# Illinois BidBuy #27-557THA-ENGCO-B-54566

Six-month planning studies contract extension for the Tri-State Tollway project

**Posted:** October 26, 2026
**Respond By:** November 10, 2026
**Identifier:** 27-557THA-ENGCO-B-54566
**NAICS:** 541330

The Illinois Toll Highway Authority is extending an existing planning studies contract for the Tri-State Tollway project.
- **Buyer:** Illinois Toll Highway Authority (THA), Engineering – Construction Department; Downers Grove, DuPage County, Illinois.
- **Award action:** Change order extending the existing planning studies contract; the notice states it is not a solicitation.
- **Services:** One six-month extension to support coordination and review with the Illinois Department of Transportation (IDOT), obtain Phase I approval for IL-19 at I-294, and coordinate CDA land acquisition for the Phase 2 process.
- **Cost:** No additional funds are required; no contract value is provided.
- **Participation goals:** 29% Business Enterprise Program (BEP) and 5% Veteran Business Program (VBP).
- **OEMs and vendors:** No OEMs, contractors, or vendors are named.

### Description

This notice concerns a change order to the Planning Studies contract, originally awarded to Christopher B. Burke Engineering, Ltd. for $5,000,000. A six-month extension through June 30, 2027, is requested to continue coordination and review with IDOT and obtain Phase I approval for IL-19 at I-294. Additional time is also needed for CDA land acquisition coordination for the Phase 2 process. No additional funds are required, and the notice states that it is not a solicitation.

[View original listing](https://www.bidbuy.illinois.gov/bso/external/bidDetail.sda?docId=27-557THA-ENGCO-B-54566&external=true&parentUrl=close)