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. To help you make your request, you can use our sample request form (PDF) View. Contractors must fill out the ATP-2 Form and submit NYSDOL. 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,. We provide resources for this project. Documents This page links to PDF files.