There are no hidden dangers that cannot be eliminated and there are no unavoidable accidents.
The data should be collected well & used on training new employees on a regular basis.
The fully prepared for the pre-construction risk analysis must be made. Emergency plans are deal with accidents timely, which must be paid high attention, with no palsy & relax.
Each accident is almost always due to the negligence of the works, so emergency plans must be consummated to any possible incidents