Find information about contracting with Hennepin County, including processes, forms, and diversity rules for goods and biddable services. Bids are generally submitted in the county's electronic bidding system, Supplier Portal.Purchasing and Contract Services - Procurement portal for managing bids, soliciations, purchasing and vendors. Each invitiation to bid is posted on our website and can be found under the section titled "Current Solicitations". The City will reconstruct Hennepin Ave. Between W. Lake St. and Douglas Ave.