237. (1) This section applies during shaft sinking and preliminary development work during shaft sinking at an underground mine. R.R.O. 1990, Reg. 854, s. 237 (1). (2) A bucket used to transport persons shall, (a)  be provided when the vertical depth of a shaft below the collar exceeds fifty metres; (b)  be at least 1.07 metres high; and (c)  be designed as prescribed by subsections 230 (3) and (4). R.R.O. 1990, Reg. 854, s. 237 (2). (3) Where the distance between a head sheave and the shaft bottom exceeds 100 metres a crosshead shall be used with a bucket. R.R.O. 1990, Reg. 854, s. 237 (3). (4) A crosshead shall be, (a)  landed on at least two chairs at the bottom crosshead stop to prevent distortion; (b)  attached to the rope by a safety appliance in such manner that where the crosshead jams in the shaft compartment, the bucket is stopped; and (c)  of a type that encloses the bucket unless, (i)  the shaft compartment is tightly lined, and (ii)  the bucket is barrel-shaped. R.R.O. 1990, Reg. 854, s. 237 (4). (5) Dual lights shall be installed to indicate to the hoist operator that, (a)  the crosshead and bucket are descending together from the bucket dumping position; (b)  the service doors are in or out of the shaft compartment; and (c)  the dump doors are in or out of the shaft compartment. R.R.O. 1990, Reg. 854, s. 237 (5). (6) A service door or doors as prescribed by subsection (7), to cover the sinking compartment of a shaft, shall be provided. R.R.O. 1990, Reg. 854, s. 237 (6). (7) The service door or doors required by subsection (6) shall, (a)  be installed at the collar and any place in the shaft where tools and other materials are loaded or unloaded into or from the bucket; (b)  be automatically latched out by mechanical devices when out of the shaft compartment; (c)  be closed when a bucket is being loaded or unloaded with tools and other materials; and (d)  be closed when persons are entering or leaving a bucket, except where the closed crosshead provides equal protection for persons. R.R.O. 1990, Reg. 854, s. 237 (7). (8) Dump doors shall be installed and maintained that, (a)  prevent a bucket from being dumped when the dump doors are open; (b)  prevent any material from falling down the shaft while the bucket is being dumped; and (c)  are provided with devices that securely latch the dump doors out of the shaft compartment automatically. R.R.O. 1990, Reg. 854, s. 237 (8). (9) Where a multi-deck stage is being used, the stage shall be, (a)  designed by an engineer in accordance with good engineering practice; and (b)  built in accordance with the design. R.R.O. 1990, Reg. 854, s. 237 (9); O. Reg. 373/22, s. 19. (10) Before the initial use of a multi-deck stage, the employer shall give notice to the joint health and safety committee or to the health and safety representative, if any. O. Reg. 236/99, s. 9. (11) A bucket shall be filled so that no piece of loose rock projects above the level of the rim. R.R.O. 1990, Reg. 854, s. 237 (11). (12) No person shall ride on the rim of a bucket. O. Reg. 296/11, s. 17. (12.1) A person who is being transported by a bucket shall ride inside the bucket. O. Reg. 296/11, s. 17. (13) The worker authorized to give signals for hoist movement shall, (a)  maintain proper discipline of persons riding in the bucket; and (b)  enforce the loading restrictions of the conveyance permit. R.R.O. 1990, Reg. 854, s. 237 (13). (14) No person shall obstruct the worker mentioned in subsection (13) from performing his or her prescribed duties. R.R.O. 1990, Reg. 854, s. 237 (14). (15) A bucket shall not be allowed to leave the top or bottom of the shaft until the bucket has been steadied. R.R.O. 1990, Reg. 854, s. 237 (15). (16) A bucket returning to the shaft bottom shall be, (a)  stopped at a distance at least five metres and not more than ten metres above the bottom of the shaft; and (b)  lowered slowly below the point described in clause (a) only on a separate signal. R.R.O. 1990, Reg. 854, s. 237 (16). (17) On the initial trip following a blasting operation, no bucket transporting workers shall be lowered below a point, (a)  less than fifteen metres above the blasting set or bulkhead; or (b)  where the health and safety of workers is likely to be endangered. R.R.O. 1990, Reg. 854, s. 237 (17). (18) Below the point prescribed in subsection (17), the bucket shall be lowered slowly on the signal of the workers being transported and only a sufficient number of workers shall be transported on the initial trip as are required to conduct a proper examination of the part of the shaft that may be affected by the blast. R.R.O. 1990, Reg. 854, s. 237 (18). (19) Persons may be at the bottom of the shaft during the dumping cycle of the shaft conveyance. R.R.O. 1990, Reg. 854, s. 237 (19).