Are bees allowed? Yes. There are no restrictions. (No digital citation as there is no code regarding honey bees.)
If a nuisance was called: A claim could be filed per Nuisance and Animal Control. See http://www.grimesiowa.gov/CityCodes/NuisanceandAnimalControl.aspx
Additional notes: City refers to County and State code when it has no code.
Contact: Scott Clyce
Department: City Hall
Title: Building Administrator
County: Dallas and Polk