Client-Tailored Solutions

The Sigma Group delivers timely, cost-effective projects. First, we develop an understanding of our clients’ priorities, then deliver services to facilitate their needs. We apply this approach throughout all due diligence studies to project completion.

Water Street

Sigma offers a complete range of civil engineering services for commercial, industrial, residential, and municipal development and infrastructure projects:

Site Development Services

  • Initial due diligence and feasibility studies
  • Paving plans / pavement structure design
  • Erosion control plan / permitting
  • Grading/drainage plans / mass balance
  • Layout planning
  • Utility plans
  • Stormwater management plans / reports / permitting
  • Sustainable site design (LEED® accredited professionals)
  • Wetland delineation / NR 103 Alternatives Analysis

Utility Design Services

  • Coordination with private utilities
  • Private site utility design / permitting
  • Public water main, sanitary sewer and storm sewer design / permitting

Stormwater Management Planning / Design

  • Conveyance systems design
  • Maintenance plans
  • Modeling
  • NR 216 Notice of Intent submittals / permitting
  • Site infiltration evaluations


  • HEC-RAS flood plain analysis
  • WDNR Chapter 30 Waterway permitting
  • Federal permitting

Transportation Planning / Design

  • Pavement structure design
  • Public and private roadway design
  • Public presentations / involvement
  • Traffic impact studies

Geotechnical Investigation Coordination

  • Foundation, floor slab and pavement structure recommendations
  • Site preparation / engineered fill recommendations
  • Stormwater infiltration site evaluations

Services Offered During Construction

  • Close-out inspections and documentation
  • Construction Management
  • Construction Administration

Featured Projects

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