Minneapolis-based Ryan Cos. is proposing to build a 350,000-square-foot warehouse on 35 acres at 5800 S.E. Delaware Ave. in Ankeny. The project is valued at $20 million, according to city documents. Last week, the Ankeny City Council approved a development agreement that would provide up to $1.17 million in property tax rebates to Ryan over five years. The agreement requires that construction of the warehouse begin no later than March 15, 2021, and for at least 70 new jobs to be created by the building’s tenants, who are expected to be new to Ankeny. When completed, the development is expected to have an assessed value of at least $17.5 million, according to the development agreement.