Proof Rolling and Subgrade Evaluation Services

The contract calls for proof rolling of subgrade using loaded vehicles to identify soft spots, verify uniform support, and confirm compliance with designated engineering specifications. This service is critical to ensuring the structural integrity of the base layer prior to further construction, with a focus on detecting potential failures through mechanical stress testing. Contractors must execute the work in accordance with established standards and provide detailed documentation of findings to demonstrate adherence to design requirements. The work is being solicited as a subcontract by Portage County in Wisconsin under NAICS code 238990 and is open for responses until July 28, 2026, at 2:00 PM. The solicitation is posted on the Wisconsin VendorNet portal and does not include a set-aside designation. While specific location and contact details are not provided, the performance location is expected to be within Portage County, and bidders must be prepared to meet all technical and procedural requirements for subgrade evaluation as outlined in the project’s engineering guidelines.