infrastructure construction inspections

Sigma provides on-site construction inspection services for the Wisconsin Dept. of Transportation, Municipal, and private infrastructure construction projects. Construction inspection services are provided to ensure contractor construction activities adhere to approved project plans and specifications, typical inspection activities include:

• Continuous construction observation
• Daily reports and progress/quantity documentation
• Conduct pre-construction and weekly progress meetings
• Utility coordination and public progress updates
• Review and monitor erosion control practices
• Review and monitor traffic control and staging areas for construction worker safety
• Monitor traffic flow of traveling public through work zones
• Review project submittals and shop drawings for conformance to plans and specifications
• Review material certifications and inspections
• Review contractor payment applications
• Review project as-built documentation and project close-out material

areas of construction inspection experience

Sigma has staff qualified and experienced in both rural and urban projects for the following construction activities:

• Site erosion control, landscaping and site restoration
• Mass grading/excavation and storm water management basins
• Underground utility installation (sanitary, storm and water main)
• Roadway grading, subgrade proofrolls, subgrade undercuts of poor soils
• Base course sampling and compaction testing
• Roadway paving of asphalt and concrete pavements including concrete curb and gutter
• Pedestrian facilities including concrete sidewalks, bike and multi-use trails
• Bridge structures over waterways, railroads and roadways (various structure types include; concrete slabs, precast concrete girders, steel girders and pre-fabricated steel truss bridges)
• Various retaining wall systems (cast-in-place concrete walls, secant pile walls, MSE walls, tied-back walls, modular block walls, timber landscape walls)
• Street lighting and traffic signal installations
• Pavement marking and signage (including sign structures)
• Unique construction activities including; various types of deep foundations, high capacity de-watering systems, directional boring, casing pipe installations, soil surcharge monitoring, soil dynamic compaction, etc.
• Construction activities adjacent to sensitive natural resources, navigable waterways, wetlands, endangered resource exclusionary fencing, etc.

Related Projects

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