Southern Railway — careless while transferring coal through cargo

Address:

Thiruvallur route train, Chennai, Tamil Nadu, 631210

Last month i noticed that coal carrying cargo where not cover the each car with covers due this coal scattered from the car untill it reach destination.
According to my calculations each day 05 kg of coal where loss for one month crossed 150 kg coal. Coal is a non conventional energy so please take action

Why the cargo locomotive pilots and the coal industry don't notice this kind of losses