The Oklahoma Ultrahazardous Activities (OSHA) are activities that pose an inherently higher risk of harm than normal activities. These activities involve activities that a reasonable person would recognize as dangerous or inherently hazardous. OSHA can include activities such as the operation of heavy machinery, the use of explosives, or other activities that could cause serious injury or death. Types of OSHA include: -Explosives: Handling and using explosives or explosive materials, such as blasting caps or dynamite. —Heavy Machinery: Operating and using heavy machinery such as bulldozers, cranes, or other large machinery. —High-Voltage Electricity: Working with high-voltage electricity or electrical systems. —Toxic Substances: Working with toxic substances, such as asbestos, chemical compounds, or other hazardous materials. —Structural Construction: Constructing or repairing structures, such as buildings or bridges. —Aerial Work: Working in elevated areas, such as on rooftops or on scaffolds. —Firefighting: Fighting fires or working with flammable materials. —Railway Activities: Working with railway systems or equipment. —Mining: Working in mines or quarries— -Underwater Activities: Working underwater, such as in oil rigs or underwater caves.