Humboldt County Maintenance Garage 307 2nd St N Humboldt, IA 50548 Phone : (515) 332-1737 Business Category Government Offices-County Legislative Bodies Humboldt County Of--engineer Ofc, Maintenance Garage 307 2nd St N Rutland, IA 50582 Phone : (515) 332-1737 Business Category Government Offices-County Government Offices & Public Schools