# Illinois BidBuy #27-557THA-ENGCO-B-54317

Six-month amendment for I-294 drainage improvements and erosion correction

**Posted:** October 07, 2026
**Respond By:** October 22, 2026
**Identifier:** 27-557THA-ENGCO-B-54317
**NAICS:** 237310, 237990

This is a post-award amendment to the Illinois Tollway’s I-294 drainage-improvement contract at the 75th Street interchange.
- **Government buyer:** Illinois Toll Highway Authority (THA), Engineering – Construction.
- **Work:** Correct unexpected slope bank erosion and allow time for project closeout.
- **Amendment:** First amendment to the existing contract; it is not a new solicitation and requires no additional funding.
- **OEMs and vendors:** No product manufacturers, OEMs, or vendors are named.
- **Products and quantities:** No new products or product quantities are specified.
- **Service line item:** One contract amendment for drainage-improvement work and closeout; no part number is provided.
- **Notable requirement:** The notice identifies an expiration for the existing contract, but no date is included here.

### Description

This notice concerns a six-month first amendment to the construction contract for drainage improvements at the Tri-State Tollway (I-294) 75th Street Interchange. Additional work was required to correct unexpected slope bank erosion, and the amendment allows project closeout activities to be completed before the contract expires on November 1, 2026. The original contract was awarded to Martinez Frogs, Inc. for $3,288,237.25. 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-54317&external=true&parentUrl=close)