Some coal beds lie within 200 feet of the earthâs surface. These beds are mined by stripping the top soil off the coal. Then the coal is dug out. This is called surface mining. Deeper coal beds can be found up to 1,000 feet/305 meters below the earth.
The DART rate includes company-reported injuries that result in days away from work, restrictions from normal job duties, or both. While the national DART rate average is 2.5 per 100 employees, this yearâs targeted group of companies scored 6.0 or higher when OSHA surveyed the companiesâ injury reports last year. Overall, 14,000 general industry and construction companies were notified, and OSHA is currently looking at 4,250 work sites as primary inspection targets based on DART rates.
Dart is used for building web, server, and mobile apps. Dart is a class-based, single-inheritance, object-oriented language with C-style syntax.It supports interfaces, abstract classes, reified generics, and optional typing. Static type annotations do not affect the runtime semantics of the code.he Dart SDK also ships with a stand-alone Dart VM, allowing dart code to run in a command-line environment. As the language tools included in the Dart SDK are written primarily in Dart, the stand-alone Dart VM is a critical part of the SDK.