Tom Rickert, the county's deputy director of transportation, told the Transportation Committee on Tuesday that a November letting for the project will likely lead to a March groundbreaking.
The Longmeadow project will add about 5.6 miles of road from Route 62 across the Fox River to Huntley Road in the Algonquin, Carpentersville and Lake in the Hills area.
The committee supported two resolutions tied to the first stage of construction, which is from Huntley Road to Randall Road.
The first resolution addressed an intergovernmental agreement with the Illinois Department of Transportation that will provide for federal reimbursement toward a portion of the construction from Huntley Road to west of the Randall Road intersection.
Rickert said the first stage of construction will be funded by state and federal funds at 91 percent, which is about $6.9 million. He said the county's share will be at 9 percent, which amounts to nearly $700,000.
Overall costs have been estimated at $120 million.
The committee also supported a resolution about a Phase III construction engineering services agreement with Itasca-based Bollinger, Lach and Associates Inc. The negotiated contract is for an amount not to exceed $619,311.65, according to an agenda document.