Terry watches on as Brad begins to grade the trackbed. Steve is using the transit stick to measure the height of the bed at known distances from the optical level. This is then compared to the calculated level at this point to give Brad a guide as to how much more stone needs to be removed.
Terry watches on as Brad begins to grade the trackbed. Steve is using the transit stick to measure the height of the bed at known distances from the optical level. This is then compared to the calculated level at this point to give Brad a guide as to how much more stone needs to be removed.
Credit: Phil Hamerton, 23/02/2016