Designs for larger or more complex vessels may also include sail plans, electrical schematics, and plumbing and ventilation plans.
2.
Jim Walter Resources failed to follow a federally-approved ventilation plan during a coal mine fire in October, according to a final accident report compiled by the U . S . Mine Safety and Health Administration.
3.
From early July to late September, MSHA found 70 violations, 42 of which were S & S . MSHA inspections from early October to late December resulted in 46 citations and three orders, 18 of which were S & S . Violations include failure to follow the approved roof control and mine ventilation plans and problems concerning emergency escapeways and required pre-shift safety examinations.
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