Measurements

The length and breadth of\excavation or filling shall be measured with a steel tape correct to the nearest cm. The depth of cutting or height of filling shall be measured correct to 5mm, by recording levels before the start of the work and after the completion of the work. 

In case of fairly uniform ground the Engineer-in-charge may permit the measurement of depth of cutting or height of filling with steel tape, correct to the nearest cm. Borrow pits, diagonal ridges,-cross ridges or deadmen, the position of which shall be fixed by the Engineer-in-Charge, shall be left to permit accurate measurement being taken with steel tape on the completion of the work. 

Measurement of the excavation where ordinary rock and hard rock is mixed shall be made in the same way. The two kinds of rock shall be stacked separately, measured and each reduced by 50% to allow for voids to arrive at the quantity payable under hard rock and ordinary rock. The difference between the entire excavation and the sum of the quantities payable under hard rock and ordinary rock shall be paid for as excavation in ordinary soil or hard soil as the case may be.