with costs exceeding $2500.00) Only those ADOT slides with maintenance costs exceeding $1000.00 were plotted on the map. Whenever possible, the symbol for events that involved several miles of roadway was plotted in the approximate midpoint of the damaged interval. whenever necessary, parallels and meridians were projected into regions not previously surveyed by the state of Arizona. Preliminary Map of Selected Mass-Movement Events in Arizona.