How to bid on NADIN/AWOS Maintenance for Illinois DOT

What the agency is buying and why it matters

The Illinois Department of Transportation is seeking a vendor for NADIN/AWOS maintenance at the State’s non-Federal weather observation sites. This is a change order notice, extending an existing contract.

The contract term is being extended by four months, through April 28, 2031. It also increases funding for as-needed, manufacturer-certified replacement parts. The vendor will use department inventory when available and ensure sites remain FAA-compliant and operational for aviation safety.

Key dates and what happens at the deadline

This opportunity was published on July 28, 2026. The deadline for submissions is August 11, 2026, at 4:00 PM ET. All responses must be submitted before this time.

Who this opportunity suits

This opportunity is suitable for firms with expertise in facilities maintenance, specifically related to weather observation systems like NADIN/AWOS. Vendors should be capable of procuring manufacturer-certified replacement parts and ensuring compliance with FAA requirements.

How to respond

To access the full documents, click “View original source” on the bid detail page. The documents are publicly listed there.

To submit a quote electronically, you must register a free vendor account on the BidBuy portal. If you do not wish to quote electronically, follow the specific submission directions provided within the bid documents. Ensure your submission is made before the stated deadline.

Practical tips for a competitive response

Carefully review all sections of the solicitation, especially those detailing the scope of work for maintenance and parts procurement. Pay close attention to the requirements for manufacturer-certified parts and FAA compliance.

Highlight your firm's experience with similar weather observation systems and your ability to source necessary components. Clearly outline your approach to ensuring uninterrupted service and adherence to all regulatory standards.