supply of materials for construction of gravel road from chaitar more to khoka ram barman house ( sl no-3 ) :-1 stone aggregate ( single size ) : below 40 mm nominal size 2 loading, unloading and stacking sand / stone aggregates ( less than 40mm nominal size ) 3 river bed material 4 stone aggregate ( single size ) : 63 mm nominal size 5 stone aggregate ( single size ) : 40 mm nominal size and above 6 loading, unloading and stacking sand / stone aggregates ( above 40mm nominal size ) 7 stone screening type a ( 13.2 mm ) 8 hire charges of diesel road roller- 8 to 10 tonne 9 supply of display board 10 worksite facilities