The national Call Before You Dig number, 811, was created to help protect you from unintentionally hitting underground utility lines while working on digging projects.
One call to 811 gets your underground utility lines marked for free!
Shareholder Inquiries: 1-877-208-7318
Call 811 before you dig.
For questions about a ONEOK Partners' Schedule K-1, please call 1-800-371-2188.