To receive notices of future bid opportunities, bidders must register with the County's "INFOR Supplier Portal Registration Program" Upon receipt of your bid, you will receive a reply indicating your bid has been received.Current bid postings and plan holder lists, historical bid tabs, as well as project information for various projects, can be accessed below. Detailed information, blank proposals and complete specifications may be obtained on the. Judy V. Wirsching, CFO. The Contractor must submit a complete cost proposal. All cost proposals must be made on the Cost Proposal.