Contract Summary

This is Addendum No. 3 to Contract I-25-4768, a contract requirements document issued by the Illinois State Toll Highway Authority (ISTHA) for grading and drainage improvements on the Elgin O'Hare Western Access (I-490) project, specifically covering the Beeline Drive to Supreme Drive segment between mile post 3.0 and mile post 4.0. The addendum was issued on March 11, 2026, with a proposal deadline of March 19, 2026, and represents a notice of revision to contract requirements with electronic bidding conducted via BidBuy.

The addendum modifies the contract Schedule of Prices by revising pay item quantities and adding new special provisions. The primary change involves adding a new pay item (JT154103) for "Allowance for Railroad Flagging and Services" in the amount of 1,000,000 units at $1.00 per unit, totaling $1,000,000.00. Additionally, a new special provision (P-95A) establishes a budgetary allowance for railroad flagging and related services required for Illinois Tollway system expansion work. Under this provision, the contractor must provide all flagging costs and services as ordered by the Engineer, with 30 days' advance notice required to the railroad. The contractor will be reimbursed for actual costs incurred, with payment made monthly on a cost-basis subject to Engineer approval. Revised Contract Drawings 11 through 12 reflecting quantity changes are to be issued to the successful bidder. The total contract amount for contingency work and the Contractor's Quality Program (CQP) is $3,322,000.00.