Explore damage prevention information, local contacts and rules for safe digging in Oregon.

One Call Centers

811 or


305 NE 102nd Avenue
Suite 300
Portland, OR 97220-4170


24 / 7

Advance Notice:

2 days

Marks Valid:

life of the project



Legislative Information

yes Mandatory Membership
yes Civil Penalties
yes Tolerance Zone 24"
yes Hand Dig Clause
yes Mandatory Premark
yes Emergency Clause
yes Positive Response
no Depth Exemption

Regional Partners

Northwest Region Common Ground Alliance

Geographic Location:

States of Washington, Oregon and Idaho


Scott Sammons
Northwest Region Common Ground Alliance

Partner Since:

April 2003


The Northwest Region Common Ground Alliance (NWCGA) is comprised of industry leaders from the states of Washington, Oregon, and Idaho. Our mission is to encourage operators of one-call notification programs, all excavators, and underground facility owner/operators to adopt and implement practices identified in the Common Ground Alliance best practices report.