Railroad tracks rocks
4608 x 3456 jpeg 4479kB, Symmetrical Balance crystallopezphoto 4920 x 3251 jpeg 4315kB, Free stock photo of bridge, clouds, cloudy 750 x 563 jpeg 558kB, File:Bristol ag railway tunnel 02.jpg - Wikimedia Commons 1300 x 919 jpeg 273kB, Railroad Repair Equipment At Crossing Stock Photography 3000 x 2008 jpeg 2650kB, Old stone brick wall stock background free texture www 2560 x 1920 jpeg 2131kB, Koreainphotos Korea in Photos Track ballast - wikipedia, Track ballast. track ballast forms trackbed railroad ties (sleepers) laid. packed , , ties. bear load railroad ties, facilitate drainage water, vegetation interfere track structure.. Track ballast. Track ballast forms the trackbed upon which railroad ties (sleepers) are laid. It is packed between, below, and around the ties. It is used to bear the load from the railroad ties, to facilitate drainage of water, and also to keep down vegetation that might interfere with the track structure. What kind rocks ...