I-25-2017 Addendum 1.pdf

This document is Addendum No. 1 to Contract Requirements for the Illinois State Toll Highway Authority (ISTHA), specifically for the Tri-State Tollway Landscape Planting Improvements project. The contract covers improvements along the 98th Street to I-55 corridor, Mile Post 17.7 to Mile Post 23.1, and is identified as Contract No. I-25-2017. The addendum is dated April 30, 2025, and provides a revised Schedule of Prices for the project, with proposals to be received through electronic bidding via BidBuy until June 6, 2025.

The Schedule of Prices includes numerous line items for landscaping and highway improvement services, such as tree and shrub planting, fertilization, erosion control, maintenance of traffic, and various supplemental activities. Key pricing components include contractor's quality program ($24,000), allowances for unforeseen maintenance and erosion control, and specific line items for planting various tree and shrub species. The document includes both positive and negative pricing adjustments, with contingency work totaling $174,000. The contract appears to be structured with flexibility for additional maintenance, traffic control, and landscaping services, with unit prices established for different quantities and specific project requirements.