The Michigan dig rules we run our own rigs by

At least 72 hours before you start, and no more than 14 calendar days before. The act counts business hours with its own clock rules, which is why the 72 hours is commonly paraphrased as three working days. The practical read is that you cannot call the day before, and you cannot call three weeks out and expect the ticket to still be alive when the crew arrives.

Positive response is the procedure that lets an excavator confirm whether every facility owner contacted on a ticket has answered, and Michigan puts it in the law at MCL 460.727(3). Each station on your ticket carries its own code, and every one of them has to read Marked or No Conflict before you dig. You can check status at response.missdig.org or by calling 800-763-3888. One thing that surprises people: a station can respond more than once within the same revision, so a ticket can go from 003 to 002 and back to 003.

001 is No Conflict, meaning that owner has nothing in the dig area. 002 is Marked. 003 is Not Complete, which means locating is unfinished and nobody digs. 004 is marked with the utility required on site, so you coordinate before equipment moves. 005 is ongoing coordination, used on project tickets while marking is being scheduled. 000 means the response is still pending and 999 means the station never responded, and both of those are do-not-dig conditions, with 999 usually calling for a retransmit.

The Michigan act uses the term caution zone, and it is 48 inches, four feet, on each side of the marks. Inside that zone you expose the facility using soft excavation, hand tools, vacuum, or pneumatic hand tools before power equipment goes near it. What most contractors call the tolerance zone maps more closely to the approximate location, which is the facility's width plus 18 inches on each side. Two different numbers doing two different jobs: one describes where the line is expected to be, the other governs how you are allowed to work around it.

On an emergency dig notice, three hours. On destroyed marks, they are re-marked within 24 hours of the request. On a request for additional assistance, three business hours. Those numbers only work in your favor if the request goes in when the crew first notices, which is why our foremen photograph destroyed marks against the ticket and the office calls it in that morning rather than at the end of the day.

Yes. Michigan has no homeowner exemption. Whoever is doing the digging is responsible for the notification, including a property owner with a shovel in their own yard. This is one of the differences worth knowing if you also work in Ohio, where a property owner digging on their own qualifying property may be exempt under conditions, and where that exemption goes away as soon as a contractor is hired.

No. You keep submitting through MISS DIG 811 exactly as you do now. Quick811 is what happens after: tickets land on a map, response and revision history stay readable, geo-stamped photos file to the right ticket, and the office and the field look at the same status at the same time. We built the 811 layer first on purpose, because the question underneath every job day is whether we can dig here.