A company or institution with an approved quarry is required to supply backfill materials. The project is in three different locations that need backfill: 1) Location in Najran Quantity: (108,440) cubic meters. 2) Location in Satara, about 90 km after Al-Aflaj Quantity: (539,731.7) cubic meters 3) Location in Dawadmi Quantity: (84,710.8) cubic meters Please, those who contact me should be decision-makers, have a quarry, and send a price offer for the location that suits them.