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Missouri 811 rules

In Missouri you call Missouri One Call System (Missouri 811): at least 2 working days but not more than 10 working days before commencing excavation. Ticket life: expires 11:59 p.m. 21 calendar days from start date; relocate request if markings unusable or can't start within 10 working days.

Advance notice before digging
At least 2 working days but not more than 10 working days before commencing excavation.
Farthest ahead you can call
10 working days.
How long the ticket or marks last
Expires 11:59 p.m. 21 calendar days from start date; relocate request if markings unusable or can't start within 10 working days.
Tolerance zone (hand dig inside it)
Not confirmed in the law we read. Ask Missouri One Call System (Missouri 811).
White lining (premarking)
Optional: may white line physically or electronically.
The law
RSMo 319.010-319.050 (notice 319.026).

Call 811 from anywhere in Missouri to reach Missouri One Call System (Missouri 811), or file online at missouri-811.org.

Running several digs at once?

TrackOver keeps each ticket number, markout date and expiry on the job it belongs to, and warns before a ticket runs out, so the crew in the hole isn't digging on a dead ticket.

811 ticket trackingFind dig work on the board

Where this comes from

Checked September 24, 2026 against the one-call center's published copy of the law, because the legislature's own site couldn't be read directly. Rules change; confirm with the center before a big job.

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