During my time at Conway, an air wand with 100 psi will blast out any dirt packed to the top of the rail head right down to the base of the rail. The pipe nozzle was about a half inch wide and had a blast shield on the end. Although the shield did not shield all the dirt, it did help some. Each year we would go to the crossings in Hazens and work our way back. The crossing at Hazens was dirt, and over the course of the winter, you could not even see the rails. After a half hour of using the air wand, the crossing was usable once more. No picks were used, only shovels to help clear the debree blasted out.