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.Bidder must provide one (1) copy of the Proposal form. Bidder must only submit bid information in the designated areas of the Proposal form. Each invitiation to bid is posted on our website and can be found under the section titled "Current Solicitations". The Bidding Requirements consist of the Invitation to Bid, Instructions to Bidders,. This document is a bid form submitted for the procurement of goods.