Construction And Materials

Earthwork and erosion control

Current seed application date extensions or delays: The spring cutoff date for permanent rural and urban, native grass, and salt tolerant seeding has been extended to June 7, 2021. Currently, any extensions past this date are at the discretion of the engineer on a project by project basis.

Approved Seed Conditioners

  • Iowa - go to "Approved Conditioners"
  • Illinois - see list under "Seed Directories"
  • Minnesota - go to "Approved Facilities"
  • Missouri - contact Missouri Crop Improvement Association, 573-449-0586
  • Nebraska
  • South Dakota - go to "South Dakota Certified Seed Grower Directory," and choose the current Issue
  • Wisconsin - contact Wisconsin Crop Improvement Association, 1-800-892-1341