About Missouri One-Call (MO811)
Missouri One-Call (MO811) serves all of Missouri. Missouri has a mix of major metro areas (St. Louis, Kansas City) and extensive rural areas with agricultural infrastructure.
Submit tickets at https://www.mo1call.com or dial 811.
Required Wait Period
Missouri requires 3 business days notice before any excavation. MO811 offers online submission through their portal.
Use the Wait Time Calculator to find your exact dig date.
Ticket Validity & Re-Notify
Missouri's 30-day validity window is standard and among the more generous in the Midwest.
Private Lines in Missouri
Missouri has significant rural agricultural infrastructure, private well water throughout rural areas, and propane service lines in areas without natural gas distribution.
Full guide: What 811 Does NOT Cover.
Calculate Your Missouri Dig Date
Get your exact legal dig date, expiration, and re-notify reminder.
Open CalculatorRelated Guides
How 811 Works
Complete process guide.
Color Codes
What the marks mean.
Re-Notify Rules
Ticket expired mid-project?