South Dakota Department of Transportation

US-18 Wetland Delineation

Lincoln County, SD

Benesch completed a wetland delineation on eight miles of US-18 in Lincoln County, South Dakota. Benesch prepared wetland delineation reports, functional classification, jurisdictional determination requests, calculated permanent and temporary impacts, and completed a mitigation needs assessment.

During field investigation, Benesch biologists identified 35 acres of wetlands. These wetlands were observed along stream channels, swales, isolated depressions and within US-18 road ditches. In addition, prairie potholes, riverine and slope wetlands were assessed with the Hydrogeomorphic Approach using established field protocols.

Project highlights

  • Completed a wetland delineation on eight miles of US-18
  • 35 acres of wetlands identified