Skip to main content
News & Events


OHIO811 Excavator Manual

The latest update (December 2021) of the OHIO811 Excavator Manual can be found here.

It includes changes that were approved through the Marking Standard Committee in 2021.

The changes were:

  • A symbol for facilities greater than 36 inches. Page 29
  • Best Practice Note: An 18-inch tolerance zone should be respected around all above ground infrastructure. Page 16
  • Best Practice Note: Identifying markings such as facility owner, size and type shall not be used as a measuring point when establishing the tolerance zone of a buried utility. Page 16
  • Additional material type FG, Fiber Glass. Page 39

Remember to contact OHIO811 before any excavation. It’s the law.

Considering sponsorship? Your logo could appear here!