Road Improvements, Platteville - CTH A

Grant County, Wisconsin is soliciting bids for road improvements on County Trunk Highway A in Platteville, with proposals due October 13, 2026. The scope encompasses grading, base construction, asphalt pulverizing, asphaltic pavement placement, culverts, concrete curb and gutter, salvaged topsoil application, pavement marking, beam guard installation, traffic control, and all incidental items shown in the contract plans.

Asphalt pavement work is subject to Wisconsin Department of Transportation HMA (Hot Mix Asphalt) Percent Within Limits (PWL) testing protocols. Contractors must conduct test strips demonstrating volumetric conformance — air voids between 3–5 percent, VMA greater than 13 percent, acceptable asphalt content and gradation, and density with PWL values exceeding 75 — before commencing full-scale paving. Test strips are paid through separate bid items for volumetric and density testing; acceptable HMA placed during test strips receives compensation under standard pavement items with pay adjustments calculated at $65 per ton based on PWL performance, ranging from 50 to 100 percent of the base rate. The department assesses $2,000 administrative penalties for delayed test strips and $2,000 for each additional test strip required due to initial disapproval or contractor-initiated mix design changes. If initial test strips fail to meet criteria, the engineer may require additional test strips or approve alternative plans prior to continued paving work.

No contract value, contract term, set-asides, or preference programs are identified in the source materials provided.