Skymaster Subgrade Evaluation and Compaction Feasibility

Form / Attachment / Pricing Sheet

This document appears to be a map or aerial image with annotations detailing proposed construction or repair work, likely related to road resurfacing or paving. It outlines specific areas for full depth work, milling and overlay, and indicates areas that are not part of the current project.

• "Full Depth Skymaster Phase 2": 35,097 sq ft
• "Full Depth N Skymaster Phase 1": 36,470 sq ft
• "Milling Overlay Skymaster Round about": 13,114 sq ft
• "Second Phase - Not part of this project": Indicates an area excluded from the current scope.
• "this area is mill and overlay- no need for sub grade testing": Specifies a section where only milling and overlay are required, without sub-grade testing.
• "this area is the proposed full depth area and need sub grade testing": Identifies a section requiring full depth work and sub-grade testing.
• "Road Length - 710 LF, Area - 36,470 SF": Provides measurements for a specific road section.

This document is crucial for bidders to understand the physical scope of work, including the specific areas requiring different types of treatment (full depth vs. mill and overlay), the extent of the work in square footage and linear feet, and any areas excluded from the project. It also highlights critical testing requirements (sub-grade testing) for certain areas, which will impact planning and execution.

Statement of Work (SOW) / Performance Work Statement (PWS)

To determine the feasibility of subgrade evaluation and compaction for a roadway reconstruction project at Skymaster Dr, Travis AFB California.

• Obtain a representative subgrade soil sample of the existing subgrade.
• Perform necessary testing in accordance with applicable codes and standards.
• Confirm the subgrade can achieve 95% compaction.
• Provide written recommendations regarding subgrade suitability and any need for stabilization.
• Submit all findings to the base for review.

The existing roadway has approximately 6 inches of asphalt concrete (AC) and underlying aggregate base (AB). The planned reconstruction involves removing the existing AC and AB to a total depth of 18 inches and replacing it with a new section consisting of 6" Asphalt Concrete and 12" Aggregate Base. Before reconstruction, it must be confirmed that the exposed subgrade can adequately support the new pavement and achieve 95% relative compaction.

• Assess if the in-place subgrade soil has sufficient strength and stability for the new pavement structure.
• Determine if 95% compaction can be achieved without lime treatment or other stabilization.
• Verify if additional geotechnical remediation is required.
• Ensure the subgrade meets project specifications for moisture, density, and classification.

Not specified in the document.

Testing must be in accordance with applicable codes and standards. Recommendations must be provided in writing. Findings must be submitted to the base for review.