2022 Manitoba Workplace Safety and Health Act and Regulation

Dump trucks
22.32(1) When a dump truck is used at a workplace, the safe work procedures
developed and implemented under section 22.2 must include
procedures respecting the use of other powered mobile equipment
to free a load trapped in the dump box of the truck.
22.32(2) When more than one dump truck is being operated at a workplace at
the same time, an employer must ensure that the trucks maintain a
sufficient distance between them to avoid contact if one of the trucks
tips over.
22.32(3) Before a dump truck dumps a load, an employer must ensure that the
ground on which the load is to be dumped is stable and capable of
withstanding the weight of both the truck and the load.
WORKING ON ICE
Definition: “ice”
22.33 
In sections 22.34 to 22.37, “ice” means ice that is
(a) over water, where the water is more than one metre deep; or
(b) over any other material into which a worker could sink more
than one metre.
Safe work procedures on ice
22.34(1) Without limiting section 22.2, where a worker is required or
permitted to use powered mobile equipment on ice, an employer
must
(a) develop and implement safe work procedures for the use of
powered mobile equipment on ice;

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(b) train workers in those safe work procedures; and
(c) ensure that workers comply with those safe work procedures.
22.34(2) The safe work procedures under clause (1)(a) must include
(a) procedures for testing the thickness of the ice to ensure that it
will support the load to be placed on it
(i) before any work begins, and
(ii) as often during the work as necessary to ensure that there
is no risk to the safety of the workers; and
(b) a plan for dealing with an emergency arising from powered
mobile equipment breaking through the surface of the ice.
22.34(3) For certainty, the safe work procedures under clauses (1)(b) and (c)
include the protection from drowning procedures prescribed in
subsections 6.17(3) and (4).