Contact Information

Engineering Department
Flood Plain Maps and Information
Magnesium Chloride Application
 Ferrin2 County Engineer John Ferrin Crosby is a native of St. Johns, Arizona. He received his Bachelor of Science degree in Civil Engineering from Northern Arizona University. He is a registered Professional Civil Engineer. Ferrin and his wife, Tara have five children . Both of their parents come from pioneer stock who settled in the White Mountains in the late 1800’s.
The Engineering Department is located on the West side of the Apache County Annex Building 75 West Cleveland Street St. Johns.
Office Hours are 6:30 am – 5:30 pm Monday – Thursday.


Engineering Staff
Apache County Engineering
P.O. Box 238
St. Johns, AZ 85936
Phone: (928) 337-7528
FAX: (928) 337-2062
Yvette Greer
Executive Assistant
Phone: (928) 337-7528
Delos Bond
Flood Plain Manager &
Right of Way Specialist
Phone: (928) 337-7535
Dale Hauser
Safety & Purchasing Agent
Phone: (928) 337-7531
Tammy Davis
Civil Engineer Aide/911 Addressing
Phone: (928) 337-7666
Jared Greer
Civil Engineer Aide/Signs

Phone: (928) 337-7505
Zach Pemberton
GIS Manager

Phone: (928) 337-7536
Bailey Hesson
GIS Technician
Phone: (928) 337-7597