R 408.41461 Advance notice of tunnel excavation.

Rule 1461. (1) Before the start of a pressurized tunnel being constructed, modified, or repaired, that is 24 inches or more in diameter, height, or width, and that will be occupied by an employee, a report prepared by the employer performing the tunnel excavation shall be sent to the Michigan Department of Labor and Economic Opportunity, Construction Safety and Health Division, 530 West Allegan Street, P.O. Box 30645, Lansing, Michigan 48909-8145, in addition to the following civil authorities in the area: hospital, police department, fire department, and sheriff department. The report shall contain all of the following information: (a) Name of contractor or contractors. (b) Starting date. (c) Length of tunnel. (d) Diameter of cut. (e) Finished diameter. (f) Number of shafts. (g) Depth of shafts. (h) Location of shafts. (i) Method of tunneling. (j) Maximum working pressure in tunnel or shaft. (k) Type of primary liner. (l) Number of shifts. (m) Projected completion date. (n) Projected maximum work force within tunnel. (2) An employer shall notify parties notified pursuant to subrule (1) of this rule when the work has been completed. (3) If, after the start of any tunnel project, a tunnel or shaft that the employer has shown to be constructed, modified, or repaired under atmospheric conditions requires the tunnel to be pressurized, then the employer shall notify the Construction Safety and Health Division at the Michigan Department of Labor and Economic Opportunity, 530 West Allegan Street, P.O. Box 30645, Lansing, Michigan 48909-8145, 24 hours before allowing employees to enter the tunnel. (4) If the work operations of any occupied and pressurized tunnel projects are discontinued for 30 consecutive days or longer, then the employer shall notify the Construction Safety and Health Division at the Michigan Department of Labor and Economic Opportunity, 24 hours before resuming work operations on the tunnel project.